A New Pressure/Rate-Deconvolution Algorithm To Analyze Wireline-Formation-Tester and Well-Test Data


Pimonov E., Ayan C., Onur M., Kuchuk F.

SPE RESERVOIR EVALUATION & ENGINEERING, vol.13, no.4, pp.603-613, 2010 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 13 Issue: 4
  • Publication Date: 2010
  • Doi Number: 10.2118/123982-pa
  • Title of Journal : SPE RESERVOIR EVALUATION & ENGINEERING
  • Page Numbers: pp.603-613

Abstract

Reconstructing constant-rate drawdown-pressure response and its logarithmic time (or Bourdet) derivative by deconvolution from multirate pressure-transient data is very important for wellbore-/reservoir-system identification and interpretation In recent years, the use of pressure/rate deconvolution has increased considerably because of significant improvement of the algorithms In this paper, we present a new deconvolution algorithm based on a weighted Euclidean norm in the Tikhonov (1963) regularized objective function so that one can assign weights to individual pressure- and rate-measurement points, and, thus. define different error estimates for different sections of the data. Incorporating such features into the deconvolution algorithm is very useful to mitigate the effects of unreliable pressure and rate measurements and the sections of the data not obviously consistent with the wellbore/reservoir model