Wells – Processes – Separate steps of fracturing or attacking formation
Reexamination Certificate
2007-02-27
2007-02-27
Suchfield, George (Department: 3676)
Wells
Processes
Separate steps of fracturing or attacking formation
C166S295000, C166S307000, C507S221000, C507S224000, C507S225000, C507S230000
Reexamination Certificate
active
10612271
ABSTRACT:
The present invention provides a method of stimulating a subterranean formation penetrated by a well. The formation has a water-bearing section and a hydrocarbon-bearing section. The method includes the steps of: (a) introducing into the formation an aqueous treatment fluid containing a hydrophobically-modified relative permeability modifier, and (b) introducing an acidizing treatment fluid into the formation. The hydrophobically-modified RPM can be formed and introduced into the formation in several ways. For example, the hydrophobically-modified RPM can be the reaction product of a hydrophilic polymer and a hydrophobic compound that are capable of reacting with each other. The hydrophilic polymer is a polymer containing reactive amino groups in the polymer backbone or as pendant groups, which are capable of reacting with a hydrophobic alkyl halide compound. The hydrophobically-modified RPM can include, for example, a polymer of DMAEMA quaternized with an alkyl halide, wherein the alkyl halide has an alkyl chain length of 6 to 22 carbons.
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ews/archive/200
Dalrymple Eldon D.
Eoff Larry
Reddy B. Raghava
Venditto Jim
Crutsinger & Booth
Halliburton Energy Service,s Inc.
Kent Robert A.
Suchfield George
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