页岩储层润湿性及孔隙结构对吸附特征的影响  

The Impact of Wettability and Pore Structure on the Adsorption Characteristics in Shale Reservoir

作　　者：范青云 

机构地区：[1]中国石油长城钻探公司地质研究院,辽宁盘锦124010

出　　处：《重庆科技学院学报（自然科学版）》2016年第5期10-13,共4页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家科技重大专项"大型油气田及煤层气开发"(2011ZX05015)

摘　　要：采用氮气吸附法和高压压汞法对基质孔隙和有机质孔隙进行分类,并构建了2个分段函数模型对吸附特征进行描述。结果表明,有机质孔隙表面为油润湿,基质孔隙表面为水润湿,且水相接触角和油相铺展程度差异较大。在储层温度和压力条件下,页岩气属于气相多层吸附,采用Langmuir单分子层模型和L-F多分子层模型组成的分段函数拟合程度更高。The matrix pores and organic matter pores were studied by the use of nitrogen adsorption method and high pressure mercury injection method. Two partition function modes are built to describe the adsorption characteris- tics. The results show that： the organic pore surface is oil phase wetting; matrix pore surface is water phase wet- ting, and water contact angle and oil phase spreading degree have large difference. Under the situation of reservoir temperature and pressure, the shale gas belongs to steam phase and multilayer adsorption. The experimental results show that the piece - wise function model constituted by the Langmuir single layer model and the L - F multi molecular layer model has higher fitting degree.

关 键 词：润湿性 孔隙结构 赋存场所 多层吸附 分段函数 

分 类 号：P618.13[天文地球—矿床学]