纯沥青质热解法研究辽河西部凹陷西斜坡重油序列的原油对比

The Correlation of Heavy Oils from Liaohe Oilfield by Means of Purified Asphaltene Pyrolysis

本文在划分辽河西斜坡重油主要类型的基础上,选择代表性样品,通过分离纯化其沥青质组分和分析纯沥青质热解产物进行原油对比,取得良好结果。数据表明辽河西斜坡重油序列样品为受生物降解程度不同的同源原油,S_4生油岩可能为油源岩之一。

The western depression of Liaohe Basin is one of the most prolific heavy oil-generating area in China. The analysis has shown that there are many kinds of heavy oils with different composition depending upon the degree of degradation. The present paper distinguishes the main types of heavy oils of the western depression and conducts correlation of differrent types of heavy oils by pyrolysis of purified asphaltenes. The results show that the heavy oils from the western slope of the western depression of Liaohe Oilfield are generated from the same source but subjected to different degrees of degradation (mainly biodegradation) .The pyrolysis of a S4 kerogen has shown the S4 formation may be one of the source rock for these heavy oils.