Effects on Well Test Analysis of Pressure and Flowrate Noise Conference Paper uri icon

abstract

  • Abstract We have utilized sets of simulated well tests in an example well/reservoir model with an unfractured vertical well or a vertical well with a finite-conductivity (vertical) fracture to demonstrate the dependence of the estimated parameters and their confidence intervals on noise in the pressure and flowrate data. Uniformly distributed random noise is introduced into the pressure data and the resulting well parameter estimates are obtained using conventional means (analysis/history matching). For the cases of a pressure buildup test in an unfractured well and the pressure drawdown cases performed on a fractured well, the estimated parameters are almost without bias and the confidence intervals grow linearly with the magnitude of the noise. For the cases of pressure buildup tests performed on the fractured well, the estimated parameters are insensitive to the noise which suggests that this case may not be well-posed for analysis. Gauge drift and flowrate noises were also considered and the analysis results from the example well tests demonstrate that both of these kinds of noise are handled robustly by conventional well test analysis techniques.

name of conference

  • All Days

published proceedings

  • All Days

author list (cited authors)

  • Archer, R. A., Merad, M. B., & Blasingame, T. A.

citation count

  • 3

complete list of authors

  • Archer, RA||Merad, MB||Blasingame, TA

publication date

  • September 2002