CN113153228B - System for discharging brine and increasing capacity of gas storage, tubular column device and using method of system - Google Patents
System for discharging brine and increasing capacity of gas storage, tubular column device and using method of system Download PDFInfo
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- CN113153228B CN113153228B CN202110376957.6A CN202110376957A CN113153228B CN 113153228 B CN113153228 B CN 113153228B CN 202110376957 A CN202110376957 A CN 202110376957A CN 113153228 B CN113153228 B CN 113153228B
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000007599 discharging Methods 0.000 title claims abstract description 10
- 239000012267 brine Substances 0.000 title claims description 23
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 title claims description 23
- 150000003839 salts Chemical class 0.000 claims abstract description 80
- 239000007921 spray Substances 0.000 claims abstract description 54
- 238000004891 communication Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 52
- 238000002347 injection Methods 0.000 claims description 47
- 239000007924 injection Substances 0.000 claims description 47
- 238000007789 sealing Methods 0.000 claims description 37
- 239000004576 sand Substances 0.000 claims description 32
- 239000011148 porous material Substances 0.000 claims description 17
- 238000005507 spraying Methods 0.000 claims description 10
- 230000008021 deposition Effects 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 3
- 239000004047 hole gas Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 27
- 239000013049 sediment Substances 0.000 abstract description 4
- 229910052736 halogen Inorganic materials 0.000 abstract 1
- 150000002367 halogens Chemical class 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 94
- 239000010410 layer Substances 0.000 description 25
- 239000002689 soil Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 238000010420 art technique Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/114—Perforators using direct fluid action on the wall to be perforated, e.g. abrasive jets
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/28—Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/16—Modification of mine passages or chambers for storage purposes, especially for liquids or gases
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a system for discharging halogen and increasing capacity of a gas storage, a tubular column device and a using method thereof. A pipe string device for a salt cavern gas storage, comprising: a fluidic sleeve configured to be provided with a fluidic channel; a spray head including a spray hole, the spray head being provided at a lower end of the jet sleeve, communicating with the jet passage, the spray head being configured to have two states of being opened and closed; and a screen hole part including a screen hole provided in a casing wall of the jet casing, the screen hole part being configured to have both an open state and a closed state, the screen hole communicating the jet passage of the jet casing with the outside when the screen hole part is in the open state, and the screen hole interrupting the communication of the jet passage of the jet casing with the outside when the screen hole part is in the closed state. The invention can make the pipe column device enter into the deeper sediment in a jet flow mode, thereby removing more water and more effectively increasing the storage space.
Description
Technical Field
The invention relates to the technical field of salt cavern gas storage, in particular to a system for discharging brine and increasing volume of a gas storage, a tubular column device and a using method thereof.
Background
At present, exhausted oil-gas reservoir and salt cavern gas reservoir are built in underground gas reservoirs in China, salt mines in China generally have the characteristics of multiple mineral layers, thick interlayer, shallow buried layer and the like, and high-quality salt mine resources suitable for building the salt cavern gas reservoir are lacked, so that the effective storage space of the built salt cavern gas reservoir is expanded as much as possible.
After a field engineering unit finishes a drilling process, in order to save expenses, large drilling equipment is removed, only small and medium-sized equipment such as a pump machine, a compressor and the like are left, after a cavity is built, a cavity area, a brine area and a deposition area which is insoluble in water and falls off exist in the cavity, and the deposits have soft physical properties and are easy to be dispersed by high-pressure water power; because the interlayer thickness and the external environment such as geology are different, the occupied capacity of the water and insoluble substance layers in the cavity is 1/4-1/2 of the whole cavity, and if the excess water can be drained, the gas storage amount in the gas storage reservoir can be increased by 10% -20%.
At present, the storage characteristic conditions of the salt cavern gas storage are analyzed, and in most of field projects of the salt cavern gas storage, an effective process of putting a water injection sleeve into a salt cavern deposition layer does not exist, so that a large amount of brine exists in a cavity of the gas storage, and the volume of the cavity is occupied.
From the present situation of current salt cavern gas storage, because the distance of salt cave mouth and stratum insoluble substance is unclear, the water layer in the cavity can't be judged, even with the sleeve pipe of going into salt cavern gas storage down, most sleeve pipes all remain in stratum insoluble substance upper portion, can't take away too much liquid to the storage capacity of gas in the gas storage has been reduced. For example, in the project of putting the water injection casing pipe into the sedimentary deposit, the heavy hammer method or the method of rotating the pipe column is adopted to enter the sedimentary deposit, because the friction coefficient of rock soil is large, the casing pipe cannot be put into the position of the deeper area of the sedimentary deposit, if the thickness of the sedimentary deposit is deep, the water quantity of the deeper layer cannot be discharged, the storage capacity cannot be met to the maximum extent, and the loss of the casing pipe in the putting-in process is greatly increased.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention aims to provide a system, a column device and a method for salt cavern gas storage brine discharge and volume increase, so that the column device can conveniently enter deeper sediments, thereby removing more water and effectively increasing the storage space.
The invention firstly provides a pipe column device for a salt cavern gas storage, which comprises:
a fluidic sleeve configured to be provided with a fluidic channel;
a spray head including a spray hole, the spray head being provided at a lower end of the jet sleeve, communicating with the jet passage, the spray head being configured to have two states of being opened and closed;
and a screen hole part including a screen hole provided in the sleeve wall of the jet sleeve, the screen hole part being configured to have both open and closed states, the screen hole communicating the jet passage of the jet sleeve with the outside when the screen hole part is in the open state, and the screen hole interrupting the communication of the jet passage of the jet sleeve with the outside when the screen hole part is in the closed state.
According to an embodiment of the present invention, the head further includes a housing provided with an outer hole, the housing being configured to be rotatable around the injection hole, the outer hole communicating with the injection hole when the housing is rotated to one of the states.
According to one embodiment of the invention, the injection openings are provided on the jet sleeve or on a separate piece which is connected to the jet sleeve.
According to one embodiment of the present invention, the screen hole portion includes a sand screen and a sealing slide sleeve, the screen hole is disposed on a peripheral wall of the sand screen, the sealing slide sleeve is disposed outside or inside the peripheral wall of the sand screen, and the sealing slide sleeve is configured to slide axially relative to the sand screen.
According to one embodiment of the invention, the sand screen is part of or separate from the jet casing and is disposed between the upper and lower sections of the jet casing.
According to one embodiment of the invention, the injection holes comprise a set of holes, preferably four; the sieve tube is a sintered sieve tube, the filter layer is composed of a sintered sieve, the overflowing area is large, the strength is high, the sieve tube has impact resistance, corrosion resistance and strong anti-blocking capability, the overflowing area can reach 20%, and the sand prevention particle size is more than 0.1 mm.
The invention also provides a method for using the pipe column device for the salt cavern gas storage, which comprises the following steps:
enabling the sieve pore part to be in a closed state, enabling the spray head to be in an open state, injecting liquid through the jet flow channel, and enabling the liquid to be sprayed out through the spray head, so that the spray head and the tubular column device integrally move along the spraying direction;
and enabling the sieve pore part to be in an open state, enabling the spray head to be in a closed state, and increasing the air pressure of the environment where the tubular column device is located, so that the liquid outside the sieve pore part flows into the jet flow channel through the sieve pores and is discharged from the upper end of the jet flow channel.
According to one embodiment of the invention, the housing of the spray head is controlled to rotate in a remote control manner, so that the spray head is in an open state or a closed state.
According to one embodiment of the invention, the sealing sliding sleeve of the sieve hole part is controlled to slide along the axial direction in a remote control mode, so that the sieve hole part is in an opening state or a closing state.
The invention also provides a brine discharge capacity increasing system for the salt cavern gas storage, which comprises a gas injection pressurizing sleeve and the pipe column device for the salt cavern gas storage, wherein the pipe column device and the gas injection pressurizing sleeve are respectively communicated with the salt cavern gas storage, the pipe column device is configured to spray liquid and liquid for melting salt mine to the salt cavern gas storage, and the gas injection pressurizing sleeve is configured to inject gas to the salt cavern gas storage so as to increase the gas pressure in the salt cavern gas storage.
The invention also provides a method for halogen-discharging and capacity-increasing of a gas storage, which comprises the following steps: the method comprises the steps of respectively communicating a pipe column device and a gas injection pressurizing sleeve with a salt cavern gas storage, injecting liquid into the pipe column device to enable the pipe column device to advance to the bottom of the salt cavern gas storage in an injection mode, melting salt ores of the salt cavern gas storage through the liquid injected by the pipe column device, injecting gas into the salt cavern gas storage through the gas injection pressurizing sleeve after the salt ores are melted to increase the gas pressure in the salt cavern gas storage, and sucking the melted liquid through the pipe column device to drain the liquid, so that the purposes of discharging brine and increasing the volume of the gas storage are achieved.
The invention can lead the pipe column device to enter deeper sediments in a jet mode, thereby removing more water, further effectively increasing the storage space, namely increasing the volume of the gas storage, realizing the expansion and having great significance for the construction of the salt cavern gas storage.
Drawings
FIG. 1a is a schematic diagram of a conventional method for positive circulation water injection into salt caverns;
FIG. 1b is a schematic diagram of a conventional reverse circulation water injection method for salt caverns;
FIG. 2 is a schematic front view of a semi-sectional structure of a cavity of a salt cavern gas storage according to an embodiment of the invention;
FIG. 3 is a schematic top view of a pipe column device and a gas injection laminated sleeve on the cavity of the salt cavern gas storage according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a tubular column apparatus according to another embodiment of the present invention;
reference numerals:
A. a fresh water injection port, a brine discharge port, an oil or air cushion layer injection port, a middle pipe, a central pipe, a bottom pit and a brine discharge port;
1. the device comprises a salt cavern gas storage cavity, 2 parts of a brine layer, 3 parts of an insoluble substance layer, 4 parts of a jet sleeve, 5 parts of a sand control screen pipe, 6 parts of a sealing sliding sleeve, 7 parts of a spray head, 8 parts of a gas injection laminated sleeve.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.
In the prior salt cavern gas storage, when the volume and the bottom position of the gas storage are judged, brine is filled into the target gas storage through a fresh water injection port A in a forward circulation water injection mode as shown in figure 1a or a reverse circulation water injection mode as shown in figure 1b, salt-soluble substances are gradually dissolved, but part of insoluble solid substances directly fall to the bottom of the gas storage to form a deposition layer. When waiting to the gas storage storehouse cavitation, carry out the gas injection and discharge the operation engineering of brine through brine discharge port B through oil or air cushion layer filling opening C with the mode of gas injection pressure boost, but owing to there is the certain distance between lower casing pipe and the sedimentary deposit, lead to brine can not get rid of completely, from last to having gas layer, water layer and insoluble layer down simultaneously in the gas storage storehouse. The insoluble layer is located at the pit F.
The column device in the above solution may essentially comprise nested intermediate tubes D and central tube E as shown in fig. 1a or 1 b.
In the engineering scheme aiming at the continuous penetration of the casing, the piling method is relatively common, namely, the casing is vertically downwards put into a target stratum under the action of external force by using a hammering mode, but a large amount of manpower, material resources and financial resources are consumed by the method due to the hammering force and the frictional resistance of soil in the stratum.
In view of the fact that when a heavy hammer method or a rotating pipe column method is adopted to enable a pipe column device to enter a deposition layer, the pipe column device cannot be lowered into a position of a deeper area of the deposition layer due to the fact that the friction coefficient of rock soil is large, the invention provides a device and a system for sinking the pipe column device in a spraying mode and a using method, namely, high-pressure liquid can be injected into the pipe column device, the high-pressure liquid impacts the deposition layer in a liquid spraying mode to form a hole body on the deposition layer, the pipe column device can sink along the formed hole body to be lowered to the deeper area, and then more liquid in a salt cavern gas storage can be discharged through the pipe column device, and the liquid is usually water.
The invention firstly provides a pipe column device for a salt cavern gas storage, which comprises:
a fluidic sleeve 4 configured to be provided with a fluidic channel;
a spray head 7 including a spray hole 71, provided at a lower end of the jet casing 4, communicating with the jet passage, the spray head 7 being configured to have both an open state and a closed state;
and a screen hole portion including a screen hole 51 provided in the casing wall of the jet casing 4, the screen hole portion being configured to have both open and closed states, the screen hole 51 communicating the jet passage of the jet casing 4 with the outside when it is in the open state, and the screen hole 51 interrupting the communication of the jet passage of the jet casing 4 with the outside when it is in the closed state.
When the sieve pore part is in a closed state and the spray head 7 is in an open state, injecting liquid through the jet flow channel and spraying the liquid through the spray head 7 so as to enable the spray head 7 and the whole pipe column device to move along the spraying direction;
when the sieve holes are opened and the nozzle 7 is closed, the atmospheric pressure of the environment in which the column device is located is increased, so that the liquid outside the sieve holes flows into the jet flow channel through the sieve holes 51 and is discharged from the upper end of the jet flow channel, and the liquid in the salt cavern can be discharged.
According to an embodiment of the present invention, the spray head 7 further includes an outer case provided with an outer hole or an inner case provided with an inner hole, the outer case or the inner case being configured to be rotatable around the spray holes, the outer hole or the inner hole being communicated with the spray holes 71 when the outer case or the inner case is rotated to one of states, so that liquid, such as high-pressure water, can be sprayed through the spray holes 71; in other states, the outer case or the inner case shields the ejection holes 71 so that liquid cannot be ejected through the ejection holes.
According to one embodiment of the present invention, the rotation of the outer shell or the inner sleeve can be realized by controlling the motor driving device through the circuit control module.
The motor driving device may be disposed at an upper end (not shown) of the column device, and an output shaft thereof is connected to the outer casing or the inner casing, and the motor rotates to drive the outer casing or the inner casing to rotate relative to the jet flow casing 4, thereby achieving a shielding state or a communication state of the outer casing or the inner casing and the jet hole 71. For those skilled in the art, such implementation can be realized by the prior art, and thus, the detailed description is omitted here.
Of course, the rotation of the outer housing or inner housing can be achieved by other prior art techniques, and the above-mentioned manner is not intended to limit the present invention.
The circuit control module is electrically connected with the motor driving device.
The switch of the circuit control module can be arranged on the tubular column device or designed to be remote control type, and the action of the tubular column device can be controlled through remote operation.
According to one embodiment of the invention, the injection openings 71 are provided on the fluidic cartridge 4 or on a separate piece which is connected to the fluidic cartridge 4.
According to one embodiment of the present invention, as shown in fig. 2, the screen section comprises a sand screen 5 and a sealing sleeve 6, wherein the sand screen 5 is provided with screen holes 51, the sealing sleeve 6 is arranged outside or inside the sand screen 5, and the sealing sleeve 6 is configured to slide axially relative to the sand screen 5. When 6 sliding distances of sealed sliding sleeve 5 from the sand control screen pipe during a certain distance, sealed sliding sleeve 6 no longer shelters from sieve mesh 51 to sieve mesh 51 communicates inside and outside jet passage, and when 6 sliding distances of sealed sliding sleeve 5 sand control screen pipe and sheltered from sieve mesh 51, sealed sliding sleeve 6 is sealed with the jet passage at sieve mesh position, thereby can not make jet passage here with outside intercommunication.
According to an embodiment of the present invention, the sliding of the sealing sliding sleeve 6 can be realized by the circuit control module controlling the hydraulic piston device to reciprocate up and down.
When the sealing sliding sleeve 6 is driven to slide by the up-and-down reciprocating motion of the hydraulic piston device, the electric control valve on the oil inlet pipe can be controlled to be opened by the circuit control module, pressure liquid in the oil inlet pipe pushes the hydraulic piston to move downwards through the pressure liquid channel to drive the sealing sliding sleeve 6 to slide downwards, or the electric control valve on the oil return pipe can be controlled to be opened by the circuit control module, and the pressure liquid pushes the hydraulic piston to move upwards through the backflow of the oil return pipeline to drive the sealing sliding sleeve 6 to slide upwards. The oil inlet pipe, the oil return pipe, the electric control valve and the hydraulic piston can be arranged at the upper end of the tubular column device. For those skilled in the art, this implementation can be realized by the prior art, and thus, the detailed description is omitted here.
Of course, the sliding of the sealing sliding sleeve 6 can also be realized by other prior arts, and the above manner is not a limitation of the present invention.
According to one embodiment of the invention, the sand screen 5 is part of or separate from the jet casing 4, and the sand screen 5 is disposed between the upper and lower sections of the jet casing 4.
According to one embodiment of the present invention, the injection holes 71 comprise a set of holes, preferably four.
According to one embodiment of the invention, the sieve tube is a sintered sieve tube, the filter layer is composed of a sintered sieve, the overflowing area is large, the strength is high, the sieve tube has impact resistance, corrosion resistance and better anti-blocking capability, the overflowing area can reach 20%, and the realized sand prevention particle size is more than 0.1 mm.
As shown in fig. 4, the jet casing 4 of the column apparatus is provided with a sieve hole 51 and a jet hole 71.
The invention also provides a method for using the pipe column device for the salt cavern gas storage, which mainly comprises the following steps:
enabling the sieve pore part to be in a closed state, enabling the spray head to be in an open state, injecting liquid through the jet flow channel, and enabling the liquid to be sprayed out through the spray head, so that the spray head and the tubular column device integrally move along the spraying direction;
and enabling the sieve pore part to be in an open state, enabling the spray head to be in a closed state, and increasing the air pressure of the environment where the tubular column device is located, so that the liquid outside the sieve pore part flows into the jet flow channel through the sieve pores and is discharged from the upper end of the jet flow channel.
According to an embodiment of the present invention, the outer casing or the inner casing of the spray head 7 can be controlled to rotate in a remote control manner, so that the spray head 7 is in an open state or a closed state. Of course, the spray head can be started or closed through a switch arranged on the pipe column device.
According to one embodiment of the invention, the sealing sliding sleeve of the sieve hole part can be controlled to slide along the axial direction in a remote control mode, so that the sieve hole part is in an open state or a closed state. Of course, the sliding sleeve can also be sealed in a sliding way through a sliding key arranged on the pipe column device.
The invention also provides a brine discharge capacity increasing system for the salt cavern gas storage, as shown in fig. 2 and 3, the system mainly comprises a gas injection pressurizing sleeve 8 and the pipe column device for the salt cavern gas storage, the pipe column device and the gas injection pressurizing sleeve 8 are respectively communicated with the salt cavern gas storage, the pipe column device is configured to spray liquid and liquid for melting salt mine to the salt cavern gas storage, and the gas injection pressurizing sleeve 8 is configured to inject gas to the salt cavern gas storage so as to increase the gas pressure in the salt cavern gas storage.
The invention also provides a method for halogen-discharging and capacity-increasing of a gas storage, which comprises the following steps: the method comprises the steps of respectively communicating a pipe column device and a gas injection pressurizing sleeve with a salt cavern gas storage, injecting liquid into the pipe column device to enable the pipe column device to advance to the bottom of the salt cavern gas storage in an injection mode, melting salt ores of the salt cavern gas storage through the liquid injected by the pipe column device, injecting gas into the salt cavern gas storage through the gas injection pressurizing sleeve after the salt ores are melted to increase the gas pressure in the salt cavern gas storage, and sucking the melted liquid through the pipe column device to drain the liquid, so that the purposes of discharging brine and increasing the volume of the gas storage are achieved.
The invention can lead the pipe column device to enter deeper sediments in a jet mode, thereby removing more water, further effectively increasing the storage space, namely increasing the volume of the gas storage, realizing the expansion and having great significance for the construction of the salt cavern gas storage.
Example 1
As shown in fig. 2 and 3, a jet pipe column device suitable for gas storage mainly comprises a jet casing 4, a sand control screen 5, a sealing sliding sleeve 6 and a hydraulic nozzle 7 with a closed performance, wherein the sealing sliding sleeve 6 is used for opening and closing the sand control screen 5. The pipe column device can be lowered into the insoluble matter layer 3 in the salt cavern gas storage by a hydraulic jetting mode. After the jet sleeve 4 is stable and does not descend any more, the gas injection pressurization mode is carried out through another well, redundant brine in the salt cavern gas storage cavity is discharged, and the problem that the volume of the cavity is reduced due to excessive water can be effectively solved.
In the process, a double well (one is used for putting the tubular column device underground, and the other is used for inserting the gas injection pressurizing casing pipe 8) is used for building a cavity, wherein:
a fluidic sleeve 4 to provide a fluid flow area for the hydrojet;
the sand control screen pipe 5 is arranged on the wall of the jet flow sleeve pipe 4, the sealing sliding sleeve 6 is used for opening and closing the sand control screen pipe 5, the sealing sliding sleeve 6 can be controlled to slide up and down in an electric signal transmission mode, when the sealing sliding sleeve 6 and the sand control screen pipe 5 are at the same horizontal position, water flow cannot flow in a communicating mode due to the obstruction of the sealing sliding sleeve on the inner side and the outer side of the pipe wall, the jet flow sleeve pipe 4 is in a sealing closed state, and the water flow can only flow along the inner part of the pipe wall; when the sealing sliding sleeve 6 slides upwards (or downwards), the separation of the inner side and the outer side of the pipe wall is eliminated, and the sand control screen pipe 5 arranged on the casing pipe wall enables water to flow to the inner side and the outer side of the jet casing pipe and simultaneously carries out sand control treatment;
the outer side of the hydraulic nozzle is covered by a rotatable four-hole sealing shell, the sealing characteristic is realized in a rotating mode, the rotating mode can be controlled and operated in a real-time mode in an electric signal transmission mode, when the sealing shell of the hydraulic nozzle is at 0 degree, the sealing shell blocks the jet holes of the hydraulic nozzle to achieve the sealing characteristic, and when the sealing shell rotates at 90 degrees, the four holes of the sealing shell are communicated with the four-hole hydraulic nozzle to achieve the jet characteristic.
And (3) performing casing running process technology, performing hydraulic injection on the tubular column device, opening the hydraulic spray head 7, closing the sealing sliding sleeve 6, performing hydraulic injection, putting the jet casing 4 into the insoluble substance layer 3 in the salt cavern gas storage, stopping hydraulic injection when the casing does not descend any more, and closing the hydraulic spray head 7.
Performing a gas injection pressurization brine discharge process technology, and according to the double-well cavity building principle, when the jet flow sleeve 4 is already sunk into the stratum insoluble substance layer 3, starting a gas injection pressurization engineering operation mode of preparing brine discharge by using a gas injection pressurization sleeve 8;
the hydraulic nozzle 7 is closed, the sealing sliding sleeve 6 is moved upwards (or downwards), the function of the sand control screen pipe 5 is started, the redundant water and the particles with smaller diameters in the cavity can flow along the jet flow sleeve 4 under the action of pressure and are discharged out of the cavity, the volume of the cavity is enlarged, and therefore more natural gas can be stored.
Example 2
In the dynamic settlement process of the piling method, the soil plug in the pile reaches a certain depth, so that the frictional resistance of the pile is increased, and the pile sinking efficiency is lowered. The water jet method can reduce the frictional resistance caused by the fact that the pile body enters the soil layer, disturb the soil body at the pile end, reduce the stratum strength and enable the pile to sink to the designed depth quickly. Because the jet power of high pressure water is very strong, various soil bodies can be loosened quickly, and general soil particles can be scattered by high pressure water flow except that large coarse sand and gravel are left at the bottom of a hole, so that a high-efficiency pile sinking process is realized. The following experimental data further demonstrate the effectiveness of the methods employed in the present invention.
TABLE 1 number of blows under different jet pressures
Tab.1 Hammering number under different jet pressures
Table 1: the hammering times of the pile sinking without jet flow from 0.35m to 0.95m are 263, while in the pile sinking process with jet flow assistance, when the pressure is 0.02MPa, the pile sinking process can be completed by about 186 hammering times, and when the pressure reaches 0.57MPa, only about 113 times are needed. Therefore, the pile sinking efficiency under the jet flow auxiliary pile sinking condition is greatly improved compared with the pile sinking efficiency without jet flow.
TABLE 2 number of hammering of jet flow at different flow rates
Tab.2 Hammering number under different iet flows
Table 2: the pile sinking is 0.60m to 0.95m, the hammering times are 199 times when the flow rate is 25L/min, and 113 times when the flow rate is 30L/min, and the difference is 86 times. The method is characterized in that the hammering number required for increasing the flow is less under the same conditions of simulating the stratum, a nozzle principle prototype and the like, and further, in the jet flow assisted pile sinking process, if the stratum is hard, the pile sinking efficiency can be improved by a method of increasing the jet flow.
From this data it can be analytically concluded that the method of hydrajetting will be easier to drive deep into the formation than piling.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.
It should be noted that, in this document, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
In addition, in the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The foregoing embodiments are merely illustrative of the present invention, and various components and devices of the embodiments may be changed or eliminated as desired, not all components shown in the drawings are necessarily required, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments described herein, and all equivalent changes and modifications based on the technical solutions of the present invention should not be excluded from the scope of the present invention.
Claims (8)
1. A pipe string device for a salt cavern gas storage, the pipe string device comprising:
a fluidic sleeve configured to be provided with a fluidic channel;
a spray head including a spray hole, the spray head being provided at a lower end of the jet sleeve, communicating with the jet passage, the spray head being configured to have two states of being opened and closed; the spray head further comprises an outer shell or an inner sleeve, wherein an outer hole is formed in the outer shell or an inner hole is formed in the inner sleeve, the outer shell or the inner sleeve is configured to rotate around the spray hole, the outer hole or the inner hole is communicated with the spray hole when the outer shell or the inner sleeve rotates to one state, and the outer shell or the inner sleeve shields the spray hole in other states;
the motor driving device is arranged at the upper end of the tubular column device, an output shaft of the motor driving device is connected with the outer shell or the inner sleeve, and the motor driving device drives the outer shell or the inner sleeve to rotate relative to the jet flow sleeve pipe when rotating, so that the shielding state or the communication state of the outer shell or the inner sleeve and the jet hole is realized;
the circuit control module is electrically connected with the motor driving device;
a sieve hole portion including a sieve hole provided in a casing wall of the jet casing, the sieve hole portion being configured to have both open and closed states, the sieve hole communicating the jet passage of the jet casing with the outside when the sieve hole portion is in the open state, the sieve hole interrupting communication of the jet passage of the jet casing with the outside when the sieve hole portion is in the closed state; when the sieve pore part is in a closed state and the spray head is in an open state, injecting liquid through the jet flow channel and spraying the liquid through the spray head so as to enable the spray head and the tubular column device to integrally move along the spraying direction; when the sieve pore part is in an open state and the spray head is in a closed state, the air pressure of the environment where the tubular column device is positioned is increased, so that the liquid outside the sieve pore part flows into the jet flow channel through the sieve pores and is discharged from the upper end of the jet flow channel;
the sieve hole part also comprises a sand control sieve tube and a sealing sliding sleeve, the sieve hole is arranged on the peripheral wall of the sand control sieve tube, the sealing sliding sleeve is arranged outside or inside the peripheral wall of the sand control sieve tube, and the sealing sliding sleeve is configured to slide along the axial direction relative to the sand control sieve tube;
the sand control screen pipe is a part of the jet flow casing pipe or is a separated piece with the jet flow casing pipe, and the sand control screen pipe is arranged between the upper section and the lower section of the jet flow casing pipe;
the electric control valve on the oil inlet pipe is controlled to be opened through the circuit control module, pressure liquid in the oil inlet pipe pushes the hydraulic piston to move downwards through the pressure liquid channel to drive the sealing sliding sleeve to slide downwards, or the electric control valve on the oil return pipe is controlled to be opened through the circuit control module, and pressure liquid flows back through the oil return pipeline to push the hydraulic piston to move upwards to drive the sealing sliding sleeve to slide upwards;
high-pressure liquid is injected in a liquid spraying mode, so that the high-pressure liquid impacts a deposition layer to form a hole body on the deposition layer, and the pipe column device sinks along the formed hole body to reach a deeper area, so that more liquid in the salt hole gas storage can be discharged through the pipe column device.
2. The pipe string device for a salt cavern gas storage as claimed in claim 1, wherein the injection holes are provided on the jet casing or on a separate piece connected to the jet casing.
3. The tubing string device for a salt cavern gas storage as claimed in claim 1, wherein the injection holes comprise a set of four holes; the sieve tube is a sintered filter screen sieve tube, and the filter layer of the sieve tube is composed of a sintered filter screen, so that the sand prevention particle size can be more than 0.1 mm.
4. A method of using the pipe string device for a salt cavern gas storage of any one of claims 1 to 3, the method comprising:
enabling the sieve pore part to be in a closed state, enabling the spray head to be in an open state, injecting liquid through the jet flow channel, and enabling the liquid to be sprayed out through the spray head, so that the spray head and the tubular column device move integrally along the spraying direction;
and enabling the sieve pore part to be in an open state, enabling the spray head to be in a closed state, and increasing the air pressure of the environment where the tubular column device is located, so that the liquid outside the sieve pore part flows into the jet flow channel through the sieve pores and is discharged from the upper end of the jet flow channel.
5. The method of using the pipe string apparatus for a salt cavern gas storage as claimed in claim 4, wherein the housing of the spray head is controlled to rotate in a remote manner to place the spray head in an open state or a closed state.
6. The method of using the pipe string device for the salt cavern gas storage as recited in claim 4, wherein the sealing slide of the sieve hole part is controlled to slide in the axial direction in a remote control manner so as to enable the sieve hole part to be in an open state or a closed state.
7. A system for brine discharge and capacity increase of a salt cavern gas storage, which comprises a gas injection pressurizing sleeve and the pipe column device for the salt cavern gas storage of any one of claims 1 to 3, wherein the pipe column device is communicated with the gas injection pressurizing sleeve and the salt cavern gas storage respectively, the pipe column device is configured to inject liquid and liquid for melting salt mine into the salt cavern gas storage, and the gas injection pressurizing sleeve is configured to inject gas into the salt cavern gas storage so as to increase the gas pressure in the salt cavern gas storage.
8. A method for discharging brine and increasing capacity of a gas storage, which is characterized by comprising the following steps: communicating the pipe column device for a salt cavern gas storage according to any one of claims 1 to 3 with a gas injection pressurizing sleeve, respectively, injecting a liquid into the pipe column device to make the pipe column device advance to the bottom of the salt cavern gas storage in an injection manner, melting salt ores in the salt cavern gas storage through the liquid injected from the pipe column device, injecting a gas into the salt cavern gas storage through the gas injection pressurizing sleeve after the salt ores are melted to increase the gas pressure in the salt cavern gas storage, and sucking the melted liquid through the pipe column device to discharge liquid, thereby discharging brine from the gas storage and increasing the volume of the gas storage.
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