海洋天然气水合物开采方法及产量分析  

Modeling of natural gas recovery from a hydrate reservoir well

作　　者：窦斌[1,2] 蒋国盛[1] 吴翔[1] 张凌[1] 宁伏龙[1] 

机构地区：[1]岩土钻掘与防护教育部工程研究中心,湖北武汉430074 [2]中原油田钻井院,河南濮阳457001

出　　处：《热带海洋学报》2009年第3期82-84,共3页Journal of Tropical Oceanography

基　　金：国家自然科学基金项目(50504012);国家自然科学基金项目(50844062);中国博士后科学基金项目特别资助(2008010274);中国博士后科学基金项目(20080430124);教育部国际合作项目(2008052017)联合资助

摘　　要：海洋天然气水合物的巨大储量刺激了世界各国能源部门努力研究如何从天然气水合物储层生产天然气。根据水合物形成的条件,只有当水合物处在其相平衡条件以外,水合物才能分解。因此,水合物的开采方法只能为热熔法、抑制剂刺激法、减压法和地面分解法。为了对天然气水合物储层中气体的生产有个定量的评估,本文以水合物开采井为例,运用数学方法推导了水合物井中气体的产生量。结果表明,在天然气水合物储层中,天然气释放量是井内水合物分解温度、压力及水合物层气体渗透性的敏感函数。该函数可以用于天然气水合物井气体开采量的计算及对水合物储层可开采性评价。The authors explore the potential of gas hydrates as a source of energy. They discuss the methods for gas production from gas hydrates, which is widely available in permafrost and oceanic sediments. These hydrocarbon deposits have stimulated worldwide efforts to understand gas production from hydrate dissociation in hydrate reservoir wells. According to formation conditions of gas hydrates, the production of gas hydrates can only be done through thermal injection, inhibitor injection, or depressurization. In order to quantitatively assess gas production of natural gas hydrate reservoirs, a gas hydrate exploration well was used as an example to derive the gas volume produced from hydrate reservoir wells by using mathematical methods. The results show that in gas hydrate reservoirs, the gas volume released from reservoir wells is a sensitive function of temperature and pressure of the boreholes and permeability of the gas hydrate. The function can be used to calculate gas volume produced from gas hydrate wells and to evaluate the recoverability of gas hydrate reservoirs.

关 键 词：天然气水合物 天然气生产 水合物分解 能源 数学模型 

分 类 号：P744.4[天文地球—海洋科学]