摘要
吐哈盆地是一个富煤盆地 ,主要在侏罗系发育八道湾组和西山窑组两套含煤层系 ,八道湾组煤层主要发育在盆地的西部和中部 ,西山窑组煤层主要发育在盆地的中部和东部 ,大部分地区煤层发育层数多 ,厚度大(单层最大厚度 14 7m)。浅埋区的煤层主要为褐煤和长焰煤 ,煤的Langmuir压力较高 (4 .96～ 2 2 .6 2m3 /t)。在许多石油钻井中煤层的气测显示活跃 ,气体的主要组分是甲烷 ,证实了煤层气的大量存在。吐哈盆地具有勘探开发煤层气的广阔前景 ,卡拉图地区、托克逊凹陷南部艾 1井 -鲁南 1井区和沙尔湖地区煤层气富集条件好 ,地理位置优越 ,是吐哈盆地煤层气勘探开发的有利区。
Tulufan-Hami Basin is rich in coal resources and there are two coal measures, i.e. Badaowan Formation and Xishanyao Formation, Jurassic, in the basin. The former is mainly found out in the central and west parts of the basin and the latter in the central and east parts. The coal seams are multiplayer with a large thickness(the maximum single layer thick is up to 147 m). The coal seams in shallowly buried areas are mainly lignitic coals and kennel coals. Langmuir pressures of the coals are relatively high(4.96 ~ 22.62 m 3/t). The shows of gas logging against the coal seams are obvious in most of the boreholes drilled for oil, and the gas is mainly composed of methane, thus verifying the existence of a large amount of coalbed methane. Therefore a vast range of prospects for caolbed methane exploration and development will be opened up in Tuha(short for Tulufan-Hami) Basin. Kalatu region , well Ai 1 ~ well Lunan 1 in the south part of Tuokexun Sag and Sha’erhu region are the beneficial areas for the coalbed methane exploration and development in the basin because of their excellent geological conditions of enriching coalbed methane and the advantageously geographical positions.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2004年第2期8-11,共4页
Natural Gas Industry
关键词
吐哈盆地
煤层气
地质条件
构造特征
煤质特征
勘探开发
Tuha Basin, Coal bed, Coalbed gas, Enrichment, Geological condition, Prospect, Beneficial area
