Offshore engineering consultancy Intecsea, a Worley group company, has partnered with The Oil and Gas Technology Centre (OGTC) to fund prototype testing of its Pseudo Dry Gas (PDG) liquid removal system.

The technology was developed to make long distance subsea tiebacks commercially viable by reducing back pressure in pipelines, allowing for greater tie-back distances and eliminating the need for costly topside processing equipment.

OGTC marginal developments project manager Graeme Rogerson said: “There are over 360 marginal developments in the UK Continental Shelf, with approximately three to 50 million barrels of untapped oil and gas.

“Technology development is key to unlocking this potential and why we are excited to support Worley’s INTECSEA in developing its Pseudo Dry Gas system, improving reserves recovery while reducing the industry’s carbon footprint.”

The prototype testing is based on an OGTC-funded techno-economic concept study completed in March 2019. INTECSEA said the PDG system demonstrated “unparalleled recovery levels” and provided an additional $10bn in revenue over alternatives and reduced CO2 emissions by 65-80%.

Another application for the technology that was studied as part of the OGTC’s original scope was gas disposal in small oil pool developments. This additional application could offer benefits for in normally unmanned facilities through the removal of topside gas processing equipment.

The project has gained wider industry support following these studies, including a six-inch prototype of the liquid removal unit which will be tested over six months at Cranfield University.

INTECSEA PDG technology engineering lead Lee Thomas said: “The solution is elegantly simple; it uses multiple passive liquid removal units and a liquid disposal pipeline connected to proven standardized pumps.

“I am delighted that the OGTC’s funding will allow us to move from computer-based simulations, through to physical testing, with a diverse range of Operators and Tier 1 contractors, demonstrating industry collaboration at its best.”

INTECSEA and the OGTC are seeking an operator willing to undertake a pilot project of the unit across a range of applications.