Deconvolution allows the test analyst to estimate the constant-rate transient pressure response of a reservoir-well system, and assists us in system identification and parameter estimation. Unfortunately, deconvolution amplifies the noise contained in data. Often, we cannot identify the reservoir system from deconvolved results owing to solution instability caused by noise in measured data. We previously presented a deconvolution technique based on the fast Fourier transform that we applied to a single buildup or drawdown period. In this paper, we extend our previous work and apply the deconvolution technique based on the fast Fourier transform to arbitrarily changing rate profiles such as multirate tests. The deconvolution results, which represent a constant-rate pressure drawdown response spanning the entire duration of the test, can provide helpful insight into the correct reservoir description. We have improved our original deconvolution method in number of ways, particularly with the introduction of an iterative algorithm that produces stable deconvolution results. We demonstrate application of our deconvolution method to analysis of synthetic and field examples, including both flow and shut-in periods. Our deconvolution method can efficiently reproduce the characteristic responses of the reservoir-well system and increase our confidence in parameter estimates.
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e-mail: yueming.cheng@mail.wvu.edu
e-mail: john.lee@pe.tamu.edu
e-mail: duane.mcvay@pe.tamu.edu
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March 2011
Research Papers
Advanced Deconvolution Technique for Analyzing Multirate Well Test Data
Yueming Cheng,
Yueming Cheng
Department of Petroleum and Natural Gas Engineering,
e-mail: yueming.cheng@mail.wvu.edu
West Virginia University
, Morgantown, WV 26506-6070
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W. John Lee,
W. John Lee
Department of Petroleum Engineering,
e-mail: john.lee@pe.tamu.edu
Texas A&M University
, College Station, TX 77843-3116
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Duane A. McVay
Duane A. McVay
Department of Petroleum Engineering,
e-mail: duane.mcvay@pe.tamu.edu
Texas A&M University
, College Station, TX 77843-3116
Search for other works by this author on:
Yueming Cheng
Department of Petroleum and Natural Gas Engineering,
West Virginia University
, Morgantown, WV 26506-6070e-mail: yueming.cheng@mail.wvu.edu
W. John Lee
Department of Petroleum Engineering,
Texas A&M University
, College Station, TX 77843-3116e-mail: john.lee@pe.tamu.edu
Duane A. McVay
Department of Petroleum Engineering,
Texas A&M University
, College Station, TX 77843-3116e-mail: duane.mcvay@pe.tamu.edu
J. Energy Resour. Technol. Mar 2011, 133(1): 012901 (8 pages)
Published Online: February 17, 2011
Article history
Received:
September 3, 2010
Revised:
January 5, 2011
Online:
February 17, 2011
Published:
February 17, 2011
Citation
Cheng, Y., Lee, W. J., and McVay, D. A. (February 17, 2011). "Advanced Deconvolution Technique for Analyzing Multirate Well Test Data." ASME. J. Energy Resour. Technol. March 2011; 133(1): 012901. https://doi.org/10.1115/1.4003442
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