In early April 2018, Tecpetrol Colombia SAS abandoned the Tillava Sur-1H horizontal appraisal well in a southeast portion of the heavy oil Llanos Basin CPO-13 Block, according to industry sources. The appraisal well was spudded in mid-March 2018 to target the basal sands of the Carbonera Formation. It reached a final TD of 1,370m, about 800m NE of its surface location, in late March 2018. Initial production testing yielded 2,047 bo/d with 13.8deg gravity oil but with a 97% water cut and therefore the well was abandoned. This is similar to the Tillava Sur-1 NFW drilled in early 2015 which found oil in the Carbonera Formation. Then-partner PetroNova reported in February 2015 that Tecpetrol has recorded surprisingly low flow rates of good-quality oil with a 96% water cut in the well. Once the borehole was gravel packed, cased and cemented at an interval of 814-817m in the Carbonera Formation, tests were conducted using a jet pump. Upon completion of flow tests, the jet pump was found to be choked with viscous heavy oil. CPO-13 is operated 100% by Tecpetrol.
Colombia, CPO 13