塔里木盆地西北缘柯坪冲断带寒武系盐下成藏条件-断块油气田.PDF

断 块 油 气 田 21 卷 3 期 断 块 油 气 田 2014 年5 月 FAULT鄄BLOCK OIL 驭GAS FIELD doi:10.6056/dkyqt201403003 塔里木盆地西北缘柯坪冲断带寒武系盐下成藏条件 黄苏卫1 2 渊1.中国石油大学渊北京冤地球科学学院袁北京 102249 曰2.中国石油大学渊北京冤油气资源与探测国家重点实验室袁北京 102249冤 基金项目 中国地质调查局油气资源战略调查项目 柯坪冲断带古生界油气成藏条件评价冶渊1211302108022轧1冤 摘 要 柯坪冲断带位于塔里木盆地西北缘袁是南天山南缘冲断系统的一部分遥 虽然其古生代沉积地层与盆地内部相似袁 具备成藏条件袁但是由于剧烈的构造运动袁普遍认为该地区早期油气藏可能已经被后期构造运动破坏袁因而石油地质研究 仅限于野外露头的观测袁成为塔里木盆地油气勘探的空白遥文中通过野外剖面观察尧取样实验以及地震剖面解释袁对柯坪冲 断带寒武系盐下地层油气成藏条件进行分析袁预测了可能的成藏模式袁提出勘探重点应该放在研究区中南部的柯坪区和西 克尔区冲断带下盘的隐伏构造上遥这些隐伏构造经历的破坏作用相对较弱袁形态完整袁再加上上覆膏盐层的封盖作用袁成为 油气成藏的 有利区带遥 关键词 成藏条件曰膏盐层曰油气勘探曰隐伏构造曰柯坪冲断带 中图分类号 TE122.3 文献标志码 A Hydrocarbon accumulation conditions beneath Cambrian salt layer in Kalpin thrust belt of Tarim Basin Huang Suwei1袁2 (1.College of Earth Science, China University of Petroleum, Beij ing 102249, China; 2.State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beij ing 102249, China) Abstract: The Kalpin thrust belt, located at the northwestern margin of Tarim Basin, is a part of the southern South Tianshan marginal thrust system. Although the palaeozoic sedimentary formations are similar to the ones of the inner part of the basin and have the potential of hydrocarbon accumulation, it is generally believed that early hydrocarbon reservoirs may have been destroyed by the later tectonic movements because of intense tectonic movement in this zone. Therefore, petroleum geology research is r