摘要
以韩城开发区高煤级煤储层为例,分析了该区煤储层生气地质条件、煤储层物性特征。研究结果表明,本区煤层气赋存条件良好,煤级高,生气能力大,勘探开发潜力大;煤储层物性条件良好,储集性能好;煤层内生裂隙发育,连通性较好,孔隙以微孔占据主导地位,孔径介于1～100nm的占总孔容71.44%～88.15%,孔隙度普遍小于7%;煤比表面积、孔容等孔隙参数表现出强烈的不均匀性;煤储层压力以欠压为主,局部存在高压储层,渗透率分布具有典型的非均质性;煤层吸附能力大,含气量较高。总体上,该区地质和储层特征参数有利于煤层气富集和高产。
Geological conditions for occurrence and generation of coalbed methane and physical properties of coal seam were analyzed using high rank coal reservoir in development zone of Haneheng as an example. The following conclusions were obtained. 1） There are good occurrence conditions for CBM in this area. Coal rank is high, gas generation is great,and the potential of ex- ploration and development is promising. 2） The physical characteristics of the coalbed is favora- ble with the optimal reservoir property. Endogenous fractures are developed, coal connectivity is preferable; micro-pore is dominant in coal pore, the percent of pore volume for pores from 1 to 100 nm is 71.44% to 88. 15% of total pore volume,and porosity is less than 70% Specific surface area and pore volume have strong nonuniformity, as well as other pore structures low pressure reservoir is dominant in reservoir pressure, with a local high pressure reservoir with the heterogeneous characteristics of permeability; the adsorption capacity of coal seam is high with the good gas quality. As a whole, the geological and reservoir parameters reveal that this area has favora- ble conditions for CBM enrichment and recovery.
出处
《太原理工大学学报》
CAS
北大核心
2012年第2期185-189,共5页
Journal of Taiyuan University of Technology
基金
国家科技重大专项:鄂尔多斯盆地石炭二叠系煤层气勘探开发示范工程(2009ZX05062)
关键词
韩城
煤层气
储层特征
裂隙
Hancheng
coalbed methane
reservoir feature
fracture
