| 断裂对川西坳陷致密砂岩气藏天然气运聚的控制作用 |
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| 引用本文： | 陈冬霞,王雷,庞雄奇,郭迎春,罗潇,谢明贤,王从玮.断裂对川西坳陷致密砂岩气藏天然气运聚的控制作用[J].现代地质,2013,27(5):1137-1146. |
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| 作者姓名： | 陈冬霞 王雷 庞雄奇 郭迎春 罗潇 谢明贤 王从玮 |
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| 作者单位： | 中国石油大学(北京)油气资源与探测国家重点实验室，北京 102249 |
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| 基金项目： | 国家科技重大专项项目(2011ZX05006 - 006);国家自然科学基金项目(41072100) |
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| 摘 要： | 川西坳陷致密砂岩气藏的形成和分布受断裂控制作用明显。在对断裂的分布特征、断裂性质、断层几何特征、断裂形成时间等研究的基础上，结合研究区断裂与砂体的沟通关系、已发现气藏的开发情况和失利井的综合分析，揭示了断裂对陆相领域致密气藏天然气运聚的控制作用。研究结果表明，断裂影响和控制川西坳陷致密天然气藏有5种情况:断裂发育促使深层须家河组天然气富集成藏、断裂输导使深部须家河组天然气部分破坏、断裂输导深部须家河组天然气使中浅层侏罗系成藏、断裂破坏严重使中浅层侏罗系成藏效率低和断裂不发育的部位中浅层侏罗系含气性较差。单井与断裂距离的远近对单井产能具有一定的影响，且不同级别断裂影响规律存在较大差异:I级断裂(延伸长度L≥100 km)和II级断裂((10km2 000 m，单井产能低。
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| 关 键 词： | 川西坳陷 致密砂岩气藏 断裂 天然气运移 天然气成藏 |
| 收稿时间： | 2013-05-07 |
| 修稿时间： | 2013-07-16 |
The Controlling of Fault on the Tight Sandstone Gas Migration and Accumulation in West Sichuan Depression |
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| CHEN Dong-xia,WANG Lei,PANG Xiong-qi,GUO Ying-chun,LUO Xiao,XIE Ming-xian.The Controlling of Fault on the Tight Sandstone Gas Migration and Accumulation in West Sichuan Depression[J].Geoscience——Journal of Graduate School,China University of Geosciences,2013,27(5):1137-1146. |
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| Authors: | CHEN Dong-xia WANG Lei PANG Xiong-qi GUO Ying-chun LUO Xiao XIE Ming-xian |
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| Institution: | State Key Laboratory of Petroleum Resources and Prospecting ,China University of Petroleum，Beijing 102249 |
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| Abstract: | The controlling of fault on the tight sandstone gas migration and accumulation of the continental strata in West Sichuan depression is very apparent. On basis of the research of the fault distribution characters，fault property，geometric characteristics，formation period，combined with the analysis of the connection of faults and sandstone，statistic of the developing wells state，the controlling factors of faulting on gas migration and accumulation are studied in detail. The research shows that five models can be identified by the controlling of fault on the tight sandstone gas. The first model shows that the fault growth prompted the natural gas accumulation in the tight sandstone in the deep strata of the Upper Triassic Xujiahe Formation reservoir. The second model indicates the fault development destroyed the natural gas reservoir in the deep strata of the Upper Triassic Xujiahe Formation. The third model means that the faults transported the deep natural gas migrating and accumulating in the shallow Jurassic tight sandstone. The fourth model indicate the fault destroyed badly the natural gas reservoir in Jurassic tight sandstone. The last model shows the lack of fault growth is not good for the natural gas accumula tion in the shallow Jurassic reservoir.The distance between the well and fault is also an important factou effecting the well production capcity.Different scale faults may create different gas accumulation.Scale I fault (spreads higher than 100 km)and Scale II fault (spreads higher than 10 km and lowe than 100 km)show the same regularity of medium distance between well and fault is most favorable for the gas accumulation,too far or too close is not good for gas reservoir.Scale III fault has the apparent positive controls that on the well production capacity increase with the increase of distance of well and fault. |
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| Keywords: | West Sichuan depression tight sandstone reservoir fault natural has migration natural gas accumulation |
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