Gran Tierra Energy has completed initial testing on Moqueta-1 by collecting reservoir data and fluid samples from two zones – the lower Caballos Formation and the Villeta T Sandstone. The Caballos Formation has 53ft of total hydrocarbon pay, subdivided into 27ft of net gas pay in the Upper Caballos and 26ft of net oil pay in the Lower Caballos.
A 20ft net (39ft gross) interval in the lower portion of the lower Caballos oil bearing interval was tested and perforated from 3,950ft to 3,970ft measured depth. A variety of tests were performed resulting in natural flow rates, without pumps, of up to 349 barrels of oil per day with a 32/64 inch choke and a 0.2% watercut with 29 degrees API gravity oil.
In the Villeta T Sandstone, a short 12ft (3,734ft to 3,746ft measured depth) interval of the 55ft of net gas pay was perforated and tested at 13 million standard cubic feet per day using a 48/64 inch choke size. No additional gas testing was conducted in the T Sandstone in order to preserve the casing integrity for future oil production from the Lower Caballos.
Planning is underway to construct an 8km pipeline to tie Moqueta-1 into the Costayaco infrastructure, with anticipated initiation of long term oil testing and early production in the first quarter of 2011.
The drilling rig is currently being mobilized to drill Moqueta-2, an appraisal well to be drilled from the existing Moqueta-1 pad. The bottom-hole location is planned to be approximately 270mt east of the Moqueta-1 bottom-hole location.
The objective is to delineate the volume of the lower Caballos oil pool by targeting the reservoir approximately 60ft deeper down the flank of the structure. Moqueta-2 will also test the potential for a gas/oil contact in the Villeta U, Villeta T and upper Caballos zones down structure.
Pending results from Moqueta-2 and Moqueta-3 will be drilled from a new pad location approximately 1.5km southwest of the Moqueta-1 surface location.
A 230sqkm 3D seismic survey is scheduled to be conducted to cover the Moqueta discovery and adjacent prospects and leads. This survey will overlap existing 3D surveys that cover the Costayaco Field in the Chaza Block; the Juanambu, Toroyaco, Linda, Mary, and Miraflor Fields in the adjacent Gran Tierra Energy operated Santana and Guayuyaco Blocks; as well as the upcoming Verdeyaco 3D survey on the Chaza and Guayuyaco Blocks.
Gran Tierra Energy has also said that the OTA pipeline has been repaired, with deliveries expected to resume in the coming week.
