Abstract

This paper details the findings and outcomes of field trials of a new artificial lift technology.

The technology is a submersible permanent magnet drivetrain for a progressing cavity pump which was tested for cyclic steam stimulation heavy oil applications in the San Joaquin Valley, California. The drivetrain has been designed to provide sufficient torque with high efficiency within a small package, enabling optimum placement within the wellbore.

The effectiveness of steaming and the geothermal temperature variance at the reservoir is investigated using multiple data points over time. The impact of operating the artificial lift system at different speeds is explored, including interpretations of specific downhole events during the trials. Field trial data, from field installations is presented, from which key findings are shown. This paper will present a study into the relationship between progressing cavity pump performance, temperature, oil cut and fluid viscosity.

The effect on the well production and performance with respect to events and activity in surrounding wells was also analysed using surface and downhole data collected during the trials.

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