宿州区块煤层气富集的水动力条件控制作用  

The Control Effect of Hydrodynamic Conditions on CBM Enrichment in Suzhou Block

作　　者：黄亮[1] 陈松 

机构地区：[1]中联煤层气有限责任公司,北京 [2]宿州学院资源与土木工程学院,安徽 宿州

出　　处：《自然科学》2024年第4期694-702,共9页Open Journal of Nature Science

摘　　要：为分析宿州区块水动力条件对煤层气富集的控制作用,以宿州区块煤储层为研究对象,结合主要含水层水位观测数据,分析了各含水层水动力场分布特征,讨论了水动力场对煤层气富集的影响。结果表明:四含水动力由南向北逐渐降低,太灰水动力由东南向西北以及由西南向东北逐渐降低,滞流区均位于西南部祁南煤矿。奥灰水动力总体由东向西以及由东北向西南逐渐降低,滞流区位于东部芦岭煤矿。四含和太灰地下水流场与8煤含气量的分布规律具有对应关系。北部处于地下水排泄区,水动力活跃,导致区域含气量偏低,祁南煤矿深部四含及太灰水动力较弱,煤层气含量较高。In order to analyze the control effect of hydrodynamic conditions on CBM enrichment in Suzhou block, the coal reservoir in Suzhou block was taken as the research object. Combined with the water level observation data of main aquifers, the distribution characteristics of hydrodynamic field in each aquifer were analyzed, and the influence of hydrodynamic field on CBM enrichment was discussed. The results show that the hydrodynamic force of the fourth aquifer gradually decreases from south to north, the hydrodynamic force of the Taiyuan formation limestone aquifer gradually decreases from southeast to northwest and from southwest to northeast, and the stagnation zone is located in the Qinan coal mine in the southwest. The hydrodynamic force of the Ordovician limestone aquifer gradually decreases from east to west and from northeast to southwest, and the stagnation zone is located in the Luling coal mine in the eastern. There is a corresponding relationship between the groundwater flow field of the fourth and the limestone aquifer and the distribution law of the CBM content of No.8 coal. The northern is in the groundwater discharge area, and the hydrodynamic force is active, which leads to the low gas content in the area. The hydrodynamic force of the fourth and the Taiyuan formation limestone aquifer in the deep-seated place of the Qinan coal mine is weak, and the CBM content is higher.

关 键 词：煤层气 水动力场 地下含水系统 含气量 宿州区块 

分 类 号：P61[天文地球—矿床学]