OneSubsea inks Shell Stones deal

UK supermajor Shell awarded OneSubsea a contract to supply subsea services for the Stones ultra deepwater development project in the Gulf of Mexico. 

An artist's impression of the Stones FPSO. From SBM Offshore.

Stones is located 200mi southwest of New Orleans, Louisiana at about 9500ft water depth, with a reservoir depth of around 26,500ft below sea level. The field encompasses eight US Federal Outer Continental Shelf lease blocks in the Gulf of Mexico’s Lower Tertiary geologic trend.

Upon the terms of the agreement, OneSubsea will supply subsea processing systems, which includes a dual pump station with two 3 Mw single-phase pumps and two subsea control modules, a topside power and control module, a barrier-fluid hydraulic power unit with associated spares as well as installation and maintenance tools.

The award, which follows a Technology Qualification Program, will deliver the industry’s first 15,000-psi subsea pump system, to be installed in the Gulf of Mexico at approximately 9500ft (2900m), OneSubsea said.

"This boosting technology will be key for enhancing recovery and increasing production from the ultra deepwater environment in the lower tertiary region of the Gulf of Mexico,” Jack Moore, Cameron chairman and CEO said.

OneSubsea’s system will be tied back to the Stones floating production, storage, and offloading (FPSO). Manufacturing and testing will take place at OneSubsea’s processing center facility in Horsøy, Norway, with an expected delivery from Horsøy in early 2018.

Production from Stones’ first phase of development is slated to begin next year, which will start with two subsea production wells tied back to a FPSO host vessel, followed at a later phase by six additional wells with multiphase pumping. The oil and gas development will host the deepest production facility in the world, Shell said.

Stones is estimated to have a peak production of 50,000 boe/d in the first phase of development, from more than 250 MMboe of recoverable resources. According to Shell, the Stones field has significant upside potential and is estimated to contain over 2 billion boe of oil in place.

Shell operates Stones with 100% interest.

Read more:

Spotlight on the Gulf

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