用数字化图像分析法确定岩石物性

Application of Digital Image Processing to Determination of Petrophysical Property

分形与多重分形作为复杂性科学研究的手段之一,已渗透到地球科学的各个领域,在元素含量分布、矿床储量分布、岩石孔隙分布等方面都取得了良好的应用效果。碳酸盐岩储集层的结构分析是国内外学者广泛关注的热点问题之一,传统研究方法已不足以描述碳酸盐岩储集层微观结构的复杂性特征。在选取鄂西渝东地区峡口和石柱两个剖面大三段、长二段、嘉三段不同层位和不同深度以及部分岩心样品基础上,通过制作碳酸盐岩薄片,拍摄微观孔隙裂隙的环境扫描电镜照片,在MATLAB平台下采用数字图像分析可以获取孔隙度、渗透率、形态参数等相关的统计数据。通过与实测的物性参数对比,此方法切实可行,具有传统实验方法无法比拟的优势。

Fractal or muhi-fractal as one of complexity sciences has been applied into various fields of geoscience such as element concentration, ore-deposit reserves and rock porosity distribution, etc. with good results. A lot of attention has been paid to the study of micro-structures of carbonate rocks in recent years as it has been recognized extensively that traditional analysis methods are fault and not enough to depict the complexity of them. Lots of samples from outcrops in different lithological strata in Dasan member, Chang＇er member and Jiasan member are selected in Xiakou and Shizhu cross sections in western Hubei province to study their micro-structures and acquire the statistical parameters like porosity, permeability and shape, etc. By comparing with the measured physical data, it could draw a conclusion that this method is feasible and superior to conventional experiment method.