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为了阐明水动力及水化学对煤层气富集的控制作用,对鄂东保德区块的水文地质特征进行研究.采用水动力学分析、水化学分析及数理统计等方法,优选煤层气富集有利区.通过大量生产动态监测数据及实验室水化学测试数据的统计,分析了水动力分区、水化学场定量表征及水文地质控气作用,建立煤层气富集区优选的水文评价指标体系,提出了用形成的水文地质分区方法、水文地质控气作用机理及选区方法开展富集区优选.研究结果表明:水动力弱径流区-滞流区、NaHCO_3型、矿化度>1 500mg/L、钠氯系数<1.7、脱硫系数<5的叠合区域是煤层气富集的有利区,优选出Ⅰ类区及Ⅱ类区2个煤层气富集有利区,对于保德及相似地质条件区块的后续的勘探开发具有重要的借鉴意义.
In order to clarify the hydrodynamic and hydrochemistry control effects on CBM enrichment, the hydrogeological features of the Baode block in eastern Hubei Province are studied. Hydrodynamic analysis, hydrochemical analysis and mathematical statistics are used to optimize the CBM enrichment Favorable zone.According to the statistics of mass production dynamic monitoring data and laboratory hydrochemistry test data, the hydrodynamic zoning, quantitative characterization of hydrous chemical field and hydrogeological controlling action are analyzed, and the optimal hydrological evaluation index system of CBM- The results show that the hydrodynamic weak runoff zone - stagnant zone, NaHCO 3 type, salinity> 1500 mg / L , The synergistic region where the sodium-chlorine coefficient is less than 1.7 and the desulfurization coefficient is less than 5 is a favorable area for CBM enrichment, and two CBM-rich favorable areas are preferred for Class I and II, and for Baode and similar geological conditions Subsequent exploration and development of block has important reference significance.