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Abstract

Sucker rod pumping system is the mechanical oil production method first used, up to now, it is also the most widely applied artificial lift method, however, three performance curves( displacement ~pump differential pressure, displacement ~ horsepower, displacement ~ efficiency) of sucker rod pumping (SRP), which are equivalent to those of electric submersible pump(ESP) and progressive cavity pump(PCP), are not available, increasing the complexity when node analyzing and designing of SRP well. As is known to all, when optimization design of SRP well, trial method is generally used and the operating time is long. Considering the interference of tubing, rod, wellbore fluid and piston pump when working, the subsurface system could be studied as a whole, and the relations between displacement and pump differential pressure, horsepower and pump differential pressure are researched. The dimensionless performance curves of SRP can be obtained based on API RP 11L standard. Three performance curves of subsurface system, namely the relation curves of displacement ~pump differential pressure, displacement ~ horsepower, displacement ~ efficiency, are drawn for the first time. The characteristics of these performance curves are analyzed, showing these curves described in this article can effectively reflect the working characteristics of the subsurface system of SRP. The subsurface performance curves can be a useful tool for sensitivity analysis and optimization design of SRP system. These curves allow developing a general nodal analysis algorithm for any artificial lift pumping method and a more convenient optimization design algorithm for composite pumping system, such as Jet- Rod pumping system.

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/content/papers/10.3997/2214-4609-pdb.350.iptc17146
2013-03-26
2024-03-29
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