深水天然气水合物降压开采增产稳产影响因素分析  

Factors influencing production enhancement and stabilization in deepwater natural gas hydrate depressurization exploitation

作　　者：张书炜 高永海[1] 尹法领 陈杰 ZHANG Shuwei;GAO Yonghai;YIN Faling;CHEN Jie(College of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《石油化工》2025年第3期444-450,共7页Petrochemical Technology

基　　金：国家自然科学基金项目(U21B2065,52274022);山东省重点研发计划项目(2022CXGC020407)。

摘　　要：综述了有关深水天然气水合物(NGH)降压开采增产稳产的中型或大型试验研究,并对NGH产气和出砂的影响因素进行了分析。研究结果表明,NGH产气量和产气速率主要受孔隙度(颗粒粒径)、NGH饱和度、NGH分布非均质性等传质因素,以及导热系数、开采温度等关键传热因素的影响。储层强度降低及NGH分解后产生的气和水为砂提供的运移驱动力是储层出砂的主要原因。储层出砂的严重程度依赖于NGH的存在状态、砂砾粒径、有效围压及防砂介质等因素。Medium-and large-scale experimental studies on production enhancement and stabilization in depressurization exploitation of deepwater natural gas hydrate(NGH)were reviewed,and the factors influencing gas production and sand production in NGH exploitation were analyzed.The results show that the gas production volume and rate of NGH are mainly affected by mass transfer factors such as porosity(particle size),NGH saturation,and heterogeneity of hydrate distribution,as well as key heat transfer factors such as thermal conductivity and exploitation temperature.The reduction in reservoir strength and the driving force for sand migration generated from the gas and water produced after NGH decomposition are the primary causes of sand production in reservoirs.The severity of sand production in reservoirs depends on factors such as the state of NGH presence,sand particle size,effective confining pressure,and sand control media.

关 键 词：天然气水合物 降压开采 防砂 产气 传质和传热 

分 类 号：TE28[石油与天然气工程—油气井工程]