The present disclosure relates to compositions and methods for recovery of hydrocarbons from subterranean formations. The compositions may be dry blends of synthetic and naturally derived polymers. The blend compositions may also be produced as high activity solvent-based fluidized polymer suspensions. Either in dry or liquid forms, the blend compositions provide higher proppant carrying capacity in comparison to conventional solutions, as well as improved breakability and crosslinking capacity.

Polymeric compositions and systems useful for maintaining particle dispersions for extended periods of time via a three-dimensional interconnected network of bodies in the system after hydration.

The present invention relates to the use of a water soluble synthetic copolymer comprising acrylamide monomer units and additionally monomer units bearing phosphonic groups, said copolymer having not more than 5 wt.-% of monomer units containing carboxylic groups, as friction reducer for subterranean treatment and said water soluble synthetic copolymer being cross-linkable using polyvalent cations.

A coated particulate composition includes a vitreous polyphosphate glass particulate and a coating on at least a portion of the surface of the particulate, the coating comprising a water-insoluble polymer or a water-insoluble particulate, wherein the coating weight is about 0.01 wt % to 90 wt % of the mass of the coated particulate. The particulates provide long-term scale inhibition downhole in subterranean reservoirs where temperatures exceed 70 C.

A fracturing fluid including a mixture of an aqueous terpolymer composition including a terpolymer, an additive, and crosslinker. The terpolymer includes 2-acrylamido-2-methylpropanesulfonic acid, acrylamide, and acrylic acid monomer units, or a salt thereof. The additive includes a sugar alcohol or a derivative thereof, and the crosslinker includes a metal. The weight ratio of the metal to the terpolymer is in a range of 0.01 to 0.16, and a concentration of the additive is in a range of 0.001 wt. % to 10 wt. % of the fracturing fluid. Treating a subterranean formation includes introducing the fracturing fluid into a subterranean formation, and crosslinking the fracturing fluid in the subterranean formation to yield a crosslinked fracturing fluid. The crosslinked fracturing fluid mitigates damage caused by substantial amounts of total dissolved solids or significant water hardness.

A well treatment fluid composition that includes a tetrakis(hydroxyorgano)phosphonium salt and at least one oxidizing viscosity breaker. Methods for preparing a microbial viscosity breaker composition and treating a subterranean formation are also presented.

Provided herein are liquid polymer (LP) compositions comprising a synthetic (co)polymer (e.g., an acrylamide (co)polymer), as well as methods for preparing inverted polymer solutions by inverting these LP compositions in an aqueous fluid. The resulting inverted polymer solutions can have a concentration of a synthetic (co)polymer (e.g., an acrylamide (co)polymer) of from 50 to 15,000 ppm, and a filter ratio of 1.5 or less at 15 psi using a 1.2 m filter. Also provided are methods of using these inverted polymer solutions in oil and gas operations, including enhanced oil recovery.

Methods and systems for treating a subterranean formation. The method comprises adding proppant particulates to a fluidized bed granulator; spraying a binding agent on the proppant particulates to at least partially coat the proppant particulates with the binding agent, wherein the coated proppant particulates form proto-aggregates; adding the proto-aggregates to a treatment fluid; and introducing the treatment fluid into a fracture within the subterranean formation.

A fracturing fluid system for increasing hydrocarbon production in a subterranean reservoir formation comprising a fluid composition and a base fluid, the fluid composition comprising a nano-crosslinker, and a base polymer; and the base fluid operable to suspend the fluid composition, the base fluid comprising water; wherein the fluid composition and the base fluid are combined to produce the fracturing fluid system, wherein the fracturing fluid system is operable to stimulate the subterranean reservoir formation. In certain embodiments, the nano-crosslinker is an amine-containing nano-crosslinker and the base polymer is an acrylamide-based polymer. In certain embodiments, the fracturing fluid systems comprise proppants for enhancing hydraulic fracturing stimulation in a subterranean hydrocarbon reservoir.

A dry composition of dry polyacrylamide and dry guar; or a liquid suspension made from the dry composition for treating subterranean formations and methods for enhancing proppant transport in fracturing fluids using the composition.