C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/512 (2006.01) C09K 8/588 (2006.01) E21B 33/13 (2006.01)
Patent
CA 2408312
This invention is directed to a composition comprising expandable cross linked polymeric microparticles having an unexpanded volume average particle size diameter of from about 0.05 to about 10 microns and a cross linking agent content of from about 9,000 to about 200,000 ppm of labile cross linkers and from 0 to about 300 ppm of non-labile cross linkers and to the use of the composition for modifying the permeability of subterranean formations and increasing the mobilization and/or recovery rate of hydrocarbon fluids present in the formations.
L'invention concerne une composition caractérisée en ce qu'elle comprend des microparticules polymères réticulées expansibles ayant une granulométrie moyenne volumique non expansée d'environ 0,05 à environ 10 microns, et un agent de réticulation à une teneur d'environ 9.000 à environ 200.000 ppm de réticulants labiles et de 0 à environ 300 ppm de réticulants non labiles. L'invention concerne également l'utilisation de la composition précitée en vue de modifier la perméabilité des formations souterraines et d'accroître le taux de mobilisation et/ou de récupération des fluides hydrocarbonés présents dans les formations.
Chang Kin-Tai
Frampton Harry
Morgan James C.
Bcf Llp
Ondeo Nalco Energy Services L.p.
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