生物气形成过程中CH_4碳同位素变化规律的研究  

THE ALTERATION OF METHANE CARBON ISOTOPE IN BIOGAS GENERATION PROCESS

作　　者：钱贻伯[1] 连莉文[2] 陈文正 戚厚发[4] 关德师[4] 

机构地区：[1]农业部沼气科学研究所 [2]农业部重点开放厌氧微生物实验室 [3]四川省石油勘探开发研究院 [4]石油勘探开发科学研究院

出　　处：《石油学报》1998年第1期29-33,共5页Acta Petrolei Sinica

基　　金："八五"国家重点科技攻关项目

摘　　要：高盐沉积物生物气形成过程中，随着产气时间的增长和温度的升高，生成的ＣＨ４有着逐渐富集１２Ｃ的规律，有别于有机质热分解成气过程，热解成气是随时延长、温度升高而降解增强，形成的ＣＨ４则是逐渐富集１３Ｃ。海洋沉积物生成的ＣＨ４较盐湖沉积物生成的ＣＨ４略富１２Ｃ。During the process of biogasforming in the highsalty sediments, the methane enriches isotope12 C gradually with the rising in temperature and prologation in gasgenerating time. This result is different from the gasforming process of organic pyrolysis, in which the degradation of organic matter is strengthened with the rising in temperature and prolongation in gasforming time and the methane enriches isotope13C gradually. The methane generated from the sea sediments enriches more isotope12C than from the salty lake sediments.

关 键 词：碳同位素 生化CH4 天然气成因 生物气形成 

分 类 号：P618.130.1[天文地球—矿床学]