E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
31/21
E21B 33/138 (2006.01) C08G 63/08 (2006.01) C09K 8/508 (2006.01) C09K 8/516 (2006.01)
Patent
CA 1197978
ABSTRACT OF THE DISCLOSURE The present invention relates generally to the composition and method for reducing the permeability of subterranean formations penetrated by a wellbore. The composition of the present invention comprises a wellbore fluid having dispersed therein a fluid loss control agent comprising a polyester polymer which is substantially insoluble in the wellbore fluid. The polymer degrades in the presence of water at an elevated temperature to form small molecules which are soluble in a fluid in the subterranean formation. The method of the present invention comprises reducing the permeability of subterranean formations penetrated by a wellbore by placing the composition of the present invention down the wellbore.
407776
Cooke Claude E. Jr.
Epstein Michael M.
Erbstoesser Steven R.
Sinclair Richard G.
Borden Ladner Gervais Llp
Exxon Production Research Company
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