摘要
水文地质特征对煤层气的富集有很大的影响。从水化学类型和水动力条件方面分析了准噶尔盆地南缘硫磺沟地区水文地质特征,探讨了水文地质条件对该区低煤阶煤层气富集的控制作用。结果表明:研究区地表水水化学类型为HCO3·SO4–Ca·Na·Mg,地下水水化学类型主要为Cl·SO4–(K+Na)·Ca·Mg或者SO4·Cl–(K+Na)·Ca·Mg。研究区地下水受地形和地质构造的控制,地下水流向大致为由南向北,汇聚到研究区北部的向斜核部。在地下水水化学类型和水动力条件对煤层气富集影响分析的基础上,认为研究区北部的向斜核部有利于煤层气富集。
Hydrogeological conditions are one of the main controlling factors of the low-rank coalbed methane enrichment. The hydrogeological characteristics have been analyzed in Lihuanggou area of the south of Junggar basin based on hydrochemical types and hydrodynamic conditions.The effect of hydrogeological conditions on low-rank coalbed methane accumulation has been discussed.The results show that the hydrochemical type of surface water in the study area is HCO_3·SO_4^-Ca·Na·Mg, the hydrochemical type of groundwater is Cl·SO_4-（K＋Na）·Ca·Mg or SO_4·CI-（K＋ Na）·Ca·Mg. The groundwater flows roughly from south to north controlled by terrains and geological structures and gathers in the syncline core of the northern study area.The syncline core of the northern study area is the enrichment area of low-rank coalbed methane based on the hydrochemical types and hydrodynamic conditions.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2018年第1期61-65,共5页
Coal Geology & Exploration
基金
国家自然科学基金项目(41402134)~~
关键词
准噶尔盆地南缘
硫磺沟地区
水文地质特征
煤层气富集
south margin of Junggar basin
Liuhuanggou area
hydrogeological conditions
coalbed methane enrichment
