CN206554901U - Water drainage gas production device - Google Patents

Water drainage gas production device Download PDF

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Publication number
CN206554901U
CN206554901U CN201720003197.3U CN201720003197U CN206554901U CN 206554901 U CN206554901 U CN 206554901U CN 201720003197 U CN201720003197 U CN 201720003197U CN 206554901 U CN206554901 U CN 206554901U
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gas
liquid
sleeve pipe
flow arrangement
space
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CN201720003197.3U
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阳建平
孙而杰
张海祖
姚睿
张维祎
李思瑶
胡鑫
李仪仟
赵麟天
周建明
鲁振国
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Petrochina Co Ltd
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Petrochina Co Ltd
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Abstract

The embodiment of the utility model provides a drainage gas production device, include: the gas production pipe column, the gas-liquid flow dividing device and the liquid guiding pipe are positioned inside the sleeve; the casing is provided with a perforation on the well section at the gas layer position; the gas-liquid shunting device and the sleeve form sealing through a packer to divide the sleeve into a first part space and a second part space; the upper part of the gas-liquid flow dividing device is connected with the lower part of the gas production pipe column to form a gas output channel; the lower part of the gas-liquid flow dividing device is connected with the upper part of the liquid guiding pipe, and the lower part of the liquid guiding pipe is connected with the one-way valve and used for guiding the liquid in the liquid accumulating area to the first part space of the sleeve; the coiled tubing is put into the annular space of the casing from the casing opening of the casing; the bottom of the coiled tubing is positioned at a preset height above the packer; the upper part of the continuous oil pipe is respectively connected with a foam adding device and a gas injection device. The utility model discloses can improve gaseous recovery ratio.

Description

Water drainage gas production device
Technical field
The utility model is related to petroleum and natural gas production technique field, more particularly to a kind of water drainage gas production device.
Background technology
Domestic and international most natural gas pool, the partially or fully region on its border, all by stratum water (Bian Shui, bottom water, Or side, bottom water coexist) surrounded;In recovery process, with the reduction of pressure, stratum water is constantly invaded in gas-bearing formation;Nearly well After band High water cut, flowing of the gas to producing well is just limited;Producing well water outlet is also inevitable.Therefore, how by well Water in cylinder is discharged in time, is that gas well is able to maintain that the key normally produced.
In the prior art, according to factors such as well depth, water yield, hole condition, reservoirs, a variety of drainage technology sides of research and development Method, according to its drainage principle, can substantially return and be divided into two classes:Water class is lifted by external force draining type and by stratum energy Type.
Mainly include by external force draining type:(1) mechanical water discharge technology (pumping), for example pump pump drainage, electric submersible pump Continuously circulation natural gas injection water discharge technology and the re-injection of (4) underground are arranged for draining, turbine pump drainage etc., (2) gaslift water discharge technology, (3) Water technology etc..
Mainly include by stratum energy lifting water type:(1) optimization tubing string, (2) coiled tubing water discharge technology (with it is excellent Change tubing string similar), (3) foaming water discharge technology (referred to as bubble row), (4) ultrasonic atomization water discharge technology and (5) plunger lift draining Technology etc..
However, due to the drainage technology method by external force draining type, it is necessary to submergence, therefore shaft bottom can be caused to deposit Water, causes shaft bottom water to be inhaled near wellbore zone reverse osmosis, makes the seepage channel of gas by slowly water logging, thus gas is near wellbore zone Filtrational resistance increase, meanwhile, also reduce shaft bottom producing pressure differential.
The drainage technology method of water type is lifted by stratum energy, on the one hand shaft bottom can be caused to have hydrops, therefore Inevitably occur reverse osmosis to inhale so that filtrational resistance of the gas near wellbore zone increases, in another aspect gas production tubing string, gas The flowing of body must pull against the resistance of water, and causing air-flow, smooth, producing pressure differential is not reduced so that gas producting rate is slow, in addition, at this Under class technique, by gas band water, then bottom pressure increase, along with reverse osmosis is inhaled, can cause producing pressure differential to reduce, cause gas Flowing is not smooth, makes the reduction of gas production capacity, so, the drainability of whole system can also be reduced, and after drainability reduction, leads again The increase of shaft bottom water is caused, so as to form vicious circle.In summary, using water drainage gas production device of the prior art, all deposit In certain limitation, so as to cause the recovery ratio of gas relatively low.
Utility model content
In view of this, the utility model embodiment provides a kind of water drainage gas production device, to improve the recovery ratio of gas.
To reach above-mentioned purpose, the utility model mainly provides following technical scheme:
The utility model embodiment provides a kind of water drainage gas production device, including:Gas production tubing string, sleeve pipe, gas-liquid shunting dress Put, liquid guiding tube, coiled tubing, foam adding set and gas injection device;Wherein:
The gas production tubing string, the gas-liquid part flow arrangement and the liquid guiding tube are located at the inside of described sleeve pipe;Described sleeve pipe Perforation is provided with the well section positioned at gas-bearing formation position;
Sealed between the gas-liquid part flow arrangement and sleeve pipe by packer formation, sleeve pipe is divided into Part I space With Part II space;The Part I space is used to keep in aqueous;The Part II space be used for gas-liquid separation and Temporary aqueous;
The top of the gas-liquid part flow arrangement is connected with the bottom of the gas production tubing string, forms gas output passage;It is described The bottom of gas-liquid part flow arrangement is connected with the top of the liquid guiding tube, and the bottom of the liquid guiding tube is connected with the check valve, is used Liquid guide flow in by hydrops area is in the Part I space of described sleeve pipe;
The coiled tubing is lowered into casing annulus by the sleeve opening of described sleeve pipe;The bottom of the coiled tubing is located at At preset height above packer;The top of the coiled tubing respectively with the foam adding set and the gas injection device Connection.
Alternatively, the foam adding set includes:Foam tank and injection pump;Wherein, one end of the foam tank and institute One end connection of injection pump is stated, the other end of the injection pump is connected with the coiled tubing.
Alternatively, the gas injection device includes compressor;Wherein, one end of the compressor and the gas production tubing string is upper Portion's gas transmission line connection, the other end of the compressor is connected with the coiled tubing.
Alternatively, the packer is located at the preset height more than at the top of gas-bearing formation.
Alternatively, in addition to:Mend away from short tube;Wherein, under one end and the gas-liquid part flow arrangement away from short tube of the benefit Portion is connected, and the other end of the benefit away from short tube is connected with the top of the liquid guiding tube.
Alternatively, the described one end of benefit away from short tube is connected by joint with the bottom of the gas-liquid part flow arrangement, described to mend The other end away from short tube is connected by joint with the top of the liquid guiding tube.
Alternatively, the top of the gas production tubing string is connected by valve with one end of the gas injection device;The air collecting pipe The bottom of post is connected by joint with the top of the gas-liquid part flow arrangement.
Alternatively, the other end of the injection pump is connected by valve with the coiled tubing.
Alternatively, the other end of the compressor is connected by valve with the coiled tubing.
By above-mentioned technical proposal, the utility model water drainage gas production device at least has the advantages that:
The water drainage gas production device that the utility model embodiment is provided, including gas production tubing string, sleeve pipe, gas-liquid part flow arrangement, draw Liquid pipe, coiled tubing, foam adding set and gas injection device;Wherein, gas production tubing string, gas-liquid part flow arrangement and liquid guiding tube are located at set The inside of pipe;Sleeve pipe is provided with perforation in the well section positioned at gas-bearing formation position;Pass through packing between gas-liquid part flow arrangement and sleeve pipe Device formation sealing, Part I space and Part II space are divided into by sleeve pipe;Part I space is used to keep in aqueous;The Two segment spaces are used for the separation of gas-liquid and temporary aqueous;The top of gas-liquid part flow arrangement is connected with the bottom of gas production tubing string, shape Into gas output passage;The bottom of gas-liquid part flow arrangement and the top of liquid guiding tube are connected, and the bottom of liquid guiding tube is connected with check valve, For in the Part I space by the liquid guide flow in hydrops area to sleeve pipe;Coiled tubing is lowered into set by the sleeve opening of sleeve pipe In pipe ring is empty;The bottom of coiled tubing is located at the preset height above packer;The top of coiled tubing adds with foam respectively Feeder apparatus and gas injection device connection.Because sleeve pipe implements perforation, and gas-liquid part flow arrangement in the well section positioned at gas-bearing formation position Bottom and liquid guiding tube top connect, between gas-liquid part flow arrangement and sleeve pipe pass through packer formation sealing so that in gas-bearing formation Aqueous enter Part II space (below packer) after, aqueous is by bottom pressure, from hydrops area water conservancy diversion to packer In casing annulus above;Again respectively by foam adding set and gas injection device via coiled tubing to packer top Casing annulus in injection foaming agent and natural gas, in pit shaft foaming agent with aqueous after natural gas is stirred, mixed, shape Into foam solution stream;Sleeve opening is lifted to by the energy of the natural gas of injection flow out to ground again.The water pumping gas production pattern, it is first First it can not only avoid perforated interval from being submerged in water, contain shaft bottom water to the generation of near wellbore zone gas-bearing formation reverse osmosis suction phenomenon, And then ensure that gas is unobstructed near wellbore zone seepage flow;And due to separately being flowed in gas-liquid after, gas is in gas production tubing string Single-phase flow, the resistance without overcoming water so that after shaft bottom back pressure (being only gas column pressure) reduction, the tune of producing pressure differential Control amplitude is greatly increased, it is possible thereby to extend the production time of gas well, improve the gas producting rate and recovery ratio in gas field.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are Some embodiments of the present utility model, for those of ordinary skill in the art, are not paying the premise of creative labor Under, other accompanying drawings can also be obtained according to these accompanying drawings.
A kind of structural representation for water drainage gas production device that Fig. 1 provides for the utility model embodiment.
Reference:
1- valves;2- gas production tubing strings;3- sleeve pipes;
4- joints;5- packers;6- gas-liquid part flow arrangements;
7- is mended away from short tube;8- liquid guiding tubes;9- hydrops area;
10- check valves;11- perforations;12- coiled tubings;
13- injection pumps;14- foam tanks;15- compressors;
16- foam adding sets;17- gas injection devices.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched The embodiment stated is a part of embodiment of the utility model, rather than whole embodiments.Based on the implementation in the utility model Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made is belonged to The scope of the utility model protection.
Further to illustrate that the utility model is to reach technological means and effect that predetermined utility model purpose is taken, Below in conjunction with accompanying drawing and preferred embodiment, embodiment, knot to the water drainage gas production device according to the present utility model application Structure, feature and its effect, are described in detail as after.In the following description, what different " embodiment " or " embodiment " referred to differs Surely it is same embodiment.In addition, the special characteristic, structure or feature in one or more embodiments can be by any suitable form groups Close.
Before being illustrated to embodiment of the present utility model, first with regard to some concepts in natural gas extraction field Explain:
Water drive gas reservoir
Domestic and international most natural gas pool, the partially or fully region on its border, all by stratum water (Bian Shui, bottom water, Or side, bottom water coexist) surrounded;Such gas reservoir, with the decline of gas-bearing formation pressure, causes in by natural energy development process Peripheral stratum water constantly invades gas reservoir, and gas well also will inevitably water outlet.Such gas reservoir is referred to as water drive gas reservoir.
A kind of structural representation for water drainage gas production device that Fig. 1 provides for the utility model embodiment, as shown in figure 1, this Utility model embodiment provides a kind of water drainage gas production device, including gas production tubing string 2, sleeve pipe 3, gas-liquid part flow arrangement 6, liquid guiding tube 8th, coiled tubing 12, foam adding set 16 and gas injection device 17;Wherein, gas production tubing string 2, gas-liquid part flow arrangement 6 and liquid guiding tube 8 Positioned at the inside of sleeve pipe 3, sleeve pipe 3 is provided with perforation 11 in the well section positioned at gas-bearing formation position;Gas-liquid part flow arrangement 6 and sleeve pipe 3 Between by packer 5 formation seal, sleeve pipe 3 is divided into Part I space (space of packer more than 5) and second Divide in space (space of the packer below 5), Part I space is used to keep in aqueous, and Part II space is used for the separation of gas-liquid With temporary aqueous;The top of gas-liquid part flow arrangement 6 is connected with the bottom of gas production tubing string 2, forms gas output passage;Gas-liquid is shunted The bottom of device 6 is connected with the top of liquid guiding tube 8, and the bottom of liquid guiding tube 8 is connected with check valve 10, for by the liquid in hydrops area Body water conservancy diversion is in the Part I space of sleeve pipe 3;Coiled tubing 12 is lowered into casing annulus by the sleeve opening of sleeve pipe 3;Continuously The bottom of oil pipe 12 is located at the preset height of the top of packer 5;The top of coiled tubing 12 respectively with foam adding set 16 Connected with gas injection device 17.
Specifically, the production process of traditional water drive gas reservoir would generally be divided into three phases, including:1) anhydrous gas production The characteristics of stage, stage is that gas relies on natural energy, and ground is sprayed onto certainly.2) water flowing phase is taken, is the characteristics of the stage With the output of gas, water body starts to invade gas reservoir, natural gas, a small amount of stratum water simultaneously seepage flow to after shaft bottom, by from The castering action of jet body, gas carrier stratum water is together from ground is sprayed onto, and the production time in stage is relatively short.It is very aobvious So, gas must pull against the resistance of water in tubing string, can just flow to ground;Inevitably reduce producing pressure differential, gas production speed Degree is also synchronous to be declined.3) the characteristics of water pumping gas production stage, stage is being continuously increased with water yield, the resistance of gas flow Increasing, gas well yield also begins to drastically decline;The gas of output can not give rise to shaft bottom water ground, only By external force, the ponding in pit shaft is discharged into ground, normal production could be maintained.If the stage can not be in time by pit shaft Water discharge, gas well would become hard to be able to maintain that normal production, or even water logging stop production.Therefore, it is how effective by pit shaft Water discharge is very important.
The present embodiment is specifically described below by the principle and the course of work of water drainage gas production device.
In the present embodiment, as shown in figure 1, dotted line is the flow direction of natural gas in Fig. 1, solid line is the flowing side of aqueous To double dot dash line is the flow direction of the foaming agent added in foam adding set.Wherein, hydrops area 9 is used to keep in liquid, example Such as keep in aqueous.In addition, the bottom of gas-liquid part flow arrangement 6 is connected with the top of liquid guiding tube 8, gas-liquid part flow arrangement 6 and sleeve pipe 3 it Between by packer 5 formation seal, sleeve pipe 3 is separated into Part I space (more than packer) and Part II space (below packer);Wherein, liquid guiding tube 8 is located in hydrops area 9.
In process of production, due to sleeve pipe 3 implemented in the well section positioned at gas-bearing formation position it is natural in perforation 11, reservoir Gas and aqueous can be continuously flowed into the annular space of sleeve pipe 3 of the packer below 5 by perforation 11, i.e. the Part II of sleeve pipe In space;Due to receiving the differentiation of gravity, now natural gas is by upward onlap at top, and aqueous will fall to product downwards In liquid zone 9.Because the bottom of gas production tubing string 2 is connected with the top of gas-liquid part flow arrangement 6, the circulation passage of natural gas can be constituted, Therefore, natural gas can be entered in gas production tubing string 2 by the threeway tubing string on gas-liquid part flow arrangement 6, and be flowed out by gas production tubing string 2 To ground.Because the bottom of gas-liquid part flow arrangement 6 is connected with the top of liquid guiding tube 8, lead between gas-liquid part flow arrangement 6 and sleeve pipe 3 Cross packer 5 and form sealing, and the bottom of liquid guiding tube 8 is connected with check valve 10, therefore, the aqueous in hydrops area 9 is in shaft bottom Under pressure effect, by check valve 10, liquid guiding tube 8 and gas-liquid part flow arrangement 6, then on return ring to the sleeve pipe 3 of packer more than 5 In shape space, i.e., in the Part I space of sleeve pipe 3.Further, since gas and liquid are separated flowings, gas is in air collecting pipe The resistance of water need not be overcome in post 2, and keeps single-phase flow so that flowing is unobstructed, flow velocity is fast, and due to gas-bearing formation perforated interval Without hydrops, it can avoid and contain that reverse osmosis inhales the generation of phenomenons such as (water resistance gas).
In the annular space of sleeve pipe 3 alternatively, it is also possible to detect packer more than 5 using echometer (movable type) (not shown) Liquid level, when detecting liquid level and reaching preset height, from foam adding set 16 via coiled tubing 12 to packer 5 Injection foaming agent in the casing annulus on top, meanwhile, the natural gas on ground is flowed out to from gas production tubing string 2, a portion is passed through Gas injection device 17 is injected into the annular space of sleeve pipe 3 of packer more than 5.Foaming agent in pit shaft is mixed through natural gas agitation with aqueous Afterwards, foam solution stream is formd, density is substantially reduced, in addition, from sleeve opening flowing out to ground by the energy of the natural gas of injection again Face.Due to being injected separately into foaming agent and natural gas by foam adding set 16 and gas injection device 17, it can be ensured that the of sleeve pipe 3 In a part of annular space, i.e. the aqueous of packer more than 5 is discharged to ground in time, to ensure shaft bottom without ponding.
The water drainage gas production device that the utility model embodiment is provided, including gas production tubing string, sleeve pipe, gas-liquid part flow arrangement, draw Liquid pipe, coiled tubing, foam adding set and gas injection device;Wherein, gas production tubing string, gas-liquid part flow arrangement and liquid guiding tube are located at set The inside of pipe;Sleeve pipe is provided with perforation in the well section positioned at gas-bearing formation position;Pass through packing between gas-liquid part flow arrangement and sleeve pipe Device formation sealing, Part I space and Part II space are divided into by sleeve pipe;Part I space is used to keep in aqueous;The Two segment spaces are used for the separation of gas-liquid and temporary aqueous;The top of gas-liquid part flow arrangement is connected with the bottom of gas production tubing string, shape Into gas output passage;The bottom of gas-liquid part flow arrangement and the top of liquid guiding tube are connected, and the bottom of liquid guiding tube is connected with check valve, For in the Part I space by the liquid guide flow in hydrops area to sleeve pipe;Coiled tubing is lowered into set by the sleeve opening of sleeve pipe In pipe ring is empty;The bottom of coiled tubing is located at the preset height above packer;The top of coiled tubing adds with foam respectively Feeder apparatus and gas injection device connection.Because sleeve pipe implements perforation, and gas-liquid part flow arrangement in the well section positioned at gas-bearing formation position Bottom and liquid guiding tube top connect, sealing is formd by packer between gas-liquid part flow arrangement and sleeve pipe, when in gas-bearing formation Aqueous enter after Part II space (below packer), aqueous just can be by bottom pressure, from hydrops area water conservancy diversion In casing annulus more than to packer;Again respectively by foam adding set and gas injection device via coiled tubing to envelope Every injecting foaming agent and natural gas in the casing annulus on device top, foaming agent is stirred by natural gas with aqueous, mixed in pit shaft After conjunction, foam solution stream is formd;Sleeve opening is lifted to by the energy of the natural gas of injection flow out to ground again.The draining is adopted Gas pattern can not only avoid perforated interval from being submerged in water, contain shaft bottom water to the hair of near wellbore zone gas-bearing formation reverse osmosis suction phenomenon It is raw, and then ensure that gas is unobstructed near wellbore zone seepage flow;And due to separately being flowed in gas-liquid after, gas is in gas production tubing string Interior single-phase flow, the resistance without overcoming water so that after shaft bottom back pressure (being only gas column pressure) reduction, producing pressure differential Regulation and control amplitude is greatly increased, it is possible thereby to extend the final of the production time of gas well, the gas producting rate for improving gas field and gas reservoir Recovery ratio.
Further, as shown in figure 1, the foam adding set 16 includes foam tank 14 and injection pump 13;Wherein, foam tank 14 one end is connected with one end of injection pump 13, and the other end of injection pump 13 is connected with coiled tubing 12.
Specifically, in process of production, packer 5 can be detected by using echometer (movable type) (not shown) More than the annular space of sleeve pipe 3 in liquid level, when liquid level reaches preset height, by injection pump 13 by the foaming in foam tank 14 Agent is injected into via coiled tubing 12 in the casing annulus on the top of packer 5;Meanwhile, the day on ground is flowed out to from gas production tubing string 2 Right gas, a portion is used for outer defeated, and another part can be injected into the annular space of sleeve pipe 3 of packer more than 5 by gas injection device It is interior.Foaming agent in pit shaft mixed through natural gas agitation with aqueous after, form foam solution stream, density is substantially reduced;Again by The energy of the natural gas of injection flows out to ground from sleeve opening, and this process is referred to as Municipal secondary effluent.In addition, preset height can basis Actual conditions or experience are configured, such as can be 0.5m or 1m, for the specific value of preset height, the present embodiment This is not restricted.
It is worth noting that, in actual applications, it be able to can be carried out continuously according to the water yield in shaft bottom, drainage procedure, Can also intermittently it carry out.
Because by injecting foaming agent and natural gas into sleeve pipe on ground, the stratum water that will be stored in casing space is arranged Go out ground, it may thereby be ensured that shaft bottom without be in ponding, and drainage procedure by using stratum energy draining with being arranged by external force Water is combined together, and makes draining in time, actively, so as to avoid the generation that shaft bottom hydrops floods the phenomenons such as perforated interval.
Alternatively, as shown in figure 1, gas injection device 17 includes compressor 15;Wherein, one end of compressor 15 and gas production tubing string 2 top gas transmission line connection, the other end of compressor 15 is connected with coiled tubing 12.When monitoring that liquid level reaches preset height When, the foaming agent in foam tank 14 is injected into via coiled tubing 12 in the casing annulus on the top of packer 5 by injection pump 13; Meanwhile, the natural gas on ground is flowed out to from gas production tubing string 2, a portion is connected by compressor 15 with coiled tubing, directly It is injected into the annular space of sleeve pipe 3 of packer more than 5, or the annular space of sleeve pipe 3 for being injected into packer more than 5 is compressed by compressor 15 It is interior, it is possible thereby to the stratum water discharge ground that will be stored in casing space, it can be ensured that shaft bottom is without ponding.
Alternatively, as shown in figure 1, packer 5 is located at the preset height more than at the top of gas-bearing formation.Due to packer 5 being set At the certain altitude for being placed on gas-bearing formation top, the gas and liquid that are flowed into out of gas-bearing formation can be made in the Part II of sleeve pipe 3 In annular space, i.e., separated in space of the packer below 5, and the liquid discharged from hydrops area 9 can be temporarily stored in set In the Part I annular space of pipe 3, the i.e. space of packer more than 5, it is possible thereby to complete one-level draining, not only cause gas-bearing formation Perforated interval can avoid without hydrops and contain that reverse osmosis inhales (water resistance gas) and forms the generation of the phenomenons such as water cone.
Alternatively, as shown in figure 1, the water drainage gas production device, in addition to mend away from short tube 7;Wherein, one end away from short tube 7 is mended It is connected with the bottom of gas-liquid part flow arrangement 6, mends the other end away from short tube 7 and be connected with the top of liquid guiding tube 8.Due to by mending away from short Pipe 7 can adjust the length of gas production tubing string 2, it is possible thereby to improve the flexibility that water drainage gas production device is used.
Alternatively, it is connected, is mended with the bottom of gas-liquid part flow arrangement 6 by joint 4 as shown in figure 1, mending one end away from short tube 7 The other end away from short tube 7 is connected by joint 4 with the top of liquid guiding tube 8.Shunted due to that will be mended by joint away from short tube and gas-liquid Device and liquid guiding tube connection, further ensure the use reliability of water drainage gas production device.
Alternatively, as shown in figure 1, the top of gas production tubing string 2 is connected by valve 1 with one end of gas injection device 17, gas production The bottom of tubing string 2 is connected by joint 4 with the top of gas-liquid part flow arrangement 6.Natural gas is by the threeway on gas-liquid part flow arrangement 6 Tubing string enters in gas production tubing string 2, opens the valve 1 on gas production tubing string 2, and natural gas can flow out to ground.Due to passing through valve The flow direction of natural gas is controlled, arrangement of making rational planning for can be carried out to the flow direction of natural gas.
Alternatively, as shown in figure 1, the other end of injection pump 13 is connected by valve 1 with coiled tubing 12.Due to passing through valve Goalkeeper's injection pump and coiled tubing connection, it is possible thereby to the flexibly injection of control foaming agent.
Alternatively, as shown in figure 1, the other end of compressor 15 is connected by valve 1 with coiled tubing 12.Due to passing through valve Goalkeeper's compressor and coiled tubing connection, it is possible thereby to the flexibly injection of control natural gas.
The water drainage gas production device that the utility model embodiment is provided, including gas production tubing string, sleeve pipe, gas-liquid part flow arrangement, draw Liquid pipe, coiled tubing, foam adding set and gas injection device;Wherein, gas production tubing string, gas-liquid part flow arrangement and liquid guiding tube are located at set The inside of pipe;Sleeve pipe is provided with perforation in the well section positioned at gas-bearing formation position;Pass through packing between gas-liquid part flow arrangement and sleeve pipe Device formation sealing, Part I space and Part II space are divided into by sleeve pipe;Part I space is used to keep in aqueous;The Two segment spaces are used for the separation of gas-liquid and temporary aqueous;The top of gas-liquid part flow arrangement is connected with the bottom of gas production tubing string, shape Into gas output passage;The bottom of gas-liquid part flow arrangement and the top of liquid guiding tube are connected, and the bottom of liquid guiding tube is connected with check valve, For in the Part I space by the liquid guide flow in hydrops area to sleeve pipe;Coiled tubing is lowered into set by the sleeve opening of sleeve pipe In pipe ring is empty;The bottom of coiled tubing is located at the preset height above packer;The top of coiled tubing adds with foam respectively Feeder apparatus and gas injection device connection.Because sleeve pipe implements perforation, and gas-liquid part flow arrangement in the well section positioned at gas-bearing formation position Bottom and liquid guiding tube top connect, between gas-liquid part flow arrangement and sleeve pipe pass through packer formation sealing so that in gas-bearing formation Aqueous enter Part II space (below packer) after, aqueous is by bottom pressure, from hydrops area water conservancy diversion to packer In casing annulus above;Again respectively by foam adding set and gas injection device via coiled tubing to packer top Casing annulus in injection foaming agent and natural gas, in pit shaft foaming agent with aqueous after natural gas is stirred, mixed, shape Into foam solution stream;Sleeve opening is lifted to by the energy of the natural gas of injection flow out to ground again.The water pumping gas production pattern, it is first First it can not only avoid perforated interval from being submerged in water, contain shaft bottom water to the generation of near wellbore zone gas-bearing formation reverse osmosis suction phenomenon, And then ensure that gas is unobstructed near wellbore zone seepage flow;And due to separately being flowed in gas-liquid after, gas is in gas production tubing string Single-phase flow, the resistance without overcoming water so that after shaft bottom back pressure (being only gas column pressure) reduction, the tune of producing pressure differential Control amplitude is greatly increased, it is possible thereby to extend the production time of gas well, improve the gas producting rate and recovery ratio in gas field.
Finally it should be noted that:Various embodiments above is only limited to illustrate the technical solution of the utility model, rather than to it System;Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should Understand:It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole Technical characteristic carries out equivalent substitution;And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly The scope of each embodiment technical scheme of type.

Claims (9)

1. a kind of water drainage gas production device, it is characterised in that including:It is gas production tubing string, sleeve pipe, gas-liquid part flow arrangement, liquid guiding tube, continuous Oil pipe, foam adding set and gas injection device;Wherein:
The gas production tubing string, the gas-liquid part flow arrangement and the liquid guiding tube are located at the inside of described sleeve pipe;Described sleeve pipe is in place In being provided with perforation in the well section at gas-bearing formation position;
Sealed between the gas-liquid part flow arrangement and sleeve pipe by packer formation, sleeve pipe is divided into Part I space and the Two segment spaces;The Part I space is used to keep in aqueous;The Part II space is used for the separation of gas-liquid and kept in Aqueous;
The top of the gas-liquid part flow arrangement is connected with the bottom of the gas production tubing string, forms gas output passage;The gas-liquid The bottom of part flow arrangement is connected with the top of the liquid guiding tube, and the bottom of the liquid guiding tube is connected with check valve, for by hydrops Liquid guide flow in area is in the Part I space of described sleeve pipe;
The coiled tubing is lowered into casing annulus by the sleeve opening of described sleeve pipe;The bottom of the coiled tubing is located at packing At preset height above device;The top of the coiled tubing connects with the foam adding set and the gas injection device respectively Connect.
2. device according to claim 1, it is characterised in that the foam adding set includes:Foam tank and injection pump; Wherein, one end of the foam tank is connected with one end of the injection pump, the other end of the injection pump and the coiled tubing Connection.
3. device according to claim 1, it is characterised in that the gas injection device includes compressor;Wherein, the compression One end of machine is connected with the top gas transmission line of the gas production tubing string, and the other end of the compressor connects with the coiled tubing Connect.
4. device according to claim 1, it is characterised in that the packer is located at the preset height more than at the top of gas-bearing formation Place.
5. the device according to claim any one of 1-4, it is characterised in that also include:Mend away from short tube;Wherein, it is described to mend One end away from short tube is connected with the bottom of the gas-liquid part flow arrangement, and the other end of the benefit away from short tube is upper with the liquid guiding tube Portion is connected.
6. device according to claim 5, it is characterised in that the one end of the benefit away from short tube passes through joint and the gas-liquid The bottom connection of part flow arrangement, the other end of the benefit away from short tube is connected by joint with the top of the liquid guiding tube.
7. the device according to claim any one of 1-4, it is characterised in that the top of the gas production tubing string by valve with One end connection of the gas injection device;The bottom of the gas production tubing string is connected by the top of joint and the gas-liquid part flow arrangement Connect.
8. device according to claim 2, it is characterised in that the other end of the injection pump by valve with it is described continuous Oil pipe is connected.
9. device according to claim 3, it is characterised in that the other end of the compressor by valve with it is described continuous Oil pipe is connected.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108691523A (en) * 2018-06-07 2018-10-23 四川省友邦石油化工科技有限公司 A kind of concentric little oil pipe gas-lift working barrel and its airlift unit
CN110878684A (en) * 2018-09-06 2020-03-13 中国石油天然气股份有限公司 Water drainage gas production device
CN111173488A (en) * 2020-03-16 2020-05-19 西安诚科石油工程技术服务有限公司 Method for realizing production of gas well by using controllable shock wave
CN111364979A (en) * 2020-03-23 2020-07-03 中国石油大学(华东) Underground gas invasion monitoring system based on ultrasonic waves
CN111364959A (en) * 2020-03-30 2020-07-03 中国石油天然气集团有限公司 Foam drainage gas production device for simulating shaft injection and rod throwing and simulation method
CN114934762A (en) * 2022-05-09 2022-08-23 中国地质大学(北京) Heavy oil reservoir oil production method and oil production system thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108691523A (en) * 2018-06-07 2018-10-23 四川省友邦石油化工科技有限公司 A kind of concentric little oil pipe gas-lift working barrel and its airlift unit
CN110878684A (en) * 2018-09-06 2020-03-13 中国石油天然气股份有限公司 Water drainage gas production device
CN111173488A (en) * 2020-03-16 2020-05-19 西安诚科石油工程技术服务有限公司 Method for realizing production of gas well by using controllable shock wave
CN111173488B (en) * 2020-03-16 2021-11-30 西安诚科石油工程技术服务有限公司 Method for realizing production of gas well by using controllable shock wave
CN111364979A (en) * 2020-03-23 2020-07-03 中国石油大学(华东) Underground gas invasion monitoring system based on ultrasonic waves
CN111364979B (en) * 2020-03-23 2023-05-23 中国石油大学(华东) Underground gas invasion monitoring system based on ultrasonic waves
CN111364959A (en) * 2020-03-30 2020-07-03 中国石油天然气集团有限公司 Foam drainage gas production device for simulating shaft injection and rod throwing and simulation method
CN111364959B (en) * 2020-03-30 2022-08-02 中国石油天然气集团有限公司 Foam drainage gas production device for simulating shaft injection and rod throwing and simulation method
CN114934762A (en) * 2022-05-09 2022-08-23 中国地质大学(北京) Heavy oil reservoir oil production method and oil production system thereof

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