石油とガスの研究

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Optimum Pattern and Rate Injection Determination of Waterflooding Project (Case Study in Block "A" on "DS" Field)

Herianto

“DS” field is one of the mature field located in Block “A” which has been produced since 1975. The remaining reserves of this field is 14,285 MSTB with remaining recovery factor 25.04%. The Water Oil Contact is up-leveling during the production phase where in current condition, this field has high water cut which means high water production. While the remaining reserves is still big enough to produce and the field produces a lot of water, field development with waterflooding method may be applied. Analysis of development scenarios using ECLIPSE 2010.1 reservoir simulation software. The parameter considered is the pattern and rate of injection. Base case is a scenario that simulates the field from history matching condition until August 2032. Scenario 2 with peripheral injection pattern and the 9 scenarios of injection rate. Scenario 3 with regular injection patterns 5 and 6 spots injection rate scenario. Scenario 4 with regular injection patterns 4 spot and 6 injection rate scenario. From engineering analysis, the best scenario is Scenario 2 with 10 peripheral injection wells but from economic analysis, the best fit scenario is Scenario 3 with 8 5-spot injection wells.