从生烃角度分析排烃效率的影响因素

Analysis on Factors Affecting the Hydrocarbon Expulsion Efficiency From the Perspective of Hydrocarbon Generation

烃源岩生烃对排烃效率有着重要的影响,其影响因素主要可以分为有机质的丰度、有机质的类型、有机质的成熟度三个方面。通过研究松辽盆地北部齐家古龙凹陷青山口组各类型有机质的原始生烃潜力,并计算古12井和英16井的排烃效率,分析其有机质丰度、有机质类型、有机质成熟度对排烃效率的影响,得出以下结论:有机质丰度越好,排烃效率越高,当TOC>2%时,排烃效率变化不明显;有机质类型越好,排烃效率越高;有机质成熟度越高,排烃效率越高。

The hydrocarbon generation of source rocks has a significant influence to the expulsion efficiency. The influence factors can be divided into three aspects： the abundance of organic matter, organic matter type and the maturity of organic matter. The expulsion efficiencies of Gu 12 and Gu 16 wells of Qijiagulong depression in Northern Songliao Basin were calculated by studying the original hydrocarbon potential of various types of organic matter of Qingshankou formation. The influence of the abundance of organic matter, organic matter type and the maturity of organic matter to the expulsion efficiency was analyzed. The results show that, the better the abundance of organic matter, the higher the expulsion efficiency; When TOC 2%, the expulsion efficiency change is not significant; The better the type of organic matter, the higher the expulsion efficiency; The higher the maturity of organic matter,the higher the expulsion efficiency.