[Australia] Dorado

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escveritas
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[Australia] Dorado

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Santos launches Dorado FEED

Santos today announced the launch of Front-End Engineering and Design (FEED) for the Dorado project in the Bedout Sub-basin, offshore Western Australia.

Dorado is an integrated oil and gas project which is planned to be developed in two phases. Phase 1 development involves the production of oil and condensate through a well head platform (WHP) and floating production, storage and offloading facility (FPSO). Phase 1 has an estimated gross capital cost of approximately US$2 billion, assuming a purchased FPSO.

The selected concept of a FPSO and WHP allows for the optimal integrated development of both the gas and liquids resource and retains sufficient flexibility to support future exploration success. Gas will be reinjected in the initial phase to enhance oil and condensate recovery.

Phase 2 will then develop the significant natural gas resources in the Bedout Sub-basin and provide future backfill supply to Santos’ current WA domestic gas infrastructure assets.

Santos Managing Director and Chief Executive Officer Kevin Gallagher said Dorado is expected to have an initial gross oil production rate of between 75,000 to 100,000 barrels per day of high-quality crude that is expected to earn a premium to regional pricing benchmarks.

“Entering FEED for the Dorado project is a significant milestone and has the project on schedule for a final investment decision around mid-2022, building on the investment decision on the Barossa gas project earlier this year,” Mr Gallagher said.

“Dorado is on track to be the first development in the Bedout Sub-basin, with its high-quality reservoirs and shallow-water setting, making it a very cost-competitive project globally.

“Dorado is also a very low CO2 reservoir with approximately 1.5 per cent CO2, and with all gas reinjected in the initial phase, making it one of the lowest emission intensity oil projects in the region.

“After the initial phase of liquids production, gas export from the development allows for a future source of supply into our domestic gas infrastructure in Western Australia.

“Potential nearby tie-in opportunities, starting with the Pavo and Apus prospects to be drilled early next year, could be easily tied-back into the Dorado infrastructure and materially increase the value of the project, due to the very low cost of development,” Mr Gallagher said.

FEED contracts for the FPSO and WHP design are being finalised and are expected to be awarded over the next few months. This follows the competitive pre-FEED phase of the project where top-tier contractors have been engaged for these major work packages.

Santos has an 80 per cent interest in the Dorado project and is operator. The remaining interest is held by Carnarvon Petroleum.

Santos is currently undertaking a process to seek interest from the market in non-operated equity in Dorado and potentially other WA oil assets.
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Re: [Australia] Dorado

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Santos today announced award of the FEED contract for the Floating Production, Storage and Offloading (FPSO) facility for the Dorado project, in the Bedout Sub-basin, offshore Western Australia, to Altera Infrastructure (Altera).

The FPSO contract is the project’s largest, comprising engineering, procurement, construction, installation, commissioning and testing of the facility.

Dorado is an integrated oil and gas project which is planned to be developed in two phases. The initial development involves the production of oil and condensate through a well head platform (WHP) and FPSO. Gas will be reinjected in the initial phase to enhance oil and condensate recovery, followed by a planned future phase of gas production to backfill Santos’ domestic gas infrastructure in WA.

Dorado is a very low CO2 reservoir with approximately 1.5 per cent CO2 and reinjection of gas in the initial phase, making it one of the lowest emission intensity oil projects in the region.

In June, the project entered the Front-End Engineering and Design (FEED) phase, which involves numerous work-fronts including the award of contracts for the FPSO and WHP. The FPSO contract will commence with full definition engineering by Altera to confirm the technical requirements for the FPSO and associated disconnectable mooring system.

Santos Managing Director and Chief Executive Officer Kevin Gallagher said: “This contract is an important milestone for the project and Altera brings extensive FPSO design and operations expertise to the development.

“The FPSO design will provide for the integrated development of both the liquids and the gas resource and retains sufficient flexibility to support future nearby exploration success. A contract for the design, supply and installation of the WHP will be awarded soon.”

President, Altera Infrastructure Production Chris Brett said: “We thank Santos for putting their confidence in Altera and are eager to apply our over 30 years of FPSO competence and experience during FEED to deliver an FPSO design that meets the needs of the Dorado development while also bringing forward the latest emission reducing solutions in line with our vision to lead the industry to a sustainable future.”

The project has a Federal Government approved Australian Industry Participation Plan ensuring full, fair and reasonable opportunities for Australian industry to compete for work. This is accessible via the Industry Capability Network website.

Santos has an 80 per cent interest in the Dorado project and is operator. The remaining interest is held by Carnarvon Petroleum.
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Re: [Australia] Dorado

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The Dorado field is an important development in the Australia energy landscape consisting of 150 mmbbls+, it was discovered in 2018 as part of the greater Phoenix exploration. The Dorado project development FEED is now substantially complete with facilities being designed for production of 75,000 to 100,000 barrels per day.

However, Carnarvon Energy Ltd has postponed the Dorado FID beyond 2022 citing inflationary cost environment and supply chain uncertainties.

The main outstanding matter is the finalisation the Engineering Procurement and Construction (“EPC”) contract for the Floating Production Storage and Offloading (“FPSO”) vessel which represent almost 50% of the total CAPEX.

The FPSO wil have a design capacity to process 100,000 barrels of oil per day, along with 215 million scf/day of gas injection and storage for around 1 million barrels of oil & condensate.
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Re: [Australia] Dorado

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Acceptance of the Santos WA Northwest Pty Ltd Dorado Development Offshore Project Proposal

Date: 10 February 2023

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The National Offshore Petroleum Safety and Environmental Management Authority (NOPSEMA) provides the following Statement of Reasons for its decision to accept the Dorado Development Offshore Project Proposal (OPP), in accordance with regulation 5D of the Offshore Petroleum and Greenhouse Gas Storage (Environment) Regulations 2009 (the Environment Regulations).

On 10 February 2023, NOPSEMA decided pursuant to regulation 5D(5)(a) of the Environment Regulations to accept the Dorado Development OPP.

The proponent intends to develop and produce oil from the Dorado field which is part of the Bedout Sub-basin approximately 140km offshore from Port Hedland in Western Australia and is within petroleum titles WA-437-P and WA-438-P (Phase 1). Phase 1 will include:
a. a wellhead platform (WHP) with up to sixteen wells (production and gas injection);
b. a floating production, storage and offloading (FPSO) facility;
c. subsea flowlines and umbilicals between the WHP and the FPSO facility; and
d. potential future tie-backs.

Any future tie-backs will connect back to the WHP and FPSO. Recovered gas will be reinjected to the Dorado reservoir to enhance oil recovery.

NOPSEMA considered the project summary in the OPP, including the description of the facilities that are proposed to be used to undertake each activity, and found there is a clear description of facilities.

For example:

a. The WHP (and up to two other WHPs for potential future tie-backs) will be positioned over the Dorado field. They will be designed as not normally crewed platforms that are remotely powered and operated from the FPSO facility. The WHP will be a steel substructure that will accommodate 16 slots for production and gas reinjection wells with associated instrumentation, gathering manifolds and metering of production fluids.

b. Up to 38 wells may be drilled at the Dorado oil field, being a combination of oil and gas development wells and gas reinjection wells. These will be comprised of up to 16 wells on the WHP (six oil production, two gas production, two gas reinjection, and up to six additional wells that are a combination of production and gas reinjection wells), and up to 22 wells for potential future tiebacks.

c. Initially, 10 wells will be drilled and completed using a jack-up mobile offshore drilling unit (MODU). Production wells for potential future tie-backs may be drilled with either a semi-submersible or jack-up MODU, depending on water depth.

d. For the WHP and FPSO facility, the subsea system will consist of flowlines (initially two hydrocarbon production flowlines and one gas reinjection flowline), risers and an umbilical. The flowlines will transport production fluids from the WHP to the FPSO facility and will transport reinjection gas
from the FPSO facility to the WHP. The umbilical will transfer electrical signals, hydraulic fluids, chemicals and communication signals to wellheads and other equipment requiring remote control from the FPSO facility.

e. The FPSO facility will be located approximately 2.2km from the WHP and will enable the production fluids to be processed and exported periodically from the Project Area. The export of product from the FPSO facility is expected to occur up to once a week during the initial stages of production, before transiting to a less frequent schedule.

f. The FPSO facility will be double hulled and have a disconnectable turret mooring (DTM) system to allow the FPSO facility to move away from the field under its own power if required (such as during adverse weather conditions and planned and unplanned maintenance requirements). Prior to the DTM arriving on site, some or all the anchor piles may be pre-laid using support vessels. Pre-laid anchors will be connected to the DTM mooring lines on arrival with the tension of the mooring lines being adjusted into the required position. The FPSO facility will have thrusters for positioning
under offloading conditions.
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