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由于天然气与原油相比,可提供的指标和参数很少,因此对于气源的对比研究要比油源对比研究难度更大。目前,以天然气地球化学特征分析为基础,通过天然气与源岩气直接对比方法研究天然气来源是最为有效的一种方法。研究中岩石吸附烃的有效提取是气源对比的关键。但是现有的提取方法均存在一定不足,本文采用一种特制的新型岩石吸附烃提取装置进行徐家围子断陷沙河子组气源对比研究,取得了较好的效果。
Since natural gas provides fewer indicators and parameters compared to crude oil, it is more difficult to compare gas sources to oil source comparisons. At present, based on the analysis of natural gas geochemical characteristics, it is the most effective way to study the source of natural gas through the direct comparison between natural gas and source rock gas. In the study, the effective extraction of rock-adsorbed hydrocarbons is the key to gas source comparison. However, the existing extraction methods are not enough. In this paper, a new type of special adsorbed hydrocarbon extraction device is used to study the gas source of Shahezi Formation in the Xujiaweizi Fault Depression, which has achieved good results.