A method for improving the stability of reservoir rock in bottomhole zones of wells to destructive loads developing during operation of wells at oil and gas fields during operation at underground gas storages is disclosed. Prior to running of casing string in zone of contact of productive formation with its impenetrable roof it is proposed to drill or blur cone-shaped cavern with vertex facing the formation, the cavity parameters must satisfy the conditions according to the depth of the cavity counted from the well wall along the contact line of the productive formation and its impermeable roof should exceed 4 cm, and the angle between the cone generatrix and the casing pipe generatrix within the range of values from 5° up to 30°. This will increase well bottomhole zone stability to destructive loads developing in process of its operation and reduction of volumes of broken rock carried to well bore.

A tool comprising a movable sleeve with an inner diameter, an outer diameter, and a screen. The screen being configured to filter materials flowing into a first port within the moveable sleeve, wherein the outer diameter of the movable sleeve is positioned adjacent to an inner diameter of the tool, wherein the screen is configured to move with the moveable sleeve. The tool further comprising a temporary member positioned on the inner diameter of the moveable sleeve, the temporary member being configured to temporarily cover an inner sidewall of the screen.

A system and method for fracking a hydrocarbon formation. An actuating member, flowable along a production string, is provided. A unique key portion thereon engages a desired sliding sleeve covering an associated port in the production string. Applying uphole fluid pressure causes the sliding sleeve and actuating member to move so as to uncover the associated port. After fracking and cessation of supply of pressurized fracturing fluid, a compressed spring on the actuating member decompresses so as to reposition a sand screen immediately beneath the port so as to prevent sand from flowing into the production string. Flowable insertion of additional “keyed” actuating members allows similar opening of additional successive uphole ports and fracking in the regions of such additional opened ports, with similar location of sand screens at each opened port. Plug members on each actuating member thereafter dissolve or are successively burst to thereby allow production.

A method of sand consolidation is provided. The method includes injecting a consolidating fluid into a subterranean sand formation via a wellbore to saturate a portion of the subterranean sand formation in a target region surrounding the wellbore and displace a formation fluid present in the subterranean sand formation. Herein, the consolidating fluid comprises bitumen dissolved in an aromatic solvent. The method further includes injecting a composition comprising one or more heat-generating chemicals into the subterranean sand formation such that the portion of the subterranean sand formation in the target region is heated to a target temperature of at least 150° C. The method further includes injecting a gas comprising oxygen into the subterranean sand formation for a period sufficient to oxidize the bitumen in the target region into a residue present on sand grains to bind the sand grains together into a consolidated permeable matrix. A volume fraction of the residue in the consolidated permeable matrix in the target region is about 5-30%.

A sand disposal system is used with a sand management arrangement that handles flow-back of sand and other solid materials in a slurry of flow from well(s) at wellsite(s). The sand disposal system includes a tank filling module that mounts on a disposal tank at a wellsite. The module controls and weighs the disposal of the solid material or sand into the tank by actuating a flap and sensing weight with a weight sensor. The module also monitors the level in the tank to determine when emptying of the tank is needed. A control system can control operations of the module in conjunction with the other processes of the sand management arrangement.

A sand disposal system is used with a sand management arrangement that handles flow-back of sand and other solid materials in a slurry of flow from well(s) at wellsite(s). The sand disposal system includes a tank filling module that mounts on a disposal tank at a wellsite. The module controls and weighs the disposal of the solid material or sand into the tank by actuating a flap and sensing weight with a weight sensor. The module also monitors the level in the tank to determine when emptying of the tank is needed. A control system can control operations of the module in conjunction with the other processes of the sand management arrangement.

A system and method for fracking a hydrocarbon formation. An actuating member, flowable along a production string, is provided. A unique key portion thereon engages a desired sliding sleeve covering an associated port in the production string. Applying uphole fluid pressure causes the sliding sleeve and actuating member to move so as to uncover the associated port. After fracking and cessation of supply of pressurized fracturing fluid, a compressed spring on the actuating member decompresses so as to reposition a sand screen immediately beneath the port so as to prevent sand from flowing into the production string. Flowable insertion of additional “keyed” actuating members allows similar opening of additional successive uphole ports and fracking in the regions of such additional opened ports, with similar location of sand screens at each opened port. Plug members on each actuating member thereafter dissolve or are successively burst to thereby allow production.

A method for fracking a hydrocarbon formation. An actuating member, flowable along a production string, is provided. A unique key portion thereon engages a desired sliding sleeve covering an associated port in the production string. Applying uphole fluid pressure causes the sliding sleeve and actuating member to move so as to uncover the associated port. After fracking and cessation of supply of pressurized fracturing fluid, a compressed spring on the actuating member decompresses so as to reposition a sand screen immediately beneath the port so as to prevent sand from flowing into the production string. Flowable insertion of additional “keyed” actuating members allows similar opening of additional successive uphole ports and fracking in the regions of such additional opened ports, with similar location of sand screens at each opened port. Plug members on each actuating member thereafter dissolve or are successively burst to thereby allow production.

Methods for treating a formation may include introducing components of a treatment solution into a wellbore such that the treatment solution contacts the formation to be treated, where the treatment solution may include urea, urease, a calcium ion source, one or more polysaccharides, a casein protein, a protease, an ionic compound, and a sugar, where the formation may have an amount of sand production before treatment and may be in fluid contact with the wellbore, and where an amount of sand production after treatment may be less than the amount of sand production before treatment. Consolidated sand structure compositions may include previously unconsolidated sand interlinked by inter-particle cementitious bonds comprising deposited calcium carbonate crystals, where the consolidated sand has a structural strength and the consolidated sand structure is porous to permit fluid flow through the composition.

A sand lift tool for use in a subterranean well can include an outer housing, an inner production tube positioned in the outer housing, and a dart received in the inner production tube. An annulus is positioned between the outer housing and the inner production tube. The dart can reciprocate in the inner production tube in response to variations in fluid flow between the annulus and an interior of the inner production tube. Another sand lift tool can include an outer housing, an inner production tube, and a sand collection annulus between the outer housing and the inner production tube. A flow area for fluid flow between the annulus and an interior of the inner production tube increases in response to an increase in a flow rate of the fluid flow.