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- W115460559 abstract "The ability to estimate descriptive engineering parameters, such as permeability, and generate production forecasts and estimate ultimate recovery on the basis of these parameters without the cost of full numerical simulation or extended build-up tests is provided by the reciprocal-productivity-index (RPI) graphical production-analysis method. The method`s theoretical basis is that the traditional constant-rate or pressure boundary conditions are sufficient, but the necessary boundary condition only requires the outflow-face transmissibility to remain constant over time. With that difference, it is possible to evaluate production histories accurately by use of traditional well-testing methods when both the rate and producing pressure are varying with time. Just as with pressure-transient analysis, the RPI method is amenable to both manual interpretation and computerization. The latter enjoys the benefit of greater speed and incorporation of other factors, such as wellbore friction loss and head calculations, as well as more robust treatment of nonideal fluids. The RPI method is a means to perform history matching (inverse simulation) quickly for diagnostic purposes for both oil and gas wells in which either or both the rate and pressure vary with time. The examples detailed in the full-length paper demonstrate that RPI offers a means to test different explanations (models)more » for their impact on a well`s behavior. This method relieves a great weakness of usual history-matching procedures, where the model for the system behavior must be declared before the process begins.« less" @default.
- W115460559 created "2016-06-24" @default.
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- W115460559 date "1997-12-01" @default.
- W115460559 modified "2023-09-26" @default.
- W115460559 title "Reciprocal productivity index for oilwell and gaswell evaluation" @default.
- W115460559 hasPublicationYear "1997" @default.
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