CN103306643A - Drainage gas recovery device and method - Google Patents
Drainage gas recovery device and method Download PDFInfo
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- CN103306643A CN103306643A CN2013102882346A CN201310288234A CN103306643A CN 103306643 A CN103306643 A CN 103306643A CN 2013102882346 A CN2013102882346 A CN 2013102882346A CN 201310288234 A CN201310288234 A CN 201310288234A CN 103306643 A CN103306643 A CN 103306643A
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Abstract
The invention relates to a drainage gas recovery device and method. The method comprises the following steps of laying a pressure gauge down to the bottom of a well through a first oil pipe to measure the static pressure and the liquid level at the bottom of the well, selecting a matched well shutting device according to the pressure and setting the pressure value of a plug and a gas lift valve; dismantling an original well head, perfecting the drainage gas recovery device on the basis of existence of the original well mouth device; pressurizing a second oil pipe with nitrogen and opening the plug when the pressure of the second oil pipe reaches an opening pressure of the plug; and continuing pressurizing the second oil pipe with nitrogen and opening the gas lift valve step by step when the pressure of the second oil pipe reaches an opening pressure of the gas lift valve to drain out liquid inside the shaft and at the bottom of the well until the flowing production of natural gas is achieved. The drainage gas recovery device and method has the advantage of being capable of draining out the fluid inside the oil pipes by opening the gas lift valve through multiple flowing inducing of nitrogen lift to reduce slippage loss greatly and water accumulation, thereby prolonging the production cycle of the gas well. Besides, the drainage gas recovery device and method is easy to operate, low in cost and safe and reliable in sealing.
Description
Technical field
The present invention relates to gas production field, oil field (in the energy extraction), in particular to a kind of water pumping gas production device and method.
Background technology
Natural gas is the imflammable gas that is stored in depths, the end, ground, is a kind of cleaning, convenience, fuel efficiently, also is a kind of important chemical material, has higher economic value.
Existing natural gas harvester mainly comprises first four-way that is connected with down-hole casing, the first interior oil pipe of first tubing hanger and down-hole casing that is connected in first four-way is connected, utilize strata pressure to pass through first oil pipe and directly the gas of down-hole is sprayed outer wellhead, but in actual production, a large amount of formation waters mixes with natural gas, when gas production is higher, and flow velocity is when being higher than critical point in the oil pipe, and gas can take water to ground; Along with gas well exploitation time lengthening, the residual recoverable reserves of mine gas reduces gradually, strata pressure, bottom pressure, well head pressure all constantly reduce, flow velocity subcritical point in the oil pipe, the part neatly is taken off to pit shaft, and the pit shaft hydrops acquires a certain degree, form water logging, gas can't be got rid of thus, thereby causes the underproduction, even occurs stopping production.
Be the requirements such as flow velocity that reduce wellhead back pressure, improve output pressure, improve Particle in Vertical Pipe Flow, prior art only changes original oil pipe into the little oil pipe of band gas lift valve and produces, so just must go up workover rig, extract former well casing post, following little oil pipe not only causes the rehabilitation cost height, and kill-job must cause well killing fluid to be missed to the stratum in a large number, and is very big to formation damage, even can't return to normal production after repairing.Prior art is also carried out gas production by coiled tubing water pumping gas production (speed tubing string method) in addition, the greatest problem of this technology is when strata pressure continues to drop to a certain degree with production, shaft bottom hydrops amount is on the increase, because coiled tubing can't connect gas lift valve, the shaft bottom forms new water logging, hydrops can't be discharged, and causes gas to discharge from air collecting pipe and causes stopping production.
Summary of the invention
The object of the present invention is to provide a kind of water pumping gas production device and method, to solve the above problems.
A kind of water pumping gas production device is provided in the embodiment of the invention, comprise first four-way, first oil pipe and sleeve pipe, the first oil pipe intercalation is in sleeve pipe, the bottom of first four-way is connected with sleeve pipe, first oil pipe, first tubing hanger interior with being stuck in first four-way is connected, the top of first four-way is connected with second four-way, card has second tubing hanger in second four-way, the second tubing hanger bottom connects second oil pipe, second oil pipe vertically passes second four-way, first four-way successively, and intercalation forms airtight toroidal cavity between first oil pipe and second oil pipe in first oil pipe; Second oil pipe that is positioned at the down-hole is fixedly connected with some grades of gas lift valves, and the second oil pipe bottom is connected with blanking plug, and the blanking plug below is connected with the blanking plug recycling bin that is used with blanking plug.
A kind of water pumping gas production method also is provided in the embodiment of the invention, and this method may further comprise the steps:
1) pressure gauge is transferred to the shaft bottom by first oil pipe, measure static bottom-hole pressure and liquid level, according to the shut-in well device of pressure selection pressure ratings match and set blanking plug and the opening pressure value of gas lift valve;
2) remove former wellhead assembly, and improve gas producing device on the basis that former wellhead assembly exists;
3) after gas producing device is installed, suppress in first oil pipe with nitrogen, when force value reaches the opening pressure of blanking plug, open blanking plug;
4) continue to suppress in first oil pipe with nitrogen, when pressure reaches the opening pressure of gas lift valve, open gas lift valve step by step, with in the pit shaft, the liquid in shaft bottom discharges, till natural gas is by shaft bottom blowing production.
Beneficial effect of the present invention: the present invention changes the cross-sectional area of flow string under the protection of safety device, descends in output but keeps on the flow velocity basis of invariable, can reduce the slippage loss significantly, reduces shaft bottom ponding, thereby prolongs the gas well production cycle; In process of production, the airtight annular space gas production that can utilize first oil pipe and second oil pipe to form also can utilize the little oil pipe gas production.Prolongation along with the production time, when strata pressure drops to a certain degree, output reduces gradually, when the shaft bottom water accumulating volume increases, the present invention utilizes repeatedly induced flow of nitrogen gaslift, when reaching certain pressure, gas lift valve in second oil pipe is opened, and the liquid in shaft bottom is discharged, thereby realize circulation gaslift liquid discharging gas producing, simple to operate, the with low cost and sealingly secure of this invention, reliably simultaneously to the formation damage minimum, and can be with the ponding emptying of shaft bottom and near wellbore zone.
Description of drawings
Fig. 1 is the structural representation of the described a kind of water pumping gas production device of the embodiment of the invention;
Fig. 2 is the installation sectional view of the medium and small four-way of the described a kind of water pumping gas production device of the embodiment of the invention, triple ram preventer, annular blowout preventer;
Fig. 3 is the flow chart of the described a kind of water pumping gas production method of the embodiment of the invention.
Among Fig. 1,
1, triple ram preventer; 2, second four-way; 3, first four-way; 4, gas lift valve; 5, sleeve pipe; 6, first oil pipe; 7, second oil pipe; 8, blanking plug; 9, blanking plug recycling bin; 10, annular blowout preventer; 11, slips flashboard; 12, partly seal flashboard; 13, shear ram.
The specific embodiment
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
The design of gas lift valve is mounted in the valve on second oil pipe, and gas lift valve is the important tool of implementing the gaslift method, and the effect of gas lift valve comprises: the gas injection passage during the gaslift operation; The switch of injecting hole on the lifting tubing string; With lower startup gas injection pressure, the liquid level in the well is down to desired depth, and on this degree of depth, produces by expected yield with the required gas injection pressure of operate as normal; Can change the gas injection degree of depth neatly, to adapt to the variation of gas well fluid supply capacity; Utilize gas lift valve to change the lifting degree of depth, increase the gas well producing pressure differential, remove with the cleaning oil reservoir and pollute; Gaslift is the same with other artificial artificial lifting way, can set up required flowing bottomhole pressure (FBHP), reaches the lifting rate of expection.
The effect of blanking plug and blanking plug recycling bin: when borehole pressure was too high, blanking plug stopped up the passage of second oil pipe, and borehole pressure is more high, stopped up more tight; When forehand is depressed into rated pressure in second oil pipe, piston in the blanking plug can be squeezed in the blanking plug recycling bin, after the piston of blanking plug entered the blanking plug recycling bin, the blanking plug recycling bin was communicated with second oil pipe, easy to operate, the design of blanking plug has guaranteed the safety of device when operation.
This device also comprises triple ram preventer 1 and annular blowout preventer 10, and described triple ram preventer is connected with the second four-way top, and the bottom of described annular blowout preventer is connected by flange with the top of described pressure control device.
Described triple ram preventer comprises slips flashboard 11, partly seals flashboard 12 and shear ram 13, the effect of triple ram preventer: when the annular space pressure of first oil pipe and second oil pipe is higher than the required pressure of safety operation, partly seal flashboard and close half envelope, the assurance natural gas is non-leakage, start the slips flashboard simultaneously and block second oil pipe, guarantee the last string of second oil pipe; When the annular space pressure of first oil pipe and second oil pipe is higher than the required pressure of safety operation and thinks must stop the second oil pipe operation down the time, start shear ram, cut off second oil pipe and second oil pipe is fallen in the well, close the total valve of gathering on the four-way, thereby guaranteed the safe, reliable of this device operation.The design of annular blowout preventer has guaranteed the closure of annular space between second oil pipe and first oil pipe, has guaranteed the normal pipe down of device, and handling safety is reliable.
Be provided with second oil pipe in first oil pipe of this device, in process of production, can select to utilize the annular space production that is formed by first oil pipe and second oil pipe, also can select directly to be produced by little oil pipe, along with the prolongation of gas production production time, when strata pressure drops to a certain degree, the hydrops amount is continued in the shaft bottom to be increased, and utilizes nitrogen gaslift induced flow, and the gas lift valve that is provided with in second oil pipe is opened, the liquid in shaft bottom is discharged, thereby realize circulation gaslift liquid discharging gas producing.This installs at simple to operate, with low cost, sealingly secure, reliably simultaneously to the formation damage minimum, and can be with the ponding emptying of shaft bottom and near wellbore zone.
1) pressure gauge is transferred to the shaft bottom by first oil pipe, measure static bottom-hole pressure and liquid level, according to the shut-in well device of pressure selection pressure ratings match and set blanking plug and the opening pressure value of gas lift valve;
2) remove former wellhead assembly, and improve gas producing device on the basis that former wellhead assembly exists;
3) after gas producing device is installed, suppress in second oil pipe with nitrogen, when force value reaches the opening pressure of blanking plug, open blanking plug;
4) continue to suppress in second oil pipe with nitrogen, when pressure reaches the opening pressure of gas lift valve, open gas lift valve step by step, with in the pit shaft, the liquid in shaft bottom discharges, till natural gas is by shaft bottom blowing production.
Preferably, in the step 1), if detect in first oil pipe pressure is arranged, but insufficient pressure is so that the natural gas blowing uses steel wire to send into first oil pipe bottom and to stop up first oil pipe with the blanking plug that first oil pipe matches.Bleed off the residual pressure in first oil pipe, enter step 2 then); If no pressure in first oil pipe then directly enters step 2).
Further, step 2) in, remove former wellhead assembly, and improve gas producing device on the basis that former wellhead assembly exists and may further comprise the steps:
1) at the top of original first four-way second four-way, triple ram preventer and annular blowout preventer are installed successively from down to up;
2) second oil pipe that will have a multistage gas lift valve successively by annular blowout preventer, triple ram preventer, second four-way and the first four-way intercalation in described first oil pipe;
3) blanking plug recycling bin, blanking plug are transferred successively to the second oil pipe bottom;
4) remove triple ram preventer, ring packing device successively, by the second four-way top second tubing hanger is installed then, and make bottom and the second oil pipe snapping of second tubing hanger.
The advantage of gas production method of the present invention comprise following some:
1) gas production method provided by the present invention can reduce the slippage loss significantly, reduces shaft bottom ponding, can prolong the gas well production cycle significantly.
2) in process of production, can utilize the airtight annular space production that is formed by first oil pipe and second oil pipe, also available little oil pipe (second oil pipe) is directly produced, along with the prolongation of production time, when strata pressure drops to that to a certain degree the shaft bottom forms new hydrops, utilize nitrogen gaslift induced flow, when reaching certain pressure, gas lift valve in second oil pipe is opened, and the liquid in shaft bottom is discharged from, thereby realizes circulation gaslift liquid discharging gas producing.
3) gas lift valve can be repeatedly used among the present invention, as long as gas well owing to ponding causes stopping production, can reproduce by nitrogen gaslift induced flow.
4) the present invention is to the formation damage minimum, and can be with the ponding emptying of shaft bottom and near wellbore zone.
5) simple to operate: clean-out crew uses small-scale workshops machine (load is less than 15 tons) can play oil pipe.And the activity duration is short, and workover cost is low.
6) safe and reliable: as before the operation, gas well to be carried out pressure measurement, surveys liquid level, grasp subsurface information, for selecting pressure control device and shut-in well device ready.Pressure control device also can be selected according to this area's original formation pressure, or the well control device of selection and a pressure rating of gas production wellhead.
7) total cost is low: be the 60%-70% of coiled tubing water pumping gas production method cost.(1) workover cost is low; (2) the plain tubing cost is lower than coiled tubing; (3) with common gas production completion method ratio, nitrogen use level is few during gaslift.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. water pumping gas production device, comprise first four-way (3), first oil pipe (7) and sleeve pipe (5), the first oil pipe intercalation is in sleeve pipe, the bottom of first four-way is connected with sleeve pipe, first oil pipe, first tubing hanger interior with being stuck in first four-way is connected, it is characterized in that: the top of first four-way is connected with second four-way (2), card has second tubing hanger in second four-way, the second tubing hanger bottom connects second oil pipe (6), second oil pipe vertically passes second four-way successively, first four-way, and intercalation forms airtight toroidal cavity between first oil pipe and second oil pipe in first oil pipe; Second oil pipe that is positioned at the down-hole is fixedly connected with some grades of gas lift valves (4), and the second oil pipe bottom is connected with blanking plug (8), and the blanking plug below is connected with the blanking plug recycling bin (9) that is used with blanking plug.
2. water pumping gas production device according to claim 1, it is characterized in that: this device also comprises triple ram preventer (1) and annular blowout preventer (10), triple ram preventer is connected with the top of second four-way, and the bottom of annular blowout preventer is connected by flange with the top of triple ram preventer.
3. water pumping gas production method, it is characterized in that: this method may further comprise the steps:
1) pressure gauge is transferred to the shaft bottom by first oil pipe, measure static bottom-hole pressure and liquid level, according to the shut-in well device of pressure selection pressure ratings match and set blanking plug and the opening pressure value of gas lift valve;
2) remove former wellhead assembly, and improve gas producing device on the basis that former wellhead assembly exists;
3) after gas producing device is installed, suppress in second oil pipe with nitrogen, when force value reaches the opening pressure of blanking plug, open blanking plug;
4) continue to suppress in second oil pipe with nitrogen, when pressure reaches the opening pressure of gas lift valve, open gas lift valve step by step, with in the pit shaft, the liquid in shaft bottom discharges, till natural gas is by shaft bottom blowing production.
4. water pumping gas production method according to claim 3, it is characterized in that: in the step 1), if detect in first oil pipe pressure arranged, but insufficient pressure is so that the natural gas blowing, use steel wire to send into first oil pipe bottom and to stop up first oil pipe with the blanking plug that first oil pipe matches, bleed off the residual pressure in first oil pipe, enter step 2 then); If no pressure in first oil pipe then directly enters step 2).
5. water pumping gas production method according to claim 3 is characterized in that: step 2) in, remove former wellhead assembly, and improve gas producing device on the basis that former wellhead assembly exists and may further comprise the steps:
1) at the top of original first four-way second four-way, triple ram preventer and annular blowout preventer are installed successively from down to up;
2) second oil pipe that will have a multistage gas lift valve successively by annular blowout preventer, triple ram preventer, second four-way and the first four-way intercalation in described first oil pipe;
3) blanking plug recycling bin, blanking plug are transferred successively to the second oil pipe bottom;
4) remove triple ram preventer, ring packing device successively, by the second four-way top second tubing hanger is installed then, and make the second tubing hanger bottom and the second oil pipe snapping.
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| CN201310288234.6A CN103306643B (en) | 2013-07-10 | 2013-07-10 | A kind of water drainage gas production device and method |
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| CN201310288234.6A CN103306643B (en) | 2013-07-10 | 2013-07-10 | A kind of water drainage gas production device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790916A (en) * | 2015-04-24 | 2015-07-22 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Method for removing gas well accumulated liquid by means of oil jacket pressure balancing method |
| CN104806211A (en) * | 2015-03-23 | 2015-07-29 | 崔斌 | Replacing press gas oil extraction device and method |
| CN106050199A (en) * | 2016-07-29 | 2016-10-26 | 南充西南石油大学设计研究院有限责任公司 | Synthetic drainage and gas production device and method |
| CN106050198A (en) * | 2016-07-29 | 2016-10-26 | 南充西南石油大学设计研究院有限责任公司 | Comprehensive drainage and gas extraction system for low-pressure low-yield well |
| CN106522894A (en) * | 2017-01-06 | 2017-03-22 | 盐城华亚石油机械制造有限公司 | Multifunctional integrated operation device specially used for coalbed methane |
| CN107939351A (en) * | 2016-10-12 | 2018-04-20 | 中国石油天然气股份有限公司 | Coal bed gas drainage and gas production device and using method thereof |
| CN108252681A (en) * | 2017-12-27 | 2018-07-06 | 中国石油天然气股份有限公司 | Steam channeling prevention and control device and method for thermal production well operation |
| CN108625822A (en) * | 2018-05-08 | 2018-10-09 | 海峰深水（天津）技术服务有限公司 | Multistage sequentially triggered emergency system capable of automatically shearing tubular column and sealing well |
| CN110924906A (en) * | 2016-10-20 | 2020-03-27 | 中国石油化工股份有限公司 | Gas lift well liquid discharge simulation test device |
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| CN112343556A (en) * | 2020-12-02 | 2021-02-09 | 中国海洋石油集团有限公司 | Offshore gas well coiled tubing flowing back tubular column |
| CN112943169A (en) * | 2019-11-26 | 2021-06-11 | 中国石油天然气股份有限公司 | Positive circulation gas injection, drainage and gas production system for small-diameter oil pipe |
| CN113090231A (en) * | 2021-04-22 | 2021-07-09 | 新疆瀚科油气技术服务有限公司 | Gas lift drainage and gas production integrated speed pipe column and operation process thereof |
| CN116104456A (en) * | 2023-04-14 | 2023-05-12 | 陕西航天德林科技集团有限公司 | Drainage gas production system and drainage gas production method |
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| CN104806211A (en) * | 2015-03-23 | 2015-07-29 | 崔斌 | Replacing press gas oil extraction device and method |
| CN104806211B (en) * | 2015-03-23 | 2018-05-18 | 崔斌 | One kind takes over calm the anger extracting device of oil and method |
| CN104790916B (en) * | 2015-04-24 | 2017-04-19 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Method for removing gas well accumulated liquid by means of oil jacket pressure balancing method |
| CN104790916A (en) * | 2015-04-24 | 2015-07-22 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Method for removing gas well accumulated liquid by means of oil jacket pressure balancing method |
| CN106050199A (en) * | 2016-07-29 | 2016-10-26 | 南充西南石油大学设计研究院有限责任公司 | Synthetic drainage and gas production device and method |
| CN106050198A (en) * | 2016-07-29 | 2016-10-26 | 南充西南石油大学设计研究院有限责任公司 | Comprehensive drainage and gas extraction system for low-pressure low-yield well |
| CN107939351A (en) * | 2016-10-12 | 2018-04-20 | 中国石油天然气股份有限公司 | Coal bed gas drainage and gas production device and using method thereof |
| CN110924906A (en) * | 2016-10-20 | 2020-03-27 | 中国石油化工股份有限公司 | Gas lift well liquid discharge simulation test device |
| CN110924906B (en) * | 2016-10-20 | 2021-11-09 | 中国石油化工股份有限公司 | Gas lift well liquid discharge simulation test device |
| CN106522894A (en) * | 2017-01-06 | 2017-03-22 | 盐城华亚石油机械制造有限公司 | Multifunctional integrated operation device specially used for coalbed methane |
| CN108252681A (en) * | 2017-12-27 | 2018-07-06 | 中国石油天然气股份有限公司 | Steam channeling prevention and control device and method for thermal production well operation |
| CN108625822A (en) * | 2018-05-08 | 2018-10-09 | 海峰深水（天津）技术服务有限公司 | Multistage sequentially triggered emergency system capable of automatically shearing tubular column and sealing well |
| CN108625822B (en) * | 2018-05-08 | 2024-04-02 | 海一峰深水（天津）技术服务有限公司 | Multistage sequential triggering emergency system capable of automatically shearing tubular column and sealing well hole |
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