Degradable diversion material having a polyacrylate compound
Disclosed herein are degradable diverter materials comprising a polyacrylate compound. In particular, the degradable diverter material may be a particulate with each individual particle being having a polyacrylate compound and optionally at least one inert filler. The degradable diverter material may be introduced into a wellbore penetrating a subterranean formation. The degradable diverter material may then be allowed to divert at least a portion of fluid present downhole, the fluid being introduced from the surface or already present downhole. The degradable diverter material can then be allowed to at least partially degrade via dissolution.
1. A method comprising:
a) introducing a degradable diverter material in a carrier fluid into a wellbore penetrating a subterranean formation, the degradable diverter material comprising a polyacrylate compound;
b) allowing the degradable diverter material to divert at least a portion of a fluid present downhole; and
c) allowing the degradable diverter material to at least partially degrade;
wherein the carrier fluid is salt saturated and comprises divalent brine;
wherein the polyacrylate compound is insoluble in the carrier fluid.
2. The method of claim 1 , wherein the polyacrylate compound comprises the compound of Formula I
wherein R 1 , R 2 , and R 3 are independently selected from a group consisting of hydrogen, unsubstituted C 1 -C 6 alkyl, substituted C 1 -C 6 alkyl, unsubstituted aryl, or substituted aryl; and
wherein the polyacrylate compound is non cross-linked.
3. The method of claim 1 , wherein the degradable diverting material comprises a copolymer, or a terpolymer with at least one monomer of Formula II:
wherein R 2 , R 3 , R 4 , and R 5 are independently selected from a group consisting of hydrogen, unsubstituted C 1 -C 6 alkyl, substituted C 1 -C 6 alkyl, unsubstituted aryl, or substituted aryl.
4. The method of claim 1 , wherein the degradable diverter material is introduced into the wellbore as a solid, a semi-solid, a gel, a heterogeneous mixture, or a homogeneous solution, wherein the heterogeneous mixture or the homogeneous solution comprises the carrier fluid.
5. The method of claim 1 , wherein the amount of the degradable diverter material ranges from about 0.01 lbs/gallon to about 10 lbs/gallon.
6. The method of claim 1 , wherein less than about 10% of the polyacrylate compound dissolves in 6 days in the carrier fluid.
7. The method of claim 1 , wherein the degradable diverter material comprises an inert filler, and wherein the inert filler is selected from a group consisting of calcium carbonate, sand, clay, graphite, man-made ceramics, polylactic acid (PLA), polyglycolic acid (PGA), polyterephthalates, or combinations thereof.
8. The method of claim 1 , wherein the degradable diverter material is in particulate form and has a multimodal particle size distribution.
9. The method of claim 1 , wherein degradation comprises dissolution of the polyacrylate compound in a downhole aqueous fluid.
10. The method of claim 1 , further comprising mixing the polyacrylate compound with the carrier fluid using mixing equipment before or during introduction into the wellbore, and wherein the degradable diverter material is introduced into the subterranean formation using one or more pumps.