Title: Numerical simulation and three-phase pressure transient analysis considering capillary number effect – case study of a gas condensate reservoir

Authors: Kambiz Davani; Shahin Kord; Omid Mohammadzadeh; Jamshid Moghadasi

Addresses: Ahwaz Faculty of Petroleum, Petroleum University of Technology, Ahwaz, Khuzestan, Iran ' Ahwaz Faculty of Petroleum, Petroleum University of Technology, Ahwaz, Khuzestan, Iran ' DBR Technology Center – Schlumberger, Edmonton – AB, Canada ' Ahwaz Faculty of Petroleum, Petroleum University of Technology, Ahwaz, Khuzestan, Iran

Abstract: When the wellbore pressure drops below the dew point pressure of gas in a gas condensate reservoir, there is the possibility of condensate bank build-up and wellbore blockage. These adverse processes result in development of different mobility zones around the wellbore which complicates the pressure transient test analysis. The focus of this study is on the analytical and numerical analysis of pressure testing data obtained from a well in a target gas condensate reservoir. First, the well test data were analytically interpreted through which several well and reservoir parameters were identified such as condensate bank radius, gas effective permeability, mechanical skin and skin due to non-Darcy flow. A three-phase compositional reservoir model was then built using the analytical solution, for numerical analysis of the pressure transient data as well as validation of the analytical results. This numerical model was then used to estimate well deliverability and predict future reservoir performance. [Received: August 17, 2018; Accepted: March 15, 2019]

Keywords: gas condensate reservoir; well testing analysis; condensate dropout; numerical simulation.

DOI: 10.1504/IJOGCT.2020.110387

International Journal of Oil, Gas and Coal Technology, 2020 Vol.25 No.3, pp.258 - 291

Received: 17 Aug 2018
Accepted: 15 Mar 2019
Published online: 19 Oct 2020 *

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