And then, underground coal porositycalculation method and variational characteristic of coal effective pore volume compressibility are discussed. 進(jìn)而探討了煤巖地下孔隙度的計算方法和煤巖有效孔隙體積壓縮系數的變化特征。
In dealing with reservoir rocks, it is necessary, because the cementing materials may seal off a part of the pore volume , to define total porosity and effective porosity. 在研究?jì)訋r石時(shí)，因為膠結物會(huì )堵住一部分孔隙的體積，所以對于油藏流體有必要定義總孔隙度和有效孔隙度。
