Reservoir sedimentology in Mesaverde rocks at the Multi-Well Experiment site
Three types of sandstone reservoirs are encountered in Mesaverde rocks in the US Department of Energy's Multi-Well Experiment (MWX) in the east-central Piceance Creek Basin of northwestern Colorado. Characteristics of each type of tight-gas-sand reservoir are a function of the environment in which the sandstones were deposited. Sandstone reservoirs deposited in a fluvial environment are composed of stacked point-bar deposits, creating irregular, composite sand bodies. Underlying this, distributary channel reservoirs were deposited on a delta plain as elongate lenticular bodies. They are associated with mudstones on the upper delta plain (coastal) and mudstones and coals on the lower delta plain (paludal). Below these environments is a series of blanket sandstone reservoirs deposited as regressive, wave-dominated deltas and shorelines, with inter-bedded nonmarine coals and marine shales. Best estimates of reservoir morphology, dimensions, trends, and internal characteristics can be made on the basis of sedimentological models and characteristics observed in outcrops and in core. 8 figures.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6379275
- Report Number(s):
- SAND-83-1078; ON: DE83013959
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
030200* -- Natural Gas-- Reserves
Geology
& Exploration
58 GEOSCIENCES
580300 -- Mineralogy
Petrology
& Rock Mechanics-- (-1989)
COLORADO
FEDERAL REGION VIII
GAMMA LOGGING
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
LITHOLOGY
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NORTH AMERICA
PICEANCE CREEK BASIN
RADIOACTIVITY LOGGING
RESERVOIR ROCK
RESOURCES
ROCKS
SANDSTONES
SEDIMENTARY BASINS
SEDIMENTARY ROCKS
USA
WELL LOGGING