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Exploration Geophysics.docx

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Department
Earth Sciences
Course
ERTH 2404
Professor
All Professors
Semester
Winter

Description
ExplorationGeophysicsGeophysicsMethodsSeismicmethodsReflectionseismicRefractionseismicGravityElectromagneticEMmethodsMagneticmethodsRadiometricmethodsExplorationseismologyMainlybasedonthereflectionandrefractionofprimaryPwavesonboundariesbetweendifferentmediainthesubsurfacePwaveseasytogeneratetravelfastPropagateinliquidsandsolidsControlledapproachspecializedequipmentisusedtogenerateseismicwavesatpresettimesByfarthemostwidelyusedmethodforoilandgasexploration2SeismicimpedanceZkgmsingeneralthehardertherockthehightheZCriticalangleincidenceangleforwhichrefractedwavesaregeneratedCriticaldistanceminimumdistanceatwhichrefractionscanberecordedCrossoverdistancedistancefromwhichrefractedwavesarethefirstarrivalsSeismicsourcesObjectivesamplethesubsurfaceatawiderangeoffrequenciesTwoapproaches
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