A Greenfield CAPEX Reduction Case Study

Challenge: A greenfield subsea development operator required a full subsea design, including subsea production and processing equipment, in order to make the asset economically viable in the low oil price environment.

Pore to Process Approach: OneSubsea’s unique capability of bringing together subsea production and boosting systems experts as one project team helped reduce project risk, as the team of experts in both domains worked together to provide an optimal integrated subsea development solution. The synergy of having one team and one contract delivered further economic benefits that would not have been achieved had the client split the contract between two separate companies.

OneSubsea Solution: After collaborating with the client and understanding the subsea field development current specifications, the OneSubsea project team was able to recommend a solution that eliminated some of the hardware scope and adjusted the installation contract. Further, by offering a standardized subsea tree design with the rental tooling, the entire CAPEX reduction achieved for the client was in excess of $230 million.

A Greenfield Artificial Lift Screening and Hardware Assessment

Challenge: An operator was interested in assessing various artificial lift options for a given subsea field development plan to determine the impact on production, hardware and economics.

Pore to Process Approach: OneSubsea's team of experts came together to integrate reservoir and network models into an integrated asset model of the field. The team was able to quickly simulate and evaluate the effect on production when the following artificial lift methods were employed on the field: in-well gas lift, ESPs, multiphase boosting, and a combination of the three methods. This model was then used to identify cost reduction opportunities in the subsea production system.

OneSubsea Solution: The results of the simulation highlighted that significant production gains could be achieved by adapting the current subsea field development plan to include alternative artificial lift methods. In addition, the simulation identified substantial cost savings through optimizing flowline sizes and reducing reliance on chemical inhibitors.

Enabling Wet Gas Compression for a Large Gas Subsea Greenfield Field Development

Challenge: A gas field customer was interested in assessing the value of subsea wet gas compression on recovery, and ultimately by leveraging this technology, to develop the field subsea.

Pore to Process Approach:Through collaboration on an integrated asset model with the customer, the OneSubsea team demonstrated enhanced recovery from subsea wet gas compression and assessed the MEG dosing and reclamation system/

OneSubsea Solution: The results of the study nearly doubled the time on plateau and dramatically increased recovery. The application of subsea wet gas compression provided flexibility and reduced the MEG dosing requirements which minimized the MEG reclamation investment. The decision to develop subsea was chosen with over a billion dollars in investment savings.