Exploration • Drilling • Field Services
producing Copa-1 well. With positive testing of the hydrocarbon potential in Copa-4, the oil reservoir in the Copa field will be extended to the west with an expected upward revision of the reserves for all three producing reservoir units in the Copa field.
Exploration well PetroMagdalena Energy has also announced that the Alondra-1st exploration well in the Cubiro block reached total depth (TD) of 6291 feet measured depth (MD) on 12 April in the Carbonera C8 Formation. Te well is in Polygon B of the Cubiro Block, where PetroMagdalena has a 70 per cent working interest. PetroMagdalena has a working interest in 19 properties in five basins in Colombia. Gran Tierra Energy has also recently provided updates for its operations in Colombia. Te Ramiriqui-1 oil exploration well in the Llanos-22 block, located in the Andean foothills trend of the Llanos Basin, has reached total depth at 19,519 feet MD in basement. Gran Tierra Energy, along with its operating
partner Compania Espanola de Petroleos (CEPSA), has completed initial testing on Ramiriqui-1 by collecting reservoir data and fluid samples from the Mirador formation. Te Mirador formation has 130 feet gross thickness and was perforated and tested from 17,610 feet to 17,630 feet MD in the uppermost primary reservoir interval. Te interval had natural flow rates, without pumps, of up to 2525 barrels/d of oil gross over 32.5 hours with a 28/64 inch choke and a 0.12 per cent watercut with 26° API gravity oil. Te Ramiriqui-1 well flowed at a restricted rate due to gas flaring limitations. Te partners are currently evaluating options
for testing additional reservoir intervals, drilling of an appraisal well, and implementation of an early production programme. “We are extremely pleased with the early success
of Gran Tierra Energy’s 2012 exploration drilling programme, building on our growing reserves and production base in the Llanos Basin,” said Dana Coffield, president and ceo of Gran Tierra Energy. “Tis is the first of four exploration wells planned for this year in Colombia, with two in the Llanos Basin and two in the Putumayo Basin. In addition, one exploration well in Peru, two exploration wells in Brazil and three exploration wells in Argentina are planned through the balance of the year.” Also in Colombia, Amerisur Resources announced that it has spudded the well Platanillo-3 in the Platanillo Field, the first of a planned six well drilling campaign. Te Serinco D-10 drilling rig was recently mobilised to the Platform 9 location and was rigged up and tested before beginning operations on 5 April. Drilling began through a pre- set 13.3
/8 ” conductor pipe. Te well has currently
reached approximately 914 metres and operations are continuing according to plan. Te total planned depth of the well is 2523
metres and the company expects to have electric log and test results from the well shortly.
Drilling in Brazil OGX Petróleo e Gás, the Brazilian oil and gas company responsible for the largest private-sector exploratory campaign in Brazil, has identified the presence of light oil in the Natal accumulation in the Santos basin.
Te company announced that well 3-OGX- 74-SPS, the first extension well of the Natal
Wintershall lands Argentina licence W
intershall Energía, a wholly owned subsidiary of Kassel-
based Wintershall, has been awarded the exploration permit for the area Cuenca Neuquina V (CN-V) by the Mendoza Province. Te area is located in the southernmost region of the Province and covers 956 km2 Since 2004 Wintershall has
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performed field and lab-work over the whole surface, including geology mapping, geochemical analysis, geological modelling as well as 2D seismic reprocessing and interpretation. Recent evaluations indicate that the CN-V Block has
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an important potential to explore and develop conventional and unconventional reservoirs (shale gas and shale oil) in two different sedimentary levels. Wintershall has been active in Argentina since 1978, especially in the production of natural gas. Te company has working interests in 15 oil and gas fields and is one of the largest natural producers in the country with an annual production of 27 million barrels of oil equivalent. Tis exploration commitment underlines that Wintershall Energía is determined to continue investing in
Argentina on a long-term basis. As the country’s fourth largest gas producer, Wintershall plays a prominent role in oil and gas exploration and production in Argentina. “Te award of the CN-V exploration
permit establishes Wintershall as operator. It represents an excellent opportunity to deploy the company’s technical experience in unconventional reservoirs in the promising and fast growing shale projects in the Neuquen Basin, one of the most prospective shale oil and gas regions in the world,” said Gustavo Albrecht, md of Wintershall Energía. ●
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