ABSTRACT

The influence of degassing on the production process with a twin-screw multiphase pump (MPP) conveying paraffinic white oil, dry air and carbon dioxide is investigated experimentally. As the solubility of gas in oil depends on the pressure, degassing occurs due to local variations of pressure in the porous reservoir rock, the pipework and inside the MPP. The two-phase flow in the pipework before the MPP is observed by means of an electrical capacitance tomography (ECT) system and gives information about the loss flow and sorption phenomena inside the twin-screw MPP. The conveying characteristic and isothermal efficiency of the MPP are determined according to thermodynamics.

Keywords:
efficiency, upstream oil & gas, fraction, sorption phenomenon, loss flow, solubility, gas fraction, mpp, pressure difference, multiphase 7
Subjects:
Artificial Lift Systems, Hydraulic and jet pumps
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2010. BHR Group 2010 Multiphase 7
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