Enrichment mechanism and resource potential of shale-type helium:A case study of Wufeng Formation-Longmaxi Formation in Sichuan Basin  

作　　者：Haikuan NIE Quanyou LIU Wei DANG Pei LI Haikun SU Hanyong BAO Liang XIONG Zhujiang LIU Chuanxiang SUN Peixian ZHANG 

机构地区：[1]State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development,Beijing 102206,China [2]Sinopec Key Laboratory of Shale Oil/Gas Exploration and Production Technology,Beijing 102206,China [3]Petroleum Exploration and Production Research Institute,SINOPEC,Beijing 102206,China [4]Institute of Energy Research,Peking University,Beijing 100871,China [5]School of Earth Sciences and Engineering,Xi’an Shiyou University,Xi’an 710065,China [6]School of Energy Resources,China University of Geosciences(Beijing),Beijing 100083,China [7]Research Institute of Exploration and Development,Jianghan Oilfield Company,SINOPEC,Wuhan 430223,China [8]Research Institute of Exploration and Development,Southwest Oil&Gas Company,SINOPEC,Chengdu 610041,China [9]Sinopec Exploration Company,Chengdu 610041,China [10]Research Institute of Exploration and Development,East China Petroleum&Gas Branch,SINOPEC,Nanjing 210019,China

出　　处：《Science China Earth Sciences》2023年第6期1279-1288,共10页中国科学（地球科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.42141021,41872124&42130803).

摘　　要：China’s helium resource is highly dependent on overseas imports.Organic-rich and U/Th-rich shale reservoirs generally contain helium,and although the helium content is low,the total reserve is large.Therefore,the effective development and utilisation of shale-type helium resources is a realistic way to improve the security of helium resources in China.In this study,the generation mechanism,helium source and content,migration modes and pathways,controlling factors of enrichment,distribution pattern,and resource potential of the helium were analysed,using the Wufeng-Longmaxi shale in the Sichuan Basin and its periphery.Furthermore,countermeasures were proposed for shale-type helium exploration and development.The results show that the Wufeng-Longmaxi shale has a high content of U and Th and a good ability to generate helium.The helium is generated by a typical crustal source of helium and is characterised by self-generation,self-storage,and wide distribution.The helium resource potential is a product of its content and the resources of the associated natural gas.The continuous supply of helium and effective preservation are the main geological factors that control the enrichment of shale-type helium.The preliminary evaluation results show that the reserves of helium in proven shale gas reserves are 10.8×10^(8)m^(3)in the Sichuan Basin and its periphery,where the extra-large helium fields are likely to be discovered.Additionally,0.0912×10^(8)m^(3)of helium was produced,along with the annual production of shale gas.To avoid the waste of helium and to improve the self-supply ability,it is suggested that research on the resource potential,enrichment mechanism,and distribution pattern of shale-type helium should be carried out as soon as possible,and helium extraction techniques for helium-bearing natural gas should be studied.

关 键 词：SHALE Helium content Enrichment mechanism Resource potential Sichuan Basin 

分 类 号：P618.13[天文地球—矿床学]