MOE Key Lab of Marine Reservoir Evolution and Hydrocarbon Enrichment Mechanism, China University of
Geosciences (Beijing) MOLR Key Lab of Shale Gas Resources Survey and Strategic Evaluation, China University
of Geosciences (Bejing)

针对我国深部煤层气资源丰富,但因经济和技术条件有限,很难对其进行常规开采的问题,提出了CO2捕获、利用与封存(CCUS)技术,采用该技术不但可提高深部不可采煤层中CH4的采收率,而且可将CO2有效地封存在深部煤层中,从而达到减排的目的。研究发现:煤阶、煤层压力、煤层渗透率、注入时间、注入气体的组分等都会对生产井中CH4的采收率产生影响,储层的盖层、埋深、构造发育情况、地震活动情况以及地下水条件等会对CO2的封存产生一定的影响。因此,在实施CCUS技术前,要对选区进行合理的评价,以提高项目实施的可行性。

According to the problems that the coalbed methane resource was rich in deep seam in China, but the economic and technology conditions were limited, it would be hard to mine with a conventional method.The CO2 capture, uiliation and storage technology (CCUS) was provided.The application of the technology would not only improve the methane recovery ratio from deep and unmineable seam, but also put CO2 effectively in the deep seam for storage to reach a target of emission re duction.The study showed that a coal rank, coal seam pressure, coal seam permeability, injection time, injected gas types and others would affect to the recovery ratio of methane in a production mine. The cover layer, depth, structure development condition, earthquake activities and the underground water condition would also affect t he storage of CO2.Therefore, before the CCUS project implemented, a rational evaluation should be conducted on the place location in order to improve the feasibility 0 f the project.

“十二五”国家科技支撑计划资助项目(2014BAC18B02)；