Compositions and Methods for Preparation and Utilization of Acid-Generating Materials
AssigneeShrieve Chemical Products, Inc.
InventorThomas Donovan WELTON
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Abstract
An oilwell treatment composition comprising (i) a solubilizing agent wherein the solubilizing agent comprises a saturated compound of the formula: H—(OCaH2a)x(OCbH2b)y—OCcH2c+1 where a and b are each independently 1, 3, or 4; c is 1, 2 or 3; x and y each independently, are numbers ranging from 1 to 5; (ii) a solid acid precursor and (iii) an aqueous fluid wherein the mass ratio of the solubilizing agent to the aqueous solution is within the range of about 1:3 to about 1:5 and the mass ratio of the solubilizing agent to the solid acid precursor is within the range of about 3:1 to about 2:1.
Claims20
An oilwell treatment composition comprising (i) a solubilizing agent wherein the solubilizing agent comprises a saturated compound of the formula:
- H—(OCaH2a)x(OCbH2b)y—OCcH2c+1
- where a and b are each independently 1, 3, or 4;
- c is 1, 2 or 3;
- x and y each independently, are numbers ranging from 1 to 5;
- (ii) a solid acid precursor and (iii) an aqueous fluid wherein the mass ratio of the solubilizing agent to the aqueous solution is within the range of about 1:3 to about 1:5 and the mass ratio of the solubilizing agent to the solid acid precursor is within the range of about 3:1 to about 2:1.
A method for forming a self-degrading filter cake in a subterranean formation, comprising:
- placing a well drill-in and servicing fluid in a subterranean formation, the well drill-in and servicing fluid comprising a base fluid, a viscosifier, a fluid loss control additive, a bridging agent, and an in-situ filter cake degradation composition comprising a solution formed by a solubilizing agent dissolving a solid acid precursor;
- and forming a filter cake upon a surface within the formation. lactide, S,S-lactide, meso-lactide, glycolide, or combinations thereof.
A treatment composition comprising a solution made by dissolving a solid acid-precursor.
Dependencies are inferred from the claim text.