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- W2003289664 abstract "Abstract New technology for gel treatments has been developed. The gel is formed when a solution of a water-soluble polymer (hydroxypropylcellulose, HPC) and a surfactant (sodium dodecyl sulfate, SDS) mixes with brine. While conventional gels use a chemical initiator or activator, such as a heavy metal like chromium, to form the gel, the new HPC/SDS gel uses the salinity of the connate brine to initiate the gel formation. The viscosity of a fresh water HPC/SDS solution is about 80 centipoise (80.0 mPa s). When the HPC/SDS solution is mixed with brine, a gel is immediately formed. This stable, high viscosity gel has a viscosity of about 70,000 centipoise (70,000 mPa s). It is readily formed in a core when an injected slug of HPC/SDS mixes with the connate brine. In coreflood tests the gel effectively reduces brine permeability in Berea sandstone by 95%. In parallel coreflood tests, the gel is able to divert 90% of the fractional flow of brine. The HPC/SDS gel system has advantages over conventional cross-linked polymer gels. An added chemical initiator or activator is not needed to cause the gelation reaction. Additionally, the HPC/SDS gel does not require any design or tailoring of the treatment for a specific reservoir. These requirements can affect the success of a gel treatment. By sidestepping them, the HPC/SDS gel offers the potential for more effective gel treatments. The HPC/SDS gel only requires the salinity of the connate brine to cause the gelation process. This makes it easier to place this gel deeper in a reservoir than a cross-linked polyacrylamide gel." @default.
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- W2003289664 date "1992-04-01" @default.
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- W2003289664 title "Conformance control gels—Formation by contact with brine" @default.
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- W2003289664 doi "https://doi.org/10.1016/0920-4105(92)90007-n" @default.
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