35 4 2016 12 GLOBAL GEOLOGY Vol. 35 No. 4 Dec. 2016 1004 5589 2016 04 1084 11 C 130061 70% 50% 38% P618. 130. 2 A doi 10. 3969 /j. issn. 1004-5589. 2016. 04. 019 Analysis of oil saturation and oil-bearing level in block-c of Luxiang fault depression ZHAO Shi-le CHENG Ri-hui JIANG Fei XU Zhong-jie LIU Bai-yi College of Earth Sciences Jilin University Changchun 130061 China Abstract The comprehensive study of lithology oil-bearing level and oil saturation of the 2nd Member of Shuangyang Formation established the suitable calculation method of oil saturation for block-c. The effect of deposition and structure on oil-bearing level was analyzed compared with actual oil-bearing level. Oil reservoir rocks of the 2nd Member of Shuangyang Reservoirs in the studied area are mainly siltstone fine sandstone and glutenite. Oil levels of reservoirs are all above fluorescence. Most of calculated oil saturations based on Archie are consistent with the actual oil saturation. Oil saturation of 70% 50% and 38% are regarded as the distinguishing criteria for gas layer oil layer oil-water layer and water layer. The oil-bearing level of reservoirs in the studied area is controlled by both deposition and structure. The deposition mainly controls rock textures and physical properties of the reservoir while structure controls hydrocarbon accumulation i. e. the actual oil saturation in structural highs is higher than the calculated result while in structural lows is lower than the calculated result. Key words sandstone reservoirs oil saturation oil-bearing level Shuangyang Formation Luxiang fault depression Yingtong Basin 2016-04-18 2016-09-27 40972074 41402087. 1963-. E-mail chengrh@ jlu. edu. cn
4 C 1085 0 1 C 1 2 S C 3-5 3 C > 2 000 m 6 C 5 20 43 1 1 C 2012 1 Fig. 1 Geological sketch map of block-c in Yitong Basin
1086 35 1 C Φ = A Δt + B 1 Table 1 Scheme comparison table of small layer division in block-c in 2nd member of Shuangyang Formation A B S 2 Ⅰ Ⅰ1 Ⅰ1-1 Ⅰ1-2 Ⅰ1-3 C X Ⅰ2 Ⅰ2-1 Ⅰ2-2 Ⅰ2-3 Φ = 0. 202 4 Δt - 36. 37 Ⅰ3 Ⅰ3-1 Ⅰ3-2 S 2 Ⅱ Ⅱ1 Ⅱ1-1 Ⅱ1-2 Ⅱ2 Ⅱ2-1 Ⅱ2-2 S 2 Ⅲ Ⅲ1 Ⅲ1-1 Ⅲ1-2 Ⅲ1-3 Ⅲ2 Ⅲ2-1 Ⅲ2-2 Ⅲ3 Ⅲ3-1 Ⅲ3-2 Ⅲ3-3 Ⅲ4 Ⅲ4-1 Ⅲ4-2 S 2 Ⅳ Ⅳ1 Ⅳ1-1 Ⅳ1-2 Ⅳ2 Ⅳ2-1 Ⅳ2-2 Ⅳ3 Ⅳ3-1 Ⅳ3-2 Ⅳ4 Ⅳ4-1 Ⅳ4-2 Ⅳ5 Ⅳ5-1 Ⅳ5-2 S 2 Ⅴ Ⅴ1 Ⅴ1-1 Ⅴ2 Ⅴ2-1 Ⅴ2-2 Ⅴ3 Ⅴ3-1 Ⅴ3-2 Ⅴ4 Ⅴ4-1 Ⅴ4-2 Ⅴ5 Ⅴ5-1 Ⅴ5-2 Ⅴ6 Ⅴ6-1 Ⅴ6-2 K = 0. 003 2 e 0. 581 2Φ 2 K md Φ 0. 7 Krchie 13-15 I = R t R 0 F = R 0 R w = a Φ m = b S n w = b 1 - S 0 n 3 4 2 S 0 = 1 - S w 5 3 ~ 5 6 S 0 a b m n R w Ω m Φ % R t Ω m n abr w So = 1-6 槡 Φ m Rt K b m n C 7-9 X C K = 0. 907 4 b = 0. 701 2 m = 1. 701 9 n = 1. 912 9 3 809. 1 ~ 4 965. 7 mg /L 90. 0 ~ 471. 5 mg /L ph 7 ~ 10 R w = 0. 5 Ω m R t Φ 10 11 2 Φ Δt 12
4 C 1087 Table 2 2 S12 S2I II2 Saturation calculations of II2 layer in S2I sand group of Well S12 Part of the data /m Rt /Ωm AC /μs m - 1 Por /% Perm /md Sw /% So /% 1 867. 000 28. 070 240. 456 12. 298 4. 068 62. 02 37. 98 1 867. 125 30. 378 239. 743 12. 154 3. 741 60. 14 39. 86 1 867. 250 32. 608 239. 777 12. 161 3. 756 57. 93 42. 07 1 867. 375 34. 817 239. 796 12. 165 3. 764 55. 96 44. 04 1 867. 500 34. 759 239. 266 12. 057 3. 537 56. 45 43. 55 1 867. 625 33. 328 239. 564 12. 118 3. 663 57. 45 42. 55 1 867. 750 31. 906 239. 937 12. 193 3. 827 58. 45 41. 55 1 867. 875 30. 475 240. 472 12. 302 4. 076 59. 40 40. 60 1 868. 000 29. 000 241. 027 12. 414 4. 351 60. 47 39. 53 1 868. 125 28. 767 240. 340 12. 275 4. 013 61. 34 38. 66 1 868. 250 29. 949 239. 918 12. 189 3. 819 60. 43 39. 57 1 868. 375 31. 106 239. 035 12. 011 3. 442 60. 03 39. 97 1 868. 500 32. 257 237. 862 11. 773 2. 998 59. 96 40. 04 1 868. 625 32. 957 237. 168 11. 633 2. 763 59. 93 40. 07 1 868. 750 33. 050 237. 695 11. 739 2. 940 59. 35 40. 65 1 868. 875 32. 928 238. 734 11. 950 3. 322 58. 54 41. 46 1 869. 000 32. 519 239. 017 12. 007 3. 435 58. 67 41. 33 1 869. 125 31. 291 238. 473 11. 897 3. 222 60. 35 39. 65 1 869. 250 30. 028 239. 283 12. 061 3. 544 60. 92 39. 08 1 869. 375 28. 777 241. 617 12. 533 4. 663 60. 20 39. 80 1 869. 500 27. 838 244. 593 13. 136 6. 618 58. 75 41. 25 1 869. 625 28. 433 245. 561 13. 332 7. 416 57. 34 42. 66 1 869. 750 29. 652 245. 157 13. 250 7. 072 56. 40 43. 60 1 869. 875 28. 329 243. 234 12. 861 5. 640 59. 32 40. 68 1 870. 000 25. 681 242. 785 12. 770 5. 350 62. 84 37. 16 1 870. 125 22. 995 243. 824 12. 980 6. 046 65. 61 34. 39 1 870. 250 21. 574 245. 502 13. 320 7. 365 66. 30 33. 70 1 870. 375 22. 366 247. 437 13. 711 9. 248 63. 40 36. 60 1 870. 500 20. 612 248. 746 13. 976 10. 787 65. 05 34. 95 1 870. 625 18. 717 249. 885 14. 207 12. 334 67. 43 32. 57 1 870. 750 20. 747 250. 638 14. 359 13. 476 63. 29 36. 71 1 870. 875 25. 875 249. 616 14. 152 11. 950 57. 12 42. 88 1 871. 000 30. 303 248. 837 13. 995 10. 903 53. 12 46. 88 1 871. 125 31. 712 246. 203 13. 461 7. 998 53. 70 46. 30 1 871. 250 32. 940 243. 560 12. 927 5. 861 54. 57 45. 43 1 871. 375 34. 266 242. 999 12. 813 5. 487 53. 88 46. 12 1 871. 500 34. 952 243. 735 12. 962 5. 983 52. 78 47. 22 1 871. 625 33. 709 245. 559 13. 331 7. 415 52. 46 47. 54
1088 35 2 /m Rt /Ωm AC /μs m - 1 Por /% Perm /md Sw /% So /% 1 871. 750 32. 583 247. 573 13. 739 9. 397 51. 99 48. 01 1 871. 875 35. 487 249. 339 14. 096 11. 567 48. 60 51. 40 1 872. 000 41. 135 248. 630 13. 953 10. 641 45. 40 54. 60 1 872. 125 48. 464 246. 546 13. 531 8. 327 42. 82 57. 18 1 872. 250 61. 530 245. 586 13. 337 7. 438 38. 29 61. 71 1 872. 375 65. 709 245. 543 13. 328 7. 401 37. 02 62. 98 1 872. 500 61. 345 245. 530 13. 325 7. 389 38. 38 61. 62 1 872. 625 61. 766 245. 224 13. 263 7. 128 38. 40 61. 60 1 872. 750 69. 605 243. 441 12. 902 5. 779 36. 97 63. 03 1 872. 875 77. 422 241. 697 12. 549 4. 707 35. 84 64. 16 1 873. 000 80. 324 239. 544 12. 114 3. 654 36. 28 63. 72 1 873. 125 77. 031 238. 008 11. 803 3. 050 37. 95 62. 05 1 873. 250 73. 549 235. 757 11. 347 2. 341 40. 27 59. 73 1 873. 375 70. 090 233. 940 10. 979 1. 890 42. 52 57. 48 1 873. 500 70. 676 232. 661 10. 721 1. 626 43. 25 56. 75 1 873. 625 72. 698 232. 150 10. 617 1. 531 42. 98 57. 02 1 873. 750 74. 021 232. 466 10. 681 1. 589 42. 35 57. 65 1 873. 875 74. 569 233. 606 10. 912 1. 817 41. 40 58. 60 1 874. 000 75. 925 234. 361 11. 065 1. 986 40. 50 59. 50 1 874. 125 78. 260 234. 721 11. 138 2. 072 39. 63 60. 37 1 874. 250 77. 647 233. 868 10. 965 1. 874 40. 35 59. 65 1 874. 375 74. 579 232. 837 10. 756 1. 660 41. 93 58. 07 1 874. 500 74. 881 232. 229 10. 633 1. 546 42. 27 57. 73 1 874. 625 78. 645 231. 336 10. 452 1. 391 41. 83 58. 17 1 874. 750 82. 308 230. 186 10. 220 1. 215 41. 67 58. 33 1 874. 875 85. 933 230. 827 10. 349 1. 311 40. 29 59. 71 1 875. 000 88. 469 232. 700 10. 728 1. 634 38. 43 61. 57 1 875. 125 87. 621 235. 566 11. 309 2. 289 36. 86 63. 14 1 875. 250 85. 823 237. 845 11. 770 2. 992 35. 96 64. 04 1 875. 375 84. 047 239. 179 12. 040 3. 501 35. 63 64. 37 1 875. 500 82. 258 240. 262 12. 259 3. 976 35. 46 64. 54 1 875. 625 80. 509 239. 642 12. 134 3. 697 36. 19 63. 81 1 875. 750 81. 431 240. 461 12. 299 4. 070 35. 54 64. 46 1 875. 875 87. 678 242. 391 12. 690 5. 108 33. 25 66. 75 1 876. 000 93. 825 244. 966 13. 211 6. 915 30. 97 69. 03 1 876. 125 99. 682 247. 174 13. 658 8. 966 29. 13 70. 87 1 876. 250 89. 508 249. 319 14. 092 11. 539 29. 97 70. 03 1 876. 375 66. 467 251. 459 14. 525 14. 843 34. 08 65. 92 Rt = AC = Por = Perm = Sw = So =.
4 C 1089 3 3. 1 4-53. 94% 53. 72% 2 2 C S9 S17 Fig. 2 Lithological distribution histogram of debris logging in block-c 94. 31% 94. 09% 18 168-3 4 5 4 a S9 - P3-7 1 892. 34 ~ 1 892. 47 m b S17 - P11-1 1 958. 63 ~ 1 958. 76 m Fig. 3 3 Rock characteristics on drill core in the 2nd member of Shuangyang Formation Fig. 4 4 S9 S17 5 C Lithological distribution histogram of S9 and S17 Fig. 5 Distribution histogram of oil-bearing occurrence coring in the 2nd member of block-c
1090 35 3. 2 16-18 22 Ω. 6 M 240 μs /m 38% Fig. 6 6 C Cross-plot of deep lateral resistivity and porosity in the 2nd member of block-c 4 4. 1 Ⅲ3-1 70% 50% 38% C Ⅲ 3-1 7 Ⅲ3-1 Ⅲ3-1 Ⅳ5-2 70% 70% ~ 50% S13 - S18 - S24 S27 S26 S7 50% ~ 70% 8 Ⅱ2-2 38% ~ 50% 7 0 %
4 C 1091 Fig. 7 7 C Ⅲ3-1 Distribution of Ⅲ3-1 oil saturation in the second member of block-c Fig. 8 8 C IV5-2 Distribution of IV5-2 oil saturation in the second member of block-c
1092 35 Fig. 9 9 C II2-2 Distribution of II2-2 oil saturation in the second member of block-c 50% ~ 70% S7 45% ~ 38% ~ 50% 55% S7 9 S18 S19 S25 67% ~ 69% 4. 2 C 5 1 C C 10 70% 50% 38% S27 2 Ⅱ2-2
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