Field Scale Simulation Study of Miscible Water Alternating CO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; Injection Process in Fractured Reservoirs

Mohammad Afkhami Karaei,Shahrokh Bahrami Kashkooli,Jahangir Talebi Bahmanbeglo,Hooman Fallah,Ali Ahmadi

doi:10.4236/gm.2015.51003

Field Scale Simulation Study of Miscible Water Alternating CO&lt;sub&gt;2&lt;/sub&gt; Injection Process in Fractured Reservoirs

Mohammad Afkhami Karaei, Shahrokh Bahrami Kashkooli + Show 3 more

Open Access

https://doi.org/10.4236/gm.2015.51003

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Journal: Geomaterials	Publication Date: Jan 1, 2015
Citations: 2	License type: CC BY 4.0

Affiliation: Islamic Azad University, Arak

Abstract

Vast amounts of world oil reservoirs are in natural fractured reservoirs. There are different methods for increasing recovery from fractured reservoirs. Miscible injection of water alternating CO2 is a good choice among EOR methods. In this method, water and CO2 slugs are injected alternatively in reservoir as miscible agent into reservoir. This paper studies water injection scenario and miscible injection of water and CO2 in a two dimensional, inhomogeneous fractured reservoir. The results show that miscible water alternating CO2 gas injection leads to 3.95% increase in final oil recovery and total water production decrease of 3.89% comparing to water injection scenario.

Highlights

Miscible gas injection is one of the most important mechanisms of enhanced oil recovery from fractured reservoirs
Water alternating gas injection is an effective method for controlling high mobility of gas in horizontal flooding which is used in so many reservoirs around the world and reported as
This means that sweeping efficiency increases after miscible water alternating CO2 gas injection

Summary

Introduction

Miscible gas injection is one of the most important mechanisms of enhanced oil recovery from fractured reservoirs. Thompson and Mungan investigated results of laboratory experiments of gravity drainage in a fractured porous media under first contact miscible conditions. They compared replacement velocity with critical velocity and investigated its effect on oil recovery factor [1]-[5]. (2015) Field Scale Simulation Study of Miscible Water Alternating CO2 Injection Process in Fractured Reservoirs. Immiscible water alternating gas injection in oil reservoirs is not common [2]. Purpose of this study is to compare water injection and water alternative CO2 gas injection and investigation of its effect on recovery factor and water cut from reservoir

Interpreting Reservoir Model

PVT Properties of Reservoir Fluids

Water Injection and Miscible Water Alternating CO2 Gas Injection Simulation

Findings

Conclusions