EOR Engineering UAE — Enhanced Oil Recovery Project Guide 2026

Introduction

EOR engineering in UAE and Oman now generates more active project spend than any other single discipline in the upstream sector. Enhanced oil recovery projects — polymer flooding, gas injection, steam injection, and miscible flooding — are the primary mechanism for maintaining production from mature fields across ADNOC’s Abu Dhabi assets and PDO’s Oman concession.

Understanding what EOR engineering projects specifically require helps operators, EPC contractors, and project developers select the right engineering and procurement partners before committing capital. Therefore, this guide covers EOR engineering scope, project types, and procurement considerations in the UAE and Oman context.

Why EOR Engineering Matters Now in UAE and Oman

Mature oil fields decline naturally as reservoir pressure drops. However, primary recovery typically extracts only 20–35% of oil in place. EOR engineering applies secondary and tertiary methods to recover additional oil — often extending field life by decades.

In the UAE, ADNOC’s EOR programme targets long-term production maintenance across Abu Dhabi’s supergiant fields. Additionally, PDO in Oman operates the world’s largest polymer chemical EOR project at Marmul — a field where polymer flooding has delivered consistent production gains since commissioning. Furthermore, PDO’s EOR programme extends across steam injection at the Qarn Alam field, miscible gas injection at Harweel, and water injection at multiple Oman concession fields.

As a result, EOR engineering project activity across UAE and Oman is among the most sustained capital project categories in the Middle East.

EOR Engineering Types — UAE and Oman Applications

Water Injection Engineering

Water injection replaces the reservoir pressure depleted by produced fluids. It is the most widely applied EOR method in UAE and Oman fields. Engineering scope includes water treatment facilities (deoxygenation, filtration, biocide injection), injection pumps and manifolds, distribution pipelines, and wellhead injection trees.

Moreover, for offshore UAE applications, water injection systems often use seawater with specific treatment to prevent formation damage and scaling. Therefore, water treatment engineering is a critical component of offshore UAE EOR projects.

Polymer Flooding Engineering

Polymer flooding viscosifies the injected water, improving sweep efficiency in reservoirs with viscous oil. Oman’s Marmul field applies polymer injection extensively — the scheme has produced significant incremental recovery. Additionally, alkaline-surfactant-polymer (ASP) pilot tests at Marmul have delivered 30% production uplift above target.

EOR engineering for polymer flooding includes polymer mixing and injection facilities, polymer dilution systems, and produced water handling for polymer recovery. Furthermore, polymer injection wellheads require specific completion design to handle the polymer fluid without equipment damage.

Gas Injection EOR Engineering

Gas injection maintains reservoir pressure and improves mobility of oil in the reservoir. PDO uses miscible gas injection at the Harweel field cluster. Petrofac delivered the Marmul gas compression EPC contract specifically to support gas injection EOR. Additionally, ADNOC applies CO₂ injection for EOR at specific Abu Dhabi fields — a scheme that also delivers carbon storage benefits.

EOR engineering for gas injection includes compression facilities, gas treatment, injection wellheads, and subsurface completion design. As a result, gas injection EOR engineering overlaps significantly with the gas compression engineering scope.

Steam Injection Engineering

Thermal EOR using steam injection applies to heavy oil reservoirs where heat reduces oil viscosity to allow flow to the wellbore. PDO’s Qarn Alam steam injection project — a major Oman EOR installation — uses a steam generation facility producing 18,000 tonnes per day of steam. Therefore, steam injection EOR engineering is among the most capital-intensive EOR applications.

EOR Engineering — Procurement Challenges

EOR projects present specific procurement challenges that distinguish them from conventional oil and gas project procurement:

Specialist polymer chemical sourcing. Polymer flooding requires large quantities of polyacrylamide polymer — a specialty chemical with a limited approved supplier base. Therefore, procurement requires early supplier qualification and long-term supply agreements. Furthermore, PDO’s material specifications for polymer must be met exactly — substitution is not accepted.

Injection pump packages. High-pressure injection pumps — centrifugal or reciprocating, depending on flow rate and injection pressure — have significant lead times. Additionally, for sour injection service, materials must meet NACE MR0175 requirements throughout. As a result, early procurement engagement with pump OEMs is essential.

Wellhead equipment for high-pressure injection. EOR injection wellheads operate at higher pressures than production wellheads. For gas injection applications in Oman, wellhead equipment may need to withstand pressures up to 660 bar. Therefore, wellhead procurement requires specific API 6A high-pressure ratings and material qualification.

EOR Engineering UAE and Oman — PetroSpan’s Position

PetroSpan provides FEED and detail engineering and procurement management for EOR-related project scopes across UAE and Oman. Our engineering team has direct experience with ADNOC and PDO project standards. Furthermore, our procurement network covers the key EOR equipment categories — polymer injection packages, compression equipment, injection pump packages, and wellhead systems.

As discussed in our FEED engineering guide, EOR FEED studies require specific process simulation of injection system thermodynamics alongside reservoir performance modelling. Therefore, our FEED capability directly supports EOR project front-end development.

Contact PetroSpan or submit your EOR project RFQ.

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