岩性油气藏 ›› 2019, Vol. 31 ›› Issue (2): 115123.doi: 10.12108/yxyqc.20190213
王华超1, 韩登林1, 欧阳传湘2, 周嘉义1, 王倩倩1, 马力2
WANG Huachao1, HAN Denglin1, OUYANG Chuanxiang2, ZHOU Jiayi1, WANG Qianqian1, MA Li2
摘要: 为揭示库车坳陷下侏罗统致密砂岩储层微孔隙的成因和分布规律,通过薄片分析、扫描电镜、X射线衍射、微米CT扫描、激光共聚焦显微观察等观测手段研究北部构造带内阿合组储层特征。结果表明:微孔隙赋存于塑性矿物,其在平面和垂向上的发育明显受层段压实效应制约,构造应力、埋藏深度均是影响平面压实效应的主要因素,泥质含量是影响垂向压实效应的主要因素。阿合组致密砂岩的微孔隙由黏土矿物晶间微孔隙和杂基微弱溶蚀形成的微孔隙组成。受泥质含量、埋藏深度和构造应力的控制,微孔隙主要发育在泥质含量较低的阿合组二段,分布在埋深浅、构造应力较小的依南4井区。这对形成深部致密气藏具有重要意义。
中图分类号:
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