鄂尔多斯盆地姬塬长2油层组低渗透砂岩孔隙结构对储层质量影响  

Influence of Pore-Throat Sizes on Reservoir Quality of Low-Permeability Sandstone of Chang 2 Oil-Bearing Bed from the Jiyuan,Ordos Basin

作　　者：胡作维[1] 黄思静[1] 李小宁[1] 齐世超[1] 郎咸国[1] 

机构地区：[1]成都理工大学油气藏地质及开发工程国家重点实验室,沉积地质研究院,四川成都610059

出　　处：《新疆地质》2012年第4期438-441,共4页Xinjiang Geology

基　　金：国家科技重大专项(2008ZX05001-004-03);成都理工大学中青年骨干教师培养计划(KYGG201208)项目联合资助

摘　　要：微观孔隙结构是低渗透砂岩储层质量重要影响因素之一。通过铸体薄片、常规物性及高压压汞等分析表明,鄂尔多斯盆地姬塬地区长2油层组低渗透砂岩储层孔隙度、渗透率与最大孔喉半径、中值孔喉半径、分选系数、变异系数间具正相关关系,与孔喉半径均值(φ)、结构系数间具负相关关系,与非汞饱和孔喉体积、歪度间无明显相关关系。这些孔隙结构参数可简化为3个相对独立主因子:①有效半径因子;②无效半径因子;③弯曲度因子。The pore-throat size is one of important influential factors to the reservoir quality of low-permeability sandstones.The analyses of the resin impregnated thin sections,routine physical properties and high-pressure mercury injection indicate that there are distinct positive pertinences between the porosity, permeability and the largest pore-throat radius,median pore-throat radius,sorting coefficient,variation coefficient,the distinct negative pertinences between the porosity, permeability and the mean pore-throat radius,texture coefficient,the uncertain pertinences between the porosity, permeability and the non-mercury saturated pore-throat volumes,skewness.These pore-throat size parameters could be simplified to three relatively independent main factors：the first main factor-effective radius factor, the second main factor-invalid radius factor, the third main factor-curvature factor.

关 键 词：鄂尔多斯 孔隙结构 低渗透砂岩 储层质量 长2油层组 

分 类 号：P618.130.21[天文地球—矿床学]