An Isotopic Geochemistry Approach on the Identi-fication of Gas Sources of Two Wells in Tarim Basin

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• 出版年：1996
• 作者：Shen Jianzhong；Li Zhenxi；Ji Meiying；Lou Hong
• 单位1：Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou
• 语种：中文
• 作者关键词：oil and natural gas genesis；isotopic composition；noble gas；chemical composition of gases；Tarim Basin
• 起始页：214
• 总页数：6
• 刊名：沉积学报
• 是否内版：否
• 刊频：季刊
• 创刊时间：1983
• 主办单位：沉积学会；中国科学院兰州地质研究所
• 主编：叶连俊
• 卷：14
• 期：增刊
• 期刊索取号：P371.066243

摘要

Plenty of geochemical analyses were carried out on natural gas, oil and condensate samplescollected from two wells in Tarim Basin and results were employed in interpreting their sources and distin-guishing one from the other. The chemical compositions of gases from the both wells showed that they are ofoilfied associated gas with a low dry coeffieient. Their carbon isotopic compositions might indicate a mixture ofgas sources, and the input of the mantle-derived materials was denied by the isotopic parameters of noble gas-es, such as ³He/⁴He and ⁴He/²⁰Ne ratios. The age of gases from these two wells was identified to be thePalaeozoic by the ⁴⁰Ar/³⁶Ar ratio.