Mechanical Modeling and Analysis of Stability Deterioration of Production Well During Marine Hydrate Depressurization Production

作     者：SUN Huan-zhao CHANG Yuan-jiang SUN Bao-jiang WANG Kang CHEN Guo-ming LI Hao DAI Yong-guo SUN Huan-zhao;CHANG Yuan-jiang;SUN Bao-jiang;WANG Kang;CHEN Guo-ming;LI Hao;DAI Yong-guo

作者机构：Centre for Offshore Engineering and Safety TechnologyChina University of Petroleum(East China)Qingdao 266580China School of Petroleum EngineeringChina University of Petroleum(East China)Qingdao 266580China Jiangsu Shuguang Oil Tools Co.LtdTaizhou 225532China 

出 版 物：《China Ocean Engineering》 (中国海洋工程（英文版）)

年 卷 期：2024年第38卷第2期

页      面：338-351页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0817[工学-化学工程与技术] 08[工学] 0818[工学-地质资源与地质工程] 0903[农学-农业资源与环境] 082002[工学-油气田开发工程] 

基　　金：financially supported by the National Natural Science Foundation of China(Grant No.51890914) 

主　　题：natural gas hydrate production well depressurization production formation deformation stability deterioration 

摘      要：Different from oil and gas production,hydrate reservoirs are shallow and unconsolidated,whose mechanical properties deteriorate with hydrate ***,the formations will undergo significant subsidence during depressurization,which will destroy the original force state of the production ***,existing research on the stability of oil and gas production wells assumes the formation to be stable,and lacks consideration of the force exerted on the hydrate production well by formation subsidence caused by hydrate decomposition during *** fill this gap,this paper proposes an analytical method for the dynamic evolution of the stability of hydrate production well considering the effects of hydrate *** on the mechanical model of the production well,the basis for stability analysis has been proposed.A multi-field coupling model of the force state of the production well considering the effect of hydrate decomposition and formation subsidence is established,and a solver is *** analytical approach is verified by its good agreement with the results from the numerical method.A case study found that the decomposition of hydrate will increase the pulling-down force and reduce the supporting force,which is the main reason for the stability *** higher the initial hydrate saturation,the larger the reservoir thickness,and the lower the production pressure,the worse the stability or even *** work can provide a theoretical reference for the stability maintaining of the production well.