储层含油气性罐装样轻烃评价方法

Evaluation Methods of Oil-bearing Reservoirs by Light Hydrocarbons Samples from Cuttings in Cans

在对某盆地５０００多个罐装样轻烃样品进行分析、总结，并与试油、测井等资料对比的基础上，提出了一些用于判断含油气显示的轻烃指标。这些指标分为两类：一类是浓度指标，如∑（Ｃ１～Ｃ７）等轻烃含量指标，用于区分油气显示与非油气显示；另一类是相对比值指标，如（Ｃ５～Ｃ７）／（Ｃ１～Ｃ４），ｉＣ４／ｎＣ４，ＭＣＨＩ等，用于区分油显示与气显示。据此建立了该盆地储层含油气性罐装样轻烃评价标准。

More than 5 000 light hydrocarbon samples from cuttings in cans have been analysed. Some indices applicable to judge oil or non-oil indication are proposed based on the light hydrocarbons (C1￣C7) / (C1￣C4),iC4/nC4,PI2 and so on. An evaluation criterion of light hydrocarbons for oil-bearing reservoirs is established according to these indices.