Wells – Processes – Cementing – plugging or consolidating
Patent
1981-08-10
1983-06-14
Novosad, Stephen J.
Wells
Processes
Cementing, plugging or consolidating
166283, 166284, 166303, 252 855R, E21B 33138, E21B 4322
Patent
active
043877699
ABSTRACT:
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.
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Cooke, Jr. Claude E.
Epstein Michael M.
Erbstoesser Steven R.
Sinclair Richard G.
Exxon Production Research Co.
Johnson K. C.
Novosad Stephen J.
Suchfield George A.
Thigpen E. Eugene
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