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The effects of stress paths on acoustic velocities and 4D seismic imaging
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2007
Year
EngineeringSeismic WaveAcoustic VelocitiesEarthquake HazardsEarth ScienceTotal StressStress PathsSeismic AnalysisStress WaveGround MotionEarthquake EngineeringRock VelocityTime ShiftsInduced SeismicitySeismic ImagingUltrasoundRock PropertiesSeismologySeismic Reflection ProfilingCivil EngineeringRock MechanicsSeismic Hazard
Time shifts on 4D seismic images result from two basic causes: (1) acoustic velocity changes due to fluid migration, fluid substitution, fluid composition; and (2) velocity changes resulting from changes in total stresses (i.e., the vertical and horizontal stresses) during depletion. This paper is concerned only with the latter—the effect of changing total stress on rock velocity.