Shale micro–nano pore structure characteristics in the lower third member of the continental Shahejie Formation, Zhanhua Sag
LI Tingwei1,2, JIANG Zhenxue1,2, XU Chenlu3, ZHU Rifang4, LI Xin1,2, CHEN Weitao1,2, NING Chuanxiang1,2, WANG Zhi1,2
1 State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum-Beijing, Beijing 102249, China 2 Unconventional Natural Gas Research Institute, China University of Petroleum-Beijing, Beijing 102249, China 3 Key Laboratory of Petroleum Resource Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 4 China Research Institute of Geosciences, SINOPEC Shengli Oilfield Company, Dongying 257015, China
Since shale oil mainly occurs in shale pores, research into the pore structure characteristics is key to understand the mechanism of shale oil accumulation. Shale micro–nano pore structure in the continental Es3lFormation in the Zhanhua Sag is qualitatively and quantitatively characterized with FE-SEM, CO2 adsorption, N2adsorption, and high pressure mercury injection. Results show that four kinds of pores are present in the Es3l shale. These are organic pores, intergranular pores, intraparticle pores, and micro-fractures. Micropores, mesopores and macropores are developed in the shale samples. Macropores have a rather greater capacity for providing pore volume than do micropores and mesopores, accounting for about 60.61% and providing major reservoir space and seepage paths for shale oil. Micropores are dominant in surface area, accounting for about 87.87% and are the main site for shale oil adsorption.
李廷微，姜振学，许辰璐，朱日房，李鑫，陈委涛，宁传祥，王智. 沾化凹陷沙三下亚段陆相页岩储层微—纳米孔隙结构特征[J]. 石油科学通报, 2017, 2(4): 445-456. LI Tingwei, JIANG Zhenxue, XU Chenlu, ZHU Rifang, LI Xin, CHEN Weitao, NING Chuanxiang, WANG Zhi. Shale micro–nano pore structure characteristics in the lower third member of the continental Shahejie Formation, Zhanhua Sag. Petroleum Science Bulletin, 2017, 2(4): 445-456.