Exploration • Drilling • Field Services
is in progress, with sales expected to begin by early August. Carrizo oil and gas, the Houston-based energy company with major interests in the Eagle Ford shale in South Texas and the Marcellus shale in Appalachia, has also issued an update on its current activities. Te company has recently entered into firm agreements to acquire over 13 000 net acres of Eagle Ford Shale mineral interests, bringing its total net Eagle Ford land position to about 33 000 acres. Tese newly-acquired acres are located in the condensate trend in La Salle County, Texas. Te up-front cash cost associated with these acquisitions is approximately US$1650 per acre. Te remainder of the lease acquisition costs will be in the form of a drilling carry that will fund certain of its partners’ share of development costs, where applicable, in the acreage and will be dependent on the timing and density of development drilling on the properties. In order to further accelerate its Eagle Ford Shale
activity, the company’s remaining Barnett Shale rig has been relocated to South Texas and is now on location drilling the Ivey Ranch 10H in Dimmit County. Current plans call for this rig to remain in the Eagle Ford until it is replaced by a new purpose- built rig currently scheduled for arrival in December 2011, at which time the H&P #332 rig will return to its drilling schedule in the Barnett. Given the current backlog of wells waiting on completion in the Barnett Shale, the company believes this rig move should have no impact on estimated 2011 Barnett production. Te company’s newest rig, a purpose-built H&P
Flex 3S, just arrived in the Eagle Ford and is drilling on its recently acquired RPG project in north
western McMullen County. Te company currently has three rigs drilling on its Eagle Ford properties. Although Carrizo expects the number of Eagle Ford wells drilled during 2011 to increase above projections due to this rig relocation, uncertainty associated with the timing of well completions and initiation of oil sales precludes the company from increasing its previous guidance for 2011 oil production until a frac schedule is finalised. Te three wells waiting on completion located on the Mumme lease in LaSalle County are scheduled for fracture stimulation shortly. In the Marcellus shale, Carrizo now has eight
gross wells drilled waiting on completion in Susquehanna and Wyoming Counties. Stimulation and completion of the back-log of drilled wells is scheduled to begin in July, while first gas sales from Susquehanna County are expected to begin in August following completion of the Laser pipeline.
Completing one well per week Cabot Oil & Gas has announced its intention to complete one well per week through to the end of the year in its Marcellus operation. Tis effort was successful although weather at year-end and a stream-crossing delay slowed several wells from being turned in line. During this period 10 wells were completed with five wells flowing to sales and five wells waiting on pipeline. “Tese five wells, which were turned in line, had
an average 30-day production rate of 6 Mmcf per day,” stated Dan O Dinges, chairman, president and ceo. “Included in this population was the company’s first horizontal Purcell limestone test that had a 30-day production rate of 7.3 Mmcf
Fracturing and stimulation vessel B
aker Hughes has launched its state-of-the-art fracturing and
stimulation vessel, the Blue Tarpon. Te 300-foot ship, one of the world’s largest stimulation vessels and the seventh vessel in the Baker Hughes fleet, is designed to provide high- rate and high-volume stimulation treatments for demanding offshore operations. With one of the largest proppant and fluid-carrying capacities in the world, the ABS class-certified ship can perform complex, multiple-zone completions without travelling back to port for resupply. “Te Blue Tarpon is designed to
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provide operators with redundancy on all key elements of the stimulation plant,” says Derek Mathieson, president of products and technology for Baker Hughes. “Enhanced safety systems, as well as redundant back-up blending and pumping capabilities, have been installed to reduce the risks associated with performing multizone, high-rate, high-pressure completions. Te ship also was designed with a focus on reliability and efficiency, allowing operators to minimise delays and associated operating expenses in high- cost offshore environments,” he notes. With a maximum pump rate of 80bbl/min, proppant capacity of 2.1
million pounds, and accommodation for up to 44 people, the vessel is designed to perform round-the-clock operations in deepwater plays. Its ten separate high-pressure pump units - housed in a fully enclosed structure to protect the equipment from the environment - can deliver up to 24 000 hydraulic horsepower and pump up to 32 000 pounds of proppant per minute. Te Blue Tarpon also features a DP-2 dynamic positioning system with twin bow thrusters and a stern thruster specifically designed to operate safely in the widest possible weather and sea conditions. ●
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