Well completion and operation method for underground gas storage in water-bearing formation with inhomogeneous lithologic structure
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.
The invention relates to the gas industry and can be used in the construction and operation of underground gas storage facilities, mainly in aquifers, heterogeneous lithology.
The known method completion and operation of wells underground gas storage in the aquifer is heterogeneous lithological structure, including differentiated by the depth of the formation, the injection and extraction of gas from multiple injection and production wells, and as the formation of the gas volume in the injection wells isolate the lower part of the reservoir, open the top and make a selection from the upper part of the reservoir, however due to the transfer of wells with a low level of opening to the higher level reservoir to increase the number of sustainable production wells. (EN 2085457, IPC6B65G 5/00. The way to create underground storage in the aquifer is heterogeneous lithological structure. Publ. 27.07.1997).
There is a method aimed at solving the problem consists in the fact that in the process of formation of the gas volume in the reservoir due to the large difference in specific weights and viscosities of the injected gas and the displaced water is rapid movement of gas in prikrovatnyh parts of the reservoir when the stagnation in the lower parts of which dramatically reduces the potential amount of traps and reduces the volume of gas up to full irrigation wells. In the known method is carried out at a gas injection through wells having a low interval of the opening, which transferred part of the wells previously used for the formation of the gas-saturated zone in the lower part of the reservoir and completed his technological purpose as the pressure in the producing from the top, the least obvodnennyh parts of the collector. The number of wells that it is appropriate to bring on the upper part of the manifold is determined by the degree of vertical linkages in the reservoir, due to its layered heterogeneity, and updated on the basis of the analysis of the creation and operation of the repository.
The disadvantage of this method is the necessity of using a larger number of wells of various technological purposes. In addition, when implementing the method in wells that translate into the upper part of the reservoir, it is necessary to isolate the open interval in its lower part by cementing, and in the upper part of the reservoir these wells, on the contrary, to perforate and lead to the selection through the new sprocket holes, it is necessary to make additional costly manufacturing operations and activities associated with changing technological purpose wells.
The technical challenge which seeks claimed from Britanie, is to develop a method completion and operation of wells and underground gas storages by dividing the interval uncovered reservoir into two conditionally selected part to implement differentiated by the depth of injection and withdrawal of gas, with the ability to temporarily block outside and open working perforations in the corresponding cycle of operation of the well.
The technical result, which is aimed by the invention, is to provide alternate open working perforations and temporary blocking of outside perforations, which, in turn, increases the efficiency of wells and underground gas storage in General.
This technical result is achieved due to the fact that in the way that the completion and operation of wells underground gas storage in the aquifer is heterogeneous lithological structure, including differentiated by the depth of the reservoir injection and extraction of gas from the well, when the alternation of which one part of the reservoir is isolated and the other open, according to the invention in the construction of wells shall descend and cementing production casing casing with a packer separating the interval annular space with the vazhiny in the area of the reservoir into two conditionally on the selected portion, perforined production casing in both parts above and below the annulus packer, and then lowered into the borehole lifting column with annular packer so that when installing the tubing string annular packer was placed between the perforated areas of the production string, and then fill the space between the operational and the Elevator columns immiscible between portions nadakarni fluid, and during the further operation of the well pumping gas in the reservoir is produced through the lifting column and the lower perforation interval with temporary insulation of the top of the perforated interval of one of the portions nadakarni liquid and gas through the upper perforation interval in the annular space with temporary insulation the bottom of perforation interval another portion nadakarni liquid.
The essence of the proposed method is illustrated in the drawings, which schematically shows a production well underground gas storage injection (Fig.1) and selection (Fig.2) gas. The presented schemes are depicted: a production well 1 underground gas storage; reservoir 2 heterogeneous lithological structure; permeable interlayer 3 of the reservoir 2 heterogeneous lithological structure; production column 4 with an ex who she annulus packer 5; cement ring 6; the perforations of the lower interval 7 perforations and the upper interval 8 perforation; Elevator column 9 (for example, tubing (tubing)), equipped with annular packer 10 and the circulation valve 11; three servings nadakarni fluid 12, 13, 14, two of which (12, 14) the consistency of form blocking fluid isolation of these perforation intervals; in-line space 15.
The claimed method works as follows.
Operating the well 1 UGS are drilling to the full opening of the reservoir 2, and then descend to the specified well 1 production casing 4 below the soles of the reservoir 2 with overlapping throughout its thickness. The production casing 4 equip casing packer 5 so that when installing production casing 4 in the hole it was located in the interval permeable interlayer 3 of the reservoir 2 heterogeneous lithological structure. Then the production casing 4 cement by any known method, forming a cement ring 6. At the end of the injection of cement, prior to its setting, open annulus packer 5. After hardening of the cement production casing 4 and the resulting cement ring 6 perforined in the lower and upper parts of the reservoir 2 above and below sokolovogorskii 5 and permeable interlayer 3, resulting in the formation of the lower interval 7 and the upper interval 8 perforation.
Then in the well 1 down Elevator column 9 so that its lower end was 0.5-0.8 m above the upper holes of the lower interval 7 perforations. Elevator column 9 equip annular packer 10 and the circulation valve 11 so that when installing the tubing string 9 in the production string 4 circulating valve 11 located below the casing 5 and above 10 annular packers, and annular packer 10 is located between the bottom 7 and top 8 of the perforation intervals.
After installation of the tubing string 9 in the production string 4 starts injection (Fig.1) into the annular space through the circulation valve 11 nadakarni fluid with three portions (12, 13, 14), two of which (12, 14) for consistency are blocking liquids.
Portion 12 of the blocking fluid is placed in the well in the interval from the annular packer 10 to the level of 1.5 m above the upper hole of the upper interval 8 perforation. The volume of the portion 12 is equal to the volume of the corresponding plot of the annulus. Portions 14 of the blocking fluid equal to the volume of the gas space 15 in the area from the Shoe production casing 4 to the level of 2-2,5 m below the lower end of a set in her tubing string 9 (see Fig.2). When the volume of the upper level is pumped into the well 1 the other portion 14 of the blocking fluid have 100-150 m below the wellhead 1. The intermediate portion 13 nadakarni fluid fills the space between a previously calculated locations of the portions 12, 14 of the blocking fluid. Thus, the temporary blocking of the upper interval 8 perforation, and then the lower interval 7 perforation is due to the redistribution of amounts of the constituent parts of the post nadakarni liquid portions of the blocking fluid and pumped into the spacing intermediate portions nadakarni fluid in the well 1 during the injection and withdrawal of gas. So, part of the post nadakarni fluid portion 12 of the blocking fluid, isolating the upper interval 8 perforation and preventing from entering (return) of gas in the wellbore 1 when it is injected, is a viscous, inhibited, not containing solid phase system, isolating the upper interval 8 perforation without disturbing the reservoir properties (FES) reservoir 2 (see description below). Part of the post nadakarni fluid is the other portion 14 of the blocking fluid, isolating the lower interval 7 perforation in the selection through the upper interval of 8 perforations, preventing the return gas in the reservoir 2, is a viscous, inhibited, not containing solid phase system, isolating the lower interval 7 perforation b is C violations FES reservoir 2.
Thus, blocking fluid portions 12 and 14 represent the high viscosity of the system, the consistency of which do not allow these fluids to penetrate freely through the perforation holes, but at the same time, the properties of which allow it to move freely in the annular space during injection. Nagakura liquid intermediate portion 13 is less viscous, and its main purpose is to fill in the post nadakarni fluid space between the portions 12, 14 of the blocking fluid.
Blocking fluid portion 12 due to its high viscosity prevents the flow inside the production casing 4 through the holes of the upper interval 8 perforation of the gas injected into the reservoir 2 through the holes of the lower interval 7 perforations. Injected into the well 1 gas moving in the thickness of the extended reservoir 2 heterogeneous lithological structure, hugs permeable interlayer 3 small length and enters the upper prikoolno part of the reservoir 2. When the gas is not able to return into the well 1 through the holes of the upper interval 8 perforation due to the overlapping of their high viscosity liquid, one portion 12 of the blocking fluid, which, in turn, combined with overlapping annulus annular packer 10 is reliable is repetitive for admission up in the annulus of the well 1 gas injected into the well 1 through the Elevator column 9.
Density of all three portions nadakarni fluid is calculated depending on their size and condition of exceeding the total hydrostatic pressure of the column nadakarni fluid maximum operating pressure in the reservoir 2.
Before switching wells 1 with pump gas on its extraction from the reservoir 2 performs the following operations. Through a special surface binding wells all three portions nadakarni fluid is pumped in the reverse order of the annulus in the Elevator column 9 and below it, in Shoe production casing 4 (Fig.2). The portion 14 of the blocking fluid line fills the space 15 in the area from the Shoe production casing 4 to the level of 2-2,5 m below the lower end of the tubing string 9 and blocks the holes on the bottom of perforation interval of 7. The intermediate portion 13 nadakarni fluid is located above the portion 14 of the blocking fluid and fills the portion of the line space of the casing 4 and part of the inner space of the tubing string 9. The portion 12 of the blocking fluid fills the remaining portion of the tubing string 9 to the level of 100-150 m below the mouth of wells 1.
Thus, when pumping all three portions nadakarni fluid is reverse order open holes of the upper interval 8 perforation and overlap the holes on the bottom of perforation interval of 7 with preservation conditions exceeding the total hydrostatic pressure of the column nadakarni fluid maximum operating pressure in the reservoir 2. The gas comes from the annulus, where the gas flows from the reservoir 2 through the holes of the upper interval 8 perforation.
Before the next switching wells 1 with the selection gas on its injection into the reservoir 2, all three portions nadakarni fluid is pumped into the annulus in the original order, and so on. At each pumping compensate for the amount of servings, decreasing through natural attrition.
Thus, the implementation of the inventive method reduces the number of projected operating UGS wells, to increase the working capacity of the storage object gas by forcing produced water and reduce the impact of depression cones, which increases the efficiency of each production well UGS, reduce flowing the gas through the reservoir and water-coning of water, lower the water factor in the production in the selection, to eliminate the effect of cyclic loads, since the injection and sampling wells will operate in one mode, and to increase the duration of the overhaul period of the well.
Method completion and operation of wells underground gas storage in the aquifer is heterogeneous lithological structure, including di is terenziani depth reservoir injection and extraction of gas from the well, when the alternation of which one part of the reservoir is isolated and the other opened, characterized in that the construction of wells shall descend into it and further cementing of the production casing with casing packer separating the interval annular space of the borehole in the zone of the reservoir into two conditionally on the selected portion, perforined production casing in both parts above and below the annulus packer, and then lowered into the well is equipped with a circulating valve lifting column with annular packer so that when installing a tubing string in the production casing mentioned circulating valve located below the annular packer and above the annular seal, and annular packer between the perforated areas of the production string, then fill the space between the operational and the Elevator columns immiscible between portions nadakarni fluid, and during the further operation of the well pumping gas in the reservoir is produced through the lifting column and the lower perforation interval with temporary insulation of the top of the perforated interval of one of the portions nadakarni liquid and gas through the upper perforation interval in the annular space with temporary insulation bottom of perforation interval have the portion nadakarni fluid.
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
EFFECT: simplified control, higher safety and reliability.
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
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.
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.
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: packing industry.
SUBSTANCE: invention relates to the method of carbon dioxide (CO2) storage in a porous and permeable underground reservoir bed) and in particular, to the method for injection of CO2 into a hydrocarbon reservoir for its storage. The concept of the invention is as follows: the method includes the following stages: (a) extraction of a produced fluid flow from a development well, which contains produced hydrocarbons, water and CO2; (b) direction of the produced fluid flow to a process facility, where a steam phase flow is separated from this flow, containing carbon dioxide and volatile hydrocarbons; (c) compression of the produced steam phase flow to the pressure above the maximum pressure, when two phases of gas and liquid may coexist, for the composition of the produced steam phase flow; (d) cooling of the compressed flow with formation of the cooled flow in a dense phase condition; (e) direction of the CO2 flow towards the injection equipment, which arrives from the side and may be in a liquid phase or in a supercritical condition; (f) mixing of the cooled flow from the stage (d) with the flow of CO2 arriving from the side to form a combined flow, which represents a flow of a dense phase substance; and (g) injection of the specified combined flow into the hydrocarbon reservoir via an injection well.
EFFECT: increased efficiency of the method.
22 cl, 2 dwg
SUBSTANCE: invention relates to making underground reservoirs in rock salt formations. Reservoir is profiled using concentrically arranged tubes to lift brine, feed water and production pipes. Thereafter, water feed pipe is withdrawn to feed water feed column composed of flexible water feed pipe. Then, reservoir shape is corrected by feeding solvent at reservoir correction point via gap between brine lift tube and flexible water feed pipe of said column. Additionally, device comprises water feed column with flexible water feed pipe ropes arranged in symmetry about is cross-section and passed through rings rigidly secured to flexible pipe at regular spacing to connect flexible pipe bottom end with auxiliary winches.
EFFECT: expanded operating performances.
2 cl, 2 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.
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.
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.
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.
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.
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