Exploration/Development Briefs

April 8, 2013


GeoPark Holdings Ltd. has drilled, completed, and placed on production oil development wells on two operated blocks in Colombia's Llanos basin.

The Max-2 well in Max oil field on the Llanos 34 block made 1,532 b/d of 13.7° gravity oil with less than 1% water cut with 70 psi wellhead pressure on a 19-mm choke on test with an electric submersible pump from the Guadalupe formation. More tests are needed to determine stabilized flow rates and reservoir extent. Total depth is 3,312 m.

Max oil field was discovered in 2012 with the Max-1 well, which is producing 1,031 b/d of oil.

The La Cuerva CH NE-1 well in La Cuerva oil field on the La Cuerva block produced 440 b/d of 20.8° gravity oil with a 14% water cut with 100 psi wellhead pressure through an 8.7-mm choke on ESP from the Carbonera C5 formation at 1,175 m. More tests are needed to learn stabilized flow rates and reservoir extent. Total depth is 1,279 m.

GeoPark has a 45% working interest in Llanos 34 and a 100% working interest in La Cuerva.

Equatorial Guinea

Noble Energy Inc. has spudded the I-7 exploratory well on Block I offshore Equatorial Guinea, said 7.5% interest holder PA Resources AB, Stockholm.

The Atwood Hunter semisubmersible is drilling the Carla South prospect on trend with the Carla North discovery recently appraised on Block O north of Block I. The target is Tertiary sandstones of similar age to those in the discovery to the north. Drilling is to take 25 days followed by a sidetrack of similar duration.

PA Resources noted the likelihood that an appraisal well will be drilled on Block I later this year on the existing Diega discovery.


Reliance Industries Ltd., operator of the NEC-25 block in the Bengal basin offshore northeastern India, submitted the field development plan to the government of India.

Niko Resources Ltd., Calgary, which has a 10% working interest in the 3.6 million acre block, said an independent reservoir engineering firm is working on a reserves and economic evaluation for Niko's block interest.

With field development plans submitted and increased clarity on future gas prices for the developments, Niko said it expects to book reserves for the NEC-25 block and other planned development projects in its portfolio, effective Mar. 31.

Reliance Industries operates NEC-25 with a 60% working interest, and a unit of BP PLC has 30%. When developed, the block is expected to produce gas from a deltaic channel complex.


Liberia's legislature has ratified the restated and amended production sharing contract covering offshore Block LB-13, said Canadian Overseas Petroleum Ltd., Calgary.

Closing and completion of the previously announced transactions between the company's Canadian Overseas Petroleum Bermuda Ltd. subsidiary, first with Peppercoast Petroleum PLC and second with ExxonMobil Exploration & Production Liberia Ltd., is expected to occur within weeks subject to satisfying closing and completion conditions, COPL said.

Once the transactions have closed, working interests in the block will be operator ExxonMobil 80% and COPL 20% (OGJ Online, Nov. 16, 2011).


HRT Walvis Petroleum (Pty.) Ltd., Rio de Janeiro, has spudded the Wingat-1 exploratory well on Block 2212A in the Walvis basin offshore Namibia.

Wingat-1 is in 1,034 m of water in Petroleum Exploration License 23 about 200 km northwest of Walvis Bay. It targets the Wingat prospect, an elongated combination trap with a potential P10 area of 381 sq km of which there is a four-way structural closure of 42 sq km.

The well's main objective is to test the resource potential of the Albian-aged carbonate platform that has a well-defined seismic amplitude anomaly in the PSDM-3D data set.

Reservoirs are expected to be encountered at 3,950 m below sea-level. The Transocean Marianas semisubmersible is to drill Wingat-1 to 4,100 m in about 60 days.

HRT is operator of 10 blocks in four petroleum licenses off Namibia. GALP Energia, Lisbon, has a 14% participating interest in the first 3 wells of the exploration campaign.


Drilling resumed late last week in Kokopelli gas field in the Piceance basin with spudding of the Federal 6-7-15-27 directional well in Garfield County, Colo., said Dejour Energy Inc., Denver.

The well is the first of three to be drilled back to back. Drilling and setting of surface casing will continue next week for each of Federal 6-7-14-27 and Federal 6-7-13-27, prior to drilling out of surface casing, logging and casing of each well to a total depth of about 8,300 ft.

The target zone encompasses multiple horizons in the liquids-rich Williams Fork formation member of Cretaceous MesaVerde.

Dejour operates this Kokopelli project with a 100% working interest in the three wells, subject to a previously announced agreement with a Denver drilling fund.