Amerisur Resources plc (AIM:AMER) agreed to acquire 85% stake in the Mecaya Block from Petex Offshore, Inc. and Mecaya Oil and Gas Ltd for $2.4 million on November 21, 2018. Mecaya Oil and Gas will cede a 55% working interest in exchange for a cash payment of $0.4 million over a three-year period, a payment of $1.2 million from 50% of Amerisur production in the Mecaya block, payable only when the block is in production, and once the production payment has been completed, a royalty payment equal to 4% of production revenue post Government royalties. While Petex Offshore Inc. will cede a 30% working interest in exchange for a cash payment on completion of $0.15 million, a payment of $0.6 million from 10% of Amerisur production in the Mecaya block, payable only when the block is in production, and a royalty payment equal to 2.2% of production revenue post Government royalties. Amerisur has increased its stake in the block from 15% to 100%. Completion of this transaction is conditional on approval from the Agencia Nacional de Hidrocarburos. Camarco led by Billy Clegg, Georgia Edmonds, Kimbereley Taylor, Stifel Nicolaus Europe Limited led by Callum Stewart, Nicholas Rhodes, Ashton Clanfield, Investec led by Chris Sim and Alexander Ruffman, and Arden Partners plc led by Paul Shackleton and Dan Gee-Summons all acted as financial advisors to Amerisur Resources. Amerisur Resources plc (AIM:AMER) cancelled the acquisition of 85% stake in the Mecaya Block from Petex Offshore, Inc. and Mecaya Oil and Gas Ltd on November 21, 2019.