阜新盆地煤层气成因分析  

Genetic Analysis of Coal-Bed Methane in Fuxin Basin

作　　者：朱志敏[1] 沈冰[1] 崔洪庆[2] 周家云[1] 

机构地区：[1]中国地质科学院矿产综合利用研究所,成都610041 [2]辽宁工程技术大学资源与环境工程学院,辽宁阜新123000

出　　处：《地质科技情报》2007年第3期67-70,共4页Geological Science and Technology Information

基　　金：中国地质调查局地质调查项目(199910010311)

摘　　要：对阜新盆地煤层气成分、气体同位素和热演化特征的分析结果表明:气体组分中甲烷含量高,主要为干气;气体稳定碳同位素值δ(13C1)为-58.00‰^-44.70‰,气体较轻;煤的镜质体反射率为0.42%~1.67%,热演化程度较低。另外,盆地在孙家湾期整体隆升,地下水以地表降水渗入为主,早期生成的原生生物气生成量有限且大多散失,考虑到成煤后两期岩浆活动,现今保存的煤层气为次生生物-热解混合成因煤层气,盆地煤层气的进一步勘探开发应针对此类混合成因煤层气进行。To guide the coal-bed methane exploration, it is necessary to confirm the genetic type of coal-bed methane. The study of the composition, isotope and evolution characteristics of coal-bed methane in Fuxin Basin reveals that the content of methane is high, and the gas is dry gas. While δ（^13C1） of coal-bed methane varies from -58.00‰ to -44.70‰ and the Ro of coal ranges from 0.42% to 1.67%. In addition, the basin uplift took place in Sunjiawan episode and the underground water is recharged mainly by meteoric water and the magmation lead to the gas-generation of coal. As a result, the primary biogenetic gas is very little or escaped and the coal-bed methane is secondary biogenetic-pyrogenation. It is suggested that this secondary biogenetic-pyrogenation coal-bed methane should be the target for the furture exploration.

关 键 词：煤层气 次生生物-热解混合成因气 阜新盆地 

分 类 号：TE122.1[石油与天然气工程—油气勘探]