天荣矿二2煤储层物性及特征

煤储层物性及特征是煤层气地质理论的重要内容，加强其研究对提高煤层气勘探开发成效至关重要。基于天荣矿地质、煤层气勘探及相关测试等资料，采用地质与煤层气地质理论对该矿二₂煤储层物性及特征进行了研究。结果表明:天荣矿二₂煤层物理性质良好，生烃物质丰富；煤层含煤性、稳定性、可采性好，煤层气含量和纯度高，可为煤层气开发提供良好对象和气源条件；煤变质程度高，煤中裂隙相对发育，但其渗透性整体较差，渗透率分异显著且普遍低下；煤储层能量较强且分异显著，煤储层压力状态为欠压—超压型，并以正常—超压煤储层压力状态为主，有利于煤层气高产富集。

Physical properties and characteristics of the Ⅱ2 coal reservoir in Tianrong Mine

The physical properties and characteristics of coal reservoirs are an important part of coalbed methane geological theory.Strengthening its research is essential to improve the effectiveness of coalbed methane exploration and development.It was based on the Tianrong Mine geology，coalbed methane exploration and related testing data，the physical properties and characteristics of the mine′s Ⅱ₂ coal reservoir were studied using geological and coalbed methane geological theories.The results showed that the Ⅱ₂ coal seam of Tianrong Mine had good physical properties and rich hydrocarbon-generating materials；the coal seam had good coal content，stability，and mineability，and high CBM content and purity，which could provide good targets and gas sources for CBM development conditions；the coal had a high degree of metamorphism and relatively developed fractures in the coal，but its permeability was poor overall and the permeability was significantly and generally low；the coal reservoir had strong energy and significant differentiation，and the pressure state of the coal reservoir was underpressure-overpressure，type was mainly based on the normal-overpressure coal reservoir pressure state，which was conducive to high-yield enrichment of coalbed methane.