Aker Solutions and partners have initiated a joint industry project (JIP) that aims to qualify membrane qualities suitable for separation of CO2 and subsea gas process.

The partners include a group of oil and gas (O&G) operators Total, Pertamina and Equinor, and industry group the CO2 Capture Project (CCP). BP, Chevron and Petrobras are the members of CCP.

The partnership will also focus on reducing the requirements for pre-treatment and eliminating the need for large processing modules.

According to Aker, CO2-flooded oil fields have increased recovery rates and extended life that makes them commercially viable.

In a press statement, Aker said: “Aker Solutions has developed new concepts for subsea processing of well streams from CO2-flooded oil fields, in which CO2-rich gas is separated, compressed and reinjected back into the reservoir. The hydrocarbon-enriched gas can then be routed to the topside production facility.”

Currently, the existing qualified operating range for relevant membrane materials barely fits the optimal operating conditions for subsea gas separation, the company noted.

Aker Solutions explained that the project aims to qualify membrane qualities suitable for bulk separation of CO2 in a typical subsea process.

The SINTEF research institute in Norway will carry out testing of different membrane qualities under relevant conditions related to pressure, temperature and gas composition, as well as production rates.

Furthermore, the test results will be used in technical and economic engineering studies to evaluate the concept for offshore CO2 enhanced oil recovery (EOR) with CO2 reinjection and storage.

The company has delivered the world’s first subsea compression system for Equinor’s Åsgard gas field in the Norwegian Sea.

The JIP is supported by funds from Gassnova’s CLIMIT programme, which is intended for research, development and demonstration of carbon capture and storage technologies.