黔南地区～3km油气深孔地应力测量与构造应力场分析  

In-situ stress determination of 3km oil-gas deep hole and analysis of the tectonic stress field in the southern Guizhou

作　　者：曹慧 孙东生[1] 苑坤 李阿伟[1] 张光晗 CAO Hui;SUN Dongsheng;YUAN Kun;LI Awei;ZHANG Guanghan(Institute of Geomechanics,Chinese Academy of Geological Sciences,Key Laboratory of Neotectonic Movement and Geohazard,Ministry of Land and Resources,Beijing 100081,China;China University of Geosciences,Beijing,China;Oil&Gas Survey Center,China Geological Survey,Beijing 100029,China;China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国地质科学院地质力学研究所,自然资源部新构造与活动构造重点实验室,北京100081 [2]中国地质大学(北京),北京100083 [3]中国地质调查局油气资源调查中心,北京100029 [4]中国石油大学(北京),北京102249

出　　处：《中国地质》2020年第1期88-98,共11页Geology in China

基　　金：中国地质调查局项目“重点地区构造体系及油气页岩控藏条件调查”(DD20190085);国家自然科学基金(41404080)联合资助~~

摘　　要：地应力大小和方向信息是非常规油气勘探开发及区域构造应力场特征分析的重要基础数据。为了解黔南紫云地区的现今地应力状态,采用基于钻孔岩心的非弹性应变恢复(ASR)地应力测量方法,获取了紫云地区2877~2985 m石炭系打屋坝组地层的地应力信息,分析了区域构造应力场特征,探讨了油气保存条件。结果表明:(1)黔南紫云地区近3 km处石炭纪地层现今地应力状态表现为以垂向应力为主的应力环境,测点处最大水平主应力方向近SN向。(2)紫云地区近3 km处岩心实测最大水平主应力方向与燕山早期古构造应力场最大主应力方向大致相同,一定程度上反映了燕山末期-喜马拉雅运动对次生油气藏的改造程度较小,有利于黔南坳陷内部油气藏的保存。The magnitude and direction of stress are important basic data for unconventional oil and gas exploration and analysis of regional tectonic stress field.In order to find out the present stress state in southern Guizhou area,the authors applied the Anelastic Strain Recovery(ASR)method to obtain the in-situ stress state in Carboniferous Dawuba Formation of southern Guizhou Area(Qianziye-1 well)ranging from 2877 to 2985 m in depth.Based on the features of regional tectonic development in Qiannan depression,the authors investigated the characteristics of regional tectonic stress field and the preservation conditions of oil and gas.The results show that the Carboniferous Dawuba Formation in southern Guizhou area gas retaining the normal fault stress regime,the orientation of maximum horizontal principal stress at the measuring point was in nearly SN direction,which was the same as the maximum principal stress direction of the paleotectonic stress field in the Yanshanian period.The late tectonic movements occurred mainly along faults,which suggests a relatively minor damage to the secondary oil and gas pools during the last phase of YanshanHimalayan movement.It is conducive to the preservation of oil and gas reservoirs in Qiannan depression.

关 键 词：页岩气 黔南坳陷 地应力 非弹性应变恢复法 油气保存 钻井 油气勘查工程 贵州 

分 类 号：P634[天文地球—地质矿产勘探]