Method of sludge waste disposal in the operating underground salt chamber

FIELD: mining.

SUBSTANCE: method of disposal of sludge waste with a density greater than the density of the formed brine in the salt chamber includes exploited wells arranged concentrically by the water supply equipment, brine-picking and slurry-supply columns of pipes, in the solvent and the waste supply chamber, the extraction of brine. In underground mines three processing zones are created: the zone of forming saturated brine (hp), buffer zone (hb), waste slurry placing zone (hw) with a ratio between hp:hb:hw = 1:0.5:0.25 and with slurry waste supply to the placement zone at a rate not lower than 0.2 m/sec.

EFFECT: invention enables simultaneous testing of a mineral and slurry waste placement.

2 dwg



Same patents:

FIELD: oil and gas industry.

SUBSTANCE: stratum is impact cyclically, at that each cycle of impact includes gas injection to the stratum with further gas extraction. The stratum is impacted during 10 cycles at least. In each cycle current formation pressure as well as gas extraction (or injection) volume is measured simultaneously in gas- (Pt''ф'') and water-bearing (Pt''фв'') zone of the storage facility, then considering the measured parameters the design pressure in the underground storage facility (Pt''P'') is defined for the facility operation mode without gas losses and operation mode with gas losses. Then function (F) is defined as arithmetic mean value of deviations (Pt''P'') from (Pt''ф''), which are received for each ith measurement for the facility operation mode without gas losses and the function (Fy) for the facility operation mode with gas losses and when inequality Fy<F is satisfied the summary is made about available gas leaks in the storage facility.

EFFECT: simplifying control of gas leak-tightness, improving reliability and safety of the underground storage facilities made in the water-bearing strata.

1 tbl

FIELD: oil and gas industry.

SUBSTANCE: method includes alternating gas injection and extraction to/from the well and during their alternation one part of the reservoir bed is isolated while the other is penetrated. According to the invention at the well construction stage the production string with a cement-inflatable packer is run in to the well and cemented; at that the packer divides the borehole annulus in the reservoir bed area into two conditional parts. The production string is perforated in both parts above and below the cement-inflatable packer. Thereafter a tubing string with a tubing-casing packer equipped with a circulation valve is run in so that when the tubing string is set to the production string the above circulation valve is placed below the cement-inflatable packer and above the tubing-casing packer between the perforated sections of the production string. Then the space between the production and tubing strings are filled with immiscible portions of the packer fluid. During further operation of the well injection of gas to the reservoir bed is made through the tubing string and lower perforation interval with temporary isolation of the upper perforation interval by one of the packer fluid portions while gas extraction is made through the upper perforation interval and tubular annulus with temporary isolation of the lower perforation interval by the other portion of the packer fluid.

EFFECT: increased efficiency of the method.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention is related to the area of oil and gas industry and intended for operation of underground gas storage (UGS) operation. At UGS with arranged producers with storage collector opening cyclic injection of natural gas is made with creation of its buffer and active volume and extraction of the gas active volume. In process of the UGS operation carbon dioxide in injected to the lower part of the storage thus replacing natural gas in the buffer volume. At the end of natural gas extraction cycle the boundary line of carbon dioxide and natural gas reaches the lower openings in the perforation interval of the producers.

EFFECT: invention ensures increase in active volume of stored natural gas in the UGS and reduction of costs for formation of the buffer volume.

FIELD: oil-and-gas industry.

SUBSTANCE: invention can be used in permafrost regions with hydraulically isolated lenses of underground smelt water bearing sand collectors, cryopag (CP), for burial of drilling wastes (DW). Proposed method comprises drilling of one injection well in CP and at least one CP relieving well. Besides, it includes pressure pre-decrease in CP by forcing water-sand pulp via said CP relieving well. Decreased pressure stabilised in injection well, uniform mix of drilling wastes and at least 10 wt. % of crushed ice made from sea water or water pumped from CP with additional of the mix of fluid hydro geological indicator (HGI). Note here that drill wastes are continuously subjected to audio frequency vibrator effects nearby suspended tubing shoe. Injection is continued unless HGI traces appear in pulp forced from relieving well. Then, drilling waste injection into CP, their vibration and pumping of pulp from CP are terminated to eliminate RW. For burial of extra volume of drilling wastes, another RW is constructure to go on injecting of drilling wastes via the same IW with their vibration and application of another RW.

EFFECT: ecologically safe and efficient process.

2 cl, 1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: in compliance with this method, seam is subjected to cycling, every cycle including gas injection therein with subsequent gas withdrawal. Cycling includes at least 10 cycles. Current seam pressure (Ptf) and gas withdrawal (or injection) volume are measures at regular intervals in every cycle. Measured parameters allowed for design pressure in underground storage facility (Ptd) is determined for facility operation without gas leaks and with leaks. Function (F) is defined as mean arithmetic value of (Ptd) deviations from (Ptf) obtained at every ith measurement for operation without leaks and function (Fl) for operation with leaks. Given Fl<F, leaks are considered available.

EFFECT: simplified control, higher safety and reliability.

1 tbl

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises construction of wells with exposure of geological structure with pods and pool cap, injection of gas into said structure to force formation water downward from pool cap with prevention of gas escape from the boundaries of geological structure and gas extraction from underground storage (UGS) top section. Note here that availability of superhigh-seam-pressure formation water deposits with dissolved and/or dispersed gas is checked in region with geological structure intended for underground gas storage. Production wells are made with exposure of said deposit, water with dissolved and/or dispersed gas is extracted there through and bypassed into aforesaid geological structure. Gas extraction from UGS is carried out after extraction of dissolved and/or dispersed gas from water and their immiscibility. Water with dissolved and/or dispersed gas is bypassed from superhigh-seam-pressure geological structure is carried out as pressure in UGS decreases owing to gas extraction.

EFFECT: use of dispersed and dissolved gas in abyssal aquifers.

1 ex, 1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to environmental protection against man-made contaminants, hothouse gases and power source synthesis. In compliance with proposed invention, this method comprises isolation of aquifer with, preferably, with cropout and feed area as, for example, a river, lake, sea with total active filtration conditions. At least one local trap is isolated in isolated bed. Selected aquifer and local trap are prepared for commercial use with definition of isolated aquifer water chemical composition and that of rocks by core sample. Carbon dioxide is injected to isolated aquifer via one injection well located on aquifer feed zone side to allow downstream of injected carbon dioxide in aquifer. Catalytic reaction of polycondensation synthesis of injected carbon dioxide and water to form hydrogen, oxygen and methane homologues.

EFFECT: higher efficiency of recovery for replenishment of hydrocarbons stores and development of new oil and gas deposits.

11 cl, 4 dwg

FIELD: transport.

SUBSTANCE: proposed storage comprises reinforced concrete tank mounted on the bed of compacted soil and heat-isolation layer and having vertical sidewalls, said being surrounded by pliable layer at outer side surface and heat- and water-insulated from liquefied natural gas. Storage shaft is equipped with pipelines to fill said storage with said gas and its vapors and to discharge the latter therefrom. Said shaft extending from reinforced concrete tank to surface is equipped with tight hatches and staircase. Tank top is buried in the heat-insulation material layer. Note here that tank top features cross-section decreasing towards earth surface and is shaped to truncated cone and connected with said shaft by sealed flange joint. Aid tank top with flange joint are arranged at decreased spacing from frozen soil bottom surface.

EFFECT: simplified design.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: operating method of underground gas storages involves intermittent injection of gas by compressors, which is supplied from a main gas line through production and injection wells of an underground gas storage to a reservoir bed under pressure exceeding formation pressure; further extraction of gas from the underground storage for further gas supply to the main gas line. The above extraction from the underground storage and its supply to the main gas line is performed in a compressor mode that is performed till pressure in the reservoir bed reaches the value excluding allowable well water flooding. With that, a suction gas line of compressor is connected to a gas extraction pipeline from the underground gas storage, and a discharge gas line of compressors is connected to the main gas line.

EFFECT: improving operating efficiency of an underground gas storage.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to a method for making a low-permeability screen in porous medium at underground gas storage in porous reservoir beds and can be used in oil and gas producing industry. According to the invention, first, required volumes of solutions are determined in interwell spaces; the amount of 0.5-0.55 of design volume of spike solution and spike solution itself are pumped subsequently to injection wells till gases appear in a relief well; after that, design volumes of the solution and gas, which provide minimum required width of a screen, are pumped to the unloading well; waste gas of compressor stations is used as gas for creation of a screen. Nonflammable and/or inert gases are used as gases for creation of the screen.

EFFECT: increasing the screen continuity, reducing the flow rate of foaming agent solution and consumed energy for pumping-in and pumping-out, economy of natural gas and improvement of environmental situation in the underground gas storage location area.

3 cl, 6 tbl, 4 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes performing a test pumping of liquid waste into absorbing well before operational pumping, while changing flow step-by-step. From equation of absorption base hydrodynamic parameters are determined for calculation of predicted coefficients of operation characteristics of absorbing well and reserve well. During operational pumping of liquid waste together with thermometry along absorbing well shaft, registration of actual pressures and flow on pump devices, actual pressures on mouth in tubing pipes of absorbing well, actual pressures on face are additionally registered in absorbing well as well as pressures on mouth in behind-pipe space, actual loss at mouth in behind-pipe space, actual loss of waste on mouth, actual positions of face well, upper and lower limits of absorption range from well mouth. In reserve well actual pressures on face are registered, as well as actual positions of liquid level from reserve well mouth, upper and lower limits of absorption range. Prediction coefficients are compared for operation characteristics of absorbing well and reserve well to actual coefficients. 9 conditions of hydrodynamic bed conditions at reserve well and absorbing well are considered during pumping of waste. Specific actions of operator on each condition are described.

EFFECT: higher reliability and trustworthiness.

1 ex

FIELD: mining industry.

SUBSTANCE: method includes compressing gas at compressor station to required feed pressure, and utilization of drop liquid, containing drops of compressor oil and gas, before gas-distributing substation with following pumping of gas into well. Utilization of drop liquid is performed via slanted cylindrical separator of centrifugal type and deep chemical cleaning block in form of two parallel-placed absorbers, operating alternately with replacement of processed absorbents. Separator and two absorbers are mounted at tank for collecting compressor oil.

EFFECT: higher efficiency.

2 dwg, 1 tbl

FIELD: gas, oil, oil refining and other industries.

SUBSTANCE: invention relates to building and operation of underground reservoir in stable rocks, for instance, soluble salt deposits. Method includes delivery of water and putting out brine along water feed and brine lifting pipes placed one inside the other, charging and storing of gas in underground reservoir. After brine lifting, reservoir is dried and then is filled up with alternating layers of absorbent and inert porous material, volume ratio 2:1, delivered along clearance between water feed and brine lifting pipes. Brine lifting pipe is perforated in lower part in height of reservoir and it is installed in lower part of reservoir. Difference between angles of repose of absorbent and inert material does not exceed 10 degrees. This done, reservoir is filled with gas delivered along perforated brine lifting pipe.

EFFECT: increased productive volume of reservoir owing to sorption of gas on surface of absorbent, reduced cost of gas storing.

1 dwg

FIELD: mining industry.

SUBSTANCE: method includes driving a mine for cleaning sump and connecting it to sump in such a way, that mine soil for cleaning sump in place of connection is placed at level of shaft bottom, construction of water collector, located outside the shaft, and its connection with mine for cleaning sump, mechanized cleaning of sump. Transporting slope is driven to level of sump cleaning. Then water collector is driven. Mine for cleaning sump is driven with deflection towards water collector. Sump cleaning is performed by delivering spillage along transporting slope.

EFFECT: simplified operations, lower laboriousness.

6 cl, 5 dwg

FIELD: construction of underground reservoirs in rock salt.

SUBSTANCE: according to proposed method, hydrodynamic coupling is formed between casing tube strings to force gaseous nonsolvent from one well into the other. Solvent is delivered along suspended strings of tubes of first well, and brine is taken out along suspended strings of tubes of second well until gas pressure is built on head of first well required for setting gas -brine interface to new stage of rock dissolution, and maintaining of preset thickness of insulating layer of gaseous nonsolvent in top of dissolution stage in process of formation of first underground reservoir of ground is carried out at corresponding pressure rise on head of second well obtained by control of delivery of solvent and taking out of brine.

EFFECT: reduced consumption of gas at building underground reservoirs.

3 dwg

FIELD: transport and storage devices, particularly for building underground reservoirs.

SUBSTANCE: method involves placing adjusting pipe string bottom of directionally drilled well in horizontal position at well outlet; arranging preparation underground excavation for design tunnel reservoir height at initial stage of rock solution between casing and adjusting pipe strings of directionally drilled well; ejecting non-solvent in casing pipe strings along with maintaining non-solvent-brine interface in upper part of preparation excavation or in the case of stepped rock solving at level of each underground tunnel reservoir stage forming; maintaining non-solvent-brine interface in vertical well at level or above level of non-solvent-brine interface of preparation excavation.

EFFECT: increased efficiency of underground tunnel building.

6 dwg

FIELD: construction of underground reservoirs in rock salt.

SUBSTANCE: method involves obtaining solvent by mixing brine with sweet water by supplying low-mineralized solvent from one reservoir under construction having the lesser volume of excavated cavity; solving rock along with maintaining predetermined flow rate of sweet water and conditioned (saturated) brine to be removed; discharging non-conditioned (low-mineralized) brine for following resaturation from above underground reservoir under construction having the lesser volume of excavated cavity; serially finishing construction of underground reservoirs of the group; constructing one or several following reservoirs of above storage facility and uniting the reservoirs with ones under construction.

EFFECT: increased efficiency of storage facility due to improved rationality of rock solution in reservoir group.

2 dwg

FIELD: liquid storage, particularly building underground reservoirs for liquid in soluble rock.

SUBSTANCE: method involves solving rock in several levels, wherein vertical preparation mine is preliminary formed before each layer solving. Natural gas is used as nonsolvent. Gas-brine interface is provided and maintained above top of level to be developed and natural gas is injected in vertical preparation mine. Then interface border is lowered to above top or below it. After level development the interface is increased and maintained above top of next upper level to be developed. All above operations are repeated at the next level.

EFFECT: reduced time of reservoir building and increased reliability.

3 cl, 4 dwg

FIELD: automatic control of underground reservoir construction in soluble sedimentary rock, particularly underground liquid or gaseous hydrocarbon deposit constriction and underground industrial and radioactive waste storage.

SUBSTANCE: device comprises automatic measuring system for brine parameters determination. The measuring system comprises measuring unit with sensors to be installed directly in brine line and recording unit. Device also includes multi-channel receiving converter for information gathering and control unit, as well as ultrasound sensors linked to flowmeter. Information gathering unit output is associated with PC.

EFFECT: possibility of device usage for several underground reservoirs construction, extended range of technological parameters to be controlled during reservoir construction and increased accuracy of brine concentration determination.

2 cl, 1 dwg

FIELD: oil-producing industry; gas-production industry; methods of construction and elimination of the earth storages-collectors of the boring wastes.

SUBSTANCE: the invention is pertaining to the field of the environmental protection, in particular, to the methods of construction and elimination of the earth storages-collectors of the boring wastes at completion of the oil-and-gas boreholes construction. The technical result of the invention is erection of the effective water-insulating screen, reduction of the time of evaporation of the water from the liquid phase of the boring wastes, decrease of the material inputs for realization of the method. The method of construction and elimination of the earth storages-collectors of the boring wastes provides for the digging of the ditch in the mineral soil, screening the ditch bottom and walls for the water insulation, filling-up of the earth storages-collector with the boring wastes, lamination of the boring wastes by settling into the thickened and liquid phases, the liquid phase pumping out, evaporation of the water from it, covering over the thickened stage with the mineral soil, conduct formation of the water-insulating screen by hydrophobization of the soil of the ditch bottom and walls by the soil impregnation in depth of 5-15 cm with the 0.1-1.0 % density microemulsion spontaneously formed at addition in the water of the reactant РДН-1 -concentrate of the asphaltic-resinaceous and paraffinic components of petroleum in the volatile hydrocarbon solvent with the subsequent compaction and aging. After the pumping out the liquid phase is sputtered over the flattened section of the land allocated for construction of the borehole, on which they preliminary put the mineral soil of 25-30 cm thick taken from the walled ditch. After the water evaporation it is used for hydrophobization of the soil together with the dried up boring wastes by sputtering of the above indicated microemulsion at its consumption of 5-10 l per m2 of the ground surface. Then the indicated soil is removed and fully is used for covering of the thickened phase of the boring wastes in the earth storages-collectors of the boring wastes.

EFFECT: the invention ensures erection of the effective water-insulating screen, reduction of the time of evaporation of the water from the liquid phase of the boring wastes, decrease of the material inputs for realization of the method.

2 ex, 3 dwg