摘要
川西坳陷南北向构造带经历了多次构造运动,断裂极其发育,其圈闭的形成与断裂作用密切相关,对断层演化特征及其封闭性综合研究已成为该区油气勘探的重要因素。该区主要发育SN向和NNE向两组断裂,NNE向断裂切割SN向断裂,表明其形成晚于SN向断裂。通过应用断面正应力、地层砂泥比及Allen剖面分析等方法,对区内主干断裂进行封闭性分析,建立了该区断裂封闭性标准。研究表明,南北向构造带断裂整体封闭性较好,在平面上北部知新场、石泉场构造好于南部龙宝梁构造,在纵向上须二、须三段封闭性好于须四、须五段,与该区钻井揭示吻合。
Faulting was well developed in the longitudinal tectonic zone, west Sichuan depression due to multistage tectonic movement. The traps are in close relation with the faulting. So, comprehensive research into fault evolutionary and fault sealing property are the important factors in oil and gas exploration in this area. The early longitudinal and late NNE-trending faults were developed in this area. The study of fault sealing property indicates that fault sealing property of the Xujiahe Formation in the longitudinal tectonic zone is better. The fault sealing property in Zhixinchang and Shiquanchang in north is better than that in Longbaoliang in south. The fault sealing property of the 2 nd and 3 rd Members of the Xujiahe Formation is better than that of the 4 th and 5 th Members of the Xujiahe Formation.
作者
苏华成
贾霍甫
曹波
欧奎
李刚
SU Hua-cheng;JIA Huo-fu;CAO Bo;OU Kui;LI Gang(Research Institute of Exploration and Exploitation of Southwest Branch Company,SINOPEC Group,Chengdu 610081)
出处
《四川地质学报》
2018年第2期208-211,共4页
Acta Geologica Sichuan
关键词
构造带
断层封闭性
Allen剖面
川西坳陷
tectonic zone
fault sealing property
Allen section
west Sichuan depression
