应用常规压汞和恒速压汞实验方法研究储层微观孔隙结构——以三塘湖油田牛圈湖区头屯河组为例  

Application of High Pressure Hg Injection and Rate-controlled Hg Penetration Experimental Technique to Studying Reservoir Microscopic Pore Structure:Taking Toutunhe Formation in Niuquanhu Area of Santanghu Oilfield as an Example

作　　者：朱永贤[1] 孙卫[2] 于锋 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]西北大学地质学系,陕西西安710069 [3]中国石油吐哈油田分公司三塘湖采油厂,新疆哈密803009

出　　处：《天然气地球科学》2008年第4期553-556,共4页Natural Gas Geoscience

基　　金：国家重大基础研究发展规划"973"项目(编号:2003CB214600);长江学者和创新团队发展计划(编号:IRT0559)联合资助

摘　　要：吐哈油区三塘湖油田牛圈湖区头屯河组砂岩储层主要为岩屑砂岩,平均孔隙度为19.7%,平均渗透率为77.9×10-3μm2;孔隙类型主要以粒间孔为主,粒间溶孔、长石溶孔和岩屑溶孔次之,碳酸盐溶孔和杂基溶孔很少。通过铸体薄片、扫描电镜、常规高压压汞、恒速压汞等实验手段认识到,研究区砂岩储层的微观孔隙结构复杂,非均质性较强,注水开发水驱油效率差;这主要是由储层的微观非均质性较强所致。The Toutunhe sandstone reservoir in Niuquanhu area of Santanghu oilfield is mainly lithic sandstone, with an average porosity of 19.7%and average permeability of 77.9×10^-3μm^2. The pore structure types are mainly intergranular pore, secondary are intergranular dissolved pore, feldspar dissolved pore, cuttings dissolved pore, and carbonate dissolved pore is seldom. With the help of casting thin slice, scanning electron microscope, conventional mecury penetration, and rate-controlled mercury penetration, this paper indicates that the microscopic pore structure in the sandstone reservoir is complicated, and the anisotropism here is strong, the water flushing efficiency of the water-flooding is low, it is resulted from the reservoir microscopic anisotropism.

关 键 词：孔隙结构 恒速压汞 牛圈湖区 头屯河组 

分 类 号：TE321[石油与天然气工程—油气田开发工程]