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彬长矿区水文地质特征及其对煤层气的控制作用
引用本文:田冲,汤达祯,周志军,陶树,陈晓智,宋从雷.彬长矿区水文地质特征及其对煤层气的控制作用[J].煤田地质与勘探,2012(1):43-46.
作者姓名:田冲  汤达祯  周志军  陶树  陈晓智  宋从雷
作者单位:中国地质大学能源学院;中海油监督监理技术公司
基金项目:国家科技重大专项课题(2008ZX05034-001);油气沉积地质教育部创新团队项目(IRT0864)
摘    要:对彬长矿区水文地质特征进行了详细的论述,结合煤层实测含气性特征,探讨了水文地质条件对该区煤层气成藏的控制作用。研究表明:研究区构造简单,延安组煤系含水层与其他含水层不具明显水力联系,有利于煤层气富集成藏,同时使得煤系含水层地下水补给只能来源于区外侧向径流补给;矿区划分为3个水动力强弱不同的区域:侧向径流补给区、弱径流区和相对滞流区,其中位于矿区东南部的相对滞流区,也是水势低洼带煤层气汇集区,有利于煤层的富集成藏。同时,东南部煤层的含气量最高,说明该区水文地质条件确实对煤层气成藏起着关键作用。

关 键 词:彬长矿区  煤层气  水文地质  成藏  控气

Hydrogeological characteristics and their control on coalbed methane in Binchang mining area
TIAN Chong,TANG Dazhen,ZHOU Zhijun,TAO Shu,CHEN Xiaozhi,SONG Conglei.Hydrogeological characteristics and their control on coalbed methane in Binchang mining area[J].Coal Geology & Exploration,2012(1):43-46.
Authors:TIAN Chong  TANG Dazhen  ZHOU Zhijun  TAO Shu  CHEN Xiaozhi  SONG Conglei
Affiliation:1(1.School of Energy Resources,China University of Geosciences,Beijing 100083,China; 2.Supervision and Technology Company,CNOOC,Tianjin 300011,China)
Abstract:Hydrogeological conditions are critical factors of coalbed methane accumulation,which play an impor-tant role in the migration and conservation of coalbed methane.This paper took a detailed discussion on the hy-drogeological characteristics in Binchang mining area.Combined with the characteristics of measured gas content,the methane enrichment controlled by hydrogeological conditions in the area was studied.The results show that the structure of the study area is simple and there’s no significant hydrodynamic contact between the aquifer in coal measure of Yan’an Formation and other aquifers,which is favorable to the accumulation of coalbed methane,and the groundwater replenishment of the coal strata can only come from the lateral provision of areas outside the study area.According to the hydrodynamic intensity the study area is divided into three parts: lateral runoff recharge area,runoff area and the relative stagnation area.The relative stagnation area located in the southeastern area is also the low-lying area of potential hydro-energy,which is favorable to the accumulation of coalbed methane.Meanwhile,the gas content of the southeastern coal bed is the highest,which indicates that hydrogeological conditions do play a key role in coalbed methane reservoirs.
Keywords:Binchang sector  coalbed methane  hydrogeology  reservoir  control gas
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