In early September 2017, US-based Hupecol Operating Co LLC (Hupecol) acquired 100% WI in the Llanos Basin CPO-11 block from state-company Ecopetrol. The farm-out agreement was signed in 2016 and it appears that Hupecol funded a number of wells in the transfer period including the Venus-2A appraisal well. which produced an average of 332 bo/d in September 2017 during extensive testing. Ecopetrol made the Venus-2 heavy oil discovery in the south western portion of the block in 2013. That well tested 630 b/d of 17-degree API crude with a water cut of 39% from Oligocene basal sands (likely Carbonera Formation). The well reached a total depth of 1,312m on 6 February 2013. In April 2014, the successful Venus-3 ST1 appraisal well was followed in May 2014 by the Venus-4 appraisal (P&A, assumed dry). Hupecol is also thought to have drilled two NFWs called Tamanaco-A1 & Tamanaco-B1 in 2016-2017. Hupecol P&A'd the Tamanaco-1 NFW in the centre of the block in early 2000 to a TD of 1484m.
Hupecol acquired 100% WI in the CPO-11 block from state-company Ecopetrol.