摘要
对龙门山北段构造带断裂发育情况、断裂对地表盖层的破坏程度进行了分析,结合已有的过井地震资料的构造解释及地层水化学特征等,综合分析了川西北中二叠统油气保存条件。结果表明:四川盆地西北部油气藏的保存条件的主要影响因素是龙门山构造带内断裂活动对盖层的破坏程度,由此产生了一系列圈闭条件、地层水化学条件的变化。其中,隐伏构造带具有优越的天然气成藏条件;龙门山前山带由于受多期构造运动影响,断裂发育,切穿层位多,油气储集空间遭到破坏,油气保存条件差;靠近盆内的山前带断裂隐伏于地下,构造作用强度低,地层封闭性好,油气保存条件好。
Based on the research on the development of faults in the Longmenshan structural belt,the degree of damage to the surface caprock by the faults,and the structural interpretation of the existing seismic data,the influence of complex structures in northwest Sichuan on the oil and gas preservation conditions of the Permian is discussed.The research results show that the main influencing factor for the preservation conditions of oil and gas reservoirs in the northwestern Sichuan Basin is the extent of damage to the caprock by fault activities in the Longmenshan structural belt,resulting in a series of changes in trap conditions and formation water chemical conditions.Among which,The hidden structural belt has excellent natural gas accumulation conditions;the piedmont zone of Longmen Mountain is affected by multi-stage tectonic movement,with developed faults,many cut-through horizons,destruction of oil and gas storage space,and poor oil and gas preservation conditions;and mountains close to the basin Front zone faults are hidden underground,with low tectonic strength,good stratum sealing,and good oil and gas preservation conditions.
作者
曾雨露
范存辉
夏茂龙
郭鸿喜
刘竞
梁静
欧祎泓
Zeng Yulu;Fan Cunhui;Xia Maolong;Guo Hongxi;Liu Jing;Liang Jing;Bai Xiaoliang(School of Science and Technology,Southwest Petroleum University,Chengdu 610500,China;PetroChina Southwest Oil and Gas Field Branch Exploration and Development Research Institute,Chengdu 610051,China)
出处
《云南化工》
CAS
2022年第6期83-88,共6页
Yunnan Chemical Technology
基金
国家科技重大专项《四川盆地及邻区下古生界—前寒武系成藏条件研究与区带目标评价》(2016ZX05004-005)。
关键词
四川盆地
龙门山构造带
隐伏断裂
油气保存条件
Sichuan Basin
Longmenshan structural belt
hidden faults
oil and gas preservation conditions
