In-situ dynamic elastic moduli of Mesaverde rocks and a comparison with static and dynamic laboratory moduli. [In-situ and laboratory measurements in shale and sandstone]
This report focuses on tests performed on sandstones and shales from four wells in the Mesaverde formation. A previous document showed a comparison of the static and dynamic laboratory moduli. This document describes how field velocity logs were used to derive field dynamic moduli. A 3-way comparison was performed for these stiffness properties; the results show no agreement between the three sets of values. Differences between dynamic stiffness coefficients from the field and the laboratory exceed 200%; differences between static and dynamic coefficients range up to 600%. In turn, this indicated that a reliable method of estimating mechanical rock properties for hydraulic fracturing design has not been established, and that such a task should be pursued. 23 refs., 14 figs., 3 tabs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6165684
- Report Number(s):
- UCID-20611; ON: DE86006934
- Country of Publication:
- United States
- Language:
- English
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BULK DENSITY
COLORADO
DATA
DENSITY
DRILL CORES
ELASTICITY
EXPERIMENTAL DATA
FEDERAL REGION VIII
INFORMATION
MECHANICAL PROPERTIES
NORTH AMERICA
NUMERICAL DATA
PHYSICAL PROPERTIES
POISSON RATIO
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
SEISMIC P WAVES
SEISMIC S WAVES
SEISMIC WAVES
SHALES
SHEAR PROPERTIES
SONIC LOGGING
SOUND WAVES
TENSILE PROPERTIES
USA
VELOCITY
WAVE PROPAGATION
WELL LOGGING
WYOMING