Review of CO_(2)-kerogen interaction and its effects on enhanced oil recovery and carbon sequestration in shale oil reservoirs  

作　　者：Mingzhe Dong Houjian Gong Qian Sang Xinyi Zhao Chaofan Zhu 

机构地区：[1]School of Petroleum Engineering,China University of Petroleum(East China),Qingdao,266580,China [2]Department of Chemical and Petroleum Engineering,University of Calgary,Calgary,AB T2N 1N4 Canada [3]College of Construction Engineering,Jilin University,Changchun 130026,Jilin,China

出　　处：《Resources Chemicals and Materials》2022年第1期93-113,共21页资源化工与材料（英文）

基　　金：supports by the Natural Science Foundation of China(42090024,51774310);by a Discovery Grant of Natural Sciences and Engineering Council(ESERC)of Canada.

摘　　要：Shale oil resources have proven to be quickly producible in large quantities and have recently revolutionized the oil and gas industry.The oil content in a shale oil formation includes free oil contained in pores and trapped oil in the organic material called kerogen.The latter can represent a significant portion of the total oil and yet pro-duction of shale oil currently targets only the free oil rather than the trapped oil in kerogen.Shale oil reservoirs also have a substantial capacity to store CO_(2)by dissolving it in kerogen.In this paper,recent progress in the research of CO_(2)-kerogen interaction and its applications in CO_(2)enhanced oil recovery and carbon sequestration in shale oil reservoirs are reviewed.The relevant topics reviewed for this relatively new area include charac-terization of organic matter,supercritical CO_(2)extraction of oil in shale,experimental and simulation study of CO_(2)-hydrocarbons counter-current diffusion in organic matter,recovery of oil in kerogen during CO_(2)huff‘n’puffprocess,and changes in microstructure of shale caused by CO_(2)-kerogen interaction.The results presented in this paper show that at reservoir conditions,supercritical CO_(2)can spontaneously replace the hydrocarbons from the organic matter of shale formations.This mass transfer process is the key to releasing organic oil saturation and maximizing the capacity of carbon storage of a shale oil reservoir.It also presents a concern of the structure change of organic materials for long term CO_(2)sequestration with shale or mudstone as the sealing rocks.

关 键 词：Shale oil reservoir Organic matter Supercritical CO_(2)-kerogen interaction Counter-current diffusion Enhanced oil recovery CO_(2)sequestration 

分 类 号：P61[天文地球—矿床学]