Abstract

Understanding the performance and behavior of a sucker rod pumping system can be a difficult and time consuming task but is a requirement to optimize the performance of a large number of wells by efficiently identifying and correcting production problems. Streamlined and optimized acquisition of dynamometer, fluid level and pressure data has been achieved using fourth generation wireless instrumentation that is quickly installed at the surface and is controlled by a user friendly graphical application that requires minimum user intervention.

During a well monitoring session the data records are acquired seamlessly without interruption of the operator's workflow. Results are displayed in real time including quantitative visualizations of the downhole rod pump operation, plunger motion, valve action and fluid flow. Pump intake and discharge pressures are computed and displayed in synchronization with plunger movement, pump liquid fillage, traveling valve operation and standing valve operation. The pump animation is computed by the solution of the wave equation using the polished rod load and acceleration data stream and presented simultaneously with the corresponding fluid distribution and pressures in the wellbore obtained from the acoustic fluid level survey. The user can see, at a glance, the total performance of the well and lift system without having to devote much time to interpret a conventional dynagraph or fluid level record. Evaluation of the performance of the well and artificial lift system is performed at the well so that reports and recommendations for optimization can be issued immediately.

This paper presents the physics and the practical aspects of the application of these advanced analysis and well monitoring tools. Case studies are presented showing analysis on a variety of wells.

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