Evaluation of the Shallow Gas Hydrate Production Based on the Radial Drilling-Heat Injection-Back Fill Method

作     者：CHEN Qiang WAN Yizhao WU Nengyou SUN Jianye WANG Jian LIU Changling LI Yanlong LI Chengfeng HU Gaowei CHEN Qiang;WAN Yizhao;WU Nengyou;SUN Jianye;WANG Jian;LIU Changling;LI Yanlong;LI Chengfeng;HU Gaowei

作者机构：Key Laboratory of Gas HydrateMinistry of Natural ResourcesQingdao 266071China Laboratory for Marine Mineral ResourcesLaoshan LaboratoryQingdao 266071China CNPC Offshore Engineering Company LimitedBeijing 100028China Technology Innovation Center for Marine Methane MonitoringMinistry of Natural ResourcesQingdao 266071China 

出 版 物：《Journal of Ocean University of China》 (中国海洋大学学报（英文版）)

年 卷 期：2024年第23卷第1期

页      面：119-128页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

基　　金：financially supported by the Natural Science Foundation of Shandong Province(No.ZR202011030013) the National Natural Science Foundation of China(No.41976205) the Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology(Qingdao)(No.2021QNLM020002) the China Geological Survey Program(No.DD20221704) 

主　　题：shallow gas hydrate trail production radial drilling-heat injection-back fill method experimental and numerical simulation 

摘      要：It has been evidenced that shallow gas hydrate resources are abundant in deep oceans *** geological back-ground,occurrence,and other characteristics differ significantly from deep-seated *** of the high risk of well construction and low production efficiency,they are difficult to be recovered by using conventional oil production *** a result,this paper proposes an alternative design based on a combination of radial drilling,heat injection,and backfilling ***-branch holes are used to penetrate shallow gas hydrate reservoirs to expand the depressurization area,and heat injection is utilized as a supplement to improve gas *** information collected from an investigation site close to the offshore production well in the South China Sea is used to assess the essential components of this plan,including well construction stability and gas production *** demonstrates that the hydraulic fracturing of the 60mbsf overburden layer can be prevented by regulating the drilling fluid ***,the traditional well structure is unstable,and the suction anchor is advised for better mechanical *** gas produc-tion rate can be significantly increased by combining hot water injection and depressurization ***,the suitable produc-tion equipment already in use is discussed.