论低熟油烃产率模型

STUDY ON THE HYDROCARBON PRODUCTION RATE MODEL OF LOW-MATURE OIL

林玉祥

Lin Yuxiang

北京大学地质学系, 北京 100871

Department of Geology, Beijing University, Beijing 100871, China

该文结合低熟油成因研究、模拟实验成果及有机质自然演化剖面,指出了低熟油实际上是有机质成岩演化的副产物.在成岩作用阶段随成熟度增加,低熟油的产率及累积产率一般没有先增后减的生烃(或生油)高峰,这与有机质深成阶段干酪根生烃(油)模式存在根本的区别.低熟油烃产率和累积烃产率主要取决于原始母质中的原生烃类含量、干酪根形成过程中对烃类的捕集作用、部分地质大分子的低温分解以及岩石矿物成分等因素.文中对流行的低熟油生烃(油)模式进行了补充和修改.

Based on the genetic study of low-mature oil,the results of simulation experiments and the natural evolutionary profiles of organic matter,it is pointed out that low-mature oil is in fact a by-product during the diagenetic evolution of organic matter.In the diagenetic stage,the production rate and cumulative production rate of low-mature oil generally have on hydrocarbon-generating (or oil-generating) peaks with the increase of maturity.This is distinct from the hydrocarbon-generating (oil-generating) pattern of kerogen in the plutonic stage of organic matter.The hydrocarbon production rate and cumulative production rate of low-mature oil mainly depend on the original hydrocarbon content in primary mother material,the hydrocarbon trapping during the formation of kerogen,the low-temperature decomposition of part large geologic moleculars,the components of rock mineral and other factors.In this paper,the popular hydrocarbon-generating (oil-generating) patterns of low-mature oil are supplemented and modified.

https://doi.org/10.11781/sysydz200101087