标题：Analysis of pore characteristics of reservoir rock based on CT scanning—taking the tazhong block of tarim basin as an example
作者：Guo, Ying ;Yang, Yong ;Ren, Guangying ;Ni, Jinlong ;Cheng, Hanlie
作者机构：[Guo, Ying ;Ren, Guangying ] Institute of Geology and Paleontology, Linyi University, Linyi; Shandong; 276000, China;[Yang, Yong ] Institute of Geomec 更多
会议名称：8th International Field Exploration and Development Conference, IFEDC 2018
会议日期：September 18, 2018 - September 20, 2018
来源：Springer Series in Geomechanics and Geoengineering
摘要：At present, the research methods of micropore structure mainly include mercury pressure method, scanning electron microscope, casting thin film, laser confocal, and nuclear magnetic resonance. Mercury porosimetry is a fast and accurate method with high pressure. It is the main method to measure capillary pressure at present, but this method can only measure pore throat characteristics and can not quantitatively get the microscopicpore characteristics and rock images. Scanning electron microscopy, casting thin film, and laser coke can only obtain two-dimensional local pore characteristics and cannot obtain three-dimensional images and quantitative characteristics. For the fractured vuggy carbonate complicated pore structure, hole and crack connectivity in Ordovician in Tazhong fractured vuggy carbonate reservoir was chosen forfurther evaluation. The core CT scanning image is processed by two values. After processing, the number of pore pixels in core samples is different from those of the sample particles. According to the number of pixels in pores, the total area of all pores and the area of CT image are calculated, and then, porosity is determined. Finally, the three-dimensional reconstruction of the digital core is formed to analyze the characteristics of the core hole. The face rate of CT scanning is close to that of the conventional casting sheet analysis, which proves the reliability of the CT scanning results. It can be realized that the scanning and quantitative analysis of the full diameter and plunger sample accurately obtain the physical parameters of the rock.
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