沁水盆地和顺区块古构造应力场模拟  

Simulation of Paleotectonic Stress Field in Heshun Block,Qinshui Basin

作　　者：刘建 李鹏翔 包久荣 王飞 LIU Jian;LI Pengxiang;BAO Jiurong;WANG Fei(Tianjin North China General Institute of Geological Exploration,TianJin 300170)

机构地区：[1]天津华北地质勘查总院,天津300170

出　　处：《四川地质学报》2024年第2期204-209,共6页Acta Geologica Sichuan

摘　　要：山西省沁水盆地高煤阶煤层气田具有低压、低渗、低饱和、非均质性强的特征。研究区古构造应力场控制了古地质时期煤储层构造裂隙发育。构造裂隙的发育特征直接影响着煤储层渗透性。本文通过对山西省沁水盆地和顺区块二叠系上石盒子组、三叠系刘家沟组砂岩中29个共轭剪节理观测点的调查,实测了89条节理,据极射赤平投影原理进行分期配套,对中生代以来经历的三期古构造应力场进行了模拟分析,并分析了和顺区块内煤储层裂隙发育特征。The high rank coal coalbed methane field in Qinshui Basin,Shanxi Province is characterized by low pressure,low permeability and low saturation and strong heterogeneity.The paleotectonic stress field in the study area controls the development of tectonic fractures in the paleogeological period.The development characteristics of tectonic fractures directly affect the permeability of coal reservoir.Based on the survey of 29 observation points in Permian Shangshihezi formation and Triassic Liujiagou formation sandstone,Qinshui Basin,Shanxi Province,89joints were measured.According to the principle of polar equatorial projection,the three stages of paleotectonic stress field experienced since the Mesozoic era were simulated and analyzed.

关 键 词：煤储层 共轭剪节理 极射赤平投影 古构造应力场 

分 类 号：P554[天文地球—构造地质学]