Experiments and analysis of imbibition in carbonates

R. A. Anderson, N. A. Al-Ansi, M. J.B. Blunt

Research output: Contribution to conferencePaper

Abstract

With around half the world's remaining conventional oil contained in fractured carbonate reservoirs, it is important that the fundamentals of the transfer of fluids from fracture to matrix are understood We present the results of an extensive series of spontaneous imbibition ambient-condition experiments on three carbonate cores of different length, designed to test recent theoretical models of imbibition We study the displacement dynamics, from an initial square-root-of-time recovery to an exponential relaxation to residual saturation as the wetting from reaches the end of the core We also quantify the effect of pore structure in highly heterogeneous systems The scaling models presented by Ma et al (1995), Li and Home (2004), and Schmid and Geiger (2012) were tested on the experimental data Schmid and Geiger's correlation was found to be the most reliable The recovery, as a function of dimensionless time, could be fitted with the mass transfer function proposed by Aronofsky et al (1958) and the analytical oil recovery solution presented by Tavassoli et al (2005) The work suggests that recent correlations for transfer rates in the literature, combined with benchmark experimental results, can be used as a reliable technique to help predict field-scale recovery rates in fractured reservoirs.

Original languageEnglish
Publication statusPublished - 1 Jan 2013
Event17th European Symposium on Improved Oil Recovery, IOR 2013 - Saint Petersburg, Russian Federation
Duration: 16 Apr 201318 Apr 2013

Other

Other17th European Symposium on Improved Oil Recovery, IOR 2013
CountryRussian Federation
CitySaint Petersburg
Period16/4/1318/4/13

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ASJC Scopus subject areas

  • Environmental Science (miscellaneous)

Cite this

Anderson, R. A., Al-Ansi, N. A., & Blunt, M. J. B. (2013). Experiments and analysis of imbibition in carbonates. Paper presented at 17th European Symposium on Improved Oil Recovery, IOR 2013, Saint Petersburg, Russian Federation.