Production Forecast for a Subsea Multiphase Pumping System in the Marlim Field

This paper presents a methodology to simulate the equilibrium oil, water and gas flow rates of a well boosted by a twin-screw multiphase pump. Based on this methodology, the operational condition of the subsea multiphase pumping system to be installed in the Marlim field at Campos Basin (Brazil) is simulated for the next twenty years. For each year, the well equilibrium flow rates, and the suction/discharge pressures and temperatures are predicted as a function of the motor speed. The study shows that the average oil flow rate of the host well 7-MRL-72D-RJS shall increase, due to the pump, from about 1,300 m³/d to about 2,100 m³/d in the next ten years. In the following ten years, both oil rates, without and with the pump, decrease. At the end of the twenty-years period, the oil flow rates shall be about 700 m³/d and 1000 m³/d, respectively. The oil anticipation, induced by the subsea multiphase pumping system, is equivalent to a net present volume of around 14 million barrels for the entire system design life. A summarized description of the referred subsea multiphase pumping system is also provided in this paper.