Oil & Gas Geology ›› 2022, Vol. 43 ›› Issue (3): 633-647.doi: 10.11743/ogg20220312
• Petroleum Geology • Previous Articles Next Articles
Xun Ge1,2(), Tonglou Guo3, Yongsheng Ma4, Guoli Wang3, Maowen Li2, Xiaoqun Yu5, Peirong Zhao4, Zhentao Wen5, Peng Wang5
Received:
2021-07-26
Revised:
2022-03-10
Online:
2022-06-01
Published:
2022-05-06
CLC Number:
Xun Ge, Tonglou Guo, Yongsheng Ma, Guoli Wang, Maowen Li, Xiaoqun Yu, Peirong Zhao, Zhentao Wen, Peng Wang. Prediction of shale reservoir sweet spots of the Upper Ordovician Wufeng-Longmaxi Formations in Lintanchang area, southeastern margin of Sichuan Basin[J]. Oil & Gas Geology, 2022, 43(3): 633-647.
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Table 1
Geological and physical characteristics of shale reservoirs in the Long 1 Member in Well LY1, Lintanchang area, southeastern margin of Sichuan Basin"
岩性 | 黑灰色、灰色和黑色页岩 | ||||||
---|---|---|---|---|---|---|---|
地层 | 龙一段 | ||||||
④ | ⑤ | ⑥ | ⑦ | ⑧ | ⑨ | ||
TOC/% | 3.0 | 1.1 | 0.8 | 0.7 | 0.8 | — | |
POR/% | 4.7 | 1.8 | 1.9 | 1.9 | 1.5 | — | |
GAS/(m3·t-1) | 3.17 | 3.58 | 3.37 | 3.02 | 2.72 | — | |
渗透率/(10-3 μm2) | 0.005 2~0.223 0 | 0.001 4~0.103 6 | 0.002 6~0.102 2 | 0.001 0~0.012 7 | — | — | |
Ro/% | 2.26~2.48 | ||||||
干酪根 | 腐泥组含量/% | 94~96 | |||||
镜质组含量/% | 5 | ||||||
壳质组含量/% | — | ||||||
类型 | Ⅰ | ||||||
矿物平均含量/% | 硅质 | 40.28 | |||||
钙质 | 14.37 | ||||||
粘土 | 42.83 |
Table 2
Statistical table of parameter errors of sweet spots in sub?layers ①-⑤ in the Longmaxi Formation in Lintanhcang area, southeastern margin of Sichuan Basin"
井名 | POR/% | TOC/% | GAS/(m3·t-1) | BI | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
测井 | 反演 | 误差 | 测井 | 反演 | 误差 | 测井 | 反演 | 误差 | 测井 | 反演 | 误差 | |
林页1井 | 4.21 | 4.10 | 0.11 | 2.96 | 2.96 | 0 | 4.61 | 3.68 | 0.93 | 62.93 | 62.55 | 0.38 |
林1井 | 3.45 | 3.44 | 0.01 | 2.26 | 2.28 | -0.02 | 4.58 | 4.99 | -0.41 | 53.87 | 53.53 | 0.34 |
林页3井 | 4.16 | 4.26 | -0.10 | 2.84 | 2.80 | 0.04 | 3.41 | 3.36 | 0.05 | 57.67 | 58.35 | -0.68 |
Table 3
Comparison of parameters between zones of TypeⅠand TypeⅡin Lintanchang area, southeastern margin of Sichuan Basin"
综合评价 | 地质参数 | 工程参数 | 保存条件 | ||||||
---|---|---|---|---|---|---|---|---|---|
TOC/% | POR/% | GAS/(m3·t-1) | BI | DHSR | 地层倾角/(°) | 断裂影响 | 地层压力系数 | ||
相干属性值 | 曲率属性值 | ||||||||
Ⅰ类区 | >3.0 | >4.0 | >5.0 | >55.0 | >0.1 | <10 | >0.9 | <0.002 | <0.8 |
Ⅱ类区 | 2.0~3.0 | 3.0~4.0 | 4.0~5.0 | 50.0~55.0 | 0.1~0.2 | 10~20 | 0.7~0.9 | 0.002~0.007 | 0.8~1.2 |
远景区 | <2.0 | <3.0 | <4.0 | <50.0 | >0.2 | >20 | <0.7 | >0.007 | >1.2 |
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