塔里木盆地和田河气田天然气地球化学研究  

Natural gas geochemical study of the Hetianhe gas field in Tarim basin

作　　者：唐小强[1] 尹玉川[1] 李晓辉[1] 祝洪爽[1] 姚普勇[1] 

机构地区：[1]吐哈油田公司工程技术研究院,新疆鄯善838202

出　　处：《中国地质》2011年第4期1025-1031,共7页Geology in China

基　　金：国家"十五"重点科技攻关项目(2004BA616A02-01-01-03)资助

摘　　要：本文就和田河气田天然气组分组成、碳同位素组成和天然气成因类型进行了分析,着重分析了其东西部差异。研究发现:和田河气田天然气甲烷含量很高,达64.19%～86.86%,平均含量79.36%,C2+含量0～3.75%,干燥系数为95.52～99.4,平均值为97.34,CO2含量高。和田河气田东西部天然气差异明显,其主要表现为多期成藏、TSR反应东西运移的结果。天然气的成因分别是东部为原油裂解气,玛2井为原油裂解气和干酪根裂解气混合气,西部为干酪根裂解气。This paper has analyzed the natural gas components,carbon isotope composition and natural gas genetic types of the Hetianhe gas field,with the emphasis placed on the differences between the eastern part and the western part.Studies show that methane content of the natural gas is extremely high,mainly in the range of 64.19%～86.86%,being 79.36% on average;C2＋ content is 0～3.75%;the dry coefficients vary in the range of 95.52～99.4,97.34 on average;CO2 content is high.There exists remarkable difference in natural gas conditions between the eastern part and the western part,resulting mainly from multi-period accumulation,reaction of TSR and westward migration.As for the genesis of the natural gas,there are oil-cracked gases in the eastern part,with the Ma 2 well being mixed gases of the oil-cracked gases and the kerogen-cracked gases,whereas kerogen-gases are dominant in the western part.

关 键 词：组成 东西部差异 成因类型 原油裂解气 干酪根裂解气 

分 类 号：P618.13[天文地球—矿床学]