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Reservoir Geom

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2020
Constants value unit g 10.0 m/s² ρSeaWater  1.0 g/cc ρSeaFloor  1.7 g/cc ρPoreFluid  1.0 g/cc ρMatrix  2.7 g/cc  Part 1: Compute the ove rburde n stress a nd ove rbu rd a. Plot density vs. depth for each dataset . It is con venti approximate g, acceleration due to gravity. Notice that reasonable density for sediments at the Earth’s surface since the well is offshore, use a dens ity of 1.0 g /cc fro sediments. Again extrapolate from this point to the firs b. Divide the density profiles into 5 blocks . By c onsideri approximately constant density. Compute the average c. Calculate the overburden stress. Calculate and plot t profiles. On the same plots, show the hydrostatic pore d. Calculate the overburden gradient (overburden stres both the continuous and blocked density  profiles. Part 2: Compute porosity from density logs a. Compute porosity assuming complete saturation an  ρlog = (1-ϕ)  ρmatrix + ϕρ  fluid where ρlog is the log density, ϕ is the porosity, ρmatr i pore fluid (use 1.0 g/cc). b. Plot porosity vs. depth for each da taset . Calculate an
Transcript
Part 1: Compute the overburden stress and overburd
a. Plot density vs. depth for each dataset . It is conventi
approximate g, acceleration due to gravity. Notice that
reasonable density for sediments at the Earth’s surface
since the well is offshore, use a density of 1.0 g/cc fro
sediments. Again extrapolate from this point to the firs
b. Divide the density profiles into 5 blocks. By consideri
approximately constant density. Compute the average
c. Calculate the overburden stress. Calculate and plot t
profiles. On the same plots, show the hydrostatic pore
d. Calculate the overburden gradient (overburden stres
both the continuous and blocked density profiles.
Part 2: Compute porosity from density logs
a. Compute porosity assuming complete saturation an
 ρlog = (1-) ρmatrix + ρ fluid
where ρlog is the log density, is the porosity, ρmatri
pore fluid (use 1.0 g/cc).
 
  en gradients
onal to put depth on an inverted y-axis and density on the x-axis. Use 10.0 m/s2 to
the density measurements are not continuous to the surface. For the Barnett data, assume a
and extrapolate by whichever method to the first measurement point. For the GOM data,
the surface to the sea floor (1000 ft) and a density of 1.7 g/cc for the shallowest seafloor
t point in the data set.
ng the variations of density in each profile, designate 5 blocks representing sections of
density in each block and plot blocked density vs. depth for each data set.
e overburden stress for each data set using both the continuous and blocked density
pressure for each case.
s normalized by depth). Calculate and plot the overburden gradient for each data set using
hydrostatic pore pressure.
is the density of the sedimentary reservoir rock (use 2.7 g/cc), and ρ fluid is density of the
 
Depth(m) Depth(ft) Density (g/cc) ΔD(m)   Sv(Pa) Sv(Mpa) PpHyd(Mpa) Gov(Mpa/km)
0.0 0 1.8595 0 0 0 0 0
28.8 94.5 1.8595 28.8 535613.3 0.535613 0.288036 18.59535802
29.0 95 1.8778 0.2 538475 0.538475 0.28956 18.5963193
29.1 95.5 1.8778 0.2 541336.8 0.541337 0.291084 18.59727051
29.3 96 1.8778 0.2 544198.6 0.544199 0.292608 18.59821181
29.4 96.5 1.8778 0.2 547060.3 0.54706 0.294132 18.59914335
29.6 97 1.8778 0.2 549922.1 0.549922 0.295656 18.60006529
29.7 97.5 1.8778 0.2 552783.9 0.552784 0.29718 18.60097778
29.9 98 1.8778 0.2 555645.6 0.555646 0.298704 18.60188095
30.0 98.5 1.8778 0.2 558507.4 0.558507 0.300228 18.60277496
30.2 99 1.8778 0.2 561369.2 0.561369 0.301752 18.60365993
30.3 99.5 1.8778 0.2 564230.9 0.564231 0.303276 18.60453601
30.5 100 1.8778 0.2 567092.7 0.567093 0.3048 18.60540333
30.6 100.5 1.8778 0.2 569954.5 0.569954 0.306324 18.60626202
30.8 101 1.8709 0.2 572805.7 0.572806 0.307848 18.60677063
30.9 101.5 1.8317 0.2 575597.2 0.575597 0.309372 18.60534319
31.1 102 1.8363 0.2 578395.7 0.578396 0.310896 18.60415523
31.2 102.5 1.85 0.2 581215.1 0.581215 0.31242 18.60364715
31.4 103 1.8441 0.2 584025.6 0.584026 0.313944 18.60285761
31.5 103.5 1.8299 0.2 586814.3 0.586814 0.315468 18.60138969
31.7 104 1.8303 0.2 589603.7 0.589604 0.316992 18.59995513
31.9 104.5 1.8555 0.2 592431.5 0.592431 0.318516 18.59974003
32.0 105 1.8603 0.2 595266.6 0.595267 0.32004 18.59975556
32.2 105.5 1.8491 0.2 598084.6 0.598085 0.321564 18.59924013
32.3 106 1.8387 0.2 600886.8 0.600887 0.323088 18.59823899
32.5 106.5 1.8514 0.2 603708.3 0.603708 0.324612 18.59784351
32.6 107 1.8729 0.2 606562.6 0.606563 0.326136 18.59845639
32.8 107.5 1.8746 0.2 609419.5 0.60942 0.32766 18.59914264
32.9 108 1.8667 0.2 612264.4 0.612264 0.329184 18.59945679
33.1 108.5 1.8845 0.2 615136.3 0.615136 0.330708 18.60058833
33.2 109 1.8826 0.2 618005.4 0.618005 0.332232 18.60162232
33.4 109.5 1.8585 0.2 620837.8 0.620838 0.333756 18.60154642
33.5 110 1.8671 0.2 623683.2 0.623683 0.33528 18.60186212
33.7 110.5 1.8748 0.2 626540.4 0.62654 0.336804 18.60252338
33.8 111 1.8761 0.2 629399.6 0.6294 0.338328 18.60323724
34.0 111.5 1.8577 0.2 632230.7 0.632231 0.339852 18.60311958
34.1 112 1.8705 0.2 635081.4 0.635081 0.341376 18.6035744
34.3 112.5 1.8495 0.2 637900 0.6379 0.3429 18.60309185
34.4 113 1.8415 0.2 640706.5 0.640706 0.344424 18.60225959
34.6 113.5 1.8846 0.2 643578.6 0.643579 0.345948 18.60333333
34.7 114 1.8622 0.2 646416.6 0.646417 0.347472 18.6034152
34.9 114.5 1.8094 0.2 649174.1 0.649174 0.348996 18.60119068
35.1 115 1.8132 0.2 651937.4 0.651937 0.35052 18.59915072
35.2 115.5 1.8203 0.2 654711.6 0.654712 0.352044 18.59743579
35.4 116 1.8302 0.2 657500.8 0.657501 0.353568 18.59616236
35.5 116.5 1.8259 0.2 660283.5 0.660283 0.355092 18.59471531
35.7 117 1.8495 0.2 663102.1 0.663102 0.356616 18.59428917
 = (  ρlog - ρmatrix)/(
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Density 0.0
0.0
200.0
400.0
600.0
800.0
1000.0
1200.0
1400.0
1600.0
1800.0
2000.0
 
Porosity
94.5 1.8595 block2 146.5 700
95 1.8778 Média das 100 medidas block3 700.5 5600
95.5 1.8778 1.859536 block4 5600.5 5900
96 1.8778 block5 5900.5 6200
96.5 1.8778 Depth(m) Depth(ft) Density (g/cc) ΔD(m)
97 1.8778 0.0 0 1.8640 0
97.5 1.8778 28.8 94.5 1.8640 28.8
98 1.8778 29.0 95 1.8640 0.2
98.5 1.8778 29.1 95.5 1.8640 0.2
99 1.8778 29.3 96 1.8640 0.2
99.5 1.8778 29.4 96.5 1.8640 0.2
100 1.8778 29.6 97 1.8640 0.2
100.5 1.8778 29.7 97.5 1.8640 0.2
101 1.8709 29.9 98 1.8640 0.2
101.5 1.8317 30.0 98.5 1.8640 0.2
102 1.8363 30.2 99 1.8640 0.2
102.5 1.85 30.3 99.5 1.8640 0.2
103 1.8441 30.5 100 1.8640 0.2
103.5 1.8299 30.6 100.5 1.8640 0.2
104 1.8303 30.8 101 1.8640 0.2
104.5 1.8555 30.9 101.5 1.8640 0.2
105 1.8603 31.1 102 1.8640 0.2
105.5 1.8491 31.2 102.5 1.8640 0.2
106 1.8387 31.4 103 1.8640 0.2
106.5 1.8514 31.5 103.5 1.8640 0.2
107 1.8729 31.7 104 1.8640 0.2
107.5 1.8746 31.9 104.5 1.8640 0.2
108 1.8667 32.0 105 1.8640 0.2
108.5 1.8845 32.2 105.5 1.8640 0.2
109 1.8826 32.3 106 1.8640 0.2
109.5 1.8585 32.5 106.5 1.8640 0.2
110 1.8671 32.6 107 1.8640 0.2
110.5 1.8748 32.8 107.5 1.8640 0.2
111 1.8761 32.9 108 1.8640 0.2
111.5 1.8577 33.1 108.5 1.8640 0.2
112 1.8705 33.2 109 1.8640 0.2
112.5 1.8495 33.4 109.5 1.8640 0.2
113 1.8415 33.5 110 1.8640 0.2
113.5 1.8846 33.7 110.5 1.8640 0.2
114 1.8622 33.8 111 1.8640 0.2
114.5 1.8094 34.0 111.5 1.8640 0.2
115 1.8132 34.1 112 1.8640 0.2
115.5 1.8203 34.3 112.5 1.8640 0.2
116 1.8302 34.4 113 1.8640 0.2
116.5 1.8259 34.6 113.5 1.8640 0.2
117 1.8495 34.7 114 1.8640 0.2
117.5 1.8459 34.9 114.5 1.8640 0.2
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
6184 2.0565
6184.5 2.0624
6185 2.0648
6185.5 2.065
6186 2.065
6186.5 2.065
6187 2.065
6187.5 2.065
6188 2.065
6188.5 2.065
6189 2.065
6189.5 2.065
6190 2.0651
6190.5 2.0653
6191 2.0663
6191.5 2.0703
6192 2.0857
6192.5 2.1434
6193 2.3314
6193.5 2.6056
 
 
1000 1.000 extrapolação 305.1
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
6031 2.186 1072.0
6032 2.182 1072.3
6033 2.208 1072.6
6034 2.207 1072.9
6035 2.202 1073.2
6036 2.191 1073.5
6037 2.196 1073.8
6038 2.19 1074.1
0 1 0 0 0 0 0
1000 1 304.8 3048000 3.048 3.048 10
1001 1.7 0.3 3053182 3.053182 3.051048 10.00699 0.5882
1001 1.698 0.0 3053182 3.053182 3.051048 10.00699 0.5892
1002 1.699 0.3 3058359 3.058359 3.054096 10.01396 0.5891
1003 1.699 0.3 3063537 3.063537 3.057144 10.02091 0.5889
1004 1.699 0.3 3068717 3.068717 3.060192 10.02786 0.5887
1005 1.700 0.3 3073897 3.073897 3.06324 10.03479 0.5885
1006 1.700 0.3 3079078 3.079078 3.066288 10.04171 0.5883
1007 1.700 0.3 3084260 3.08426 3.069336 10.04862 0.5881
1008 1.701 0.3 3089444 3.089444 3.072384 10.05553 0.5879
1009 1.701 0.3 3094628 3.094628 3.075432 10.06242 0.5877
1010 1.701 0.3 3099813 3.099813 3.07848 10.0693 0.5876
1011 1.701 0.3 3104999 3.104999 3.081528 10.07617 0.5874
1012 1.702 0.3 3110186 3.110186 3.084576 10.08303 0.5872
1013 1.702 0.3 3115374 3.115374 3.087624 10.08988 0.5870
1014 1.702 0.3 3120563 3.120563 3.090672 10.09671 0.5868
1015 1.703 0.3 3125753 3.125753 3.09372 10.10354 0.5866
1016 1.703 0.3 3130944 3.130944 3.096768 10.11036 0.5864
1017 1.703 0.3 3136136 3.136136 3.099816 10.11717 0.5862
1018 1.704 0.3 3141329 3.141329 3.102864 10.12397 0.5861
1019 1.704 0.3 3146523 3.146523 3.105912 10.13075 0.5859
1020 1.704 0.3 3151718 3.151718 3.10896 10.13753 0.5857
1021 1.705 0.3 3156913 3.156913 3.112008 10.1443 0.5855
1022 1.705 0.3 3162110 3.16211 3.115056 10.15105 0.5853
1023 1.705 0.3 3167308 3.167308 3.118104 10.1578 0.5851
1024 1.706 0.3 3172507 3.172507 3.121152 10.16454 0.5849
1025 1.706 0.3 3177706 3.177706 3.1242 10.17126 0.5848
1026 1.706 0.3 3182907 3.182907 3.127248 10.17798 0.5846
1027 1.707 0.3 3188108 3.188108 3.130296 10.18469 0.5844
1028 1.707 0.3 3193311 3.193311 3.133344 10.19138 0.5842
1029 1.707 0.3 3198514 3.198514 3.136392 10.19807 0.5840
1030 1.707 0.3 3203719 3.203719 3.13944 10.20475 0.5838
1031 1.708 0.3 3208924 3.208924 3.142488 10.21141 0.5836
1032 1.708 0.3 3214130 3.21413 3.145536 10.21807 0.5835
1033 1.708 0.3 3219338 3.219338 3.148584 10.22472 0.5833
1034 1.709 0.3 3224546 3.224546 3.151632 10.23135 0.5831
1035 1.709 0.3 3229755 3.229755 3.15468 10.23798 0.5829
1036 1.709 0.3 3234965 3.234965 3.157728 10.2446 0.5827
1037 1.710 0.3 3240176 3.240176 3.160776 10.2512 0.5826
1038 1.710 0.3 3245388 3.245388 3.163824 10.2578 0.5824
1039 1.710 0.3 3250601 3.250601 3.166872 10.26439 0.5822
1040 1.711 0.3 3255815 3.255815 3.16992 10.27097 0.5820
1041 1.711 0.3 3261030 3.26103 3.172968 10.27754 0.5818
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Original Data
0.0
500.0
1000.0
1500.0
2000.0
2500.0
3000.0
3500.0
4000.0
4500.0
 
  tle

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