In August 2020, the Agencia Nacional de Hidrocarburos (ANH) published the status of Exploration and Production (E&P) contracts and Technical Exploration Agreements (TEAs) valid as of 30 June 2020, and indicated that the PUT 8 Block, in the Putumayo Basin, is now operated by Amerisur Exploracion Colombia Limited with 50% working interest, and non-operating partner Occidental Andina LLC with the remaining 50%.  The deal with Occidental Andina to divest 50% working interest in the PUT 8 Block had been announced by Amerisur on 17 June 2019 and had a value of USD 19.1 million.   On 20 March 2019 Amerisur announced it would acquire operatorship and 50% interest from Vetra for the PUT 8 Block. After a February 2019 announcement for the proposed sale of interest, Amerisur exercised its right of first refusal per terms of the Joint Operating Agreement (JOA) with Vetra. The USD 19.1 million company deal was subject to ANH approval. On 21 November 2019 the ANH indicated that Amerisur was the operator of the PUT 8 block with 100% working interest.  The 440.10 sq km PUT 8 Block was officially awarded in March 2011 to operator Vetra E&P Colombia SAS with 50% working interest and C&C Energia Group SA with the remaining 50% working interest. In January 2013, Pacific Rubiales Energy Corp acquired C&C Energia through its subsidiary Platino Energy Corp and in January 2016 Amerisur acquired Platino Energy. In January 2020 GeoPark announced the acquisition of Amerisur.
(Putumayo B.) PUT 8 block, the Agencia Nacional de Hidrocarburos (ANH) indicated that the PUT 8 Block is now operated by Amerisur Exploracion Colombia Limited with 50% working interest, and non-operating partner Occidental Andina LLC with the remaining 50%. 