Parametric study of gas condensate flow in naturally fractured reservoirs

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

Abstract

Naturally fractured carbonate reservoirs (NFRs) are usually characterized by complex pore systems that significantly affect the rock flow properties. Such reservoirs gained a wide interest and intensive research in the petroleum industry due to the challenges it poses in term of reservoir performance modeling. The presence of retrograde fluid in gas condensate systems, when the pressure drops below dew point, adds further complexity to the performance of NFRs. There are limited publications dealing with gas condensate flow in NFRs and the impact of variation of relative permeability with velocity and interfacial tension have so far not been studied. In this work dual porosity option of the ECLIPSE 300 compositional reservoir simulator, which includes our in-house relative permeability (kr) correlation accounting for the positive coupling (increase in kr by an increase in velocity and/or decrease in interfacial tension) and the negative inertial (decrease in kr by an increase in velocity) effects, has been used to conduct a series of sensitivity analysis on a single-well model. The impact of pertinent parameters; including fracture width, fracture relative permeability, fluid richness, coupling and inertia have been studied. The effect of critical condensate saturation on final recovery due to gravity drainage mechanism was also studied. The results demonstrated that positive coupling seemed to be more dominant in our study. Also, assigning unrealistic high critical condensate saturation could lead to significant underestimation of condensate recovery, especially in gravity dominated conditions. Nevertheless, the use of straight line relative permeability could lead to numerous errors in performance prediction. Copyright 2009, Society of Petroleum Engineers.

Original languageEnglish
Title of host publicationSociety of Petroleum Engineers - Kuwait International Petroleum Conference and Exhibition, KIPCE 2009: Meeting Energy Demand for Long Term Economic Growth
Pages438-450
Number of pages13
Publication statusPublished - 2009
EventKuwait International Petroleum Conference and Exhibition, KIPCE 2009: Meeting Energy Demand for Long Term Economic Growth - Kuwait City, Kuwait
Duration: 14 Dec 200916 Dec 2009

Conference

ConferenceKuwait International Petroleum Conference and Exhibition, KIPCE 2009: Meeting Energy Demand for Long Term Economic Growth
CountryKuwait
CityKuwait City
Period14/12/0916/12/09

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  • Cite this

    Alajmi, S. E., Jamiolahmady, M., & Sohrabi Sedeh, M. (2009). Parametric study of gas condensate flow in naturally fractured reservoirs. In Society of Petroleum Engineers - Kuwait International Petroleum Conference and Exhibition, KIPCE 2009: Meeting Energy Demand for Long Term Economic Growth (pp. 438-450)