Wells – Processes – Separate steps of fracturing or attacking formation
Patent
1989-04-05
1989-12-19
Suchfield, George A.
Wells
Processes
Separate steps of fracturing or attacking formation
166280, 166308, E21B 43267
Patent
active
048876704
ABSTRACT:
The present invention provides methods of controlling the growth of one or more vertically oriented fractures in a subterranean formation during a fracturing treatment. A first fluid having a known density and containing a diverting agent is introduced into a formation to create a fracture. A second fluid which may contain proppant and having a known density different from the first fluid then is introduced into the fracture whereby the second fluid selectively overrides or underrides the first fluid. Such fluid control forces the first fluid to the bottom or top of the fracture whereby the diverting agent therein is caused to screen out and impede further downward or upward growth of the fracture. The introduction of the second fluid then can be continued to extend the fracture as desired.
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Harris Lawrence E.
Lord David L.
Manrique J. E.
McDaniel Buddy W.
Dougherty Clark
Halliburton Company
Kent Robert A.
Suchfield George A.
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