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评价天然气成熟度的碳同位素动力学方法探讨

A discussion on the evaluation method of gas maturity using carbon isotope kinetics

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【Author】 Li Xianqing~(1,2)Xiao Xianming~3Tang Yongchun~4Mi Jingkui~3 Tian Hui~3 Xiao Zhongyao~5Liu Dehan~3 Shen Jiagui~3(1.Key Laboratory of Coal Resources,Ministry of Education,China University of Mining and Technology,Beijing,100083;2.The Department of Resources and Earth Sciences,China University of Mining and Technology,Beijing,100083;3.State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou,510640;4.Research Center of Petroleum Energy and Environment,California Institute of Technology,California,91789;5.The Research Institute of Exploration and Development,Tarim Oil Field Company,PetroChina,Xinjiang,841000)

【机构】中国矿业大学(北京)煤炭资源教育部重点实验室；中国科学院广州地球化学研究所有机地球化学国家重点实验室；美国加州理工学院石油能源与环境研究中心；中国石油塔里木油田分公司勘探开发研究院；中国科学院广州地球化学研究所有机地球化学国家重点实验室中国矿业大学(北京)资源与地球科学系；

【摘要】天然气成熟度评价是天然气藏气源对比和成因研究的重要内容。塔里木盆地克拉2气田的实例显示,两种常规方法(天然气组分δ13C-Ro关系式、典型烃源岩热模拟δ13C1-Ro关系图版)所确定的天然气成熟度结果差别较大,表明常规方法具有明显的局限性。结合地质条件,应用碳同位素动力学方法评价克拉2气田天然气成熟度Ro值为1.3%~2.5%,这一结果不仅与地质实际较为吻合,而且也得到相关研究成果的支持。更多还原

【Abstract】 The maturity evaluation is an important aspect in gas source correlations and origin studies.A case study of Kela-2 gasfield in Tarim basin shows that the gas maturity results determined by two routine evalution methods(δ¹³C-Ro relationship formula of gas components and δ¹³C₁-Ro relationship plate from pyrolysis experiment on typical source rock) are quite diffent,indicating obvious limitation of these methods.Combined with the geological conditions in the study area,a method of carbon isotope kinetics is used,and the gas maturity in Kela-2 gasfield is determined as Ro from （1.3）% to 2.5%.The results are not onty consistent with the actual geology,but also are supported by other studies.更多还原

【关键词】天然气；碳同位素动力学；成熟度评价；烃源岩；
【Key words】 natural gas； carbon isotope kinetics； maturity evaluation； source rock；

【基金】国家“十五”重点科技攻关项目(2001BA605A02-03-01和2004BA616A02-01-01-04);中国博士后科学基金(2002031282);国家自然科学基金(40072043)资助

【文献出处】中国海上油气 ,China offshore Oil and Gas , 编辑部邮箱 ,2005年05期

【分类号】P618.13;
【被引频次】7
【下载频次】547

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