现代地质Issue(3)：645-652,8.
沁水盆地南部煤中矿物赋存特征及其对煤储层物性的影响
Occurrence Characteristics of Minerals and Their Influences on Physical Properties of Coal Reservoirs in Southern Qinshui Basin
摘要
Abstract
Minerals in coal can influence coal reservoir physical properties and the development of coalbed methane.Mineral species,content and occurrence characteristics in coal of southern Qinshui Basin were studied by using optical microscope and scanning electron microscope (SEM).Based on the test of isothermal adsorp-tion experiment and mercury-injection method,the effects of minerals on adsorption capacity,porosity and per-meability of coal reservoir were analyzed.The results show that the mineral content of No.3 and No.15 coal seams of Shizhuang block are 10.68%and 12.81%,respectively,and the content of sulfide minerals in No.15 coal seam is higher than that in No.3 coal seam.Calcite,pyrite,kaolinite and quartz filling in cell pores,in-tergranular pores and microfractures can be identified under SEM.The values of langmuir volume,proportion of macropores and mesopores,porosity and permeability decrease with the increasing of ash content,indicating that minerals in coal can decrease the adsorption capacity,porosity and permeability of coal reservoirs.Minerals in coal mainly fill in macropores,mesopores and microfractures of coal and they can influence the diffusion of coalbed methane in cleats and fractures,causing the decrease of porosity and permeability.However,a small part of clay minerals which fill in micropores of coal reservoir can lead to the decrease of adsorption capacity.关键词
煤中矿物/赋存特征/煤储层/物性/矿物充填/沁水盆地Key words
mineral in coal/occurrence characteristic/coal reservoir/physical property/mineral filling/Qin-shui Basin分类
天文与地球科学引用本文复制引用
刘贝,黄文辉,敖卫华,张守仁,吴见,许启鲁,滕娟..沁水盆地南部煤中矿物赋存特征及其对煤储层物性的影响[J].现代地质,2014,(3):645-652,8.基金项目
国家科技重大专项项目（2011ZX05042-001-002）；国家重点基础研究发展规划项目（2014CB238900）；中央高校基本科研业务费专项资金项目（2652011266）。 （）
