四川盆地南缘昭通示范区罗布向斜志留系龙马溪组页岩储层裂缝建模

doi:10.12108/yxyqc.20240313

岩性油气藏 ›› 2024, Vol. 36 ›› Issue (3): 137–145.doi: 10.12108/yxyqc.20240313

四川盆地南缘昭通示范区罗布向斜志留系龙马溪组页岩储层裂缝建模

计玉冰¹, 郭冰如², 梅珏¹, 尹志军², 邹辰¹

1. 中国石油浙江油田公司勘探开发一体化中心, 杭州 310023;
2. 中国石油大学(北京)地球科学学院, 北京 102249

收稿日期:2022-11-17 修回日期:2023-01-28 出版日期:2024-05-01 发布日期:2024-04-30
第一作者:计玉冰（1989—），男，硕士，高级工程师，主要从事油气地质综合研究方面的工作。地址:（310023）浙江省杭州市西湖区留下街道荆山岭浙江油田公司。Email:jiyb85@petrochina.com.cn。
通信作者: 郭冰如（1998—），男，中国石油大学（北京）在读硕士研究生，研究方向为油气田开发地质。Email:bingru_guo@163.com。
基金资助:
国家科技重大专项“昭通页岩气勘探开发示范工程”（编号：2017ZX05063）与中国石油天然气集团有限公司重大现场试验项目“深层页岩气有效开采关键技术攻关与试验”（编号：2019F-13）联合资助。

Fracture modeling of shale reservoirs of Silurian Longmaxi Formation in Luobu syncline in Zhaotong National Shale Gas Demonstration Area， southern margin of Sichuan Basin

JI Yubing¹, GUO Bingru², MEI Jue¹, YIN Zhijun², ZOU Chen¹

1. Integration Center of Exploration & Development, PetroChina Zhejiang Oilfield Company, Hangzhou 310023, China;
2. College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China

Received:2022-11-17 Revised:2023-01-28 Online:2024-05-01 Published:2024-04-30

摘要/Abstract

摘要： 基于岩心分析、成像测井分析和三维地震资料，对四川盆地南缘昭通示范区罗布向斜龙一 1亚段和五峰组的多尺度离散裂缝网络建模方法进行了研究。研究结果表明：①将蚂蚁体属性中的强响应部分确定性提取成面，可得到大尺度离散裂缝网络模型；用蚂蚁体沿层切片显示的带走向趋势的裂缝参与小尺度离散裂缝网络建模，降低了小尺度裂缝走向模拟的不确定性。②罗布向斜龙一₁亚段和五峰组裂缝以高角度剪切缝为主，多被方解石充填，裂缝走向为北东—南西向，成像测井解释的裂缝走向与附近地震解释的断层走向一致。③大尺度离散裂缝网络模型与钻井的断层位置相符，小尺度裂缝发育部位与钻井液漏失部位吻合，多尺度离散裂缝网络模型可较好地表征罗布向斜龙一₁亚段和五峰组的裂缝发育特征。④罗布向斜 Y12H 井应用多尺度离散裂缝网络模型优化压裂方案，压裂缝网复杂度高，试气产量较邻井提高了近 41%，优化小尺度裂缝走向后的多尺度离散裂缝网络模型实际应用效果较好。

关键词: 多尺度裂缝建模, 离散裂缝网络模型, 蚂蚁体, 页岩储层, 龙马溪组, 志留系, 罗布向斜, 昭通示范区, 四川盆地

Abstract: Based on core analysis, imaging logging analysis and 3D seismic data, a multi-scale discrete fracture network modeling method was studied for Long-1 submember of Longmaxi Formation and Wufeng Formation in Luobu syncline in Zhaotong National Shale Gas Demonstration Area, southern margin of Sichuan Basin. The results show that:（1）Extracting the strong response part of ant tracking attributes as a surface can obtain a large-scale discrete fracture network model. Small scale fracture modeling can be established using the random discrete fracture network modeling method, which uses the trend of the fracture band shown by ant tracking properties along the layer slice, which reduces the uncertainty of small-scale fracture simulation.（2）The fractures of Long-1 submember of Longmaxi Formation and Wufeng Formation in Luobu syncline are mainly high angle shear fractures, mostly filled with calcite. The main direction of the fractures is northeast southwest, and the fracture direction explained by imaging logging is consistent with the fault direction explained by nearby seismic interpretation（. 3）The large-scale discrete fracture network model is consistent with the fault location of the drilling, and the development of small-scale fractures is consistent with the leakage of drilling fluid, indicating that the multi-scale discrete fracture network model can better represent the fracture development characteristics of Long-1 submember of Longmaxi Formation and Wufeng Formation in Luobu syncline.（4）The multi-scale discrete fracture network model was applied to optimize the hydraulic fracturing scheme for well Y12H in Luobu syncline, resulting in a high complexity of hydraulic fracturing network and nearly 41% increase in gas production compared to adjacent wells. The multi-scale discrete fracture network model after optimizing the small-scale fracture orientation has a good practical application effect.

Key words: multi-scale fracture modeling, discrete fracture network model, ant-tracking attribute volume, shale reservoir, Longmaxi Formation, Silurian, Luobu Syncline, Zhaotong National Shale Gas Demonstration Area, Sichuan Basin

中图分类号:

TE122.2

计玉冰, 郭冰如, 梅珏, 尹志军, 邹辰. 四川盆地南缘昭通示范区罗布向斜志留系龙马溪组页岩储层裂缝建模[J]. 岩性油气藏, 2024, 36(3): 137–145.

JI Yubing, GUO Bingru, MEI Jue, YIN Zhijun, ZOU Chen. Fracture modeling of shale reservoirs of Silurian Longmaxi Formation in Luobu syncline in Zhaotong National Shale Gas Demonstration Area， southern margin of Sichuan Basin[J]. Lithologic Reservoirs, 2024, 36(3): 137–145.

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四川盆地南缘昭通示范区罗布向斜志留系龙马溪组页岩储层裂缝建模

Fracture modeling of shale reservoirs of Silurian Longmaxi Formation in Luobu syncline in Zhaotong National Shale Gas Demonstration Area， southern margin of Sichuan Basin

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