Fractal Characteristics of the Pore Structure of Low Permeability Sandstone
Based on the laboratory testing of mercury injection with natural cores of low permeability, such analyses were made as the changing law of capillary pressure curves, the distribution features of different size pores and the correlation of pore structures to inside fluid distribution.The fractal method was also used to analyze the two-section line fitting effect of the fractal dimensions and their relationship with the pore distribution laws.The results show that the low permeability reservoir has complicated pore system with high scale of fractal pores, of which the log-log correlation of SHg~Pc can be fitted well with two-section lines, and the two-sections fractal dimensions calculated have greater difference than that of medium & high permeability reservoirs.The study indicates advantages of the fractal method to describe the heterogeneous pore distribution of the low permeability sandstones.
low permeability pore structure fractal dimension heterogeneity mercury injection method
Qin Sheng-gao Wu Hong-li Tian Mao-bin Wu Jing-chun Yao Shanglin
Sinopec International Petroleum E & P Corp.,Beijing,100029,China Key Laboratory of Enhanced Oil and Gas Recovery of Education Ministry,Northeast Petroleum University China University of Geosciences (Beijing),Beijing 100083,China;Research Institute of Petroleum Explo
国际会议
the 3nd International Conference on Digital Manufacturing & Automation (第三届数字制造与自动化国际会议(ICDMA 2012))
桂林
英文
482-486
2012-08-01（万方平台首次上网日期，不代表论文的发表时间）