[Gabon] Dussafu - BW Adolo

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escveritas
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[Gabon] Dussafu - BW Adolo

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The Dussafu Marin Permit and the associated Ruche Exclusive Exploitation Area (EEA) production license are located approximately 50 kilometers off the coast of Gabon.

The Ruche EEA covers an area of approximately 850 square kilometers. The water depth within the Ruche EEA ranges from 70 meters in the northeast corner to 650 meters in the southwest corner. Six oil discoveries have been made on the license to date: Tortue, Hibiscus, Ruche, Ruche North East, Moubenga and Walt Whitman.

The area comprising the Tortue, Hibiscus, Ruche and Ruche NE fields is centrally located within the Ruche EEA, with a water depth of approximately 116 meters.

Oil from Dussafu is a good quality crude that generally trades on an equivalent basis to Brent. The crude is typical of the region and is sweet with an API gravity of 28 to 30 degrees API.

Phase 1 started production on 16 September 2018 and currently has a gross production rate of around 10,700 bopd from two wells at the Tortue Field. Approximately 5.5 mmbbl has been produced as of December 2019. Field uptime since start-up has been 99%, which is industry leading. Phase 2 development at Tortue was sanctioned in late 2018 and is in the execution phase. It will consist of the drilling of four additional subsea production wells at Tortue, three of which will target the Gamba reservoir and one will target the Dentale 6 reservoir.

The wells will be tied back to the BW Adolo FPSO. Drilling and completion of these new wells began in 4Q 2019 and will continue through 2Q 2020. The first two wells are expected to start producing late first quarter of 2020. All four wells are forecast to be online by mid-2020, which is expected to result in an increase in overall production from the Tortue Field to above 20,000 bopd gross.

In August 2019, BW Energy discovered the Hibiscus Field. In 2019, the Ruche development was sanctioned. Ruche Phase 1 will consist of 6 development wells targeting the Hibiscus and Ruche Fields. These wells will be drilled from the Ruche Platform and tied back to the FPSO Adolo by a 20 km pipeline. First oil is planned for end-2021. Ruche Phase 2 will consist of up to an additional 7 wells targeting the Hibiscus, Ruche and Ruche NE Fields.

BW Energy sees significant potential for further growth at Dussafu. There are the two undeveloped discoveries of Walt Whitman and Moubenga as well as a large inventory of undrilled prospects and leads that are being evaluated.

Dussafu, performance beyond expectation

The Dussafu license is situated within the Ruche Exclusive Exploitation Area (Ruche EEA), which covers 850 km2 and includes six discovered oil fields and numerous leads and prospects. The average water depth is 116 metres. The Production Sharing Contract allows for production of hydrocarbons from the Ruche EEA for up to 20 years from first production, which was achieved in September 2018.

Fields on the Dussafu block produce to the BW Adolo FPSO adjacent to the Tortue Field. Phase 1 of the Dussafu development included two subsea horizontal production wells at the Tortue Field. Production is aided by gas lift as the artificial lift mechanism. Tortue Phase 2 introduced four additional subsea production wells at Tortue Field as part of continued Dussafu development. The Hibiscus / Ruche development project in the Hibiscus and Ruche Fields is planned to initially drill up to six horizontal production wells, all targeting the Gamba reservoir.

In 2021, Tortue Field averaged a gross rate of approximately 11,300 barrels per day. Over 4.1 million barrels gross were produced during the year and the field uptime was 88%, including scheduled downtime. Gas lift capacity limitations deferred production in 2021 and will continue to constrain production until a second gas lift compressor is installed in the second half of 2022. Once commissioned, the wells at Tortue are expected to reach full potential.

After a pause in Tortue Phase 2 development due to COVID-19, drilling resumed in April 2021. DTM-6H, which was completed but not tied-in in 2020, and DTM-7H were brought online in October 2021.

The gross investment for Phase 2 was approximately USD 230 million, USD 45 million below the original budget of USD 275 million.

Recommencement of the Tortue Phase 2 drilling campaign in 2021 began with drilling the DHIBM-2 appraisal well, to further evaluate the Hibiscus field, and completed with DHBNM-1, to evaluate the Hibiscus North prospect. While DHIBM-2 did not encounter hydrocarbons, DHBNM-1 discovered oil in both Gamba and Dentale formations. Oil-in-place estimates were below expectation, so Hibiscus North is a likely candidate for a future subsea tieback option to Hibiscus Alpha rather than a standalone project.

BW Energy is currently executing the Hibiscus / Ruche development project, targeting the Hibiscus and Ruche Fields, approximately 20 kilometres northwest of the Tortue Field. The initial phase of this project involves the drilling of up to six horizontal production wells in a 12-well phased program, which will be connected to a production facility. Of these initial six wells, four wells will target the Hibiscus Field while the remaining two wells will target the Ruche Field. These initial wells will exploit the prolific Gamba reservoir.

BW Adolo FPSO will continue to serve as the hub for production in the Dussafu license. First oil from Hibiscus / Ruche development project is expected in late 2022, adding up to 30,000 bopd to gross production from the Ruche EEA in the second half of 2023. The development is expected to recover gross reserves of approximately 47.9 million barrels based on third party estimates. Gross investments for the Hibiscus / Ruche development project are currently estimated at approximately USD 393 million, which is expected to be funded largely from operating cash flow generated from production at Tortue.
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Re: [Gabon] Dussafu

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BW Energy: Acquisition of jack-ups to be converted for Dussafu developments and Q3 production update

Acquisition of jack-ups to be converted for Dussafu developments and Q3 production update



BW Energy has concluded on an alternative development plan for the Hibiscus/Ruche satellite field in the Dussafu license offshore Gabon, utilising a converted jack-up rig to reduce investments and time to first oil.

Subsequently, the Company has acquired two jack-up drilling rigs, the 2003-built sister-units “Atla” and “Balder”, from Borr Drilling Ltd. BW Energy will pay a total of USD 14.5 million for the two units.

“A jack-up conversion will enable us to reduce capital investments by about USD 100 million compared to our previous development plan,” said Carl Krogh Arnet, the CEO of BW Energy. “We are benefitting from the availability of high-quality jack-up units at very attractive prices due to the current drilling market slump. By re-using facilities we will also achieve a substantial reduction in field development related CO2 emissions compared to a newbuild platform.”

The seismic reprocessing carried out by BW Energy has indicated the potential for a substantial increase to the Greater Hibiscus oil-in-place volumes, making further developments in the Hibiscus/Ruche area highly likely.

“This development concept offers tangible financial, schedule and environmental benefits. We have consequently decided to secure a second jack-up at a very attractive price to prepare for the future development of the Dussafu license,” said Carl Krogh Arnet. “Acquiring a sister unit will enable us to re-use the engineering and project plans for a second development with obvious synergies.”

Calculations show that redeployment and conversion projects offer 70%-80% reductions to greenhouse-gas emissions compared to new built assets due to reduced steel consumption and shorter yard stays. Further tangible benefits are reduced installation cost as a jack-up can “self-install” after mobilisation to the field and no need for piling into the seabed for stability.

As announced on 16 September, the new development plan is expected to lower the estimated cash-break even oil price for the Hibiscus/Ruche (phase 1 and 2) development to approximately USD 25 per barrel Brent. With the planned increased production from Hibiscus/Ruche, the Dussafu license production cost, including the Tortue field, is expected to drop to approximately USD 11 per barrel. A final decision to restart the Hibiscus/Ruche development is subject to a lifting of COVID-19 restrictions to allow for efficient project execution.

The initial FID approved for the Hibiscus/Ruche development was approved in the fourth quarter of 2019 with an estimated gross development cost of about USD 660 million for both phases and proven resources (2P) of gross 112 million barrels of recoverable oil.

THIRD QUARTER 2020 PRODUCTION UPDATE
Gross production from Tortue averaged 15,449 bbls/day in the third quarter of 2020, amounting to a total gross production of 1,421,329 bbls of oil. BW Energy completed one lifting in the quarter, realising an average price of approximately USD 46 per barrel. Production cost (excluding royalties) was USD 19.6 per barrel. This includes approximately USD 2 million of additional costs related to the COVID-19 pandemic in the quarter.

BW Energy’s share of gross production was 1,044,676 bbls of oil. Net sold volume, which is the basis for revenue recognition in the financial statement, was 548,441 bbls, reflecting an under-lift position of 299,110 bbls at the end of the third quarter.

The company generated a positive cash flow with a cash balance of USD 145 million at 30 September 2020, compared to USD 128 million at 30 June 2020.
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Re: [Gabon] Dussafu

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BW MaBoMo commenced transit to Gabon
23 August 2022



BW Energy is pleased to announce the sail away of the BW MaBoMo (formerly Hibiscus Alpha) offshore production facility. The production facility is currently onboard a heavy-lift vessel in transit to the Dussafu license offshore Gabon where it will be installed to produce oil from the Hibiscus and Ruche fields.

The BW MaBoMo is expected to arrive on the field at the end of September for installation and hook-up with first oil planned late in the first quarter of 2023. The Hibiscus / Ruche development is expected to add up to 30,000 barrels per day of gross production once all the initial six horizontal production wells are on stream.

The platform left the Lamprell yard in Dubai on 8 August following completion of the yard scope with some minor outstanding upgrades, which were executed offshore in preparation for the sail away. The conversion project used approximately 1.9 million manhours with zero LTIs. The BW MaBoMo is a former jack-up drilling rig which has been repurposed as an offshore production facility with 12 well slots. It will be connected to the BW Adolo FPSO via a 20 km pipeline.

“By repurposing existing oil and gas production assets we extend their economic lifespan, shorten the time to first oil while also significantly reducing the field development investments and CO2 footprint. We are very pleased to have completed the conversion project with excellent HSE results and only minor adjustments to schedule and budget in a highly challenging environment due to COVID-19, supply chain disturbances, geopolitical tension and commodity inflation,” said Carl K. Arnet, the CEO of BW Energy.
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Re: [Gabon] Dussafu - BW Adolo

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BW Energy: Drilling operations completed on first Hibiscus production well

April 3, 2023
Drilling operations completed on first Hibiscus production well

BW Energy has completed the drilling and completion operations on DHIBM-3H, the first production well of the Hibiscus / Ruche Phase 1 development campaign in the Dussafu licence offshore Gabon. Responsibility for the DHIBM-3H well has been handed over to the production team which will finalise preparations for production start-up. First oil from the well is expected in early April. Commissioning and start-up of the new gas lift compressor will follow the first oil activities on the FPSO.

The DHIBM-3H well has been drilled from the BW MaBoMo production facility to a depth of 3,883 metres into Gamba sandstone reservoir in the Hibiscus field. Drilling operations began at the start of the year with batch setting of conductors and surface casing on three Hibiscus wells. In addition, a further three conductors have been batch set on slots planned for Ruche / Hibiscus fields. The drilling campaign followed the successful installation of the production facility, risers, and pipeline. DHIBM-3H drilling results (drain length and reservoir properties) are in line with expectations. The oil produced at Hibiscus / Ruche will be processed on the BW Adolo FPSO together with the established Tortue production before offloading to oil tankers.
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Re: [Gabon] Dussafu - BW Adolo

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First oil from Hibiscus / Ruche development

10 April 2023
First oil from Hibiscus / Ruche development

BW Energy is pleased to announce that first oil from the Hibiscus / Ruche Phase 1 development in the Dussafu licence offshore Gabon has been safely achieved. Production performance from the first well has been in line with expectations and is currently stabilised at approximately 6,000 barrels per day.

"We delivered first oil from Hibiscus / Ruche on schedule with an excellent HSE performance. This represents the first of several steps on a path for successive production growth in Gabon as we complete the drilling program and asset upgrades through 2023 and into early 2024,” said Carl Krogh Arnet, the CEO of BW Energy.

The DHIBM-3H well was drilled from the BW MaBoMo production facility to a depth of 3,883 metres into Gamba sandstone reservoir on the Hibiscus field. Drilling operations commenced at the start of the year following the successful installation of the production facility, risers, and pipelines. The oil produced at Hibiscus / Ruche is transported by pipeline to the BW Adolo FPSO for processing and storage before offloading to oil tankers.

The Hibiscus / Ruche Phase 1 drilling campaign targets four Hibiscus Gamba and two Ruche Gamba wells which are expected to add approximately 30,000 barrels per day of total oil production when all wells are completed in early 2024. The wells are drilled by the Borr Norve jackup rig.

Separately, the installation of the gas lift compressor is ongoing on the BW Adolo with focus on commissioning and start-up following first oil from Hibiscus / Ruche, which had priority during the high-activity period onboard the FPSO.

"Our priority now is to complete start-up activities and stabilise production from the DHIBM-3H well. In parallel, work progresses towards start-up of the new gas lift compressor to support production from the existing six Tortue wells while also moving ahead with drilling of the next Hibiscus / Ruche production wells as planned," said Carl K. Arnet.
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