A ship named after salt cod holds position 115 miles off São Paulo, and the Santos Basin reservoir it drains at 900 bar is the first under Brazil’s salt built from scratch by a foreign operator

The water turns a flat dead indigo about two hours out from the coast.

Then the bottom falls away.

More than a mile under the hull there is seabed, and under the seabed there is rock, and somewhere down in that rock is the reason a vessel the length of four city blocks sits motionless on open ocean.

Another unit moored off the same coast processes 225,000 barrels a day and went on hire in February of the same year, which is a bigger number by any reading.

It does not drift because it cannot.

Twenty mooring lines run off it into the dark, and what they hold it above spent 120 million years under a lid.

What a mile of salt does to a seismic survey

The lid is salt, and there is an extraordinary amount of it.

It went down when this part of the South Atlantic was a shallow sea evaporating in the heat, leaving a sheet that runs more than a mile thick in places.

Salt is a terrible thing to look through.

Sound bends and scatters as it crosses that boundary, so for decades the returns from anything underneath came back distorted into what looked like noise on the record.

Nobody knew what was under there.

Only when three dimensional imaging got good enough to correct for the distortion did operators start to see the shape of it, and what they found was a carbonate reservoir holding light crude at very high pressure.

A floating refinery with a codfish on the bow

The vessel runs 1,214 feet long and 210 feet wide, longer than the Chrysler Building is tall.

It is spread moored in about 6,726 feet of water, the lines arranged in four groups of five, chain and polyester rope running down to suction piles set in the seabed.

Nothing about it is designed to leave.

Rigid risers climb to the deck from roughly 81 miles of flowlines laid across the bottom, and the hull holds a minimum of two million barrels of crude.

Power is the part worth noticing.

Four gas turbines feed two steam turbines in a combined cycle arrangement, recovering exhaust heat that most production vessels simply throw away, and the result is roughly 20 pounds of carbon dioxide per barrel produced.

That is about half the industry average, which for a field this size is not a rounding difference.

The numbers behind the first barrel

The field was found in 2012, out in the Santos Basin, and carried a different name for years before anyone committed money to it.

The investment decision came in June 2021, roughly 8 billion dollars for the first phase, with first oil then targeted for 2024.

It slipped.

The vessel was christened at a Singapore yard in the autumn of 2024, reached the field in February 2025, and produced its first barrel on the evening of 15 October 2025.

Phase one covers 19 wells, producers and injectors both, drilled into a reservoir sitting about three and a half miles below the seafloor.

Topside capacity is 220,000 barrels of oil a day, 530 million cubic feet of associated gas for reinjection, and 200,000 barrels of seawater pushed back down to hold pressure.

Recoverable resources run past a billion barrels. The reservoir itself sits at 900 bar, near 13,000 pounds per square inch.

What this vessel is not

It is not the largest producer in these waters, whatever the launch coverage suggested.

Another unit moored off the same coast processes 225,000 barrels a day and went on hire in February of the same year, which is a bigger number by any reading.

Scale here is relative, and getting more so every year.

Majors have been buying deeper into salt assets off this coast, and the national operator has a next platform lined up for the field next door.

The habitat question is open too.

These waters sit on a humpback corridor between southern feeding grounds and warmer calving bays, and a permanent industrial structure parked in that corridor for nearly thirty years is a long experiment.

Nobody has run it before, and the license does not require anyone to publish what it finds.

Who gets to build under the salt

Here is the part the specifications do not carry.

Every greenfield development in this play until now was built by Brazil’s national oil company, and this one was not, which makes it the first field of its kind delivered from scratch by an international operator.

The consortium is split 40, 40 and 20.

For the American partner holding the second 40 percent, this is first production from the ground in Brazil after more than 110 years of doing business there.

The lease runs a long way out.

The operator is contracted to run the vessel until 2053, which means the machine described above is expected to stay where it is, on those twenty lines, for twenty eight years.

The operator statement has the start and the emissions figure. The vessel page has the specifications.