An unconsolidated subterranean zone (12) penetrated by a wellbore (10) is completed by placing a slotted liner (20) in the zone, isolating the slotted liner and the wellbore in the zone, injecting a hardenable resin composition coated particulate material (27) into the zone by way of the slotted liner and then hardening the resin composition whereby the particulate material is consolidated into a hard permeable uniform mass.

Fluid production from an unconsolidated formation penetrated by a wellbore is stimulated whilst restricting the migration of formation sands with fluids produced from the formation, by injecting a hardenable resin composition into a portion of the formation surrounding the wellbore whereby that portion is consolidated into a hard permeable mass, forming an indentation in the wellbore to facilitate the initiation of a fracture in the consolidated portion of the formation, creating a fracture in the formation extending from the wellbore through the consolidated portion of the formation into an unconsolidated portion thereof and depositing hardenable resin composition coated proppant in the fracture whereby the proppant is consolidated into a hard permeable mass.

A wellbore penetrating a subterranean formation is treated with a fluid whereby fine particulate flowback is reduced or prevented. The method includes the steps of providing a fluid suspension including a mixture of a particulate coated with a tackifying compound, pumping the suspension into a subterranean formation and depositing the mixture within the formation whereby the tackifying compound retards movement of at least a portion of any fine particulate within the formation upon flow of fluids from the subterranean formation through the wellbore. Alternatively, the tackifying compound may be introduced into a subterranean formation in a diluent containing solution to deposit upon previously introduced particulates to retard movement of such particulates and any fines subject to flow with production of fluids from the subterranean formation.

A subterranean formation is treated with a particulate laden fluid whereby particulate flowback is reduced or prevented. The method includes the steps of providing a fluid suspension including a mixture of a particulate upon which at least a partial coating of a tackifying compound is formed as a result of admixture of the tackifying compound therewith, pumping the suspension into a subterranean formation and depositing the mixture within the formation whereby the tackifying compound retards movement of at least a portion of the particulate within the formation upon flow of fluids from the subterranean formation. The tackifying compound is produced by reaction of a polyacid, polyorganophosphate, polyphosphonate, polysulfate, polycarboxylate or polysilicate, and a metal ion.

A subterranean formation is treated with a particulate laden fluid whereby particulate flowback is reduced or prevented. The method includes the steps of providing a fluid suspension including a mixture of a particulate and a tackifying compound, pumping the suspension into a subterranean formation and depositing the mixture within the formation. The tackifying compound coats at least a portion of the particulate and thus retards movement of at least a portion of the particulate within the formation upon flow of fluids from the subterranean formation.

A well in a poorly consolidated subterranean formation (10) bounded by one or more consolidated formations (12) is completed to prevent sand production from the poorly consolidated formation by drilling the well bore (14) into the consolidated boundary formation (12) adjacent to the poorly consolidated formation (10), creating a propped fracture (22) communicating with the well bore (14) in the consolidated boundary formation (12) which extends into the poorly consolidated formation (10), and producing fluids from the poorly consolidated formation (10) into the well bore (14) by way of the propped fracture (22).

Fracturing, frac-pack, and gravel packing procedures utilize a treating composition comprising a carrier fluid and a particulate blend, the blend consisting essentially of a large particulate material. The large particulate material consists of particles smaller than 4 mesh but not smaller than 40 mesh, and the small particulate material consists of particles smaller than 16 mesh but not smaller than 100 mesh. The small particulate material is present in the blend in an amount of from 5% to 60% by weight, based on the amount of the large particulate material present in the particulate blend.

A subterranean zone located in a well is treated by injecting a treating composition into the well to place the treating composition in the subterranean zone. the treating composition comprising a gelled carrier; a particulate material; an epoxy resin system including at least one epoxy resin; and a finely-divided hardening agent which, when dissolved, is operable for hardening the epoxy resin, the finely-divided hardening agent being dispersed in the epoxy resin system. The finely-divided hardening agent is maintained under conditions such that, prior to injecting the composition into the well, the finely-divided hardening agent does not substantially dissolve.

There is introduced into fractures radiating from a well bore proppant grains coated with a resin composition. The grains are suspended in a gell which includes a breaker for the gell. The resin composition is covered by a protective layer which is less reactive with respect to the breaker than is the resin composition.

La méthode concerne l'application à un puits dévié (1) d'un procédé connu de consolidation par polymérisation in situ d'une substance liquide (L) injectée jusque dans une zone (2) à consolider par un tube d'injection (5), par interaction avec un gaz G réagissant injecté à sa suite. Pour limiter la zone d'intervention et bien répartir la substance et le gaz sur toute cette zone, on utilise en combinaison un tube dont la paroi est pourvue d'ouvertures (11), sur toute sa partie terminale (5A), un packer de confinement (8) et un élément de séparation solide (10) déplacé dans le tube à la suite de la substance liquide, par le gaz réagissant, qui empêche toute interaction de celui-ci avant qu'il ne parvienne à la zone à consolider. L'injection du mélange liquide comporte des phases successives de circulation entre l'intérieur du tube (5) et l'annulaire entre lui et le puits (1) et de forçage pour le faire bien pénétrer dans la formation. Elle est généralement précédée d'une phase d'injection de produits solvants.

Application à la consolidation de puits horizontaux produisant des effluents pétroliers.

A method for controlling fines production in an unconsolidated or loosely consolidated formation penetrated by a cased hole. The cased hole is perforated in a manner sufficient to treat a formation internal with a consolidation resin. A thermally stable consolidation resin is injected into the internal and allowed to set. This resin is then drilled out of the hole. Afterwards the casing is reperforated and hydraulically fractured with a fluid containing a fine grain refractory proppant. A resultant fracture is propped by said proppant which removes fines from hydrocarbonaceous fluids produced after initiating a thermal enhanced oil recovery operation in the formation.

A method of completing a well includes injecting a consolidatable resin coated particulate slurry through production casing set in the production zone of a producing formation such that said slurry flows into an annulus formed between the casing and the wellbore to form a zone of high conductivity communicating with said casing and said formation and concurrently with such injection creating at least one fracture in said formation with said slurry; permitting said consolidatable resin to harden; and perforating the casing and consolidated zone. Prior to injection of the particulate slurry, a first fluid may be introduced through the casing into the annulus at such a rate that the first fluid removes undesired debris and mudcake from the wall of the wellbore.