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This map shows the subcrop pattern of the Mesozoic rock units present at the top Mesozoic unconformity (also commonly referred to as the base Tertiary unconformity) in Cook Inlet basin, Alaska. The subcrop is projected onto the top Mesozoic unconformity depth surface of Cook Inlet basin, Alaska, published by Shellenbaum and others (2010). Publicly available geologic and geophysical data from multiple sources were collected, interpreted, and integrated into the subcrop map. Formation picks at the top Mesozoic unconformity were determined for 109 wells. Mesozoic horizons from two regional marine two-dimensional (2-D) seismic datasets (approximately 3,300 miles) were interpreted. Eight map units were established for...
The State of Alaska Division of Geological & Geophysical Surveys (DGGS) and Division of Oil & Gas (DOG) are currently engaged in a multi-year study of the hydrocarbon potential of the Tertiary and Mesozoic strata in Cook Inlet basin. Modal analyses and routine core analyses were performed on Tertiary and Mesozoic siltstones and sandstones collected during the 2007-2010 field seasons from six geographic areas in upper and lower Cook Inlet. The reservoir quality of Cook Inlet sandstones varies widely depending on their mineralogy, geologic age, burial depth, and depositional environment. Tuxedni and Naknek sandstones have poor reservoir quality and are likely to be of equally poor quality down dip. West Foreland sandstones...
The State of Alaska Division of Geological & Geophysical Surveys (DGGS) is currently engaged in a multi-year study of the hydrocarbon potential of the Tertiary and Mesozoic strata in Cook Inlet basin. This report summarizes mercury injection capillary pressure (MICP) data for 38 outcrop samples collected from the Tyonek, Beluga, and West Foreland Formations in the Tyonek and Talkeetna quadrangles. All samples were collected from measured stratigraphic sections. The Tyonek Formation samples have unimodal pore systems and the majority have well defined to sharp intrusion profiles. The Beluga Formation samples are characterized by unimodal pore systems and relatively broad intrusion profiles. The West Foreland Formation...
The State of Alaska Division of Geological & Geophysical Surveys (DGGS) is currently engaged in a multi-year study of the hydrocarbon potential of the Tertiary and Mesozoic strata in Cook Inlet basin. This report summarizes mercury injection capillary pressure (MICP) data for 19 samples collected from the Indecision Creek Member of the Naknek Formation and the Kaguyak Formation type section. All samples were analyzed by PetroTech Associates, Houston, TX. PetroTech Associates found that the Kaguyak rocks were generally less porous and permeable compared to the Naknek, although there is some overlap in values. The capillary pressure data for this publication is provided in its native spreadsheet format. The manuscript...
This publication provides mercury injection capillary pressure (MICP) data for 36 outcrop samples collected from the Kaguyak, Naknek, and West Foreland formations in the Iniskin Peninsula region of Cook Inlet. The publication files provide: sample names, coordinates, and the formation from which samples were collected; per-sample pore aperture size distribution charts; formation pore volume graphs and data; pore system properties of each formation from which samples were analyzed; and correspondence from PetroTech Associates describing the methods used in MICP analyses of the samples, and a brief summary of the data
The State of Alaska Division of Geological & Geophysical Surveys (DGGS) is currently engaged in a multi-year study of the hydrocarbon potential of the Tertiary and Mesozoic strata in Cook Inlet basin. This report summarizes mercury injection capillary pressure (MICP) data for nine outcrop and measured section samples collected from the Naknek Formation on the Iniskin Peninsula in Cook Inlet. All samples were analyzed by PetroTech Associates, Houston, TX. Two of the samples were found to have overall capillary properties that would make them moderately good quality, Type B seals.
This Raw Data File provides lithologic descriptions of core fragments recovered from a series of core holes drilled by Exxon (mid-80s) in the uplands bordering the Yukon Flats basin. In addition to descriptions of the material, the tabulated file includes geographic location, core hole numbers, an age estimate, core fragment depth, general lithology, grain size, and facies interpretation. The author examined these core materials in Fairbanks during winter and spring 2002. This work was done in preparation for an assessment carried out by the U.S. Geological Survey of undiscovered, technically recoverable hydrocarbon resources in the Yukon Flats basin.
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