1

Dy. C. C. (D) ------- DGM-Chemical (Ops.) ------- File

CHEMICAL DEPARTMENT

Well History Related To Chemical Activity

WELL NO: NHK#639

AREA: South Kathalguri

LOC:HYS

(Dipankar Dutta) (Ishani Goswami)

Senior Chemist Chemist (P.O.)

Rig S-6

Type of well Exploratory J-bend

Planned Depth 3082m

Drilled Depth 3085m

Spudding –in date 25th

Jan, 2017

No of days from spud in to

rig down 66 days

Date of Rig down 31st Mar, 2017

Status of Well at the time of

Rig Down Natural Gas Producer

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CONTENTS i. Highlights of the well

ii. Casing Diagram of the well

iii. Brief well completion report

iv. Oil string stage - Trip information sheet

v. Well summary

vi. Chronology of events

vii. Chemical Consumption & Cost analysis

viii. Mud Summary

ix. Mud Parameters

x. Mud Hydraulics

xi. Pipe stuck report

xii. Caliper log

xiii. CBL-VDL log snapshots

xiv. Deviation Profile of the well/Course of the hole

xv. Days Vs Depth plot

xvi. Depth Vs Mud Weight curve

xvii. Cementing Reports

xviii. Well Policy

xix. Lab test reports

xx. Any other reports

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HIGHLIGHTS LOC-HYS, RIG NAME- S6

WELL NO: NHK#639

AN EXPLORATORY J-BEND 3CP WELL.

DATE OF SPUDDING: 25.01.2017.

DRILLED DEPTH: 3085 M MD.

SUCCESSFULLY ACHIEVED MAXIMUM DRIFT ANGLE OF 45DEG IN A J-BEND

WELL FOR THE FIRST TIME IN OIL.

TOTAL DRILLING COST INCURRED IN THE WELL WAS Rs 5870559.17 AND COST

PER METER OF THE WELL WAS FOUND TO BE Rs 1902.937.

DRILLING OF THE WELL WAS COMPLETED IN 46 DAYS WITH OIL STRING

STAGE DRILLING TERMINATION TIME OF 24 DAYS.

WHILE REAMING KELLY LENGTH OBSERVED TIGHT PULL @ 2691M AND

STRING GOT STUCK, FREED THE SAME WITHIN 06 HRS BY OIL SPOTTING.

LOGS RECORDED IN ISOLATION STAGE:

o ACRT-SP-GR-SDL-DSN-CALI-BSAT-IDT

LOGGER’S DEPTH RECORDED AS 2112M & BHT 1350F.

LOGS RECORDED IN OIL STRING STAGE:

o PEX-HRLA-GPIT

o LOGGING TOOL GOT HELD UP AT 2958M, RECORDED BHT 79.90C.

o CBL-VDL-GR-CCL-CAST

CALIPER ANALYSIS OF THE WELL SHOWS THAT THE HOLE FOR OIL STRING

SECTION WAS 46.4% WITH UPTO HOLE SIZE 10.5”.

PRODUCTION SET HYDRAULIC PACKER @2775.21M

SLB PERFORATED THE WELL IN THE RANGE 2848-2854M. NO IMMEDIATE

PRESSURE BUILD UP WAS OBSERVED.

UNLOADED 133 BBLS (CUMULATIVE) OF WELL FLUID ACCOMPANIED BY GAS.

SHUT IN WELL AND FOUND MORNING SITP=1300 PSI & SICP=550PSI.

STATUS OF WELL AT THE TIME OF RIG DOWN: WELL IN SHUT IN CONDITION

TOTAL NO. OF DAYS REQUIRED FROM SPUD-IN TO RIG DOWN: 66 DAYS.

DATE OF RIG DOWN: 31.03.2017

DATA ENTERED IN THE DATABASE: YES

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5

WELL COMPLETION REPORT LOC: HYS, RIG: S-6 (NHK # 639)

1. INTRODUCTION & GEOLOGICAL PROSPECTS:

The exploratory location HYS lies towards south - west of the recently drilled well NHK-

626 (Loc. HXC) in the South-Kathalguri structure. The location is planned to be drilled as a

deviated (J-bend) well from an existing plinth of NHK-588 (Loc. HSY) to probe hydrocarbon

prospects within Upper Tipam reservoirs. Structurally, this location is expected to be around 20 m

up-dip with respect to the well NHK-626 (Loc. HXC) at Tipam-40 Sand top level. Neighboring well

NHK-626 (Loc. HXC) is presently producing gas @ 25,000 scumd through 6 mm bean with an

FTHP: 60 Kg/cm2 from 2357 m Upper Tipam Sand.

The objective depth of the well was: 3082 m MD/ 2450 m TVD.

2. CONDUCTOR STAGE:

Hole Size: 17 ½ inch

Interval: (0-156) m

The well was spudded on 25.01.2017 and 17 ½ inch conductor stage of the well was drilled

down to 156m. The hole was then cleaned thoroughly and cased with 13 3/8 inch casing with shoe

at 154.47m. It was then cemented using 700 sacks of API Class-G N.S. Dalmia cement of average

slurry density 113.15pcf on 27.01.2017.

2.1 FLUID DISCUSSION

2.1.1 Mud Type: Spud mud

For the conductor stage (17 ½” hole) drilling, a (7-8) % Bentonite suspension that was pre-

hydrated for effective functioning with a density of 66pcf was used. MF viscosity was generally

controlled at around 65 sec/quart. The spud mud was tailored without any inhibition.

Property Programmed Actual

Density (pcf) 66-67 66

MF Viscosity (sec/ quart) 60-55 65

2.1.2 Rheology & API Fluid loss:

At these maintained values of Mud Weight and MF Viscosity, an adequate hole cleaning

was achieved without observing any problem while drilling. As a precautionary measure, Hi-

Viscous pills were pumped for aiding towards effective hole cleaning. For this section API fluid

loss does not have any significant role towards the stability of the hole. No fluid loss control

additives were incorporated in the mud system.

2.1.3 Solids control:

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The solid control equipment consisted of two double decker Shale Shakers of screen sizes 16X16

mesh each, Desander having two nos of functional cones and Desilter containing 20 nos of

functional cones. The functioning of all solid control equipment was satisfactory. The sand trap tank

was dumped as and when required for effective solids removal from the system.

3. ISOLATION STAGE:

Hole Size: 12 ¼ inch

Interval: (156-2112) m

After allowing the cement to set and necessary well head hook-up, arrangement was made

for running in 12 ¼” new bit. Ran in bit and tagged cement top at 138m. Cleaned cement and drilled

down fresh formation down to 174m (KOP). After circulating and conditioning mud, the bit was

pulled out of the hole and the same bit was lowered with new M/s Almansoori deviation BHA.

Circulated and drilled down to 467m. During drilling, there was a leakage observed in standpipe

vibrating hose hammer union. The problem was attended and rectified by keeping the bit inside

casing shoe. The 12 ¼” hole was further drilled down to 962m. The bit was pulled out of the hole

(PO bit condition: T2B2G1/8) and ran in new 1-1-7 TCR bit. The hole was then drilled down to

isolation stage target depth of 2112m using two more TCR bits.

Circulated & conditioned mud system and a free wiper trip were made upto 697m. Pulled

the bit out of the hole. Made a hole probing trip with two stabs @ 0m and 10m prior to OH survey.

POOH bit with PO bit condition of T3B2G1/4. WLD recorded ACRT-SP-GR-SDL-DSN-CALI-

BSAT-IDT log in the range 2112m-140m. Loggers’ depth=2112m & BHT=135 deg F. Made a hole

probing trip with stiff hook-up prior to casing lowering. Lowered 9 5/8-inch casing and landed with

shoe at 2108.38m and float collar at 2095.75m. The casing was then cemented on 15.02.2017 using

2300 Sacks of Class-G NS Dalmia cement with average slurry densities of 101.6pcf and 113.75pcf

for Lead and Tail slurries, respectively. The cement slurry was displaced with 440bbl of 68pcf mud.

Plug bumped @4397 stks against calculated 4234stks with bumping pressure of 1950psi

(Eff=96.3%). Return slurry surfaced density 104pcf. BPV holding was found Ok. WOC.

3.1 FLUID DISCUSSION

3.1.1 Mud Type: BS-CMC Mud System

The mud from the previous section was pretreated for possible cement contamination with

sodium bicarbonate and used for drilling of this section. The mud density and MF Viscosity were

maintained in the range of 67-68pcf and 50-60 sec respectively.

3.1.2 Rheology & API Fluid Loss:

The Rheological and fluid loss properties were maintained by incorporating CMC(HVG),

CMC(LVG) and PAC(R). Linseed Oil was used as lubricant during deviation drilling. Good hole

cleaning was maintained throughout the drilling of this section and also hi-viscous pills were

pumped for effective hole cleaning. No caving or sloughing was observed over shakers. pH range

was maintained in the range 9.0-9.5 for optimum performance of chemicals and to avoid corrosion.

Property Programmed Actual

Density pcf 67-68 66-68

MF Viscosity , sec/ quart 55-50 50-60

Fluid loss, cc 15-10 8.0-11.0

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PV , cp - 12-14

YP , lbs/ cft - 17-24

pH - 9.0-9.5

Sand % - 0.1-0.3

3.1.3 Solids Control:

The solid control equipments used were two Shale Shakers of screen sizes 20X20 (upper

deck) and 20X40 (lower deck) each, Desander and Desilter. These screens were not able to control

the solids component within the acceptable limit. Therefore, the mud was diluted constantly with

water and sand traps were dumped during trips for lowering the solid content.

4. OIL STRING STAGE:

Hole Size: 8 ½ inch

Interval: (2112-3085) m

After completion of necessary well head hook-up, arranged for drilling the oil string stage of

the hole with an 8 ½ inch bit. Ran in 8 ½ inch TCR (1-1-7) bit & tagged cement top @ 2095m.

Cleaned cement, drilled out F/C, shoe followed by drilling fresh formation down to 2114m.

Circulated & conditioned mud and conducted PIT @440psi with EMW=79.2pcf. The test was

found OK. The bit was then changed with a new TCR (1-1-7) bit and lowered with deviation BHA.

Drilled 8 ½” hole further down to 2703m using one more TCR bit. While reaming at 2703m, tight

pull was observed @2691m and suddenly the string got stuck. Worked on string without success.

Arranged for and spotted 50bbls of High Speed Diesel (HSD) treated with 5% pipelax covering

382m in the annulus and keeping 10 bbls inside string. It was then allowed a soaking time of 6

hours with keeping the string in compression. Worked on string and the string got released

immediately after half an hour of spotting. Two DP singles were pulled out with the pump on and

circulated out oil prior to pulling out for bit change. *Survey report: @ 2675m (TVD=2140.66m);

Inc=41.10deg; Azm=359.58. After pulling out upto 1851m, operations remain suspended due to

bandh called by local people till 10:30 am of next day. The bit was pulled out of the hole and ran in

new TCR (1-1-7) bit with new BHA down to bottom @2703m freely. Drilled further down to

3082m and Oil String Stage drilling was terminated.

Circulated mud system and pulling out bit upto 2650m for a wiper trip. Ran in bit and got

held up at 3007m. Washed down to 3019m and ran in bit to bottom freely. Circulated and pulled bit

out of the hole for OH survey. WLD lowered PEX-HRLA-GPIT log & got held up @2958m.

Recorded log in the range 2958m - 2108m (BHT= 79.99degC). Made a free hole probing trip with

stiff hook-up prior to casing lowering. Drilled down to 3085m (final drilled depth) and circulated

thoroughly. The bit was then pulled out of hole. Lowered 5 1/2" casing and landed successfully with

shoe at 3081.32m (F/C at 3057.49m). Cemented the casing by using 2200 bags of API class G

cement wet blended with SLB chemicals. The cement slurry with slurry density of 102pcf for lead

and 118pcf for tail was displaced by 222.5bbls of 70pcf mud. Plug bumped at 2800psi and 2294stks

against calculated 2168stks. Pump efficiency was 94.5%. BPV holding OK. WOC. Completed

working on well head and DP breaking. Tested WF spool @4000psi and found OK.

4.1 FLUID DISCUSSION

4.1.1 Mud Type: XC-Polymer-PAC-Polyol Mud System

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This section was drilled with Bentonite-barytes semi-dispersed mud treated with XC-

Polymer, PAC(R), CMC(LVG) etc. Mud weight was maintained as 68-71pcf and MF viscosity

ranges from 50-46 sec/quart in this section. No caving or sloughing was observed over shakers.

Property Programmed Actual

Density pcf 68-72 68-71

MF Viscosity , sec/ quart 50-45 46-50

Fluid loss, cc 8.0-5.0 6.0-8.0

PV , cp - 12-17

YP , lbs/ cft - 18-26

Gel 0/15 min, lbs/ cft - 05-10/20-49

pH - 9.0-9.5

Salinity, ppm - 900-1000

Sand % - 0.1

Oil % - 3-5

Solid % - 11-12

HP-HT F/L, cc - 18

L/C - 0.2344

4.1.2 Rheology & Lubricity:

The Rheological properties were maintained properly by using XC-Polymer. Linseed oil and

Polyol were used as lubricants. Drilling Detergent was also used during drilling of clay formation.

The pH of the mud system was maintained in the range of 9.0-9.5 for optimum performance of the

chemicals. Formaline was used as the Bio-polymers are easily susceptible for bacterial degradation.

4.1.3 API Fluid Loss:

Fluid loss was controlled by addition of CMC(LVG) and PAC (R) during initial stages

whereas, PAC (SL) and Resinex were judiciously used during later part of drilling.

4.1.4 Solids Control:

In oil string stage, screens of upper decks of both the shakers were changed to initially

20X30 and then to 30X40 whereas, the screens of lower decks were changed to initially 40X40 and

then to 40X60 for better performance. Other solid control equipments used were Desander and

Desilter. These screens were not able to control the solids component within the acceptable limit. So

the mud was diluted constantly with water and the sand trap was dumped occasionally during trips

to keep the total solids under control.

4.2 Downhole Problem: Extra sheet is attached for Pipe Stuck Case study.

4.3 HOLE STABILITY: As per caliper log analysis of 8 ½” hole, it was evident that 33.6% of the

hole was true gauge. The hole was found to be stable throughout the drilling of the 8 ½” section. No

caving or sloughing was observed over the shakers.

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5. PRODUCTION TESTING:

Arranged for and ran in rotovert and tagged cement top @3057m. Circulated & pulled the

rotovert out of the hole for cased hole survey. WLD made a Junk basket trip and recorded CBL-

VDL-GR-CCL-CAST log in the range 3057m-800m. As per CBL-VDL log interpretation, the

cement bonding was recorded to be good to moderate as the amplitude values of the log lies

between 5mV-50mV. However the zone of interest shows below 10mV amplitude value.

After log, Ran in open ended 2 7/8” tbg down to 3056m with intermediate change over to

water. Changed over the well fluid from mud completely to 2% Sodium Formate solution. Pulled

out open ended (OE) tbg back up to 2539m. Rigged up X-mass tree, pressure tested surface lines

@3000psi and conducted 5 1/2" casing hermetical testing @ 2500psi, found OK. Rigged down X-

mass tree and pull out open ended tbg out of the hole. Ran in hydraulic packer with GLVs and set

packer @2784.76m. Tested packer @2900psi, but observed full bore return through annulus

indicating failure of the packer. Unset the packer and pulled the packer out of the hole. Ran in new

Hydraulic packer with GLVs and set packer @2775.21m. Tested the same @2000psi and found

OK. Lowered the fluid level by 800m. Schlumberger perforated the well in the range 2848m-

2854m. No immediate pressure build up was observed. Unloaded cumulative 131.5bbls of well

fluid by applying N2 shots. Shut in well and observed SITP = 1300 psi, SICP = 700 psi. Opened up

the well and self unloaded 1.5bbls, cumm = 133bbls of well fluid accompanied by gas. Shut in Well

with SITP=1300psi and SICP=550psi.

5.1 Sample analysis:

Date SITP

psi

SICP

psi

Water Oil Salinity pH CO3 HCO3 API PP

24/03/2017 Nil Nil 100%, 0% 1000 8.5 60 976 - -

25/03/2017 Nil Nil 100%, 0% 200 8.5 60 427 - -

26/03/2017 750 - 100%, 0% 100 8.5 60 427 - -

27/03/2017 700 700 100% 0% 100 7.0 0 366 - -

28/03/2017 1300 550 - - - - - - - -

The well was then declared Rig Down on 31.03.2017 as a Natural Gas Producer.

6. CHEMICAL COST ANALYSIS: The total mud chemicals cost incurred in this well was

found to be Rs. 5870559.17 only and cost per meter was found to be Rs 1902.93 only.

CHEMICALS COST % OF TOTAL COST

Basic Chemicals 1176979.87 20.04885456

Rheology Control Additives 728937 12.416824

Fluid loss reducer 1552509 26.44567502

Mud lubricants 1818177.2 30.97110765

Others 574879.1 9.792578243

Report submitted on 10.07.2017.

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Senior personals attached to the well:

A.N. Singh (DGM-Chemical Operations) (Dipankar Dutta)

Rajib Sarmah (Dy. C. C. Drilling) Sr. Chemist In-charge

Dr. Jugal Hazarika (Dy. C. C. Drilling) LOC: HYS

Krishna Borgohain (Sr. Chemist)

Also assisted by: 1. Amlan Buragohain, Chemist

2. Ishani Goswami, Chemist

Loc:HYS 8 1/2" Hole Section Trip Information

Sl No

Date Event Bit MW

1 15.02.17 Cemented 9 5/8" csg with shoe @2108.38m (F/C=2095.75m) 68

2 16.02.17 Working on well head.

3 17.02.17 Completed well head hook up. RI bit. CC & Drilled to 2114m. TCR (1-1-7)

4 18.02.17 C & C. Took PIT @ 440 psi with EMW= 79.2 pcf. POOH. RI new bit.

5 19.02.17 RI new bit with deviation tools and drilled to 2209m. TCR (1-1-7)

6 20.02.17 Drilled to 2283m. 70

7 21.02.17 Drilled to 2368m.

8 22.02.17 Drilled to 2432m.

9 23.02.17 Drilled to 2441m. Made free RT for bit change. TCR (1-1-7)

10 24.02.17 Drilled to 2478m.

11 25.02.17 Drilled to 2571m.

12 26.02.17 Drilled to 2642m. 71

13 27.02.17 Drilled to 2703m. While reaming FDZ, string got stuck @ 2691m.

14 Freed by spotting 50bbls of HSD. PO two sngls & C & C for POOH.

15 28.02.17 PO bit upto 1851m freely. Operation suspended.

16 01.03.17 Operations resumed. POOH bit. RI new bit to 2114m. TCR (1-1-7)

17 02.03.17 RI bit to bottom freely. Drilled to 2749m. 70

18 03.03.17 Drilled to 2811m.

19 04.03.17 Drilled to 2875m.

20 05.03.17 Drilled to 2950m. C & C. PO bit upto 1906m freely for bit change

21 06.03.17 POOH. RI new bit to bottom freely. Drilled to 2960m. TCR (1-1-7)

22 07.03.17 Drilled to 3082m. Terminated drilling. C & C mud.

23 08.03.17 Made a ST upto 2650m. Got help up at 3007m while RI bit.

24 Cleared by W/down. C & C. POOH for OH survey.

25 09.03.17 WLD lowered PEX-HRLA-GPIT log & got held up @2958m.

26 Recorded log in the range 2958m - 2108m.

27 10.03.17 Made a free RT with stiff hook up. During tripping drilled to 3085m.

28 11.03.17 RI 5 1/2" csg down to 2406m.

29 12.03.17 Cemented 5 1/2" csg with shoe at 3081.32 m & F/C at 3057.49 m 70

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WELL SUMMARY RIG : S-6

WELL NO.: NHK-639 (Loc. HYS) South Kathalguri Area, Hugrijan ML

J-Bend, Deviated

Date of spudding: 25-01-2017

Reached TD on: 08-03-17

Well site: DIC: Hrishichand Phookan (9435039375/ 7896284065) Chemist: Dipankar Dutta (9957573864) Test geologist: Pritom Baruah (9706455208) (6397) Supdt. Geologist (D/O): Nilamani Deka : 6377 (O) Chief Geologist (D/O): P Barua : 6379 (O)

Rig Down on:

D.F. Elevation: 130.60m asl

G.L. Elevation: 122.98m asl

Target Depth: 3082.0 m MD (2450.0 m TVD)

Actual Depth: 3082.0m MD (2429.3m TVD)

Dev. Corr: Variable BD Factor: 39.16m for

TVD (Actual)

Co-ordinates (Surface) Longitude: 95° -26'-9.6'' Latitude : 27°- 20’-24.0”

X : 3280377.3047 Y : 1073863.2313

Co-ordinates (S/S) (Actual) Longitude: Latitude :

X :3280506.0000 Y : 1075420.0000

DEVIATION DATA

PLAN: i) KOP: 180.0m ii) THD of 1738.0 m to be achieved at 3082m MD/ 2450mTVD iii) Maximum drift angle 41.53° at 768.76m MD/ 718.54mTVD

ACTUAL (GPIT): i) KOP: 180.0m ii) THD of 1628.3 m to be achieved at 2924.0m MD/ 2326.1mTVD iii) Maximum drift angle 45.7° at 2171.1m MD/ 1768.2mTVD

FORMATION TOP:

HORIZON EXPECTED ACTUAL

Thickness (m) MWD TVD

From Flush Sample Log From wire line log

MWD TVD mbd MWD TVD mbd

ALLUVIUM Surface Surface Surface Surface Surface Surface Surface Surface

GIRUJAN 1866 1540 2200.0 1788.4 1749.2

TIPAM 2614 2100 2833.0 2258.8 2218.8 2830.0 2262.0 2222.8

TIPAM- 40

2961 2360 2954.0 2348.3 2309.1 - - -

CASING POLICY:

ESTIMATED ACTUAL REMARKS (Av. Sl. Wt) (lbs/cft)

Hole size (inch)

Casing size

(inch)

Casing shoe (m)

Casing Shoe (m)

Float Collar

(m) Cement Type

Cement amt. (bags)

Date of casing Lead Tail

17½ 13⅜ 150 154.47 ----- API Class ‘G” NS Dalmia cement

700 27-01-2017

113.15

12¼ 9⅝ 2175 2108.38 2095.7 API Class ‘G” NS Dalmia cement

2300 15-02-

17 101.6 113.7

8½ 5½ 3082 3081.00 3057.5 API Class ‘G” NS Dalmia cement

12-3-

17 102.8 118.0

FLUSH SAMPLE

Depth Range (m) Interval (m) Purpose

1800-2600 2600-2900

2900-Objective

5 3 2

Logging only

1800-2900 2900-Objective

10 6

Petrology, Paleontology, source rock analysis and storage

Sample Collection Below 1800m Gas Logging Below 13.3/8” Casing shoe

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WIRELINE SERVICES

17½″ Hole: HRI/DIL/DLL-GR-SP-CAL, CDT/SDLT-CNT/DSNT-GR/SGR-CAL, DSI/WSTT and Inclinometer surveys at 1st isolation stage. 12¼″ Hole: DLL-MSFL-SP-GR-CAL, CDT/SDLT-DSNT/CNT- SGR/GR -CAL, DSI/ WSTT and Inclinometer survey at second isolation stage. 8½ Hole: DLL-MSFL-SP-GR-CAL, SDLT/CDT-DSNT/CNT- SGR/GR -CAL, DSI/ WSTT, Inclinometer survey, CMR (provisional),FMI (provisional), MDT (provisional), VSP (provisional), Side-wall coring, CBL-VDL-GR-CCL and USIT (provisional),PEX triple combo (optional) surveys are to be carried out at the final depth.

DATE DEPTH

(M) DETAILS OF THE OPERATION

MUD PARA

25-Jan-17

56 Carried out pre spud safety recce. A/F & spudded in the well @3am and drilled down to 56m.

66/65

26-Jan-17

156

Drilled down from 56m to 75m. Took overhead circulation from 75m & continued drilling upto 156m. Terminated conductor stage drilling. C&C mud. Made a round trip. C&C mud. POOH bit. A/F & RI 13 3/8" casing & landed with shoe @ 154.47m. Presently circulating prior to cementing.

66/65

27-Jan-17

156

Cemented 13 3/8" casing with shoe @ 154.47m by using 700 bags of NS Dalmia class'G' cement. Displaced the slurry with 66 bbls of 66pcf mud (keeping 5m underdisplaced). Avg slurry weight was 113.15pcf & return slurry weight was 111pcf. WOC. Workng on wellhead.

66/65

28-Jan-17

156 Completed workng on wellhead. A/F & RI new 12 1/4 " TCR (1-1-7) bit down to 86m. Further RI is in progress.

66/65

29-Jan-17

174

RI bit down from 86m to 138m and tagged cement top. Circ & cleaned cement, cut shoe and drilled fresh formation down to 174m. C&C mud. POOH bit. A/F & RI same bit with new Almansoori deviation BHA down to 27m.

67/65

30-Jan-17

430 RI bit from 27m down to bottom @174m. Circ & drilled down from 174m to 430m. Further drilling is in progress. *survey@402m; Inc=14.6deg; Azm=11.5

67/60

31-Jan-17

561

Drilled down from 430m to 467m. During drilling observed leakage from standpipe vibrating hoose hammer union. PO bit inside casing shoe. Attended and rectified the same. RI bit down to bottom . Circ and drilled ahead to 561m.

67/60 26/14/20 7/37 11cc/1.0/0.2

1-Feb-17 861 Drilled down from 561m to 861m. *Survey @ 833m (TVD=769.29m); Inc=40.96; Azm=6.53

67/57 26/14/20 7/37 11cc/1.0/0.2 pH=9.5

2-Feb-17 962

Drilled down from 861m to 962m. C&C mud. POOH bit. A/F & RI new 1-1-7 TCR bit down to 137m. *Survey @ 933m (TVD=843.5m); Inc=41.53; Azm=6.95. **PO bit condition T2B2G1/8

66/57 26/14/20 7/39 11cc/1.0/0.2 pH=9.5

WELL COMPLETION AND PRODUCTION TESTING

Conventional production testing will be carried out in this well. For this purpose the following equipment, infrastructure, facilities etc will be required : i) Surface equipment:

5,000 psi X-mas tree. ii) Boiler and gas flaring arrangement to be made at suitable place at well site. iii) NPU/CTU may be required for unloading the well. iv) Make necessary arrangement for wellhead pressure test upto 3,000 psi and oil-string casing hermetical test

upto 2500 psi v) Base plate, rigidly supported, to be incorporated with 9.3/8” X 5M casing head housing.

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3-Feb-17 1196

RI new (1-1-7 )TCR bit down from 137m to bottom @ 962m. Circ & drilled down from 962m to 1196m. *Survey @ 1167m (TVD=1017.59m): Inc=42deg; Azm=6.69.

67/57 25/14/22 6/36 11cc/1.0/0.2 pH=9.5

4-Feb-17 1402 Drilled down from 1196m to 1402m. *Survey @ 1373m (TVD=1169m): Inc=41.6 deg; Azm=6.80.

67/55 24.5/13/23 7/40 10cc/0.2%

5-Feb-17 1458

C&C mud. POOH bit. Changed MWD tools. RI same bit with same BHA with shallow testing of MWD tools down to bottom @1408m freely. Circ and drilled down to 1458m. *Survey @ 1430m (TVD=1211m): Inc=41.59 deg; Azm=6.53.

67/55 24/13/22 8/32 10.5cc/1.0/0.2%

6-Feb-17 1626 Drilled down from 1458m to 1626m. C&C mud prior to bit change. C&C mud is in progress. *Survey @ 1596m (TVD=1336.77m): Inc=40.69 deg; Azm=5.96.

68/55 24/14/20 6/32 10.0cc/1.0/0.3% pH=9.5

7-Feb-17 1654

C&C mud. POOH bit. A/F & RI new 1-2-7 bit down to bottom @1626m freely. Circ and drilled down to 1654m.*Survey @ 1629m (TVD=1358.12m), Inc=39.76 deg; Azm=6.85.

68/55 24/14/20 6/30 9.0cc/1.0/0.2 pH=9.5

8-Feb-17 1841 Drilled down from 1654m to 1841m to . *Survey @ 1812m (TVD=1503.86m), Inc=40.29 deg; Azm=8.52.

68/55 22/13/18 6/32 8.0cc/1.0/0.2 pH=9.5

9-Feb-17 1993 Drilled down from 1841m to 1993m. *survey@1971m(TVD=1621.6m), Incl=42.8, Azm=6.31.

68/55 23/14/18 6/30 9.5cc/1.0/0.2 pH=9.5

10-Feb-17

2112

Drilled down from 1993m to 2112m. C&C mud prior to PO for wiper trip. PO bit upto 697m. *Survey@2092m(TVD=1710.7m), Incl=42.3, Azm=5.55.

68/55 26/14/24 9/38 9.0cc/1.0/0.2 pH=9.0

11-Feb-17

2112

POOH bit from 697m. A/F & RI same bit and BHA with stab @ 0 &10m down to bottom @ 2112m freely. C&C mud prior to PO for OH survey. PO bit upto 1831m. Further PO is in progress. PO bit condition: T3B2G1/4

68/52 23/13/20 8/36 9.0cc/1.0/0.1 pH=9.0

12-Feb-17

2112

POOH bit from 1831m. WLD recorded ACRT-SP-GR-SDL-DSN-CALI-BSAT-IDT log in the range 2112m-140m. Loggers depth=2112m, BHT=135 deg F. A/F & RI same bit with stab @ 0, 9 & 18m down to 116m.

68/50

13-Feb-17

2112

RI bit down from 116m to bottom at 212m freely. Established circulation. C&C mud prior to 9 5/8 " csg lowering. POOH bit. A/F & lowered 9 5/8" csg down to 12m.

68/50 20.5/12/17 11/40/45/48 9.2cc/1.0/0.1 pH=9.5

14-Feb-17

2112 Lowered 9 5/8" csg from 12m to 1805m. 68/50 20.5/12/17 11/40/46/48

9.2cc/1.0/0.1 LC=0.2348 9.5/1000

14

15-Feb-17

2112

RI 9 5/8" csg from 1805m and landed with shoe @2108.38m (F/C=2095.75m) by using 2300bags of N.S. Dalmia class G cement. Established gel break circulation @28SPM (SPP=450psi). Displaced the slurry with 440bbl of 68pcf mud. Plug caught T.E. @1526stks and bumped at 4397stks (1950psi) against calculated 4234stks (Eff=96.3%). Average slurry density for L=101.6pcf and T=113.75pcf. Max contaminated slurry of 104pcf surfaced out in return. BPV holding OK. WOC. Working on well head.

68/50 20.5/12/17 11/40/46/48 9.2cc/1.0/0.1 LC=0.2348 9.5/1000

16-Feb-17

2112 Working on well head. 68/50

17-Feb-17

2114

Completed working on well head. A/F & RI 8 1/2" TCR bit (1-1-7) and tagged cement top @ 2095m. C&C mud.Cleaned cement,FC & shoe up to 2112m and drilled down fresh formation upto 2114m. C&C mud prior to PIT.

68/50 23/14/18 6/36 8cc/1.0/0.1 pH=9

18-Feb-17

2114

C&C mud . Conducted PIT @2114m (TVD= 1726.84m), 440 psi with EMW= 79.2 pcf and current mud weight 68 pcf. Found OK. POOH bit. A/F & RI deviation BHA with new 8 1/2" TCR (1-1-7) bit down to 1870.42m. Further RI is in progress. PO bit condition: T5 B4 G

68/50

19-Feb-17

2209

RI deviation BHA with new 8 1/2" TCR (1-1-7) bit from 1870.42m down to bottom @2114m. Circ and drilled ahead to 2209m. Survey@ 2190m (TVD=1781.04m), Inc=45.4 deg, Azm=3.3.

68/50 26/14/24 8/53 7.0cc/1.0/0.1 pH=9.0

20-Feb-17

2283 Drilled down from 2209m to 2283m. Survey@ 2256.97m (TVD=1828.25m), Inc=45.4 deg, Azm=358.34.

70/50 27.5/15/25 10/49 7.0cc/1.0/0.1 O/S=5/12 pH=9.0

21-Feb-17

2368 Drilled down from 2283m to 2368m. Survey@ 2349.78m (TVD=1895.94m), Inc=41.4 deg, Azm=357.3.

70/50 22.5/13/19 6/27 7.3cc/1.0/0.1 O/S=4/12 pH=9.0

22-Feb-17

2432 Drilled down from 2368m to 2432m. Survey@ 2405m (TVD=1937.72m), Inc=41.8 deg, Azm=358.

70/50 28/16/24 10/32 7.2/1.0/0.1 O/S=4/12 pH=9.0

23-Feb-17

2441

Drilled down from 2432m to 2441m. C&C mud prior to PO for bit change. POOH bit. A/F & RI new 8 1/2" (1-1-7) bit with deviation BHA down to 524.62m. PO bit condition: T3B3G1/8. Cuttings: 4cft (D, Rec= 34.4%) + 4cft (Circ).

70/50 23/14/18 7/34/39/45 7.4/1.0/0.1 O/S=3/11 9.0/1000 MBC=3.0 LC=0.2344 HPHT=18cc

24-Feb-17

2478 Drilled down from 2441m to 2478m. *Survey@2451.42m (TVD=1971.91m); Inc=41.6; Azm=357.6. **Cuttings=28cft (Recovery=58.6%)

70/50 26.5/15/23 10/47 7cc/1.0/0.1 pH=9.5/1000 O/S=4/12

15

25-Feb-17

2571 Drilled down from 2478m to 2571m. *Survey@2562m (TVD=2041.54m); Inc=40.4 deg; Azm=1.07. **Cuttings=56cft (Recovery=44.2%)

70/50 26/13/26 10/39 7cc/1.0/0.1 pH=9.5 O/S=4/12

26-Feb-17

2642

Drilled down from 2571m to 2638m. Observed leakage fom MP-01. Attended and rectified the same. Resumed drilling form 2638m to 2642m. *Survey@2616m (TVD=2096.19m); Inc=40.8 deg; Azm=0.01 deg. **Cuttings=24cft (Rec=26.2%)

71/50 26.5/15/23 8/42 7.0cc/1.0/0.1 pH=9.5 O/S=4/12

27-Feb-17

2703

Drilled down from 2642m to 2703m. While reaming Kelly length observed tight pull @ 2691m & string got stuck. Worked on string without success. A/F & spotted 50bbls of HSD treated with5% pipelax covering 382m in the annulus & keeping 10 bbls inside string. Allowed to soak for 6 hrs with keeping the string in compression. worked on string & pipe got released @ 170 T. PO two DP singles with pump on. Circulating prior to PO for bit change. *Survey @ 2675m (TVD=2140.66m); Inc=41.10deg; Azm=359.58. **Cuttings=30cft (recovery=38.12%)

71/50 26/16/22 9/40 7.5cc/1.0/0.1 pH=9.5 O/S=4/12

28-Feb-17

2703

PO bit from 2672 to 2082m. Operaction suspended due to bandh called by local people. Resumed operation & PO bit from 2082m to 1851m. Operation suspended again due to bandh called by local people.

71/50

1-Mar-17 2703 Operation resumed @ 10:30am. POOH bit from 1851m. A/F & RI new (1-1-7) bit with new BHA down to 2114m. * PO bit condition T2 B2 G-in.

71/50

2-Mar-17 2749 RI new bit from 2114m to bottom freely. Circ & drilled down from 2700m to 2749m. Cuttings = 14cft.

70/48 24/14/23 8/35 7.00cc/1.0/0.1 pH=9.5 O/S= 4/12

3-Mar-17 2811 Drilled down from 2749m to 2811m. Pumped low-vis followed by hi-vis pill intermittently. * Cuttings recovered 14 cft.

70/48 23/14/20 7/34 6.5cc/1.0/0.1 pH=9.5 O/S= 4/12

4-Mar-17 2875 Drilled down from 2811m to 2875m. Pumped low-vis followed by hi-vis pill intermittently. * Cuttings recovered 22 cft.

70/48 24/12/24 7/36 6.5cc/1.0/0.1 pH=9.5 O/S= 4/12

5-Mar-17 2950 Drilled down from 2875m to 2950m. C&C mud. PO bit upto 1906m for bit change. *Cuttings=22cft

70/48 28/15/26 6/31 6.5cc/1.0/0.1 pH=9.5 O/S= 4/12

6-Mar-17 2960 POOH bit from 1960m. A/F & RI new 1-1-7 bit with same BHA down to bottom @2960m freely. Circ & drilled down from 2950m to 2960m. *Cuttings = 3cft

70/48 26/17/18 5/20 7.0cc/1.0/0.1 pH=9.5

7-Mar-17 3082 Drilled down from 2960m to 3082m. Terminated oil string stage drilling. C & C mud. PO bit up to 2650m for short trip. *Cuttings=31cft.

70/48 28/15/25 5/21 6.5cc/1.0/0.1 pH=9.5 O/S=4/12

16

8-Mar-17 3082

PO bit from 2650m to 2091m for short trip. R/Back bit & got held up@3007m. Washed down to 3019m & then RI bit down to bottom freely. C&C mud. PO bit upto 239m for OH survey. *Cuttings=4cft.

70/48 26/16/22 6/33 6.5cc/1.0/0.1 pH 9.5 O/S=4/12

9-Mar-17 3082

POOH bit from 239m. WLD lowered PEX-HRLA-GPIT log & got held up @2958m. Recorded log in the range 2958m - 2108m. (BHT= 79.99degC). Rigged down logging gears. A/F & RI bit down to 1825m.

70/48

10-Mar-17

3085

RI bit with stiff hook up from 1825m to bottom freely. Circ and drilled down to 3082m to 3085m. C&C mud. POOH bit. A/F RI 5 1/2" csg. * Cutting= 4 cft.

70/48 30/17/26 6/22 6.0/1.0/.1 pH=9.5

11-Mar-17

3085 A/F & RI 5 1/2" csg down to 2406m. 70/46

12-Mar-17

3085

Cemented 5 1/2" csg with shoe at 3081.32 m & F/C at 3057.49 m by using 2200 bags of N.S. API Class 'G' Dalmia cement wet blended with SLB chemicals ( slurry density 102 pcf for lead and 118 pcf for tail). Pumped 50 bbl (US) pre flush ( water treated with 1% ASPP + 0.5% Teepol) followed by 50 bbl (US) spacer of 93.5 pcf density ahead of cement slurry. Displaced cement slurry with 222.5 bbl of 70 pcf mud. Plug bumped at 2800 psi & 2294 strokes against calculated 2168 strokes. Pump efficiency was 94.5%. BPV was holding. WOC.

70/46

13-Mar-17

3085 Worked on wellhead. DP breaking is in progress. 70/46

14-Mar-17

3085

Broke and laid down DP singles. Tested WF spool but found leakage. Resumed DP breaking and completed the same. Made up 13 no.s of 2 7/8" tbg and the same is in progress.

70/46

15-Mar-17

3085 Tested WF spool @4000psi. Found ok. A/F & RI rotovert down to 2096m. *Transferred 2 loads of mud to Joypur pit.

70/46

16-Mar-17

3085

Continued RI rotovert down from 2096m & tagged F/C @3057m. C&C mud. PO bit up to 580m prior to cased hole survey. *Transferred 2 loads of mud to Joypur pit.

70/46

17-Mar-17

3085

POOH rotovert. WLD made a Junk basket trip & recorded CBL-VDL-GR-CCL-CAST log in the range 3057m - 800m. R/dn logging gears. RI OE tbg down to 3056m with intermediate change over to water 2200m. Presently change over well fluid from mud to 2% SF soln is in progress.

2% SF

18-Mar-17

3085

Changed over well fluid from mud to 2% SF soln completely. PO OE tbg up to 2539m. Rigged up x-mass tree. Pressure tested surface lines @3000psi. Csg hermatically tested @2500psi in steps of 500psi. Found pressure holding OK. Rigged down x-mass tree. POOH OE tbg from 2539m. A/F & RI Hydraulic packer with GLVs down to 814m.

2% SF

19-Mar-17

3085 RI Hydraulic packer with GLVs from 814m to 2784m. Rig up X-mass tree. To set packer today.

2% SF

20-Mar-17

3085

Set packer @ 2784.76M. Tested packer @ 2900 psi, but observed full bore return through annulus indicating failure of the packer. R/down X-mass tree. Unset and POOH packer. RI new hydraulic packer down to 67m.

2% SF

21-Mar-17

3085 RI new hydraulic packer with GLVs down from 67m to 2775.21m. Dropped packer setting ball & fixed tbg hanger cone. R/up X-mass tree is in progress.

2% SF

22-Mar-17

3085 R/up X-mass tree. Set packer @ 2775.21m. Tested the same upto 2000psi, found OK. Lowered fluid level upto 800m. SLB to perforate the well today.

2% SF

17

23-Mar-17

3085 SLB perforated the well in the range 2848m to 2854m. No immediate pressure build up.Shut in well. Morning SITP=SICP=nil

2% SF

24-Mar-17

3085

Unloaded 28 bbls (Cumm=70.5bbls) of well fluid by applying N2 shots. Shut in well. Morning SITP=SICP=Nil.* SCT=5:15 PM, W=100%,pH=8.5,Sal=1000,CO3=60,HCO3=976

2% SF

25-Mar-17

3085

Unloaded 27 bbls (Cumm=97.5bbls) of well fluid by applying N2 shots. Shut in well. Morning SITP=SICP=Nil.* SCT=5:10 PM(25.03.2017), W=100%,pH=8.5,Sal=200,CO3=60,HCO3=427

2% SF Soln pH=8.2,Sal=80,CO3=nil,HCO3=4575

26-Mar-17

3085

Unloaded 24 bbls (Cumm=121.5bbls) of well fluid by applying N2 shots. Shut in well. Morning SITP=750 psi. * SCT=5:20 PM(26.03.2017), W=100%,pH=8.5,Sal=100,CO3=60,HCO3=427

2% SF Soln pH=8.2,Sal=80,CO3=nil,HCO3=4575

27-Mar-17

3085

Self Unloaded 10 bbls (Cumm=131.5bbls) of well fluid. Shut in well. Morning SITP=1300 psi. SICP=700psi* SCT=9:30am(27.03.2017), W=100%,pH=7.0,Sal=100,CO3=Nil,HCO3=366

Well fluid

28-Mar-17

3085 Opened up well and self unloaded 1.5 bbls (Cumm=133 bbls) of well fluid accompanied by gas. Shut in well. Morning SITP=1300 psi. SICP=550psi

Well fluid

29-Mar-17

3085 Arranging for Rig release. Tank cleaning is in progress.

Well fluid

30-Mar-17

3085 Arranging for Rig release. Transferred 2 loads of mud to Joypur pit. Tank cleaning & chemical transfer are in progress.

Well fluid

31-Mar-17

3085 Declared rig down. Chemical and mud transfer completed. Tank cleaning is in progress.

Well fluid

18

CHEMICAL COST ANALYSIS

LOC- HYS

Chemicals Unit Unit rate(Rs) Actual chemical

consumption Actual cost (Rs)

BARYTES MT 12277.13 35 429699.55

BENTONITE MT 6005.58 104 624580.32

CAUSTIC SODA KG 40.90 3000 122700

CMC(H) KG 109.59 1400 153426

CMC(L) KG 86.23 5700 491511

PAC® KG 288.39 1950 562360.5

PAC (SL) KG 289.03 1650 476899.5

RESINEX BAG 1086.90 20 21738

DRILLING DETERGENT DR 1419.47 55 78070.85

EP-LUBE LIT 62.25 3000 186750

LINSEED OIL LIT 100.88 9000 907920

SOD BICARBONATE KG 27.19 100 2719

XC POLYMER KG 662.67 1100 728937

FORMALINE KG 19.60 500 9800

PHPA KG 190.77 100 19077

MAGCOASPHASOL BAG 986.59 0 0

PIPELAX LIT 90.72 1350 122472

SOD FORMATE KG 33.76 1400 47264

ASPP KG 110.45 275 30373.75

TEEPOL LIT 54.84 100 5484

DO-13 / HR-4 KG 165.36 420 69451.2

OCTYL ALCOHAL KG 129.81 430 55818.3

POLYOL KG 108.70 6656 723507.2

5870559.17

CHEMICAL COST ANALYSIS (PIE DIAGRAM)

Cost (Rs) % OF TOTAL COST

BASIC CHEMICALS 1176979.87 20.04885456

RHEOLOGY CONTROL ADDITIVES 728937 12.416824

FLUID LOSS REDUCER 1552509 26.44567502

SHALE STABILIZER 19077 0.324960527

MUD LUBRICANT 1818177.2 30.97110765

OTHERS 574879.1 9.792578243

Total 5870559.17 100

19

Depth Range (m bdf)

Conductor

Stage

(0-156)m

Isolation Stage

(156-2112)m

Oil String Stage

(2112-3085)m

Weight (lbs/cft) 66 67-68 68-71

MF viscosity (sec) 65 52-60 50-48

AV (cp) nm 18-28 22-30

PV (cp) nm 12-18 14-17

YV (lbs/100 sq.ft) nm 12-22 14-26

O-Min. Gel (lbs/100 sq.ft) nm 4-6 5-9

20

15-Min.Gel (lbs/100 sq.ft) nm 30-56 20-40

API Filter Loss (cc) nm 8.0-15.0 6.0-8.0

Sheath (mm) nm 1.0 0.5-1.0

pH 8.5-9.5 9.0-10.0 8.5-9.5

Salinity (ppm) nm 700-950 900-1000

Oil (%) v/v nm 1.0-2.0 2.0-4.0

Solid (%) v/v nm 16.0-18.0 10.0-12.0

Sand (%) v/v nm 0.1-0.3 0.1

LC Nm 0.2345-0.2214 0.2344-0.17

Type of mud

Bentonite

suspension

lightly treated

with Caustic

Soda

Bentonite

suspension treated

with CMC(H),

CMC(L), Caustic

Soda, Linseed Oil,

Drilling Detergent,

PAC(R) etc.

XC polymer-PAC-Polyol

mud system fully treated

with C/Soda PAC(R),

PAC (SL), Linseed Oil,

Drilling detergent, EP

Lube, Hypr-graph lube

etc.

21

MUD PARAMETERS OF LOC:HYS (Rig:S6)

Dep

th

(m)

Mu

d W

eigh

t (p

cf)

MF

V

isco

sity

(se

c)

AV (cp)

PV (cp

)

YP (lbs/100

ft2)

0'gel (lbs/100

ft2)

15'gel (lbs/100

ft2)

API F/L(ml

)

Shea

th

(mm

)

San

d%

(v

/v)

pH

Salin

ity

(pp

m)

HP

/HT

FL (

ml)

MB

C (

cc)

LC

Oil/

Solid

(%

)

ISOLATION STAGE (156m-2112m)

467 67 60 18 12 12 6 56 15 1 0.3 10.0

700 - - - -

861 67 57 26 14 20 7 37 11 1 0.2 9.5 800 - - - -

944 67 57 20 12 16 4 43 11.5

1 0.1 10.0

800 - 4.5 0.234

5 1.0/18

1274 67 57 28 18 18 4 54 8.2 1 0.1 9.5 900 - - - -

1408 67 55 24 13 22 8 32 10.5

1 0.2 9.5 950 - - - -

1654 68 55 24 14 20 6 30 9 1 0.2 9.5 950 - - - -

1841 68 55 22 13 18 6 32 8 1 0.2 9.5 800 - 3.5 - -

2112 68 52 23 13 20 8 36 9 1 0.1 9 900 - - 0.221

4 2.0/16

OIL STRING STAGE ( 2112m-3085m)

2311 68 50 26 16 20 7 37 6 1 0.1 8.5 900 - 3.5 - 2.0/10

2441 69 50 23 14 18 7 34 7.4 1 0.1 9.0 100

0 18 3

0.2344

3.0/11

2666 70 49 26 14 24 6 34 8 1 0.1 9.5 900 - - - -

2703 71 50 26 16 22 9 40 7.5 1 0.1 9.5 100

0 - - - 4.0/12

2715 71 49 22 15 14 5 30 6.4 0.5 0.1 8.5 900 - - - -

2814 70 48 26 14 24 7 34 6.5 0.5 0.1 9.5 900 - 3 0.21 4.0/12

2950 70 48 28 15 26 6 31 6.5 1 0.1 9.5 950 16 - 0.194

3 4.0/12

2960 70 48 26 17 18 5 20 7 1 0.1 9.5 100

0 - - - -

3082 70 48 28 15 25 5 21 6.5 0.5 0.1 9.5 100

0 - - - -

3085 70 48 30 17 26 6 22 6 0.5 0.1 9.5 950 14 - 0.17 4.0/12 RESISTIVITY DATA OF ISOLATION STAGE: Rm= 3.16 at 69.9 degF Rmf= 2.99 at 67.6 degF Rmc= 3.19 at 71.3 degF RESISTIVITY DATA OF OIL STRING STAGE:

Rm= 3.09 at 69.8 degF Rmf= 2.79 at 68.2 degF Rmc= 3.22 at 71.7 degF

22

Bit Hydraulic and Mud Parameters of Loc:HYS (Calculated in US unit)

Date: 20.02.2017

Drilled Depth, m 2405

MFV, sec 50

TVD, m 1937.72

AV, cp 28

MW, pcf 70

PV, cp 16

MW, ppg 9.36

YP, lb/100 sq feet 24

ECD, ppg 9.98

0' gel, lb/100 sq feet 10

SG of mud 1.12

15' gel, lb/100 sq feet 32

Hydrostatic pressure, psi 3093.65

Fluid loss, cc 7.2

SPM 140

Cake thickness, mm 1

Pump liner, inch 6.5

Sand, % 0.1

Stroke length, inch 10

pH 9

Pump output, GPS 3.59

Salinity, ppm 1000

SPP, psi 1900

MBC, cc 3

Pump eff, % 95

Lubricity coeff. 0.2344

Nozzle area, sq. inch 0.993515625

Oil content, % 3

Flow Rate, GPM 477.31

Total solid, % 11

Jet Velocity, feet/sec 153.65

Water, % 86

BHHP 55.40

Ɵ600 56

SHHP 529.11

Ɵ300 40

Hydraulic ratio 0.10

Ɵ3 10

Hydraulic Impact Force, lb 355.62

n 0.49

HSI 0.97

k, cp 9.92

Pressure loss at bit, psi 198.93

Low gravity solid, %(V/V) 14.0035

Total ann pressure loss, psi 205.67

High gravity solid, %(V/V) -3.0035

Total Drillstring pr loss, psi 609.55

Annular volume, bbl 376.25

Annular velocity, feet/min

String volume, bbl 131.75

Casing Vs DP 232.43

Hole volume, bbl 508.00

OH vs DP 247.72

Bottom up time, min 33.11

OH vs 6.5" DC/Jar/NMDC 390.16

Cycle time, min 88.70

Date: 01.03.2017

Drilled Depth, m 2703

MFV, sec 50

TVD, m 2675

AV, cp 26

MW, pcf 71

PV, cp 16

MW, ppg 9.49

YP, lb/100 sq feet 22

ECD, ppg 10.00

0' gel, lb/100 sq feet 9

SG of mud 1.14

15' gel, lb/100 sq feet 40

Hydrostatic pressure, psi 4331.75

Fluid loss, cc 7.5

SPM 140

Cake thikness, mm 1

Pump liner, inch 6.5

Sand, % 0.1

Stroke length, inch 10

pH 9.5

Pump output, GPS 3.59

Salinity, ppm 1000

SPP, psi 2000

MBC, cc 0

Pump eff, % 95

Lubricity coeff. 0.2344

Nozzle area, sq. inch 0.993515625

Oil content, % 4

Flow Rate, GPM 477.31

Total solid, % 12

Jet Velocity, feet/sec 153.65

Water, % 84

BHHP 56.19 Ɵ600 52

SHHP 556.96 Ɵ300 36

Hydraulic ratio 0.10 Ɵ3 10

Hydraulic Impact Force, lb 360.70

n 0.53

HSI 0.99

k, cp 6.74

23

Pressure loss at bit, psi 201.77

Low gravity solid, %(V/V) 14.9067

Total ann pressure loss, psi 232.92

High gravity solid, %(V/V) -2.9067

Total Drillstring pr loss, psi 684.51

Annular volume, bbl 421.10

Annular velocity, feet/min

String volume, bbl 149.10

Casing Vs DP 232.43

Hole volume, bbl 570.20

OH vs DP 247.72

Bottom up time, min 37.05

OH vs 6.5" DC/Jar/NMDC 390.16

Cycle time, min 94.17

PIPE STUCK REPORT

Loc: HYS

Date: 27.02.2017

Date of Pipe Stuck 27.02.2017 Date of Oil Spotting 27.02.2017

Well Depth (m) 2703 Well operation Oil String Drilling

Stuck Depth 2694 Formation Tipam

Hole Size (inch) 8 ½

BHA Mud parameters

Bit (TCR) 0.23 Weight 71

6 ¾” Motor 8.02 Viscosity 49

6 ¾” F. Sub

W/Valve 0.80 AV 26

8” String Stab 1.75 PV 16

6 ¾” NMDC 9.48 YP 22

6 ¾” Saver Sub 0.64 0/10 gel 9/40

6 ¾” MWD 0.67 API F/Loss 7.5

6 ¾” NMDC 7.41 Sheath 1.0

X/O 0.88 Sand 0.1

6 ½” DC 9.35 pH 9.0

XO 0.88 Salinity 900

6 ½” Drilling Jar 5.23 Oil/Solid 4/12

XO 0.84

6 X 6 ½” D.C. 56.17

XO 0.93

5” HWDP 141.47

Total 244.75

Incident:

Drilling was continued from 2694m to 2703m using TCR (1-1-7) with Almansoori deviation BHA.

While picking up the string for reaming before new connection observed tight pull @ 2691m. Tried

to release the same (Max Weight 180T), but failed and pipe got stuck at depth 2691m. Worked on

string in the range 180T-60T without success.

Action Taken immediately after stuck:

A hi-viscous lubricating pill was pumped with continuous working on string in the range 180T-30T

without success.

24

Observations:

i. Normal circulation with normal return.

ii. Normal pressure behaviour during circulation.

iii. No cutting / caving was observed on shaker screens during circulation.

Oil spotting:

A 50bbl of HSD pill treated with 5% Pipelax was pumped and displaced with 121bbl of 71pcf mud

covering 382m in annulus & keeping 10bbl inside string. Allowed to soak for 6 hrs with keeping the

string in compression. Worked on string & pipe got released @ 170 T. PO two DP singles with

pump on and then circulated out oil to condition mud system.

Remarks:

The stuck seems to be differential one as the mud weight was just raised to 71pcf from 70pcf

considering policy schedule.

25

Caliper Analysis :

26

Deviation Profile of the well/Course of the hole

27

28

Day vs Depth Curve

29

30

CONDUCTOR CEMENTATION REPORT

LOC: HYS ; RIG : S-6

Date of Cementation : 27.01.2017 Pump Data

Drilled Depth : 156 m

Casing Shoe : 154.47 m Liner Size : 7.0 inch

ART : 1.60 m Length : 12 inch

Liner Volume : 4.994 gal/stk

Pump Efficiency : 95%

Cement Details

a) Quantity of cement : 700bag, 24.5MT

b) Type of cement : N.S. Dalmia Class-G cement

c) Percentage of grout : 50%

d) Recommended density : 114pcf

e) Average cement slurry density : 113.15pcf

f) Gauging water treatment : Plain water

g) Displacement volume : 66 bbl

Operational Timings

a) Casing Landing Time : 5:00 am

b) Circulation : 5:30 am-12:05 pm = 06 hr 35 min

c) Pre-Flush : 12:20 pm-12:25 pm = 05 min

d) Cement Pump : 12:30 pm-12:50 pm = 10 min

e) Displacement : 12:55 pm-01:05 pm = 10 min

Operational Brief

RI 13 3/8" casing and landed with shoe at 154.47 m. Cemented the same by using 700 bags of N.S.

Dalmia class G cement. Pumped 1000 gal of plain water as pre-flush. Average C/slurry weight was 113.15

pcf. Displaced C/slurry with 65 bbl of 66 pcf mud keeping 5 m under displaced. Contaminated C/slurry of

111 pcf (max) was surfaced out in return.WOC.

Remarks

a) Safety talk was conducted and PPE were distributed amongst the field personnel and WCLs prior to the

operation

b) Cement slurry was appeared to be thin devoid of any foam.

c) Average C/slurry weight was 113.15 pcf against recommended weight of 114 pcf.

d) The overall operation was smooth.

e) Max c/slurry of 111 pcf surfaced out in return.

31

ISOLATION CASING CEMENTATION REPORT

LOC: HYS; RIG: S-6

Date of Cementation: 15.02.2017 Pump Data

Drilled Depth: 2112m Type: AI400-PT

Loggers Depth: 2112m Liner Size: 7”, Length:

10” Casing Shoe Depth: 2108.38m

Liner Volume: 4.16 gal/stk Float

Collar Depth: 2095.7m PE before cementation:

95% ART: 1.6m

Cement Details

h) Quantity of cement : [1800bag, 63MT (L) + 500bag, 17.5MT (T)] = 2300bag,

80.5MT

i) Type of cement : API Class-G NS Dalmia

j) Percentage of grout : 76%(L) + 50%(T)

k) Recommended density : 102pcf (L) + 114pcf (T)

l) Average cement slurry density : 101.6pcf (L) & 113.7pcf (T)

m) Gauging water treatment (BWOW): 0.658% Bentonite + 0.263% DO-13 for both Lead & Tail

slurry

n) Displacement volume : 440 bbl (Imp)

o) Plug Bumped (Strokes/Pressure) : 4397stk @1950psi.

Operational Timings

f) Casing Landing time : 09:00 am

g) Circulation : 09:20 am – 12.20 pm = 03 hr

h) Pre-Flush pumping : 01.54 pm – 02:05 pm = 11 min

i) Cement Pumping : 02:35 pm – 03:55 pm = 1hr 20 min (L)

03:57 pm – 04:27 pm = 30 min (T)

j) Displacement : 04:44 pm – 05:24 pm = 40 min

Operational Brief

After successfully landing 9 5/8” casing with shoe @2108.38m and F/C @2095.7m,

established circulation @28 SPM and 450psi. Circulated and conditioned mud for 03hr. Pumped

2000gal of plain water treated with 1% ASPP & 0.5% Teepol as pre-flush. Cementing was done on

the fly by using 2300bag of API Class-G NS Dalmia cement. Average cement slurry density was

101.6pcf (L) & 113.7pcf (T). Displaced cement slurry with 440 bbls of 68pcf mud. Plug caught TE

@1526 strokes & bumped at 4397 strokes against calculated 4234 strokes @1950psi (Pump

efficiency: 96.3%). Contaminated cement slurry of 104 (max) pcf was surfaced out in return. BPV

was holding.

Remarks

f) Safety talk was conducted and PPE were distributed amongst the field personnel and WCLs

prior to the operation.

g) Cement slurry appeared to be thin devoid of any foam.

h) Both MP-01 and MP-02 was used for displacement.

i) The overall operation was smooth and safe.

j) C/Slurry of 104pcf (max) surfaced out in return.

k) BPV holding OK.

32

5 1/2” OIL STRING CEMENTATION REPORT

LOC: HYS

Date of cementing : 12.03.2017 Pump Data

Drilled Depth : 3085 m Type : A-1400 PT

Casing Shoe : 3081.32 m Liner size : 6.5”

Float Collar : 3057.49 m Stroke length : 10”

ART : 1.05 m GPS : 3.589

Cement & Gauging Water Formulation and treatment:

a) Quantity of cement : 2200 bags (77 MT)

b) Type of cement : NS Dalmia cement

c) Average cement slurry wt. : 102pcf (lead) & 118pcf (tail)

d) Gauging water : Prepared by SLB cementing section

e) Preflush : 50 US bbl Water (Treated with 1% ASPP + 0.5% Teepol)

f) Weighted spacer : 50 US bbls of density 93.5pcf (Prepared by

Schlumberger)

g) Displacement Volume : 222.5 US bbls of mud

h) Pump efficiency during cementing: 94.5%

Operational Brief:

Cemented 5 1/2" casing with shoe @3081.32 (F/C @3057.49m) using 2200 bags of API class G

Dalmia cement blended by SLB. Pumped 50 US bbls of pre-flush (1% ASPP+0.5% Teepol)

followed by 50 US bbls of 93.5pcf spacer. Pumped cement slurry of density 102pcf (lead) and

118pcf (tail) using SLB cementing unit. Displaced the cement slurry with 222.5 US bbls of 70 pcf

mud. Plug bumped at 2800psi and 2294 stks against calculated 2168 stks. Pump efficiency was

94.5%. BPV holding OK. WOC.

Observations:

1. Cementing was done by Schlumberger Cementing unit.

2. Gauging water was also prepared by Schlumberger crew.

3. Cement displacement was done by using both the Mud Pumps.

4. Plug bumped at 2800psi.

5. BPV holding OK.

Dipankar Dutta

Sr. Chemist

LOC: HYS

33

DRILLING, CASING & CEMENTING DATA LOC. HYS

HO

LE

SIZ

E

(IN

CH

)

PLAN

NED

DEPT

H

(M)

DRILLED

DEPTH

(M)

DEVI

-

ATIO

N

CASING

SHO

E

AT

(M)

FLO

AT

COL

LAR

AT

(M)

TYPE

OF

CEME

NT

USED

QUANTI

TY

MT/BAG

S

SLURRY WEIGHT

(LBS/CFT)

CEMENT RISE

(M)

TREATM

ENT

(BWOW) SIZ

E

(inc

h)

W

T

(p

pf

)

RECOM

ENDED

ACTUA

L

PLANNED

ACTUAL

17

½ 150 156

J-

Bend

13

3/8 68

154.4

7 -

N.S.

Dalmia class

G

cement

24.5/

700 114 113.15

Surface

d

Contaminat

ed cement

surfaced (111pcf)

Plain

water

12

¼ 2175 2112

J-

Bend

9

5/8 47

2108.

38

2095.

7

API CLAS

S G

63 /

1800 (L)

17.5 / 500 (T)

L=102

T=114

L=101.6

T=113.7

Surface

d

Contaminat

ed cement

surfaced (104pcf)

0.658%

Bentonite

+ 0.263 % DO-13

for both

Lead & Tail

8 1/2

3082 3085 J-

Bend 5 ½ 20

3081.32

3057.49

API

CLAS

S G blende

d by

SLB

77/ 2200

102 (L)

118 (T)

102+ 118(pre

mixed)

- -

Treatment

by SLB

Unit

CEMENDRILLING STAGES Conductor Isolation

Oil string

1.PREFLUSH VOLUME

(FORMULATION& VOLUME)

1000 GAL PLAIN WATER

2000GAL, 1% ASPP+0.5% TEEPOL

2000 GAL, 1% ASPP+0.5% TEEPOL

2. DISPLACEMENT VOLUME

(KL/BBL) 12.01/ 66 80.08 / 440 35.37 / 194.38

3.TIME REQUIRED FOR

PUMPING

C/SLURRY/DISPLACEMENT

10min/10min 80 (L)min +30 (T)min / 40min

No record

4. PLUG CAUGHT TRAILING

END OF CEMENT SLURRY AT

(STROKES)

-

1526

No record

5. PLUG BUMPED AT

(STROKES)

- 4397 @ 1950 psi 2294@ 2800 psi

6. CALCULATED STROKES - 4234 2168

7. BPV HOLDING OK – YES/NO - YES YES

8. PUMP EFFICIENCY BEFORE/

DURING CEMENTATION

- 95% / 96.3 % 95% / 94.5%