复杂构造区页岩气藏地质特征与效益开发建议——以四川盆地及其周缘五峰组—龙马溪组为例

doi:10.7623/syxb202012004

石油学报 ›› 2020, Vol. 41 ›› Issue (12): 1490-1500.DOI: 10.7623/syxb202012004

复杂构造区页岩气藏地质特征与效益开发建议——以四川盆地及其周缘五峰组—龙马溪组为例

郭彤楼, 何希鹏, 曾萍, 高玉巧, 张培先, 何贵松

中国石油化工股份有限公司华东油气分公司江苏南京 210011

收稿日期:2020-02-20 修回日期:2020-06-19 出版日期:2020-12-25 发布日期:2021-01-06
通讯作者: 郭彤楼,男,1965年10月生,1987年获成都地质学院学士学位,2004年获同济大学博士学位,现为中国石油化工股份有限公司华东油气分公司教授级高级工程师,长期从事油气地质研究和勘探工作。Email:tlguo@163.com
基金资助:
国家科技重大专项（2011ZX05005-003和2016ZX05061）资助。

Geological characteristics and beneficial development scheme of shale gas reservoirs in complex tectonic regions:a case study of Wufeng-Longmaxi formations in Sichuan Basin and its periphery

Guo Tonglou, He Xipeng, Zeng Ping, Gao Yuqiao, Zhang Peixian, He Guisong

Sinopec East China Oil and Gas Company, Jiangsu Nanjing 210011, China

Received:2020-02-20 Revised:2020-06-19 Online:2020-12-25 Published:2021-01-06

摘要/Abstract

摘要：

以四川盆地及其周缘五峰组—龙马溪组页岩气藏为例，总结了复杂构造区高压、超压页岩气田的地质特征，对比分析了常压页岩气藏与高压、超压页岩气藏的异同点。根据构造改造和气藏的分布特点，提出了常压页岩气藏的分类方案，将中国南方常压页岩气藏分为盆内型、盆（内）缘过渡型和盆外残留型3种类型。研究认为，盆外残留型页岩气藏具有地层连续分布面积小、裂缝发育、地层压力系数偏低、游离气占比较低、地应力较小和两向水平应力差异较大等特点。对盆地外复杂构造区的常压页岩气藏，提出TOC大于3%、孔隙度大于3%和含气量大于3 m³/t可作为效益开发的选区依据。

关键词: 复杂构造区, 常压页岩气藏, 五峰组—龙马溪组, 地质特征, 效益开发

Abstract:

Taking the Wufeng Formation-Longmaxi Formation shale gas reservoirs in Sichuan Basin and its periphery as examples, this paper summarizes the geological characteristics of high-pressure and over-pressure shale gas fields in complex tectonic regions, compares and analyzes similarities and differences between normal pressure and high-/over-pressure shale gas reservoirs. According to the distribution characteristics of tectonic reworking and gas reservoirs, this paper proposes a classification scheme for normal pressure shale gas reservoirs, and divides the normal pressure shale gas reservoirs in southern China into three types, i.e., intra-basin type, basin margin transition type and extrabasinal residual type. The research shows that the shale gas reservoirs of the extrabasinal residual type has the characteristics of small continuous distribution area, well-developed fractures, low formation pressure coefficient, low free gas ratio, small crustal stress and large difference in bidirectional horizontal stress. For the normal pressure shale gas reservoirs in complex tectonic regions outside the basin, this paper proposes that TOC greater than 3%, porosity above 3%, and gas content more than 3 m³/t can be used as the basis for selecting beneficial development zones.

Key words: complex tectonic region, normal pressure shale gas reservoir, Wufeng Formation-Longmaxi Formation, geological characteristics, beneficial development

中图分类号:

TE122.3

郭彤楼, 何希鹏, 曾萍, 高玉巧, 张培先, 何贵松. 复杂构造区页岩气藏地质特征与效益开发建议——以四川盆地及其周缘五峰组—龙马溪组为例[J]. 石油学报, 2020, 41(12): 1490-1500.

Guo Tonglou, He Xipeng, Zeng Ping, Gao Yuqiao, Zhang Peixian, He Guisong. Geological characteristics and beneficial development scheme of shale gas reservoirs in complex tectonic regions:a case study of Wufeng-Longmaxi formations in Sichuan Basin and its periphery[J]. Acta Petrolei Sinica, 2020, 41(12): 1490-1500.

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复杂构造区页岩气藏地质特征与效益开发建议——以四川盆地及其周缘五峰组—龙马溪组为例

Geological characteristics and beneficial development scheme of shale gas reservoirs in complex tectonic regions:a case study of Wufeng-Longmaxi formations in Sichuan Basin and its periphery

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