A new method for evaluating the oil mobility based on the relationship between pore structure and state of oil
作者机构：Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient DevelopmentMinistry of EducationNortheast Petroleum UniversityDaqing 163318China Department of Earth and Environmental SciencesThe University of Texas at ArlingtonTX 76019USA Shandong Provincial Key Laboratory of Deep Oil and GasChina University of Petroleum(East China)Qingdao 266580China Research Institute of Exploration and Development of Daqing Oilfield Company Ltd.Daqing 163712China
出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)
年 卷 期：2023年第14卷第6期
页 面：432-449页
核心收录：
学科分类：081803[工学-地质工程] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程]
基 金：supported by the National Natural Science Foundation of China(Grant No.41972156) the Science and Technology Project of Heilongjiang Province(Grant No.2020ZX05A01)
主 题：Qingshankou Formation Sequential extraction NMR T_(1)-T_(2) Free and adsorbed oil Shale oil mobility
摘 要：An accurate evaluation of the shale oil mobility is crucial to its cost-effective *** study presents a method to assess shale oil mobility by integrating the pore structure and oil states ***,a set of three discrete organic extracts(EOM-A,B and C)were obtained by sequential *** relationships among the EOMs and the oil states were inferred from the group compositions and fluorescence properties of the produced shale oil(free state).The results showed that EOMs A and B represent free oil in the open and closed pores,respectively,while the EOM-C represents adsorbed ***,NMR T_(1)-T_(2)map is used to determine the T_(2-cutoff)values that indicate the pore size ranges of different oil *** oil resides mainly in larger pore space(T_(2)0.5 ms),while the adsorbed oil in smaller pore space(0.2 ms0.5 and T_(2-cutoff)1.0 ms suggest that the free oil in connected pores has the highest *** work can provide a reference for evaluating the shale oil potential and prospectivity in other regions.
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