Australia’s Karoon Energy is on track to start-up its Patola oilfield on the BM-S-40 production licence offshore Brazil in the first quarter of 2023.

Karoon has successfully drilled PAT-2, the second of two new production wells on Patola, with the semi-submersible rig Noble Developer.

The operator said that like the PAT-1 production well, PAT-2 encountered high quality Oligocene turbidite sandstones close to the prognosed depth, and preliminary interpretation of wireline log data has indicated net pay thickness in line with pre-drill expectations.

Reservoir quality is better than predicted and closely aligned with PAT-1 and wells in the adjacent Bauna and Piracaba fields, noted Karoon.

“Patola is Karoon’s first development project since taking over as operator of the Bauna concession. The first phase - drilling the wells - has been completed within schedule and budget. Most importantly there have been no material safety or environmental issues, said Karoon chief executive Julian Fowles.

"What’s required now to bring Patola on stream includes completion of both wells, the installation of a subsea pipeline and umbilicals from the field to the Cidade de Itajai floating production, storage and offloading vessel and tying the wells into existing riser slots on the FPSO. Completion of FPSO pipework to tie in the wells into the main production stream will then be performed before the new facilities are commissioned."

“The majority of the materials for the next phase of the development are now either onsite or ready to be shipped to site. Subject to weather and other unforeseen delays, the project is on track to commence production in the first quarter of the 2023 calendar year,” added Fowles.

A short plateau production rate of more than 10,000 barrels per day of oil is expected at Patola, prior to the onset of natural decline.

Following the Patola wells' completion activities, Karoon plans to move the Noble Developer to the Neon field to drill the first of potentially two Neon control wells, subject to regulatory approvals. This drilling campaign is intended to reduce subsurface uncertainty and enable the operator to progress towards taking the final investment decision, Fowles earlier said.

Neon could be exploited as a standalone project or via a 60-kilometre tie-back to the Bauna field. A Neon well flowed at a facility-constrained stabilised rate of 4650 bpd of 39 degrees API crude during testing.

Karoon has 100% operated equity in the BM-S-40 production licence.

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