This invention relates to compositions and methods of treating a surface in contact with a wellbore and/or a subterranean formation penetrated by a well bore, comprising forming a treatment composition comprising a rheological polymer, a partitioning agent, and a liquid medium; and injecting the treatment fluid into the well bore, wherein the treatment composition forms a heterogeneous mixture comprising a dispersed rheological polymer-rich phase and a partitioning agent-rich phase, and wherein the stability of the heterogeneous mixture is controlled by introducing a stability control agent. This invention relates to compositions and methods for forming a water in water emulsion, comprising a rheological polymer, a partitioning agent, a liquid medium; and a stability control agent, wherein the emulsion is a heterogeneous mixture comprising a dispersed rheological polymer-rich phase and a partitioning agent-rich phase.

Preventing the flow of soil grains into oil and gas wells is highly desirable for the protection of hydrocarbon production. Geotechnical engineering solutions addressing this issue may utilize enzyme-induced precipitation methods to consolidate and increase shear strength. Methods may comprise: providing a mixture comprising urea, a urease enzyme, calcium chloride, magnesium chloride, and a cellulose; contacting at least a portion of the mixture with at least a portion of a subterranean formation; and forming a biomineral precipitate within the subterranean formation. The biomineral precipitate, comprised of a carbonate mineral and an evaporite mineral, may consolidate particles within the subterranean formation to form a consolidated body.

Described herein are methods for stabilizing a subterranean formation. The method may include introducing urea into a subterranean formation, wherein the subterranean formation includes sand, and wherein the subterranean formation includes a calcium salt, and introducing an amylase into the subterranean formation, wherein the amylase hydrolyzes the urea to form ammonium carbonate, and calcium in the calcium salt reacts with carbonate in the ammonium carbonate to form a calcium carbonate precipitate.