ConocoPhillips has successfully tested oil in exploration well Tinmiaq 8, a vertical borehole designed to appraise the recent 300 MMbo Willow discovery. The Tinmiaq 7 well was drilled to a final TD of 1,262m in lease AA092673, according to reports in April 2018. The well forms part of a six-well programme, All of which have encountered oil, with reportedly "encouraging" results having been gleamed from related flow tests. In mid-January 2017, ConocoPhillips indicated that the Willow discovery had been made in the federal National Petroleum Reserve-Alaska (NPR-A), with oil encountered in both the Tinmiaq 2 and Tinmiaq 6 exploration wells. The discovery was made in the Brookian Nanushuk Formation, the same formation in which Armstrong Energy and Repsol recently began developing a discovery in the Pikka Unit, estimated to be able to produce 120,000 bbls/d. The Tinmiaq 2 well sustained a 12-hour test rate of 3,200 bo/d. Consequently, ConocoPhillips expects the recoverable potential of the resource to be over 300 MMbo. Appraisal began in January 2017 and a 3D seismic survey is currently being acquired over the area. The Willow Field could produce up to 100 Mbbls/d, with commercial production potentially starting as early as 2023. Tinmiaq 2 and 6 are located in NPR-A leases AA00081807 and AA00081808 respectively, part of the GMT Unit. The GMT Unit is operated by ConocoPhillips Alaska (78% WI + Op), with Anadarko Petroleum holding a 22% interest.
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