水文地质分区及其控气作用——以鄂东气田保德区块为例

发布时间：2018-01-27 07:25

  本文关键词： 鄂东气田 保德 水文地质 分区 煤层气富集区 控气作用　出处：《中国矿业大学学报》2017年04期 　论文类型：期刊论文

【摘要】：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.
[Abstract]:In order to elucidate the control effect of hydrodynamics and hydrochemistry on the enrichment of coalbed methane, the hydrogeological characteristics of Baode block in East Hubei were studied. Hydrodynamic analysis, hydrochemical analysis and mathematical statistics were used. Based on the statistics of mass production dynamic monitoring data and laboratory hydrochemical test data, the hydrodynamic zoning, hydrochemical field quantitative characterization and hydrogeological gas control are analyzed. A hydrological evaluation index system for the optimal selection of coalbed methane rich areas was established and the hydrogeological zoning method was put forward. The mechanism of hydrogeological gas control and the method of selecting rich areas are selected. The results show that the hydrodynamic weak runoff area-stagnant flow zone is NaHCO-3 type, and the salinity is 1 500 mg / L. The superposition area of sodium-chlorine coefficient 1.7 and desulfurization coefficient 5 is a favorable area for coalbed methane enrichment, and two favorable areas for coal-bed methane enrichment are selected from class 鈪，

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