Prediction of reservoir performance in multi-well systems using modified hyperbolic model
Journal of Petroleum Exploration and Production Technology
Department of Petroleum and Gas Engineering, University of Lagos, Akoka, Yaba, Lagos, Nigeria; Department of Petroleum and Gas Engineering, University of Port-Harcourt, Port-Harcourt, Nigeria; Department of Chemical Engineering, University of Lagos, Akoka
Decline curve analyses are usually based on empirical Arps' equations: exponential, hyperbolic and harmonic decline. The applicable decline for the purpose of reservoir estimates is usually based on the historical trend that is seen on the well or reservoir performance. This remains an important tool for the reservoir engineer, so that the practice of decline curve analysis has been developed over the years through both theoretical and empirical considerations. Despite the fact that the fundamental principles are well known and understood, there are aspects which can still lead to a range of forecast and reserve estimates that until now have not been investigated. In this work, a model was developed considering the effect of well aggregation and interference in multi-well systems. This approach accounts for the entire production history of the well and the reservoir, and thus reduces the influence of well interference effects on decline curve analysis. It provides much better estimates of reserves in multi-well systems. The models were validated with field data from different wells. Production decline data from different wells in a reservoir were analyzed and used to demonstrate the application of the developed model. © 2011 The Author(s).
Arps' equation; Decline curve analysis; Decline curves; Developed model; Field data; Forecast; Fundamental principles; Historical trends; Hyperbolic models; Prediction of reservoir; Reserve estimates; Reservoir engineers; Reservoir performance; Well interference; Estimation; Oil well production; Wave interference; Wells; Forecasting