川南长宁地区构造变形特征及其与页岩气保存条件关系  

Characteristics of tectonic deformation in Changning area of southern Sichuan and its relationship with preservation conditions of Shale gas

作　　者：文冉 衡德 陈伟[2] 谢凌峰 廖梓翔 Wen Ran;Heng De;Chen Wei;Xie Lingfeng;Liao Zixiang(Sichuan Changning Natural Gas Development Co.,Ltd,Chengdu 610000;School of Earth Science and Technology,Southwest Petroleum University,Chengdu 610599)

机构地区：[1]四川长宁天然气开发有限责任公司,四川成都610000 [2]西南石油大学地球科学与技术学院,四川成都610000

出　　处：《石化技术》2023年第8期83-85,共3页Petrochemical Industry Technology

摘　　要：针对复杂的构造变形样式在长宁页岩气保存中起到的作用,本研究基于长宁地区的地震、露头以及钻井资料,对区域内发育的典型构造进行了几何分析,分析了构造变形的运动学机制,并结合现有的生产数据,分析了构造变形对页岩气保存的影响。研究结果表明:长宁地区受北东向多期次叠加应力场及喜山晚期北西向应力场控制,其主导区域构造特征及变形样式并制约五峰组-龙马溪组页岩气的构造保存条件;长宁地区五峰组-龙马溪组构造变形样式主控页岩气保存条件、断裂体系演化及断层规模制约顶底板保存条件,基底卷入变形造成抬升逸散,三角剪切活动控制剪切破坏、断层传播样式制约页岩。In view of the role of complex structural deformation patterns in the preservation of Changning shale gas,this study conducted a geometric analysis of typical structures developed in the region based on seismic,outcrop,and drilling data from the Changning area,analyzed the kinematic mechanism of structural deformation,and combined with existing production data,analyzed the impact of structural deformation on shale gas preservation.The research results show that the Changning area is controlled by the NE multi-stage superimposed stress field and the NW late Himalayan stress field,which dominate the regional structural characteristics and deformation patterns and restrict the structural preservation conditions of the Wufeng Formation Longmaxi Formation shale gas;The structural deformation patterns of the Wufeng Formation Longmaxi Formation in Changning area mainly control the preservation conditions of shale gas,the evolution of fault systems,and the scale of faults restrict the preservation conditions of the roof and floor.The basement is involved in deformation,resulting in uplift and dissipation.Triangular shear activities control shear failure,and fault propagation patterns restrict shale.

关 键 词：构造几何学 保存条件 运动学 长宁 页岩气 

分 类 号：P618.13[天文地球—矿床学]