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 Merecure Block in the Llanos Basin, is now operated by Cepsa Colombia with 35% working interest, and non-operating partners Parex Resources Colombia Ltd with 35% working interest and Perenco with the remaining 30%.  Parex announced on 7 March 2019 it had signed a farm-in agreement to acquire 35% working interest from the 70% working interests owned by operator Cepsa Colombia. As part of the agreement, Parex would pay 100% of the cost to drill two exploration wells. Parex indicated that the Tamariniza 1 new-field wildcat (NFW) was drilled in the second quarter of 2019 as part of the agreement.   In March 2007, the original 2,381.90 sq km Merecure Block was awarded to operator Cepsa, with 100% working interest. Petrobras farmed-in in the block in December 2008 acquiring 30% working interest and later in April 2014 Perenco took over the working interest previously owned by Petrobras. In October 2016, Cepsa relinquished part of the block remaining with 1,142.11 sq km, and in April 2020, it made a partial relinquishment again, so that now the Merecure block has an area of 571.11 sq km.  Background Information  In August 2019, Parex Resources reported oil in the Cepsa-operated Tamariniza 1 NFW. Tests yielded some 800 bo/d gross. The well was spudded on 12 March 2019 and reached a total depth (TD) of some 5,173 ft (1,577 m) on 25 March 2019.
(Llanos-Barinas B.) Merecure block, op. by MUBADALA I (70%), PERENCO (30%) the Agencia Nacional de Hidrocarburos (ANH) indicated that the Merecure Block is now operated by Cepsa Colombia with 35% working interest, and non-operating partners Parex Resources Colombia Ltd with 35% working interest and Perenco with the remaining 30%.