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Eliminating Gas Interference and Blockage in Sucker Rod Pumping Systems to Improve Oil Production

Abstract:

Oil production in mature oilfields is affected by the decrease of reservoir energy; it generates free gas presence in reservoir and well. The free gas presence during the process of lifting fluid by sucker rod pumping systems can generates blockage or interference in the bottom pump, therefore, lowers the efficiency and the capacity to lift fluid in each oil wells production. In this project it seeks to optimize the bottom hole equipment of the sucker rod pumping lifting system in the Petropolis oilfield. The methodological process applied in this study was theoretical-experimental; the characteristics of the fluid and the pressure drop between the reservoir and the well were used to determine the optimal lifting flow in the system. Finally, was sized the bottom tool, it is consisting of a gas separator located in the bottom pump, in order to reduce gas interference and blockage. Considering the implementation of the gas separator in each well analyzed, it was possible to increase oil production in all wells from 12% to 21% approximately. Due to the maturity of the oilfield and the present conditions of each wells, the use of gas separation system in bottom well was implemented to optimize the pump’s performance, managing to increase oil production and therefore increase economic income.