Numerical study on the effect of reservoir heterogeneity and gas supply on hydrate accumulation in subsea shallow formations
作者机构：School of Petroleum EngineeringChina University of Petroleum(East China)Qingdao266580China Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China))Ministry of EducationQingdao 266580China Zhongyuan OilfieldSinopecPuyang457000China Lusheng CompanyShengli OilfieldSinopecDongying257000China Department of Petroleum EngineeringChengde Petroleum College067000China
出 版 物：《Petroleum Research》 (石油研究（英文）)
年 卷 期：2021年第6卷第2期
页 面：91-115页
核心收录：
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学]
基 金：This research is supported by the Fundamental Research Funds for the Central Universities(No.15CX05036A,18CX05009A) the National Key Basic Research Program 973 project(No.2015CB251201) It is also partially financed by the National Major S&T Project(No.2016ZX05056004-003) the General Project of Shandong Natural Science Foundation(ZR2020ME090) the National Natural Science Foundation of China(No.51974347)
主 题：Hydrate accumulation Mixed-flux model Reservoir simulation Reservoir heterogeneity Gas source condition
摘 要：Seepage-type gas hydrate accumulation in subsea shallow formations involves complicated thermohydro-solid coupling processes and matching problem between various accumulation *** physical properties control local natural gas migration pathway and thus the final reservoircharacteristics of *** this paper,a novel mixed-flux model for gas hydrate accumulation isestablished and then used to simulate the process of methane gas migration into the shallow stratum toform a hydrate *** effects of reservoir heterogeneity and gas source conditions on the distribution of pore fluid and hydrate accumulation are *** simulation results show thatreservoir heterogeneity is conducive to the retention and lateral migration of CH4 in a hydrate ***4 can contact more pore water to form a large hydrate reserve,but the formed hydrate is ***-permeability layers enhance the trapping of CH4 and form a uniform and large ***,gas source conditions have an important impact on the hydrate accumulation *** gas flux,small pore water flux,continuous gas supply,high content of heavy components in natural gas,and numerous gas source points contribute to large amounts of hydrates generationin a certain time *** presented work will deepen our understanding of the controls of natural gashydrate systems in subea shallow formations.
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