Abstract

HPAI in Light oil reservoirs have gained a success nowadays in the field. Air injection in light oil is decided on the basis of in which phase of the life reservoir stands. The main aim of this EOR method is to strip out the Lighter Hydrocarbons from the residual Heavy Fractions and also to act as a pressurizing agent as from conventional heavy oil reservoirs to reduce the viscosity and removing the residual oil saturation. The factors affecting the HPAI are Geology and the Geological structure and the reaction kinetics parameters like reaction frequency, enthalpy, activation energy and the mode of reaction i.e. Low Temperature Oxidation (LTO) and High Temperature Oxidation (HTO). In this paper, the laboratory procedures, for the Air injections have been calculated i.e. the velocity of the combustion front, temperature profiles and the ignition time of the initiation of reaction. Simulation of combustion tube experiment has been carried out and expanded to the block model in CMG STARS. The tuning of the reaction parameters is to generate the temperature profile of the twelve zones of the combustion tube experiment. History matching with the data generated in simulation and the outcomes of the laboratory experiment is performed. The block model with five spot inverted pattern predicts the variation of oil saturation, temperature, oil cut, water cut, cumulative fluid rates with time. The conclusion from this simulation is the feasibility of High Pressure Air injection processes in Light Oil Reservoir and predicting the future performance in the reservoir. The results from this simulation were that the clay particles affect the reaction kinetics in the Light Oil and the increment in the recovery is about 20 % because of HPAI.

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