Integrated Capacitance-Resistance Model for Characterizing Waterflooded Reservoirs

Capacitance-resistance modeling of petroleum reservoirs has been used successfully to analyze transient behavior of petroleum reservoirs both onshore and offshore. This paper presents a linear reservoir model that provides advantages over the nonlinear capacitance-resistance model: convex objective function, efficient solution, and direct estimation of confidence limits on model parameters. The proposed procedure uses a constrained linear multivariate regression to infer preferential permeability trends and fractures in a waterflooded reservoir. The relationship between interwell connectivities and interwell-distance between injector-producer well-pairs was also investigated.