摘要
探讨四川盆地西北部九龙山中二叠统裂缝发育特征及形成机制。通过对钻井岩心的观察和描述,结合成像测井和测试资料的分析表明,研究区中二叠统裂缝主要以低角度(15°~45°)、小宽度为主,NE向裂缝最为发育。裂缝受控于4期构造运动,分别为印支末期、燕山中-晚期、喜马拉雅早期以及喜马拉雅中-晚期。其中燕山中-晚期、喜马拉雅早期为主要活动时期,在各个活动时期中的龙门山断裂带和米仓山断裂带向盆内的推覆运动是裂缝形成的关键因素。九龙山地区中二叠统储层裂缝形成演化是受到了不同时期的地应力影响的结果。
The development characteristics and formation mechanism of fractures in the Middle Permian in Jiulongshan area of Sichuan Basin are studied by observation and descriptions of cores,in combination with analysis of imaging logging and testing data. It shows that the fractures occurred in Middle Permian in the study area are mainly characteristic of northeast trending,low dipping angle (15°~45°) and small width. These fractures were controlled by four stages of tectonic movements,including the late Indo-China period,middle to late Yanshan period,early Himalayan period and middle to late Himalayan period. The middle to late Yanshan period and the early Himalayan period are the most important active periods for the formation of fractures. The over-thrusting movements of Longmenshan fault belts and Micangshan fault belts towards the Sichuan basin in each active period are responsible for the formation of fractures in this area,and the formation and evolution of fractures in Permian reservoirs in Jiulongshan area is resulted from the action of crustal stress in different periods.
作者
张本健
王兴志
王宇峰
胡欣
裴森奇
范存辉
ZHANG Benjian;WANG Xingzhi;WANG Yufeng;HU Xin;PEI Senqi;FAN Cunhui(School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,China;Petrochina Southwest Oil & Gas Field Company & Northwest Sichuan Gas Mine,Jiangyou 621700,China)
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2019年第4期497-506,共10页
Journal of Chengdu University of Technology: Science & Technology Edition
基金
中国石油西南油气田公司科技项目(20180301-07-04)
关键词
四川盆地
九龙山
中二叠统
裂缝
形成机制
Sichuan Basin
Jiulongshan
Middle Permian
fracture
formation mechanism
