Blowing agent incorporated resin systems for consolidating subterranean oil and gas bearing formations
One or more embodiments relates to a productive consolidated sand pack product. The sand pack product may be a cured resin that is bound to sand particles and has a porous structure. The sand pack product is obtained from curing a resin composition which may include a resin, a curing agent, a chemical blowing agent, a surfactant, a carrier fluid, a pH agent, and a salt. The porous volume may include one or more of trapped gas, bubbles, and open or connected pore space.
1. A productive consolidated sand pack product, comprising:
a productive consolidated sand pack that contains a cured resin bound to sand particles having a porous structure that is obtained from curing of a resin treatment composition comprising a resin, a curing agent, a chemical blowing agent comprising a chemical ingredient or multiple chemical ingredients incorporated into the resin treatment composition that will generate a gas by an activation means, a carrier fluid, a surfactant, and optionally one or more of a pH adjusting agent, a second surfactant, and a salt,
wherein the resin is a curable epoxy resin and the curable epoxy resin has an epoxy equivalent weight of about 100 g to about 400 g, and
wherein the resin treatment composition comprises the curable epoxy resin in an amount in a range of 1 to 75 wt % and the curing agent in an amount in a range of 0.5 to 33 wt %,
where the productive consolidated sand pack includes one or more of trapped gas, bubbles, and open and connected pore space,
wherein the carrier fluid comprises a mixture of an aqueous based solution and an organic solvent selected from the group consisting of glycol ethers, ethylene glycol, dimethyl sulfoxide, dimethyl formamide, acetone, and methyl ethyl ketone, and
wherein including the organic solvent in the mixture disperses the chemical blowing agent within the resin.
2. The productive consolidated sand pack of claim 1 , wherein the porous structure has a permeability of from about 65% to about 95%.
3. The productive consolidated sand pack of claim 1 , wherein the curing agent is selected from the group consisting of an amine, an imidazole, an amide, an anhydride, and combinations thereof.
4. The productive consolidated sand pack of claim 1 , wherein the chemical blowing agent releases one or more gases selected from the group consisting of air, nitrogen, and carbon dioxide which are trapped in the cured resin and allow a foamed structure to form.
5. The productive consolidated sand pack of claim 1 , wherein the chemical blowing agent is selected from the group consisting of a carbonate, a mixture of sodium nitrate and ammonium chloride, a hydrazide compound, an azo compound, and combinations thereof.
6. The productive consolidated sand pack of claim 1 , wherein the resin treatment composition comprises the chemical blowing agent in an amount in a range of 0.1 to 20 wt %.
7. The productive consolidated sand pack of claim 1 , wherein the resin treatment composition includes the second surfactant, wherein the surfactant and the second surfactant are selected from the group consisting of an anionic surfactant, a cationic surfactant, a non-ionic surfactant, and an amphoteric surfactant.
8. The productive consolidated sand pack of claim 1 , wherein the resin treatment composition comprises the surfactant in an amount in a range of 0.1 to 5 wt %.
9. The productive consolidated sand pack of claim 1 , wherein the resin treatment composition comprises the carrier fluid in an amount in a range of 10 to 90 wt %.
10. The productive consolidated sand pack of claim 1 , wherein the resin treatment composition includes the pH adjusting agent and wherein the pH adjusting agent is selected from the group consisting of sodium hydroxide, potassium hydroxide, sodium carbonate, organic acids, inorganic acids, and combinations thereof.
11. The productive consolidated sand pack of claim 1 , wherein the resin treatment composition includes the salt and wherein the salt is selected from the group consisting of a monovalent, divalent, or trivalent inorganic salt, and combinations thereof.
12. The productive consolidated sand pack of claim 1 , wherein the productive consolidated sand pack has an unconfined compressive strength in a range from about 100 psi to about 3000 psi.