The present invention relates to friction reducers and to well treatment fluids. In one embodiment there is provided a friction reducing composition comprising (a) a phosphonium compound and (b) a polymeric friction reducer. In a further embodiment there is provided a well treatment fluid comprising a phosphonium compound.

Various methods for redirecting a well treatment fluid to targeted zones of a subterranean formation within a reservoir and diverting the fluid away from high permeability or undamaged zones of the formation by temporarily blocking the high permeability zones are provided. A well treatment fluid can be diverted from a high permeability or undamaged zone of a formation within a reservoir having a high bottomhole temperature by introducing into the reservoir a biodegradable polymer that has excellent heat resistance.

Compositions and methods for treating a water and hydrocarbon producing subterranean formation to reduce the water permeability of the formation without reducing the hydrocarbon permeability of the formation are provided. In one embodiment, the method includes providing a treatment fluid including a base fluid and a relative permeability modifier including a polymer of at least one hydrophilic monomer and at least one hydrophobically modified hydrophilic monomer, wherein the polymer includes a sulfonate moiety, and introducing the treatment fluid into at least a portion of a subterranean formation.

A well treatment composition may include a capsule and a treatment agent solution within the capsule. The treatment agent solution may have a treatment agent. The system may include a radiation source: neutron, gamma, X-ray, and/or ultraviolet. A method may include introducing the well treatment composition downhole in wellbore circulation fluid, and introducing a radiation source into the wellbore and positioning the radiation source. The method may include activating the radiation source and emitting radiation that intermingles with the well treatment composition at a target location. The method may include maintaining the wellbore to allow emitted radiation from the activated radiation source to react with the well treatment composition, forming a radiation activated well treatment composition. The method may include allowing the radiation activated well treatment composition to disintegrate or dissolve, breaking encapsulation and releasing treatment agent at the target location.

The flow of well treatment fluids may be diverted from a high permeability zone to a low permeability zone within a fracture network within a subterranean formation by use of a divert system comprising dissolvable diverter particulates and proppant. At least a portion of the high permeability zone is propped open with the proppant of the divert system and at least a portion of the high permeability zone is blocked with the diverter particulates. A fluid is then pumped into the subterranean formation and into a lower permeability zone of the formation farther from the wellbore. The diverter particulates in the high permeability zones may then be dissolved at in-situ reservoir conditions and hydrocarbons produced from the high permeability propped zones of the fracture network. The divert system has particular applicability in the enhancement of production or hydrocarbons from high permeability zones in a fracture network located far field from the wellbore.

The present disclosure relates to production of fluids from subterranean formations and can be applied for stimulation of the flow through the formation by means of hydraulic fracturing. More particularly, it relates to creation of proppants with soluble coating, and preparing fluid material for fracturing operations and for enhancing the efficiency of heterogeneous proppant placement in a hydraulic fracture.

Proppant transport assist in low viscosity treatment fluids. Treatment fluids and methods use fiber to inhibit proppant settling without an unacceptable bridging tendency.

Proppant transport assist in low viscosity treatment fluids. Treatment fluids and methods use fiber containing 0.1 to 20 wt % silicones to inhibit proppant settling without an unacceptable bridging tendency.

Embodiments for a high temperature fracturing fluid comprise an aqueous fluid, carboxyl-containing synthetic polymer, metal oxide nanoparticles having a particle size of 0.1 to 500 nanometers, and a metal crosslinker which crosslinks the carboxyl-containing synthetic polymers to form a crosslinked gel, wherein the metal oxide nanoparticles are dispersed within the crosslinked gel.

Methods and systems including introducing a treatment fluid into a subterranean formation wellbore. The treatment fluid includes an aqueous base fluid; nitrogen-containing waste plastic; and carbon dioxide. The nitrogen-containing waste plastic is hydrolyzed in the aqueous base fluid under conditions in the subterranean formation wellbore, thereby forming hydrolysis reaction products. The hydrolysis reaction products and the carbon dioxide are reacted in the subterranean formation wellbore.