CN115341876A - Gas reservoir development device and method - Google Patents
Gas reservoir development device and method Download PDFInfo
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- CN115341876A CN115341876A CN202110518582.2A CN202110518582A CN115341876A CN 115341876 A CN115341876 A CN 115341876A CN 202110518582 A CN202110518582 A CN 202110518582A CN 115341876 A CN115341876 A CN 115341876A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000009792 diffusion process Methods 0.000 claims abstract description 80
- 238000001179 sorption measurement Methods 0.000 claims abstract description 45
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 230000000903 blocking effect Effects 0.000 claims description 14
- 229920001971 elastomer Polymers 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 193
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
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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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/24—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing liquids, e.g. containing solids, or liquids and elastic fluids
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- Mechanical Engineering (AREA)
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Abstract
The application discloses a gas reservoir development device and method, and belongs to the field of gas reservoir development. The device includes negative pressure adsorption component and intake pipe, the intake pipe stretches into the first passageway in the negative pressure adsorption component, the gas-liquid mixture in the intake pipe is through first cavity, inlet channel and diffusion channel, and with the cooperation of the toper structure in the diffusion channel, near the tip formation that has the negative pressure region of this toper structure, so that the gas-liquid mixture in the hypotonic gas reservoir is under the adsorption of negative pressure, the inlet port on the outer wall through negative pressure adsorption component is inhaled the diffusion channel, and then passes through the diffusion channel with high-pressure gas together and collect and separate in the outside, can accelerate the exploitation speed of gas-liquid mixture in the hypotonic gas reservoir. The problem of low-permeability gas reservoir development efficiency is solved, and the effect of improving the development efficiency of the low-permeability gas reservoir is achieved.
Description
Technical Field
The application relates to the field of gas reservoir development, in particular to a gas reservoir development device and method.
Background
Gas reservoirs with effective permeability values less than 5 millidarcy (mD) are referred to as hypotonic gas reservoirs, i.e., gas reservoirs that are difficult to develop on an efficient scale by conventional mining methods. In China, most of gas reservoirs are low-permeability gas reservoirs, and the low-permeability gas reservoirs contain wide developable resources. Therefore, how to develop the low-permeability gas reservoir efficiently is very important.
At present, a low-permeability gas reservoir development device comprises a compressor, wherein the compressor is used for carrying out centralized pressurization or single-well pressurization on a gas well of the low-permeability gas reservoir, increasing the output pressure of a wellhead of the gas well, reducing the flowing pressure of the bottom of the well, further maintaining the gas production capacity of the gas well, and achieving the effects of increasing and stabilizing the yield of the low-permeability gas reservoir.
However, the reservoir pressure of the low-permeability gas reservoir can be released while the low-permeability gas well is pressurized in a centralized mode or a single well, when the well head pressure of the low-permeability gas well is lower than the pressure of the gathering and transportation system, the gathering and transportation system is difficult to work continuously, and the problems that the low-permeability gas well cannot be developed continuously and the development efficiency is low occur.
Disclosure of Invention
The embodiment of the application provides a gas reservoir development device and method. The technical scheme is as follows:
according to a first aspect of the present application, there is provided a gas reservoir development apparatus comprising: the negative pressure adsorption component and the air inlet pipe;
the negative pressure adsorption assembly comprises a columnar structure, and a first channel, a diffusion channel, an air inlet channel and a first cavity which are positioned in the columnar structure, wherein one end of the first channel is communicated with the outside of the negative pressure adsorption assembly, the other end of the first channel is communicated with the first cavity, one end of the air inlet channel is communicated with one end of the diffusion channel, and the other end of the air inlet channel is communicated with the first cavity; the other end of the diffusion channel is communicated with the first channel;
a tapered structure in the diffusion channel having an end facing the other end of the diffusion channel, the tapered structure separating the diffusion channels, the end of the tapered structure having an end opening;
an air inlet is formed in the outer wall of the columnar structure, the air inlet is communicated with the diffusion channel, and in the length direction of the diffusion channel, the air inlet is located on one side, close to the first chamber, of the end opening;
one end of the air inlet pipe is used for being connected with air supply equipment, and the other end of the air inlet pipe is used for extending into the first channel and communicated with the first cavity.
Optionally, the negative pressure adsorption assembly further comprises a joint located at the other end of the first channel, and the first channel is communicated with the first chamber through the joint;
the other end of the air inlet pipe is provided with a nozzle which is detachably connected with the joint.
Optionally, the joint comprises a tubular structure, a first spring, a first tubular sleeve, a second spring, a second tubular sleeve, and at least one set of fasteners, each set of fasteners comprising a first spherical fastener and a second spherical fastener;
the tubular structure is sleeved outside the first spring and the first tubular sleeve, one end of the inner wall of the tubular structure is provided with a reducing structure, one end of the first spring is abutted against the reducing structure, the other end of the first spring is abutted against one end of the first tubular sleeve, and the outer wall of the first tubular sleeve is provided with a first pit;
the second spring and the second tubular sleeve are sleeved outside the tubular structure, one end of the outer wall of the tubular structure is provided with a boss structure, one end of the second spring is abutted against the boss structure, the other end of the second spring is abutted against one end of the second tubular sleeve, the outer wall of the tubular structure is provided with at least one through hole group, each through hole group comprises a through hole and a conical hole, the opening with the larger diameter of the conical hole faces the direction far away from the first tubular sleeve, and the inner wall of the second tubular sleeve is provided with second pits which are in one-to-one correspondence with the through holes and the conical holes;
when the nozzle of the air inlet pipe is not connected with the joint, a second concave pit on the inner wall of the second tubular sleeve is opposite to the through hole on the tubular structure, the first spherical fixing piece is positioned in a space formed by one second concave pit on the inner wall of the second tubular sleeve and the through hole, and the second spherical fixing piece is positioned in a space formed by the other second concave pit on the inner wall of the second tubular sleeve and the conical hole;
the nozzle of intake pipe with under the state that connects, the nozzle will first tubulose external member promotes to preset position, first pit outside the first tubulose external member with the through-hole is relative, first spherical mounting is in the promotion of second tubulose external member falls into first pit with in the space that the through-hole formed, be provided with the stair structure on the nozzle, the spherical mounting of second is located the stair structure is kept away from one side of first tubulose external member.
Optionally, the joint includes a rubber packing cylinder located at one end of the first tubular sleeve far away from the first spring, and the nozzle of the air inlet pipe abuts against the rubber packing cylinder in a state that the nozzle is connected to the joint.
Optionally, the gas reservoir development device further comprises: the packer comprises two packers and two oil pipes, wherein one end of each oil pipe is connected with the other end of the first channel and the first cavity respectively, and the other ends of the two oil pipes are connected with the two packers respectively.
Optionally, the first channel is located at the center of the columnar structure, and the number of the diffusion channels and the number of the air inlet channels are both 2 and are arranged around the first channel.
Optionally, the diffusion channel further includes a diameter-reducing structure, in a length direction of the diffusion channel, the diameter of the diameter-reducing structure gradually increases in a direction extending from a first position to both sides, and the first position is located on a side, away from the first chamber, of an end of the conical structure.
Optionally, the gas reservoir development device further comprises a plugging ball;
one end of the first cavity, which is far away from the first channel, is provided with a cavity opening and a blocking ball seat which is positioned at the cavity opening, the first cavity is communicated with the oil pipe through the cavity opening, and the blocking ball is used for sitting on the blocking ball seat.
Optionally, the columnar structure further comprises an air outlet channel, the other end of the diffusion channel is connected with one end of the air outlet channel, and the other end of the air outlet channel is communicated with the first channel.
In another aspect, a gas reservoir development method is provided for collecting a gas-liquid mixture in a hypotonic gas reservoir corresponding to a hypotonic gas well by the above gas reservoir development device, and the method includes:
connecting one end of an air inlet pipe with air supply equipment;
extending the other end of the air inlet pipe into the first channel and communicating the other end of the air inlet pipe with the first cavity;
filling a first gas into the gas inlet pipe through the gas supply equipment;
collecting a mixture of the first gas and a gas-liquid mixture in the hypotonic gas reservoir through the first channel.
The beneficial effects that technical scheme that this application embodiment brought include at least:
the utility model provides a gas reservoir development device, the device includes negative pressure adsorption component and intake pipe, the intake pipe stretches into the first passageway in the negative pressure adsorption component, the gas-liquid mixture in the intake pipe is through first cavity, inlet channel and diffusion channel, and with the cooperation of the toper structure in the diffusion channel, near the tip of this toper structure formation has the region of negative pressure, so that the gas-liquid mixture in the hypotonic gas reservoir is under the adsorption of negative pressure, the inlet port on the outer wall through negative pressure adsorption component is inhaled the diffusion channel, and then collect and separate in the outside through the diffusion channel with high-pressure gas together, can accelerate the exploitation speed of gas-liquid mixture in the hypotonic gas reservoir. The problem of low-permeability gas reservoir development efficiency is solved, and the effect of improving the development efficiency of the low-permeability gas reservoir is achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a gas reservoir development device provided in an embodiment of the present application;
FIG. 2 is a schematic view of the gas reservoir apparatus of FIG. 1 with a nozzle not connected to the connector;
FIG. 3 is a schematic view of the gas reservoir development assembly of FIG. 1 with a nozzle connected to the adapter;
FIG. 4 is a schematic diagram of a gas reservoir exploitation device located below a hypotonic gas well according to an embodiment of the present disclosure;
fig. 5 is a flow chart of a method for gas reservoir development according to an embodiment of the present application.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. The drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the concepts of the application by those skilled in the art with reference to specific embodiments.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a gas reservoir development device provided in an embodiment of the present application, where the gas reservoir development device is used in a low-permeability gas well, and the low-permeability gas well includes a preset casing. The gas reservoir development device includes: negative pressure adsorption component 11 and air inlet pipe 12.
The negative pressure adsorption assembly 11 comprises a columnar structure 111, and a first channel 112, a diffusion channel 113, an air inlet channel 114 and a first chamber 115 which are positioned in the columnar structure 111, wherein one end of the first channel 112 is communicated with the outside of the negative pressure adsorption assembly 11, the other end of the first channel is communicated with the first chamber 115, one end of the air inlet channel 114 is communicated with one end of the diffusion channel 113, and the other end of the air inlet channel 114 is communicated with the first chamber 115; the other end of the diffusion passage 113 communicates with the first passage 112. As shown in fig. 1, the first passage 112 in the columnar structure 111 has one end communicating with the outside, one end communicating with the first chamber 115, and the first chamber 115 communicating with the gas inlet passage 114, and the gas inlet passage 114 communicating with the diffusion passage 113. The structure is such that gas can enter the first chamber 115 through the first passage 112, and then enter the diffusion passage 113 through the gas inlet passage 11 communicating with the first chamber 115.
The diffusion channel 113 has therein a tapered structure 1131 with an end facing the other end of the diffusion channel 113, the tapered structure 1131 partitioning the diffusion channel 113, the end of the tapered structure 1131 having an end opening 1131a. Here, the end of the tapered structure 1131 may refer to the end of the tapered structure 1131 with a smaller diameter, and the tapered structure 1131 functions to divide the diffusion channel 113, so that the gas ejected from the end of the tapered structure 1131 has a larger gas flow rate at the end opening 1131a, and the gas pressure near the end opening 1131a is reduced.
The outer wall of the columnar structure 111 is provided with an air inlet 1111, the air inlet 1111 is communicated with the diffusion channel 113, and in the length direction of the diffusion channel 113, the air inlet 1111 is positioned at one side of the end opening 1131a close to the first chamber 115. With such a structure, the air pressure inside the air inlet hole 1111 is lower than the air pressure outside the air inlet hole 1111, so that the air in the air reservoir can be sucked into the diffusion channel 113 through the air inlet hole 1111, and flows to the first channel 112 through the diffusion channel 113 to be collected.
The inlet pipe 12 has one end connected to the air supply device and the other end for extending into the first passage 112 and communicating with the first chamber 115. One end of the inlet pipe 12 may be connected to an external gas supply device which may supply high pressure gas (5-10 Mpa), and the other end of the inlet pipe 12 extends into the first passage 112. With such a structure, the high-pressure gas enters the first chamber 115 through the inlet pipe 12, sequentially passes through the inlet channel 114 and the tapered structure 1131, and is ejected out of the end opening 1131a of the tapered structure 1131. Since the diameter of the end opening 1131a is smaller than the other positions of the diffusion channel 113, when the high-pressure gas is ejected from the end opening 1131a, the gas pressure and the flow rate are both large, so that the gas pressure near the end opening 1131a is rapidly reduced to form a negative pressure region, and the gas in the gas reservoir is sucked into the diffusion channel 113 through the gas inlet under the action of negative pressure adsorption, and flows out from the diffusion channel 113 to the first channel 112 together with the high-pressure gas.
To sum up, the embodiment of the application provides a gas reservoir development device, the device includes negative pressure adsorption component and intake pipe, the intake pipe stretches into the first passageway in the negative pressure adsorption component, the gaseous through first cavity in the intake pipe, inlet channel and diffusion channel, and with the cooperation of the toper structure in the diffusion channel, near the tip that forms in this toper structure has the region of negative pressure, so that the gaseous adsorption of hypotonic gas reservoir under the negative pressure, the inlet port on the outer wall through negative pressure adsorption component is inhaled the diffusion channel, and then collect and separate in the outside through the diffusion channel with high-pressure gas together, can accelerate the exploitation speed of gaseous in the hypotonic gas reservoir. The problem of low-permeability gas reservoir development efficiency is solved, and the effect of improving the development efficiency of the low-permeability gas reservoir is achieved.
Optionally, the negative pressure adsorption assembly 11 further comprises a joint 116 at the other end of the first passage 112, the first passage 112 is communicated with the first chamber 115 through the joint 116, and the other end of the air inlet pipe 12 has a nozzle 121 for detachable connection with the joint 116. Referring to fig. 1, one end of the gas inlet pipe 12 is connected to an external pipeline for providing high-pressure gas, the other end extends into the first passage 112, and the other end has a nozzle 121, and the high-pressure gas enters the joint 116 through the nozzle 121 and then enters the first chamber 115. Meanwhile, the joint 116 is detachably connected with the nozzle 121 to fix the air inlet pipe 12, so that the air inlet pipe 12 cannot fall off due to the ejection of high-pressure gas during operation, and the normal operation of the air inlet pipe 12 is ensured.
Referring to fig. 2, fig. 2 is a schematic structural diagram of the gas reservoir exploitation apparatus shown in fig. 1 in a state where a nozzle is not connected to a joint.
Optionally, the joint includes a tubular structure 1161, a first spring 1162, a first tubular kit 1163, a second spring 1164, a second tubular kit 1165, and at least one set of fasteners 1166, each set of fasteners 1166 including a first ball fastener 1166a and a second ball fastener 1166b. The joint 116 is detachably connected to the air inlet pipe 12, and is used for fixing the air inlet pipe 12 in the first passage 112, so that the air inlet pipe 12 cannot be separated from the first passage 112 due to excessive pressure when high-pressure gas is flushed into the negative pressure adsorption assembly 11.
The tubular structure 1161 is sleeved outside the first spring 1162 and the first tubular sleeve 1163, one end (the end close to the first cavity 115) of the inner wall of the tubular structure 1161 is provided with a reducing structure 1161a, one end of the first spring 1162 abuts against the reducing structure 1161a, the other end of the first spring 1162 abuts against one end of the first tubular sleeve 1163, and the outer wall of the first tubular sleeve 1163 is provided with a first concave pit 1163a.
The second spring 1164 and the second tubular sleeve 1165 are sleeved outside the tubular structure 1161, one end (the end close to the first cavity 115) of the outer wall of the tubular structure 1161 has a boss structure 1161b, one end of the second spring 1164 abuts against the boss structure 1161b, the other end abuts against one end of the second tubular sleeve 1165, the outer wall of the tubular structure 1161 is provided with at least one through hole group 11611, each through hole group 11611 includes a through hole 11611a and a tapered hole 11611b, an opening of the tapered hole 11611b with a larger diameter faces a direction away from the first tubular sleeve 1163 (i.e., a direction away from an axis of the tubular structure 1161), and the inner wall of the second tubular sleeve 1165 has second recesses 1165a corresponding to the through holes 11611a and the tapered holes 11611b one to one. With such a structure, a receiving space is formed between the second recess 1165a and the corresponding through hole 11611a and tapered hole 11611 b.
As shown in fig. 2, in a state that the nozzle 121 of the air inlet pipe 12 is not connected to the joint 116, the second recess 1165a on the inner wall of the second tubular sleeve 1165 is opposite to the through hole 11611a on the tubular structure 1161, the first spherical fixing piece 1166a is located in a space formed by one second recess 1165a and the through hole 11611a on the inner wall of the second tubular sleeve 1165, and the second spherical fixing piece 1166b is located in a space formed by the other second recess 11665a and the tapered hole 11611b on the inner wall of the second tubular sleeve 1165. At this time, since the first ball fixing piece 1166a is located in the space formed by the second recess 1165a and the through hole 11611a, and the second ball fixing piece 1166b is located in the space formed by the other second recess 1165a and the tapered hole 11611b, the first ball fixing piece 1166a and the second ball fixing piece 1166b provide a constraint force for limiting the movement of the second tubular sleeve piece 1165 to the second tubular sleeve piece 1165, and under the constraint force, the second spring 1164 abutting against the second tubular sleeve piece 1165 is in a compressed state.
Fig. 3 is a schematic structural diagram of a state in which a nozzle and a joint are connected in the gas reservoir exploitation apparatus shown in fig. 1, as shown in fig. 3, in the state in which the nozzle 121 of the gas inlet pipe is connected to the joint 116, the nozzle 121 pushes the first tubular sleeve 1163 (i.e., the nozzle 121 extends into the joint 116, abuts against the first tubular sleeve 1163 and moves along the direction in which the nozzle 121 extends) to a preset position, a first recess 1163a outside the first tubular sleeve 1163 is opposite to the through hole 11611a, the first spherical fixing member 1166a falls into a space formed by the first recess 1163a and the through hole 11611a under the pushing of the second tubular sleeve 1165, the nozzle 121 is provided with a step structure 121a, and the second spherical fixing member 1166b is located on a side of the step structure 121a away from the first tubular sleeve 1163.
That is, the first spherical fixing piece 1166a originally located in the space formed by the second recess 1165a and the through hole 11611a is pushed by the second tubular kit 1165 to be separated from the second recess 1165a and moved into the first recess 1163a, and meanwhile, the second spherical fixing piece 1166b originally located in the space formed by the other second recess 11665a and the tapered hole 11611b is pushed by the second tubular kit 1165 to be separated from the other second recess 11665a and moved to the step structure 121a, and the step structure 121a is clamped by the second spherical fixing piece 1166b, so that the nozzle 121 is difficult to move. At this time, the second tubular sleeve 1165 naturally rebounds under the action of the second spring 1164, since the first and second ball fixtures 1166a and 1166b no longer give the second tubular sleeve 1165a restraining force that limits its movement. At the same time, the first spring 1162 is under pressure of the first tubular sleeve 1163, in a compressed state. With such a structure, when the air inlet pipe 12 extends into the joint 116, the position of the first spherical fixing piece 1166a and the position of the second spherical fixing piece 1166b are changed to fixedly connect the nozzle 121 of the air inlet pipe 12 with the joint 116, so that when the air inlet pipe 12 works, high-pressure gas ejected from the air inlet pipe 12 can enter the air inlet passage 114 through the joint 116 and the first cavity 115, and does not fall off due to acting force caused by the high-pressure gas ejected from the air inlet pipe 12 itself.
When the connection between the nozzle 121 and the joint 116 is released, the air tube 12 is lifted up, and with the movement of the second tubular sleeve 1165 and the rebound of the second spring 1164, the first ball-shaped fixture 1166a returns under pressure to the space formed by the second recess 1165a and the through hole 11611a, and the second ball-shaped fixture 1166b also returns to the space formed by the other second recess 11665a and the tapered hole 11611b, and at the same time, the second spring 1164 abutting against the second tubular sleeve 1165 is in a compressed state again.
Optionally, the joint 116 includes a sealing rubber tube 1167 located at an end of the first tubular sleeve 1163 away from the first spring 1162, and in a state where the nozzle 121 of the air inlet pipe 12 is connected to the joint 116, the nozzle 121 abuts against the sealing rubber tube 1167 to form a seal, so as to prevent the gas ejected from the nozzle 121 from directly leaking into the first passage. As shown in fig. 2, the sealing rubber tube 1167 abuts against the first tubular sleeve 1163 through the slot structure, and the sealing rubber tube 1167 has an inclined surface 1167a at an end away from the first tubular sleeve 1163, and the nozzle 121 has a tapered surface 121b corresponding to the inclined surface 1167a at an end facing the first tubular sleeve 1163, so that when the nozzle 121 is connected to the joint 116, the sealing rubber tube 1167 is pressed to drive the first tubular sleeve 1163 to go down, so as to change positions of the first spherical fixing piece 1166a and the second spherical fixing piece 1166b, thereby fixing the joint 116. Meanwhile, in the process that the nozzle 121 presses against the sealant barrel 1167, the nozzle 121 is tightly attached to the sealant barrel 1167 through the inclined surface 1167a and the conical surface 121b to achieve sealing, so that when the air inlet pipe 12 injects air through the nozzle 121, high-pressure air enters the first chamber 115 and the air inlet passage 114 through the joint 116, and thus the working efficiency of the air inlet pipe 12 is improved.
Optionally, fig. 4 is a schematic structural diagram of a gas reservoir development device located under a hypotonic gas well according to an embodiment of the present application, please refer to fig. 4, the gas reservoir development device further includes: two packers 13 and two sections of oil pipes 14, wherein one end of each section of oil pipe 14 is respectively connected with the other end of the first channel 112 and the first chamber 115, and the other ends of the two sections of oil pipes 14 are respectively connected with the two packers 13. Wherein, a casing C1 is arranged in the low-permeability gas well, and two packers 13 are used for sealing an annular space formed between the negative pressure adsorption component 11 and the casing C1 under the low-permeability gas well. With the structure, the working section of the negative pressure adsorption component 11 under the low-permeability gas well is separated from other working sections through the two packers 13, so that when the high-pressure gas is sprayed out of the gas inlet pipe 12, the high-pressure gas circularly flows in the working section of the negative pressure adsorption component 11 under the low-permeability gas well, and is difficult to enter other working sections, and the working efficiency of the gas reservoir development device is ensured.
Wherein, two packers 13 comprise tubular rubber, and the packers and the casing pipe are tightly contacted through the expansion of the tubular rubber to realize sealing. Alternatively, the material of the cylindrical rubber can be hydrogenated nitrile rubber, which has strong corrosion resistance and permeability resistance and can bear certain pressure and temperature. Therefore, in a low-permeability gas well, the packer made of the hydrogenated nitrile rubber can be in a stress balance state for a long time, the underground safe service life is long, and the service life of the gas reservoir development device provided by the embodiment of the application is further prolonged.
As shown in fig. 4, a low permeability gas well includes a casing C1, and a gas reservoir zone has a formation fracture C2 (i.e., a gas reservoir zone containing a gas reservoir), and gas in the gas reservoir can escape through the formation fracture C2. Meanwhile, the casing C1 has a perforation C1a at a position corresponding to the formation fracture C2, and gas overflowing from the formation fracture C2 can enter the casing C1 through the perforation C1 a.
As shown in fig. 1 and 4, the air inlet pipe 12 extends into the negative pressure adsorption assembly 11 and is fed with high pressure air, the high pressure air is ejected through the nozzle 121 of the air inlet pipe 12, passes through the joint 116, the first chamber 115 and the air inlet channel 114, enters the diffusion channel 113, and is ejected from the end opening 1131a of the tapered structure 1131 in the diffusion channel 113, because the diameter of the end opening 1131a is smaller than that of other parts of the tapered structure 1131, and the pressure of the ejected air is higher, the flow rate of the air when the high pressure air is ejected from the end opening 1131a is also higher, so that the air pressure in the space near the end opening 1131a is reduced, and a negative pressure region is formed. Meanwhile, gas overflowing from the rock stratum fracture C2 enters the casing C1 through the perforation C1a under the action of negative pressure adsorption, is sucked into the diffusion channel 113 through the air inlet 1111 in the columnar structure 111 and flows to the outside through the diffusion channel 113 together with high-pressure gas, and the gas in the gas reservoir is collected and separated from the outside, so that the efficient development of the gas reservoir development device provided by the embodiment of the application is realized.
Wherein the high pressure gas may comprise nitrogen (chemical formula: N) 2 ) Nitrogen is a colorless and odorless gas, and has the characteristics of inactive chemical properties and high chemical stability. Therefore, after the nitrogen and the gas in the gas reservoir are mixed, the nitrogen and the gas in the gas reservoir are difficult to react, and convenience is provided for the subsequent separation of the mixed gas of the nitrogen and the gas in the gas reservoir.
Alternatively, the first channel 112 is located at the center of the columnar structure 111, and the number of the diffusion channels 113 and the air inlet channels 114 is 2, and the diffusion channels and the air inlet channels are arranged around the first channel 112. As shown in fig. 1, the gas reservoir developing device provided in the embodiment of the present application includes two gas inlet channels 114 and two diffusion channels 113, and the gas inlet channels 114 and the diffusion channels 113 are arranged along the radial direction of the columnar structure 111. With the structure, high-pressure gas sprayed out through the air inlet pipe 12 can enter through the double air inlet channels 114 and flow out together with gas in the gas reservoir through the double diffusion channels 113, so that more gas reservoir resources can be developed simultaneously, and the inconvenience of putting the device into a well for multiple times is avoided.
Optionally, as shown in fig. 1, the diffusion channel 113 further includes a reducing structure 1132, in a length direction of the diffusion channel 113, the inner diameter of the reducing structure 1132 gradually increases in a direction extending to both sides at a first position a, where the first position a is located at a side of an end of the tapered structure 1131 away from the first chamber 115. Such a structure, the one end internal diameter of necking structure 1132 is less, make the tip opening 1131a spun high-pressure gas through conical structure 1131 still keep the higher and gas velocity of flow state of atmospheric pressure at necking structure 1132's one end, it forms the negative pressure zone in the vicinity of tip opening 1131a more easily, easily inhale negative pressure adsorption component 11 with the gas in the gas reservoir, and simultaneously, necking structure 1132 is in the direction that first position A extends to both sides, the internal diameter is crescent gradually, make the gas and the spun high-pressure gas that are inhaled in negative pressure adsorption component 11's the gas reservoir have great diffusion space, it flows to the outside to follow diffusion channel 113 more easily, collect and separate.
Optionally, as shown in fig. 1, the gas reservoir exploitation device further comprises a blocking ball 15, an end of the first chamber 115 remote from the first channel 112 is provided with a chamber opening 1151 and a blocking ball seat 1152 located at the chamber opening 1151, the first chamber 115 is communicated with the oil pipe 14 through the chamber opening 1151, and the blocking ball 15 is configured to sit on the blocking ball seat 1152. And the blocking ball seat 1152 is coupled to the chamber opening 1151, which may be a threaded connection. Meanwhile, the blocking ball seat 1152 has a seat opening 1152a, and the blocking ball 15 may be seated on the seat opening 1152a and limit gas exchange between the first chamber 115 and the oil pipe 14, implementing a sealing. With such a structure, when the air inlet pipe 12 fills the high-pressure gas into the negative pressure adsorption assembly 11, the first chamber 115 is not communicated with the oil pipe 14, so that the high-pressure gas can flow to the air inlet passage 114 through the first chamber 115, and then the gas in the gas reservoir is adsorbed through the diffusion passage 113. If the first chamber 115 is communicated with the oil pipe 14, there is a certain gas exchange between the first chamber 115 and the oil pipe 14, the gas pressure of the high-pressure gas ejected from the gas inlet pipe 12 may decrease in the first chamber, and when the gas with the decreased gas pressure passes through the end opening 1131a of the tapered structure 1131, the gas flow rate may be slow, the pressure is low, and therefore the negative pressure adsorption efficiency on the gas in the gas reservoir is low.
Optionally, the columnar structure 111 further includes an air outlet channel 1117, the other end of the diffusion channel 113 is connected to one end of the air outlet channel 1117, and the other end of the air outlet channel 1117 is communicated with the first channel 112. As shown in fig. 1, the columnar structure 111 of the gas reservoir developing device provided in the embodiment of the present invention includes two gas outlet channels 1117, and the high-pressure gas ejected from the gas inlet tube 12 flows through the first chamber 115 and the gas inlet channel 114 to the diffusion channel 113, and then flows through the gas outlet channels 1117 to the first channel 112 together with the adsorbed gas in the gas reservoir to be collected outside.
Optionally, the air inlet pipe 12 comprises a nozzle 121, a safety joint 122 and a coiled tubing 603 connected in sequence. When the gas in the gas reservoir has been fully recovered, the gas inlet pipe 12 is lifted up, the safety joint 122 is disengaged from the nozzle 121, and the safety joint 122 and the coiled tubing 123 are lifted up. With such a structure, the disassembly process of the air inlet pipe 12 is simple and convenient.
To sum up, the embodiment of the application provides a gas reservoir development device, the device includes negative pressure adsorption component and intake pipe, the intake pipe stretches into the first passageway in the negative pressure adsorption component, gaseous through first cavity in the intake pipe, inlet channel and diffusion channel, and with the cooperation of the toper structure in the diffusion channel, near the tip that forms in this toper structure has the region of negative pressure, so that the gaseous adsorption of hypotonic gas reservoir under the negative pressure, the inlet port on the outer wall through negative pressure adsorption component is inhaled the diffusion channel, and then with high-pressure gas together through the diffusion channel in the outside collection and separation, can accelerate the exploitation speed of gaseous in the hypotonic gas reservoir. The problem of low-permeability gas reservoir development efficiency is solved, and the effect of improving the development efficiency of the low-permeability gas reservoir is achieved.
Fig. 5 is a flowchart of a gas reservoir development method according to an embodiment of the present application, which may be applied to the gas reservoir development apparatus provided in the foregoing embodiment, and the method includes the following steps:
and step 501, connecting one end of an air inlet pipe with air supply equipment.
And 502, extending the other end of the air inlet pipe into the first channel and communicating the other end of the air inlet pipe with the first cavity.
The other end of the air inlet pipe extends into the first channel, so that the air inlet pipe and a first cavity in the negative pressure adsorption assembly are in a communicated state.
And 503, filling the first gas into the gas inlet pipe through the gas supply device.
And starting the gas supply equipment, and filling first gas into the gas inlet pipe through one end of the gas inlet pipe. The first gas may be nitrogen. Among them, nitrogen is chemically stable and hardly reacts with other substances. The first gas enters the first chamber through the gas inlet pipe, then enters the diffusion channel through the gas inlet channel, and is sprayed out from the end opening of the conical structure in the diffusion pipeline.
When the first gas is sprayed out from the end opening, a negative pressure area is formed near the end opening due to the fact that the pressure and the flow rate of the first gas are large, so that the gas in the low-permeability gas reservoir is sucked into the negative pressure adsorption assembly under the action of pressure difference, flows out to the first channel along the diffusion pipeline together with the first gas, and is collected through the first channel.
To sum up, the gas reservoir development method that this application embodiment provided can be applied to among the gas reservoir development device, the device includes negative pressure adsorption component and intake pipe, the intake pipe stretches into the first passageway in the negative pressure adsorption component, the gaseous first cavity of process, inlet channel and diffusion channel in the intake pipe, and with the toper structure cooperation in the diffusion channel, near the tip that forms this toper structure has the region of negative pressure, so that the gaseous in the hypotonic gas reservoir under the adsorption of negative pressure, the inlet port on the outer wall through negative pressure adsorption component is inhaled the diffusion channel, and then is collected and is separated in the outside through the diffusion channel with high-pressure gas together, can accelerate the exploitation speed of gaseous in the hypotonic gas reservoir. The problem of low-permeability gas reservoir development efficiency is solved, and the effect of improving the development efficiency of the low-permeability gas reservoir is achieved.
In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
The present application is intended to cover various modifications, alternatives, and equivalents, which may be included within the spirit and scope of the present application.
Claims (10)
1. A gas reservoir development apparatus, comprising: the negative pressure adsorption component and the air inlet pipe;
the negative pressure adsorption assembly comprises a columnar structure, and a first channel, a diffusion channel, an air inlet channel and a first chamber which are positioned in the columnar structure, wherein one end of the first channel is communicated with the outside of the negative pressure adsorption assembly, the other end of the first channel is communicated with the first chamber, one end of the air inlet channel is communicated with one end of the diffusion channel, and the other end of the air inlet channel is communicated with the first chamber; the other end of the diffusion channel is communicated with the first channel;
a tapered structure in the diffusion channel having an end facing the other end of the diffusion channel, the tapered structure separating the diffusion channels, the end of the tapered structure having an end opening;
an air inlet is formed in the outer wall of the columnar structure, the air inlet is communicated with the diffusion channel, and in the length direction of the diffusion channel, the air inlet is located on one side, close to the first chamber, of the end opening;
one end of the air inlet pipe is used for being connected with air supply equipment, and the other end of the air inlet pipe is used for extending into the first channel and communicated with the first cavity.
2. The gas reservoir development device of claim 1, wherein the negative pressure adsorption assembly further comprises a fitting at the other end of the first passage, the first passage communicating with the first chamber through the fitting;
the other end of the air inlet pipe is provided with a nozzle which is detachably connected with the joint.
3. The gas reservoir development device of claim 2, wherein the joint comprises a tubular structure, a first spring, a first tubular sleeve, a second spring, a second tubular sleeve, and at least one set of fasteners, each set of fasteners comprising a first spherical fastener and a second spherical fastener;
the tubular structure is sleeved outside the first spring and the first tubular sleeve piece, one end of the inner wall of the tubular structure is provided with a reducing structure, one end of the first spring is abutted against the reducing structure, the other end of the first spring is abutted against one end of the first tubular sleeve piece, and the outer wall of the first tubular sleeve piece is provided with a first pit;
the second spring and the second tubular sleeve are sleeved outside the tubular structure, one end of the outer wall of the tubular structure is provided with a boss structure, one end of the second spring is abutted against the boss structure, the other end of the second spring is abutted against one end of the second tubular sleeve, the outer wall of the tubular structure is provided with at least one through hole group, each through hole group comprises a through hole and a conical hole, the opening with the larger diameter of the conical hole faces the direction far away from the first tubular sleeve, and the inner wall of the second tubular sleeve is provided with second pits which are in one-to-one correspondence with the through holes and the conical holes;
when the nozzle of the air inlet pipe is not connected with the joint, a second pit on the inner wall of the second tubular sleeve is opposite to the through hole on the tubular structure, the first spherical fixing piece is positioned in a space formed by one second pit on the inner wall of the second tubular sleeve and the through hole, and the second spherical fixing piece is positioned in a space formed by the other second pit on the inner wall of the second tubular sleeve and the conical hole;
the nozzle of intake pipe with under the state that connects, the nozzle will first tubulose external member promotes to preset position, first pit outside the first tubulose external member with the through-hole is relative, first spherical mounting is in the promotion of second tubulose external member falls into first pit with in the space that the through-hole formed, be provided with the stair structure on the nozzle, the spherical mounting of second is located the stair structure is kept away from one side of first tubulose external member.
4. The gas reservoir exploitation device of claim 3, wherein the joint comprises a sealing rubber cylinder located at an end of the first tubular sleeve remote from the first spring, and wherein the nozzle of the air inlet pipe abuts against the sealing rubber cylinder in a state in which the nozzle of the air inlet pipe is connected to the joint.
5. The gas reservoir development arrangement of claim 1, further comprising: the oil pipe comprises two packers and two sections of oil pipes, wherein one ends of the two sections of oil pipes are respectively connected with the other end of the first channel and the first cavity, and the other ends of the two sections of oil pipes are respectively connected with the two packers.
6. The gas reservoir development device of claim 1, wherein the first channel is located at the center of the columnar structure, and the number of the diffusion channels and the gas inlet channels is 2, and the diffusion channels and the gas inlet channels are arranged around the first channel.
7. The gas reservoir exploitation device of claim 1, further comprising a diameter reduction structure in the diffusion channel, wherein the diameter reduction structure has an increasing inner diameter along a direction extending from a first position to two sides of the diffusion channel, and the first position is located at a side of an end of the tapered structure away from the first chamber.
8. The gas reservoir development device of claim 5, further comprising a blocking ball;
one end of the first cavity, which is far away from the first channel, is provided with a cavity opening and a blocking ball seat which is positioned at the cavity opening, the first cavity is communicated with the oil pipe through the cavity opening, and the blocking ball is used for sitting on the blocking ball seat.
9. The gas reservoir exploitation device of any one of claims 1-8, wherein the columnar structure further comprises an outlet channel, and the other end of the diffusion channel is connected to one end of the outlet channel, and the other end of the outlet channel is in communication with the first channel.
10. A gas reservoir development method for collecting a gas-liquid mixture in a hypotonic gas reservoir corresponding to a hypotonic gas well by a gas reservoir development apparatus as claimed in any one of claims 1 to 9, the method comprising:
connecting one end of an air inlet pipe with air supply equipment;
extending the other end of the air inlet pipe into the first channel and communicating the other end of the air inlet pipe with the first cavity;
filling a first gas into the gas inlet pipe through the gas supply equipment;
collecting a mixture of the first gas and a gas-liquid mixture in the hypotonic gas reservoir through the first channel.
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| CN202110518582.2A CN115341876B (en) | 2021-05-12 | 2021-05-12 | Gas reservoir development device and method |
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| CN86103075A (en) * | 1986-05-01 | 1987-11-11 | 纽普罗有限公司 | Down hole reverse up flow jet pump |
| US20070187110A1 (en) * | 2003-08-14 | 2007-08-16 | Lima Goncalves Marcelo D A | Method and apparatus for production in oil wells |
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