Oil & Gas Geology ›› 2024, Vol. 45 ›› Issue (2): 420-439.doi: 10.11743/ogg20240209
• Petroleum Geology • Previous Articles Next Articles
Xiao HE1(), Maja ZHENG2, Yong LIU1, Qun ZHAO3, Xuewen Shi4, Zhenxue Jiang5(), Wei WU4, Ya WU2, Shitan NING5, Xianglu TANG5, Dadong LIU5
Received:
2023-10-28
Revised:
2024-03-18
Online:
2024-04-30
Published:
2024-04-30
Contact:
Zhenxue Jiang
E-mail:hexiao@petrochina.com.cn;jiangzx@cup.edu.cn
CLC Number:
Xiao HE, Maja ZHENG, Yong LIU, Qun ZHAO, Xuewen Shi, Zhenxue Jiang, Wei WU, Ya WU, Shitan NING, Xianglu TANG, Dadong LIU. Characteristics and differential origin of Qiongzhusi Formation shale reservoirs under the “aulacogen-uplift” tectonic setting, Sichuan Basin[J]. Oil & Gas Geology, 2024, 45(2): 420-439.
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Table1
Statistics of the stratigraphic division and thickness of the Qiongzhusi Formation in the Sichuan Basin"
井号 | 地层 | 深度/m | 层厚/m | |
---|---|---|---|---|
Z201井 | 筇二段 | 4 292.0 ~ 4 487.1 | 195.1 | |
筇一段 | 筇一1亚段 | 4 487.1 ~ 4 621.1 | 134.0 | |
筇一2亚段 | 4 462.1 ~ 4 868.3 | 247.7 | ||
WY1井 | 筇二段 | 4 167.5 ~ 4 243.2 | 75.7 | |
筇一段 | 筇一1亚段 | 4 243.2 ~ 4 364.7 | 121.5 | |
筇一2亚段 | 4 364.7 ~ 4 477.5 | 112.8 | ||
W207井 | 筇二段 | 2 987.5 ~ 3 049.1 | 61.6 | |
筇一段 | 筇一1亚段 | 3 049.1 ~ 3 144.7 | 95.6 | |
筇一2亚段 | 3 144.7 ~ 3 247.5 | 102.8 |
Table 2
Statistics of Ro (derived using Raman spectroscopy) and kerogen carbon isotope values of the Qiongzhusi Formation shales in the Sichuan Basin"
样品位置 | 井名 | 层位 | 埋深/m | Ro(拉曼)/% | δ13C(干酪根)/‰ | ||
---|---|---|---|---|---|---|---|
范 围 | 平均值 | 范围 | 平均值 | ||||
槽内 | Z201 | 筇竹寺组 | 4 893.29 | 3.29 ~ 3.44 | 3.36 | -29.93 ~ -28.61 | -29.41 |
GS17 | 筇竹寺组 | 4 976.86 | 3.54 ~ 3.60 | 3.57 | -31.05 ~ -28.23 | -30.04 | |
N206 | 筇竹寺组 | 1 863.57 | 3.71 ~ 3.75 | 3.74 | -31.42 ~ -29.86 | -31.14 | |
N208 | 筇竹寺组 | 3 237.97 | 3.72 ~ 3.81 | 3.78 | -30.12 ~ -27.59 | -29.55 | |
槽外 | W201 | 筇竹寺组 | 2 822.42 | 3.02 ~ 3.33 | 3.22 | -31.86 ~ -27.74 | -30.23 |
JS1 | 筇竹寺组 | 3 280.52 | 3.41 ~ 3.50 | 3.46 | -31.00 ~ -29.30 | -30.58 | |
PT1 | 筇竹寺组 | 3 280.52 | 3.38 ~ 3.52 | 3.44 | -34.08 ~ -30.64 | -32.33 |
Table 5
Parameters of the Qiongzhusi Formation shale reservoirs (TOC ≥ 2 %) in wells Z201 and WY1 in the Sichuan Basin"
井名 | 地层 | 小层编号 | 起始 深度/m | 终止 深度/m | 地层 厚度/m | 储层 厚度/m | 有效孔隙度/% | 含水 饱和度/% | 黏土 矿物 含量/% | 碳酸盐矿物 含量/% | 石英 含量/% | 脆性 指数/% | TOC/% | 吸附气含量/(m3/t) | 游离气含量/(m3/t) | 总含 气量/(m3/t) | 储层类型 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Z201 | 筇二段 | 7 | 4 460.9 | 4 487 | 26.1 | 2.4 | 4.8 | 32.2 | 24.3 | 0 | 63.0 | 69.0 | 2.1 | 1.5 | 5.7 | 7.2 | Ⅱ类 |
筇一2亚段 | 5 | 4 563.2 | 4 620.9 | 57.7 | 40.6 | 4.8 | 25.4 | 21.3 | 1.4 | 64.0 | 71.2 | 2.8 | 1.7 | 6.3 | 8.0 | Ⅰ类 | |
筇一1亚段 | 3 | 4 740.4 | 4 809.3 | 68.9 | 15.0 | 3.9 | 25.3 | 13.6 | 12.5 | 63.1 | 80.4 | 2.7 | 1.7 | 5.0 | 6.6 | Ⅰ类 | |
1 | 4 846.9 | 4 868.8 | 21.9 | 4.1 | 3.9 | 24.7 | 9.6 | 12.4 | 67.0 | 83.8 | 3.2 | 1.9 | 5.0 | 6.8 | Ⅰ类 | ||
WY1 | 筇二段 | 7 | 4 219.1 | 4 243.2 | 24.1 | 0.6 | 4.0 | 37.8 | 34.9 | 6.2 | 45.4 | 57.0 | 2.1 | 1.4 | 3.7 | 5.2 | II类 |
筇一2亚段 | 5 | 4 314.9 | 4 364.7 | 49.8 | 18.0 | 4.4 | 22.6 | 34.2 | 3.2 | 48.1 | 63.1 | 2.5 | 1.6 | 6.4 | 8.0 | Ⅰ+Ⅱ类 | |
筇一1亚段 | 3 | 4 403.9 | 4 448.7 | 44.8 | 23.0 | 3.7 | 19.3 | 35.8 | 2.2 | 47.4 | 66.2 | 2.8 | 1.7 | 5.8 | 7.5 | Ⅰ+Ⅱ类 | |
1 | 4 463.5 | 4 477.5 | 14.0 | 0 | — | — | — | — | — | — | — | — | — | — | Ⅲ类 |
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