Thermodynamic study on the compositions of fluid phases in the C-O-H system under high temperature and pressure

被引：0

作者：

Bai Z. ^{[1
]}

Wang X. ^{[2
]}

机构：

[1] Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou

[2] Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou

来源：

Chinese Journal of Geochemistry | 1998年 / 17卷 / 2期

基金：

中国国家自然科学基金;

关键词：

fluid phase; high temperature and high pressure; thermodynamics; nonbiogenesis; natural gas;

D O I：

10.1007/BF03166831

中图分类号：

学科分类号：

摘要：

Based on the fluid phase equilibrium and the C-O-H system, the compositions of carious fluid phases under high temperatures and pressures have been calculated in terms of the available thermodynamic data and new P-V-T data and on the assumption of PT = ΣPi in this paper. The results indicate that in this system there are 5 major fluid phases in different proportions at various T and P. CH4 is the dominant phase (about 70%) under relatively lower T and P. Its proportion obviously decreases with increasing T, P and fO2. The results provide sufficient theoretical grounds for discussing the possibility of CH4 formation and the physical-chemical conditions of its stable occurrence and proportion in the geological environment.

引用

页码：103 / 113

页数：10