- North Shore #1 Sag River Formation Test Results
- Tofkat #1 MDT Recovered Oil Results
- Ten Oil Samples Recovered In Four Different Sandstones
- 42 Degree API Oil Sampled In The Kuparuk Formation
TG World Energy Corp. today announced an update on the Alaska Central North Slope winter 2008 exploration program, which was recently completed by the project operator, Brooks Range Petroleum Corporation ("BRPC" or the "Operator").
North Shore #1
The Nabors 27E drilling rig was released from contract on May 7, 2008. For the preceding 15 days, the rig had been conducting fishing operations for coiled tubing stuck in the North Shore #1 borehole; a 700 foot portion of the tubing was successfully recovered, but the warming weather has made it necessary to suspend the well and leave the remaining tubing in the hole.
The North Shore #1 encountered oil pay in the Ivishak and Sag River Formations. In February 2008, the Ivishak tested 2,092 barrels per day of 34 degree API oil. The coiled tubing became stuck in the hole before a production test could be conducted on the Sag River Formation; a zone with approximately 20 feet of oil pay with no water line encountered. The unsuccessful fishing operation (intended to restore full access to the Sag River Formation) did not allow for a conclusive formation test. With coiled tubing stuck across the zone of interest, diesel was pumped into the well, which was then opened to flow. The well flowed for 18 hours at an average rate of 50 barrels per day of diesel cut oil. Pressure transient analysis of the flow test and several step-rate pump-in tests indicate that the 22 foot interval of completion perforations was severely damaged. Predicted rates with no damage to the perforations were calculated by the Operator to be 10 to 20 times the actual rate or 500 to 1,000 barrels of oil per day. Development planning work has begun to determine the optimal recompletion or sidetrack strategy for North Shore #1, in the context of an overall commercialization plan. Specific well work to confirm commercial rates from this well are being formulated. TG World has a 35% working interest in the North Shore #1 well and in the Gwydyr Bay prospect area.
Tofkat #1
As previously announced, the Tofkat #1 well was suspended as a potential oil discovery.
The Kuparuk oil properties are similar to the Kuparuk Nanuq field oil; this zone has an indicated six feet of net pay in the Tofkat #1 well. The Brookian Turbidite light oil zone appears to be in a low porosity reservoir where penetrated; this formation is productive in nearby fields where better sandstone facies are developed. The heavier oil properties for the two shallower reservoirs are characteristic for the North Slope; these sands were in low porosity reservoirs where penetrated, but are productive in nearby fields where better sandstone facies are developed. The 3-D seismic survey acquired this winter will be mapped for indications of offsetting areas of better quality reservoir development to these oil zones. TG World has a 25% working interest in the Tofkat #1 well and in all on-trend lands in the Tofkat prospect area.
Source: Business Wire