Wells – Processes – Specific propping feature
Reexamination Certificate
2006-06-27
2006-06-27
Suchfield, George (Department: 3676)
Wells
Processes
Specific propping feature
C166S283000, C166S300000, C166S308100, C166S308300, C507S265000, C507S269000, C507S277000, C507S924000
Reexamination Certificate
active
07066260
ABSTRACT:
Methods are presented to induce a screenout during a subterranean formation fracturing or combined fracturing and gravel packing treatment having a viscoelastic surfactant-based carrier fluid by laying down a filter cake at least a portion of which is a base-soluble material, injecting proppant slurry, and causing hydrolysis and dissolution of the solid base-soluble material by adding base so that leak-off increases, the concentration of proppant in the fracture increases, and the proppant screens out. A method of gravel packing with a viscoelastic surfactant-based carrier fluid by laying down a filter cake at least a portion of which is a base-soluble material, injecting gravel, and causing hydrolysis and dissolution of the solid base-soluble material by adding base. Methods of slowing or accelerating the hydrolysis and dissolution are given, and addition of bridging-promoting materials is included.
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Boney Curtis L.
Sullivan Philip F.
Cate David
Curington Tim
Mitchell Thomas O.
Schlumberger Technology Corporation
Suchfield George
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