Creep and creep modeling of three domal salts: a comprehensive update. [West Hackberry and Bayou Choctaw domes in Louisiana; Bryan Mound dome in Texas]
Stress and temperature change tests are described to determine upper and lower bound of the rates of steady state creep for three domal salts. Results obtained are compared with published data for salt from the same sites and with two larger data sets for a bedded salt. The various data sets are then correlated in activation analyses and fitted by models for power-law creep, cross-slip, and dislocation glide to show that a cross-slip model yields the best and mechanistically most credible fit. This suggestion is consistent with limited substructure observations for one sample. No satisfactory fit was obtained for a two-mechanism model dislocation climb and cross-slip. Results described include stress drop measurements that demonstrate slow recovery. It remains to be proved if recovery of rock salt at low temperature will be complete, and if so, after how much strain. Although all creep data are described most satisfactorily in terms of cross-slip, power-law models continue to be good empirical approximations. Therefore, the further use of power-law creep equations to describe the steady state creep of rock salt in SPR design calculations is deemed justified. 58 references, 15 figures, 3 tables.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6729137
- Report Number(s):
- SAND-84-0568; ON: DE84015755
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
58 GEOSCIENCES
LOUISIANA
SALT DEPOSITS
CREEP
STRATEGIC PETROLEUM RESERVE
SALT CAVERNS
TEXAS
COMPARATIVE EVALUATIONS
CORRELATIONS
EXPERIMENTAL DATA
MATHEMATICAL MODELS
STRESSES
UNDERGROUND STORAGE
CAVITIES
DATA
FEDERAL REGION VI
GEOLOGIC DEPOSITS
INFORMATION
MECHANICAL PROPERTIES
NORTH AMERICA
NUMERICAL DATA
RESERVES
RESOURCES
STORAGE
USA
024000* - Petroleum- Storage- (-1989)
580300 - Mineralogy
Petrology
& Rock Mechanics- (-1989)