准噶尔盆地车排子地区侏罗系低渗砂岩储层孔隙结构特征及影响因素  

Pore Structure and Influence Factors of the Jurassic Low Permeability Sandstone Reservoir in the Chepaizi Area of the Junggar Basin

作　　者：安劲松[1,2] 王振奇[1,2] 周凤娟 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,湖北荆州434023 [2]长江大学地球科学院,湖北荆州434023 [3]中海石油有限公司深圳分公司,广州510240

出　　处：《地质调查与研究》2011年第1期47-52,共6页Geological Survey and Research

基　　金：国家自然科学基金:基准面旋回理论解析与定量层序地层模型(40572078)国家自然科学基金:三角洲储层密井网地质知识库建立及其应用(40602013)

摘　　要：本文利用钻井取芯资料和铸体薄片、扫描电镜、X衍射等分析化验资料,对准噶尔盆地车排子地区侏罗系低渗储层的孔隙结构特征及影响因素进行了研究。结果表明:该区孔隙类型多样,孔径中等偏小;排驱压力和中值毛管压力偏高,喉道细小;孔喉分选较差、连通性较差、孔隙结构非均质性强。孔小喉细、渗透率低的主要原因有三方面:原始孔渗条件差;砂岩粒径大小不一、岩屑含量高、普遍含塑性岩屑、含煤导致压实作用强;溶蚀对象主要是颗粒,对孔隙和喉道改善作用不大,同时溶蚀产物不能有效迁移,堵塞孔喉,降低渗透率。Based on the analysis of the drilling core,cast thin section,scanning electronic microscope and X-Ray Diffraction,pore structure and influencing factors in the Chepaizi area of the Junggar Basin are studied.Results show that there are many kinds of pore types,and the pore size is moderate and small.Displacement pressure and median pressure are high,and the throats are small.The ores and throats have poor sorting,the connectivity is poor too,and the pore structure has strong heterogeneity.The causes of the small pore throat and low permeability are as follows： 1） The original porosity and permeability are bad.2） Dimegaly grains,high debris content common plastic debris content and coal-bearing characteristics cause strong compaction.3） The dissolution objects are mainly grains,and the dissolution products can not effectively migrate.They plug pores and throats,and reduce the permeability.

关 键 词：孔隙结构 低渗储层 侏罗系 车排子地区 准噶尔盆地 

分 类 号：P618.130.21[天文地球—矿床学]