评价天然气成熟度及运移的新方法

A New Method of Evaluation of Maturity and Migration of Natural Gas With Geochcmical Multiparameters

李西爱¹,李银花²,许　杰²,田东恩¹,刘合义¹

Li Xi’ai,Li Yinhua, Xu Jie, et al

1. 中原油田分公司试采二处,2. 中原油田分公司勘探开发科学研究院

The Second Department of Oil Testing Division , Zhongyuan Oilf ield Company , SINOPEC, Henan 457001 , P. R. China

为了提高综合评价天然气藏的成熟度、聚集效率及运移分馏结果,更全面反映气藏性质,有针对性提出气藏勘探方案。Alain Prinzhofer 提出的应用天然气C1 - 4组份及同位素比值等11 项天然气地化参数与天然气藏上述各属性间的相关性,并用盖斯塔图表达了它们之间的关系,对某多层油田天然气样品作盖斯塔图,进行气藏成熟度、聚集效率及运移分馏分析,从而评价圈闭的封闭程度。

Geochemical multiparameters of showing natural gas chemical proportions from methane to normal-butane and all the C1C4carbon isotopic ratios are used as a new method to evaluate maturity , accumulation efficiency and segregative migration of gas pools. The correlation between 11 geochimecal parameters and three characterizations of a gas pool mentioned above was expounded . Gastar Diagram is used to illustrate this correlation. An analysis of a multilayered field on maturity , accumulative efficiency and segregative migration using Gastar Diagram shows that this method can be used to reconstructure gas history , and providing guide to look for new gas pools.