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Analyzing Well Performance XV
This paper was prepared for presentation at the 1987 Artificial Lift Workshop sponsored by Gulf Coast Section of SPE, April 22-24, 1987 in Houston. Texas.
The Analyzing Well Performance XV paper describes the methods used to calculate key operational parameters by hand. These calculated parameters are used to "Analyze Well Performance." Analyzing well performance is an important step toward increasing profits by improving production techniques. The analysis is made by acoustic field tests and examination of well data. The acoustic liquid level instrument permits determination of the producing and static bottomhole pressures and hence the producing rate efficiency of the well. Improvements in the acoustic determination of bottomhole pressures for practical needs have occurred in recent years and are presented in the paper.
A user friendly software program: AWP2000 is available for computer calculation of bottomhole pressures. Input information includes well data, fluid data and acoustic data. The computer calculates the gas gravity, gas column pressure, corrected oil gradient and corrected water gradient and the resulting Producing Bottom Hole Pressure, PBHP and Static Bottom Hole Pressure, SBHP. The AWP2000 software can be downloaded free of charge from the Echometer Software web page.
An analysis of a producing well requires knowledge of the PBHP and SBHP, a well test, and the pump capacity. A convenient form for presenting this data is shown on the WELL ANALYSIS SHEET. In addition lo the above data, the producing rate efficiency and the maximum production rates can be determined. The hand calculation of the PBHP and SBHP can be done using the well analysis worksheet.
A new computerized Well Analyzer is available to perform the analysis described herein. The Well Analyzer consists of a laptop computer and an analog to digital converter. The Well Analyzer is used in conjunction with acoustic sensors to obtain acoustic downhole data from which all of the Analyzing Well Performance parameters are calculated automatically.
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