论文详情

影响烃源岩中分散液态烃滞留数量因素研究

石油实验地质

2010年 32卷第6期

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Title

SIMULATION OF INFLUENTIAL FACTORS OF DISPERSIVE RESOLUBLE ORGANIC MATERIALS RESIDENT IN SOURCE ROCKS

作者

李永新王红军王兆云

Authors

Li Yongxin Wang Hongjun Wang Zhaoyun

单位

中国石油勘探开发研究院, 北京, 100083

Organization

Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China

摘要

采用加水热模拟方法,对低丰度海相泥灰岩进行了不同压力条件下的生排烃模拟。结果表明,10MPa压力条件下,烃源岩在310℃左右达到生、排烃高峰,排出油产率和总产油率最大值分别为182.5,193.4mg/g;20MPa压力条件下,烃源岩生、排烃高峰对应的温度为330℃,排出油产率和总产油率峰值分别为92.1,111.4mg/g。对比显示,压力增加抑制了有机质的生烃作用,导致烃源岩的有效排烃期增长,主排烃期延迟,使得更多的液态烃滞留于烃源岩中,为高演化阶段天然气的生成提供了重要母质来源。

Abstract

The simulations of marine marl with low organic matter abundance under different fluid pressures were carried out. The results indicated that, the peak time of hydrocarbon generation and expulsion was around 310℃ under the pressure of 10 MPa, with the expulsive oil rate and the total oil yielding rate of 182.5 and 193.4 mg/g, respectively. Under 20 MPa, the temperature corresponding to the hydrocarbon generation and expulsion peak was about 330℃, with the expulsive oil rate and the total oil yielding rate of 92.4 and 111.4 mg/g, respectively. It has been suggested that, the increase of pressure represses the thermal evolution of organic materials. It enlarges the effective hydrocarbon expulsion stage of source rocks in addition to postponing the major expulsion period. As a result, the residence time of resoluble organic materials with large quantity has been enlarged, which provides material basis for the generation of gas during the high evolutionary phase.

关键词：

低丰度泥灰岩; 滞留烃; 迟滞作用; 压力变化; 加水热模拟;

Keywords:

marine marl with low abundance; occluded hydrocarbon; retardation; pressure variation; hydrous pyrolysis simulation experiments;

基金项目

国家基础研究发展计划(973计划)项目(2007CB209504)资助

DOI

https://doi.org/10.11781/sysydz201006588