壳源氦气成藏问题及成藏模式

1.中国地质调查局 西安地质调查中心,陕西 西安 710054; 2.中国矿业大学(北京)地球科学与测绘工程学院,北京 100083; 3.中国地质调查局 资源评价部,北京 100037

氦气; 成藏; 弱源; 赋存状态

Several issues in the accumulation of crust-derived helium and the accumulation model
LI Yu-hong1,2,ZHANG Wen1,2,WANG Li3,ZHAO Feng-hua2,HAN Wei1,CHEN Gao-chao1

(1.Xi'an Center,China Geological Survey,Xi'an 710054,China; 2.College of Geoscience and Surveying Engineering,China University of Mining and Technology,Beijing 100083,China; 3.Resources Evaluation Department,China Geological Survey,Beijing 100037,China)

helium; accumulation; weak source; occurrence

DOI: 10.13800/j.cnki.xakjdxxb.2017.0417

备注

氦气作为一种稀有战略资源,在工业和高科技领域应用广泛。目前富氦气藏中被工业利用的氦气资源基本为壳源氦,采自天然气。氦气特殊的气源条件和物理化学性质决定其成藏过程与常规油气有着极大的差别。根据近年来在渭河盆地氦气调查工作中的一些困惑和思考,总结了氦气成藏中亟待探索的3个方面:①不同氦源岩的性质及氦源岩的有效性评价; ②载体气性质及氦气赋存状态对弱源氦气运聚过程中的影响; ③氦气直径最小,其保存的特殊性。在此基础上初步提出了氦气成藏概念模式,认为有效氦源岩、高效运移通道和合适的载体气藏是氦气成藏的关键。研究结果供业内有兴趣的同行批评指正,为寻找氦气资源提供参考和指导。

Helium is widely applied in industry and high-tech field as a kind of rare resource.Nowadays,the vast majority of helium used in industry is collected from natural gas,with the features of crust-derived helium.The special source and physiochemical property of helium make the accumulation far different from conventional oil and gas.According to some confusion and thinking in the research of helium in Weihe Basin,we conclude three aspects awaiting to be studied in helium accumulation:①the properties of different helium source rocks and validity evaluation; ②the influence of carrier gas properties and helium occurrence on the accumulation of weak source helium; and ③the requirement of helium preservation due to the smallest size.On the basis of above discussion,we further put forward the preliminary helium accumulation model,suggesting that the key of helium accumulation are effective helium source rocks,efficient migration pathways and a suitable carrier gas reservoir.The results provide guidance for helium resource exploration,and peer review and criticism are welcomed.