CN106812506A - Separate layer water injection string and application method - Google Patents
Separate layer water injection string and application method Download PDFInfo
- Publication number
- CN106812506A CN106812506A CN201510855190.XA CN201510855190A CN106812506A CN 106812506 A CN106812506 A CN 106812506A CN 201510855190 A CN201510855190 A CN 201510855190A CN 106812506 A CN106812506 A CN 106812506A
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- packer
- water injection
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- oil pipe
- separate layer
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 237
- 238000002347 injection Methods 0.000 title claims abstract description 205
- 239000007924 injection Substances 0.000 title claims abstract description 205
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012360 testing method Methods 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 18
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 239000000725 suspension Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 99
- 230000008859 change Effects 0.000 description 6
- 238000012856 packing Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention provides a kind of separate layer water injection string and application method.Separate layer water injection string of the present invention, including：Oil pipe, the first water filling, at least one second water injection units；Wherein, oil pipe includes that along the lower end and upper end on the axial direction of oil pipe lower end is the one end towards water injection well sleeve bottom；First water injection unit includes：Mechanical-set packer and the first injection well downhole flow regulator；First injection well downhole flow regulator is connected to the lower end of oil pipe, and mechanical-set packer is arranged on the top of the first injection well downhole flow regulator and is connected with the oil pipe；Second water injection unit, including：Hydraulic setting packer and the second injection well downhole flow regulator；Wherein, the second water injection unit is arranged on the top of mechanical-set packer；Second injection well downhole flow regulator is arranged between the water injection unit below the second water injection unit and hydraulic setting packer, and is connected with oil pipe；Hydraulic setting packer is arranged on the top of the second injection well downhole flow regulator, and is connected with oil pipe.The present invention can improve operating efficiency, save man-hour.
Description
Technical field
The present invention relates to oil field development technical field, more particularly to a kind of separate layer water injection string and application method.
Background technology
In oil field development, water filling turns into one of important measures of oilfield stable production and volume increase, the underground in oil field
Oil reservoir is often multiple zone and heterogeneous, and the permeance property of each oil reservoir has difference, in the work of same pressure
Under, high permeability zone water absorbing capacity is high, and injection water can be along high permeability zone channelling, and middle less permeable layer is inhaled
Water is few, is absorbed water uneven problem with plane in interlayer, layer so as to cause, in order to alleviate above mentioned problem,
Generally using the development scheme of seperated layer water injection, control strengthens centering hyposmosis to the water injection rate of high permeability zone
The water injection rate of layer, to realize that each oil reservoir can play a role, improves the recovery ratio in oil field.
At present, the implementation of seperated layer water injection is generally and installs separate layer water injection string in water filling casing,
Each water filling layer is separated by the packer of separate layer water injection string, then by injection well downhole flow regulator to the note of each water filling layer
Water is controlled, and then realizes seperated layer water injection.When separate layer water injection string being installed in water filling casing,
Need that packer is carried out to test envelope, if there is gap between packer and water filling casing after setting,
Need to be by removing seal for packer, set packer again.
However, each packer on separate layer water injection string typically each uses hydraulic setting packer, example
Such as country's Y341 type packers, hydraulic setting packer sets as disposable, to set liquid again
Pressure set packer, then need from water filling casing to take out separate layer water injection string completely, reinstalls liquid
, be lowered into separate layer water injection string in water filling casing again afterwards by pressure set packer, and hydraulic pressure is set again
Set packer, then carries out testing envelope again, until sealed between hydraulic setting packer and water filling casing,
The installation of separate layer water injection string is completed, wherein, any one packer and water filling on separate layer water injection string
If there is gap between casing, the above-mentioned course of work is required for again so that the course of work is cumbersome, work
Make efficiency low.
The content of the invention
The present invention provides a kind of separate layer water injection string and application method, to overcome operating efficiency in the prior art
Low problem.
In a first aspect, the present invention provides a kind of separate layer water injection string, including：
Oil pipe, the first water injection unit, at least one second water injection units；
Wherein, the oil pipe is included along the lower end and upper end on the axial direction of the oil pipe, the lower end
It is the one end towards the water injection well sleeve bottom；
First water injection unit, including：Mechanical-set packer and the first injection well downhole flow regulator；Described first matches somebody with somebody
Hydrophone is connected to the lower end of the oil pipe, and the mechanical-set packer is arranged on first injection well downhole flow regulator
Top and it is connected with the oil pipe；
Second water injection unit, including：Hydraulic setting packer and the second injection well downhole flow regulator；Wherein, it is described
Second water injection unit is arranged on the top of the mechanical-set packer；Second injection well downhole flow regulator is arranged on institute
State between the water injection unit below the second water injection unit and the hydraulic setting packer, and with the oil pipe
Connection；The hydraulic setting packer is arranged on the top of second injection well downhole flow regulator, and connects with the oil pipe
Connect.
Second aspect, the present invention provides a kind of application method of separate layer water injection string, is applied to such as first party
In separate layer water injection string described in face, including：
Take out the blanking plug in first injection well downhole flow regulator；
To enter in water filling casing under oil pipe in the separate layer water injection string, make the separate layer water injection string
In mechanical-set packer be located at the first water filling layer of water injection well and the second water filling layer of the water injection well
Between；
The mechanical-set packer is set, makes the mechanical-set packer close with the water filling casing
Envelope；
Set the hydraulic setting packer.
Separate layer water injection string of the present invention and application method, because mechanical-set packer may be implemented in sleeve pipe
Change place repeatedly sets, and without separate layer water injection string is taken out from well, being capable of achieving to go into the well just can once make
Sealed between mechanical-set packer and sleeve pipe, it is any one on middle separate layer water injection string compared to existing technology
If there is gap between individual hydraulic setting packer and sleeve pipe, it is required for taking separate layer water injection string from well
Go out, then descend well operations again, the separate layer water injection string of the embodiment of the present invention reduces lift pipe string and goes into the well again
The probability of operation, it is possible to increase operating efficiency, saves man-hour.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to reality
The accompanying drawing to be used needed for example or description of the prior art is applied to be briefly described, it should be apparent that, under
Accompanying drawing in the description of face is some embodiments of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the embodiment of separate layer water injection string of the present invention；
Fig. 2 is the structural representation of another embodiment of separate layer water injection string of the present invention；
Fig. 3 is the schematic flow sheet of the embodiment of application method one of separate layer water injection string of the present invention；
Fig. 4 is the schematic flow sheet of another embodiment of application method of separate layer water injection string of the present invention.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with this hair
Accompanying drawing in bright embodiment, is clearly and completely described to the technical scheme in the embodiment of the present invention,
Obviously, described embodiment is a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of creative work is not made
The every other embodiment for obtaining, belongs to the scope of protection of the invention.
Fig. 1 is the structural representation of the embodiment of separate layer water injection string of the present invention.As shown in figure 1, this reality
The separate layer water injection string of example is applied, be can apply in water filling casing, including：
Oil pipe 10, the first water injection unit, at least one second water injection units；
Wherein, the oil pipe 10 is included along the lower end 11 and upper end on the axial direction of the oil pipe 10
12, the lower end 11 is the one end towards the bottom of water filling casing 50；
First water injection unit includes：The injection well downhole flow regulator 41 of mechanical-set packer 20 and first；Described
One injection well downhole flow regulator 41 is connected to the lower end 11 of the oil pipe 10, and the mechanical-set packer 20 is arranged on
The top of first injection well downhole flow regulator 41 and it is connected with the oil pipe 10；
Second water injection unit, including：The injection well downhole flow regulator 42 of hydraulic setting packer 30 and second；Wherein,
Second water injection unit is arranged on the top of the mechanical-set packer 20；Second injection well downhole flow regulator
42 are arranged between the water injection unit below second water injection unit and the hydraulic setting packer 30,
And be connected with the oil pipe 10；The hydraulic setting packer 30 is arranged on second injection well downhole flow regulator 42
Top, and be connected with the oil pipe 10.
Specifically, as shown in figure 1, the embodiment of the present invention provides a kind of separate layer water injection string, under being used for
Enter in water filling casing, including：Oil pipe 10, the injection well downhole flow regulator 41 of mechanical-set packer 20 and first, extremely
Few second water injection unit, including the injection well downhole flow regulator 42 of hydraulic setting packer 30 and second；Oil pipe 10 is wrapped
The lower end 11 and upper end 12 on the axial direction along oil pipe are included, lower end 11 is insertion end.
The first injection well downhole flow regulator 41 and the second injection well downhole flow regulator 42 are referred to as injection well downhole flow regulator 40 in embodiments of the present invention.
Wherein, the second water injection unit, the i.e. quantity of hydraulic setting packer 30 can be one or more,
When the quantity of hydraulic setting packer 30 is for multiple, hydraulic setting packer 30 is supreme along lower end 11
On the direction at end 12, it is connected in turn on oil pipe 10, also connects between each hydraulic setting packer 30
It is connected to injection well downhole flow regulator 40.
It is illustrated when being below one with hydraulic setting packer 30：
Now, injection well downhole flow regulator 40 includes the first injection well downhole flow regulator 41 and the second injection well downhole flow regulator 42；It is supreme from lower end 11
On the direction at end 12, the first injection well downhole flow regulator 41, mechanical-set packer 20, the second injection well downhole flow regulator 42 and hydraulic pressure
Set packer 30 is connected in turn on oil pipe 10.
Wherein, the lower end 11 of oil pipe 10 is insertion end, i.e., when entering under oil pipe 10 to vertical water injection well set
When in pipe 50, the lower end 11 of oil pipe 10 is bottom, now, by bottom to top, is followed successively by first and matches somebody with somebody
Hydrophone 41, mechanical-set packer 20, the second injection well downhole flow regulator 42 and hydraulic setting packer 30.
It is arranged on the process in water filling casing 50 to illustrate below by description separate layer water injection string
The embodiment of the present invention.
Before going into the well, therefore, to assure that there is no blanking plug in the first injection well downhole flow regulator 41, will enter to note under oil pipe 10
In well sleeve pipe 50, mechanical-set packer 20 is located at the first water filling layer 51 and second water filling of water injection well
Between layer 52, mechanical-set packer 20 is set, then mechanical-set packer 20 is carried out to test envelope,
If without sealing between mechanical-set packer 20 and water filling casing 50, deblocking machinery sets packing
Device 20, position of the conversion mechanical-set packer 20 between the first water filling layer 51 and the second water filling layer 52
Put, mechanical-set packer 20 is set again, because mechanical-set packer 20 can realize that change place is more
It is secondary to set, therefore without separate layer water injection string is taken out from well, being capable of achieving to go into the well just can once make machinery
Sealed between set packer 20 and water filling casing 50.Wherein, mechanical-set packer 20 tests envelope
Process is：To blanking plug is put into the second injection well downhole flow regulator 42, the liquid in oil pipe 10 is set not match somebody with somebody from second
Flowed out in hydrophone 42, suppressed to water filling in oil pipe 10, liquid situation is returned in observation water filling casing 50,
If returning liquid in water filling casing 50, illustrate between mechanical-set packer 20 and water filling casing 50 not
Sealing, if not returning liquid in water filling casing 50, illustrates mechanical-set packer 20 and water filling casing
Sealed between 50.
After being sealed between mechanical-set packer 20 and water filling casing 50, hydraulic setting packing is set
Device 30, can carry out testing envelope to hydraulic setting packer 30, be with the separate layer water injection string shown in Fig. 1
Example, be to the concrete mode that hydraulic setting packer 30 test envelope：Put into in the first injection well downhole flow regulator 41
Blanking plug, takes out the blanking plug in the second injection well downhole flow regulator 42, is suppressed to water filling in oil pipe 10, due to machinery
Sealed between set packer 20 and water filling casing 50, therefore be by observing in water filling casing 50
Whether the no liquid that returns just can determine whether sealed between hydraulic setting packer 30 and water filling casing 50, if water filling
Liquid is returned in casing 50, then blow-by between hydraulic setting packer 30 and water filling casing 50, if note
Liquid is not returned in well sleeve pipe 50, is then sealed between hydraulic setting packer 30 and water filling casing 50, and
Without putting into pressure gauge in the second injection well downhole flow regulator 42, it is to avoid the water distribution of separate layer water injection string in the prior art
Pressure gauge is delivered in device to carry out testing envelope, and pressure gauge may measure inaccurate or pressure gauge and water distribution
Junction blow-by between device prevents measurement result from correctly judging whether sealing, therefore the present invention is real
Apply example separate layer water injection string test envelope it is more accurate.During separate layer water injection string is gone into the well, the first water distribution
There is no blanking plug in device 41, then no matter strata pressure just, tubing string external and internal pressure is balanced all the time, can be effective
Prevent the midway of hydraulic setting packer 30 from setting.
What deserves to be explained is, the setting for mechanical-set packer 20 of the top of the first water filling layer 51 is closed the most
Key, if the mechanical-set packer 20, between the hydraulic setting packer and water filling casing above that
It is relatively easy to sealing.
Separate layer water injection string provided in an embodiment of the present invention, in water filling casing during when,
First mechanical-set packer is set, then mechanical-set packer is carried out to test envelope, if machinery is sat
Blow-by between sealed packer and sleeve pipe, can unseal mechanical-set packer, convert mechanical-set packer
Position in sleeve pipe, re-starts and sets, until sealed between mechanical-set packer and sleeve pipe, so
Recoil sealing liquid pressure set packer, repeatedly sits because mechanical-set packer may be implemented in change place in sleeve pipe
Envelope, without separate layer water injection string is taken out from well, the machinery that just can once make of being capable of achieving to go into the well sets packing
Sealed between device and sleeve pipe, compared to existing technology any one hydraulic setting envelope on middle separate layer water injection string
If there is gap between device and sleeve pipe, be required for taking out separate layer water injection string from well, then again under
Well operations, the separate layer water injection string of the embodiment of the present invention reduces the probability that lift pipe string descends well operations again,
Operating efficiency can be improved, man-hour is saved.
On the basis of above-described embodiment, further, in actual applications, the machinery sets packing
Device 20 is compression mechanical-set packer, and the mechanical-set packer 20 is logical with the oil pipe 10
Cross one-way slip connection.
Further, as a kind of enforceable mode, the hydraulic setting packer 30 is compression liquid
Set packer, and the hydraulic setting packer 30 is pressed to be connected with the suspension of the oil pipe 10.
Specifically, the type of mechanical-set packer 20 is compression packer, and fixed form is unidirectional
Slips, mechanical-set packer 20 and one-way slip (can also be in other embodiments bi-directional slip)
Support the use, one-way slip (bi-directional slip) is stuck on water filling casing, and mechanical-set packer connects
On oil pipe；Mechanical-set packer 20 set mode specially handling tubing string or rotate tubing string；Machinery
The deblocking mode of set packer 20 is handling tubing string.Packer according to its packer accessory sealing means difference
Can be divided into：Self-sealing, compression, expanding, combined type etc., it is usually used in separate layer water injection string
Compression packer, according to the classification of packer, fixed form, sets mode and deblocking mode etc.,
Model can be worked out to packer, wherein above-mentioned mechanical-set packer 20 can using model Y211 or
The packer of Y221, is well packer capable of flushing well.
Specifically, the type of hydraulic setting packer 30 is compression packer, and fixed form is suspension,
Specifically, hydraulic setting packer 30 can be hung directly from oil pipe, and general packer need with
One-way slip (bi-directional slip) is supported the use, and one-way slip (bi-directional slip) is stuck on water filling casing,
And packer is connected on oil pipe；The mode that sets of hydraulic setting packer 30 is hydraulic pressure；Hydraulic setting is insulated
The deblocking mode of device 30 is handling tubing string.Wherein, above-mentioned hydraulic setting packer 30 can use model
It is the packer of Y341, is well packer capable of flushing well.
Further, as a kind of enforceable mode, first injection well downhole flow regulator 41 and second water distribution
Device 42 is eccentric injection mandrel.
Specifically, the first injection well downhole flow regulator 41 and second injection well downhole flow regulator 42 can be eccentric injection mandrel.It is eccentric
Injection well downhole flow regulator is mainly made up of seating nipple and blanking plug with eccentric orfice, is a kind of movable water-distributing tool, phase
It is higher than traditional injection well downhole flow regulator pulling water nozzle and blanking plug success rate.
Fig. 2 is the structural representation of another embodiment of separate layer water injection string of the present invention.In above-described embodiment
On the basis of, further, as shown in Fig. 2 when the quantity of hydraulic setting packer 30 is two, its
In, second water injection unit includes the injection well downhole flow regulator 43 of hydraulic setting packer 30 and the 3rd, the 3rd water distribution
Device 43 is connected on oil pipe 10, and between two hydraulic setting packers 30.Typically in actual feelings
Under condition, two packers and two injection well downhole flow regulators can be used on separate layer water injection string, realize that two-layer separates note
Three packers and three injection well downhole flow regulators can be used on water, or separate layer water injection string, three-layer partitioned is realized
Water filling, when three packers are used on the separate layer water injection string of the embodiment of the present invention, under oil pipe 10
End 11 direction to upper end 12 on, be connected with turn the first injection well downhole flow regulator 41, mechanical-set packer 20,
Second injection well downhole flow regulator 42, hydraulic setting packer 30, the 3rd injection well downhole flow regulator 43 and another hydraulic setting
Packer 30.
Further, above-mentioned separate layer water injection string also includes：Bottom cycle valve 60, bottom cycle valve
60 lower ends 11 for being connected to oil pipe 10.Bottom cycle valve 60 is also called bottom ball seat, installed in oil pipe
10 lower end 11 is oil pipe bottom when entering in water filling casing 50 under oil pipe 10, for well-flushing, when
From the water filling of sleeve pipe 50 during anti-flushing well, water energy is enough interior into oil pipe 10 by bottom cycle valve 60 and returns
Go out ground, and water can not be by the access wall bottom of bottom cycle valve 60 during positive injection.
Further, well anchor 71 and telescoping tube 72 are also associated with oil pipe 10, well anchor 71 is used for
Grappling separate layer water injection string, telescoping tube 72 is used to compensate the stroke of separate layer water injection string.
Separate layer water injection string provided in an embodiment of the present invention, in water filling casing during when,
First mechanical-set packer is set, then mechanical-set packer is carried out to test envelope, if machinery is sat
Blow-by between sealed packer and sleeve pipe, can unseal mechanical-set packer, convert mechanical-set packer
Position in sleeve pipe, re-starts and sets, until sealed between mechanical-set packer and sleeve pipe, so
Recoil sealing liquid pressure set packer, repeatedly sits because mechanical-set packer may be implemented in change place in sleeve pipe
Envelope, without separate layer water injection string is taken out from well, the machinery that just can once make of being capable of achieving to go into the well sets packing
Sealed between device and sleeve pipe, compared to existing technology any one hydraulic setting envelope on middle separate layer water injection string
If there is gap between device and sleeve pipe, be required for taking out separate layer water injection string from well, then again under
Well operations, the separate layer water injection string of the embodiment of the present invention reduces the probability that lift pipe string descends well operations again,
Operating efficiency can be improved, man-hour is saved.
Fig. 3 is the schematic flow sheet of the embodiment of application method one of separate layer water injection string of the present invention.Such as Fig. 3
It is shown, the application method of the separate layer water injection string of the present embodiment, be applied in any of the above-described embodiment point
In layer water injection string, including：
Step 301, the blanking plug taken out in first injection well downhole flow regulator；
Step 302, will enter in water filling casing under the oil pipe in the separate layer water injection string, make described point
Mechanical-set packer in layer water injection string be located at water injection well the first water filling layer and the water injection well the
Between two water fillings layer；
Step 303, the mechanical-set packer is set, make the mechanical-set packer with the note
Well bobbin seal；
Step 304, set the hydraulic setting packer.
Specifically, if having blanking plug in the first injection well downhole flow regulator, blanking plug is taken out, it is ensured that under oil pipe
There is no blanking plug in the first injection well downhole flow regulator when entering in water filling casing so that no matter strata pressure just, tubing string
External and internal pressure is balanced all the time, it is to avoid packer midway sets.
Wherein, the position in sleeve pipe where mechanical-set packer is in the first water filling layer of water injection well and second
Between water filling layer, for separating the first water filling layer and the second water filling layer.
Wherein, mechanical-set packer and hydraulic setting packer to set mode different, be capable of achieving difference
Set, first carry out step 303, make between mechanical-set packer and sleeve pipe after sealing, then perform step
Rapid 304 set hydraulic setting packer, are finally completed the installation of separate layer water injection string.
The application method of the separate layer water injection string that the present invention is provided, wherein separate layer water injection string are sat using machinery
Two kinds of packers of sealed packer and hydraulic setting packer, because mechanical-set packer and hydraulic setting are sealed
Mode difference is set every device, therefore can realize setting respectively, first set mechanical-set packer, protected
After being sealed between card mechanical-set packer and water filling casing, then hydraulic setting packer is set, compared
If in the presence of seam between any one the hydraulic setting packer and sleeve pipe in the prior art on separate layer water injection string
Gap, is required for taking out separate layer water injection string from well, then descends well operations again, the embodiment of the present invention
Mechanical-set packer can realize that change place repeatedly sets in well in separate layer water injection string, reduce pipe
Post descends the probability of well operations again, it is possible to increase operating efficiency, saves man-hour.
Fig. 4 is the schematic flow sheet of another embodiment of application method of separate layer water injection string of the present invention.As schemed
Shown in 4, the application method of the separate layer water injection string in an alternative embodiment of the invention, step 303, also
Comprise the following steps：
Step 3031, the mechanical-set packer is set, the mechanical-set packer is carried out to test envelope
Experiment；
If step 3032, testing testing sealing and determining the mechanical-set packer and described sleeve pipe blow-by,
The mechanical-set packer is unsealed, convert the mechanical-set packer in first water filling layer and
Position between the second water filling layer, sets the mechanical-set packer, until the machinery again
Set packer is sealed with described sleeve pipe.
Specifically, after setting mechanical-set packer, mechanical-set packer is carried out testing testing sealing,
Until judging mechanical-set packer and bobbin seal, envelope is set to the machinery wherein in step 3031
Carry out testing testing sealing every device and comprise the following steps：
Step 1, to putting into blanking plug in second injection well downhole flow regulator；
Specifically, this step is in order to prevent the liquid in oil pipe from being flowed out from the second injection well downhole flow regulator, to keep away
Exempt from correctly judge whether sealed between mechanical-set packer and sleeve pipe.
Step 2, suppressed to water filling in the oil pipe；
Specifically, suppressed to water filling in oil pipe, the water in oil pipe can flow into sleeve pipe from the first injection well downhole flow regulator
It is interior, whether the sealing situation between mechanical-set packer and sleeve pipe can be judged by returning liquid in sleeve pipe.
If returning liquid in step 3, the water filling casing, it is determined that the mechanical-set packer with it is described
Water filling casing blow-by；
If not returning liquid in the water filling casing, it is determined that the mechanical-set packer and the water injection well
Bobbin seal.
Specifically, judge whether return liquid in water filling casing after performing step 2.
When judged result is to be, mechanical-set packer and water filling casing blow-by are illustrated, it is determined that
The mechanical-set packer and the water filling casing blow-by, if judged result is no, illustrate machine
Tool set packer and water injection well bobbin seal, then set hydraulic setting packer.
When it is determined that the mechanical-set packer and the water filling casing blow-by, packing is set to machinery
Device is unsealed, position of the conversion mechanical-set packer between the first water filling layer and the second water filling layer, again
Set mechanical-set packer., it is necessary to set envelope to machinery after mechanical-set packer is set again
Carry out testing testing sealing again every device, due to it is previous test testing sealing in have been carried out matching somebody with somebody to described second
The step of blanking plug is put into hydrophone 1, therefore just directly can be suppressed to water filling in the oil pipe, judge note
Whether liquid is returned in well sleeve pipe.
The application method of the separate layer water injection string that the present invention is provided, wherein separate layer water injection string are sat using machinery
Two kinds of packers of sealed packer and hydraulic setting packer, because mechanical-set packer and hydraulic setting are sealed
Mode difference is set every device, therefore can realize setting respectively, seperated layer water injection is installed in water filling casing
During tubing string, first mechanical-set packer is set, then mechanical-set packer is carried out
Envelope is tested, if blow-by between mechanical-set packer and sleeve pipe, mechanical-set packer can be unsealed, converted
Position of the mechanical-set packer in sleeve pipe, re-starts and sets, until mechanical-set packer and set
Sealed between pipe, hydraulic setting packer is then set, because mechanical-set packer may be implemented in sleeve pipe
Interior change place repeatedly sets, and without separate layer water injection string is taken out from well, is capable of achieving to go into the well and once just can
Make to be sealed between mechanical-set packer and sleeve pipe, it is any on middle separate layer water injection string compared to existing technology
If there is gap between a hydraulic setting packer and sleeve pipe, it is required for separate layer water injection string from well
Take out, then descend the separate layer water injection string of well operations, the embodiment of the present invention to be reduced in installation process again
Lift pipe string descends the probability of well operations again, it is possible to increase operating efficiency, saves man-hour.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than right
Its limitation；Although being described in detail to the present invention with reference to foregoing embodiments, this area it is common
Technical staff should be understood：It can still modify to the technical scheme described in foregoing embodiments,
Or equivalent is carried out to which part or all technical characteristic；And these modifications or replacement, and
The scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution is not made.
Claims (9)
1. a kind of separate layer water injection string, it is characterised in that be applied in water filling casing, including：
Oil pipe, the first water injection unit, at least one second water injection units；
Wherein, the oil pipe is included along the lower end and upper end on the axial direction of the oil pipe, the lower end
It is the one end towards the water injection well sleeve bottom；
First water injection unit, including：Mechanical-set packer and the first injection well downhole flow regulator；Described first matches somebody with somebody
Hydrophone is connected to the lower end of the oil pipe, and the mechanical-set packer is arranged on first injection well downhole flow regulator
Top and it is connected with the oil pipe；
Second water injection unit, including：Hydraulic setting packer and the second injection well downhole flow regulator；Wherein, it is described
Second water injection unit is arranged on the top of the mechanical-set packer；Second injection well downhole flow regulator is arranged on institute
State between the water injection unit below the second water injection unit and the hydraulic setting packer, and with the oil pipe
Connection；The hydraulic setting packer is arranged on the top of second injection well downhole flow regulator, and connects with the oil pipe
Connect.
2. separate layer water injection string according to claim 1, it is characterised in that
The mechanical-set packer is compression mechanical-set packer, and the mechanical-set packer
It is connected by one-way slip with the oil pipe.
3. separate layer water injection string according to claim 2, it is characterised in that
The hydraulic setting packer is compression hydraulic setting packer, and the hydraulic setting packer
It is connected with the oil pipe suspension.
4. separate layer water injection string according to claim 3, it is characterised in that
First injection well downhole flow regulator and second injection well downhole flow regulator are eccentric injection mandrel.
5. separate layer water injection string according to any one of claim 1 to 4, it is characterised in that also
Including：
Bottom cycle valve, the bottom cycle valve is connected to the lower end of the oil pipe.
6. separate layer water injection string according to claim 5, it is characterised in that also include：
Well anchor, is connected on the oil pipe, for separate layer water injection string described in grappling；
Telescoping tube, is connected on the oil pipe, the stroke for compensating the separate layer water injection string.
7. a kind of application method of separate layer water injection string, it is characterised in that be applied to such as claim 1-6
In separate layer water injection string described in any one, methods described includes：
Take out the blanking plug in first injection well downhole flow regulator；
To enter in water filling casing under oil pipe in the separate layer water injection string, make the separate layer water injection string
In mechanical-set packer be located at the first water filling layer of water injection well and the second water filling layer of the water injection well
Between；
The mechanical-set packer is set, makes the mechanical-set packer close with the water filling casing
Envelope；
Set the hydraulic setting packer.
8. method according to claim 7, it is characterised in that described to set the machinery and set envelope
Every device, make the mechanical-set packer and the water injection well bobbin seal, including：
The mechanical-set packer is set, the mechanical-set packer is carried out to test testing sealing；
If testing testing sealing determines the mechanical-set packer and described sleeve pipe blow-by, to the machinery
Set packer is unsealed, and converts the mechanical-set packer in first water filling layer and second note
Position between water layer, sets the mechanical-set packer again, until the mechanical-set packer
Sealed with described sleeve pipe.
9. method according to claim 8, it is characterised in that enter to the mechanical-set packer
Row tests testing sealing, including：
To putting into blanking plug in second injection well downhole flow regulator；
Suppressed to water filling in the oil pipe；
Judge whether return liquid in water filling casing；If returning liquid in the water filling casing, it is determined that the machine
Tool set packer and the water filling casing blow-by；
If not returning liquid in the water filling casing, it is determined that the mechanical-set packer and the water injection well
Bobbin seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510855190.XA CN106812506A (en) | 2015-11-30 | 2015-11-30 | Separate layer water injection string and application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510855190.XA CN106812506A (en) | 2015-11-30 | 2015-11-30 | Separate layer water injection string and application method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106812506A true CN106812506A (en) | 2017-06-09 |
Family
ID=59155585
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510855190.XA Pending CN106812506A (en) | 2015-11-30 | 2015-11-30 | Separate layer water injection string and application method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2625575Y (en) * | 2003-06-04 | 2004-07-14 | 中国海洋石油总公司 | Stratified waterflooding apparatus for gravel sand prevention water injection well of offshore oil field |
| CN201915926U (en) * | 2011-01-04 | 2011-08-03 | 刘卫 | Peristalsis-preventive water injection tubular column |
| CN202832438U (en) * | 2012-08-23 | 2013-03-27 | 中国石油天然气股份有限公司 | Deep well long-lasting separated layer water injection tubular column |
| CN103075135A (en) * | 2013-01-10 | 2013-05-01 | 中国石油天然气股份有限公司 | Compensator for water injection pipe |
| WO2013154360A2 (en) * | 2012-04-13 | 2013-10-17 | Kim Yun Seong | Water leak-detecting ground water pressure testing apparatus |
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2015
- 2015-11-30 CN CN201510855190.XA patent/CN106812506A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2625575Y (en) * | 2003-06-04 | 2004-07-14 | 中国海洋石油总公司 | Stratified waterflooding apparatus for gravel sand prevention water injection well of offshore oil field |
| CN201915926U (en) * | 2011-01-04 | 2011-08-03 | 刘卫 | Peristalsis-preventive water injection tubular column |
| WO2013154360A2 (en) * | 2012-04-13 | 2013-10-17 | Kim Yun Seong | Water leak-detecting ground water pressure testing apparatus |
| CN202832438U (en) * | 2012-08-23 | 2013-03-27 | 中国石油天然气股份有限公司 | Deep well long-lasting separated layer water injection tubular column |
| CN103075135A (en) * | 2013-01-10 | 2013-05-01 | 中国石油天然气股份有限公司 | Compensator for water injection pipe |
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Application publication date: 20170609 |
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