【摘要】 在利用地球化学录井资料进行油层产液性质评价过程中,如何准确地对烃类损失进行恢复是一个非常关键的环节。由于引起烃类损失的因素众多,而实际工作中岩心分析资料常常缺乏或者与其他分析资料不配套,从而造成恢复系数的确定异常困难。针对这一问题,提出了一种全新的研究思路和相应的恢复方法———临界点分析法,它首先利用烃类组分含量与轻重组分含量比值之间关系图,确定出含有可动油层与不含可动油层之间的临界点,进而通过不同类型分析样品临界点热解参数值的对比来确定恢复系数。该方法不仅从理论上可以得到科学的解释,而且在实际中应用取得了较好的效果。更多还原

【Abstract】 How to accurately recover the losing hydrocarbon by pyrolysis geochemistry logging is a crucial step for reservoir fluid-producing evaluation. It is very difficult to determine the recovering coefficients due to lack or less integrity of data in real core analysis. For dealing with this problem, a new method called critical point analysis is proposed in this paper. It can be used to find the critical point by drawing the scatter plot of hydrocarbon composition content versus the ratio of the light/weight hydrocarbon composition contents, and then to calculate the recovering coefficient by contrasting the pyrolysis parameters of critical point for different types of fluid samples. This method can be not only explained reasonably in terms of theory, but also be reliable for practical application.更多还原