On 28 January 2019, Gran Tierra Energy (GTE) announced they found hydrocarbons, assumed to be oil, in the Cocona 2 outpost in the PUT-1 Block based on the results of the Vonu 1 discovery. Operations were suspended and GTE indicated the Cocona 2 outpost will have a production test during the first quarter of 2020.  The Cocona 2 outpost spudded on 22 December 2019 after the Cocona 1 outpost was junked. The Cocona 2 outpost spudded from a second cellar at the same pad site as the Cocona 1 outpost.  The Cocona 2 outpost reached the planned total depth of 10,603 ft (3,232 m). GTE indicated that operations were suspended due to mechanical failure. The Cocona 2 outpost was targeting the Upper Cretaceous N, U sands and the fractured A-Limestone successfully tested with the Vonu 1 discovery. It is assumed the target is a faulted anticline.  The 463.96 sq km PUT-1 Block is owned and operated 100% by GTE. The original block was initially awarded in March 2009 to Lewis Energy Colombia (operator, 100%). In August 2010, GTE became the operator of the block with 55% working interest, and Lewis Energy kept the remaining 45%. GTE became the only owner and operator of the PUT-1 Block in November 2018.  Background Information  GTE reported plans to spud the Cocona 1 outpost well in late November 2019. The Cocona 1 was the first appraisal well to be drilled for the Vonu 1 discovery, GTE's most successful Villeta A Limestone exploration well to date. The Vonu 1 was discovered in 2017 and is currently producing over 400 Bboe/d from the Villeta A.   On 5 June 2017 GTE had announced a multi-zone oil discovery in its Vonu 1 new-field wildcat (NFW) located on the PUT-1 Block. Log interpretation indicated oil saturation within six separate reservoirs having a cumulative pay thickness of some 157 ft (48 m) true vertical depth (TVD). The well encountered 8.2 ft (2.5 m) of net oil pay in the Villeta N Sand Member, 3.4 ft (1 m) of net oil pay in the Villeta M1 Limestone Member, 8.7 ft (2.6 m) of net oil pay in the Villeta M2 Limestone Member, 91.1 ft (27.7 m) of net oil pay in the Villeta A Limestone Member, 15.3 ft (4.6 m) of net oil pay in the Villeta U Sand Member and 30.7 ft (9.3 m) of net oil pay in the Villeta T Sand Member. GTE expected to test all zones individually during June 2017. The Vonu 1 NFW was spudded on 6 May 2017 aimed at the multi-zone structural prospect defined on 3D seismic as separate from the adjacent Costayaco field. The directional well targeted the Caballos Formation, the Villeta U, T and N Sand Members and the Villeta A Limestone Member.
Cocona-2 appr Vonu Este pad, appraisal to Vonu discovery in PUT-1 block, Putumayo Basin, spudded 22 Dec '19 in replacement of Cocona-1 (junked), suspended late Jan '20 at TD 3,232m after encountering (believed) oil, testing planned. Target Upper Cretaceous N + U sands and A-Limestone.