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AssigneeThe Curators of the University of Missouri
InventorsTao Song, Baojun Bai, Thomas P. Schuman
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The present invention generally relates to the field of conformance control in oil fields, particularly to a re-crosslinkable preformed particle gel system, and composition thereof. The composition of the re-crosslinkable preformed particle gel system contains monomers, crosslinkers, a polymer matrix, and additives. Components in the composition for re-crosslinkable preformed particle gel in the present invention have excellent compatibility with each other, and the obtained gel has excellent long term high-temperature resistance property. Different from prior products, in the re-crosslinkable preformed particle gel compositions according to embodiments of the present invention, the components that are used to re-crosslink the particle gels may be grafted on the polymer chain and will act as initiator or secondary crosslinker in different conditions. During particle injection process, all compositions would move together, thereby avoiding chromatographic problems typical of prior products.
A composition for controlling fluid flow, said composition comprising a plurality of swellable particles, said particles comprising a re-crosslinking agent embedded within a polymer matrix, and wherein upon swelling, said particles exhibit less than about 50 percent decrease in volume after being exposed to a temperature of at least about 100° C. for at least about 1 hour,
A synthetic crosslinking and/or re-crosslinking compound having the chemical formula:
Dependencies are inferred from the claim text.