Optimization Waterflood Development Strategic in Mature Field Using 4 Variables Scatter Plot, Case Study : Kenali Asam Field

Abstract

More than 80% of the oil field in Indonesia is a Mature field which have significant drop in reservoir pressure (depleted). Water injection is a common method of maintaining pressure maintenance in mature field. However, after reservoir pressure has increased, we need to increase the efficiency sweep by using waterflooding method. Therefore need a good the development strategy of waterflood that can gives an additional oil production recovery. Potential oil gain from waterflood can be optimal only if using a good reservoir management strategy. Good reservoir management of waterflood are including selection of well spacing between producer-injector, optimum injection rate determination and surveillance monitoring of injection response at production wells.
When designing full scale waterflood in a field, lesson learn from reservoir response in pressure maintenance can be the main key. the Increasing gross, increasing reservoir pressure, early breakthrough and other reservoir behavior can give us description of what are the limitation in terms of injection rates and optimum well distances in making waterflood strategy of the field.
This paper will discuss about making strategy in optimizing waterflood development with Case Study of Kenali Asam field by using plot 4 Scatter plot variables. The 4-variables which plotted in scattered plot are including Injection rate, spacing between producer and injector wells, Injection cumulative, and Permeability based on injection history which have been done in previous pressure maintenance period since 1995.