中国CO2地质封存及增强地热开采一体化的初步探讨

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摘要地热资源作为一种可再生清洁能源，具有较大的开发潜力。对CO2进行地质封存的同时，将CO2作为一种资源，增强地热开采是一种新技术。对2类不同地热资源开采(干热岩型、水热型)与CO2地质封存相结合的一体化技术进行讨论，并针对国内西北某典型咸水层CO2捕获与封存(CCS)示范项目特定地质条件，对比分析相同生产井/注入井条件下，CO2与水分别作为工质流体在井内流动的压力变化，以及二者在2类不同储层条件下各自的热提取率，并进行相应的碳封存量、安全性和经济性分析，发现采用CO2代替水作为工质流体开采地热资源具有显著的优势。数值模拟结果显示，在我国开展CO2地质封存与增强地热开采一体化技术具有较强的可行性。

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关键词 ：水文地质, 地热开采, CO2捕获与封存, 增强型地热系统, CO2捕获、利用和封存

Abstract：As a renewable clean energy，geothermal energy has a great potential development. Using CO2 to enhance the geothermal recovery with simultaneous sequestration of carbon is a novel approach. The integration technology of two current main types(hot dry rock and hydrothermal) of geothermal recovery technology with simultaneous sequestration of carbon is analyzed. Then as for the specific geological conditions of a saline aquifers CCS(CO2 capture and storage) site in the northwest of China，the flow efficiency/pressure change of CO2 and water between the production and injection wells under the same conditions are compared. Moreover，the heating extraction rates of water/CO2 under two different kinds of reservoir conditions are calculated，and then the corresponding amount of carbon sequestration，safety and economic feasibility are analyzed. These results show that CO2 is superior to water in its ability to heat exploitation from the hot reservoir. Therefore，using CO2 to enhance the geothermal recovery with simultaneous sequestration of carbon has a strong feasibility in China.

Key words： hydrogeology geothermal exploitationCO2 capture and storage(CCS) enhanced geothermal systems (EGS) CO2 capture utilization and storage(CCUS)

收稿日期: 2012-11-22

引用本文:

谢和平1，2，熊伦1，2，谢凌志1，2，侯正猛1，2. 中国CO2地质封存及增强地热开采一体化的初步探讨[J]. 岩石力学与工程学报, 2014, 33(sl): 3077-3086.
XIE Heping1，2，XIONG Lun1，2，XIE Lingzhi1，2，HOU Zhengmeng1，2. PRELIMINARY STUDY OF CO2 GEOLOGICAL SEQUESTRATION AND ENHANCEMENT OF GEOTHERMAL EXPLOITATION INTEGRATION IN CHINA. , 2014, 33(sl): 3077-3086.

链接本文:

http://www.rockmech.org/CN/Y2014/V33/Isl/3077

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