Method for isolating hydrocarbon-containing formations intersect

Details Method for isolating hydrocarbon-containing formations intersect Method for isolating hydrocarbon-containing formations intersect

1997-06-03

1999-08-10

Suchfield, George

Wells

Processes

Separate steps of fracturing or attacking formation

166284, 166297, 166308, E21B 3313, E21B 4326

Patent

active

059343770

ABSTRACT:
A method for isolating subterranean formations or zones intersected by a single wellbore is provided. The method comprises perforating a zone intersected by the wellbore and pumping a sealing means into the wellbore to seal against the side of the casing above and below the perforations to prevent communication from the zone into the wellbore after the casing has been perforated. The method further comprises fracturing the zone through the perforations prior to sealing and thus isolating the zone. Other zones thereabove are likewise perforated, fractured, sealed and thus isolated by pumping sealing means into the wellbore to seal the casing adjacent the perforations to prevent communication from the affected zones into the wellbore.

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