Combustion in miscible displacement for high-pressure air injection

Journal Article (2020)
Author(s)

N. Khoshnevis Gargar (Deltares)

J Bruining (TU Delft - Reservoir Engineering)

M. A.Endo Kokubun (University of Bergen and Bjerknes Centre for Climate Research)

Dan Marchesin (Instituto Nacional de Matemática Pura e Aplicada - IMPA)

A. A. Mailybaev (Instituto Nacional de Matemática Pura e Aplicada - IMPA)

Research Group
Reservoir Engineering
DOI related publication
https://doi.org/10.1007/s10596-020-09977-y
More Info
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Publication Year
2020
Language
English
Research Group
Reservoir Engineering
Issue number
4
Volume number
24
Pages (from-to)
1663-1672

Abstract

This paper describes miscible displacement upon air injection in a porous medium saturated with oil corresponding to conditions of high-pressure air injection (HPAI). We assume that injection fluids and produced fluids are fully miscible with the oil at the prevailing high pressure. We use three pseudo-components, viz., oxygen, oil, and an inert component, which includes nitrogen, carbon dioxide, etc. To model the fingering instabilities, we follow a similar procedure as proposed by Koval (SPE J. 3(02):145–154, 1963) and include the reaction between oxygen and oil in the Koval model. The equations are solved numerically, using a finite element software package (COMSOL). The results show that a combustion wave is formed. We study the performance at low and high viscosities and show that the reaction improves the speed and degree of recovery at later times.

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