郑庄井田3号煤层煤层气成藏条件研究

Study on No.3 Coal Seam Coalbed Methane Accumulation Conditions in Zhengzhuang Field

煤层气成藏条件是煤层气高产富集区预测及评价的重要研究内容之一,文章采用煤层气地质理论,对郑庄井田3号煤层煤层气成藏条件进行了研究。结果表明:煤中丰富的生烃物质和良好的生烃动力,为煤层气生成提供了保障;煤中储集煤层气的空间发育,储气能力强、储气量大、储集动能良好,为煤层气储集提供了利好条件;一定厚度低渗围岩、封闭型构造发育及地下水径流差,为煤层气提供了良好的封闭保存条件。

Coalbed methane reservoir forming conditions are one of the important research contents for the prediction and evaluation of high yield and rich area of coalbed methane. The results shows that the abundant hydrocarbon generation materials and good hydrocarbon generation power in coal provide guarantee for the generation of CBM. The space of coalbed methane storage in coal is developed, with strong gas storage capacity, large gas storage capacity and good kinetic energy, which provides favorable conditions for coalbed methane storage. The low permeability surrounding rock of certain thickness, the development of closed structure and the difference of groundwater runoff provide good conditions for the sealing and preservation of CBM.