塔里木盆地英吉苏凹陷天然气成藏主控因素分析

THE STUDY OF MAIN CONTROL FACTORS OF GAS ACCUMULATION IN THE YINGJISU SAG OF TARIM BASIN

时保宏 张艳 赵靖舟 王清华

Shi Baohong Zhang Yan Zhao Jingzhou Wang Qinghua

西安石油大学, 油气资源学院, 西安, 710065 2. 中国石油, 长庆油田分公司, 勘探开发研究院, 西安, 710021 3. 中国石油, 塔里木油田分公司, 勘探开发研究院, 新疆, 库尔勒, 841000

Xi'an Shiyou University, Xi'an, Shaanxi 710065, China 2. Institute of Exploration and Development, Changqing Oil and Gas Branch Company, CNPC, Xi'an, Shaanxi 710021, China 3. Institute of Exploration and Development, Tarim Oil and Gas Branch Company, CNPC, Korla, Xinjiang 841000, China

通过对塔里木盆地东部英吉苏凹陷的构造背景、油源条件、储盖层条件、聚集和保存条件的分析,探讨了英吉苏凹陷天然气成藏的地质条件和成藏主控因素.认为英吉苏凹陷具备形成油气藏的地质条件,同时烃源岩特定的演化特征决定了该地区中生界构造主要以富气为主.英吉苏地区独特的构造环境和成藏特征,使得中生界构造的主要油气源为下伏的古生界古油(气)藏,所以活动时间长、沟通古油(气)藏与中生界构造的断裂成为中生界构造能否达到工业聚集的关键控制因素.另外,有效盖层和古隆起背景也是该区能否形成天然气藏的主要控制因素.

Through the studying of the structure background,source rocks,reservoirs and seals and preservation in the Yingjisu Sag in the east of Tarim Basin,the geologic conditions and main control factors of the accumulation are discussed.There are favorable conditions for accumulation in the Yingjisu Sag.Because of the evolvement characteristics of source rocks,the traps in Mesozoic groups accumulate mainly gas.It is the particular history of tectonic evolution and characteristics of accumulation that determine faults from Palaeozoic to Mesozoic are the crucial control of Mesozoic groups accumulation.Meanwhile,effective caprocks and paleouplifts are also the main controls.

国家“十五”重点攻关项目(2001BA605A-02-01-06)

https://doi.org/10.11781/sysydz200705482