A novel saturation model of vuggy carbonate reservoirs and its application
The traditional Archie model has certain inapplicability in carbonate reservoirs, due to the complex pore structure and strong heterogeneity.For example, the variable values of cement index (m) and saturation index (n) often lead to a great deal of difficulties in saturation estimation.Based on the rock physics volume model, the saturation index (n) is assumed to be constant and redefine cementation exponent (m) as a pore structure index.It is used to instead of the effect of the original Archie cementation exponent and saturation index on water saturation calculation.Rock physics experiment is hard to apply to the rocks from the complex reservoir.For the carbonate sample with fracture and dissolution vuggy, we cant obtain the cores easily.Therefore, the effects of the law of aspect ratio, porosity, clay content on the formation factor F and pore structure index of carbonate reservoir rocks are studied by numerical simulation.A new saturation model with variable index of pore structure is developed after the compositions of pore structure are employed in our research.The field logging data from one well in Sichuan Oil field is processed using the new saturation model, and the applications of the new saturation model suggest that saturation precision has been improved.
Vuggy carbonate reservoirs Digital core Pore structure index Saturation model
Jiang Li-ming Yu Chun-hao Qi Bao-quan Zhu Han-bin Wang Yong-jun
Technology Center, China Petroleum Logging CO.LTD., Xian, Shanxi 710077;Well Logging Key Laboratory CCDC, Well logging company, Chongqing, Sichuan 400021
国际会议
西安
英文
235-242
2017-09-20（万方平台首次上网日期，不代表论文的发表时间）