Assessment of in-situ CO_(2)Sequestration Potential and Enhanced Coalbed Methane(ECBM)Production of Continental Coal-bearing Basins in China  

作　　者：LI Yaohua WANG Yang BI Caiqin WANG Qianyou SHI Yu XU Yinbo YUAN Yuan TONG Lihua TANG Yue SHAN Yansheng LIU Weibin 

机构地区：[1]Oil and Gas Survey,China Geological Survey,Beijing 100083,China [2]State Key Laboratory of Continental Shale Oil,Beijing 100083,China [3]School of Earth and Space Sciences,Peking University,Beijing 100871,China [4]Department of Earth,Ocean and Ecological Sciences,University of Liverpool,Liverpool L693GP,UK [5]Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China

出　　处：《Acta Geologica Sinica(English Edition)》2024年第6期1602-1614,共13页地质学报（英文版）

基　　金：funded by the National Natural Science Foundation of China under Grant Numbers 42202179 and U2244207;supported by the National Key Laboratory of Petroleum Resources and Engineering at the China University of Petroleum,under Project Number PRP/open-2217;Further support came from the State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development;a part of the'National Coal Seam(Series)Gas Geological Survey and Evaluation,a project number DD20240051 under the China Geological Survey。

摘　　要：The utilization of CO_(2)-Enhanced Coal Bed Methane(CO_(2)-ECBM)technology is pivotal in realizing the environmentally responsible and efficient exploitation of Coalbed Methane(CBM)energy resources.The optimization of carbon capture,utilization,and storage(CCUS)for carbon reduction mandates a nuanced understanding of the diverse geological attributes present in CBM reserves globally.Traditional estimations of CO_(2)-ECBM's carbon sequestration potential have predominantly relied on rudimentary empirical models,notably those proposed by the United States Department of Energy(DOE),which overlook the intrinsic geological conditions and the physicochemical properties of subsurface fluids.Addressing these limitations,our study implements the advanced DR/Henry mixed adsorption model in tandem with the Peng-Robinson equation of state(PR-EOS).This approach meticulously identifies the critical parameters governing the mass exchange ratios between CO_(2)and CH_(4),pertinent to in-situ geological environments.Subsequently,we have formulated a comprehensive carbon sequestration potential assessment framework.This innovative model adheres to the mass conservation principles for individual CO_(2)and CH_(4)components,taking into account the specific surface and stratigraphic conditions prevalent.Employing this refined methodology,we evaluated the CO_(2)-ECBM carbon sequestration potential of the 40 evaluation units of extensional,compressive,and cratonic continental coal bearing basins in China's three major temperature-pressure systems across different depth domains and coal ranks within 2000 m.Our findings reveal that the theoretical carbon sequestration capacity of China's continental coal-bearing basins is approximately 59.893 billion tons.Concurrently,the potential ECBM output stands at an estimated 4.92 trillion cubic meters,underscoring the substantial environmental and energy benefits inherent in harnessing CO_(2)-ECBM technology effectively.The regional analysis revealed that North and Northwest China hold the highest

关 键 词：CO_(2)-ECBM in-situ geological sequestration mass exchange ratio carbon sequestration potential assessment T-P system coal basins 

分 类 号：X701[环境科学与工程—环境工程] TE37[石油与天然气工程—油气田开发工程]