Perforation Sequence Optimization of Fault Block Oil Reservoir with Edge Water on the Basis of Pseudo-filtration Resistance Analysis

Abstract

Perforation sequence of multiple zone is affected by many factors for natural water flooding in Fault block oil reservoir. In order to study on the affecting factors including permeability, length of banded oil layer and viscosity of oil, a two-layer reservoir model was established. The combination schemes was found for three affecting factors. The numerical simulation research was carried out and influence of the factors on perforation sequence of fault block oil reservoir with edge water was analyzed. The results show that the larger the factor contrast is, the greater the reservoir heterogeneity is, the later the perforation sequence is for the reservoir which has finer property, the more the increased range of recovery ratio is. The boundaries of technique for optimization of multiple zone perforation sequence was determined by the pseudo-filtration resistance ratio with the range between 0.023 and 43.88; The relation graph of pseudo-filtration resistance ratio, pseudo-filtration resistance with optimal perforation sequence was made by Watson interpolation algorithm. It is of great significance to improve the reservoir development effect.