On 30 January 2020, in a two-stage working interest change, the ANP granted ExxonMobil approval to transfer 50% working interest to partner Azibras and for Azibras to transfer 30% working interest to new operator OP Energia in the CE-M-603 contract, in the offshore Ceara Basin.   The CE-M-603 block was operated by ExxonMobil with 50% working interest and Azibras held 50%. With the formal approval OP Energia is operator with 30% working interest and Azibras now holds 70% non-operated working interest in the CE-M-603 block.  On 15 August 2018, the ANP granted ExxonMobil a 2nd contract extension for its ANP Round 11, CE-M-603 contract, in the offshore Ceara Basin. The ANP granted a 24-month extension to the first period exploration expiry from 10 July 2019 to 10 July 2021 and the final expiry from 10 July 2021 to 10 July 2023.  The partners acquired 326 sq km of the PGS Fortaleza multi-client 3D survey concluded in the basin in January 2016. PGS concluded acquisition of a 7,300 sq km Fortaleza multi-client 3D seismic survey in the offshore Ceara Basin over ANP Round 11 awarded blocks during early-January 2016.The survey commenced in early September 2015.   On 5 July 2017, the ANP granted ExxonMobil a contract extension for its ANP Round 11, CE-M-603 contract in the offshore Ceara Basin due to delays with the environmental permit for seismic acquisition. The ANP granted a 314-day extension to the first period exploration expiry from 30 August 2018 to 10 July 2019 and the final expiry from 30 August 2020 to 10 July 2021.
ExxonMobil transferred 35% WI in the POT-M-475 and 50% in the CE-M-603 block in the Potiguar and Ceara basins to OP Energia (Ouro Preto Oleo e Gas) and Azibras. Both blocks are undrilled. OP will now be the operator in both blocks with a 30% working interest in partnership with Azibras, which will have 70%.