西北低煤阶盆地生物成因煤层气成藏模拟研究  

STUDY ON SIMULATION OF BIOGENIC COALBED METHANE IN THE LOW COAL RANK BASINS IN NORTHWESTERN CHINA

作　　者：刘洪林[1] 李贵中[1] 王红岩[1] 杨泳[1] 王勃[1] 刘萍[1] 

机构地区：[1]中国石油天然气股份有限公司勘探开发科学研究院廊坊分院,河北廊坊065007

出　　处：《石油实验地质》2006年第6期600-603,共4页Petroleum Geology & Experiment

基　　金：国家973煤层气项目(2002CB211705)

摘　　要：在美国粉河、澳大利亚苏拉特等低煤阶盆地煤层气勘探取得突破以前,一直认为具有商业价值的煤层气资源主要存在于中煤阶的煤层中,煤阶太低,一般含气量不高,不具有勘探价值。但是近几年来的发现证实,低煤阶盆地煤层厚度大,渗透率高,资源丰度大,含气饱和度高,同样可获得商业性气流,而且从其气体的成因来看,其中有很大一部分是生物成因的煤层气。利用煤层气成藏模拟装置对低煤阶含煤盆地的煤岩样品开展成藏模拟,从实验角度证明了中国西北地区虽然煤层煤阶较低,热成因气较少,但是却存在着具有商业价值的二次生物成因的甲烷气,再加上含煤层系众多,煤层厚度大,资源丰度极高,仍具有巨大的勘探潜力。During the past time, people thought that commercial coalbed methane gas existed in medium to high coal rank and the low rank coal was not worthy exploring for low gas content. But the cognition has changed now. Some coalbed methane gas fields were found in low coal rank basin such as Powder River Basin in America and Surat Basin in Australia. In these basins, the coal bed thickness is high and gas saturation is also high, thus being favorable to coalbed methane enriching. From the genesis of the coalbed methane in these basins, we can find that most of the coalbed methane was biogenic. In this paper, the authors have carried out coalbed methane enrichment experiment using low coal rank samples from Northwestern China. Experiment results testified that commercial biogenic gas possibly exist in the northwestern coal basins and it was favorable to exploring for high thickness and high resource concentration.

关 键 词：煤层气 水动力 成藏 准噶尔盆地 

分 类 号：TE132.2[石油与天然气工程—油气勘探]