CN102817594A - Drainage gas recovery method and device of horizontal well - Google Patents
Drainage gas recovery method and device of horizontal well Download PDFInfo
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- CN102817594A CN102817594A CN2012103269256A CN201210326925A CN102817594A CN 102817594 A CN102817594 A CN 102817594A CN 2012103269256 A CN2012103269256 A CN 2012103269256A CN 201210326925 A CN201210326925 A CN 201210326925A CN 102817594 A CN102817594 A CN 102817594A
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Abstract
The invention discloses a drainage gas recovery method and device of a horizontal well. The drainage gas recovery method comprises the steps of: dividing the whole gas well into a straight well section, a deflecting section and a horizontal section; separating the straight section from the deflecting section and the horizontal section by using a sealer; discharging accumulated liquid in the deflecting section and the horizontal section to the straight well section by adopting a small-diameter pipe; and discharging the accumulated liquid of the straight well section by adopting a conventional process. The drainage gas recovery device comprises oil pipes arranged in the straight well section, the deflecting pipe and the horizontal section, wherein the sealer is arranged on the oil pipe of the straight well section and is used for separating the straight well section from the deflecting section and the horizontal section; a small-diameter pipe with diameter less than that of the oil pipe is connected to the sealer; and the tail end of the small-diameter pipe extends into the horizontal section. By using the energy of the stratum, natural gas and produced liquid in the horizontal section are discharged to the straight well section through the small-diameter pipe, and liquid in the straight well section is lifted out of the shaft to reach the ground by adopting a conventional drainage gas recovery process, so that a relay type drainage gas recovery process is formed, and continuous liquid-carrying production can be realized. The drainage gas recovery method and device have the advantages of high efficiency and long persistence, and is reliable and stabile.
Description
Technical field
The present invention relates to the gas producing technology of gas well, specifically is a kind of horizontal well water pumping gas production method, and the water pumping gas production device of this method of being directed against.
Background technology
The water pumping gas production technology is to be a kind of common technical method in the manufacturing process of gas field, is used in time discharging the hydrops in the gas well pit shaft, guarantees that gas passage is smooth and easy, avoids the stratum to reduce the gas well gas deliverability because of hydrops stops up.Conventional water drainage-gas recovery technology is mainly used in the directional well of straight well and constant slope, like foaming water discharge gas production, plunger water pumping gas production, gaslift water pumping gas production, machine pump drainage hydromining gas etc.Along with after the hole deviation number of degrees surpass certain limit, because the influence of hole deviation, the equipment of conventional water drainage-gas recovery technology is difficult at the bottom of the lower going-into-well; And because tubing size is bigger; Under the situation that gas well deliverability reduces, gas flow rate is lower, the easy attaching oil inside pipe wall of liquid that gas is taken and landing to shaft bottom once more; Make drainage efficiency lower, the shaft bottom hydrops is difficult to effectively, in time discharges.This situation is the most common in horizontal well.
In recent years, horizontal well has become a ripe practical technique of gas field development, has obtained wide popularization and application.In actual production process, owing to inevitably exist the output of stratum irreducible water or formation water, these water accumulate in the shaft bottom-horizontal segment of horizontal well; When gas well deliverability reduced, gas flow rate was lower, and air-flow just is difficult to hydrops is carried out smoothly; Particularly at horizontal segment and inclination section; Drop in the air-flow attaches than straight well Duan Gengyi and accumulates on the tubing wall, and glides and fall after rise in the shaft bottom, and this just makes horizontal well than straight well the hydrops problem take place more easily.For solving the problem of horizontal well hydrops; On conventional water drainage-gas recovery technology basis; Some horizontal well water drainage-gas recovery technologies have also been formed, like horizontal well coiled tubing water drainage-gas recovery technology, split type plunger technology, capillary tube foaming agent filling technology, artificial lift water drainage-gas recovery technology (water pumping gas production of horizontal well electric submersible pump, gaslift water pumping gas production, machine pump drainage hydromining gas etc.).But these technologies exist drawbacks such as scope of application harshness, cost is high, difficulty is operated, maintenance difficulties is big in practical application, for example horizontal well coiled tubing water pumping gas production technology exists construction cost high, and construction is single operation, onset for a long time; Split type plunger and capillary tube foaming agent filling technology can't direct operation in horizontal segment, the horizontal segment hydrops is difficult to timely discharge, discharge opeing efficient is limited; The artificial lift water drainage-gas recovery technology then only is applicable to big displacement, and for medium and small aquifer yield gas well bad adaptability, and the equipment that exists is difficult to be lowered to horizontal segment, the equipment later maintenance maintenance drawback that difficulty is big, cost is high.Simultaneously; Present most of horizontal well water drainage-gas recovery technology equipment needs the later stage to be lowered to; Take out etc. like electric submersible pump, plunger, capillary tube, machine, just this needs earlier the original production gas well to be carried out changing the tubing string operation after the kill-job, kill job certainly will will cause the pollution to the stratum; Not only operating cost is high to change the tubing string operation, also will delay the ordinary production cycle of gas well.
Summary of the invention
One of the object of the invention is: to the deficiency of above-mentioned prior art, under the prerequisite that need not the well killing change tubing string, a kind of simple, cost is low, drainage effect is excellent horizontal well water pumping gas production method is provided.
Two of the object of the invention is: to the water pumping gas production method of one of purpose, a kind of simple in structure, horizontal well water pumping gas production device that reliability is high, practical is provided.
One of the object of the invention is realized through following technical proposals: a kind of horizontal well water pumping gas production method; Said method is that whole gas well is divided into straight well section, inclination section and horizontal segment; Through sealer straight well section and inclination section and horizontal segment are separated; Adopt small diameter tube that the hydrops in inclination section and the horizontal segment is drained into the straight well section, adopt common process that the hydrops of straight well section is discharged.
Two of the object of the invention passes through following technical proposals to be realized: a kind of horizontal well water pumping gas production device; Comprise the oil pipe that is arranged in straight well section, inclination section and horizontal segment; The oil pipe of said straight well section is provided with sealer, and the sealing device is separated straight well section and inclination section and horizontal segment; Be connected with the small diameter tube of diameter less than oil pipe on the said sealer, the tail end of small diameter tube extends to horizontal segment.
The inner core top of said sealer has fishing joint and the joint that veers away, and the inner core bottom has flow nipple joint and the screw thread that is connected small diameter tube, and the flow nipple joint is with connecting flow nipple; The outer wall of said sealer is provided with fixture block and sealing ring.
The tail end of said small diameter tube is connected with sand cap.
Said sand cap is a conical structure.
Said small diameter tube is metal tube or non-metallic pipe.
The direct seat of said sealer is on tube inner wall.
Said sealer seat is on the packoff nipple that tube inner wall presets.
The invention has the beneficial effects as follows: utilize the stratum self-energy; Through small diameter tube the natural gas and the output liquid of horizontal segment is drained into the straight well section; Through conventional water drainage-gas recovery technology the liquid lifting in the straight well section is gone out pit shaft again and arrive ground, form the relay-type water drainage-gas recovery technology with this, this technology can be taken liquid production continuously; Efficient high, good, the reliable and stable of chronicity, avoided liquid in process of production landing get back to the shaft bottom once more and produce the difficult problem of hydrops.That the present invention has is simple to operation, easy to maintenance, cost is low, efficient is high, chronicity is good, reliable and stable, characteristics such as practical.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described further.
Fig. 1 is that the present invention goes into a kind of sketch map that well is installed.
Fig. 2 is a kind of structural representation of sealer among Fig. 1.
Fig. 3 is a kind of user mode sketch map of the present invention.
Fig. 4 is an another kind of user mode sketch map of the present invention.
Code name implication among the figure: 1-production string; 2-oil pipe; 3-small diameter tube; 4-sealer; 5-ground line; 6-seat envelope pipe nipple; 7-sand cap; 8-well head christmas tree; 9-blowout preventer set; 10-coiled tubing; 11-coiled tubing car; 12-instrument veers away; 13-foaming agent filing provision; 14-foaming agent filling pipeline; 15-gas lift equipment; 16-oil jacket linker; 17-high pressure gaslift pipeline; 18-fishing joint; 19-joint veers away; 20-fixture block; 21-sealing ring; 22-flow nipple joint; 23-screw thread; 24-inner core; 25-straight well section; 26-inclination section; 27-horizontal segment.
The specific embodiment
The present invention is divided into straight well section 25, inclination section 26 and horizontal segment 27 with whole gas well; Through sealer 4 straight well section 25 and inclination section 26 and horizontal segment 27 are separated, utilized the stratum self-energy, adopt the small diameter tube 3 that is connected on the sealer 4 that inclination section 26 and horizontal segment 27 interior hydrops are drained into straight well section 25; Adopt common process again; For example foaming water discharge gas producing technology or gaslift lifting water drainage-gas recovery technology are discharged arrival point plane 5 with the hydrops of straight well section 25.
Referring to Fig. 1 and Fig. 2: concrete device of the present invention comprises the oil pipe 2 that is arranged in straight well section 25, inclination section 26 and the horizontal segment 27; Packoff nipple 6 presetting on through oil pipe 2 on the oil pipe 2 of straight well section 25 lower ends is connected with sealer 4; Sealing device 4 is separated straight well section 25 and inclination section 26 and horizontal segment 27; On sealer 4, be connected with the small diameter tube 3 of diameter less than oil pipe 2 with the screw thread mode; Small diameter tube 3 is made (also can be that non-metallic material is processed) by metal material, has certain resistance to compression, tension, temperature resistance and resistance to corrosion, and the tail end of small diameter tube 3 extends to horizontal segment 27.In order to prevent that stratum and pit shaft impurity from stopping up small diameter tube 3, be connected with the sand cap 7 of conical structure at the tail end of small diameter tube 3, guarantee the unimpeded of Liquid Flow passage through sand cap 7.
The concrete structure of above-mentioned sealer 4 is; Inner core 24 tops of sealer 4 have fishing joint 18 and veer away joint 19; Inner core 24 bottoms have flow nipple joint 22 and the screw thread that is connected small diameter tube 3 23, and flow nipple joint 22 is a presetting system, with connecting flow nipple; Through changing the flow nipple of different size, realize the throttling of different in flow rate.The outer wall of sealer 4 is provided with fixture block 20 and sealing ring 21, and fixture block 20 is used to prevent sealer 4 upper and lower displacements, and 21 of sealing rings mainly seal.
Above-mentioned sealer 4 is except through 6 of the packoff nipples that preset are on oil pipe 2, and directly seat is on oil pipe 2 inwalls.
After above-mentioned sealer 4, small diameter tube 3, sand cap 7 are connected; Be connected on the instrument of veering away 12; The instrument 12 that veers away is connected the end of coiled tubing 10 (also can be steel wire), is lowered in the oil pipe 2 under the ground line 5 through blowout preventer set 9 and well head christmas tree 8 by coiled tubing car 11 (also can be winch wire).When being lowered to desired depth, 4 of sealers are encapsulated in the seat envelope pipe nipple 6 that presets on the oil pipe 2, treat seat secure solid after; Carry coiled tubing 10 in the jarring also; Make instrument that veers away 12 and down-hole sealer 4 break away from, carry coiled tubing 10 in the continuation, make the instrument of veering away 12 all propose well head christmas tree 8.
Referring to Fig. 3: during gas production, the natural gas of output and formation water accumulate in the horizontal segment 27 and inclination section 26 in shaft bottom, rely on the stratum self-energy; Natural gas is discharged through small diameter tube 3, and natural gas is when discharging, because the size of small diameter tube 3 is little; Sentence high flow rate at small diameter tube 3 and pass through, high flow rate through in take formation water and pass through together, in the oil pipe 2 of the straight well section 25 that is lifted to sealer 4 tops; Ground is through foaming agent filing provision 13 (foaming agent filling pipeline 14 is connected on the well head christmas tree 8) filling foaming agent in oil pipe 2; Foaming agent fully mixes with straight well section 25 interior natural gas, formation waters, and formation water is bubbled, and under the mobilization of natural gas; Through well head christmas tree 8, drain into ground.
Referring to Fig. 4: during gas production, in adopting above-mentioned foaming water discharge gas producing technology lifting straight well section gas-liquid, can also adopt the gas-liquid in the gaslift lifting water drainage-gas recovery technology lifting straight well section.Specifically be that the natural gas of output and formation water accumulate in the horizontal segment 27 and inclination section 26 in shaft bottom, rely on the stratum self-energy; Natural gas is discharged through small diameter tube 3, and natural gas is when discharging, because the size of small diameter tube 3 is little; Sentencing high flow rate at small diameter tube 3 passes through; High flow rate through in take formation water and pass through together, in the oil pipe 2 of the straight well section 25 that is lifted to sealer 4 tops, ground adopts gas lift equipment 15 through high pressure gaslift pipeline 17 gas to be injected in the production string 1; The gas that injects gets in the oil pipe 2 through the oil jacket linker 16 that is connected on the straight well section oil pipe 2; Oil jacket linker 16 is gas lift valve (also can be sliding sleeve), and the gas of injection mixes with the natural gas of gas well output and gas well output formation water is passed through well head christmas tree 8, drains into ground.
Claims (8)
1. horizontal well water pumping gas production method; It is characterized in that: said method is that whole gas well is divided into straight well section, inclination section and horizontal segment; Through sealer straight well section and inclination section and horizontal segment are separated; Adopt small diameter tube that the hydrops in inclination section and the horizontal segment is drained into the straight well section, adopt common process that the hydrops of straight well section is discharged.
2. horizontal well water pumping gas production device; Comprise the oil pipe (2) that is arranged in straight well section (25), inclination section (26) and horizontal segment (27); It is characterized in that: the oil pipe (2) of said straight well section (25) is provided with sealer (4), and sealing device (4) is separated straight well section (25) and inclination section (26) and horizontal segment (27); Be connected with the small diameter tube (3) of diameter less than oil pipe (2) on the said sealer (4), the tail end of small diameter tube (3) extends to horizontal segment (27).
3. according to the said horizontal well water pumping gas production of claim 2 device; It is characterized in that: inner core (24) top of said sealer (4) has fishing joint (18) and the joint that veers away (19); The inner core bottom has flow nipple joint (22) and the screw thread that is connected small diameter tube (3) (23), and flow nipple joint (22) is with connecting flow nipple; The outer wall of said sealer (4) is provided with fixture block (20) and sealing ring (21).
4. according to the said horizontal well water pumping gas production of claim 2 device, it is characterized in that: the tail end of said small diameter tube (3) is connected with sand cap (7).
5. according to the said horizontal well water pumping gas production of claim 4 device, it is characterized in that: said sand cap (7) is a conical structure.
6. according to the said horizontal well water pumping gas production of claim 2 device, it is characterized in that: said small diameter tube (3) is metal tube or non-metallic pipe.
7. according to the said horizontal well water pumping gas production of claim 2 device, it is characterized in that: the direct seat of said sealer (4) is on oil pipe (2) inwall.
8. according to the said horizontal well water pumping gas production of claim 2 device, it is characterized in that: said sealer (4) seat is on the packoff nipple (6) that oil pipe (2) inwall presets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210326925.6A CN102817594B (en) | 2012-09-06 | 2012-09-06 | Horizontal well water pumping gas production method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210326925.6A CN102817594B (en) | 2012-09-06 | 2012-09-06 | Horizontal well water pumping gas production method and device |
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| CN102817594A true CN102817594A (en) | 2012-12-12 |
| CN102817594B CN102817594B (en) | 2015-08-26 |
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| CN201210326925.6A Active CN102817594B (en) | 2012-09-06 | 2012-09-06 | Horizontal well water pumping gas production method and device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104504604A (en) * | 2014-12-12 | 2015-04-08 | 中国地质大学（武汉） | Method for qualifying liquid loading of gas well |
| CN107143296A (en) * | 2017-05-09 | 2017-09-08 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | A kind of horizontal gas well negative pressure drags for sand method, horizontal gas well negative pressure and drags for sand system |
| CN111042768A (en) * | 2018-10-12 | 2020-04-21 | 中国石油化工股份有限公司 | Injection device |
| CN111853348A (en) * | 2020-08-28 | 2020-10-30 | 西安长庆科技工程有限责任公司 | Pipeline interpolation method for improving liquid carrying capacity of low-lying part of gas collecting pipeline |
| CN112696343A (en) * | 2020-12-30 | 2021-04-23 | 西南石油大学 | Shale gas horizontal well plunger lifting drainage gas production underground device and working method |
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| CN102536172A (en) * | 2012-02-23 | 2012-07-04 | 石云夫 | Sectional production tubular pile for horizontal well |
| CN102644442A (en) * | 2012-04-25 | 2012-08-22 | 山东立鑫石油机械制造有限公司 | Ultra-viscous crude oil injection-production integrated technique tubular pile |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104504604A (en) * | 2014-12-12 | 2015-04-08 | 中国地质大学（武汉） | Method for qualifying liquid loading of gas well |
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| CN107143296A (en) * | 2017-05-09 | 2017-09-08 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | A kind of horizontal gas well negative pressure drags for sand method, horizontal gas well negative pressure and drags for sand system |
| CN107143296B (en) * | 2017-05-09 | 2019-11-22 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | A kind of horizontal gas well negative pressure fishing sand method, horizontal gas well negative pressure fish out sand system |
| CN111042768A (en) * | 2018-10-12 | 2020-04-21 | 中国石油化工股份有限公司 | Injection device |
| CN111853348A (en) * | 2020-08-28 | 2020-10-30 | 西安长庆科技工程有限责任公司 | Pipeline interpolation method for improving liquid carrying capacity of low-lying part of gas collecting pipeline |
| CN112696343A (en) * | 2020-12-30 | 2021-04-23 | 西南石油大学 | Shale gas horizontal well plunger lifting drainage gas production underground device and working method |
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| CN102817594B (en) | 2015-08-26 |
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