Nonlinear filtering in oil/gas reservoir simulation: filter design

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In order to provide an additional mode of utility to the USGS reservoir model VARGOW, a nonlinear filter was designed and incorporated into the system. As a result, optimal (in the least squares sense) estimates of reservoir pressure, liquid mass, and gas cap plus free gas mass are obtained from an input of reservoir initial condition estimates and pressure history. These optimal estimates are provided continuously for each time after the initial time, and the input pressure history is allowed to be corrupted by measurement error. Preliminary testing of the VARGOW filter was begun and the results show promise. Synthetic ... continued below

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Arnold, E.M.; Voss, D.A. & Mayer, D.W. October 1, 1980.

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Description

In order to provide an additional mode of utility to the USGS reservoir model VARGOW, a nonlinear filter was designed and incorporated into the system. As a result, optimal (in the least squares sense) estimates of reservoir pressure, liquid mass, and gas cap plus free gas mass are obtained from an input of reservoir initial condition estimates and pressure history. These optimal estimates are provided continuously for each time after the initial time, and the input pressure history is allowed to be corrupted by measurement error. Preliminary testing of the VARGOW filter was begun and the results show promise. Synthetic data which could be readily manipulated during testing was used in tracking tests. The results were positive when the initial estimates of the reservoir initial conditions were reasonably close. Further testing is necessary to investigate the filter performance with real reservoir data.

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NTIS, PC A03/MF A01.

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  • Report No.: PNL-3553
  • Grant Number: AC06-76RL01830
  • DOI: 10.2172/6994727 | External Link
  • Office of Scientific & Technical Information Report Number: 6994727
  • Archival Resource Key: ark:/67531/metadc1190449

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Office of Scientific & Technical Information Technical Reports

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  • October 1, 1980

Added to The UNT Digital Library

  • July 2, 2018, 10:52 p.m.

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  • Nov. 2, 2018, 6:28 p.m.

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Arnold, E.M.; Voss, D.A. & Mayer, D.W. Nonlinear filtering in oil/gas reservoir simulation: filter design, report, October 1, 1980; United States. (digital.library.unt.edu/ark:/67531/metadc1190449/: accessed November 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.