Alaska Department of Administration

Alaska Oil and Gas Conservation Commission

AOGCC Pool Statistics

Badami, Undefined Oil Pool


Operator
SAVANT ALASKA LLC
Discovery Well
SAVANT ALASKA LLC
BADAMI UNIT B1-38
Permit No.208-190
API No. 50-029-23407-00-00
Sec. 9, T9, R20E, UM
Depth: 15555' MD / 12097' TVD
February 9, 2010
Map Image Unavailable

Summary

Hydrocarbons in the Killian sands were first encountered during March of 1971 between 11,524 and 11,565 feet measured depth (MD) in the East Mikkelsen Bay State No. 1 exploratory well, which is located one-half east of the current Badami Unit boundary.1 Drill Stem Test No. 1, conducted between 11,552 and 11,564 feet MD, recovered 39 barrels of 24.1° API oil. The testing tool was open for 5 hours and 11 minutes.2

The sandstone reservoirs that constitute the Badami Undefined Oil Pool were first encountered by the Badami B1-38 well that was drilled and completed by Savant in 2009 and 2010. This well—the only production well in the Badami Undefined Oil Pool—began regular oil production on November 5, 20103, and it peaked that same month at 414 barrels per day (BOPD). During 2012 the pool averaged 229 BOPD, and by 2015 the average production rate declined to 165 BOPD.4

Production

Geology

In the Badami Area, the Killian sands are some of the many small, complex, late Cretaceous-aged, Brookian reservoirs that occur within the Canning Formation. These reservoirs consist of sandstone and siltstone deposited as amalgamated turbidite channels and coeval discontinuous, thin beds within a mudstone-dominated, deep, submarine slope and toe-of-slope environment.5

In East Mikkelsen Bay State No. 1, the Killian sands are about 41 feet thick and the drilling rate of penetration curve suggests that, in this well, the Killian comprises three stacked “lobes” that are (in ascending order) 15, 5, and 9 feet thick and separated by mudstone intervals that are 2 and 10 feet in thickness. The gamma ray curve suggests the lowest and thickest lobe consists of three amalgamated channel deposits. The upper two Killian lobes consist of sandstone and sandy siltstone that grade upward into mudstone. The onsite mud logging geologist described samples from the Killian interval as very fine- to fine-grained, very calcareous, cemented sandstone that is hard to occasionally friable, stained dark brown, and yields dark brown solvent cut. Under ultraviolet light, these samples displayed trace amounts to 30 percent dull gold fluorescence and bright, blue-white solvent-cut fluorescence. While drilling, large quantities of associated gas (2,380 to 3,200 units of total gas) were recorded, which cut the drilling mud weight from 11.3 to 9.1 pounds per gallon. These gases contained methane through pentane.6

Six miles to the west, Savant Alaska, LLC’s (Savant) encountered similar sandstone deposits at approximately the same stratigraphic position in the Badami B1-38 exploratory well. In well B1-38, the amalgamated Killian sands occur between 14,436 and 14,492 feet MD, and they are about 48 feet thick. While drilling this interval using 9.9 pound per gallon mud, large quantities of associated gases (up to 5,400 units of total gas) were recorded. These gases contained methane through pentane.7

Inspection of the formation density well log curve suggests that the Killian encountered by well B1-38 comprises four main lobes of sand that range in thickness from 7 to 18. The mud logging geologist described the sandstone as very fine- to fine-grained, subangular to angular, well sorted, friable in part, with dark yellow-orange fluorescence under ultraviolet light. Savant perforated the Killian interval from 14,438 to 14,498’ MD, flowed the well for six hours, and obtained fluids samples.8 Reservoir and fluid properties provided by Savant are: oil saturation 75%, API gravity 29°, GOR 800, average porosity 22%, estimated permeability 100 millidarcies.9


Last Revised
16 Mar 2016 SFD

1Humble Oil and Refining Company, 1971, Well Log and Mud Log, East Mikkelsen Bay State No. 1, AOGCC Well History File No. 170-057; 11,524 and 11,565 feet measured depth are equivalent to depths of 11,486 and 11,527 feet true vertical feet below sea level.
2Humble Oil and Refining Company, 1971, Alaska Oil and Gas Conservation Commission Well History File No. 170-057, p. 33
3Savant Alaska, LLC, 2011, Well History File for B1-38, Alaska Oil and Gas Conservation Commission Well History File No. 208-190, p. 40
4Alaska Oil and Gas Conservation Commission, 2016, Well Information and Production Database
5State of Alaska DNR, Division of Oil and Gas, 2013, Approval, in Part, of the First Expansion of the Badami Unit, Director's Decision issued March 15, 2013
6Humble Oil and Refining Company, 1971, Mud Log, East Mikkelsen Bay State No. 1, Alaska Oil and Gas Conservation Commission Well History File No. 170-057
7Halliburton, 2010, Mudlogger’s Morning Report for January 27, 2010, in Alaska Oil and Gas Conservation Commission Well History File No. 170-057, p. 552
8Savant Alaska, LLC, 2011, Well Completion or Recompletion Report and Log, AOGCC Well History File No. 208-190. In this well, 14,436 and 14,493 feet MD are equivalent to 11,015 and 11,063 feet true vertical feet below sea level.
9Savant Alaska, LLC, 2011, Application for Sundry Approvals No. 311-040, Alaska Oil and Gas Conservation Commission Well History File No. 208-190, p. 92 – 95