Brazilian state-run oil company Petrobras signed an agreement with Norway’s Equinor on Monday to study the potential of seven offshore wind sites along Brazil’s coast, Equinor announced in a press release.

The two companies will assess the technical, economic, and environmental feasibility of the seven sites.

The agreement expands a partnership signed between Petrobras and Equinor in 2018. This originally planned to assess two wind farm opportunities, Aracatu I and II, and to study five more possible sites for wind projects.

In addition to these two projects, the agreement will now include wind development viability assessments at five sites off Brazil’s north-eastern coast. These are Mangara (off the coast of Piauí state), Ibitucatu (off coast of Ceará), Colibri (between Rio Grande do Norte and Ceará), as well as Atobá and Ibituassu (both on the coast of Rio Grande do Sul).

“We are happy to expand our collaboration to renewables, enabling a broad energy offering in Brazil,” said Equinor CEO Anders Opedal. “Together we are actively engaging to contribute to the realization of offshore wind and Brazil’s energy transition, by creating the necessary initial conditions for renewables energy to develop in a sustainable way,” he added.

Petrobras president and CEO Jean Paul Prates said: “It is worth mentioning, however, that the phase is for studies and the allocation of investments depends on in-depth analyses to assess their viability, in addition to regulatory advances that will allow the authorization processes for the activities, to be carried out” as part of the agreement.

Equinor has operated in Brazil for over two decades. In 2018 it announced that it will invest up to $15bn in Brazilian energy over the next 12 years, in both fossil fuels and renewables.