Methods and compositions for dissolving a filter cake. An example method introduces a treatment fluid into an annulus of a wellbore penetrating a subterranean formation. The treatment fluid includes an aqueous fluid and a phosphate. The wellbore has a wall that is at least partially coated with a filter cake. The method further removes at least a portion of the filter cake from the wall.

Methods and compositions for dissolving a filter cake. An example method introduces a treatment fluid into an annulus of a wellbore penetrating a subterranean formation. The treatment fluid includes an aqueous fluid and a phosphate. The wellbore has a wall that is at least partially coated with a filter cake. The method further removes at least a portion of the filter cake from the wall.

A composition includes a nonionic fluorinated polymeric surfactant, a nonfluorinated surfactant, and a scale treatment. Additionally, a method for scale treatment is provided. The method includes injecting gas into the aforementioned composition to produce a foam and injecting the foam into a formation. In the formation, the foam may be exposed to a first temperature at which it has a first viscosity. The foam may be maintained inside the formation for a period of time, and then recovered from the formation, at which point it is exposed to a second temperature and has a second viscosity.

A composition includes a nonionic fluorinated polymeric surfactant, a nonfluorinated surfactant, and a scale treatment. Additionally, a method for scale treatment is provided. The method includes injecting gas into the aforementioned composition to produce a foam and injecting the foam into a formation. In the formation, the foam may be exposed to a first temperature at which it has a first viscosity. The foam may be maintained inside the formation for a period of time, and then recovered from the formation, at which point it is exposed to a second temperature and has a second viscosity.

Methods for diverting treatment fluids to less permeable zones of subterranean formations using a water swellable agent that can degrade at high temperatures are provided. In one embodiment, the method may comprise introducing a water swellable agent into or adjacent to a permeable zone of a subterranean formation; introducing an aqueous solution into the subterranean formation to contact the water swellable agent; allowing the water swellable agent to swell when contacted by the aqueous solution; introducing a treatment fluid into the subterranean formation, wherein the water swellable agent diverts the treatment fluid away from the permeable zone; and allowing the water swellable agent to thermally degrade.

A gravel pack containing a substrate particle coated with an inducibly degradable and a porous particle having an internal interconnected porosity that is at least partially infused with an inducer material for dissolving of a layer of filter cake disposed between the gravel pack and a subterranean formation.

A gravel pack containing a substrate particle coated with an inducibly degradable and a porous particle having an internal interconnected porosity that is at least partially infused with an inducer material for dissolving of a layer of filter cake disposed between the gravel pack and a subterranean formation.

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.

Treatment chemicals (for example, scale inhibition chemicals) can be applied to fluids in a pipeline by diverting a side stream of the produced water from a pipeline into a vessel containing a solid material to release of an active fluid treatment agent from the solid material into the diverted produced water; merging the diverted produced fluid containing the active fluid treatment agent into the pipeline; and adjusting a flow rate of the diverted side stream of the produced water to change a level of the active fluid treatment agent in the flow of produced water in the pipeline. Treatment systems can include a pipeline, a vessel containing a solid treatment material; a bypass line providing a fluid connection between the pipeline and an inlet of the vessel; and a return line providing a fluid connection between an outlet of the vessel and the pipeline.

Treatment chemicals (for example, scale inhibition chemicals) can be applied to fluids in a pipeline by diverting a side stream of the produced water from a pipeline into a vessel containing a solid material to release of an active fluid treatment agent from the solid material into the diverted produced water; merging the diverted produced fluid containing the active fluid treatment agent into the pipeline; and adjusting a flow rate of the diverted side stream of the produced water to change a level of the active fluid treatment agent in the flow of produced water in the pipeline. Treatment systems can include a pipeline, a vessel containing a solid treatment material; a bypass line providing a fluid connection between the pipeline and an inlet of the vessel; and a return line providing a fluid connection between an outlet of the vessel and the pipeline.