Co-history Matching: A Way Forward for Estimating Representative Saturation Functions

Pedram Mahzari, Ali AlMesmari, Mehran Sohrabi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Core-scale experiments and analyses would often lead to estimation of saturation functions (relative permeability and capillary pressure). However, despite previous attempts on developing analytical and numerical methods, the estimated flow functions may not be representative of coreflood experiments when it comes to predicting similar experiments due to non-uniqueness issues of inverse problems. In this work, a novel approach was developed for estimation of relative permeability and capillary pressure simultaneously using the results of “multiple” corefloods together, which is called “co-history matching.” To examine this methodology, a synthetic (numerical) model was considered using core properties obtained from pore network model. The outcome was satisfactorily similar to original saturation functions. Also, two real coreflood experiments were performed where water at high and low rates were injected under reservoir conditions (live fluid systems) using a carbonate reservoir core. The results indicated that the profiles of oil recovery and differential pressure (dP) would be significantly affected by injection rate scenarios in non-water wet systems. The outcome of co-history matching could indicate that, one set of relative permeability and capillary pressure curves can reproduce the experimental data for all corefloods.

Original languageEnglish
Pages (from-to)483–501
Number of pages19
JournalTransport in Porous Media
Volume125
Issue number3
Early online date28 Jul 2018
DOIs
Publication statusPublished - Dec 2018

Keywords

  • Capillary pressure
  • Coreflooding
  • History matching
  • Relative permeability
  • Water injection

ASJC Scopus subject areas

  • Catalysis
  • Chemical Engineering(all)

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