Acoustic measurements in rock formations for determining fracture orientation
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United States of America Patent
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May 17, 1988
Grant Date -
N/A
app pub date -
Aug 12, 1986
filing date -
Aug 12, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and system for determining the probable direction of extension of a hydraulically induced fracture in a hydrocarbon bearing formation wherein prior to inducing the fracture, the formation region to be fractured is heated and thermally induced acoustic emissions from the formation are sensed to determine the orientation of the maximum and minimum horizontally directed in situ compressive stresses based on the acoustic emission rate and/or intensity. A device including a microwave energy generator and an array of acoustic transducers is lowered into a wellbore to generate and measure the thermally induced acoustic emissions.
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