自生热体系开采天然气水合物效果评价  

Effect Evaluation of Natural Gas Hydrate Production by Thermal Chemical Reaction System

作　　者：孙振鑫 王亚楠[1,2] 李清平 吕鑫 葛阳 SUN Zhen-xin;WANG Ya-nan;LI Qing-ping;LYU Xin;GE Yang(Northeast Petroleum University,Daqing Heilongjiang 163318,China;State Key Laboratory of Natural Gas Hydrates,Beijing 100028,China)

机构地区：[1]东北石油大学,黑龙江大庆163318 [2]天然气水合物国家重点实验室,北京100028

出　　处：《当代化工》2023年第1期77-81,共5页Contemporary Chemical Industry

基　　金：天然气水合物国家重点实验室开放基金课题,天然气水合物藏自生热气体置换法作用机理及影响因素研究(项目编号:2020-YXKJ-014);东北石油大学引导性创新基金,天然气水合物藏原位补热置换体系研制及作用机理研究(项目编号:2021YDL-28)。

摘　　要：置换开采天然气水合物方法有避免地质灾害的优点,但其工艺复杂且置换效率低。为此,提出了一种利用自生热体系(亚硝酸钠、氯化铵、盐酸、氯化钙)反应释放的热量和氮气开采天然气水合物的方法。在已经优化的体系配方基础上,模拟天然气水合物藏低温高压(4℃、8MPa)的条件下开展自生热体系开采天然气水合物及CO_(2)开采天然气水合物效果对比实验,结合气相色谱分析结果计算两种方法的开采效率。结果表明:自生热体系1h内的开采效率可达59.24%,比CO_(2)的开采效率高32个百分点。研究成果为该体系在天然气水合物开采实验中的应用提供了依据。Displacement extraction of natural gas hydrate has the advantage of avoiding geological disasters,but its process is complex and its displacement efficiency is low.Therefore,a method of exploiting natural gas hydrate by using the heat released from the reaction of thermal chemical reaction system(NaNO_(2),NH_(4)Cl,HCl and CaCl_(2))and nitrogen was proposed.Based on the optimized system formula,the comparative experiment of natural gas hydrate production by thermal chemical reaction system and natural gas hydrate production by CO_(2)under the conditions of low temperature and high pressure(4℃,8 MPa)of natural gas hydrate reservoir was carried out,and the production efficiency of the two methods was calculated combined with the results of gas chromatography analysis.The results showed that the recovery efficiency of thermal chemical reaction system reached 59.24%within 1 h,32 percentage points higher than that of CO_(2)replacement method.The research results provide a basis for the application of the system in natural gas hydrate production experiment.

关 键 词：天然气水合物 自生热体系 气相色谱 开采效率 

分 类 号：TE624[石油与天然气工程—油气加工工程]