Progress of just one of Brazil’s premier oil discoveries is in full swing in the presalt Santos basin. Located about 180 km (112 mi) offshore Rio de Janeiro, the 1,550-sq km (598-sq mi) Libra block characteristics high-quality carbonate reservoirs that are amid the country’s most effective, with oil columns up to 400 m (1,312 ft) thick. Nonetheless, the substantial flow costs and pressures, substantial gasoline-oil material, and carbon dioxide have all necessitated implementation of the hottest-era solutions to aid creation. As a result, Petrobras and its partners in the Libra consortium have responded by developing new systems to run in these environments, where h2o depths range from 1,700-2,400 m (5,577-7,874 ft), with subsurface depths of up to 6,000 m (19,685 ft).
The Libra consortium is led by Petrobras (40% interest), in partnership with Shell (20%), Whole (20%), CNPC (10%), and CNOOC Ltd. (10%). Pré-Sal Petróleo manages the Libra manufacturing-sharing deal, which was signed in December 2013.
In Oct 2018, the consortium done a practically a single-yr extended effectively check (EWT) program on the Mero area in the northwest part of the Libra block. This had began in November 2017 from the FPSO Pioneiro de Libra, Petrobras’ initial EWT-committed unit outfitted to re-inject the gas generated.
The FPSO’s gas re-injection ability eradicates ongoing flaring of gas, helping to lower carbon dioxide to the atmosphere though allowing for wells to create at their greatest possible. Through the checks, the generation properly delivered 58,000 boe/d, which the operator explained as “a fantastic final result in ultra-deepwaters.”
Re-injection of gasoline was one particular of five new technologies deployed for the test software.
In addition, staying capable to make throughout the EWT without having limitations helped enhance the acquisition of dynamic data from the reservoir. This arrangement also involved the initial pre-launch of adaptable lines with floats in ultra-deepwaters in advance of a creation start off 43 days later. Use of 8-in. flexible risers in a lazy wave configuration authorized high-volume output in this water depth. Because of to the masses imposed on the traces, the FPSO has an exterior turret anchoring offering the strongest support of a vertical load in the offshore industry’s record, Petrobras claimed, with a potential of 700 tons for each of the nine risers in water depths of up to 2,400 m (7,874 ft).
The turret mooring procedure integrated a sturdy swivel, which allows the vessel to rotate in relation to the turret. According to Petrobras, it supports the major functioning and design and style pressures – respectively 550 bar and 605 bar (7,977 psi and 10,080 psi) – for fuel injection any place in the oil marketplace.
The other aims of the system, all achieved, were to acquire superior-excellent knowledge and lower uncertainties about the reservoir to enable accelerated deployment of up to 4 full-scale 180,000-b/d potential manufacturing methods on the Mero subject in the next couple of yrs.
The FPSO Pioneiro de Libra will keep on being in support conducting early creation devices at other Mero wells. The FPSO, which was converted from the 1995-developed shuttle tanker Navion Norvegia at Jurong Shipyard in Singapore, has a generation ability of 50,000 b/d of oil and compression capacity of 4 MMcm/d of gasoline.
Petrobras added the test program should really add to the risk-free and efficient improvement of future jobs throughout the world wide ultra-deepwater oil and gasoline marketplace.
Later this thirty day period, the corporation will get the Distinguished Achievement Award at OTC Brazil for improvements developed through the Libra lengthy-term testing application.
Carlos Alberto Pereira de Oliveira, Petrobras’ director of Exploration and Manufacturing, reported: “Since there had been no comparable situations in the market, our technicians and companions produced progressive remedies. For instance, we applied all carbon dioxide created to raise the productivity of the reservoir. We ended up daring when conducting the pre-start of functions of flexible lines with floats in the deep sea – prior to even selecting the platforms.”
In November 2017, the consortium introduced the 1st whole stage of the Mero job. Mero 1 is composed of an FPSO and up to 17 wells. 1st oil is planned for 2021. Approximated recoverable quantity is 3.3 Bbbl of oil.
MODEC gained the provide, constitution, and operations contract for the FPSO Guanabara, which will have a processing ability of up to 180,000 b/d of oil, 12 MMcm/d of gas, 225,000 b/d of water injection, and storage capability of 1.4 MMbbl of crude oil. SOFEC Inc., a MODEC team business, is giving the unfold mooring system. The agency charter period of the agreement is 22 several years. The business stated it will deliver the vessel with Brazilian area material. This will be MODEC’s 14th FPSO/FSO vessel in Brazil, and its seventh FPSO in the presalt.
Petrobras commissioned Aker Alternative to supply the subsea output program which will consist of 12 vertical subsea trees made for Brazil’s presalt, 4 subsea distribution units, three topsides learn command stations for the FPSO, and spare elements. All function will be managed by the company’s subsea manufacturing complex in São José dos Pinhais and its subsea solutions foundation in Rio das Ostras. Products deliveries are scheduled for 2020, with installations distribute amongst 2020 and 2023.
TechnipFMC won an EPCI agreement for all rigid traces and installation and pre-commissioning of the infield riser and flowline method for interconnecting 13 wells (6 producers and 7 water alternate gasoline injectors) to the FPSO. It also contains installation of rigid pipelines (together with corrosion-resistant alloy and metal lazy wave risers), versatile risers and flowlines, metal tube umbilicals, and other subsea gear.
With the declaration of commerciality in November 2017, the northwestern portion of the Libra block formally turned a field and was named Mero.(Map courtesy Total)
In June 2019, the consortium sanctioned the next total section of the venture.
Arnaud Breuillac, president Exploration & Production at Total, explained: “The choice to launch Mero 2 arrives as a new milestone in this substantial-scale venture that will establish the large oil sources of the Mero field, believed at 3-4 Bbbl.
“The Libra consortium can leverage the great efficiency of the discipline to acquire a important oil venture with complex fees below $20/bbl and lower breakeven…Once the comprehensive probable of the subject is produced, creation need to access additional than 600,000 b/d.”
SBM Offshore has signed a letter of intent with Petrobras for a 22.5-calendar year lease and run arrangement for the second Mero FPSO. This will be built and manufactured making use of SBM’s Quickly4Ward application, also applied to the ExxonMobil-operated Liza subject development in the Stabroek block offshore Guyana. It involves provision of a newbuild, multi-intent hull combined with numerous standardized topsides modules. This award marked SBM’s return to the Brazil marketplace.
The FPSO Sepetiba will have a processing potential of 180,000 b/d of oil, 12 MMcm/d of gas, 250,000 b/d of drinking water injection, and storage ability of 1.4 MMbbl of crude oil. Whole pounds of the topsides modules is anticipated to be all-around 33,000 tons. The FPSO will be unfold moored in 2,000 m (6,562 ft) h2o depth and website link up to 16 wells. Supply is owing in 2022.
Adhering to the launch of Mero 2, Full additional, the partners hope to increase two even more FPSOs of comparable capability, with all 4 generation models deployed on the Mero area in the northwestern element of the Libra block. The central and southeast panels will stay beneath exploration until finally 2020. •