本文将石灰石作为一种多孔材料，利用双收声波测井曲线计算出不同亚段石灰岩孔隙度值，再通过液氮吸附法结合X射线衍射对其纳米级孔径分布进行了深入研究。测试结果表明不同亚段石灰岩总孔隙度为5%~12%，各材料均表现为以中孔材料为主的吸附行为，最可几孔半径为25~33nm之间；各样品比表面积与氮气吸附总量呈正相关。%In this paper, the limestone was acted as a porous material, different sub section limestone porosity value is calculated using the sonic logging curve, the nanoscale aperture distribution is studied using the nitrogen adsorption method combined with X-ray diffraction. Test results show that the different sub section limestone total porosity is 5-12%, the materials showed adsorption behavior based on mesoporous materials, The most probable aperture radius are between the 25-33nm; the specific surface area of each sample was positively related with the nitrogen adsorption amount.
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