A Study of WaterInjection Applicationfor increasing oil Recovery in South AnnajmaOil Field-Sudan

Abstract

Water flooding is the most widely used secondary recovery process in the world today. Along with the recent decades, water injection is still a promising technique for improving oil recovery. The main objective of this work is to ascertain the optimal water injection arrangement to vertical water flooding at the South Annajma oil field using a reservoir simulation model (ECLIPSE) commercial software. This work came out with analyses of oil production rate, water cut, reservoir pressure drop, accumulated oil production, and recovery factor for the South Annajma reservoir as a heterogeneous model. The result of this simulation work showed the effectiveness of eight years of water flooding in the enhancement of production performance. However, South Annajma reservoir heterogeneity would introduce an uncertainty of geological model, which could bring a mismatch between the simulated case and a real case, the increase in oil recovery achieved throughout the model scenarios is 32%.