Borehole seismic pulse generation using rapid-opening valve
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United States of America Patent
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Nov 22, 2011
Grant Date -
Dec 11, 2008
app pub date -
Sep 18, 2006
filing date -
Sep 16, 2005
priority date (Note) -
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Abstract
During a surge-pulsing operation in a borehole (e.g an oil-well undergoing remediation) liquid is stored under pressure upstream of a valve, and then released through the valve suddenly enough to create a seismic wave, which propagates into the formation around the borehole, and assists the surge-pulsing to improve the conductivity and liquid-injectability of the formation. The downhole valve achieves the rapid-opening requirement by virtue of its geometrical layout, as dictated by the strictures of the downhole environment.
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