Sensitivity analysis in a recovery process with surfactant and polymer (SP).

IBAÑEZ J. P., FORNÉS A. HUESPE J.V., A. ORTIZ K

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Congreso; International Petroleum Technology Conference; 2014

SPE

Enhanced oil recovery through SP floodings have reported optimal results in the reduction of oil residual saturation, due to a reduction of interfacial tension and mobility relation between oil and water. Design behind this kind of processes presents some critical variables such as polymer and surfactant slug size and concentration. This has a decisive impact on the reservoir performance. Consequently, the design variables chosen for the present work are slug size, chemical concentration, and cumulative oil production. The sensitivity analysis properly speaking, was achieved via the individual and total sensitivity index for the variables and its interaction. The surrogate models utilized for the calculations were Polynomial Regression (PRG) and Kriging. Results have shown the efficiency of the approach, because it enables relative contribution between variables to the overall efficiency with a limited number of simulations.