On 19 April 2018, GeoPark announced that it has successfully completed and brought on production the Tigana Norte-9 appraisal well on the Llanos Basin LLA-34 Block. The well was drilled outside of the 3P outline defined in the 2017 DeGolyer and MacNaughton reserve certification to a TD of around 3,530m and did not encounter an oil-water contact. A production test conducted with an ESP in the Guadalupe Formation resulted in a flow of 1,150 b/d of 13.9 degrees API oil, with an approximate water cut of 1%, through a choke of 80/64 inches and wellhead pressure of 120 pounds per square inch. This latest appraisal well extends the Tigana/Jacana field complex field further to the north east of the block. The field complex accounted for around 25,350 bo/d of net production for the company in Q1 2018, which is 96% of its Colombian production. Development wells are planned for the rest of the quarter, predominantly in the Tigana Sur Oeste Field, but also in Tigana Norte and Jacana. GeoPark Colombia operates the block with 45% WI (80% GeoPark and 20% LG international) with Parex holding the remainder.
Rosneft discovered a new oil pool at the Tarasovskoye field in Yamalo-Nenets Autonomous Okrug (Western Siberia). In September 2017, the company re-entered development well Tarasovskaya 3290 drilled to 2,700 m and completed on reservoir BP10-11 (2,612-2,635 m). The well was side-tracked from 2,650 m and drilled to 3,373 m at the Tyumen Formation (Middle Jurassic). Oil and formation water at rates of 30 b/d and 75 b/d, accordingly, were tested from reservoir Yu3 perforated at 3,285-3,293 m