Add Energy completes CO2 injection study for operator in the Asia Pacific region

Add Energy, which is part of Oslo-listed energy and marine consultancy group ABL Group ASA, has successfully completed an operation to assess the suitability of injection wells to be used to store CO₂ from a CCS project in the Asia Pacific region.

“ABL Group has made a commitment that approximately 50 percent of our revenue should come from renewables, sustainability and energy transition activities by 2025. Innovative CCS projects such as this are highly encouraging and a step in the right direction from a strategic viewpoint,” says Dr. R. V. Ahilan, Chief energy transition officer at ABL Group.

Add Energy’s scope of work on this project was to assess well control contingency of CO₂ injection wells to ensure capability of safe workover operations. Over the life of this CCS system, more than 100 million tonnes of CO₂ is expected to be mitigated, with more than 8 million tonnes having been injected to date.

The purpose of the study was to estimate the feasibility and requirements for performing bullheading operations on the injection wells. Bullheading – pumping fluid down the wellbore – is performed during workover operations (before replacing equipment, setting plugs, etc.) to bring the surface pressure down to zero. It can also be performed to re-establish a well barrier against the reservoir pressure as a part of a well kill operation before the final kill is achieved by setting cement plugs.

In connection with the study, Add Energy conducted data evaluation, prepared scenario definitions and shut-in simulations and evaluations. The company also conducted bullheading down the tubing and provided recommendations with sensitivity on failing gas lift valve dummy.

“We have a highly experienced team of well integrity experts that worked to assess the well control contingency of the CO₂ injection wells. The same principles apply to all types of wells, producers or injectors. The operator’s CCS system prevents millions of tonnes of greenhouse gases from being vented into the atmosphere, so we are proud to play a part in this project,” says Morten Haug Emilsen, well control manager at Add Energy.

Add Energy offers 30+ years of operations, drilling and well engineering experience and provides leading solutions in drilling and well operations; safety and risk; decarbonization and energy transition; asset management; and training. Add Energy is part of AGR, multi-disciplinary engineering consultancies and software providers. AGR is part of Oslo-listed ABL Group ASA, an independent energy and marine consultancy group to the global renewables, maritime and oil and gas sectors.