氦气的天然气地质意义

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摘要氦气具有的不易液化、稳定性好、扩散性强等特点，使它既能在天然气藏中富集，又能垂向运移至地表。氦有大气氦、壳源氦和幔源氦3种来源。3He主要来源于地幔；4He主要来源于地壳，通常以R/Ra来表示氦的来源。氦气具有丰富的天然气地质意义：地表氦气浓度异常有一定油气指示意义；氦气的同位素分布特征值（R/Ra）还具有指示油气构造环境、指示断裂带及旁证CO2气藏的成因等地质意义。

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Abstract：As radon gas has such physical-chemical characteristics as reluctance to liquidation, good stability and strong dispersion capacity, it can not only concentrate in the natural gas accumulation but also migrate vertically to the surface. Radon has three kinds of sources: atmospheric radon, crust-derived radon and mantle-derived radon. 3He is derived mainly from the mantle, 4He comes mainly from the crust, and R/Ra is commonly used to signify the source of radon. Radon gas has rich natural gas geological implications: the surface radon gas concentration has certain oil-gas indication significance, and the isotopic distribution characteristic value of radon gas R/Ra has such geological implications as the indication of the oilgas structural environment and fault zone and the implication of the genesis of the CO2 gas accumulation.

出版日期: 2009-04-10

引用本文:

李广之高伟江浩庄原. 氦气的天然气地质意义[J]. 物探与化探, 2009, 33(2): 154-156.
LI Guang-Zhi, GAO Wei, JIANG Hao, ZHUANG Yuan. GEOLOGICAL IMPLICATIONS OF RADON GAS. Geophysical and Geochemical Exploration, 2009, 33(2): 154-156.

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