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Experimental and simulation studies for optimization of waterealternating-gas(CO2)flooding for enhanced oil recovery

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Petroleum Research 2020年第3期5卷 227-234页

作者： Swapnil Pancholi Gudendra singh negi Jatin R.Agarwal Achinta Bera Maunish Shah Drilling Cementing and Stimulation Research CenterSchool of Petroleum TechnologyPandit Deendayal Petroleum UniversityGandhinagarGujarat382007India

The paper deals with the screening of injection of water-alternating-gas(WAG)to tap the residual oil saturation left in the reservoir by over and above the water *** detailed mineralogical composition has been studied by X-ray diffraction(XRD)method along with the petrophysical parameters to see their impacts of flow on Himmatnagar(India)***,aromatics,resins,and asphaltenes present in the crude oil were determined by ASTM *** miscibility pressure of CO2 with the crude oil was determined and it has been found at 1254 psi based on thermodynamic *** WAG ratios of 1:1,1.5:1 and 2:1 have been applied for EOR during *** on water injection followed by CO2 has been performed for investigation of the WAG process efficiency.A total 2 cycles of WAG injection was done with water flow rate of 1 ml/min and gas injection pressure around 1250 psi to achieve the better contact *** experimental data has been generated,compiled and interpreted during different cycles of WAG *** was observed that WAG ratio 2:1 exhibits highest additional oil recovery around 34%of original oil in *** WAG ratio yields more additional oil recovery.

关键词： Water-alternating-gas injection Minimum miscibility pressure Enhanced oil recovery WAG ratio WAG cycle

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