Determination of Location and Number of Optimum Development Wells in "Nero" Field Using Reservoir Simulation
Keywords:
OOIP, OPU, recovery factor, reservoir simulation, infill wellAbstract
The "Nero" field is an oil field located in the Central Sumatra Basin. The productive zone located on Lakat Formation at depth 1241 ft to 1830 ft with water drive mechamism. This field has been produced from November 1970 to December 2019 with cumulative oil production of 6,202 MMSTB or 31.03% of OOIP with only 5 production wells and 2 injection wells. The average porosity of the “Nero” field is 0.21, with average permeability of 888.4 mD and reservoir pressure of 601.7 psi. To optimize the recovery factor, determination of location and number of infill well must be done. This become the purpose of this study. This study contain with reservoir simulation Computer Modelling Group (CMG) IMEX 2015.10 with grid dimention 64x50x60 and projected to 2070. The process began with initialization, history matching, and projecting scenario. Development of this field depend on the amount of Oil per Unit Area (OPU) by considering the drainage radius and the distance between wells. From the scenario 1 the cumulative production obtained is 6.46 MMSTB with a current recovery factor value of 32.30%. Scenario 2 done with cumulative production of 7.17 MMSTB with current recovery factor of 35.89%. Scenario 3 done with cumulative production of 8.094 MMSTB and current recovery factor of 40.50%. Also from the scenario 4 cumulative production gain with 8.066 MMSTB with recovery factor of 40.36%. From this case, it can be seen scenario 3 is the best option with the addition of 1 reopening well and 6 infill wells.
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