基于岩石铸体切片与恒速压汞测试的储层孔隙分布表征及差异机制剖析——以鄂尔多斯盆地某区块延长组长2段为例  

Characteristics of Reservoir Pore Size Distribution Based on Thin Section and Rate-controlled Mercury Injection and Its Differential Mechanisms: An Example of Chang-2 Reservoir of Yanchang Formation in a Block of Ordos Basin

作　　者：庞姗[1,2] 梅启亮 张洪军[3] 汪贺 孙彤 关平[1,2] 师永民[1,2] PANG Shan;MEI Qiliang;ZHANG Hongjun;WANG He;SUN Tong;GUAN Ping;SHI Yongmin(School of Earth and Space Science, Peking University, Beijing 100871;Oil and Gas Institute, Peking University, Beijing 100871;The First Oil Production Plant, Changqing Oilfield Company, PetroChina, Yan’an 716000)

机构地区：[1]北京大学地球与空间科学学院,北京100871 [2]北京大学石油与天然气研究中心,北京100871 [3]中国石油天然气股份有限公司长庆油田分公司第一采油厂,延安716000

出　　处：《北京大学学报（自然科学版）》2019年第5期907-914,共8页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家油气重大专项(2017ZX05013005-009)资助

摘　　要：以鄂尔多斯盆地某区块延长组长2段为研究对象,联合场发射扫描电镜与图像处理技术,开展铸体切片观察和处理以及恒速压汞测试,并对其表征的孔隙分布特征进行统计及差异机制分析。对铸体切片进行阈值划分图像二值化处理后,得到孔径分布具有连续性等优点。与恒速压汞得到的孔径分布进行比较,发现二者在反映主体孔径时具有一致性。Chang-2 member of Yanchang Formation in a block of Ordos Basin is taken as the research object, combined with field emission scanning electron microscopy(FESEM) and image processing technology, to observe and process thin section photos and to test rate-controlled mercury injection respectively, by which the pore size distribution and their differential mechanisms is represented via using statistics method. Compared with the pore size distribution obtained by rate-controlled mercury injection and by thin section after the threshold value divided and binaryzation process, the two methods are consistent in reflecting the main pore size, and the pore size distribution obtained by thin section has the advantage of continuity.

关 键 词：孔隙结构 孔径分布 铸体切片 恒速压汞 

分 类 号：P618.13[天文地球—矿床学]