Matrix acidizing high permeability contrast formations

Details Matrix acidizing high permeability contrast formations Matrix acidizing high permeability contrast formations

2008-01-15

2008-01-15

Suchfield, George (Department: 3676)

Wells

Processes

Specific low fluid loss feature for fluid attacking formation

C166S297000, C166S300000, C166S307000, C507S244000, C507S245000, C507S933000

Reexamination Certificate

active

11198422

ABSTRACT:
A method for stimulating thick or multilayered heterogeneous or homogeneous formations in a single trip without packers involves perforating with tubing conveyed perforation, then injecting a self-diverting acid, then moving the tubing string and perforating at a new location, and then injecting additional self-diverting acid. The sequence may be repeated. The acid is preferably a viscoelastic diverting acid. The self-diverting acid may be alternated with conventional treatment fluid. The job is designed to treat the least permeable zone(s) first and maximizes acid efficiency.

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Choosing a Perforation Strategy—Charlie Cosad, Oilfield Review, Oct. 1992.

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