长平井田3号煤层气储层物性及特征研究

Physical Properties and Characteristics of No.3 Coalbed Methane Rreservoir in Changping Minefield

煤层气储层物性及特征是煤层气地质理论最重要的基础研究内容,影响着煤层气的开发条件和效果。基于长平井田地质、煤层气地质、煤层气勘探开发及测试资料,采用煤层气地质理论及数理分析方法,对井田内3号煤层气储层物性及特征进行了研究。结果表明:长平井田3号煤层具有良好的含煤性和含气性,是煤层气开发的良好对象和气源保障;煤层的孔裂隙破坏相对严重,煤的孔隙度低、透气性差,不利于煤层气高效渗流产出;煤储层能量弱、压力较低,属于低压煤储层;煤对甲烷具有较强的吸附能力和储集能力。

The physical properties and characteristics of coalbed methane reservoirs are the most important and basic research contents of coalbed methane geological theory,affecting the development conditions and effects of coalbed methane.Based on the geological,coalbed methane,coalbed methane exploration and development and test data of Changping Minefield,the coal seam gas geology theory and mathematical analysis method were used to study the physical properties and characteristics of No.3 coalbed methane reservoir in the mine field.The results show that the No.3 coal seam in Changping Minefield has good coal content and gas content,which is a good object and gas source guarantee for coalbed methane development;The pore fracture of coal seam is relatively serious damage,and the porosity of coal is low and the gas permeability is poor,which is not conducive to the efficient seepage of coalbed methane.Coal reservoirs have weak energy and low pressure,and belong to low-pressure coal reservoirs;coal has strong adsorption capacity and reservoir capacity for methane.