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.
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 （δ^13C-Ro relationship formula of gas components and δ^13 C1 - 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.
出处
《中国海上油气（工程）》
2005年第5期297-302,共6页
China Offshore Oil and Gas
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
关键词
天然气
碳同位素动力学
成熟度评价
烃源岩
natural gas
carbon isotope kinetics
maturity evaluation
source rock
