Methods of improving conformance control in fractured hydrocarbon reservoirs
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United States of America Patent
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Jan 13, 2009
Grant Date -
Feb 9, 2006
app pub date -
Aug 8, 2005
filing date -
Aug 6, 2004
priority date (Note) -
Expired
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Abstract
Three methods for improving the blocking ability of gels by improving the performance of gels in fractured reservoirs are provided. First method utilizes overload of a crosslinker, the second method utilizes a combination of crosslinker overload and aged crosslinker, and the third method utilizes a step of crosslinker pre-flush. These methods may be combined to further improve the performance of gels in fractured reservoirs. All methods utilized Chromium (III) acetate as a crosslinker. These methods outperformed the base formula of Chromium/polymer typically used in the field.
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