CAJ | 학술논문

应用CT扫描系统对13个岩心连续进行扫描,并应用三维重建技术得到岩心的三维孔隙变化,在"孔群级"尺度上清楚地观察到岩心内部的孔隙变化和非均质特征.应用统计学方法,对不同截面上测量的孔隙度进行定量分析与表征.S138号岩心存在着明显的层理现象,非均质性严重,岩心孔隙度的标准偏差和不均匀系数较高,孔隙分布不均匀,分选性差.71号岩心截面内低孔隙区较多,高孔隙区较少,岩心的平均孔隙度较低.S35号岩心的平均孔隙度高,岩心比较均质,岩心孔隙度的标准偏差与不均匀系数最小,孔隙分布均匀,分选性好.
응용CT소묘계통대13개암심련속진행소묘,병응용삼유중건기술득도암심적삼유공극변화,재"공군급"척도상청초지관찰도암심내부적공극변화화비균질특정.응용통계학방법,대불동절면상측량적공극도진행정량분석여표정.S138호암심존재착명현적층리현상,비균질성엄중,암심공극도적표준편차화불균균계수교고,공극분포불균균,분선성차.71호암심절면내저공극구교다,고공극구교소,암심적평균공극도교저.S35호암심적평균공극도고,암심비교균질,암심공극도적표준편차여불균균계수최소,공극분포균균,분선성호.
The porosity distributions at different section of thirteen sandstone cores were studied by using the X-ray CT scanning sys-tem. The 3-D distributions of the core porosity were determined with the 3-D reconstruction technique. The porosity distributions and heterogeneity of those cores were observed clearly in the level of "pore group". The observed porosities at different section were analyzed and characterized quantitatively with the statistics method. Three scanned cores were taken as the example to show the po-rosity distributions. The obvious stratification phenomena exist in the S138 core, and the heterogeneity is serious. The standard de-viation and nonuniform coefficient are great. The porosity distribution is uneven, and the pore sorting is bad. There are more low-porosity areas and less high-porosity areas in each section of the No. 71 core, and the average porosity of the core is lower. There are more high-porosity areas and local low-porosity areas at each section of the S35 core. The average porosity of this core is high, and the core is homogenous. The standard deviation and nonuniform coefficient are lowest, and the pore distribution is uniform. The pore sorting of this core is good.