Petroleum accumulation:from the continuous to discontinuous  

作　　者：Jingzhou Zhao Qing Cao Yubin Bai Chuang Er Jun Li Weitao Wu Wuxian Shen 

机构地区：[1]School of Earth Sciences and Engineering,Shaanxi Key Laboratory of Petroleum Accumulation Geology,Xi'an Shiyou University,Shaanxi 710065,China

出　　处：《Petroleum Research》2017年第2期131-145,共15页石油研究（英文）

基　　金：This work was supported by National Science and Technology Major Project of China(Grant No.2011ZX05007-004 and Grant No.2011ZX05018001-004);National Natural Science Foundation of China(Grant No.41402121 and Grant No.41502132);Natural Science Basic Research Plan in Shaanxi Province of China(Grant No.2013JM5007);Shaanxi Provincial Natural Science Foundation of China(Grant No.2013JQ503).

摘　　要：Based on the extensive studies of conventional and unconventional hydrocarbon accumulations,the concept,classification and formation as well as distribution of petroleum reservoirs are discussed.The revised concept defined the petroleum reservoir as a continuous hydrocarbon accumulation in a single or a set of reservoirs with an independent or uniform pressure system.In terms of the pattern of hydrocarbon accumulation and distribution,the hydrocarbon accumulations are classified into three basic types,i.e.,the continuous accumulation,the quasi-continuous accumulation and the discontinuous accumulation.The hydrocarbon accumulation was demonstrated as a process from continuous accumulation to discontinuous accumulation,and therefore these three basic types of hydrocarbon accumulations were identified.The continuous hydrocarbon accumulation is principally formed in source rocks,and typical examples are shale hydrocarbon reservoirs and coal-bed methane reservoirs;it is mainly characterized by tight-ultra tight reservoirs with permeability of nanodarcy to millidarcy;the hydrocarbons occurred in free,adsorbed or dissolved state;a continuous accumulation comprises actually only a single reservoir,and hydrocarbons are extensively and continuously distributed within the scope of effective source rocks;the accumulation has neither defined boundaries nor bottom or edge water;oil and gas mainly accumulate in situ or near the generation of hydrocarbons with no prominent migration;this hydrocarbon accumulation process is basically not controlled by traps.The quasicontinuous hydrocarbon accumulation mostly occurs in the tight reservoirs adjacent to source rocks,and typical examples are most of tight hydrocarbon reservoirs;the hydrocarbons are distributed quasicontinuously in large areas,and each quasi-continuous hydrocarbon accumulation includes numerous adjacent small-to medium-size reservoirs;reservoirs of this kind of hydrocarbon accumulation have no defined boundaries,no or only local edge and bottom water distribution,and

关 键 词：Petroleum reservoirs Continuous hydrocarbon accumulation Quasi-continuous accumulation Discontinuous accumulation 

分 类 号：P61[天文地球—矿床学]