Download or read book Petrographic and Microfacies Analysis of the Shublik Formation Northern Alaska written by April Rae Knox and published by . This book was released on 2018 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: The North Slope of Alaska includes a world-class conventional petroleum system that has been producing for approximately 40 years. While the regional stratigraphy includes multiple proven source and reservoir rocks, the Middle to Upper Triassic Shublik Formation (Fm.) is the most prolific. The decline in conventional hydrocarbon production on the North Slope and the presence of high quality source rocks inspire the evaluation of the Shublik Fm. as an unconventional petroleum system where oil or gas are produced directly from source rocks. The Shublik Fm. is a heterogeneous calcareous shale and limestone interval that has been interpreted to indicate deposition influenced by marine upwelling. Lithofacies observed in outcrop consist of intervals of non-resistant organic-rich packages that are interbedded with resistant coarsening upward rhythmic depositional successions of phosphatic and carbonate parasequences. The heterogenous characteristics of the microfacies is one of the challenges in the unconventional exploration of the Shublik Fm. Detailed microfacies descriptions, as part of this study, document the complex lithologies and identify patterns in the occurrence of the microfacies. Microfacies descriptions are the building blocks to identify stacking patterns that define the parasequences. The parasequences observed in core, outcrop, and petrographic analysis are calibrated to well logs to map relevant stratigraphic intervals on a regional scale. A targeted interval for the unconventional exploration of the Shublik Fm. is identified using a relative brittleness index. Flat clam and phosphatic parasequences are the primary packages present within the targeted interval. The parasequences are comprised of small-scale brittle and ductile couplets. High resolution pore imaging and mechanical stratigraphy characteristics are documented within the interval. Pore types and networks provide potential storage and migration pathways within unconventional resource systems. Pore types were imaged at a high resolution using scanning electron microscopy. Pore types that are present within the Shublik Fm. include interparticle, intraparticle, porous floccules, moldic, microfracture, and microchannel. The phosphatic limestone facies contains the greatest amount of porosity including interparticle, intraparticle, and moldic within the phosphate nodules and matrix and fractures surrounding phosphate nodules. Microfracture, microchannel, and intraparticle porosity are the primary pore types within the flat clam facies. Mechanical stratigraphy has a direct impact on the success of hydraulic fracturing. The microfacies descriptions identify laminae scale mechanical stratigraphy characteristics which include erosional surfaces, laminations, graded bedding, mineralogical variation, and textural anisotropy and isotropy. A regional correlation of the targeted interval was developed building upon previous work and utilizing sequence stratigraphic models. Significant parasequence surfaces are readily identified in the well log signatures. The challenge of the heterogeneity of the Shublik Fm. is simplified first by identifying a targeted interval consisting of brittle and ductile packages enriched in TOC. Then recognizing the parasequences contained as part of the interval which include significant characteristics pertaining to pore networks and mechanical stratigraphy. Combining methods and results of this study provides an important component to evaluating the Shublik Fm. as a potential unconventional resource system.
Download or read book Availability of Petrographic Thin sections from Thirty five Wells from National Petroleum Reserve in Alaska North Slope Alaska written by Arthur Leroy Bowsher and published by . This book was released on 1981 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Shublik Formation Rocks from Mt Michelson Quadrangle Alaska written by Robert L. Detterman and published by . This book was released on 1970 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Shublik Formation and adjacent strata in northeastern Alaska written by Harry Allison Tourtelot and published by . This book was released on 1971 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Subsurface Stratigraphic Structural and Economic Geology Northern Alaska written by Florence Rucker Collins and published by . This book was released on 1967 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paleoenvironmental Reconstruction of the Shublik Formation on the North Slope of Alaska written by Anne Saffell Dingus and published by . This book was released on 1984 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gubik Formation of Quaternary Age in Northern Alaska written by Robert Foster Black and published by . This book was released on 1964 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Geological Seminar on the North Slope of Alaska written by W. L. Adkison and published by . This book was released on 1970 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surface to Subsurface Correlation of the Shublik Formation written by Eric M. Hutton and published by . This book was released on 2014 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Middle to Late Triassic Shublik Formation in northern Alaska is the dominant source rock for Prudhoe Bay, the largest conventional hydrocarbon accumulation in North America, and is being studied as an unconventional reservoir because of recent shale oil exploitation in North America. This heterogeneous shale unit in the subsurface of northern Alaska provides insight on the evolution of upwelling systems during relative sea level change over geologic time. The accumulation, dilution, and more importantly preservation of organic matter are linked to relative changes in sea level, shelf bathymetry and paleoredox conditions. Multiple well correlations and isochore maps indicate thickness trends were influenced by topographical features and relative sea level during the Middle-Upper Triassic in northern Alaska. Sedimentary features, primary production, Corg preservation and oxygen concentrations were controlled by the upwelling-influenced position of the oxygen minimum zone during fluctuations in relative sea level. The Shublik Formation is a world class resource play with Corg concentrations up to 10 wt. % within the predominantly carbonate mudstone to wackestone transgressive systems tracts. Previous sequence stratigraphic interpretations of Middle-Upper Triassic deposits in northern Alaska indicate three, 3rd order depositional sequences. Evaluation of the closely spaced samples and general trends in lithology has led to a revised sequence stratigraphic architecture that includes an additional fourth depositional sequence in comparison to previous interpretations.
Download or read book Alaska North Slope Oil Rock Correlation Study written by Leslie B. Magoon and published by . This book was released on 1985-01-01 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surficial Geology and Morphology of the Alaskan Central Arctic Coastal Plain written by S. E. Rawlinson and published by . This book was released on 1993 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Subsurface Stratigraphic Structural and Economic Geology Northern Alaska written by Florence R. Collins and published by . This book was released on 1959 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Subsurface Facies Architecture and Sequence Stratigraphy of the Eileen Sandstone Shublik Formation and Sag River Sandstone Arctic Alaska written by Erik Jason Hulm and published by . This book was released on 1999 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Upper Triassic through Lower Jurassic on Alaska's North Slope is a critical stratigraphic interval underlying a major sequence boundary between pre-rift and syn-rift mega-sequences. This study is a subsurface analysis of the units immediately underlying this boundary to better understand the paleogeography, depositional controls, and timing of initial extension associated with rifting to form the Canada Basin. Well data from across the North Slope were utilized to describe and interpret the facies architecture, depositional setting, and sequence stratigraphy of the Eileen sandstone, Shublik Formation, and Sag River Sandstone. The stratigraphic interval was subdivided into three depositional sequences deposited during three episodes of relative sea-level rise and fall. The sequences correlate with eustatic sea-level curves, implying eustatic sea-level change was a depositional control. Pronounced along-strike thickness variations of sequence geometries has identified a series of paleohighs that also influenced depositional patterns and potentially represent the earliest signals of rift-related tectonism"--Leaf 3.
Download or read book Preliminary Detailed Stratigraphic Sections of the Carboniferous Lisburne Group Central Shublik to the Northern Franklin Mountains Northeastern Alaska written by Alaska. Division of Geological and Geophysical Surveys and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sedimentology and Petrography of the Shelikof Formation Alaska Peninsula written by William H. Allaway (Jr) and published by . This book was released on 1982 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geology of the Ahngayakasrakuvik Creek Area Romanzof Mountains Alaska written by Ralph S. Bunnell and published by . This book was released on 1959 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tertiary Formations and Associated Mesozoic Rocks in the Alaska Peninsula Area Alaska and Their Petroleum reservoir and Source rock Potential written by Alaska. Division of Geological and Geophysical Surveys and published by . This book was released on 1979 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
