SPE Formation Evaluation · 1989 · 19 citations · 23 references
EngineeringVertical StressEarth ScienceDrillingGeophysicsGeotechnical EngineeringAtmospheric ScienceEarth Stress MeasurementsIntermediate Principal StressGeophysical InterpretationMeteorologyHydraulic FracturingIntegrated Density LogsGeographyFractured Reservoir EngineeringKern CountyEnvironmental GeologyEngineering GeologyRock PropertiesTectonicsAtmospheric ConditionStructural GeologyCivil EngineeringGeomechanicsFormation EvaluationEarth SciencesPetroleum Engineering
Summary Earth stress magnitudes in the South Belridge oil field, determined from integrated density logs and microhydraulic fracturing tests, indicate that the vertical stress is generally the intermediate principal stress, except possibly at the deepest zone tested (2,100 ft [640 m]), where it is approximately equal to the lesser compressive horizontal stress. Azimuth of the greater horizontal stress and of induced hydraulic fractures, as measured or inferred by several different techniques, is N15°E±15°.
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Mechanics Of Hydraulic Fracturing
M. King Hubbert, David G. Willis · Transactions of the AIME · 1957 · 2.1K citations
Engineering, Mechanical Engineering, Petroleum Transactions +20
New Evidence on the State of Stress of the San Andreas Fault System
Mark D. Zoback, Mary Lou Zoback, Van S. Mount et al. · Science · 1987 · 1K citations