Petrology and reservoir potential of Tertiary and Mesozoic sandstones, Cook Inlet, Alaska: A preliminary analysis of outcrop samples collected during 2007-2010 field seasons

Description

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 examined have poor reservoir quality and are negatively influenced by their immature volcanic mineralogy. The Hemlock and Tyonek sandstones have good to excellent reservoir quality, largely resulting from their quartzose-feldspathic mineralogy that is physically and chemically stable and burial depths generally less than 3,000 m. It should be emphasized that our observations are based on a limited number of outcrop samples collected from widely dispersed localities.

Resources

Name Format Description Link
0 http://dx.doi.org/10.14509/20163
0 http://dx.doi.org/10.14509/20161
0 http://dx.doi.org/10.14509/20481
0 http://dx.doi.org/10.14509/18241
0 http://dx.doi.org/10.14509/21961
0 http://dx.doi.org/10.14509/23723
0 http://dx.doi.org/10.14509/19503
0 http://dx.doi.org/10.14509/15774
0 http://dx.doi.org/10.14509/20162
0 http://dx.doi.org/10.14509/25035
0 CSDGM IMPORT ERROR: No digtinfo/formcont http://dx.doi.org/10.14509/25035
0 http://dx.doi.org/10.14509/20164
0 http://dx.doi.org/10.14509/19641
0 http://dx.doi.org/10.14509/20165

Tags

  • tyonek quadrangle
  • matanuska valley
  • sand
  • paleogene
  • tectonics
  • outcrop samples
  • sample location
  • hemlock formation
  • petrographic
  • diagenesis
  • saddle mountain
  • talkeetna formation
  • matanuska formation
  • kahiltna terrane
  • thin section
  • sedimentology
  • beluga formation
  • early jurassic
  • late jurassic
  • alaska range batholith
  • kaguyak
  • reservoir evaluation
  • straight creek
  • eocene
  • volcanic
  • kachemak bay
  • pomeroy arkose member
  • tertiary
  • chugach terrane
  • sand and gravel
  • falls creek
  • sedimentary rocks
  • cook inlet basin
  • aleutian arc
  • volcanic ash
  • iniskin bay
  • early cretaceous
  • pyroclastic flow
  • volcaniclastics
  • graywacke
  • reservoir
  • cook inlet
  • chisik member
  • sterling formation
  • resource assessment
  • tuxedni group
  • sample location map
  • seward peninsula
  • permeability
  • pyroclastic fall
  • petroleum basin study
  • zeolites
  • southcentral alaska
  • oil basins
  • chuitna river
  • chert
  • petrology
  • oligocene
  • sediment transport
  • tyonek formation
  • capps glacier
  • iniskin peninsula
  • oil and gas
  • late cretaceous
  • bluff point
  • pliocene
  • reservoir quality
  • clam gulch
  • beluga basin
  • fritz creek
  • sedimentary
  • porosity
  • homer
  • neogene
  • mineralogy
  • miocene
  • kaguyak formation
  • provenance
  • petrography
  • feldspar
  • oil and gas basin
  • sedimentation
  • west foreland formation
  • naknek formation
  • tyonek
  • quartz

Topics

  • Local Government

Categories