川西坳陷中段有效圈闭探讨

On the effective traps in the middle part of western Sichuan depression

西南石油局石油天然气勘探开发研究院, 成都 610081

Institute of Hydrocarbon Exploration and Development, Southwest China Petroleum Bureau, Chengdu 610081

所谓有效圈闭就是曾经聚集并保存具有工业价值油气的岩体。本交通过对燕山中—晚期古构造（古隆起）和喜山期断层、破碎带的分析,以及对新场、合兴场、孝泉等几个气藏有效圈闭的剖析,论述了本区形成有效圈闭的主要控制因素,为今后川西坳陷中段有效圈闭的勘探提供参考。

The so-called effective trap is namely rock mass in which commercial oil and gas have once accumulated and preserved. In the paper, I analyze the paleostructures in medium and late Yeashan age as well as laults and shatter belts in Himalayan age. Then several gas pool effective traps in Xinchang, Hexinchang, Xiaoquan and other areas are dissected. Finally the principal control factors of forming effective traps in the work area are expounded, which provides references for the exploration of effective traps in the middle part of western Sichuan depression from now on.