CN107143296A - A kind of horizontal gas well negative pressure drags for sand method, horizontal gas well negative pressure and drags for sand system - Google Patents
A kind of horizontal gas well negative pressure drags for sand method, horizontal gas well negative pressure and drags for sand system Download PDFInfo
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- CN107143296A CN107143296A CN201710323144.4A CN201710323144A CN107143296A CN 107143296 A CN107143296 A CN 107143296A CN 201710323144 A CN201710323144 A CN 201710323144A CN 107143296 A CN107143296 A CN 107143296A
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- sand
- coiled tubing
- gas
- negative pressure
- horizontal
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B27/00—Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, baskets or buckets for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits
Abstract
Sand method, horizontal gas well negative pressure are dragged for the present invention relates to a kind of horizontal gas well negative pressure and drags for sand system, belong to petroleum gas workover treatment field.The horizontal gas well negative pressure of the present invention drags for sand method, comprises the following steps：1) ball-and-seat is set in one end of coiled tubing, coiled tubing is provided with to one end of ball-and-seat as in the horizontal segment of front end tripping in Wellbore of Gas Wells, by producing or sand is caught in emptying progress；2) catch after sand terminates, coiled tubing is gone out from Wellbore of Gas Wells, sand setting is discharged.The horizontal gas well negative pressure of the present invention drags for sand method, coiled tubing is transferred into the horizontal fragment position of pit shaft by sand washing ball-and-seat, only relying on gas flow can bring sand grains in coiled tubing into, can be by abrasive band outlet well shaft by playing lower tubular column.Compared with conventional sand washing process, entirely drag for during sand, can be achieved to remain that wellbore pressure is less than strata pressure, and required operational discharge capacity is small, efficiency of construction is high, and stratum will not be damaged.
Description
Technical field
Sand method, horizontal gas well negative pressure are dragged for the present invention relates to a kind of horizontal gas well negative pressure and drags for sand system, belong to oil natural
Gas workover treatment field.
Background technology
In low pressure horizontal gas well production process, after gas well shakes out, because reservoir pressure is relatively low, sand in well can not be by
Air-flow is taken out of in time, and the phenomenon that sand is deposited in pit shaft horizontal segment just occurs so that flow resistance increase, causes gas well to produce
Amount declines, or even stops production；Meanwhile, during gas well test jobs, pit shaft product sand easily causes testing tool and is hampered, meets card, damage
Bad tester, directly results in test jobs failure.
Conventional gas well sand washing process is, by tripping in oil pipe, to set up circulation canal, and direct circulation or reacting cycle are passed through with liquid
Mode the abrasive band in pit shaft is gone out to ground, there is problems with to the gas well of pressure in the sand washing process：One is that sand washing is liquid-tight
Degree is big, causes wellbore pressure to be more than strata pressure, and hydraulic slip amount is big, and returning fluid's upward velocity causes sand washing effect poor slowly, applies
The work cycle is long；Two be due to sand cleaning fluid leakage, causes reservoir damage, and gas well deliverability declines；Three be due to that wastage is big, later stage row
The liquid cycle is long, and the long period can just return to normal production.
The content of the invention
Sand method is dragged for it is an object of the invention to provide a kind of high horizontal gas well negative pressure of simple, efficiency of construction.
Sand system is dragged for present invention also offers a kind of horizontal gas well negative pressure.
In order to realize the above object the horizontal gas well negative pressure of the present invention drags for the technical scheme that sand method used is：
A kind of horizontal gas well negative pressure drags for sand method, comprises the following steps：
1) in the horizontal segment of the front end tripping in Wellbore of Gas Wells of coiled tubing, it will be produced or be vented by coiled tubing and caught
Sand；The front end of the coiled tubing is provided with ball-and-seat；
2) catch after sand terminates, coiled tubing is gone out from Wellbore of Gas Wells, sand setting is discharged.
Ball-and-seat can control the sand flow body of taking in Wellbore of Gas Wells horizontal segment to enter coiled tubing from front end and can prevent sand
Grain flows back to pit shaft out of coiled tubing.The sand flow body of taking is the gas and liquid for carrying the gas of sand body or carrying sand grains
Mixture.
The horizontal gas well negative pressure of the present invention drags for sand method, and coiled tubing is transferred into the horizontal section of pit shaft by sand washing ball-and-seat
Put, only relying on gas flow can both bring sand grains in coiled tubing into, can be by abrasive band outlet well shaft by playing lower tubular column.
It compared with conventional sand washing process, during entirely dragging for sand, can be achieved to remain that wellbore pressure is less than strata pressure, and required apply
Work discharge capacity is small, and efficiency of construction is high, and stratum will not be damaged.
It is preferred that, step 1) in, coiled tubing is moved on Wellbore of Gas Wells horizontal segment bearing of trend during catching sand
Front end.The front end that the side extended in Wellbore of Gas Wells horizontal segment moves up coiled tubing is produced or is vented, you can the company of completion
Continuous sand washing process.It is further preferred that from close to the one of well head on Wellbore of Gas Wells horizontal segment bearing of trend during sand washing
Hold and the front end of coiled tubing is moved to one end away from well head.It can ensure that the sand in pit shaft is gone out completely.
It is preferred that, step 1) it is additionally included in catch before sand or catch and high-pressure natural gas is injected into Wellbore of Gas Wells during sand.Note
When entering high-pressure natural gas, the pressure in control Wellbore of Gas Wells is less than strata pressure.Pressure in pit shaft is less than strata pressure, can
Prevent outside fluid from entering reservoir, prevent from polluting reservoir.For the small horizontal gas well of gas production, only pass through the day in Wellbore of Gas Wells
Right gas carries out catching sand, and effect is not good, by injecting high-pressure natural gas into Wellbore of Gas Wells, when being produced or being vented, can be with
Increase rate of flow of fluid, the sand grains in pit shaft is carried along into coiled tubing.Catch before sand or catch and inject high-pressure natural gas during sand
When, the process of injection natural gas can be continued until that dragging for sand terminates, and can also only continue for some time.It is further preferred that
Production or emptying catch the process of sand and inject high-pressure natural gas into Wellbore of Gas Wells carrying out simultaneously.Catch sand process with to gas well
Injection high-pressure natural gas is carried out simultaneously in pit shaft, can improve the efficiency for dragging for sand.
It is further preferred that high pressure day is injected into Wellbore of Gas Wells by the annular space between corresponding production casing and oil pipe
Right gas.Coiled tubing has a set of sealing device in well head, for sealing the annular space between Russia's coiled tubing and well head.Pass through annular space
High-pressure natural gas is injected into Wellbore of Gas Wells, the efficiency of sand washing can be improved, and it is more preferable to drag for sand effect.
It is preferred that, in the horizontal segment by the front end of coiled tubing by oil pipe tripping in Wellbore of Gas Wells.
The horizontal gas well negative pressure of the present invention drag for technical scheme that sand system used for：
A kind of horizontal gas well negative pressure drags for sand system, including for the preventer being connected with oil pipe, the company being connected with preventer
Continuous tubing injector head, it can carry out catching sand through preventer and coiled tubing injection head tripping in Wellbore of Gas Wells horizontal segment and can be from
Rise to carry out the coiled tubing of sediment outflow in Wellbore of Gas Wells；The coiled tubing is included for tripping in Wellbore of Gas Wells horizontal segment front end
With the end for being arranged on ground, the front end is provided with the single current that sand flow body enters coiled tubing of taking being used in controlled level section
Valve, the end is provided with control valve.
It is described to take sand flow body for the gas for carrying sand grains or the mixture of the gas and liquid that carry sand body.The control valve
For controlling the end of coiled tubing to open or closed, the end of coiled tubing can be produced or be vented when opening.
Coiled tubing injection head can play sealed effect, moreover it is possible to apply downward power to coiled tubing, it is ensured that continuous
It is capable of the horizontal segment of tripping in pit shaft in the front end of oil pipe.
The horizontal gas well negative pressure of the present invention drags for sand system, simple in construction, using flexible, and coiled tubing sequentially passes through continuous oil
Tube injection head, preventer and oil pipe tripping in sand flushing tool with pressure can be removed continuously, be not required to shackle, and working procedure is simple, applies
The work cycle is short.
It is preferred that, above-mentioned horizontal gas well negative pressure drags for the oil pipe that sand system also includes passing through for coiled tubing, is set in oil pipe
Outer production casing, forms annular space between the production casing and oil pipe, production casing is provided with least one and the annular space
The natural gas filling entrance of connection.Natural gas filling entrance is set on production casing, is easy to the injection high pressure into Wellbore of Gas Wells natural
Gas.Oil pipe in Wellbore of Gas Wells namely for gas production flow string, it is general under to horizontal well horizontal segment starting point with
Upper 50m, during sand washing coiled tubing typically will during sand washing under starting point to the end of horizontal segment, it is ensured that the sand of horizontal segment
Into continuously having in oil pipe.
Also include being used for natural gas filling entrance and natural gas it is further preferred that above-mentioned horizontal gas well negative pressure drags for sand system
Compressor is provided between the connected discharge in source, the entrance of the discharge and natural gas.Compressor be able to can only be carried in station
During for low pressure natural gas, it is easy to be pressurized low pressure natural gas.
Brief description of the drawings
Fig. 1 is that horizontal gas well negative pressure drags for sand system embodiment one and horizontal gas well negative pressure drags for the signal of sand embodiment of the method one
Figure；
Fig. 2 is that horizontal gas well negative pressure drags for sand system embodiment two and horizontal gas well negative pressure drags for the signal of sand embodiment of the method two
Figure；
Fig. 3 is that horizontal gas well negative pressure drags for sand system embodiment three and horizontal gas well negative pressure drags for the signal of sand embodiment of the method three
Figure；
Gas production wellhead tubular column structure when Fig. 4 normally produces for the gas recovery well that horizontal gas well negative pressure drags for sand system embodiment one
Schematic diagram.
Embodiment
Technical scheme is described further below in conjunction with embodiment.
The horizontal gas well negative pressure of the present invention drags for the embodiment one of sand system as shown in figure 1, including being located in Wellbore of Gas Wells
Production casing 12, the oil pipe 13 being located in production casing 12 and the coiled tubing 17 through oil pipe 13；Oil pipe 13 is located at ground
One end is connected with preventer 19 and coiled tubing injection head 20 in turn, and coiled tubing 17 includes being used for tripping in Wellbore of Gas Wells horizontal segment
Front end and set end on the ground, front end is provided with the ball-and-seat that sand flow body enters coiled tubing 17 of taking in controlled level section
18, end is provided with control valve 22, and control valve 22 is used for the unlatching or closed for controlling the end of coiled tubing 17, the end of coiled tubing 17
End can be produced or be vented when opening；The front end of coiled tubing 17 sequentially passes through coiled tubing injection head 20, the and of preventer 19
In the horizontal segment of the tripping in Wellbore of Gas Wells of oil pipe 13；Production casing 12 includes being arranged on the sleeve pipe latter end of gas well vertical section and is arranged on
The sleeve pipe leading portion of gas well horizontal segment, forms annular space between sleeve pipe latter end and oil pipe 13, and sleeve pipe latter end is provided with what is connected with annular space
String is provided with string on sleeve valve 2 and sleeve valve 5, branch pipe b and is provided with sleeve valve 3 and casing valve on branch pipe a and branch pipe b, branch pipe a
Door 6, branch pipe b is connected as natural gas filling entrance with low pressure natural gas discharge in station, and set compressor on branch pipe b
23.Coiled tubing 17 is on coiled tubing reel 21.
The horizontal gas well negative pressure of the present invention drags for the embodiment two of sand system, as shown in Fig. 2 dragging for sand system with horizontal gas well negative pressure
Branch pipe b is directly connected by differing only in for the embodiment one of system with station inner high voltage natural gas collecting pipe, is not provided with compressor.
The horizontal gas well negative pressure of the present invention drags for the embodiment three of sand system, as shown in figure 3, dragging for sand system with horizontal gas well negative pressure
Differing only in for the embodiment one of system is not provided with natural gas filling entrance on production casing 12.
In the prior art, when gas recovery well is normally produced, gas recovery well wellhead column structural representation is shown in Fig. 4, gas recovery well well head
Tubing string includes oil pipe 13, along oil pipe 13 to bearing of trend inside gas well on the test valve 7, the gas production wellhead main gate-board that set gradually
Valve 4, gas production wellhead main switch plate valve 1；Oil pipe 13 has two branch being arranged between test valve 7 and gas production wellhead main switch plate valve 4
String is provided with string on tubing valve 8 and tubing valve 10, another branch pipe and is provided with tubing valve 9 and tubing valve on pipe, a branch pipe
Door 11；Oil pipe 13, which is located at outside the oil pipe of part of the gas production wellhead main switch plate valve below 1, is arranged with production casing 12, production casing 12
Close to the position of gas production wellhead provided with annular space is connected between oil pipe 12 and production casing 13 branch pipe a and branch pipe b, branch pipe a
Upper string is provided with string on sleeve valve 2 and sleeve valve 5, branch pipe b and is provided with sleeve valve 3 and sleeve valve 6.There is target on Wellbore of Gas Wells
Point A15 and target spot B16, is reservoir 14 between target spot A and target spot B.
The horizontal gas well negative pressure of the present invention drags for the embodiment one of sand method, as shown in figure 1, with the small horizontal gas well of gas production
For objective for implementation, comprise the following steps：
1) ground flow is first connected, the control valve of the end of coiled tubing 17 is closed, tubing valve 8, tubing valve is closed
9th, tubing valve 10, tubing valve 11, branch pipe valve 2, branch pipe valve 5, branch pipe valve 3 and branch pipe valve 6；Lift coiled tubing
Injection head 20, preventer 19 are connected with test valve；Coiled tubing 17 is pulled out from coiled tubing reel 21, makes coiled tubing 17
Front end sequentially passes through coiled tubing injection head 20, preventer 19 and oil pipe 13；Coiled tubing injection head 20 seals coiled tubing 17,
Test valve, gas production wellhead main switch plate valve and gas production wellhead main switch plate valve are opened, it is by coiled tubing 17 that ball-and-seat 18 is with pressure
Under to the horizontal fragment position of Wellbore of Gas Wells；Compressor 23 is set on branch pipe b, then by branch pipe b and low pressure natural gas gas collection in station
Pipe is connected；
After in the horizontal segment of the front end tripping in Wellbore of Gas Wells of coiled tubing；Branch pipe valve 3 and branch pipe valve 6 are opened, is beaten
The low pressure natural gas supercharging in 23 pairs of stations of compressor is opened, then by the natural gas after supercharging through between production casing 12 and oil pipe 13
Annular space be injected into Wellbore of Gas Wells, control Wellbore of Gas Wells in pressure be less than strata pressure；Coiled tubing end is opened simultaneously
Control valve 22 be vented, and by the front end of coiled tubing from target spot A15 be moved to target spot B16 carry out catch sand；
2) catch after sand terminates, stop injection natural gas, the control valve 22 for closing coiled tubing end stops emptying, from gas well
With pressure goes out coiled tubing 17 in pit shaft, and the sand grains in pit shaft is taken out of, sand setting is then discharged out.
It is whole to drag for gas production wellhead main gate valve and main gate valve, test valve during sand and be in normally open, only play passage
Effect.
The horizontal gas well negative pressure of the present invention drags for the embodiment two of sand method, as shown in Fig. 2 with the small horizontal gas well of gas production
For objective for implementation, the difference for dragging for the embodiment one of sand method with horizontal gas well negative pressure is that the high pressure used in station is natural
Gas, without compression, inner high voltage natural gas will be stood through the ring between production casing 12 and oil pipe 13 by directly opening valve 3 and valve 6
Sky is injected into Wellbore of Gas Wells, and the pressure in control Wellbore of Gas Wells is less than strata pressure.
The horizontal gas well negative pressure of the present invention drags for the embodiment three of sand method, as shown in figure 3, with the larger horizontal gas of gas production
Well is objective for implementation, and the difference of the embodiment one of sand method is dragged for without injecting day into Wellbore of Gas Wells with horizontal gas well negative pressure
Right gas and it is whole drag for branch pipe valve 3 and branch pipe valve 6 during sand and be closed, by the front end tripping in gas of coiled tubing 17
The horizontal segment of well shaft, directly opens coiled tubing and is vented, while the front end of coiled tubing is moved into target spot from target spot A
B carries out catching sand.
The horizontal gas well negative pressure of the present invention drags for the example IV of sand method, as shown in Fig. 2 dragging for sand side with horizontal gas well negative pressure
The difference of the embodiment two of method is to close valve 3 and valve 6, high-pressure natural gas is not injected by casing annulus, by oil pipe 13
The branch pipe for being provided with tubing valve 9 and tubing valve 11 is connected with the high-pressure natural gas in station, opens tubing valve 9 and tubing valve
Door 11, high-pressure natural gas is injected into Wellbore of Gas Wells.
The horizontal gas well negative pressure of the present invention is dragged in the other embodiment of sand method, and the front end of coiled tubing is lowered into gas well
After pit shaft horizontal segment, the front end that can not also move coiled tubing carries out catching sand, but do not move the progress of coiled tubing front end
Efficiency comparison is low.
Claims (7)
1. a kind of horizontal gas well negative pressure drags for sand method, it is characterised in that：Comprise the following steps：
1) progress in the horizontal segment of the front end tripping in Wellbore of Gas Wells of coiled tubing, will be produced or be vented by coiled tubing catch sand；
The front end of the coiled tubing is provided with ball-and-seat；
2) catch after sand terminates, coiled tubing is gone out from Wellbore of Gas Wells, sand setting is discharged.
2. horizontal gas well negative pressure according to claim 1 drags for sand method, it is characterised in that：Step 1) in, catch the process of sand
In on Wellbore of Gas Wells horizontal segment bearing of trend mobile coiled tubing front end.
3. horizontal gas well negative pressure according to claim 1 drags for sand method, it is characterised in that：Step 1) it is additionally included in and catches before sand
Or catch high-pressure natural gas is injected into Wellbore of Gas Wells during sand.
4. horizontal gas well negative pressure according to claim 3 drags for sand method, it is characterised in that：By corresponding production casing and
Annular space between oil pipe injects high-pressure natural gas into Wellbore of Gas Wells.
5. a kind of horizontal gas well negative pressure drags for sand system, it is characterised in that：Including the preventer and preventer for being connected with oil pipe
Connected coiled tubing injection head, it can carry out catching sand through preventer and coiled tubing injection head tripping in Wellbore of Gas Wells horizontal segment
And the coiled tubing of carry out sediment outflow can be gone out from Wellbore of Gas Wells；The coiled tubing includes being used for tripping in Wellbore of Gas Wells horizontal segment
Front end and end for being arranged on ground, the front end is provided with the sand flow body of taking being used in controlled level section and enters continuous oil
The ball-and-seat of pipe, the end is provided with control valve.
6. horizontal gas well negative pressure according to claim 5 drags for sand system, it is characterised in that：Also include passing through for coiled tubing
Oil pipe, the production casing that is set in outside oil pipe, annular space is formed between the production casing and oil pipe, production casing is provided with extremely
Lack a natural gas filling entrance connected with the annular space.
7. horizontal gas well negative pressure according to claim 6 drags for sand system, it is characterised in that：Also include being used for natural gas filling
Compressor is provided between the discharge that entrance is connected with gas source, discharge and the natural gas filling entrance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710323144.4A CN107143296B (en) | 2017-05-09 | 2017-05-09 | A kind of horizontal gas well negative pressure fishing sand method, horizontal gas well negative pressure fish out sand system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710323144.4A CN107143296B (en) | 2017-05-09 | 2017-05-09 | A kind of horizontal gas well negative pressure fishing sand method, horizontal gas well negative pressure fish out sand system |
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| CN107143296A true CN107143296A (en) | 2017-09-08 |
| CN107143296B CN107143296B (en) | 2019-11-22 |
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Cited By (3)
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| CN109083621A (en) * | 2018-07-28 | 2018-12-25 | 中国石油天然气股份有限公司 | A kind of horizontal well coiled tubing composite blockage relieving method |
| CN112377148A (en) * | 2020-11-12 | 2021-02-19 | 中联煤层气有限责任公司 | Speed pipe communication device and method |
| CN113175311A (en) * | 2020-04-08 | 2021-07-27 | 中国石油天然气股份有限公司 | Throttle device and method for replacing throttle core |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109083621A (en) * | 2018-07-28 | 2018-12-25 | 中国石油天然气股份有限公司 | A kind of horizontal well coiled tubing composite blockage relieving method |
| CN113175311A (en) * | 2020-04-08 | 2021-07-27 | 中国石油天然气股份有限公司 | Throttle device and method for replacing throttle core |
| CN113175311B (en) * | 2020-04-08 | 2022-08-05 | 中国石油天然气股份有限公司 | Throttle device and method for replacing throttle core |
| CN112377148A (en) * | 2020-11-12 | 2021-02-19 | 中联煤层气有限责任公司 | Speed pipe communication device and method |
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| Publication number | Publication date |
|---|---|
| CN107143296B (en) | 2019-11-22 |
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