川西坳陷回龙地区沙溪庙组成藏条件及主控因素分析

Accumulation conditions and controlling factors of Shaximiao Formation, Huilong area, Western Sichuan Depression

杨帆 孙准 赵爽

Yang Fan Sun Zhun Zhao Shuang

成都理工大学, 地球物理学院, 成都, 610059 2. 成都理工大学, "油气藏地质及开发工程"国家重点实验室, 成都, 610059 3. 中国石油化工股份有限公司, 西南油气分公司, 勘探开发研究院德阳分院, 四川, 德阳, 618000

College of Geophysics, Chengdu University of Technology, Chengdu 610059, China 2. Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China 3. Deyang Branch, Exploration and Development Institute, SINOPEC Southwest Oil & Gas Company, Deyang, Sichuan 618000, China

从油气的烃源条件、储集条件、保存条件及成藏组合方面入手,结合构造史以及岩心、地震及钻井等资料,对川西回龙地区沙溪庙组气藏的成藏主控因素进行分析。结果证实,该地区沙溪庙组气藏具有良好的生、储、盖组合条件,气藏成藏主控因素主要为低阻抗的孔隙性砂体、边界气源断层以及有效的圈闭。典型砂体成藏剖析揭示,区内存在3种典型的成藏组合模式,但受圈闭限制,气藏成藏规模有限。

Based on the studies of source rock,storage,preservation and accumulation conditions for hydrocarbon,combined with tectonic history,core,seismic and drilling data,the main controlling factors for gas accumulation in Shaximiao Formation in Huilong area of the Western Sichuan Depression were analyzed.It was concluded that the study area was favorable for hydrocarbon generation,storage and capping.The main controlling factors included porous sand body with low impedance,boundary fault and effective trap.Typical sand body accumulation indicated that there were 3 kinds of typical accumulation assemblages; however,restricted by traps,gas accumulation size was limited.

https://doi.org/10.11781/sysydz201106569