摘要
干酪根是由千差万别的原始有机物质经过生化作用和物化作用改造而成,它们彼此之间的化学组成、内部结构、形状及大小各不相同。对于干酪根类型的划分,目前存在很多方法,如三分法、四分法、五分法和"X"图解等,最常用的是Tissot的三分法。虽然有这么多的分类方法,但是无法对干酪根类型进行准确定量分析。因此,在四型分类法的基础上提出了新的定量分析方法。拟合"Van Kerevenlen"图版上4种类型曲线方程,然后计算目标点到4种类型曲线的距离,从而确定干酪根类型(到哪条曲线的距离值最小,目标点就属于该型的干酪根)。采用新建立的干酪根生烃潜力指数确定干酪根的生烃潜力。通过对比分析干酪根类型和生烃潜力的计算结果,研究发现,新建立数值化方法的结果和生烃潜力计算结果基本吻合,说明新的数值化类型确定方法是正确的、可靠的。并且具有计算速度快、精度高、计算范围大、计算机操作方便等多方面的特点。
Kerogen is substances in common organic solve vastly different biochemi have internal structure, s nt ca sedimentary rock that is neither s solid organic substances. It is compose 1 effects and role of transformation from soluble in alkaline d of the original or aqueous gamc ma the physical, chemical hape, size varies. For the division of kerogen types, there are now solvents nor tter that are composition, they a lot of methods, such as three types,four types,five types, and ＂X＂ diagrams,etc. The most commonly used is the Tissot three types. Although there are so many classification methods, but it cannot be accurately kerogen quantitative analysis. Therefore, based on four types, this paper proposed new method for quantitative analysis. With ＂Van Kerevenlen＂ plate,curve equation will can be got four types curves,and then calculate the target point to the distance of four types of curves to determine the type of kerogen （where the value of the minimum distance curve, the target point belongs to this type of kerogen）. And then, with new formula, the Hydrocarbon potential of source rock is gotten. By comparing the results,it is found that the result of new numerical method agree with the result of the hydrocarbon generation potential, and the numerical method for determining the type is correct and reliable. And it has many characteristics, such as fast calculation speed, high precision calculation range, easy to operate computers and so on.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2014年第6期898-905,共8页
Natural Gas Geoscience
基金
中国科学院知识创新工程重要方向项目(编号:KZCX2-EW-104)
中国科学院西部行动计划项目(编号:KZCX2-XB3-12)联合资助
