Welcome to COREX

Corex News

Premier appoints new CEO
Premier Expands Completion Workflows with NSI Technologies Acquisition

Our Services

Enhanced Oil Recovery,EOR/Improved Oil Recovery, IOR Services

Integrated Enhanced Oil Recovery Studies

There are various definitions and techniques for Enhanced Oil Recovery (EOR) and Improved Oil Recovery (IOR) for reservoir optimisation. In the most accepted definition EOR refers to the process of producing hydrocarbons in an oil field by methods other than the conventional use of reservoir energy and reservoir re-pressurizing schemes, e.g displacement of oil by miscible gas or water soluble chemicals. Improved Oil Recovery (IOR) covers a wider range of activity and refers to any processes that promote reservoir performance e.g. well stimulation and water control processes. On the average, conventional production methods will produce about 30% of the initial oil in place from an oil reservoir. The remaining oil, with valuation of nearly 70% of the initial resource, is a large and attractive target for Enhanced Oil Recovery, (EOR) activities.

In the recent years, the interest in application of Enhanced Oil Recovery techniques (EOR), Improved Oil Recovery (IOR),  Enhanced Gas Recovery and, Improved Gas Recovery,  has significantly increased. This is due to the fact that most of mature oilfields in the world need EOR and IOR treatment to maintain their production and a large number of new discoveries require EOR/IOR activities from early stages to meet required production level. Application of EOR/IOR techniques brings about new opportunities for the industry and at the same time new challenges that need to be addressed by laboratory studies.

Due to technology diversity and different development level of Enhanced Oil Recovery Techniques, and Improved Oil Recovery methods, evaluation and selection of suitable EOR and IOR scenarios is generally complicated and requires good understanding of EOR/IOR techniques as well as reservoir characteristics & optimisation.  

Within the COREX EOR lab and IOR team, our aim is to answer industry requirement by designing and performing laboratory experiments and providing consultancy services, we also provide Integrated Reservoir Solutions bringing in the best of Advanced SCAL, Formation Damage and any other solution required to optimist the EOR Study.  COREX experience of Enhanced Oil Recovery and Improved Oil Recovery studies goes back to 1986 when the first core-flood rig for Carbon Dioxide (CO2) injection studies was designed and built. COREX have continuously expanded its EOR/IOR capabilities since then and provide both laboratory and consultancy services for different EOR/IOR technologies.

A successful EOR and IOR study requires understanding of the nature of the EOR/IOR techniques as well as reservoir characteristics. These studies are usually commissioned for the Petrophysicist, Geologist, Reservoir Engineer or Production Engineer on  exploration wells, injection wells, unconventional reservoirs, heavy oil wells, carbonate reservoirs, fractured carbonate reservoirs, tight gas reservoirs, deep water reservoirs, or mature wells as part of field planning or development strategies for production enhancement and reservoir optimization.

COREX Improved Oil Recovery, services are carried out in our Enhanced Oil Recovery Laboratory (EOR Lab) and Stimulation Laboratory (Stim Lab) comprises of various laboratory tests of primary, secondary and tertiary methods.

To design a suitable EOR program thus maximising reservoir optimisation, it is essential to understand the oil trapping mechanisms, reservoir rock propetries at both micro and macro scales. In COREX, the ‘Fluid Flow and Displacement Tests’ (Core-flood or Slim-Tube) will to be supported by our experts in PVT (Pressure Volume Temperature), SCAL, geology and formation damage teams, who provide expertise and interdisciplinary consultancy to prepare the data results for Integrated Reservoir Studies including geological studies, dynamic simulation studies and feasibility studies to provide a guideline for pilot test and field application.


For further information regarding our Enhanced Oil Recovery Laboratory, (EOR lab) and Improved Oil Recovery, (IOR) Services please contact our EOR/IOR expert at: eor@corex.co.uk or our technical sales team at: sales@corex.co.uk

Corex: UK, United Kingdom, Europe, Egypt, Abu Dhabi, Libya, Kazakhstan

PVT Tests and Fluid Modelling

PVT tests and Fluid Characterization: PVT analysis provide basic information for any EOR/IOR studies but their role is critical for processes that involve gas (miscible and immiscible) and solvent injection. Advanced PVT studies are also required for Asphaltene and Wax stability studies and should be performed prior to fluid flow tests. Fluid characterization tests for selection of optimum composition and concentration are required for any chemical injection processes.

Core Analysis and SCAL Studies

SCAL Studies: The displacement tests are required to be supported by conventional SCAL studies if the selected EOR/IOR process promotes recovery through wettability alteration or relative permeability modification e.g. chemical injection or smart waterflood.

Formation Damage Analysis and Testing

Formation Damage and Flow Assurance Analysis: Formation damage studies are required for any planning or design of EOR/IOR processes. Some processes might efficiently promote oil recovery but block the near wellbore region or lack compatibility with well and surface facilities. This include processes like CO2 injection, chemical injection etc.

Advanced Geology Studies

Advanced Geology Studies: Advanced geology studies provide valuable data for EOR/IOR processes that are sensitive to rock lithology e.g. chemical injection, smart waterflood and CO2 injection.

Feasibility Studies

Fluid Flow and Displacement Tests: Fluid flow and displacement tests are the most crucial part of EOR/IOR studies that can physically simulate fluid flow in real reservoir conditions. These tests are performed using high pressure and high temperature rigs that are specifically designed for this purpose. The porous media might be real reservoir core or sand pack depending on the test requirements and. The rock and fluid will be analyzed before and at the end of the test by different analytical techniques. The fluid flow and displacement tests provide data on displacement efficiency, recovery and trapping mechanisms, performance of selected EOR/IOR process, etc.

Pilot Tests

Pilot Test Services: COREX provide consultancy on design and planning of EOR/IOR pilot tests, fluid preparation and rock and fluid sampling.

Feasibility Studies

Feasibility Studies: COREX provide consultancy services on technical design and selection of EOR/IOR processes based on reservoir characteristics and production history. This includes the design of theoretical and laboratory studies and preparation of field implementation plan.

Dynamic Simulation Studies

Dynamic Simulation Studies: The results of displacement tests are generally modelled using numerical simulators to understand if existing rock and fluid data can predict the performance of EOR/IOR process. The rock and fluid data then can be modified to precisely simulate the displacements process and the involved mechanisms. The modified data will be used to predict field performance as part of consultancy services provided by COREX.

Enhanced_Oil_Recovery_EOR__Emulsion_Stability_Study.jpg  Enhanced_Oil_Recovery_EOR__Chemical_and_Brine_Compatibility_Studies.jpg

 COREX provide high quality EOR/IOR services for following processes:

  • Core Flood Testing
  • Surfactants
  • Mobility & Mobility Control
  • Immiscible & Miscible Process Control
  • Gas Injection, Water Alternating Gas Control (WAG)
  • Simultaneous water & Gas Injection (SWAG)
  • Water Flooding
  • Low Salinity Waterflood Injection
  • Steam Flooding
  • Reservoir Fluid Analysis
  • Low Salinity Injection
  • Nitrogen Injection
  • Nanotechnology, nano particles
  • Polymer-Gel design
  • Hydrogen Sulphide (H2s)
  • Stimulation Fluid Testing
  • Field Floods
  • Case Studies
  • Foam Injection
  • Steam Injection
  • Hydrophilic Nanoparticles
  • Completion Products Diagnostics
  • Reservoir Stimulation
  • Drilling and Stimulation Properties
  • CO2 injection studies
  • Asphaltene/Wax stability
  • Flow Studies
  • Precipitation Studies
  • Alkaline
  • Miscible and immiscible gas injection
  • Waterflood optimisation
  • Chemical design for Alkaline/Surfactant/polymer

Quick Enquiry Form

Follow COREX

Follow COREX by clicking on the icons below.