School of Energy Resources,China University of Geosciences (Beijing)

基于X射线层析扫描(X-CT)技术,通过表征不同煤岩类型煤储层的孔-裂隙和矿物的发育特征,分析煤岩组构,建立煤岩体可视化与三维重构,对沁水盆地南部3号和15号煤层储层特征行了精细描述。结果表明:扫描CT数在不同煤岩类型的样品中呈现较大差异,孔裂隙及矿物发育呈现出较好的规律性;切片平均CT孔隙度及矿物含量均与切片平均CT数有良好相关性。对比这2个煤层的X-CT试验结果,发现3号煤层平均CT数小于15号煤层,说明3号煤层中无机组分含量较低,孔裂隙较为发育,而15号煤层中存在相对多的无机矿物质;3号煤层CT数的极差、标准差和变异系数均大于15号煤层,说明3号煤层的层内非均质性较15号煤层强。

based on the X. T tfechmology withe characercaton on the devlopment features of the pore cacks and mineral in th diferet tholypecoal esevorthecoalfabrit was analyes th coal and rckrmass vsealraton and lDreonstoutionwere estabisted an a ime desciption was conducted on No.3 se am and No.15 sam in outhen ishui Besin .The rsuts showe thatin th .ififrentlt otype samples the CT numter would edfifrentan thedvelopmentofthe porecracks and mineral woud ave a god aw.The average Ci porosiy andthemineal onlemn of th fises wouid have agood corelaton to the average CT umte ofthe slcs /n corelato wththe X.CTexperiment result f the to seans the average CT numver of No. 3 seam woud b less then No.15 seam.Thereore th inocganc comporentconent ofN .3 scam was low and the pore cacks were el eveloye d An threwererelativly hgh inoganm: minerals cxistd in No.15 seam. The CT number of N 3 sam was vey por and th standard devialion an thevaraton c ricent would al e hger thnANb.‘'5 scanm.The aboveshowed ththe iniemogeneity in No. 3 seam was higher than No.15 seam.

国家自然科学基金重点资助项目(41530314)；国家自然科学基金面上资助项目(41272175)；高等学校博士学科点专项科研基金资助项目(20130022110010)；