Foam/steam injection into a horizontal wellbore for multiple fra

Details Foam/steam injection into a horizontal wellbore for multiple fra Foam/steam injection into a horizontal wellbore for multiple fra

1991-10-30

1993-05-04

Suchfield, George A.

Wells

Processes

Separate steps of fracturing or attacking formation

166 50, 166303, 166308, 166309, E21B 4324, E21B 43267

Patent

active

052072711

ABSTRACT:
A foam/steam injection method for forming fractures is a for reservoir penetrated by a horizontal wellbore. Steam is injected into said wellbore at a pressure sufficient to fracture the formation. Water which is used to make the steam contains a foamable composition in an amount sufficient to make a foam upon contact with steam. Steam and foam enter the wellbore and create a fracture in an oil-rich zone. Thereafter, foam blocks further steam entry into the created fracture which causes another fracture to form at a second interval along the horizontal wellbore. These steps are repeated until a fracture system is made along the length of the wellbore.

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