Pulsed fracturing method and apparatus
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United States of America Patent
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Aug 8, 2017
Grant Date -
Apr 30, 2015
app pub date -
Oct 31, 2014
filing date -
Oct 31, 2013
priority date (Note) -
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Abstract
The branching of fractures in shale formations surrounding a wellbore can be enhanced so that more rock surface is exposed in the formation and more hydrocarbon resources can be recovered using smaller quantities of fracturing fluids. The branching of the fractures can be enhanced by establishing a substantially static sub-threshold fluid pressure in a well in a geological formation, and generating a pressure pulse in the well such that the pressure pulse combined with the substantially static sub-threshold fluid pressure forms a plurality of fractures in the geological formation. An arc jet insertable into a passage in the geological formation and having an electric arc channel can be used to generate the pressure pulse.
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