Oil & Gas Geology ›› 2023, Vol. 44 ›› Issue (4): 993-1008.doi: 10.11743/ogg20230415
• Petroleum Geology • Previous Articles Next Articles
Sheng LIU1,2(), Cunhui FAN1,2(), Benjian ZHANG3, Ya ZHANG3, Bing LUO3, Xiaoliang BAI4
Received:
2023-03-08
Revised:
2023-05-26
Online:
2023-08-01
Published:
2023-08-09
Contact:
Cunhui FAN
E-mail:lsengswpu@126.com;fanchswpi@163.com
CLC Number:
Sheng LIU, Cunhui FAN, Benjian ZHANG, Ya ZHANG, Bing LUO, Xiaoliang BAI. Distribution characteristics of Gufeng Member of the Middle Permian Maokou Formation, eastern Sichuan Basin and its petrogeological significance[J]. Oil & Gas Geology, 2023, 44(4): 993-1008.
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Table1
Geochemical characteristics of Maokou-Wujiaping formations on Honghuayuan outcrop, and in well DT002-4 and well C67 in eastern Sichuan Basin"
取样井/ 剖面 | 样品 编号 | 岩性 | 取样 层位 | 矿物含量/% | 微量元素含量/10-6 | δCe | Ceanom | δEu | Y/Ho | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Al2O3 | Fe2O3 | SiO2 | CaO | K2O | Rb | Sr | Ni | Cr | V | U | Mo | La | Ce | Pr | Nd | Sm | Eu | Gd | Y | Ho | |||||||||
红 花 园 剖 面 | HHY1 | 泥质灰岩 | 茅 二 段 | 5.068 | 0.793 | 36.770 | 24.496 | 0.281 | 9.632 | 2 932.46 | 215.35 | 367.12 | 83.76 | 8.52 | 6.28 | 12.57 | 8.00 | 1.83 | 7.04 | 1.32 | 0.27 | 1.36 | 13.38 | 0.27 | 0.35 | -0.48 | 0.88 | 49.75 | |
HHY2 | 泥质灰岩 | 5.609 | 1.501 | 41.644 | 22.231 | 0.511 | 11.169 | 1 044.62 | 452.28 | 350.67 | 78.49 | 19.12 | 12.46 | 16.83 | 12.44 | 2.69 | 10.56 | 1.90 | 0.39 | 2.06 | 18.39 | 0.39 | 0.39 | -0.43 | 0.87 | 47.50 | |||
HHY3 | 含泥灰岩 | 4.748 | 0.312 | 31.060 | 24.500 | 0.091 | 5.218 | 2 470.89 | 11.77 | 42.98 | 78.46 | 4.02 | 11.99 | 3.28 | 4.91 | 0.63 | 2.21 | 0.41 | 0.09 | 0.42 | 3.93 | 0.10 | 0.74 | -0.13 | 0.94 | 37.52 | |||
HHY4 | 含泥灰岩 | 2.581 | 0.780 | 6.189 | 23.861 | 0.446 | 8.815 | 557.83 | 72.83 | 85.11 | 378.42 | 7.76 | 29.98 | 9.65 | 12.72 | 1.37 | 4.89 | 0.89 | 0.19 | 0.91 | 7.69 | 0.19 | 0.73 | -0.16 | 0.91 | 40.88 | |||
HHY5 | 硅质页岩 | 孤 峰 段 | 1.514 | 2.827 | 92.728 | 0.215 | 0.382 | 20.950 | 280.08 | 155.27 | 669.31 | 1 190.54 | 18.94 | 359.32 | 34.66 | 38.28 | 4.82 | 17.04 | 21.17 | 0.62 | 2.97 | 16.04 | 0.53 | 0.62 | -0.23 | 0.75 | 30.53 | ||
HHY6 | 硅质页岩 | 1.795 | 2.784 | 92.543 | 0.236 | 0.346 | 20.485 | 275.45 | 148.73 | 468.20 | 1 052.35 | 20.45 | 336.27 | 35.88 | 37.47 | 4.76 | 16.58 | 17.63 | 0.55 | 2.86 | 15.86 | 0.48 | 0.60 | -0.25 | 0.87 | 33.04 | |||
HHY7 | 硅质页岩 | 1.913 | 1.809 | 91.444 | 0.234 | 0.500 | 18.050 | 258.92 | 100.46 | 351.10 | 1 020.90 | 14.66 | 352.40 | 45.71 | 49.17 | 5.90 | 17.84 | 7.93 | 0.48 | 2.37 | 8.64 | 0.28 | 0.62 | -0.23 | 1.04 | 30.72 | |||
HHY8 | 硅质页岩 | 1.894 | 2.054 | 91.634 | 0.224 | 0.480 | 18.875 | 251.32 | 105.64 | 389.50 | 1 064.59 | 17.66 | 326.24 | 43.46 | 51.33 | 5.82 | 18.52 | 30.88 | 0.46 | 2.24 | 8.25 | 0.23 | 0.67 | -0.19 | 0.72 | 35.87 | |||
DT002- 4井 | DT1 | 硅质页岩 | 吴家 坪组 | 19.664 | 8.748 | 47.763 | 2.233 | 2.087 | 36.901 | 524.87 | 69.17 | 111.22 | 180.37 | 2.86 | 1.32 | 119.29 | 234.20 | 30.66 | 111.20 | 13.70 | 3.07 | 14.85 | 48.29 | 1.85 | 0.84 | -0.05 | 0.92 | 26.10 | |
DT2 | 硅质页岩 | 21.602 | 6.755 | 48.786 | 1.619 | 2.264 | 40.532 | 549.31 | 60.44 | 114.80 | 197.07 | 4.50 | 0.88 | 109.09 | 216.27 | 27.69 | 99.29 | 3.22 | 3.15 | 14.17 | 80.25 | 2.94 | 0.86 | -0.04 | 0.88 | 27.26 | |||
DT3 | 硅质页岩 | 14.579 | 9.867 | 53.374 | 2.322 | 1.417 | 27.932 | 308.24 | 101.85 | 120.67 | 243.70 | 2.23 | 0.93 | 55.57 | 94.93 | 12.75 | 44.72 | 3.13 | 1.76 | 6.99 | 39.42 | 1.41 | 0.78 | -0.09 | 0.81 | 27.87 | |||
DT4 | 硅质页岩 | 孤 峰 段 | 27.147 | 3.063 | 60.536 | 0.223 | 2.292 | 43.308 | 711.12 | 20.59 | 27.81 | 76.03 | 7.27 | 4.36 | 178.90 | 404.18 | 50.67 | 217.78 | 2.71 | 3.88 | 16.99 | 63.75 | 2.15 | 0.92 | -0.03 | 0.83 | 29.70 | ||
DT5 | 硅质页岩 | 44.386 | 1.221 | 42.200 | 0.171 | 2.218 | 44.447 | 488.89 | 49.22 | 72.82 | 282.05 | 6.30 | 11.09 | 83.50 | 135.16 | 19.02 | 71.89 | 2.83 | 2.60 | 11.21 | 67.67 | 2.16 | 0.74 | -0.12 | 0.80 | 31.28 | |||
DT6 | 硅质页岩 | 1.652 | 1.642 | 91.873 | 0.397 | 0.260 | 20.749 | 126.34 | 480.45 | 623.79 | 3 275.61 | 21.48 | 273.58 | 32.75 | 40.87 | 5.46 | 19.54 | 3.22 | 0.58 | 2.18 | 15.33 | 0.45 | 0.65 | -0.20 | 0.95 | 34.07 | |||
DT7 | 硅质页岩 | 1.694 | 1.705 | 91.958 | 0.416 | 0.220 | 20.666 | 117.13 | 498.99 | 688.69 | 3 385.55 | 25.89 | 281.13 | 30.50 | 41.21 | 5.52 | 19.80 | 3.14 | 0.64 | 2.27 | 16.13 | 0.41 | 0.68 | -0.17 | 1.04 | 39.77 | |||
C67井 | C1 | 晶粒云岩 | 茅 二 段 | — | — | — | — | — | 0.03 | 84.29 | 527.13 | 9.97 | 5.69 | 0.69 | 0.27 | 1.25 | 0.42 | 0.19 | 0.69 | 0.15 | 0.23 | 0.17 | 2.68 | 0.05 | 0.18 | -0.76 | 6.25 | 56.97 | |
C2 | 晶粒云岩 | — | — | — | — | — | 0.03 | 60.52 | 7 741.50 | 3.19 | 1.16 | 0.49 | 0.18 | 0.14 | 0.11 | 0.03 | 0.13 | 0.03 | 0.01 | 0.04 | 0.45 | 0.01 | 0.39 | -0.43 | 1.05 | 51.17 | |||
C3 | 晶粒云岩 | — | — | — | — | — | 0.07 | 155.47 | 93.76 | 10.12 | 4.41 | 0.49 | 0.14 | 1.70 | 0.80 | 0.29 | 1.05 | 0.22 | 0.26 | 0.22 | 3.07 | 0.06 | 0.25 | -0.62 | 5.15 | 55.38 | |||
C4 | 晶粒云岩 | — | — | — | — | — | 0.44 | 1 995.57 | 114.49 | 39.93 | 5.54 | 0.31 | 0.34 | 2.85 | 1.31 | 0.32 | 1.11 | 0.32 | 3.76 | 0.37 | 2.61 | 0.04 | 0.28 | -0.60 | 47.66 | 66.45 |
Table 2
Maturity and abundance of organic matter on Honghuayuan outcrop and in Well DT002-4 in eastern Sichuan Basin (see Fig. 8a for the sampling points)"
序号 | 取样点 | 层位 | 岩性 | TOC/% | Ro/% |
---|---|---|---|---|---|
1 | DT1 | 吴家坪组 | 硅质页岩 | 5.73 | 2.52 |
2 | DT2 | 吴家坪组 | 硅质页岩 | 5.86 | 2.64 |
3 | DT3 | 吴家坪组 | 硅质页岩 | 2.55 | 2.54 |
4 | DT4 | 孤峰段 | 硅质页岩 | 1.69 | 2.58 |
5 | DT5 | 孤峰段 | 硅质页岩 | 5.96 | 2.78 |
6 | DT6 | 孤峰段 | 硅质页岩 | 38.27 | 2.98 |
7 | DT7 | 孤峰段 | 硅质页岩 | 4.11 | 2.91 |
8 | HHY5 | 孤峰段 | 硅质页岩 | 7.05 | 2.53 |
9 | HHY7 | 孤峰段 | 硅质页岩 | 11.98 | 2.31 |
10 | HHY1 | 茅二A亚段 | 泥质灰岩 | 5.17 | 2.18 |
11 | HHY2 | 茅二A亚段 | 泥质灰岩 | 6.97 | 2.26 |
12 | HHY3 | 茅二A亚段 | 含泥灰岩 | 0.43 | 2.28 |
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