Tyler sandstones (Pennsylvanian), Dickinson area, North Dakota: a 24-million barrel soil-zone stratigraphic trap
Approximately 24 million bbl of recoverable oil has been found in stratigraphic traps in the lower Pennsylvanian Tyler formation at the Dickinson, South Heart, and E. Green River Fields, Stark County, North Dakota. Production is from a multiple sequence of quartzose sandstones 5 to 18 ft (1.5 to 5 m) thick deposited as barrier islands along regressive shorelines. A typical vertical sequence is given. Throughout much of the subject area, porosity and permeability in the sandstones have been greatly reduced or completely destroyed by development of caliche paleosols. In the western part, the caliche consists of gray to brown limestone nodules or nodular layers of limestone in the sandstones and contains abundant pyrite. It is estimated that the caliche destroys as much as 50% of the potential reservoir rock in the area and is an essential factor in the stratigraphic entrapment of the petroleum accumulations by providing an eastern (updip) barrier to migration.
- OSTI ID:
- 6397755
- Report Number(s):
- CONF-7904212-
- Journal Information:
- Am. Assoc. Pet. Geol. Soc. Econ. Paleontol. Mineral., Annu. Meet. Abstr.; (United States), Conference: Annual AAPG-SEPM meeting, Houston, TX, USA, 1 Apr 1979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PETROLEUM DEPOSITS
STRATIGRAPHY
GEOLOGIC TRAPS
LIMESTONE
NORTH DAKOTA
OIL WELLS
PENNSYLVANIAN PERIOD
PERMEABILITY
PETROLEUM
POROSITY
PRODUCTION
PYRITE
RESERVOIR ROCK
SANDSTONES
CARBONATE ROCKS
CHALCOGENIDES
ENERGY SOURCES
FEDERAL REGION VIII
FOSSIL FUELS
FUELS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGY
IRON COMPOUNDS
IRON SULFIDES
MINERAL RESOURCES
MINERALS
NORTH AMERICA
PALEOZOIC ERA
RESOURCES
ROCKS
SEDIMENTARY ROCKS
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
USA
WELLS
020200* - Petroleum- Reserves
Geology
& Exploration