Modelling of cyclic hysteresis of three-phase relative permeability during water-alternating-gas (WAG) injection

Hamid Reza Shahverdi, Mehran Sohrabi Sedeh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Multiphase flow takes place in many petroleum reservoirs in particular mature fields and reservoirs under fluid (e.g., gas, WAG) injection. The numerical simulation of such reservoirs requires knowledge of flow functions (i.e. relative permeability and capillary pressure). Since experimental measurement of fluid permeabilities in particular under three-phase flow conditions is very time consuming and difficult, many correlations and models have been developed and are widely used instead of measured data. In this study, we have used the results of a comprehensive set of water-alternating-gas (WAG) injection coreflood experiments performed under different wettability conditions and core permeability values in order to obtain relative permeabilites of oil, water and gas under reservoir pressure and temperature. Three-phase relative permeability of each phase was obtained by history matching the measured production and differential pressure obtained in the laboratory. The results of the experiments revealed significant cyclic hysteresis effects in gas and oil relative permeability. We proposed new formulations and methodology for modelling of cyclic hysteresis of three-phase relative permeability during WAG injection. This technique is a direct method which uses measured three-phase kr data obtained from first cycle of WAG to predict the relative permeability of the subsequent cycles. The integrity of this technique has been validated against the three-phase kr data obtained from our WAG experiments We also assess the validity of the WAG hysteresis model available in reservoir simulators against our three-phase relative permeability data in order to evaluate its performance.

Original languageEnglish
Title of host publicationProceedings - SPE Annual Technical Conference and Exhibition
Subtitle of host publication(ATCE 2013)
Place of PublicationRichardson, Texas
PublisherSociety of Petroleum Engineers
Pages5232-5253
Number of pages22
Volume7
ISBN (Electronic)9781613992401
ISBN (Print)9781629931876
DOIs
Publication statusPublished - 2013
EventSPE Annual Technical Conference and Exhibition 2013 - Louisiana, New Orleans, United States
Duration: 30 Sep 20132 Oct 2013

Conference

ConferenceSPE Annual Technical Conference and Exhibition 2013
CountryUnited States
CityNew Orleans
Period30/09/132/10/13

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  • Cite this

    Shahverdi, H. R., & Sohrabi Sedeh, M. (2013). Modelling of cyclic hysteresis of three-phase relative permeability during water-alternating-gas (WAG) injection. In Proceedings - SPE Annual Technical Conference and Exhibition: (ATCE 2013) (Vol. 7, pp. 5232-5253). Society of Petroleum Engineers. https://doi.org/10.2118/166526-MS