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Alaska geo survey latest Billions of barrels undiscovered

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    Alaska geo survey releases annual report l EXPLORATION & PRODUCTION

    Division of Geological & Geophysical Survey annual report includes 2019 fieldwork on North Slope Nanushuk, Torok, Seabee formations

    Further, a large structure-from-motion survey was done of the Nanushuk and Torok formations at Slope Mountain for use as a base for mapping reservoir-scale sand bodies, and in modelling their seismic response (seismic forward modelling) to better understand the seismic signature of the Brookian Nanushuk oil reservoir sands in the subsurface at the big Willow and Pikka fields.

    Masterman says indications are that 2020 will be another “impactful” year. Among others, projects already in the planning stages include drilling four stratigraphic core holes into Brookian reservoir and source rocks, expansion of data collection under ASTAR, with additional data acquisition for sand and gravel resources, and petroleum geology. Additional core workshops are planned at the GMC to advance industry understanding of the North Slope’s Brookian reservoir rocks.

    Billions of barrels undiscovered

    Northern Alaska continues to garner attention as one of the most prolific hydrocarbon provinces in North America,with 28 billion barrels of oil equivalent discovered to date onshore, and an estimated 30 billion barrels of oil and 181 trillion cubic feet of non-associated gas in undiscovered, but technically recoverable accumulations, said DGGS’ annual report, quoting the U.S. Geological Survey 2012 assessment.

    “Understanding the petroleum geology of this region is critically important for making new discoveries. To promote new exploration investment and reduce exploration risk, the Energy Resources Section conducts applied research on North Slope petroleum geology. Results of this work are published as high-quality geological maps and topical research reports that are available to the public at no cost,” said DGGS’annual report.

    The section has a long history of public outreach in the form of core workshops and field tours. In July 2019, it led a two-day-long tour that focused on key outcrops of the Nanushuk, Torok, Seabee, Canning,Schrader Bluff and SagavanirktokDGGS’ annual report. The section has a long history of public outreach in the form of core workshops and field tours. In July 2019, it led a two-day-long tour that focused on key outcrops of the Nanushuk, Torok, Seabee,Canning, Schrader Bluff and Sagavanirktok formations in the central foothills that was “well attended by
    industry petroleum geology its and geophysicists,” DGGS said.

    The tour visited outcropping deltaic sand bodies in the Nanushuk and Schrader Bluff formations that “represent valuable analogues for large oil accumulations in the subsurface” and state geologists “discussed key features that influence reservoir quality” with participants. Oil-stained “sandstones in the Seabee formation and immediately overlying organic-rich clay shales and oil-saturated silicified tuffs in the Hue shale were examined highlighting their function as a reservoir-source couplet,” the report said. The tours “allow DGGS scientists to share their insights on the region’s petroleum geology, and for a general sharing of information among participating industry representatives,” promoting discovery and production of Alaska’s hydrocarbon resources and spurring exploration investment and development success by “providing unique, high-quality outcrop analogue information that reduces exploration risk,” DGGS said The survey’s annual report can be viewed online at:

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