The Mero field is an ultra-deepwater oilfield situated approximately 180km offshore Rio de Janeiro in the Libra block, Brazil. It is located in the pre-salt area of the Santos basin.
The Mero field is owned by the Libra consortium, which is led by Petrobras (40%) and includes Shell (20%), Total (20%), CNPC (10%) and CNOOC Limited (10%).
Petrobras is the operator of the Libra Consortium. Petrobras initially declared the commercial viability of the Mero oilfield in November 2017.
First oil is expected to be achieved from the field in 2021.
Mero oilfield discovery and reserves
The Mero oilfield was discovered by the 2-ANP-2A-RJS appraisal well that was drilled in 2010.
The drilling was conducted as part of the Libra oilfield appraisal in the north-western part of the giant Libra block.
A total of ten appraisal wells were drilled in the Mero field area to determine the commercial viability of the field, while two more are planned to be drilled in 2018.
The wells discovered oil columns as thick as 410m.
An extended well testing (EWT) programme is being carried out within the Mero 2 and Mero 3 areas using the Pioneiro de Libra floating production storage and offloading (FPSO) unit.
The EWT is expected to be carried out over a period of 12 months.
The Mero oilfield holds approximately 3.3 billion barrels of oil equivalent (boe) in high-quality, high-yield carbonate reservoirs.
Mero oilfield development details
The Mero field is divided into four areas, namely Mero 1, Mero 2, Mero 3 and Mero 4, which will all be developed separately.
The project will see the development of interconnection of 17 wells.
In addition, the Libra consortium has planned a total of four FPSOs for the four areas to produce and process the oil extracted from the wells in their respective areas.
The initial development scheme will focus on the Mero 1 and Mero 2 areas, which are currently expected to commence production in 2021 and 2022 respectively.
Details of Mero FPSO
The first FPSO unit to be installed at the Mero field will be named as FPSO Guanabara MV31.
It will have an operational capacity of 180,000 barrels of oil equivalent a day (boed) and 12 million cubic metres a day of gas (Mcmd).
The FPSO will also have a water injection capacity of 225,000 barrels of water a day and a storage capacity of 1.4 million barrels of crude oil.
The unit will be deployed in water depths of 2,100m and feature a spread mooring system.
It will be operated by Libra MV31, which is jointly owned by MODEC (20.1%), Mitsui & Co (32.4%), Mitsui OSK Lines (20.6%), Marubeni Corporation (17.6%) and Mitsui E&S Holdings Co (9.3%).
The engineering, procurement, construction, mobilisation, installation and operation of the Mero FPSO will be carried out by MODEC.
MODEC will also provide the topsides, processing equipment, hull and marine systems for the development.
The company will charter and operate the FPSO for a period of 22 years.
MODEC subsidiary SOFEC will be responsible for the design, supply and installation of a spread mooring system for the Mero oilfield.
The Teekay Offshore and Ocyan-owned vessel Pioneiro de Libra FPSO is carrying out the EWT for the wells within the Mero field.