A reservoir analysis of the Denver earthquakes : a case of induced seismicity

Hdl Handle:
http://hdl.handle.net/10150/191695
Title:
A reservoir analysis of the Denver earthquakes : a case of induced seismicity
Author:
Hsieh, Paul Anthony.
Issue Date:
1979
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Injection of fluid waste into Precambrian crystalline rocks at the Rocky Mountain Arsenal triggered earthquakes in the 1960s. Available data suggest that the waste fluid was injected into a reservoir composed of connected vertical fractures. Earthquakes are believed to be results of lateral sliding motions along fracture planes. A mathematical model is constructed to simulate fluid pressure build-up caused by injection. Computed pressure build-up is related to the spatial distribution of earthquake epicenters. The results show that the earthquakes are confined to that part of the reservoir where the pressure build-up exceeds 32 bars. This critical value is interpreted as the pressure build-up above which earthquakes occur. The existence of this critical pressure is consistent with the Hubbert-Rubey theory on the role of fluid pressure in fault movement. The migration of earthquake epicenters away from the injection well, a phenomenon noted by previous investigators, can be accounted for by the outward propagation of the critical pressure build-up. The analysis is extended to examining the effects of fracture widening under high injection pressure. The results show that the effect is confined to a small region within one kilometer of the injection well.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Hydrology -- Colorado -- Denver Region -- Mathematical models.; Seismology -- Colorado -- Denver Region.; Waste disposal in the ground -- Colorado -- Denver Region.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Hydrology and Water Resources; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Maddock III, Thomas; Bredehoeft, John D.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleA reservoir analysis of the Denver earthquakes : a case of induced seismicityen_US
dc.creatorHsieh, Paul Anthony.en_US
dc.contributor.authorHsieh, Paul Anthony.en_US
dc.date.issued1979en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractInjection of fluid waste into Precambrian crystalline rocks at the Rocky Mountain Arsenal triggered earthquakes in the 1960s. Available data suggest that the waste fluid was injected into a reservoir composed of connected vertical fractures. Earthquakes are believed to be results of lateral sliding motions along fracture planes. A mathematical model is constructed to simulate fluid pressure build-up caused by injection. Computed pressure build-up is related to the spatial distribution of earthquake epicenters. The results show that the earthquakes are confined to that part of the reservoir where the pressure build-up exceeds 32 bars. This critical value is interpreted as the pressure build-up above which earthquakes occur. The existence of this critical pressure is consistent with the Hubbert-Rubey theory on the role of fluid pressure in fault movement. The migration of earthquake epicenters away from the injection well, a phenomenon noted by previous investigators, can be accounted for by the outward propagation of the critical pressure build-up. The analysis is extended to examining the effects of fracture widening under high injection pressure. The results show that the effect is confined to a small region within one kilometer of the injection well.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshHydrology -- Colorado -- Denver Region -- Mathematical models.en_US
dc.subject.lcshSeismology -- Colorado -- Denver Region.en_US
dc.subject.lcshWaste disposal in the ground -- Colorado -- Denver Region.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineHydrology and Water Resourcesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairMaddock III, Thomasen_US
dc.contributor.chairBredehoeft, John D.en_US
dc.contributor.committeememberNeuman, Shlomo P.en_US
dc.identifier.oclc213273916en_US
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