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Two producing reservoirs (H10 and E40) in Eni field Offshore Niger Delta were studied with intent to enhance their rate of recovery while mitigating water production. The material Balance software MBAL was used to estimate the Stock tank oil reserves and then compared to reserve estimates determined by both deterministic and stochastic techniques for improved validation. The MBAL model was also used to identify positions of fluid contacts and determine predominant drive mechanisms. These serve as guide in making informed decisions towards if and how best to economically produce remaining unproduced oil in place. Input parameters were average values derived from core and well logs analyses.
History matching of historical data enabled forecasts of possible future production life and volume at multiple scenarios.
Final outcomes show that after sixteen and forty five years of continuous production from the reservoirs studied (H10 and E40, respectively), remaining unproduced oil in place are still significant and can be economically produced by infill wells, which will in return increase the average production by nothing less than 33% of remaining oil in place, a substantial value bearing in mind the growing demand for oil, gas and other energy sources to lessen the apparently unquenchable world energy needs.
Cook G, Chawathe A, Larue D, Legarre H, Ajayi E. Incorporating sequence stratigraphy in reservoir. An integrated study of the meren E-01/MR05 sands in the niger delta. Houston (Texas), February, paper SPE 51892, presented at the SPE Reservoir Simulation Symposium. 1999; 14-17.
Poston SW, Berry P, Molokwu FW. Meren field: The geology and reservoir characteristics of a Nigerian Offshore Field, paper SPE 10344 presented at the SPE Annual Technical Conference and Exhibition, San Antonio; 1981.
Lumley DE, Nunns AG, Delorme G, Adeogba AA, Bee MF. Meren field, Nigeria: A 4D Seismic Case Study, paper OTC 12098 presented at the Offshore Technology Conference, Houston, TX; 2000.
Kruger WD. Determining areal permeability distribution by calculations. J. Pet. Tech. 1961;691.
Jacquard P, Jain C. Permeability distribution from field pressure data, Soc. Pet. Eng. Journal. 1965;281-294.
Oladipo MK. Integrated reservoir characterization: A case study of an onshore reservoir in Niger Delta Basin. MSc. Thesis, Unpublished, African University of Science and Technology; 2011.
Tarek PP. Reservoir engineering handbook. Texas: Gulf Professional Publishing; 2001.
Djebbar T, Donaldson EC. Petrophysics - theory and practice of measuring reservoir rock and fluid transport properties (2nd Edition). USA: Elsevier Gulf Professional Publishing; 2004.