东—韩地区延长组长2 油层组储层孔隙结构特征
网络出版日期: 2012-02-20
基金资助
“十一五”国家科技支撑计划项目“低(超低)渗透油藏精细描述关键技术与剩余油分布预测模型研究”(编号:2007BAB17B01)资助
Characteristics of pore structure of Chang 2 oil reservoir set of Yanchang Formation in Dong-Han area
Online published: 2012-02-20
姚姚 , 唐文榜 , 奚先 , 王晓梅 . 东—韩地区延长组长2 油层组储层孔隙结构特征[J]. 岩性油气藏, 2012 , 24(1) : 52 -56 . DOI: 10.3969/j.issn.1673-8926.2012.01.010
The property analysis, thin sections, scanning electronic microscope and mercury injection tests were applied to study the characteristics of low permeability reservoir and pore structure and discuss the effect of pore structure on physical properties of low permeability reservoir. The result shows that the pore types include residual
intergranular pores, dissolved pores,intercrystalline pore and micro-fracture,dominated by dissolved pores. Fine throat is the main throat type. Pore throat structure is mainly of middle pore-thin throat,followed by eyelet-thin throat and macropore-medium throat. The greater the pore throat radius is, the better the permeability of low permeability reservoirs is. Sorting coefficient and skewness show the characteristics of low permeability reservoirs such as various types of throat, different sizes and strong microscopic heterogeneity.
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