CN115341876B - Gas reservoir development device and method - Google Patents
Gas reservoir development device and method Download PDFInfo
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- CN115341876B CN115341876B CN202110518582.2A CN202110518582A CN115341876B CN 115341876 B CN115341876 B CN 115341876B CN 202110518582 A CN202110518582 A CN 202110518582A CN 115341876 B CN115341876 B CN 115341876B
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- 238000011161 development Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000009792 diffusion process Methods 0.000 claims abstract description 81
- 238000001179 sorption measurement Methods 0.000 claims abstract description 44
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 15
- 238000012856 packing Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 192
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 230000035699 permeability Effects 0.000 description 9
- 229920001971 elastomer Polymers 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion 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
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The application discloses a gas reservoir development device and method, and belongs to the field of gas reservoir development. The device comprises a negative pressure adsorption component and an air inlet pipe, wherein the air inlet pipe stretches into a first channel in the negative pressure adsorption component, a gas-liquid mixture in the air inlet pipe passes through a first chamber, the air inlet channel and a diffusion channel and is matched with a conical structure in the diffusion channel, and a negative pressure area is formed near the end part of the conical structure, so that the gas-liquid mixture in a hypotonic gas reservoir is sucked into the diffusion channel through an air inlet hole on the outer wall of the negative pressure adsorption component under the adsorption action of the negative pressure, and then is collected and separated outside through the diffusion channel together with high-pressure gas, and the exploitation speed of the gas-liquid mixture in the hypotonic gas reservoir can be accelerated. The problem of low development efficiency of the low-permeability gas reservoir 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
A gas reservoir having an effective permeability value of less than 5 millidarcies (mD) is referred to as a hypotonic gas reservoir, i.e., a gas reservoir that is difficult to develop on an effective scale in conventional mining modes. In China, most gas reservoirs are low-permeability gas reservoirs, and the low-permeability gas reservoirs contain wide developable resources. Therefore, how to develop low permeability reservoirs with high efficiency is important.
At present, the development device of the low permeability gas reservoir comprises a compressor, wherein the compressor is used for carrying out concentrated pressurization or single-well pressurization on the gas well of the low permeability gas reservoir, so that the wellhead output pressure of the gas well is increased, the bottom hole flow pressure is reduced, the gas production capacity of the gas well is further maintained, and the effect of increasing and stabilizing the yield of the low permeability gas reservoir is achieved.
However, when the wellhead pressure of the hypotonic gas well is lower than the pressure of the gathering and transporting system, the gathering and transporting system is difficult to work continuously, and the problems that the hypotonic gas well cannot be developed continuously and has lower development efficiency occur.
Disclosure of Invention
The embodiment of the application provides a gas reservoir development device and a gas reservoir development 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: negative pressure adsorption component and air inlet pipe;
the negative pressure adsorption component comprises a columnar structure, a first channel, a diffusion channel, an air inlet channel and a first cavity, wherein the first channel, the diffusion channel, the air inlet channel and the first cavity are arranged in the columnar structure, one end of the first channel is communicated with the outside of the negative pressure adsorption component, 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;
the diffusion channel is provided with a conical structure with an end part facing the other end of the diffusion channel, the conical structure separates the diffusion channel, and the end part of the conical structure is provided with an end opening;
the outer wall of the columnar structure is provided with an air inlet hole, the air inlet hole is communicated with the diffusion channel, and in the length direction of the diffusion channel, the air inlet hole is positioned at one side of the end opening close to the first chamber;
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 communicating with the first cavity.
Optionally, the negative pressure adsorption assembly further comprises a joint 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 used for being 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 fixtures, each set of fixtures comprising a first spherical fixture and a second spherical fixture;
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 diameter-reducing structure, one end of the first spring is abutted with the diameter-reducing structure, the other end of the first spring is abutted with 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 larger diameter of the conical hole faces the direction away from the first tubular sleeve, and the inner wall of the second tubular sleeve is provided with second pits corresponding to the through holes and the conical holes one by one;
wherein, in a state that the nozzle of the air inlet pipe is not connected with the joint, the 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;
under the state that the nozzle of intake pipe with connect is connected, the nozzle will first tubular external member promotes to predetermineeing the position, first pit outside the first tubular external member with the through-hole is relative, first spherical mounting is in under the promotion of second tubular external member fall into first pit with in the space that the through-hole formed, be provided with step structure on the nozzle, the second spherical mounting is located step structure is kept away from one side of first tubular external member.
Optionally, the joint includes being located the first tubular sleeve spare is kept away from the packing element of the one end of first spring, the nozzle of intake pipe with the state of joint connection, the nozzle with the packing element butt.
Optionally, the gas reservoir development device further comprises: the two-section oil pipe is characterized by comprising two packers and two sections of oil pipes, wherein one end of each section of oil pipe is connected with the other end of the first channel and the first cavity respectively, and the other end of each section of oil pipe is 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 all 2, and are distributed around the first channel.
Optionally, the diffusion channel further includes a reducing structure, and in the length direction of the diffusion channel, the reducing structure gradually increases in inner diameter in a direction in which a first position extends to two sides, and the first position is located at a side of an end portion of the conical structure away from the first chamber.
Optionally, the gas reservoir development device further comprises a plugging ball;
the one end that first cavity kept away from first passageway is provided with the cavity opening and is located cavity open-ended shutoff ball seat, first cavity passes through cavity opening and oil pipe intercommunication, the shutoff ball is used for sitting on the shutoff ball seat.
Optionally, the columnar structure further includes 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.
On the other hand, a gas reservoir development method is provided, and is used for collecting gas-liquid mixtures in a low-permeability gas reservoir corresponding to a low-permeability gas well through the gas reservoir development device, and the method comprises the following steps:
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 with the first chamber;
filling first gas into the air inlet pipe through the gas supply equipment;
a mixture of the first gas and a gas-liquid mixture in the hypotonic gas reservoir is collected through the first passageway.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
the utility model provides a gas reservoir development device, this 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 cooperate with the toper structure in the diffusion channel, form near the tip of this toper structure and have the region of negative pressure, so that the gas-liquid mixture in the hypotonic gas reservoir is sucked the diffusion channel through the inlet port on the outer wall of negative pressure adsorption component under the adsorption of negative pressure, and then collect and separate in the outside through the diffusion channel together with high-pressure gas, can accelerate the exploitation speed of gas-liquid mixture in the hypotonic gas reservoir. The problem of low development efficiency of the low-permeability gas reservoir 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 of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a gas reservoir development device according to an embodiment of the present application;
FIG. 2 is a schematic view of the gas reservoir development apparatus of FIG. 1 in a state in which a nozzle is not connected to a joint;
FIG. 3 is a schematic view of the gas reservoir development apparatus of FIG. 1 in a state in which a nozzle is connected to a joint;
FIG. 4 is a schematic diagram of a gas reservoir development device according to an embodiment of the present application in a low permeability gas well;
fig. 5 is a flow chart of a gas reservoir development method according to an embodiment of the present application.
Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a gas reservoir development device according to an embodiment of the present application, which is used in a low permeability gas well including a preset casing. The gas reservoir development device includes: negative pressure suction unit 11 and intake 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, a first passage 112 in the columnar structure 111 communicates with the outside at one end, communicates with a first chamber 115 at one end, and communicates with an intake passage 114, and the intake passage 114 communicates with a diffusion passage 113. So configured, gas may enter the first chamber 115 through the first passage 112 and further 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 having an end toward the other end of the diffusion channel 113, the tapered structure 1131 separating the diffusion channel 113, the end of the tapered structure 1131 having an end opening 1131a. The end of the tapered structure 1131 may be referred to as the end of the tapered structure 1131 with a smaller diameter, and the tapered structure 1131 serves to divide the diffusion channel 113, such that the gas ejected through the end of the tapered structure 1131 has a larger flow velocity 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 hole 1111, the air inlet hole 1111 communicates with the diffusion channel 113, and in the length direction of the diffusion channel 113, the air inlet hole 1111 is located at a side of the end opening 1131a close to the first chamber 115. With this structure, the air pressure inside the air intake hole 1111 is lower than the air pressure outside the air intake hole 1111, so that the air in the air reservoir can be sucked into the diffusion passage 113 through the air intake hole 1111 and flow to the first passage 112 through the diffusion passage 113 to be collected.
One end of the air inlet pipe 12 is connected to the air supply device and the other end is adapted to extend into the first passage 112 and communicate with the first chamber 115. One end of the intake 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 intake pipe 12 extends into the first passage 112. With this structure, the high pressure gas enters the first chamber 115 through the gas inlet pipe 12, passes through the gas inlet channel 114 and the tapered structure 1131 in sequence, and is ejected from 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 velocity are both larger, so that the gas pressure near the end opening 1131a is rapidly reduced, a negative pressure region is formed, 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.
In summary, the embodiment of the application provides a gas reservoir development device, which includes a negative pressure adsorption assembly and a gas inlet pipe, wherein the gas inlet pipe extends into a first channel in the negative pressure adsorption assembly, gas in the gas inlet pipe passes through a first chamber, the gas inlet channel and a diffusion channel and is matched with a conical structure in the diffusion channel, and a negative pressure area is formed near the end part of the conical structure, so that gas in a low-permeability gas reservoir is sucked into the diffusion channel through a gas inlet hole on the outer wall of the negative pressure adsorption assembly under the adsorption effect of the negative pressure, and then is collected and separated outside together with high-pressure gas through the diffusion channel, so that the exploitation speed of the gas in the low-permeability gas reservoir can be accelerated. The problem of low development efficiency of the low-permeability gas reservoir 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 includes a joint 116 at the other end of the first passage 112, the first passage 112 communicates with the first chamber 115 through the joint 116, and the other end of the air intake pipe 12 has a nozzle 121 for detachable connection with the joint 116. Referring to fig. 1, one end of the air inlet pipe 12 is connected to an external pipeline for providing high pressure air, the other end extends into the first channel 112, and the other end has a nozzle 121, and the high pressure air enters the joint 116 through the nozzle 121 and further enters the first chamber 115. Meanwhile, the connector 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 high-pressure gas spraying during operation, and normal operation of the air inlet pipe 12 is ensured.
Referring to fig. 2, fig. 2 is a schematic view of a structure of a gas reservoir development apparatus shown in fig. 1 in a state in which a nozzle is not connected to a joint.
Optionally, the joint includes a tubular structure 1161, a first spring 1162, a first tubular sleeve 1163, a second spring 1164, a second tubular sleeve 1165, and at least one set of fixtures 1166, each set of fixtures 1166 including a first spherical fixture 1166a and a second spherical fixture 1166b. The connector 116 is detachably connected to the air inlet pipe 12, and is used for fixing the air inlet pipe 12 in the first channel 112, so that the air inlet pipe 12 cannot be separated from the first channel 112 due to excessive pressure when high-pressure air is injected 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 diameter-reducing structure 1161a, one end of the first spring 1162 is abutted with the diameter-reducing structure 1161a, the other end is abutted with one end of the first tubular sleeve 1163, and a first pit 1163a is arranged on the outer wall of the first tubular sleeve 1163.
The second spring 1164 and the second tubular sleeve 1165 are sleeved outside the tubular structure 1161, one end of the outer wall of the tubular structure 1161 (the end close to the first cavity 115) is provided with a boss structure 1161b, one end of the second spring 1164 is abutted against the boss structure 1161b, the other end of the second spring 1164 is abutted against one end of the second tubular sleeve 1165, at least one through hole set 11611 is arranged on the outer wall of the tubular structure 1161, each through hole set 11611 comprises a through hole 11611a and a conical hole 11611b, an opening with a larger diameter of the conical hole 11611b faces away from the direction of the first tubular sleeve 1163 (namely, the direction away from the axis of the tubular structure 1161), and a second pit 1165a corresponding to the through hole 11611a and the conical hole 11611b is formed in the inner wall of the second tubular sleeve 1165. With this structure, a space is formed between the second recess 1165a and the corresponding through hole 11611a and tapered hole 11611 b.
Wherein, as shown in fig. 2, in a state that the nozzle 121 of the air inlet pipe 12 is not connected with the joint 116, the second concave pit 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 positioned in a space formed by one second concave pit 1165a on the inner wall of the second tubular sleeve 1165 and the through hole 11611a, and the second spherical fixing piece 1166b is positioned in a space formed by the other second concave pit 11665a on the inner wall of the second tubular sleeve 1165 and the tapered hole 11611 b. At this time, since the first spherical fixing member 1166a is located in the space formed by the second concave recess 1165a and the through hole 11611a and the second spherical fixing member 1166b is located in the space formed by the other second concave recess 1165a and the tapered hole 11611b, the first spherical fixing member 1166a and the second spherical fixing member 1166b provide the second tubular member 1165 with a restraining force to restrain the movement of the second tubular member 1165, under which the second spring 1164 abutting against the second tubular member 1165 is in a compressed state.
Fig. 3 is a schematic structural view of the gas reservoir development device shown in fig. 1 in a state that a nozzle is connected to a joint, as shown in fig. 3, in a state that a nozzle 121 of an air inlet pipe is connected to a joint 116, the nozzle 121 pushes a first tubular member 1163 (that is, the nozzle 121 extends into the joint 116 and abuts against the first tubular member 1163 and moves along a direction in which the nozzle 121 extends) to a preset position, a first pit 1163a outside the first tubular member 1163 is opposite to a through hole 11611a, a first spherical fixing piece 1166a falls into a space formed by the first pit 1163a and the through hole 11611a under the pushing of a second tubular member 1165, a step structure 121a is arranged on the nozzle 121, and the second spherical fixing piece 1166b is located on a side of the step structure 121a away from the first tubular member 1163.
Namely, the first spherical fixing member 1166a originally located in the space formed by the second concave recess 1165a and the through hole 11611a is removed from the second concave recess 1165a and moved into the first concave recess 1163a by the pushing action of the second tubular member 1165, and at the same time, the second spherical fixing member 1166b originally located in the space formed by the other second concave recess 11665a and the tapered hole 11611b is removed from the other second concave recess 11665a and moved to the step structure 121a by the pushing action of the second tubular member 1165, and the second spherical fixing member 1166b catches the step structure 121a, thereby making it difficult for the nozzle 121 to move. At this time, since the first and second spherical fixtures 1166a and 1166b no longer give the restraining force to the second tubular member 1165 to restrict its movement, the second tubular member 1165 naturally rebounds under the action of the second spring 1164. At the same time, the first spring 1162 is in a compressed state under the pressure of the first tubular sleeve 1163. With this structure, when the air inlet pipe 12 extends into the joint 116, the positions of the first spherical fixing piece 1166a and the second spherical fixing piece 1166b are changed, so that the nozzle 121 of the air inlet pipe 12 is fixedly connected with the joint 116, and when the air inlet pipe 12 works, high-pressure air sprayed by the air inlet pipe 12 can enter the air inlet channel 114 through the joint 116 and the first cavity 115, and the high-pressure air does not fall off due to acting force caused by high-pressure air sprayed by the air inlet pipe 12.
When the connection of the nozzle 121 to the joint 116 is released, the air inlet pipe 12 is lifted up, and as the second tubular member 1165 moves and the second spring 1164 rebounds, the first spherical fixing member 1166a returns to the space formed by the second concave recess 1165a and the through hole 11611a under pressure, and the second spherical fixing member 1166b also returns to the space formed by the other second concave recess 11665a and the tapered hole 11611b, and at the same time, the second spring 1164 abutting against the second tubular member 1165 is in a compressed state again.
Optionally, the joint 116 includes a sealing rubber 1167 located at an end of the first tubular sleeve 1163 far away from the first spring 1162, and in a state that the nozzle 121 of the air inlet pipe 12 is connected to the joint 116, the nozzle 121 abuts against the sealing rubber 1167 to form a seal, so that gas sprayed from the nozzle 121 is prevented from leaking into the first channel directly. As shown in fig. 2, the sealing glue barrel 1167 is abutted with the first tubular sleeve 1163 through a slot structure, one end of the sealing glue barrel 1167 far away from the first tubular sleeve 1163 is provided with an inclined surface 1167a, one end of the nozzle 121 facing the first tubular sleeve 1163 is provided with a conical surface 121b corresponding to the inclined surface 1167a, and when the nozzle 121 is connected with the joint 116, the sealing glue barrel 1167 is abutted to drive the first tubular sleeve 1163 to move downwards, so that the positions of the first spherical fixing piece 1166a and the second spherical fixing piece 1166b are changed, and the fixing with the joint 116 is achieved. Meanwhile, in the process of pressing the sealing rubber cylinder 1167, the nozzle 121 is tightly attached to the sealing rubber cylinder 1167 through the inclined surface 1167a and the conical surface 121b, sealing is achieved, and when the air inlet pipe 12 is sprayed through the nozzle 121, high-pressure air enters the first cavity 115 and the air inlet channel 114 through the connector 116, so that 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 according to an embodiment of the present application, where the gas reservoir development device is located in a low permeability gas well, and referring to fig. 4, the gas reservoir development device further includes: two packers 13 and two sections of oil pipes 14, one end of each of the two sections of oil pipes 14 is connected with the other end of the first channel 112 and the first cavity 115, and the other end of each of the two sections of oil pipes 14 is connected with the two packers 13. Wherein, the casing C1 is arranged in the hypotonic gas well, and two packers 13 are used for sealing an annular space formed between the hypotonic gas well and the casing C1 by the negative pressure adsorption assembly 11. In such a structure, the working section of the negative pressure adsorption component 11 under the low-permeability gas well is separated from other working sections by the two packers 13, so that when the air inlet pipe 12 ejects high-pressure gas, the high-pressure gas circulates in the working section of the negative pressure adsorption component 11 under the low-permeability gas well, and is difficult to enter the other working sections, and the working efficiency of the gas reservoir development device is ensured.
Wherein, two packers 13 comprise tubular rubber, and the sealing is realized by the expansion of the tubular rubber to enable the packers to be in close contact with the casing. Alternatively, the material of the barrel rubber may be hydrogenated nitrile rubber, which has a high resistance to corrosion and permeation and is capable of withstanding a certain pressure and temperature. Therefore, in a low permeability gas well, the packer made of hydrogenated nitrile rubber can be in a stress balance state for a long time, and the underground safety service life is longer, so that the service life of the gas reservoir development device provided by the embodiment of the application is further prolonged.
As shown in fig. 4, the hypotonic gas well includes a preset casing C1, and a formation fracture C2 is provided in a gas reservoir producing layer (i.e., a gas-bearing layer containing a gas reservoir), and gas in the gas reservoir may escape through the formation fracture C2. Meanwhile, the casing C1 has perforations C1a at positions corresponding to the formation fracture C2, and gas overflowing in the formation fracture C2 may enter the casing C1 through the perforations C1 a.
As shown in fig. 1 and 4, the air inlet pipe 12 extends into the negative pressure adsorption assembly 11 and is introduced with high pressure air, the high pressure air is ejected through the nozzle 121 of the air inlet pipe 12, enters the diffusion channel 113 through the joint 116, the first chamber 115 and the air inlet channel 114, and is ejected from the end opening 1131a of the conical structure 1131 in the diffusion channel 113, and the diameter of the end opening 1131a is smaller than that of other parts of the conical structure 1131, and the pressure of the ejected air is larger, so that the air flow rate of the high pressure air ejected from the end opening 1131a is also larger, so that the air pressure in the space near the end opening 1131a is reduced, and a negative pressure area is formed. Meanwhile, the gas overflowed in the stratum fracture C2 enters the casing C1 through the perforation C1a under the action of negative pressure adsorption, is further sucked into the diffusion channel 113 through the air inlet 1111 on the columnar structure 111, flows to the outside through the diffusion channel 113 together with high-pressure gas, and collects and separates the gas in the gas reservoir from the outside, so that the gas reservoir development device provided by the embodiment of the application is efficiently developed.
Wherein the high pressure gas may include nitrogen (formula: N 2 ) Nitrogen is colorless and odorless gas, and has the characteristics of inert chemical property and high chemical stability. Therefore, after the nitrogen and the gas in the gas reservoir are mixed, the nitrogen and the gas 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 diffusion channels 113 and intake channels 114 is 2, and arranged around the first channel 112. As shown in fig. 1, the gas reservoir development device provided by the embodiment of the 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 such a structure, high-pressure gas sprayed out through the gas inlet pipe 12 can enter through the double gas inlet channels 114 and flow out together with the gas in the gas reservoir through the double diffusion channels 113, so that more gas reservoir resources can be developed at the same time, and the inconvenience of descending the device into the well for many times is avoided.
Optionally, as shown in fig. 1, the diffusion channel 113 further includes a reducing structure 1132, where in a length direction of the diffusion channel 113, the reducing structure 1132 has an inner diameter gradually increasing in a direction in which the first position a extends to both sides, and the first position a is located at a side of an end of the tapered structure 1131 away from the first chamber 115. In this way, the inner diameter of one end of the necking structure 1132 is smaller, so that the high-pressure gas ejected from the end opening 1131a of the tapered structure 1131 still keeps a state that the gas pressure is higher and the gas flow speed is faster at one end of the necking structure 1132, a negative pressure region is easier to form near the end opening 1131a, the gas in the gas reservoir is easy to be sucked into the negative pressure adsorption assembly 11, meanwhile, the inner diameter of the necking structure 1132 is gradually increased in the direction that the first position a extends towards two sides, so that the gas sucked into the gas reservoir of the negative pressure adsorption assembly 11 and the ejected high-pressure gas have larger diffusion space, and flow to the outside along the diffusion channel 113 more easily to collect and separate.
Optionally, as shown in fig. 1, the gas reservoir development device further includes a plugging ball 15, where an end of the first chamber 115 away from the first channel 112 is provided with a chamber opening 1151 and a plugging ball seat 1152 located at the chamber opening 1151, and the first chamber 115 communicates with the oil pipe 14 through the chamber opening 1151, and the plugging ball 15 is configured to seat on the plugging ball seat 1152. And the occlusion ball seat 1152 is connected to the chamber opening 1151, which may be threaded. Meanwhile, the sealing ball seat 1152 has a ball seat opening 1152a, and the sealing ball 15 is seated on the ball seat opening 1152a and restricts gas exchange between the first chamber 115 and the oil pipe 14 to perform sealing. With this structure, when the air intake pipe 12 is filled with high-pressure air into the negative pressure adsorption assembly 11, the high-pressure air can flow to the air intake passage 114 through the first chamber 115 due to the non-communication between the first chamber 115 and the oil pipe 14, and the air in the air reservoir is adsorbed by the diffusion passage 113. If the first chamber 115 is in communication with the oil pipe 14, there is a certain exchange of gas between the first chamber 115 and the oil pipe 14, the pressure of the high-pressure gas ejected from the gas inlet pipe 12 may drop in the first chamber, and the gas with the reduced pressure may have a slower gas flow rate and a smaller pressure when passing through the end opening 1131a of the tapered structure 1131, which results in a lower negative pressure adsorption efficiency on the gas in the gas reservoir.
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 in communication with the first channel 112. As shown in fig. 1, the columnar structure 111 of the gas reservoir development device provided in the embodiment of the application includes two gas outlet channels 1117, and the high-pressure gas ejected from the gas inlet pipe 12 passes through the first chamber 115 and the gas inlet channel 114 to the diffusion channel 113, and is collected together with the gas in the adsorbed gas reservoir from the outside through the gas outlet channels 1117 to the first channel 112.
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 sufficiently recovered, the gas pipe 12 is lifted up, the safety joint 122 is separated 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.
In summary, the embodiment of the application provides a gas reservoir development device, which includes a negative pressure adsorption assembly and a gas inlet pipe, wherein the gas inlet pipe extends into a first channel in the negative pressure adsorption assembly, gas in the gas inlet pipe passes through a first chamber, the gas inlet channel and a diffusion channel and is matched with a conical structure in the diffusion channel, and a negative pressure area is formed near the end part of the conical structure, so that gas in a low-permeability gas reservoir is sucked into the diffusion channel through a gas inlet hole on the outer wall of the negative pressure adsorption assembly under the adsorption effect of the negative pressure, and then is collected and separated outside together with high-pressure gas through the diffusion channel, so that the exploitation speed of the gas in the low-permeability gas reservoir can be accelerated. The problem of low development efficiency of the low-permeability gas reservoir 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 can be applied to the gas reservoir development apparatus provided in the above embodiment, and the method includes the following steps:
step 501, one end of an air inlet pipe is connected with air supply equipment.
Step 502, the other end of the air inlet pipe extends into the first channel and is communicated with the first chamber.
The other end of the air inlet pipe extends into the first channel, so that the air inlet pipe is communicated with the first cavity in the negative pressure adsorption assembly.
Step 503, filling the first gas into the gas inlet pipe through the gas supply device.
And starting the air supply equipment, and filling first air into the air inlet pipe through one end of the air inlet pipe. The first gas may be nitrogen. Among them, nitrogen has stable chemical properties and is difficult to react 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 ejected from the end opening of the conical structure in the diffusion channel.
Step 504, collecting mixed gas of the first gas and the gas in the hypotonic gas reservoir through the first channel.
When the first gas is sprayed out from the end opening, a negative pressure area is formed near the end opening due to the large pressure and the large flow rate of the first gas, so that the gas in the hypotonic gas reservoir is sucked into the negative pressure adsorption component under the action of the pressure difference, flows out to the first channel along the diffusion pipeline together with the first gas, and is collected through the first channel.
In summary, the gas reservoir development method provided by the embodiment of the application can be applied to a gas reservoir development device, the device comprises a negative pressure adsorption component and an air inlet pipe, the air inlet pipe extends into a first channel in the negative pressure adsorption component, gas in the air inlet pipe passes through a first chamber, the air inlet channel and a diffusion channel and is matched with a conical structure in the diffusion channel, and a negative pressure area is formed near the end part of the conical structure, so that the gas in the low-permeability gas reservoir is sucked into the diffusion channel through an air inlet hole on the outer wall of the negative pressure adsorption component under the adsorption action of the negative pressure, and then is collected and separated outside through the diffusion channel together with high-pressure gas, and the exploitation speed of the gas in the low-permeability gas reservoir can be accelerated. The problem of low development efficiency of the low-permeability gas reservoir is solved, and the effect of improving the development efficiency of the low-permeability gas reservoir is achieved.
In the present disclosure, 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" refers to two or more, unless explicitly defined otherwise.
The foregoing is illustrative of the present application and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., which fall within the spirit and principles of the present application.
Claims (8)
1. A gas reservoir development device, comprising: negative pressure adsorption component and air inlet pipe;
the negative pressure adsorption assembly comprises a columnar structure, a first channel, a diffusion channel, an air inlet channel and a first cavity, wherein the first channel, the diffusion channel, the air inlet channel and the first cavity are arranged in the columnar structure, 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;
the diffusion channel is provided with a conical structure with an end part facing the other end of the diffusion channel, the conical structure separates the diffusion channel, and the end part of the conical structure is provided with an end opening;
the outer wall of the columnar structure is provided with an air inlet hole, the air inlet hole is communicated with the diffusion channel, and in the length direction of the diffusion channel, the air inlet hole is positioned at one side of the end opening close to the first chamber;
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 communicating with the first chamber;
the negative pressure adsorption assembly further comprises a joint positioned 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;
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 fixing pieces, wherein each set of fixing pieces comprises a first spherical fixing piece and a second spherical fixing piece;
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 diameter-reducing structure, one end of the first spring is abutted with the diameter-reducing structure at one end of the inner wall of the tubular structure, the other end of the first spring is abutted with 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 larger diameter of the conical hole faces the direction away from the first tubular sleeve, and the inner wall of the second tubular sleeve is provided with second pits corresponding to the through holes and the conical holes one by one;
wherein, in a state that the nozzle of the air inlet pipe is not connected with the joint, the second concave pit on the inner wall of the second tubular sleeve is opposite to the through hole group 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;
under the state that the nozzle of intake pipe with connect is connected, the nozzle will first tubular external member promotes to predetermineeing the position, first pit outside the first tubular external member with the through-hole is relative, first spherical mounting is in under the promotion of second tubular external member fall into first pit with in the space that the through-hole formed, be provided with step structure on the nozzle, the second spherical mounting is located step structure is kept away from one side of first tubular external member.
2. The gas reservoir development apparatus of claim 1, wherein the joint includes a sealing packing element at an end of the first tubular sleeve remote from the first spring, and wherein the nozzle of the gas inlet pipe abuts the sealing packing element in a state where the nozzle is connected to the joint.
3. A gas reservoir development device in accordance with claim 1, further comprising: the two-section oil pipe comprises two packers and two sections of oil pipes, wherein one end of one of the two sections of oil pipes is connected with one end of the first channel, one end of the other of the two sections of oil pipes is connected with the first cavity, and the other ends of the two sections of oil pipes are respectively connected with the two packers.
4. A gas reservoir development apparatus as in claim 1, wherein the first channel is located in the center of the columnar structure, the number of diffusion channels and intake channels are both 2, and are arranged around the first channel.
5. A gas reservoir development apparatus according to claim 1, wherein the diffusion channel further comprises a diameter-reducing structure therein, the diameter-reducing structure of the diffusion channel gradually increasing in a direction in which a first position, which is located on a side of an end of the tapered structure away from the first chamber, extends to both sides in a length direction of the diffusion channel.
6. A gas reservoir development device as in claim 3, further comprising a plugging ball;
the one end that first cavity kept away from first passageway is provided with the cavity opening and is located cavity open-ended shutoff ball seat, first cavity passes through cavity opening and oil pipe intercommunication, the shutoff ball is used for sitting on the shutoff ball seat.
7. A gas reservoir development apparatus according to any one of claims 1 to 6, wherein the columnar structure further comprises a gas outlet passage, the other end of the diffusion passage is connected to one end of the gas outlet passage, and the other end of the gas outlet passage is communicated with the first passage.
8. A gas reservoir development method for collecting a gas-liquid mixture in a low-permeability gas reservoir corresponding to a low-permeability gas well by the gas reservoir development apparatus according to any one of claims 1 to 7, 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 with the first chamber;
filling first gas into the air inlet pipe through the gas supply equipment;
a mixture of the first gas and a gas-liquid mixture in the hypotonic gas reservoir is collected through the first passageway.
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| CN202110518582.2A CN115341876B (en) | 2021-05-12 | 2021-05-12 | Gas reservoir development device and method |
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| CN202110518582.2A CN115341876B (en) | 2021-05-12 | 2021-05-12 | Gas reservoir development device and method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN103233923A (en) * | 2013-04-18 | 2013-08-07 | 西安交通大学 | Injection device for discharging accumulated fluids in shaft |
| WO2014077947A1 (en) * | 2012-11-16 | 2014-05-22 | Exxonmobil Upstream Research Company | Integrated liquid-to-gas artificial lift and bitumen dilution methods and systems |
| CN105089608A (en) * | 2014-05-14 | 2015-11-25 | 中国石油天然气股份有限公司 | Spraying tool capable of being matched with underground eddy current tool to realize water drainage and gas production and application method of spraying tool |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR0303129B1 (en) * | 2003-08-14 | 2013-08-06 | Method and apparatus for the production of oil wells | |
| JP5347154B2 (en) * | 2006-06-28 | 2013-11-20 | 小出 仁 | CO2 underground storage processing method and system |
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2021
- 2021-05-12 CN CN202110518582.2A patent/CN115341876B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86103075A (en) * | 1986-05-01 | 1987-11-11 | 纽普罗有限公司 | Down hole reverse up flow jet pump |
| WO2014077947A1 (en) * | 2012-11-16 | 2014-05-22 | Exxonmobil Upstream Research Company | Integrated liquid-to-gas artificial lift and bitumen dilution methods and systems |
| CN103233923A (en) * | 2013-04-18 | 2013-08-07 | 西安交通大学 | Injection device for discharging accumulated fluids in shaft |
| CN105089608A (en) * | 2014-05-14 | 2015-11-25 | 中国石油天然气股份有限公司 | Spraying tool capable of being matched with underground eddy current tool to realize water drainage and gas production and application method of spraying tool |
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