水合物开采过程中影响套管式加热器对井周地层加热效果的数值模拟  

Numerical simulation of heating process of casing heater in natural gas hydrate production wells

作　　者：康家浩 郭威[1,2] 陆程 李冰 贾瑞[1,2] 陆红锋 张鹏宇[1,2] 杨翔 KANG Jiahao;GUO Wei;LU Cheng;LI Bing;JIA Rui;LU Hongfeng;ZHANG Pengyu;YANG Xiang(College of Construction Engineering,Jilin University,Changchun Jilin 130026,China;Key Lab of Drilling and Exploitation Technology in Complex Conditions of Ministry ofNatural Resources,Changchun Jilin 130026,China;Oil and Gas Resources Investigation Center,China Geological Survey,Beijing 100083,China;Guangzhou Marine Geological Survey,China Geological Survey,Guangzhou Guangdong 510075,China)

机构地区：[1]吉林大学建设工程学院,吉林长春130026 [2]自然资源部复杂条件钻采技术重点实验室,吉林长春130026 [3]中国地质调查局油气资源调查中心,北京100083 [4]中国地质调查局广州海洋地质调查局,广东广州510075

出　　处：《探矿工程（岩土钻掘工程）》2019年第6期1-7,共7页Exploration Engineering:Rock & Soil Drilling and Tunneling

基　　金：中国地质调查局项目(编号:DD20190232)

摘　　要：套管式加热器在维持孔壁稳定的同时还可实现对井周地层加热,以防止水合物开采过程中井周形成二次水合物。为分析水合物开采过程中日产水量、气水比和加热功率对井周地层温度分布的影响,采用COMSOL Multiphysics对加热过程进行模拟。模拟结果表明,日产水量对加热效果的影响明显大于加热功率,加热功率主要影响近井段的地层温度,气水比主要影响加热半径。通过数值模拟对套管加热器的加热效果进行了分析和评价,对天然气水合物的经济高效开采具有指导意义。The casing heater,besides maintaining the stability of the well wall,can also heat wellbore formation to prevent the generation of secondary hydrates in the well during the gas hydrate production process.In order to analyze the influence of daily water production,gas-water ratio and heating power on the temperature distribution in the surrounding formation during the gas hydrate production process,the heating process was simulated by COMSOL Multiphysics.The simulation results show that the effect of water production rate on the heating effect is obviously greater than the heating power;while the heating power mainly affects the temperature of the near-well formation,and the gas-water ratio mainly affects the heating radius.The numerical simulation is used to analyze and evaluate the heating effect of the casing heater,which provides guide for the economical and efficient production of natural gas hydrate.

关 键 词：套管式加热器 加热功率 二次水合物 日产水量 气水比 数值模拟 

分 类 号：P634[天文地球—地质矿产勘探]