CN102031949A - Gas lift method of combined ball plug for drainage and gas production of oil and gas well - Google Patents
Gas lift method of combined ball plug for drainage and gas production of oil and gas well Download PDFInfo
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- CN102031949A CN102031949A CN2010105680770A CN201010568077A CN102031949A CN 102031949 A CN102031949 A CN 102031949A CN 2010105680770 A CN2010105680770 A CN 2010105680770A CN 201010568077 A CN201010568077 A CN 201010568077A CN 102031949 A CN102031949 A CN 102031949A
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- oil pipe
- gas lift
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- bulb stopper
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Abstract
The invention provides a gas lift method of a combined ball plug for drainage and gas production of an oil and gas well, which comprises a U-shaped double tubing string ball plug lift structure, a packer (4), a bottom pipeline (7) and a bottom gas lift valve device (6). The gas lift method of the combined ball plug has simple structure and high reliability and is suitable for most drainage and gas production wells. The gas lift valve is mounted at the bottom to use stratum energy adequately so that the lifting efficiency is higher and the production effect is good.
Description
Technical field
The present invention relates to a kind of liquid discharging gas producing method of oil gas well, particularly a kind of combined type pig gas lift method.
Background technology
The gas reservoir of water, gas condensate reservoir are very general at home and abroad at the bottom of the limit, in recovery process, along with the increase of recovery percent of reserves, often are accompanied by intrusion, formation and the output of Bian Dishui, condensate.The formation water of condensation water, condensate, intrusion is very big to gas extraction harm.Along with the reduction gradually of stratum energy, partially liq can't be carried into well head, and a large amount of liquid is assembled in the shaft bottom, forms the gas well hydrops.After the hydrops of shaft bottom,, producing pressure differential is reduced, reduce the production capacity of gas well the back pressure that increases payzone.Along with the reduction of gas well output, the further variation of fluid-carrying capability, shaft bottom hydrops meeting pernicious increase within a short period of time causes the gas well stop-spraying at last, promptly is commonly called as " gas well water logging ".For the gas well of hydrops, select rational water pumping gas production method, for the lasting exploitation of gas reservoir, prolong gas well production life of well very important.Common water pumping gas production method mainly contains at present, and row, conventional gaslift, preferred tubing string, electric submersible pump, plunger lift, pig gas lift etc. are taken out, steeped to machine.Some gas fields in present China western part, because buried depth is darker, after hydrops occurring, its producing fluid level is lower, conventional water pumping gas production method often can't realize the water pumping gas production of this class deep-well smoothly, need badly to find and a kind ofly can have higher lifting efficiency, possess the method for certain depth of setting and high reliability simultaneously again.
Conventional gaslift method relies on the gases at high pressure that inject into well from ground to produce fluid mixing pit shaft with oil reservoir, utilizes the expansion of gas that the mixed liquor density in the pit shaft is reduced, and the crude oil that flow in the well is given rise to ground.The characteristics of conventional gaslift are the reliability height, yet along with the increase lifting efficiency of the degree of depth is on the low side, and the lifting degree of depth is limited.The pig gas lift method is annotated by compressor unit, ground injecting gas pipeline, down-hole and is adopted the closed system that 3 subsystems of pipeline are composed in series, wherein the down-hole is annotated and is adopted pipeline employing U type dual-tubing string lifting structures, the dual-tubing string internal diameter equates in the flow process, couple together with air and liquid mixer in the shaft bottom, wherein one is gas injection and airlifting ball whereabouts oil pipe, and another root is the bulb stopper lifting oil pipe.The characteristics of pig gas lift are the energy that relies on the ground compressor fully, the lifting efficiency height, however depth of setting is limited, in case will increase the lifting degree of depth, needs powerful ground compression device.Present combined type pig gas lift method is mainly at the design of liquid discharging gas producing well, and its groundwork principle is to adopt the method for " the gaslift combination of just arranging in pairs or groups ", makes full use of stratum energy and realizes the efficient discharge opeing of gas well.Adopt the system effectiveness of liquid discharging gas producing well of above-mentioned pig gas lift method on the low side, stratum energy can not get sufficient utilization, depth of setting reliability limited, system is not high, pig gas lift is to the strictness of compressor conditional request simultaneously, be difficult for satisfying condition of work, thereby body economy, bad adaptability.When solving the deep-well water pumping gas production, can improve lifting efficiency, when can under accession go into the degree of depth again, do not increase the starting pressure of ground compressor, be the focus of studying at present.
Summary of the invention
The object of the present invention is to provide a kind of combined type pig gas lift method, can realize efficient, the reliable liquid discharging gas producing of liquid discharging gas producing well.Combined type pig gas lift method of the present invention is simple in structure, and the reliability height is fit to most liquid discharging gas producing well, and the bottom is installed gas lift valve and made full use of stratum energy, has higher lifting efficiency and good production effect.
The invention provides a kind of combined type pig gas lift equipment, it comprises U type dual-tubing string bulb stopper lifting structures, packer 4, bottom oil pipe 7 and bottom gas lift valve device 6, it is characterized in that: bottom gas lift valve device 6 is installed on the oil pipe 7 of bottom, 4 of packers are enclosed in a certain position on the production casing 5, bottom gas lift valve device 6, form the gaslift hoisting system of a sealing between bottom oil pipe 7 and the packer 4, U type dual-tubing string bulb stopper lifting structures is formed by bulb stopper lifting oil pipe 8 and gas injection and airlifting ball whereabouts oil pipe 9 in packer 4 tops, is connected by air and liquid mixer 10 between bottom oil pipe 7 and the U type dual-tubing string bulb stopper lifting structures.
Described packer 4 can be divided into the tubing string that produces oil the U type dual-tubing string bulb stopper lifting structures and the bottom oil pipe 7 of bulb stopper lifting oil pipe 8 and gas injection and airlifting ball whereabouts oil pipe 9 compositions.
The invention provides a kind of combined type pig gas lift method that is used for the gas production of oil gas well array liquid of using the said equipment, be characterised in that, fluid in the stratum is by flowing into shaft bottom 3 in the preforation tunnel 2, gas is at packer 4, form high pressure between shaft bottom 3 and the production casing 5, when pressure reaches a certain limit, gases at high pressure then can enter in the oil pipe 7 of bottom by bottom gas lift valve device 6, gases at high pressure mix the back and rise and arrive bulb stopper lifting oil pipe 8 with fluid in the bottom oil pipe 7,12 pairs of gaslift beads of gas injecting pipe 16 carry out supercharging, enter gas injection and airlifting ball whereabouts oil pipe 9 by ball-throwing apparatus 11, enter bulb stopper lifting oil pipe 8 by air and liquid mixer 10 then, gaslift bead 16 and the fluid well head production tree 13 of flowing through, flow to ball-collecter 14, gaslift bead 16 is separated in the ball-collecter 14, fluid flows out with export pipeline 15, and ball-throwing apparatus 11 continues to drop into bead 16, and whole process is gone round and begun again.
According to combined type pig gas lift method of the present invention, can make full use of stratum energy, realize knockdown gaslift liquid discharging gas producing up and down.Structural principle of the present invention is simple, and the reliability height fully combines the advantage and the strong point of two kinds of gaslift methods, is applicable to most liquid discharging gas producing well, and this method can make full use of the land productivity stratum energy, realizes lifting efficient, high reliability.
Description of drawings
Fig. 1 is the schematic diagram of combined type pig gas lift equipment, wherein:
1. payzone, 2. preforation tunnel, 3. shaft bottom, 4. packer, 5. production casing, 6. bottom gas lift valve device, 7. bottom oil pipe, 8. bulb stopper lifting oil pipe, 9. airlifting ball whereabouts oil pipe, 10. air and liquid mixer, 11. ball-throwing apparatus, 12. gas injecting pipes, 13. well head production tree, 14. ball-collecter, 15. export pipelines, 16. gaslift beads.
The specific embodiment
The present invention will be described below in conjunction with embodiment and accompanying drawing:
Combined type pig gas lift device structure schematic diagram shown in Figure of description, this equipment comprise U type dual-tubing string bulb stopper lifting structures, packer 4, bottom oil pipe 7 and bottom gas lift valve device 6.Completion mode according to gas well, bottom gas lift valve device 6 is installed on the oil pipe 7 of bottom, 4 of packers are enclosed in a certain position on the production casing 5, form the gaslift hoisting system of a sealing between bottom gas lift valve device 6, bottom oil pipe 7 and the packer 4, U type dual-tubing string bulb stopper lifting structures is formed by bulb stopper lifting oil pipe 8 and gas injection and airlifting ball whereabouts oil pipe 9 in packer 4 tops, is connected by air and liquid mixer 10 between bottom oil pipe 7 and the U type dual-tubing string bulb stopper lifting structures.Ground installation mainly comprises ball-throwing apparatus 11, gas injecting pipe 12, well head production tree 13, ball-collecter 14 and export pipeline 15.Ground installation and combined type pig gas lift equipment connect into an integral body by gaslift bead 16.Combined type pig gas lift method is characterized in that: this method has been gathered two kinds of gaslift methods, utilizes packer that production system is divided into upper and lower two parts, utilizes stratum energy to realize efficient lifting.
The course of work of the present invention is: the fluid in the stratum is by flowing into shaft bottom 3 in the preforation tunnel 2, gas is at packer 4, form high pressure between shaft bottom 3 and the production casing 5, when pressure reaches a certain limit, gases at high pressure then can enter in the oil pipe 7 of bottom by gas lift valve 6, gases at high pressure mix the back and rise and arrive bulb stopper lifting oil pipe 8 with fluid in the oil pipe 7,12 pairs of gaslift beads of gas injecting pipe 16 carry out supercharging, enter gas injection and airlifting ball whereabouts oil pipe 9 by ball-throwing apparatus 11, enter bulb stopper lifting oil pipe 8 by air and liquid mixer 10 then, gaslift bead 16 and the fluid well head production tree 13 of flowing through, flow to ball-collecter 14, gaslift bead 16 is separated in the ball-collecter 14, fluid flows out with export pipeline 15, and ball-throwing apparatus 11 continues to drop into bead 16, and whole process is gone round and begun again.
Example 1:
The shaft bottom hydrops takes place in the gas well shaft bottom, the main component of supposing liquid be water, oil then density of liquid be 800kg/m
3, acceleration of gravity is 10m
2/ s, the rated operating pressure of ground compressor is 35Mpa, and the energy of damping force consumption accounts for 20% of power output, and the regulation rated operating pressure system of being starts needed maximum pressure, then for the pig gas lift of routine, Zui Da depth of setting is in theory:
H
1=
P n ×
η/ρg=35×10
6×0.8/800/10=3500(m)
After the box-like pig gas lift method of set of applications, form separate chamber between bottom gas lift valve and the packer, along with the continuous increase of the gas pressure in the chamber, gas lift valve is opened one by one, and gas enters in the oil pipe, reduces the density of mixing material.Supposing to mix the back density of liquid is 650kg/m
3, keep other parameter constants, for combined type pig gas lift method, Zui Da depth of setting is in theory:
H
2=
P n ×
η/ρg=35×10
6×0.8/650/10≈4308(m)
According to example 1 as can be known, after the box-like pig gas lift method of set of applications, the depth of setting of pig gas lift significantly increases.
Example 2:
The shaft bottom hydrops takes place in the gas well shaft bottom, the main component of supposing liquid be water, oil then density of liquid be 800kg/m
3, acceleration of gravity is 10m
2/ s, the energy of damping force consumption accounts for 20% of power output, and the producing fluid level of hydrops is at 3000m, and the depth of setting that requires pig gas lift is at least at 3500m, and for the pig gas lift of routine, the pressure that starting this system needs is at least:
P n1=
ρgh/η=800×10×3500/0.8=35(Mpa)
After the box-like pig gas lift method of set of applications, gas enters in the oil pipe by gas lift valve, reduces the density of mixing material, and supposing to mix the back density of liquid is 650kg/m
3The depth of setting that requires pig gas lift is at least at 3500m, and for the combined type pig gas lift, the pressure that starting this system needs is at least:
P n2=
ρgh/η=650×10×3500/0.8≈28.44(Mpa)
According to example 2 as can be known, after the box-like pig gas lift method of set of applications, under the situation of same depth of setting,,, and improved lifting efficiency so the required starting pressure of pig gas lift significantly reduces because the conventional gaslift in bottom has utilized the energy of annular space gas fully.
Claims (3)
1. combined type pig gas lift equipment, it comprises U type dual-tubing string bulb stopper lifting structures, packer (4), bottom oil pipe (7) and bottom gas lift valve device (6), it is characterized in that: bottom gas lift valve device (6) is installed on the bottom oil pipe (7), packer (4) seat is enclosed in production casing (5) and goes up a certain position, bottom gas lift valve device (6), form the gaslift hoisting system of a sealing between bottom oil pipe (7) and the packer (4), U type dual-tubing string bulb stopper lifting structures is formed by bulb stopper lifting oil pipe (8) and gas injection and airlifting ball whereabouts oil pipe (9) in packer (4) top, is connected by air and liquid mixer (10) between bottom oil pipe (7) and the U type dual-tubing string bulb stopper lifting structures.
2. combined type pig gas lift equipment according to claim 1, it is characterized in that: described packer (4) seat is enclosed in production casing (5) and goes up a certain position, and packer (4) tubing string that will produce oil is divided into bulb stopper lifting oil pipe (8) and U type dual-tubing string bulb stopper lifting structures and the bottom oil pipe (7) of gas injection with airlifting ball whereabouts oil pipe (9) composition.
3. combined type pig gas lift method that is used for the gas production of oil gas well array liquid of using claim 1 or 2 described equipment, be characterised in that: the fluid in the stratum is by flowing into shaft bottom (3) in the preforation tunnel (2), gas is in packer (4), form high pressure between shaft bottom (3) and the production casing (5), when pressure reaches a certain limit, gases at high pressure then can enter in the bottom oil pipe (7) by bottom gas lift valve device (6), gases at high pressure mix the back and rise and arrive bulb stopper lifting oil pipe (8) with fluid in the bottom oil pipe (7), gas injecting pipe (12) carries out supercharging to gaslift bead (16), enter gas injection and airlifting ball whereabouts oil pipe (9) by ball-throwing apparatus (11), enter bulb stopper lifting oil pipe (8) by air and liquid mixer (10) then, gaslift bead (16) and the fluid well head production tree (13) of flowing through, flow to ball-collecter (14), gaslift bead (16) is separated in the ball-collecter (14), fluid flows out with export pipeline (15), ball-throwing apparatus (11) continues to drop into bead (16), and whole process is gone round and begun again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010568077 CN102031949B (en) | 2010-12-01 | 2010-12-01 | Gas lift method of combined ball plug for drainage and gas production of oil and gas well |
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|---|---|---|---|
| CN 201010568077 CN102031949B (en) | 2010-12-01 | 2010-12-01 | Gas lift method of combined ball plug for drainage and gas production of oil and gas well |
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|---|---|
| CN102031949A true CN102031949A (en) | 2011-04-27 |
| CN102031949B CN102031949B (en) | 2013-07-03 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573224A (en) * | 2013-10-21 | 2014-02-12 | 联合石油天然气投资有限公司 | Technology for fishing oil under pressure |
| CN104794980A (en) * | 2015-05-03 | 2015-07-22 | 辽宁石油化工大学 | Pig-lift teaching demonstration model |
| CN105672964A (en) * | 2016-01-18 | 2016-06-15 | 景丽百合 | U-shaped pipe gas lift liquid collection and drainage method and device |
| CN105863592A (en) * | 2016-05-27 | 2016-08-17 | 中国石油天然气股份有限公司 | Oil extracting method and device capable of reducing underground gas-oil ratio and improving pump efficiency |
| CN108252685A (en) * | 2016-12-28 | 2018-07-06 | 中国石油天然气股份有限公司 | A kind of extension gas lift method of permanent type completion tubular column |
| CN108343408A (en) * | 2017-01-24 | 2018-07-31 | 中国石油天然气股份有限公司 | Water drive gas reservoir recovery method |
| CN108386163A (en) * | 2018-03-29 | 2018-08-10 | 中国海洋石油集团有限公司 | A kind of gaslift induced flow technique and gaslift induced flow system |
| CN109477370A (en) * | 2017-03-27 | 2019-03-15 | 沙特阿拉伯石油公司 | Method and apparatus for stablizing the gas/liquid flowing in vertical pipeline |
| CN111577245A (en) * | 2020-05-19 | 2020-08-25 | 成都佳广知科技有限公司 | Intelligent water lifting gas production system and method for natural gas well |
| CN112253060A (en) * | 2020-10-19 | 2021-01-22 | 中建四局土木工程有限公司 | Gap gas lift liquid drainage gas production control method and system |
| CN112324401A (en) * | 2020-10-15 | 2021-02-05 | 中国地质大学（武汉） | Near-density ball plug gas lift simulation experiment lifting system and efficiency evaluation method |
| CN116971749A (en) * | 2023-09-23 | 2023-10-31 | 西南石油大学 | Underground ground integrated liquid drainage system and method |
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Non-Patent Citations (1)
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573224A (en) * | 2013-10-21 | 2014-02-12 | 联合石油天然气投资有限公司 | Technology for fishing oil under pressure |
| CN104794980A (en) * | 2015-05-03 | 2015-07-22 | 辽宁石油化工大学 | Pig-lift teaching demonstration model |
| CN105672964B (en) * | 2016-01-18 | 2020-04-17 | 景丽百合 | U-shaped pipe gas-lift liquid extraction and drainage device |
| CN105672964A (en) * | 2016-01-18 | 2016-06-15 | 景丽百合 | U-shaped pipe gas lift liquid collection and drainage method and device |
| CN105863592A (en) * | 2016-05-27 | 2016-08-17 | 中国石油天然气股份有限公司 | Oil extracting method and device capable of reducing underground gas-oil ratio and improving pump efficiency |
| CN105863592B (en) * | 2016-05-27 | 2018-08-10 | 中国石油天然气股份有限公司 | Reduce oil production method and device that underground gas-oil ratio improves pump efficiency |
| CN108252685A (en) * | 2016-12-28 | 2018-07-06 | 中国石油天然气股份有限公司 | A kind of extension gas lift method of permanent type completion tubular column |
| CN108252685B (en) * | 2016-12-28 | 2020-09-08 | 中国石油天然气股份有限公司 | Extension gas lift method of permanent well completion pipe string |
| CN108343408A (en) * | 2017-01-24 | 2018-07-31 | 中国石油天然气股份有限公司 | Water drive gas reservoir recovery method |
| CN109477370A (en) * | 2017-03-27 | 2019-03-15 | 沙特阿拉伯石油公司 | Method and apparatus for stablizing the gas/liquid flowing in vertical pipeline |
| CN108386163A (en) * | 2018-03-29 | 2018-08-10 | 中国海洋石油集团有限公司 | A kind of gaslift induced flow technique and gaslift induced flow system |
| CN111577245A (en) * | 2020-05-19 | 2020-08-25 | 成都佳广知科技有限公司 | Intelligent water lifting gas production system and method for natural gas well |
| CN111577245B (en) * | 2020-05-19 | 2023-03-28 | 成都佳广知科技有限公司 | Intelligent water lifting gas production system and method for natural gas well |
| CN112324401A (en) * | 2020-10-15 | 2021-02-05 | 中国地质大学（武汉） | Near-density ball plug gas lift simulation experiment lifting system and efficiency evaluation method |
| CN112324401B (en) * | 2020-10-15 | 2021-09-24 | 中国地质大学（武汉） | Near-density ball plug gas lift simulation experiment lifting system and efficiency evaluation method |
| CN112253060A (en) * | 2020-10-19 | 2021-01-22 | 中建四局土木工程有限公司 | Gap gas lift liquid drainage gas production control method and system |
| CN112253060B (en) * | 2020-10-19 | 2023-12-29 | 中建四局土木工程有限公司 | Intermittent gas lift liquid drainage gas production control method and system |
| CN116971749A (en) * | 2023-09-23 | 2023-10-31 | 西南石油大学 | Underground ground integrated liquid drainage system and method |
| CN116971749B (en) * | 2023-09-23 | 2024-02-09 | 西南石油大学 | Underground ground integrated liquid drainage system and method |
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