Volume Evaluation of the Gas Mixed With Other Gases Using Carbon Isotopic Compositions
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摘要: 自然界不同源天然气的混合是一种普遍现象。混合作用是一种物理过程，混合气中某一组份的含量为该组份在各种来源气中的含量以其体积比例为权的和。因此，根据混合气的碳同位素以及被混合的气的碳同位素丰度可确定出各种被混合的气的比例。文章根据这一原理对廊固凹陷河西务构造带天然气的混合比例进行了计算，结果表明混合气中有２４%～６３%是来自石炭－二叠系的煤成气。在实际应用中，确定典型气的甲烷碳同位素丰度是基础，根据天然气甲烷同位素丰度与其源岩热演化成熟度Ｒｏ有线性关系的原理，可利用研究区源岩的Ｒｏ来确定本区的煤成气或油型气甲烷碳同位素的丰度。Abstract: Mixing of gases from different origins is universal phenomenon in nature. The concentration ofeach component in the gas mixtureis the sum of all the volume ratio.The relationship of isotopic compositronscomponent mixed in the mixture weighted byofltsand ratioes was verified in the laboratory. Its ap-plication to the Hexiwu structure zone in the Lang-Gu depression showed 24-63 percentage of the gasesis from the Cardorriferous and Perenan coal system.
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Key words:
- carbon isotope /
- origin of gases /
- mixing of gases /
- esource evaluation /
- Lang-Gu depression
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[1] 1 戴金星.戚厚发等.鉴别煤成气和油型气若}几指标的初步探讨.石油学报.1985, 6(2): 31-38.
2 朱家蔚.许化政等.东澄凹陷煤成气地化指标及其与油成气的对比.石油与天然气地质.1985, 6(3): 272-279.
3 Schole M. The hydrogen and carbon isotopic composition ofmethane from natural gases of various origins·Geochim etCosmochim Acta, 1980, 44 649-661.
4 Schole M, Genetic characterization of natural gases, AAPGBull. 1983, 67 2225-2238.
5 Stahl W,J Carbon and nitrogen isotopes in hydrocarbon re-search and exploration, Chemistry Geology, 1977, 20 121-149. -
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