Pancake Summit 21-1 Geo Report (2)

INDEX

INDEX

Subject

Page Number

SYNOPSIS

01FORMATION TOPS

02DEVIATION RECORD

03BIT RECORD

05DRILLING FLUID PARAMETERS

06DRILLING CHRONOLOGY

07LITHOLOGY

16GEOLOGICAL SUMMARY AND CONCLUSIONS

35SYNOPSIS

OPERATOR

Plains Exploration and Production Co.WELL NAME

Pancake Summit 21-1SURFACE LOCATION

1475' FSL & 959' FEL, Sec 21, T18/N, R56EFIELD

WildcatCOUNTY/STATE

White Pine County, NevadaAPI NUMBER

27-033-05317NorAm FILE NUMBER

CR710ELEVATIONS

G.L. = 6388 ft

K.B. = 6402 ftSPUD DATE

16 March 2007T.D. DATE

18 April 2007DRILLING CONTRACTOR

Ensign Drilling, Rig 82HOLE SIZE

14.75" from 70 to 1574 ft

8.75" from 1574 to 6000 ft

CASING SIZE & DEPTH

9 5/8" at 1572 ftDRILLING MUD COMPANY

MI SwacoDRILLING FLUID TYPE

Water, Aerated Gel/SP101DIRECTIONAL COMPANY

Baker-Hughes INTEQWIRELINE LOGGING COMPANYBaker-AtlasLOG RECORD

HDIL-ZDL-CN-GR-DAL-CBIL-DIP-2 CALDRILLING SUPERVISION

Brent Gilbert, Mike SistrunckGEOLOGICAL SUPERVISION

Tony Baeten, NorAm Wellsite ServicesMUDLOGGING COMPANY

NorAm Wellsite Services, LLCTOTAL DEPTH

6000 ftFORMATION TOPS (ft)

KB = 6402

GL = 6388

FORMATIONPROGNOSISSAMPLESLOGS

MDTVDSSMDTVDSSMDTVDSS

Quaternary AlluviumSurf.+6402

Diamond Peak SS150150+6252Surf.Surf.

Chainman Shale360360+604214801479+492314931492+4910

Joana Limestone24502450+395234443433+296934693458+2944

Pilot Shale27802780+362239903981+242140083999+2403

Guilmette Limestone32803280+312247334724+167845644555+1847

Simonson-Sevy DOL49104910+1492

TD60006000+402

DEVIATION SURVEY RECORD (Teledrift and Wireline Data)

DepthInclAzimTVDVSCoordinatesDLS

(ft)(()(()(ft)(ft)N/S (ft)E/W (ft)((/100)

2850.4166.6285.00-0.59-0.20

4851.0180.5484.97-4.03-0.13

6850.7316.3684.95-5.13-0.84

7851.3312.5784.93-3.76-2.25

9851.8317.6984.850.21-6.17

11852.9314.51184.705.99-11.32

13853.7328.31384.2516.11-19.85

14854.2327.61484.0321.75-23.41

15225.63330.691520.1547.435.37-31.511.30

16197.58329.181616.9458.445.06-37.152.01

17178.51330.971713.4271.956.88-43.940.99

18148.90333.921809.7386.469.96-50.750.61

19129.43335.691905.93101.784.00-57.350.61

20099.25337.072002.08117.398.49-63.690.29

210710.61338.432098.06133.8114.04-70.041.41

22048.20336.112194.18149.6128.74-76.152.50

23016.26336.582290.84161.8139.97-81.082.00

23994.22340.282387.87170.6148.22-84.402.12

25941.59319.462582.46180.6157.63-88.191.78

26910.64331.202679.88182.5159.13-89.341.00

27890.19103.632777.32182.9159.57-89.440.80

28860.2487.302874.76182.7159.54-89.080.08

29830.3984.162972.20182.5159.59-88.540.15

30811.13187.903069.63181.6158.67-88.351.31

31700.463.33161.07

32700.688.63261.07

33700.258.43361.06

34700.382.73461.06

35700.280.33561.06

36700.265.13661.06

37700.698.43761.06

38700.593.73861.05

39700.7111.43961.05

40700.8105.24061.04

41701.0111.94161.03

42702.4145.84260.98

43502.2153.64340.89

44502.0159.44440.83

45502.2162.14540.78

46502.2156.74640.71

DepthInclAzimTVDVSCoordinatesDLS

(ft)(()(()(ft)(ft)N/S (ft)E/W (ft)((/100)

47502.2134.94740.64

48501.8129.94840.58

49501.9129.34940.53

50502.1127.85040.47

51502.3124.15140.41

52502.2119.35240.33

53502.7112.95340.24

54503.0105.05440.12

55503.7100.65539.92

56504.096.85639.70

57504.593.75739.43

58504.590.15839.13

59504.285.35938.82

BIT RECORD

BITTYPESIZEINOUTTOTALHOURSWOBRPMCONDITION

#(IN)(FT)(FT)(FT)DRLG(K)I/O/D/L/B/G/O/R

1STC XR-CPS14.7570564494365/2580

2STC G10BCPS14.7556411756114020/30100

3STC G10B14.75117515713963425120

4STC PD67838.751574215057629.520/2590

5STC FH 238.7521503157100749.520/3082/86

6STC FH 238.753157387071335.525/35110

R5STC FH 238.75387039801101210/20110

R6STC FH 238.75398640183248/13110

8STC FH 208.75401847317135715/20120

9STC FH 308.754731515442329.520/25110

10STC FH 408.75515460008464125100

DRILLING FLUID PARAMETERS

DateWtVisPVYPWLpHNaClCaTemp F

3/168.3268.035010063

3/178.5313120+9.427024072

3/188.9368819.69.23504084

3/199.14012810.49.747510085

3/209.2401389.89.652510088

3/218.5358620+8.94006067

3/228.938116188.84006082

3/238.959242016.29.44506090

3/248.957241816.29.44506082

3/258.945141016.29.54508081

3/268.94013816.29.54508082

3/278.844131112.59.44508080

3/288.83612610.89.235012070

3/298.83612610.89.235012072

3/308.845141110.29.235012075

3/318.944131110.29.235012083

4/018.94012910.29.135012075

4/028.948151510.19.135012075

4/038.73410616.89.030012074

4/048.73410616.89.030012074

4/058.750161615.49.030012076

4/068.745141310.19.030012083

4/078.6349818.68.930012072

4/088.63510818.68.830012075

4/098.63610919.68.930012072

4/108.63510819.68.930012078

4/118.6339619.88.810012073

4/128.6349719.88.810012098

4/138.63610919.88.810012098

4/148.738111319.88.75016098

4/158.742121319.88.75016098

4/168.746121519.88.750200102

4/178.73410719.88.750200103

4/188.63073208.750200-

4/198.639109208.750200-

DAILY DRILLING CHRONOLOGY

DATE

(m/d/y)DEPTH @

24.00PROGRESS

(ft/24 hours)BREAKDOWN

00:00 24:00RIG ACTIVITY

3/15/20077000000 2400Rig-up Ensign #82

3/16/20077220000 0200Rig-up

0200 0800Weld on Conductor & Flow Line;

Install rotating head

0800 1000Install Rig Floor

1000 1300Measure & Make up BHA

1300 2230Rig up wireline machine;

Work on #2 pump and shale shakers

2230 2400Spud well; Drill from 70 to 72 ft

3/17/20072111390000 0700Drill 14 hole from 72 to 103 ft

0700 0730Lubricate rig

0730 2400Drill ahead from 103 to 211 ft

3/18/20075643530000 0500Drill from 211 to 335 ft

0500 0530Condition mud; Circ. Hi-Vis sweep

0530 0600Deviation Survey at 290 ft = 0


2030 2100Circulate; Drop survey

2100 2400TOOH; Lay down bit & stabilizer

3/19/20079303660000 0300Make up shock sub, stabilizer, bit; TIH


0730 0830Deviation Survey at 612 ft = 1.0



1730 2400Drill ahead to 930 ft

3/20/200711752450000 0730Drill from 930 to 1029 ft

0730 0800Survey at 984 ft = 2.5


2100 2130Survey at 1140 ft = 3.0

2130 2400Trip out of hole

3/21/20071200250000 0400Change out bits; Trip in hole

0400 0430Ream from 1077 to 1175ft

0430 0500Drill from 1175 to 1185 ft

0500 0700Repair rig drum clutch iced up

0700 0800Mix and pump LCM pill

0800 1400Work pipe while mixing LCM

1400 1430Pump LCM pill

DATE

(m/d/y)DEPTH @

24.00PROGRESS



1430 1600Circulate LCM around

1600 1730Drill from 1185 to 1200 ft

1730 2000POOH

2000 2400Add stabilizer to BHA and Trip in hole

3/22/0714632630000 0130Trip in hole to 1187ft

0130 0500Repair Shakers; Circ. & condition mud



1930 2400Drill from 1414 to 1463 ft

3/23/0715711080000 1200Drill ahead from 1463 to 1544 ft

1200 1230Drill from 1544 to 1556 ft

1230 1300Repair rotary chain

1300 1600Drill from 1556 to 1571 ft

1600 1700Circulate; Pump Hi-Vis Sweep

1700 1730Drop Survey at


2000 2100Rig up Loggers and Crew

2100 2400Run wireline logs (Triple Combo / Sonic)

3/24/07157400000 0130Rig down loggers

0130 0400Make up bit; Trip in hole

0400 0630Circulate and condition hole

0630 0800Trip out to run casing;

Hole depth changed to 1574 ft

0800 - 1000Lay down 8 BHA

1000 - 1300Modify RT to flow to mud pits

1300 1430Held safety mtg; Rig up casing crew

1430 2030Run 9 5/8 casing & parasite tubing

2030 2100Rig down casing crew

2100 2400Circulate & work pipe

3/25/07157400000 0300Rig up BJs and cement 9 5/8 casing;

Perform top job

0300 0900Wait on cement

0900 1700Cut off & dress casing; Weld on well head (Test T/1000 V psi f/5min) good

DATE

(m/d/y)DEPTH @

24.00PROGRESS



1700 2400Nipple Up BOP

3/26/07158060000 0330Nipple Up BOP

0330 0730Repair rig, tear out floor;

Repair annular Hydril leak

0730 0900Test BOP: B/R, P/R, ANN, U/C, L/C

0900 1700Install wear bushing / make up BHA;

Trip in hole to 595 ft

1700 1900Seal leak in rotating head

1900 2030Trip in hole to 1524 ft

2030 2130Circulate; Test casing to 1500 psi, 30 min.

2130 2400Drill cement and shoe to 1569 ft;

Drill ahead from 1569 to 1580 ft

3/27/0717731930000 - 0330Drill ahead from 1580 to 1677 ft

0330 - 0500Survey and Drill ahead to 1682 ft

0500 0600Repair rotating head


1200 1230Deviation Survey at 1721 ft = 8

1230 - 1730Trip out of hole; Make up new BHA

1730 1930Thaw out draw works

1930 2130Trip in hole

2130 2400Ream from 1594 to 1773 ft

3/28/0721503770000 0530Drill from 1773 to 1878 ft

0530 0630Survey at 1826 ft = 8.25


1030 1200Survey at 1921 ft = 9.0

1200 1800Drill from 1973 to 2132 ft

1800 1900Deviation Survey at 2087 = 10


2000 - 2030Condition mud; Circulate bottoms up


2200 2300Unplug fill line

2300 - 2400Trip out of hole

DATE

(m/d/y)DEPTH @

24.00PROGRESS



3/29/07215000000 0130POOH; Lay down bit, N/B STB, P-DC

0130 1430Repair rig, remove Grant Head, install Williams Head; Weld flowline

1430 2230Pick up bit & VertiTrak motor, test tools


3/30/0725754250000 0030Circulate; Fill pipe



1200 1230Trip out; Wipe hole from 2814 to Shoe

1230 1330Lubricate Rig

1330 1430Trip in hole from casing shoe to 2814 ft


1530 1800Work on Pump #2, Change out swabs



0700 1400Work on #2 pump; Change swab & liner

1400 1630Drop Gyro and trip out to casing shoe

1630 2200Repair rotary table


4/02/0734512940000 0030Lay down motor & bit; Ck BOPs

0030 0230P/U motor & bit; Install corrosion rings

0230 0430TIH to 500 ft; Test motor No Good

0430 0600Trip out and lay down motor

0600 1000Pick up and test new motor; TIH to 2404

1000 1030Repair rig (Brake Water)



4/03/0738704190000 0900Drill from 3451 to 3630 ft; Lost Returns

0900 2300Drill ahead to 3870 ft w/ Partial Returns;

Lost 1090 bbl to Formation

DATE

(m/d/y)DEPTH @

24.00PROGRESS




4/04/07387000000 0300Trip out of hole; L/D bit; Ck BOPs

0300 0800Trip in open-ended DP to 3870 ft

0800 1100Building Form-a-Squeeze Pill

1100 1200Spot pill on bottom

1200 1300Trip out to 3002 ft; Circulate hole;

Pill didnt hold

1300 1800Build 2nd Form-a-Squeeze Pill

1800 1830Pump second pill at 3002 ft No Good

1830 1930Trip out to casing shoe

1930 2400Wait on pill

4/05/07387000000 1530Wait on pill

1530 1630Trip in hole from 1572 to 3500 ft

1630 1700Rig up cementers

1700 1900Spot 100 bbl cement plug at 3500 ft


2030 2400Make up BHA; Trip in hole

4/06/073918480000 0030TIH; Tag at 2136 ft

0030 0100Pick up & strap drill pipe

0100 0300Wash & ream from 2136 to 2372 ft

0300 0400TIH to 2690 ft

0400 0830Ream from 2690 to 3260 ft

0830 0900Repair rig

0900 1930Wash & ream from 3260 to 3870 ft

1930 2330Drill f/ 3870 to 3918 ft w/ Partial Returns;

Lost 960 bbls to Formaton

2330 2400Trip out for cement job

4/07/073980620000 0330Trip out of hole; Ck BOPs

0330 0530Trip in open-ended to 3600 ft


0700 0800Pump 150 bbl cement plug at 3600 ft

0800 0830Trip out to 3123 ft

0830 0930Lay down 15 joints DP

0930 1030Trip out of hole from 2646 ft

DATE

(m/d/y)DEPTH @

24.00PROGRESS



1030 1100Change Rotating Head rubber

1100 1300Make up bit, BHA; Trip in hole to 1572 ft


1400 1530Trip in hole from 1572 to 3897 ft

1530 1600Ream from 3897 ft w/ partial returns


4/08/074018380000 0230Trip out of hole; Ck BOPs

0230 0400Lay down VertiTrak tools


0430 0830Make up bit; Trip in hole

Strap DP: +6 ft Depth Corr. to 3986 ft

0830 0900Fill pipe

0900 1000Wireline Survey = 0.25

1000 1100Condition mud & build volume


1500 1530Circ. Spot Hi-Vis pill on bottom;

Lost 550 bbl to formation


1730 1830Wait on wireline truck

1830 2030Rig up Baker-Atlas loggers

2030 2400Run Triple-Combo log

4/09/074101830000 0830Run Dipmeter / Imaging log

0830 0930Rig down loggers

0930 1030Build 150 bbl pill in premix tank

1030 1330Make up new bit #8; Trip in hole


4/10/074132310000 0130Rig up Air Jammer to Standpipe


0530 0600Wireline Survey at 4112 ft = 1.0

0600 1000Trip out of hole; Ck BOPs

1000 1200Trip in open-ended to 3600 ft


1300 1430Spot cement plug at 3600 ft



1630 2000Make up BHA; TIH Tag at 4114 ft

Ream from 4114 ft to bottom

2000 2400Drill from 4125 to 4132 ft

DATE

(m/d/y)DEPTH @

24.00PROGRESS




0830 1000Wireline survey at 4209 ft No Good

1000 1400Pump sweep; Circulate & condition hole;

Ream thru bridge at 4244 ft

1400 1800Drill from 4254 to 4297 ft

1800 1830Wireline survey at 4257 ft = 2.5

1830 2400Drill ahead from 4297 to 4369

4/12/074450810000 0030Drill to 4380 ft

0000 0500Trip out of hole for E-Logs

0500 1330Rig up Baker-Atlas; Run Wireline Logs

1330 1530TIH to casing shoe

1530 1700Cut and slip drilling line


1830 1900Ream from 4336 to 4380 ft


4/13/0747312810000 0830Drill from 4450 to 4602 ft

0830 0930Wireline survey at 4557 = 2.0



1830 2030Make up new bit #9; Trip in hole to shoe


2130 2300TIH; Tagged bridge at 4500 ft

2300 2400Ream from 4500 to 4530 ft

4/14/0748561250000 0100Ream from 4530 to 4577 ft

0100 1000Packed off; Work stuck pipe at 4577 ft

1000 1100Circulate & rotate; Work pipe

1100 1230Ream from 4530 to 4729 ft

1230 1300Wipe hole; Short trip to 4444 ft



1930 2400Drill from 4793 to 4856 ft



0830 2000Drill from 5017 to 5154 ft


DATE

(m/d/y)DEPTH @

24.00PROGRESS



4/16/0754683140000 0200Make up new bit #10; TIH to casing shoe

0200 0500Rig Repair (Hydro-matic)




1330 2400Drill from 5270 to 5468 ft


1230 1300Circulate & clean hole

1300 1330Wiper trip to 5079 ft


4/18/076000300000 0100Drill from 5970 to 6000 ft TD


0130 0400Wiper trip to 3955 ft


0700 0730Repair rig

0730 1630Trip out of hole; Lay down BHA

1630 2400Rig up Baker-Atlas; Run E-Logs

Tagged up at 2285 ft

4/19/07600000000 - 0100Tagged up on second wireline attempt;

Pull out and lay down logging tools

0100 0330Trip in hole to 2669 ft; Work tight spot


0530 0930Rig up loggers & run in hole;

Tagged up at 2290 ft

0930 1200Trip in hole; Install rotating head

1200 1230Ream from 3350 to 3395 ft


1330 1400Ream from 5960 to 5995 ft

1400 1500Circulate; Spot pill on bottom


1800 2400Rig up and run wireline logs

Run #1: ZDL-CN-GR-CAL

4/20/07600000000 1730Logging; Run #2: HDIL

Run #3: STAR/CBIL


2030 2200Rig up cementers; Spot 1st plug on bottom

2200 2400Trip out to casing shoe

DATE

(m/d/y)DEPTH @

24.00PROGRESS



4/21/07600000000 0300Wait on cement

0300 2400TIH; Tag up and set 2nd plug at 4150 ft;

Set bridge plug & 25 sx cmt at 3350 ft;

Set 4th and 5th plug in casing

LITHOLOGY

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

Mississippian Diamond Peak Formation

70 - 250SHALE, medium-dark gray, gray brown, hard-moderately hard, massive-sub blocky, earthy-gritty texture, silty-sandy in part, grading to SILTSTONE, scattered mica, moderately-very calcareous, rare free crystalline calcite and crinoidal fossil fragments, minor brown and white LIMESTONE streaks with yellow-orange mineral fluorescence, trace light orange CHERT, trace pyrite

250 - 310SHALE, dark gray, medium gray-gray brown, moderately hard, massive-sub blocky, earthy-gritty texture, silty grading to SILTSTONE, scattered sand grains, rare pinkish tan TUFF, slightly-moderately calcareous, loose calcite, some indurated calcite and fracture fill, rare Crinoid stems, very finely disseminated pyrite and pyrite nodules, trace light brown LIMESTONE. Minor SANDSTONE, light brown, very fine-fine grained, hard, moderately sorted, sub angular-rounded, opaque-clear grains, calcareous cement, siliceous in part, rare micro pyrite

310 - 400SHALE, dark gray-gray brown, hard, massive-sub blocky, earthy-gritty texture, generally silty-sandy, scattered mica, slightly-moderately calcareous, minor calcite filled fractures and vuggy LIMESTONE, some coarse LIMESTONE fragments to 15 millimeters, rare crystalline pyrite concretions. Interbedded SILTSTONE, dark gray brown-olive, medium-dark gray, pinkish brown, hard, massive, moderately hard-brittle in part, slightly-moderately calcareous, argillaceous-sandy with scattered sand grains throughout, trace mica

400 - 490SHALE, dark gray-gray black, dark gray brown, hard-moderately hard, massive-sub blocky, earthy-gritty texture, silty-sandy in part with minor SILTSTONE streaks, scattered mica and very fine sand grains throughout, occasionally phyllitic, slightly-moderately calcareous, trace calcite filled fractures, some coarse calcite fragments to 10 millimeters with rare pyrite veining, some tuffaceous orange fragments with green mineral stain. Note: dark brown oily film on pits

490 - 550SILTSTONE, medium gray-gray brown, dark gray, moderately hard-hard, massive, gritty-earthy texture, slightly calcareous, generally sandy, argillaceous with interbedded SHALE, rare carbonaceous inclusions, trace mica, trace calcite filled fractures, scattered LIMESTONE fragments. Minor SANDSTONE, medium gray-dark olive gray, brown, hard-moderately hard, very fine grained, moderately sorted, subangular-rounded, opaque clasts / grains, silty, argillaceous in part, calcareous, scattered carbonaceous inclusions, trace disseminated pyrite and nodules, rare olive gray speckled CHERT

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

550 - 640SILTSTONE, dark gray-gray brown, medium gray, hard-very firm, massive, very argillaceous-sandy with minor very fine grained SANDSTONE, slightly-moderately calcareous, scattered carbonaceous flakes, trace fine-very fine mica. Interbedded SHALE, dark gray-gray brown, gray black, hard-moderately hard, massive-sub blocky, earthy-gritty texture, occasionally smooth-silky, micro micaceous-phyllitic in part, generally silty, slightly calcareous, rare crystalline calcite fragments

640 - 730SHALE, dark gray, dark gray brown-medium gray, gray black, hard-very firm, massive-sub blocky, abundant soft clay, earthy-gritty texture, silty-sandy in part, micro micaceous, slightly-moderately calcareous, numerous free crystalline calcite fragments, abundant coarse SHALE fragments and rounded cavings. Minor SILTSTONE, gray brown, medium-dark gray, hard-moderately hard, massive, very argillaceous-sandy, minor very fine grained SANDSTONE streaks, scattered mica, rare tuffaceous fragments

730 - 790SHALE, dark gray-gray brown, hard-firm, massive, sub blocky-platy in part, earthy-gritty texture, generally silty with scattered very fine sand grains, micro micaceous, slightly-moderately calcareous, abundant clay with coarse blocky SHALE fragments and rounded cavings. Minor SILTSTONE, dark gray brown-medium gray, hard-moderately hard, massive, generally argillaceous with very fine grained SANDSTONE streaks, scattered mica, abundant clay in samples

790 - 850SILTSTONE, dark-medium gray, massive-sub blocky, moderately hard, moderately calcareous, argillaceous, abundant SHALE. Interbedded SANDSTONE, light-medium gray, gray white-gray brown, slightly speckled, fine grained, very fine-medium grained in part, moderately-poorly sorted, subangular-well rounded, clear-slightly frosted, some translucent-opaque grains, very hard, calcareous cement, scattered dark lithic inclusions and mica, trace dark olive gray CHERT, minor TUFF, rare crystalline pyrite, trace light brown stain with spotty weak yellow streaming cut

850 - 940SHALE, dark gray-gray black, dark gray brown, medium gray, moderately hard, massive-sub blocky, gritty-earthy texture, slightly-moderately calcareous, occasionally very calcareous, increased free crystalline calcite, generally silty, micro micaceous in part, rare black lithic inclusions, trace LIMESTONE veins with rare pale yellow mineral fluorescence and residual ring cut. Trace SANDSTONE, tan, light-medium gray, gray brown, gray white, very fine-fine grained, moderately sorted, rounded-subangular, slightly frosted-clear grains, hard, calcareous cement, trace dark olive gray CHERT, trace pyrite, rare dull yellow orange fluorescence, halo-very slow streaming pale yellow cut. Note: oily film visible when cleaning samples

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

940 - 1120SHALE, dark gray-gray brown, gray black, hard, moderately hard-brittle in part, firm-soft with abundant clay, massive, sub blocky-platy in part, earthy-gritty texture, generally silty, micro micaceous, moderately calcareous, rare calcite lined fractures and free crystalline calcite. Minor SILTSTONE, dark gray brown-medium gray, hard-very firm, massive, argillaceous with very fine sand grains throughout, scattered mica, generally calcareous, abundant coarse SHALE cavings in earthy clay

1120 - 1150SHALE, dark gray-gray black, dark gray brown, hard-very firm, massive-sub blocky, sub platy, earthy texture, silty in part, slightly calcareous, minor calcite filled and lined fractures, trace loose crystalline calcite to 10 millimeters, occasional crystalline pyrite nodules, trace light green firm platy waxy SHALE

1150 - 1240CHERT, CONGLOMERATE, medium-light gray, gray white-blue gray, some light brown-pinkish tan, opaque-translucent, slightly speckled-mottled in part, cryptocrystalline, very hard, angular-blocky with numerous conchoidal fractures and micro fractures, some rounded pebbles. SANDSTONE matrix, light gray-light gray brown, pinkish tan, trace bright green-salmon orange, hard-very hard, very fine-coarse grained, poorly sorted, sub angular-rounded, clear-opaque, glassy in part, siliceous-cherty, calcareous in part, generally very conglomeratic, some free crystalline pyrite clusters. Lost Returns at 1185 ft.

1240 - 1330CHERT, CONGLOMERATE, medium-light gray, gray brown-dark gray, blue green, tan, translucent-opaque, occasionally clear, very hard, angular-blocky, scattered pyrite, predominantly cherty fragments and rounded-pitted pebbles imbedded in poorly sorted SANDSTONE matrix

1330 - 1420SANDSTONE, light-medium gray, light gray tan, fine-coarse grained, poorly-moderately sorted, angular-sub rounded, clear-slightly frosted, translucent-vitreous, hard-moderately well indurated, siliceous cement, slightly calcareous in small part, trace crystalline pyrite, some imbedded cherty fragments and CONGLOMERATE, trace dark brown stain with moderate streaming yellow cut

1420 - 1480SANDSTONE, medium-light gray, gray brown, salt and pepper, fine-medium grained, very fine-coarse grained, moderately-poorly sorted, sub angular-sub rounded, clear-opaque, vitreous-quartzitic in part, hard, siliceous, trace micro pyrite and crystalline cubes, scattered carbonaceous inclusions, occasional imbedded conglomerate fragments, rare shale partings. Minor CHERT, medium gray-blue gray, gray brown, dark gray, light gray-pinkish white, microcrystalline, hard, angular-sub blocky, trace very thin pyrite veins

Mississippian Chainman Formation Sample Top at 1480 feet

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

1480 - 1570SHALE, gray black-dark gray, dark gray brown, hard, moderately hard-brittle in part, sub blocky-massive, occasionally platy-splintery, earthy texture, micro micaceous, trace very finely disseminated pyrite, slightly-non calcareous, rare calcite micro fractures, thinly bedded fine-medium grained SANDSTONE with SHALE contact, numerous coarse platy fragments to 18 millimeters, abundant LCM

1570 - 1620SHALE, dark gray-dark gray brown, gray black-medium gray, moderately hard-brittle, hard, massive-sub blocky, subfissile in part, earthy texture, very slightly calcareous, carbonaceous in part, trace light brown LIMESTONE laminae, trace calcite filled and lined fractures, rare mineral fluorescence with very slowly seeping yellow white cut, trace cement from casing set at 1572 feet

1620 - 1700SHALE, dark gray brown, dark gray-gray black, trace medium brown, hard-moderately hard, brittle, massive-subfissile, earthy texture, non-slightly calcareous, silty in part with occasional imbedded very fine sand grains, micro micaceous, slightly carbonaceous in part, rare pyrite veining, minor LIMESTONE contacts and fossil fragments, calcite filled fractures, trace dark brown stain with faint yellow white cut

1700 - 1750SHALE, very dark gray-gray black, hard-moderately hard, sub blocky-massive, platy-brittle in part, earthy texture, micro micaceous, slightly-non calcareous, scattered opaque gray cherty fragments and pebbles, very finely disseminated pyrite. Interbedded SANDSTONE, medium-light gray, mottled in part, fine-medium grained, numerous coarse grained conglomeratic fragments, moderately-poorly sorted, subangular- rounded, translucent-opaque, clear-vitreous in part, hard, siliceous-slightly calcareous cement, numerous CONGLOMERATE pebbles and SHALE inclusions, minor crystalline pyrite streaks, generally tight, faint milky yellow residual ring cut

1750 - 1820SANDSTONE, medium-light gray, gray white, mottled-speckled in part, very fine-medium grained, very coarse grained-conglomeratic in part, moderately-poorly sorted, subangular-rounded, translucent-opaque, hard, slightly calcareous-siliceous cement, numerous pebbles and cherty fragments, some SHALE contacts and dark lithic inclusions, rare pyrite concretions. Minor CHERT, gray brown, light-medium brown, light gray-light green, pinkish tan, mottled-opaque, micro-cryptocrystalline, very hard, angular-blocky, rare calcite edges, conglomeratic, trace disseminated and very fine crystalline pyrite. Interbedded SHALE, dark-medium gray brown, gray black, moderately hard-brittle, hard, massive-subfissile, sub blocky, earthy texture, gritty in part, non calcareous, silty with some fine-coarse imbedded sand grains, trace free crystalline calcite, scattered mica

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

1820 - 1960SHALE, dark gray-gray black, dark gray brown, hard-moderately hard, sub blocky-massive, platy-brittle in part, earthy texture, predominantly non calcareous, scattered mica and micro pyrite. Minor conglomeratic SANDSTONE, medium-light gray, gray white, trace pinkish tan, slightly mottled-speckled, fine-medium grained, very coarse grained in part, moderately-poorly sorted, subangular-well rounded, translucent-opaque grains, vitreous in part, scattered CONGLOMERATE pebbles and CHERT fragments, well cemented, slightly calcareous-siliceous, trace-nil intergranular porosity, abundant LCM contamination

1960 - 2010SANDSTONE, light-medium gray, light gray brown, gray green, generally mottled-speckled, fine-coarse grained, moderately-poorly sorted, well rounded-angular, clear-opaque grains with numerous pebbles and CHERT fragments, hard-friable, slightly calcareous-siliceous cement, trace-nil intergranular porosity, no visual show. Abundant SHALE, dark gray-brown gray, occasionally black, hard-very firm, blocky-massive, micro micaceous, earthy in part, non calcareous, occasional pyrite, LCM contamination, poor returns

2010 - 2100SHALE, dark gray-brown gray, black in part, hard-firm, occasionally brittle, massive-blocky, scattered mica, earthy, non calcareous, very finely disseminated pyrite. Minor SANDSTONE, medium-light gray, dark gray, speckled, translucent in part, very firm-hard, poorly-moderately sorted, sub angular, conglomeratic in part, numerous gray brown to blue green CHERT fragments, very weak calcareous-siliceous cement, trace dark brown LIMESTONE, poor sample quality

2100 - 2150SHALE, dark gray-black, dark gray brown, moderately hard, hard-brittle, massive-sub blocky, sub platy, earthy-slightly phyllitic texture, non calcareous, trace calcite filled fractures, micro micaceous, silty in part. Interbedded SANDSTONE, light gray-brown gray, medium gray, slightly speckled, very fine-coarse grained, subangular, clear-opaque, vitreous, hard, calcareous cement, siliceous-conglomeratic in part, occasionally silty, scattered very fine crystalline pyrite

2150 - 2190SHALE, medium-dark gray brown, dark gray-gray black, dark brown, massive-sub blocky, subfissile, earthy texture-dense in part, hard-brittle, moderately hard, non-slightly calcareous, siliceous, slightly micaceous, rare disseminated pyrite, occasional white calcite and dolomite fractures, minor medium-dark brown CHERT. Trace SILTSTONE, medium-light gray brown, hard, sub blocky, siliceous, slightly calcareous, grading to very fine grained SANDSTONE

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

2190 - 2250SHALE, dark gray, medium gray-gray brown, gray black, hard, moderately hard-brittle in part, sub blocky-massive, earthy texture, silty in part, micro micaceous, rare crystalline pyrite, very slightly-non calcareous. Minor SANDSTONE, light-medium gray, gray white-gray brown, slightly speckled-mottled, fine-very fine grained, medium grained-silty in part, moderately sorted, subangular-rounded, clear-frosted, translucent-opaque grains and lithic inclusions, hard-moderately hard, siliceous-calcareous cement, trace very finely disseminated pyrite, generally tight, no visual show

2250 - 2320SHALE, dark gray brown-gray black, medium-dark gray, hard, sub blocky-massive, earthy texture, micro micaceous, silty in part, minor SANDSTONE streaks, slightly-non calcareous, occasionally brecciated with light gray-white calcite and DOLOMITE fragments, rare micro pyrite veining. Note: Corrosion Inhibitor Added to Mud System

2320 - 2350SHALE, dark gray-gray black, dark gray brown, medium gray, hard-occasionally brittle, sub blocky-massive, platy in part, earthy texture, silty in part with minor SANDSTONE streaks, rare crystalline pyrite clusters, trace calcite lined fractures, numerous coarse SHALE fragments to 18 millimeters with some cavings, sample oily with mud additive (Corrosion Inhibitor), immediate bright yellow white cut

2350 - 2400SILTSTONE, dark-medium gray brown, mottled in part, hard-very firm, blocky-massive, slightly-moderately calcareous. Interbedded SANDSTONE, dark-light gray, brown gray, mottled-speckled, very fine-medium grained in part, hard-very firm, sub rounded-sub angular, moderately-poorly sorted, occasional pyrite, trace calcite fracture fill. Abundant SHALE, dark gray brown-black, massive-blocky, very firm-hard, brittle in part, earthy texture, slightly-non calcareous, disseminated-crystalline pyrite, rare pyrite splinters, occasionally silty

2400 - 2490SHALE, dark gray-black, blocky-massive, hard-firm, occasional micro micaceous-earthy texture, occasionally waxy, non calcareous, silty in part. Minor SILTSTONE, medium gray-brown gray, slightly mottled, hard-moderately hard, some imbedded sand grains, slightly-moderately calcareous, trace mica

2490 - 2550SHALE, dark gray brown-brown black, gray black, trace mottled with fine-medium light-dark green grains, hard-moderately hard, massive-sub blocky, subfissile in small part, earthy-gritty texture, non calcareous, siliceous in part, trace calcite filled and lined fractures, rare free chalky white calcite, rare dolomite filled fractures, scattered disseminated and micro pyrite nodules, increasing silt and sand, slightly carbonaceous in part. Interbedded SILTSTONE, medium gray brown-light brown, blocky, gritty texture, hard, siliceous-slightly calcareous, some micro crystalline pyrite, grading to very fine grained SANDSTONE in part

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

2550 - 2580SHALE, gray black-dark gray, dark gray brown-brown black, black, massive-sub blocky, earthy texture, trace smooth, hard-moderately hard, very firm, non calcareous, trace calcite filled fractures, scattered micro mica, some disseminated pyrite, slightly silty in part with imbedded very fine sand grains, minor light gray brown CLAYSTONE

2580 - 2670SHALE, dark gray-gray black, dark gray brown, medium gray, hard-moderately hard, massive-sub blocky, subfissile-platey, earthy texture, non-very slightly calcareous, rare calcite and dolomite micro fractures, siliceous in part, slightly micaceous, silty with some imbedded sand grains. Minor SILTSTONE, medium gray-gray brown, massive, hard-very firm, slightly calcareous, argillaceous, siliceous in part, rare micro pyrite

2670 - 2730SHALE, dark gray-gray black, dark gray brown, hard-occasionally firm, sub blocky-massive, brittle-platy in part, earthy texture, silty in part, micro micaceous, very finely disseminated pyrite and rare pyrite veining, generally non calcareous, trace gray brown soft earthy clay, coarse platy and blocky SHALE fragments to 15 mm

2730 - 2780SHALE, dark gray-gray black, hard-very firm, sub blocky-massive, platy-brittle in part, earthy-smooth texture, micro micaceous-phyllitic in part, very finely disseminated pyrite and micro pyrite concretions, rare calcite lined fractures, occasionally brecciated with chalky-crystalline calcite lenses, minor silty streaks and clay

2780 - 2830SHALE, dark gray brown-gray black, very dark gray, hard-moderately hard, slightly brittle-dense, sub blocky-massive, platy-splintery in part, earthy-smooth texture, non calcareous, very finely disseminated pyrite throughout, minor dark brown clay

2830 - 2950SHALE, gray black-dark gray, dark gray brown-medium brown, hard-moderately hard, brittle in part, massive-subfissile, earthy-smooth texture, silty in part, micro micaceous, generally non calcareous, trace calcite lined fractures, some pyrite veining and microcrystalline pyrite

2950 - 3060SHALE, dark gray brown-brown black, gray black, medium-dark brown, hard-moderately hard, brittle, occasionally soft grading to claystone, massive-sub blocky, earthy texture, silty in part, very finely disseminated pyrite, scattered mica, slightly-non calcareous, occasional calcite edges and fracture fill, trace free crystalline calcite and dense brown siliceous LIMESTONE, rare yellow fluorescence with dull yellow green residual ring cut

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

3060 - 3100SHALE, dark gray-gray black, dark gray brown, hard-occasionally brittle, massive-sub blocky, platy-splintery in part, generally earthy texture, silty in part, micro micaceous-occasionally phyllitic, very finely disseminated pyrite and rare pyrite concretions, slightly-moderately calcareous, occasionally brecciated with white calcite fracture infill, rare dark gray brown dense micro crystalline LIMESTONE fragments

3100 - 3160SHALE, very dark gray, dark gray brown-gray black, hard, dense, sub blocky-massive, occasionally splintery, earthy texture, micro micaceous-silty in part, rare pyrite veining, slightly-moderately calcareous, trace calcite lined fractures and gray brown dense silty LIMESTONE

3160 - 3300SHALE, dark gray brown-gray black, medium-dark gray, hard-firm, sub blocky-massive, earthy-micro micaceous, slightly-moderately calcareous, carbonaceous in part, calcite veins and fracture infilling, occasionally pyritic

3300 - 3360SHALE, dark gray-black, occasionally medium brown-gray brown, firm-hard, massive-sub blocky, earthy texture, moderately-very calcareous, numerous calcite crystals and veins, slightly carbonaceous, occasionally micro micaceous, rare pyrite. Minor SILTSTONE, medium-light brown, gray brown, thinly laminated, firm-soft, sub blocky-massive, argillaceous, very calcareous-limy

3360 - 3400SHALE, dark gray brown-black, sub blocky-fissile, firm-hard, earthy texture, micro micaceous, common calcite fracture fill, occasionally pyritic. Thinly bedded LIMESTONE, gray brown-light brown, mottled in part, microcrystalline, firm-soft, earthy-chalky texture, abundant clay, numerous calcite filled fractures, white chalky and crystalline calcite fragments, frequent thin SHALE partings, trace mineral fluorescence with dull yellow residual ring cut

3400 - 3444SHALE, gray black-black, dark gray brown-brown black, hard-brittle, moderately hard, platy-subfissile, sub blocky in part, earthy texture, moderately-very calcareous, numerous calcite filled and lined fractures, very finely disseminated pyrite and rare veins, micro micaceous, carbonaceous in part. Interbedded LIMESTONE, gray brown-medium brown, light brown-gray tan, dark brown, generally mottled, micro crystalline, earthy texture, moderately hard-soft, frequent calcite fractures, generally indurated with clay particles, stylolitic in small part, trace pyrite, rare slowly seeping milky yellow cut

Mississippian Joana Limestone Sample Top at 3444 feet

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

3444 - 3470LIMESTONE, light gray brown-buff , tan-cream, gray white, generally mottled, micro-trace very fine crystalline, firm-soft, chalky, occasionally hard, stylolitic in part, very fractured with calcite, trace dark brown-black CHERT, spotty moldic porosity, trace intercrystalline and very fine crystal rhomb porosity, trace bright yellow white fluorescence, faint slowly seeping cut. Minor SHALE, gray black-black, dark gray brown, massive-sub blocky, platy, moderately hard-hard, earthy, moderately-very calcareous, minor calcite edges and fracture fill, trace disseminated pyrite, scattered mica

3470 - 3500LIMESTONE, gray tan-light brown, buff, cream tan-white, dark brown, mottled, micro crystalline, firm-moderately hard, dense, stylolitic in part, some calcite filled and lined fractures, trace moldic-earthy porosity, trace yellow white fluorescence with weak flash cut and slowly seeping pale yellow cut. Trace CHERT, brown black-dark brown, hard, angular-blocky, trace calcareous inclusions, trace disseminated pyrite

3500 - 3550LIMESTONE, light gray brown-buff, medium-dark gray, cream-white, dark brown, generally mottled, micro-crypto crystalline, earthy-smooth texture, firm-hard, soft-marly in part, clean, very calcareous, abundant white chalky-translucent calcite fragments throughout, numerous calcite filled fractures, spotty bright yellow white fluorescence with weak yellow slowly streaming cut

3550 - 3600LIMESTONE, light gray-gray tan, medium-dark gray, mottled white-buff, micro-crypto crystalline, earthy-chalky texture, moderately hard-soft, occasionally hard-dense, generally brecciated with chalky-crystalline calcite, numerous calcite lined fractures and micro fractures, rare stylolites, scattered dull green mineral fluorescence, no cut, trace C1 and C2 gas readings

3600 - 3630LIMESTONE, light gray-gray tan, cream-buff, medium gray, slightly mottled, micro-crypto crystalline, earthy-subwaxy texture, hard-firm, brittle, occasionally soft-chalky, minor free crystalline calcite and fracture fill, rare fossil fragments and stylolites, 10% SHALE cavings in sample, Lost Returns at 3630 feet

3630 - 3700LIMESTONE, medium gray-gray brown, light gray-buff, gray tan, micro-crypto crystalline, earthy-smooth texture, hard-moderately hard, firm-brittle in part, dense, blocky, clean, very calcareous-slightly siliceous, rare pyrite, minor crystalline-chalky calcite, abundant LCM contamination, drilling with partial returns

3700 - 3750No Sample Shale Shakers Bypassed

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

3750 - 3800LIMESTONE, medium-light gray brown, dark brown, buff-tan, occasionally white, mottled, micro-cryptocrystalline with rare coarse crystals, hard-firm, occasionally soft-chalky, common fractures with calcite infilling. Trace SHALE, dark gray-black, sub blocky-platy in part, firm, micro micaceous, slightly-non calcareous, abundant LCM, very poor samples

3800 - 3870LIMESTONE, light-medium brown, gray brown, tan-cream, dark gray brown-dark brown, mottled in part, microcrystalline, hard-moderately hard, dense crystalline-slightly earthy in part, trace fossil pellets, stylolitic, numerous calcite filled and lined fractures, some free crystalline calcite, rare intercrystalline porosity, spotty bright yellow-dull orange fluorescence, very weak pale yellow cut. Minor SHALE, gray black-black, brown black, blocky-platy in part, hard-moderately hard, earthy texture, non-moderately calcareous, siliceous, trace pyrite veins and free crystalline pyrite, possible cavings. Trace SANDSTONE, medium-dark gray, very fine-fine grained, hard, clear-vitreous, slightly calcareous, siliceous-quatrzitic in part, trace pyrite, very poor samples, over 90% LCM

3870 - 3920LIMESTONE, medium brown-tan, light gray brown-gray tan, slightly mottled, micro crystalline, hard-firm, trace stylolites, some free chalky and crystalline calcite, rare bright yellow white mineral fluorescence, no cut. Minor SHALE, very dark gray-medium gray, gray brown-gray black, sub blocky, moderately hard-firm, earthy-occasionally glossy texture, dense, very slightly-non calcareous, trace calcite lined fractures, scattered micro pyrite, silty, apparent SILTSTONE and SANDSTONE stringers, trace light gray green-white speckled CHERT, very poor samples with 95% LCM contamination. Spot 2 Form-a-Seal pills and 150 bbl cement plug at 3870 feet; Spot second cement plug at 3918 feet

3920 - 3950SHALE, dark gray, black, occasionally light gray brown, firm-hard, subfissile-blocky, non calcareous, earthy, dense, rare pyrite. Trace SANDSTONE, light-dark brown gray, dark gray, fine-very fine grained, occasionally silty, moderately sorted, sub angular, trace calcareous cement. Interbedded LIMESTONE, tan-light gray brown, mottled in part, micro-cryptocrystalline, firm, argillaceous-chalky, trace white calcite crystals, abundant Lost Circulation Material, trace cement with coal fragments after squeeze job at 3918 feet

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

3950 - 3990LIMESTONE, medium-dark gray, dark brown-gray brown, slightly mottled, micro crystalline, earthy-dense crystalline texture, hard-moderately hard, occasionally brittle, clean, very calcareous-slightly dolomite, crystalline calcite lined fractures, spotty dull green-yellow orange fluorescence with slowly streaming cut, poor sample quality. Minor SHALE, dark gray-dark gray brown, medium gray, gray black, moderately hard, sub blocky, earthy texture, slightly phyllitic, non-very slightly calcareous, silty in part with imbedded sand grains, trace calcite filled fractures, slightly micaceous, very finely disseminated crystalline pyrite, rare pyrite veins, trace SANDSTONE and cherty conglomeratic fragments, abundant LCM

Devonian Pilot Shale Sample Top at 3990 feet

3990 - 4040SHALE, dark gray brown-gray black, medium-dark gray, hard-moderately hard, brittle, sub blocky-fissile, splintery in part, earthy texture, smooth-silky in part, occasionally phyllitic, micro micaceous-silty, slightly-non calcareous, carbonaceous in part, trace micro pyrite crystals and nodules, pyrite concretions and veining, minor fine grained hard siliceous SANDSTONE, rare calcite lined fractures, trace gray-brown dense micro crystalline LIMESTONE, abundant LCM contamination, drilling with partial returns

4040 - 4120SHALE, dark gray, dark gray brown-gray black, medium gray, massive-sub blocky, earthy texture, dense in part, moderately hard, non-slightly calcareous, trace disseminated pyrite, silty in part, rare calcite filled fractures, some dark-medium gray fine grained SANDSTONE with pyrite and cherty inclusions. Interbedded LIMESTONE, medium-light gray brown, light brown, slightly mottled, micro crystalline, earthy texture, smooth-sub vitreous in part, rarely micro sucrosic, hard-moderately hard, trace calcite filled fractures and free crystalline calcite, trace stylolites, rare micro pyrite, spotty dull yellow green mineral fluorescence, no cut, very poor sample volume, 95% Lost Circulation Material, hole surging with partial to no returns

4120 - 4160SHALE, medium-dark gray, gray brown-olive tan, light gray-light gray green, trace redish brown, moderately hard-hard, sub blocky-fissile, massive, earthy-waxy texture, moderately-slightly calcareous, scattered free crystalline calcite, minor LIMESTONE, very finely disseminated pyrite and veining, bentonitic in part, trace dull yellow orange fluorescence with very slow pale yellow seeping cut, very poor sample quality. Spot third cement plug at 4125 feet. Aerate mud through parasite string and drill pipe at 750 to 1500 cfm. Begin making water from formation, reserve pit over-flowing

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

4160 - 4230SHALE, medium-dark gray, medium brown, gray brown-olive, gray green, abundant black SHALE cavings, hard-moderately hard, brittle in part, sub blocky-fissile, earthy texture, occasionally silty-sandy, calcareous in part, rarely bentonitic-tuffaceous, scattered mica, poor sample quality, very fine cuttings. Interbedded LIMESTONE, light gray-buff, medium-light brown, gray brown-dark brown, mottled gray white, micro-crypto crystalline, earthy texture, dense crystalline-micro sucrosic in part, moderately hard-brittle, very calcareous-slightly dolomitic, rare yellow tan pelletal fossil fragments, trace calcite lined fractures, slightly argillaceous in part, some chalky white-light green BENTONITE, trace dull green mineral fluorescence, no cut, abundant LCM

4230 - 4250LIMESTONE, gray brown, medium-light brown, mottled dark brown-cream, tan-reddish brown, buff, micro-crypto crystalline, earthy-smooth texture, moderately hard-brittle, occasionally hard-dense, argillaceous-slightly dolomitic in part, some white crystalline calcite inclusions, numerous fossil fragments and tan-orange pellet clusters, yellow-orange fluorescence with spotty yellow slowly streaming cut, numerous rounded SHALE and LIMESTONE cavings with Hi-Vis LCM sweep

4250 - 4280SHALE, medium-dark gray, dark gray brown, light gray-light brown, hard-very firm, brittle in part, sub blocky-fissile, earthy-smooth texture, silty-sandy in part, trace pyritic SANDSTONE with minor CHERT, trace white chalky BENTONITE, moderately-non calcareous, very finely disseminated pyrite, rare crystalline pyrite concretions and veining. Interbedded LIMESTONE, medium-dark brown, gray brown-buff, medium gray, mottled light brown-gray white, micro-crypto crystalline, earthy-smooth texture, micro sucrosic-vitreous in part, moderately hard-brittle, numerous calcite filled fractures and white crystalline calcite, rare pelletal fossil fragments, yellow-orange mineral fluorescence, spotty bright yellow slowly streaming cut

4280 - 4300 Reduce Air Flow - Lost All Returns - No Sample

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

4300 - 4380LIMESTONE, tan-gray tan, light gray-cream, light-dark brown, slightly mottled, micro-trace very fine crystalline, moderately hard-friable, hard in part, earthy-micro sucrosic, abundant loose crystalline and chalky calcite, some calcite filled and lined fractures, rare stylolites, occasionally fossiliferous, scattered pyrite nodules, spotty yellow green-rare bright yellow white fluorescence, weak milky yellow cut. Interbedded SHALE, dark gray-dark gray brown, olive brown-yellow gray, gray black, trace light reddish brown, massive-sub blocky, subfissile, earthy-waxy texture, hard-very firm, moderately-non calcareous, siliceous in part, trace disseminated-very fine crystalline pyrite, rare pyrite veins, bentonitic in part with yellow orange mineral fluorescence. Trace SANDSTONE, light gray-gray green, medium gray, gray brown, very fine-fine grained, moderately sorted, sub angular-rounded, clear-slightly frosted, hard-moderately hard, calcareous cement, silty in part, rare cherty conglomeratic fragments, very poor samples, abundant LCM. Run wireline logs at 4380 feet

4380 - 4420SHALE, dark gray-dark gray brown, medium brown, gray black, trace orange brown, sub blocky-subfissile, earthy-occasionally glossy texture, hard-very firm, slightly-non calcareous, carbonaceous in part, trace calcite fracture fill, scattered micro crystalline pyrite, rare pyrite veining, occasional light gray bentonite mottled with black shale. Interbedded LIMESTONE, light brown-gray tan, light gray-gray white, cream, slightly mottled, micro-crypto crystalline, earthy texture, hard-very firm, scattered free crystalline calcite, minor calcite filled and lined fractures, rare yellow brown fossiliferous fragments, trace yellow green fluorescence with milky yellow cut. Trace SANDSTONE, medium-dark gray, light gray, moderately-poorly sorted, very fine-trace coarse grained, clear-opaque, hard, siliceous-slightly calcareous, carbonaceous inclusions, very finely disseminated pyrite, mottled dark brown and blue gray to black CHERT

4420 - 4460LIMESTONE, light-medium brown, light gray-gray tan, cream-pinkish tan, light gray green, mottled, micro-crypto crystalline, rarely very fine-fine crystalline, earthy-occasionally sucrosic texture, dense crystalline-pearly in part, moderately hard-brittle, abundant loose crystalline calcite and fracture fill, increase micro-very fine crystalline pyrite, trace fossil fragments and pellets, rare stylolites, trace yellow white fluorescence with pale yellow slowly seeping cut. Minor SHALE, dark gray-dark gray brown, gray black, light gray, gray green, sub blocky-massive, subfissile, earthy texture, hard, dense, slightly-moderately calcareous, scattered pyrite, occasionally silty grading to SILTSTONE

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

4460 - 4510LIMESTONE, light-dark brown, light gray-gray tan, cream-gray white, light orange brown, gray green, mottled, micro-crypto crystalline, trace very fine-fine crystalline, hard-moderately hard, blocky, earthy-sub vitreous texture, trace pyrite, rare intercrystalline porosity with very fine crystalline rhombs, spotty faint white fluorescence, poor slowly seeping cut. Interbedded SHALE, dark gray-gray black, dark gray brown-medium brown, light gray-gray green, sub blocky-subfissile, hard-very firm, earthy texture, slightly-non calcareous, siliceous in part, scattered pyrite, minor SILTSTONE and SANDSTONE stringers, some gray black fine-very coarse Chainman SHALE cavings

4510 - 4570LIMESTONE, gray brown, medium-dark brown, light-dark gray, occasionally mottled with white crystalline calcite, micro-very fine crystalline, earthy texture, micro sucrosic-dense crystalline in part, hard-occasionally brittle, very finely disseminated pyrite, trace intercrystalline porosity, numerous crystalline-chalky calcite fractures, spotty dull green-bright yellow fluorescence with weak milky yellow cut, abundant LCM contamination. Minor SHALE, dark gray brown-dark gray, medium gray-gray green, dark brown, hard-very firm, subfissile-massive, earthy-waxy texture, sandy in part with very fine-medium grained SANDSTONE, scattered pyrite and rare pyrite veining, trace greenish white BENTONITE with bright yellow-dull green mineral fluorescence, some hard siliceous-sandy TUFF fragments

4570 - 4610SHALE, dark gray brown-very dark gray, trace medium gray-gray green, hard, firm-brittle in part, massive-sub blocky, earthy texture, smooth-silky in part, micro micaceous-rarely phyllitic, slightly-non calcareous, silty in part, trace poorly sorted SANDSTONE with dark SHALE inclusions, rare crystalline pyrite clusters, abundant coarse SHALE and LIMESTONE fragments

4610 - 4630SHALE, dark gray brown, dark gray-gray black, hard-moderately hard, massive-sub blocky, earthy texture, silty in part, generally non calcareous, micro micaceous, trace very finely disseminated pyrite, silty-sandy in part with minor SANDSTONE streaks. Trace LIMESTONE, light-dark brown, gray brown, light gray-white, slightly mottled, micro-crypto crystalline, earthy-dense crystalline texture, hard-moderately hard, calcite lined fractures and free crystalline calcite, trace dull green mineral fluorescence, no cut

4660 - 4730Reduce Air Flow Lost All Returns - No Sample

Devonian Guilmette Formation Sample Top at 4733 feet

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

4733 - 4750LIMESTONE, gray brown, medium-dark brown, light-dark gray, buff, mottled in part, predominantly dense micro crystalline, earthy-micro sucrosic texture, hard-moderately hard, very calcareous-slightly dolomitic, numerous chalky-crystalline calcite fractures, rare stylolites, no visual show. Abundant SHALE, dark gray brown-gray black, dark gray, hard-moderately hard, sub blocky-massive, brittle-platy in part, earthy texture, very slightly-non calcareous, scattered mica, rare pyrite concretions, silty in part, occasionally banded with SILTSTONE and SANDSTONE streaks

4750 - 4800LIMESTONE, dark brown-gray brown, medium-light brown, gray black, buff, occasionally mottled, micro crystalline, hard-brittle, moderately hard, blocky-platy, dense crystalline-micro sucrosic texture, occasionally earthy-chalky, some calcite filled and lined fractures, rare stylolites, slightly dolomitic in part, no fluorescence, no cut

4800 - 4870DOLOMITE, medium-light brown, dark gray brown, light-medium gray, micro-trace very fine crystalline, micro-very finely sucrosic, vitreous in part, hard-brittle, sub blocky-platy, moderately calcareous, frequent white dolomite filled and lined fractures, trace free crystalline calcite, rare micro crystalline pyrite, poor-fair intercrystalline porosity, trace vuggy porosity and crystal rhombs, occasional yellow green-yellow white fluorescence with pale yellow streaming cut. Minor LIMESTONE, medium-dark brown, light brown-gray brown, slightly mottled, crypto-micro crystalline, micro sucrosic-earthy texture, hard-moderately hard, trace stylolites, trace calcite fracture fill with dull yellow-white fluorescence, no cut

4870 - 4930DOLOMITE, medium-dark gray brown, medium brown-tan, mottled in part, micro-very fine crystalline, hard-brittle, dense crystalline-micro sucrosic texture, numerous white dolomite filled and lined fractures, trace calcite inclusions and fracture fill, rare micro crystalline pyrite, trace brown black silty SHALE, trace-poor intercrystalline and pinpoint vug porosity, rare light yellow fluorescence with slowly seeping pale yellow cut. Minor LIMESTONE, light-medium brown, cream-tan, light gray green-white, slightly mottled, micro crystalline, hard-moderately hard, earthy-dense crystalline texture, occasional calcite inclusions and fracture fill, fossiliferous in part, rare dark gray brown cherty conglomerate with pyrite, trace yellow orange mineral fluorescence, no cut

4980 - 5000DOLOMITE, gray brown, medium-dark brown, dark gray, gray tan-buff, micro-very fine crystalline, micro sucrosic-dense crystalline texture, hard-moderately hard, argillaceous in part, minor dark gray SHALE with crystalline pyrite inclusions, rare dark mineral streaks and stylolites, trace clear vitreous medium-coarse crystalline rhombs, rare dolomite and calcite lined fractures with spotty bright yellow fluorescence and faint milky yellow cut, trace LIMESTONE

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

5000 - 5080DOLOMITE, medium-dark brown, dark gray-gray brown, occasionally mottled gray white, micro-very fine crystalline, hard, dense crystalline-micro sucrosic, generally tight, trace calcite filled fractures, rare white crystalline dolomite rhombs and fracture fill, some intergranular and micro vuggy porosity, no visual show. Minor LIMESTONE, medium-light brown, gray brown, light gray-buff, gray green, mottled in part, micro-crypto crystalline, earthy-micro sucrosic texture, hard-moderately hard, slightly dolomitic-very calcareous, fossiliferous in part, rare micro pyrite, spotty bright yellow fluorescence with yellow green slowly streaming cut, some rounded SHALE cavings

5080 - 5130DOLOMITE, gray brown-dark gray, medium-dark brown, light gray-gray tan, micro-very fine crystalline, hard-dense crystalline, occasionally friable, micro sucrosic, rarely fine crystalline with good intergranular and vuggy porosity, some fine-medium crystal lined vugs and fractures, slightly-moderately calcareous, siliceous in part, rare pyrite streaks, no fluorescence, no cut, some earthy LIMESTONE with dull green-orange mineral fluorescence

5130 - 5160DOLOMITE, dark gray-gray brown, medium-dark brown, gray black, light brown-gray white, micro-fine crystalline, micro sucrosic-dense crystalline texture, hard-occasionally brittle, argillaceous-siliceous in part, rare micro pyrite concretions, rare vugs lined with white medium-coarse crystalline dolomite rhombs, minor fractures, trace dull orange-light yellow fluorescence, no cut, abundant LCM contamination

5160 - 5240DOLOMITE, medium-dark brown, gray brown-gray black, medium gray-light brown, predominantly micro-very fine crystalline, micro sucrosic-dense crystalline texture, hard-occasionally brittle, siliceous with rare translucent gray cherty inclusions, very finely disseminated pyrite, numerous white coarse crystalline dolomite and calcite lined vugs and fractures, rare fragments with good intergranular porosity, no visual show. Minor LIMESTONE, light gray-gray brown, buff, light-medium brown, cream-white, mottled in part, micro-crypto crystalline, earthy texture, smooth-vitreous in part, hard-very firm, brittle, very calcareous-slightly dolomitic, minor crystalline-chalky calcite fractures, free white crystalline calcite, trace dull green-orange mineral fluorescence, no cut

5240 - 5300DOLOMITE, dark brown-gray black, gray brown-dark gray, medium-light brown, mottled gray white, micro-very fine crystalline, dense crystalline-micro sucrosic texture, hard-occasionally brittle, siliceous-argillaceous in part, trace dark gray SHALE inclusions, rare micro pyrite, generally tight, minor white crystalline dolomite and calcite lined vugs and fractures, no fluorescence, no cut, abundant LCM contamination

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

5300 - 5350DOLOMITE, medium brown-dark gray, light brown-gray brown, gray black, light gray, mottled in part, micro-very fine crystalline, micro sucrosic-dense crystalline texture, hard-moderately hard, brittle, trace dolomite and calcite filled fractures, siliceous in part, occasional light gray-cream tan LIMESTONE contacts, some dark gray-gray black SHALE, trace intercrystalline and vuggy porosity, rare crystalline rhombs, trace dull yellow green fluorescence, no cut

5350 - 5420DOLOMITE, medium-light brown, dark gray brown, light gray-gray tan, slightly mottled, trace black mineral banding, micro-very fine crystalline, micro sucrosic texture, dense, hard, moderately hard-brittle, moderately calcareous, some dolomite filled fractures, trace medium gray fine grained SANDSTONE with pyrite, poor intercrystalline and pinpoint vug porosity, trace fine-coarse crystalline rhombs, trace yellow green fluorescence, no cut. Minor LIMESTONE, medium-light brown, light gray-cream, buff, light gray green, slightly mottled, micro-crypto crystalline, hard-blocky, smooth-dense crystalline texture, moderately hard-earthy in part, some calcite lined fractures and free crystalline calcite, rare pyrite veining, trace faint white mineral fluorescence

5420 - 5480DOLOMITE, medium-dark brown, gray brown-gray black, light brown-gray tan, slightly mottled, micro-very fine crystalline, hard-brittle, sucrosic-dense crystalline texture, white dolomite and calcite filled fractures, scattered pyrite, rare intergranular porosity, trace pinpoint and vuggy porosity, scattered dolomite rhombs, trace brown-cream earthy LIMESTONE, minor yellow green fluorescence with no cut

5480 - 5550DOLOMITE, dark brown-dark gray brown, medium-light brown, very light gray-buff, micro-very fine crystalline, hard-moderately hard, brittle, sub blocky, micro sucrosic-dense crystalline texture, trace-poor intercrystalline porosity, scattered dolomite rhombs and fracture fill, yellow mineral fluorescence, no cut. Minor LIMESTONE, light brown-cream tan, medium-dark brown, light gray green, micro-cryptocrystalline, hard-moderately hard, earthy-smooth texture, trace calcite lined fractures and free crystalline calcite, tuffaceous in part with rare imbedded dark brown fine-medium grained dolomite crystals, trace dull yellow fluorescence

5550 - 5590DOLOMITE, light gray-light brown, medium-dark brown, gray brown-dark gray, micro-very fine crystalline, dense crystalline-micro sucrosic, hard, blocky, occasionally brittle-platy, rarely friable fine crystalline with sucrosic-vuggy texture and fair intergranular porosity, minor fractures, rare pyrite, siliceous in part, slightly calcareous, trace earthy LIMESTONE, decreasing yellow-green mineral fluorescence, no cut

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

5590 - 5630DOLOMITE, dark gray-gray brown, medium-dark brown, gray tan, light-medium gray, micro-very fine crystalline, micro sucrosic-dense crystalline texture, hard-occasionally brittle, siliceous in part, trace dark gray SHALE, rare pyrite concretions, minor gray cherty inclusions, generally tight, trace micro vugs and dolomite filled fractures, some translucent white dolomite crystals, scattered yellow-green mineral fluorescence, no cut

5630 - 5640DOLOMITE, medium-dark brown, gray brown-dark gray, light gray-tan, predominantly micro crystalline, dense crystalline-micro sucrosic texture, earthy in part, hard, moderately hard-brittle, slightly-moderately calcareous, argillaceous-siliceous in part, minor dark gray SHALE, rare pinpoint vuggy porosity, trace white crystalline dolomite fill fractures, rare bright yellow fluorescence with milky white-bright yellow slowly streaming cut

5640 - 5650DOLOMITE, dark gray brown, medium-dark brown, gray tan-medium gray, micro crystalline, some fine-very fine crystalline, micro sucrosic-earthy texture, hard-dense, rare micro pyrite, siliceous in part, trace gray-black CHERT, scattered gray white-light green TUFF fragments, trace white crystalline dolomite with calcite filled vugs and fractures, rare light brown-pink orange stain, spotty bright yellow-gold fluorescence with good bright yellow streaming cut, about 5 percent of sample shows fluorescence

5650 - 5670Reduce Air Flow Lost All Returns - No Sample

5670 - 5690DOLOMITE, gray brown-dark brown, dark gray, medium-light brown, light-medium gray, micro crystalline, fine-very fine crystalline in part, micro sucrosic-occasionally vitreous texture, hard-dense, siliceous in part, scattered pyrite, trace light green-white TUFF, rare fractures and vugs lined with white-pink crystalline dolomite, trace light brown-pink stain, spotty yellow-gold fluorescence with weak milky yellow cut in 5 percent of sample

5690 - 5710DOLOMITE, dark gray-gray brown, dark brown-light brown, medium-light gray, micro-very fine crystalline, dense crystalline-micro sucrosic texture, earthy in part, hard-occasionally brittle, slightly-moderately calcareous, siliceous in part, interbedded dark gray SHALE with pyrite veining, very finely disseminated pyrite, trace white crystalline dolomite and free calcite crystals with rare pinkish brown stain, spotty yellow-gold fluorescence with faint yellow green cut

5710 - 5740DOLOMITE, gray brown-medium brown, light-dark gray, dark brown, micro-occasionally fine crystalline, dense crystalline-micro sucrosic, hard, brittle-friable in part, rare intergranular porosity, scattered vugs lined with medium-coarse crystalline rhombs, rare yellow-green fluorescence with pink stain and milky yellow slowly streaming cut

Formation tops

Sample Interval

(in feet)

SAMPLE DESCRIPTION

5740 - 5770DOLOMITE, dark gray brown, medium-dark brown, dark gray-gray black, micro-very fine crystalline, predominantly micro sucrosic, hard-dense, siliceous in part, scattered pyrite, trace earthy LIMESTONE, rare white crystalline dolomite lined vugs and fractures, trace bright yellow-green fluorescence, no cut

5770 - 5810DOLOMITE, dark gray-dark gray brown, medium-light brown, cream tan-light gray, micro-dense crystalline, very fine crystalline, micro sucrosic-earthy texture, hard, siliceous in part, some dark gray-brown black SHALE, trace white crystalline calcite and dolomite lined fractures, trace-poor intercrystalline and pinpoint vug porosity, occasional bright yellow fluorescence with faint yellow slowly seeping cut

5810 - 5860DOLOMITE, medium-dark brown, light gray-gray brown, cream-buff, gray white, occasionally mottled, micro-very fine crystalline, hard-brittle, dense, frequent white calcite crystals, minor calcite and dolomite lined fractures, trace pyrite, minor light brown-white earthy cryptocrystalline LIMESTONE, trace-occasionally fair intergranular and pinpoint vug porosity, scattered fine-coarse rhombs, trace yellow orange-rarely bright yellow fluorescence, trace light tan staining with faint yellow cut

5860 - 5900DOLOMITE, medium-light brown, dark brown-gray brown, light gray, tan-cream, micro-occasionally fine crystalline, micro sucrosic, hard-moderately hard, brittle-platy in part, occasional dolomite filled fractures, rare light gray-clear CHERT with pyrite inclusions, scattered indistinct black-dark brown veins, some intercrystalline and fracture porosity, trace dull yellow fluorescence, no cut. Minor SHALE, dark gray-brown black, medium gray, massive-sub blocky, platy in part, hard-moderately hard, earthy-subwaxy, slightly-non calcareous, trace disseminated pyrite and thin veins, siliceous-dolomitic in part

5900 - 5940DOLOMITE, light-dark brown, dark gray brown, cream tan-buff, light gray, micro-very fine crystalline, hard-brittle, micro sucrosic-dense crystalline texture, argillaceous in part, some medium gray-gray black SHALE, minor light-dark brown LIMESTONE, trace calcite filled and lined fractures, trace intercrystalline and micro vuggy porosity, scattered very fine-coarse grained dolomite rhombs, rare bright yellow fluorescence with no cut

5940 - 6000DOLOMITE, medium-dark gray brown, tan-light gray, light brown, slightly mottled, micro-very fine crystalline, hard-brittle, dense in part, some free white-clear dolomite crystals, trace disseminated pyrite, minor dark brown-gray black pyritic SHALE, trace-nil intercrystalline porosity, faint white mineral fluorescence, no cut. Trace LIMESTONE, dark brown-light brown, light gray, micro-cryptocrystalline, dense-smooth texture, hard-blocky, very firm-earthy in part, trace crystalline calcite edges

GEOLOGICAL SUMMARY & CONCLUSIONSPlains Exploration and Production Company spudded the Pancake Summit Well 21-1 in White Pine County, Nevada, on the 16th of March 2007 with Ensign Rig #82. The 14 inch surface hole was drilled out from conductor pipe with fresh water in a dark gray brown silty shale, interpreted as the upper part of the Diamond Peak Formation. The signature sandstone and conglomerate interval of the Diamond Peak was encountered at 1150 feet, and the Mississippian Chainman Shale came in at a sample top of 1480 feet. The hole was logged, and 9 5/8 inch surface casing was set at 1572 feet on March 24. The drilling fluid in the 8 inch hole was a gel mud aerated at 750 cfm through a parasite string at the casing shoe.The Chainman Shale consisted of dark gray brown to black brittle marine shales with minor pyrite, mica and carbonaceous material. The upper portion was interbedded with streaks of poorly sorted sandstone and siltstone, while limestone interbeds marked the base of the formation. Hole inclination soon built to 10 degrees, and at 2150 feet a VertiTrak motor was utilized to control deviation. No other drilling problems were encountered here.The sample top for the Mississippian Joana Limestone was at 3444 feet. It consisted primarily of light gray, brown and buff earthy fossiliferous limestone with an abundance of calcite lined fractures. Some spotty yellow fluorescence with a weak solvent cut were observed near the top of the formation, with small amounts (100 ppm) of methane and ethane. The wellbore lost returns at 3630 feet, and gas readings were compromised for the remainder of the well. Surging fluid levels and jetted air from the flowline would diminish any potential shows. Later, the air and drilling fluids were diverted through the gas buster. At 3870 feet, two Form-a-Seal pills were spotted in an unsuccessful attempt to regain circulation. Then a 150 bbl cement plug was set, and a second cement plug was spotted at 3600 feet after drilling to 3918 feet. Drill cuttings became heavily contaminated with lost circulation material and Chainman Shale cavings. At 4100 feet, air was rigged up to the standpipe and circulated through the bit as well as the parasite string. At 4125 feet a third cement plug was spotted, and drilling proceeded with partial-to-no returns. The wellbore would alternately take fluid and make water, soon over-filling the reserve pit.The Devonian Pilot Shale was picked at 4008 feet in a limestone / shale sequence near the base of the relatively clean Joana Limestone. Sample quality was poor, but some spotty fluorescence with milky yellow cut was observed in the brown microcrystalline limestone fragments. The dark gray brown silty Pilot shales became more prominant around 4570 feet. Air to the bit was shut off at 4660 feet in an attempt to dispose of excess water down the wellbore, and drilling proceeded without returns. A bit trip was made at 4731 feet before regaining circulation. While reaming to bottom, the hole packed off at a bit depth of 4577 feet; the drill string was stuck for 10 hours before coming free.GEOLOGICAL SUMMARY & CONCLUSIONS (CONT.)The top of the Devonian Guilmette Formation was picked at 4733 feet. The upper limestone was dark gray brown, dense microcrystalline to earthy with minor calcite lined fractures. By 4800 feet the lithology was predominantly a medium to dark brown dolomite with micro-sucrosic texture. White coarse-crystalline dolomite rhombs and partially filled vugs indicated fair porosity over much of the interval. Visual shows were spotty and rare, with less than 5 percent fluorescence in any given sample. Most trays had no fluorescence or cut, despite fairly good vuggy porosity. The best visual shows were from 5630 to 5740 feet, with pinkish brown staining, spotty bright yellow to gold fluorescence and a bright yellow streaming cut. Again, this occurred in about 5 percent of the sample fragments, and the better porosity rarely exhibited any oil show.A total depth of 6000 feet was reached at 01:00 on April 18, 2007. Wireline logs were attempted, but tagged at 2290 feet. A wiper trip was necessary to clean the hole, and subsequent logging runs went to bottom without incident. The Sonic tool failed, but the Nuetron/Density, Resistivity and Imaging/Dipmeter logging runs were all successful. On April 20th the decision was made to plug and abandon.

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Pancake Summit 21-1 Geo Report (2)

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