Map and database of exploration drilling targets categorized by play type, North Slope and offshore Arctic Alaska

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Frequently anticipated questions:


What does this data set describe?

Title:
Map and database of exploration drilling targets categorized by play type, North Slope and offshore Arctic Alaska
Abstract:
Miscellaneous Publication 167, Map and database of exploration drilling targets categorized by play type, North Slope and offshore Arctic Alaska, presents a compilation of discovery well and production data for oil and gas wells throughout the North Slope and offshore Arctic Alaska. Since exploration drilling began on the North Slope of Alaska in 1944, numerous oil and gas accumulations have been discovered and 18 billion barrels of liquid hydrocarbons have been produced from North Alaska through 2018. Wells have targeted five main play types: Ellesmerian clastics and carbonates (Kekiktuk, Lisburne, Ivishak, Shublik, and Sag River), Jurassic shoreface sands (Barrow, Simpson, Kugrua, Nechelik, Nuiqsut, and Alpine), Cretaceous rift sands (Walakpa, Kuparuk, Put River, Kemik, and Thomson), Brookian turbidites (Torok, Seabee, and Canning), and Brookian topsets (Nanushuk, Tuluvak, Schrader Bluff, West Sak, Ugnu, Prince Creek, and Sagavanirktok). A sixth category called 'Other' includes the remaining targets (e.g., basement, methane hydrates, and coalbed methane). This comprehensive study documents the drilling target by play type from public domain sources for 548 exploration wells on the North Slope and adjacent offshore areas in the Beaufort Sea and Chukchi Sea. The discovery well and production data for each producing pool are integrated into the study. All files are available from the DGGS website: http://doi.org/10.14509/30579.
Supplemental_Information:
well-data:    A compilation of discovery well and production data for each producing pool in shapefile format
  1. How might this data set be cited?
    Gregersen, Laura, and Brown, Garrett, 2021, Map and database of exploration drilling targets categorized by play type, North Slope and offshore Arctic Alaska: Miscellaneous Publication MP 167, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 15 p., 4 sheets
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -166.1755
    East_Bounding_Coordinate: -140.5906
    North_Bounding_Coordinate: 72.4966
    South_Bounding_Coordinate: 67.8660
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2018
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: shapefile
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Vector data set.
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: State Plane Coordinate System 1983
      State_Plane_Coordinate_System:
      SPCS_Zone_Identifier: 5004
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.9999
      Longitude_of_Central_Meridian: -150
      Latitude_of_Projection_Origin: 54
      False_Easting: 1640416.666666667
      False_Northing: 0
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.6096
      Ordinates (y-coordinates) are specified to the nearest 0.6096
      Planar coordinates are specified in meters
      The horizontal datum used is NAD83.
      The ellipsoid used is GRS 80.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257222101000025.
  7. How does the data set describe geographic features?
    mp167-well-data.shp
    A compilation of discovery well and production data for each producing pool in shapefile format (Source: Alaska Division of Oil & Gas)
    WellID
    Well API number (Source: this report) String
    WellName
    Well name (Source: this report) String
    BRKNTopSym
    Flag to indicate that the well intercepts a Brookian topset target; symbology for Brookian topset, 1 = target (Source: this report) Double
    BRKNTurSym
    Flag to indicate that the well intercepts a Brookian turbidite target; symbology for Brookian turbidite, 1 = target (Source: this report) Double
    CRCSriftSym
    Flag to indicate that the well intercepts a Cretaceous rift target; symbology for Cretaceous rift, 1 = target (Source: this report) Double
    ELSMSsym
    Flag to indicate that the well intercepts an Ellesmerian target; symbology for Ellesmerian, 1 = target (Source: this report) Double
    JRSCSsym
    Flag to indicate that the well intercepts a Jurassic target; symbology for Jurassic, 1 = target (Source: this report) Double
    OtherSsym
    Flag to indicate that the well intercepts other targets; symbology for other target, 1 = target (Source: this report) Double
    BRKNTopFmN
    Formation names of Brookian topset targets; formation names of Brookian topset targets (Source: this report) String
    BRKNTurFmN
    Formation names of Brookian turbidite targets; formation names of Brookian turbidite targets (Source: this report) String
    CRCSriftFmN
    Formation names of Cretaceous rift targets; formation names of Cretaceous rift targets (Source: this report) String
    ELSMFmN
    Formation names of Ellesmerian targets; formation names of Ellesmerian targets (Source: this report) String
    JRSCSFmN
    Formation names of Jurassic shoreface targets; formation names of Jurassic shoreface targets (Source: this report) String
    OtherFmN
    Formation names of other targets; formation names of other targets (Source: this report) String
    PubSource
    Public source and availability of target data; public source and availability of target data (Source: this report) String

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
  2. Who also contributed to the data set?
    The authors gratefully acknowledge Kelsey Anderson and Joseph Skutca for their early contributions to the exploration target research in NPRA and state lease sale regions. The authors also gratefully acknowledge Kirk Sherwood for guiding us through the federal data request process for Outer Continental Shelf (OCS) well data. Significant improvements were made to the map from feedback and discussions with Kirk Sherwood, Paul Decker, Don Krouskop, Steve Moothart, Kevin Frank, Dan Seamount, Steve Davies, Meredith Guhl, David Boyer, Jhonny Meza, and Maduabuchi (Pascal) Umekwe. The map benefited from cartographic expertise provided by Sean Conlon and Marta Mueller.
  3. To whom should users address questions about the data?
    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    3354 College Road
    Fairbanks, AK
    USA

    (907)451-5020 (voice)
    (907)451-5050 (FAX)
    dggspubs@alaska.gov
    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
    Contact_Instructions:
    Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.

Why was the data set created?

The DGGS Energy Resources Section generates new, unbiased information on the geologic framework of frontier areas in Alaska that may host undiscovered oil, gas, coal, and geothermal resources. Northern Alaska is a world-class petroleum province that includes some of North America's most prospective onshore regions. Despite this potential, the North Slope remains underexplored relative to other sedimentary basins around the world. New exploration ventures are hampered by the limited amount of published geologic data, and much of the available information is reconnaissance in nature. This comprehensive study documents the drilling target by play type from public domain sources for 548 exploration wells on the North Slope and adjacent offshore areas in Beaufort and Chukchi Seas.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 2018 (process 1 of 1)
    Source information - All exploration target data integrated into this study are from public sources. The primary public domain data sources are state and federal well histories, Alaska Division of Oil and Gas (DOG) unit decisions, Petroleum News articles, Alaska industry news articles, federal well summary reports, and lessee press releases. The authors used an iterative process to collect and review exploration target data. The first step was to gather exploration target information from any possible public source, document the findings, and record a link and page number(s) of where the exploration target data are stated. Then, the authors verified each exploration target and cited the reference. If the target was directly stated or the inferred target could be deduced from the supporting public data, the target was placed into a play type category. Otherwise, the authors conducted an additional search of public data so a satisfactory drilling target could be identified or inferred. Well location coordinates were pulled from Alaska Oil and Gas Conservation Commission (AOGCC), Alaska Division of Oil and Gas, and Bureau of Ocean Energy Management (BOEM) databases. Well locations utilized in this compilation are derived from the AOGCC calculated bottom hole locations (BHL) unless BHL values were not reported in the source data. In cases with unknown BHL values, we used AOGCC surface hole locations (SHL) or location coordinates provided by BOEM. The AOGCC database provides locations using the NAD27 geographic coordinate system. The authors converted coordinate values to NAD83, State Plane, Zone 4. A comprehensive list of data sources is provided in the accompanying report.
  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    The analyses reported here reflect the protocols and uncertainties described in the accompanying report. Inferences and information presented in this compilation relied upon publicly available well histories (as of 2018) as well as the formation picks available at the Alaska Division of Geological & Geophysical Surveys Geologic Materials Center. For this reason, the database may be missing exploration drilling targets that the operator identified as an objective but did not report in publicly available records.
  2. How accurate are the geographic locations?
    Well location coordinates were pulled from Alaska Oil and Gas Conservation Commission (AOGCC), Alaska Division of Oil and Gas, and Bureau of Ocean Energy Management (BOEM) databases. Well locations utilized in this compilation are derived from the AOGCC calculated bottom hole locations (BHL) unless BHL values were not reported in the source data. In cases with unknown BHL values, we used AOGCC surface hole locations (SHL) or location coordinates provided by BOEM. The AOGCC database provides locations using the NAD27 geographic coordinate system. The authors converted coordinate values to NAD83, State Plane, Zone 4 to facilitate map cartography. Data reprojection introduced small geographic offsets between this dataset and the source data. Given the regional extent of this work, these offsets are inconsequential relative to the overall findings.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    This publication is a DGGS Miscellaneous Publication (MP). The MP series is intended for reports that provide compilations of previously published information. The data and interpretations have been reviewed by several scientists familiar with the geologic context. This data release is complete but limited to publically available information posted before 2018.
  5. How consistent are the relationships among the observations, including topology?
    Not applicable

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints:
This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).
Use_Constraints:
Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
  1. Who distributes the data set? (Distributor 1 of 1)
    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    3354 College Road
    Fairbanks, AK
    USA

    (907)451-5020 (voice)
    (907)451-5050 (FAX)
    dggspubs@alaska.gov
    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
    Contact_Instructions:
    Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.
  2. What's the catalog number I need to order this data set? MP 167
  3. What legal disclaimers am I supposed to read?
    The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 12-Oct-2021
Metadata author:
Alaska Division of Geological & Geophysical Surveys
Attn: Simone Montayne
Metadata Manager
3354 College Road
Fairbanks, AK
USA

(907)451-5020 (voice)
(907)451-5050 (FAX)
dggspubs@alaska.gov
Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.9.50 on Mon Oct 11 19:21:53 2021