超临界CO_2的携热优势及在地热开发中的应用潜力分析  

Advantages of supercritical CO_2 as heat transmission fluid and its application potential in development of geothermal resources

作　　者：张亮[1] 裴晶晶 任韶然[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中国石油新疆油田红山公司,新疆克拉玛依834000

出　　处：《可再生能源》2014年第3期330-334,共5页Renewable Energy Resources

基　　金：中央高校基本科研业务费专项资金资助项目(27R1202007A);青岛市科技计划产学研合作引导计划项目(13-1-4-254-jch);山东省自然科学青年基金项目(ZR2013EEQ032)

摘　　要：利用超临界CO2作为工作介质,循环携带地热或驱替地下热水,是一种新颖的地热开发技术。文章在介绍超临界CO2携热优势的基础上,评价了不同类型地热储层注CO2开采地热的应用潜力。超临界CO2采热能力强,对岩石矿物溶解度小,还可与地质埋存技术相结合,适用于干热岩以及沉积岩地热资源的开发。干热岩开发主要考虑采用超临界CO2作为携热介质,沉积岩地热资源储量丰富、孔隙表面积大、地质条件安全,应是注CO2开采地热和地质埋存的首选。Using supercritical C02 as working fluid for development of geothermal resources is a novel technology, which can be used to transmit the geothermal heat or displace the underground hot water. In this paper, the advantages of using supercritical C02 as heat transmission fluid is summarized, and the application potential in geothermal development by C02 injection into different types of geothermal reservoirs is assessed. Using supercritical C02 as working fluid can achieve an excellent heat mining rate and a very limited capacity of dissolving rock minerals. It also can combine with geological storage to trap most of C02. It may be applied in the development of geothermal energy such as hot dry rocks and some sedimentary geothermal reservoirs. For the hot dry rocks, supercritical C02 as heat transmission fluid is mainly considered. For the sedimentary geothermal reservoirs, C02 injection will be the first choice for geothermal mining and geological storage because sedimentary reservoirs have an abundance of geothermal resources for mining and have greater porous surface and better geological conditions for C02 storage.

关 键 词：超临界CO2 携热介质 干热岩 沉积岩地热储层 地质埋存 

分 类 号：TK52[动力工程及工程热物理—热能工程]