Fractal Characteristics of Pore Structure of Lower Cambrian Shale in Southeast Chongqing Using Nitrogen Adsorption Data

作者：Jia Xiong · 发表于：Keji daobao · 年份：2014 · 被引用次数：1 · 研究领域：Hydrocarbon exploration and reservoir analysis、Geoscience and Mining Technology、Coal Properties and Utilization

The fractal dimensions of pore structure of shale in the southeast Chongqing are calculated using the FHH model based on measured results of the pore structure by nitrogen adsorption. The result shows that the fractal dimensions of pore structure of shale in the southeast Chongqing obviously have the aperture boundary point, that is to say, have the dual fractal feature. The fractal dimension values of the big pore structure are 2.3559-2.6577, with an average of 2.488, and the fractal dimension values of the small pore structure are 2.5971-2.8746, with an average of 2.7631. The small pore structure, with a larger fractal dimension value, shows a higher degree of complexity than the large pore structure. There is a positive correlation among the fractal dimension values of shale pore structure and TOC content, gas adsorption, specific surface area and pore volume. Especially, it is found that the fractal dimension values show a significantly positive correlation with the specific surface area and pore volume. Whereas, there is a negative correlation between the fractal dimension values of shale pore structure and clay mineral content.