Brooks Range Petroleum indicated in late January 2018 that the November 2017 flow test on the re-entered North Tarn 1A well, sited in ADL 390680 (Southern Miluveach Unit) on the North Slope, demonstrated an average peak flow rate of 1,292 bo/d (24deg API), with only trace amounts of water. The oil was produced from the Kuparuk C Formation, one of the reservoir rocks in the adjacent Kuparuk River Field. According to estimates from independent engineering firm DeGolyer and MacNaughton, the unit has 2P reserves of 33 MMbo. North Tarn 1, was drilled in April 2011 on the Mustang pad to a depth of 1,889m. Brooks Range conducted its testing of the well using fracture stimulation and an associated flow test. The purposes of this test was to obtain certification of the well as capable of production in paying quantities, therefore prolonging the life of the unit beyond 2017, when the leases in the unit reached the ends of their primary terms. The Mustang pad is located close to the Alpine oil pipeline: The development plan for the field involves connecting an export pipeline from the field to the Alpine line. Brooks Range's plan also envisages development drilling restarting at the beginning of August 2018. The plan would lead to first oil from the field in Q2 2019.
North Tarn 001A op. by AVCG LLC (24%, Ramshorn 40%, Eni 20%, Brooks Range 16%) in ADL 390680 contract, tested with average peak flow rate of 1293 bo/d from Kuparuk C Fm.