CN105178947B - A kind of horizontal well looks for water blockoff integral method - Google Patents
A kind of horizontal well looks for water blockoff integral method Download PDFInfo
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Abstract
The invention provides a kind of horizontal well to look for water blockoff integral method, and step includes：1st, hole angle is more than 45 ° and net horizontal section uses box cupling chamfering oil pipe, and all switch is in open mode；2nd, suppressed from oil pipe, pressure passes to oil pipe under pump by insert pump support base, and controllable cup packer packing element discharges opening under hydraulic action, realized setting；3rd, wellhead sampling, the type and content of tracer in production fluid is analyzed, determines water exit end；4th, water is filled from well head by sleeve pipe, is then suppressed according to instruction, pressure wave is passed to oil pumping through ball-and-seat and is pumped into end oil pipe, and water exit end switch is closed automatically after being connected to instruction.When needing to block again, ground repeats operation above and closed step by step.Water detecting and plugging pipe column is made up of packer, the tracer device of storing different model, control taps etc., and every section of production layer position is opened using packer card, and water exit end can be judged according to tracer in production fluid, is closed corresponding section and is switched, realizes the purpose looked for and block up integration.
Description
Technical field
The present invention relates to the underground in oil field development to look for shutoff method technical field, and more particularly to a kind of horizontal well looks for water blockoff
Integral method, applied to horizontal well water exploration and closure High water cut section etc..
Background technology
As horizontal well development scale constantly expands, extend oil well with the development time improving oil recovery rate and facing simultaneously
The problem of water breakthrough, oil well productivity declines rapidly after water breakthrough, needs badly and carries out water detection measure, could targetedly implement water blockoff.Pass
The horizontal well machinery water detection technology of system uses packer sealing test zone, is controlled and produced by derailing switch, finds water exit position.Should
Method must can sample after formation fluid discharges pit shaft, long for the more horizontal well of transformation hop count, measure period.At present
Conventional looks for shutoff method to have the following disadvantages：
1. first segmentation production, judges High water cut section；
2. tripping in packer and tubing string are blocked, activity duration length, complex procedures.
The content of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, there is provided a kind of horizontal well looks for water blockoff integration side
Method, realize that horizontal well normally produces, wellhead sampling, water exit end, water exit end switch basis are judged according to tracer type and content
Instruction is operated, and water blockoff integral process is looked in realization, and reliable basis are provided for horizontal well water and oil control measure.
The technical scheme is that：A kind of horizontal well looks for water blockoff integral method, comprises the following steps：
Step 1：Handle pit shaft：The step includes drifting, sand-flushing and scraping sleeve pipe；
Step 2：Connect tubing string：It is more than 45 ° in hole angle and net horizontal section uses box cupling chamfering oil pipe, all switch is in
Open mode；
Step 3：Running string：Oil pipe is passed sequentially through from top to bottom is sequentially connected each production layer position device, every section of production layer
Position device is made up of oil base tracer device, control taps, water base tracer device oil pipe connection from top to bottom, wherein oil
Base tracer device and water base tracer device are an annular canister, and upper and lower ends are connected with oil pipe；Every section of production layer position device
Between connected using controllable cup packer through oil pipe, the bottom of tubing string passes through oil pipe and connects plug, the production layer of the top
Position device is sequentially connected controllable cup packer, telescopic joint and ball-and-seat, oil well pump by oil pipe from bottom to up, ball-and-seat,
Oil well pump is connected to well head by oil pipe；Wherein oil base tracer device and water base tracer device put the tracer of different model
Agent；
Step 4：Base sealed packer：Suppressed from oil pipe, by insert pump support base, i.e. pump barrel, ball seat, pressure is passed under pump
Oil pipe, controllable cup packer packing element discharge opening under hydraulic action, realized setting；
Step 5：Completion produces：Lower insert pump pitching lower sucker rod completion；
Step 6：Judge water exit end：Wellhead sampling, the type of oil base tracer and water base tracer is tested from production fluid
And concentration, production fluid reclaimed water, the concentration of oil are determined, the oil-water ratio of product fluid is obtained on this basis, determines water exit end；
Step 7：Block water exit end：Water is filled from well head by sleeve pipe, is then suppressed according to instruction, wherein the pressure suppressed
More than 2-5MPa, pressure wave is passed to oil pumping through ball-and-seat and is pumped into end oil pipe, and water exit end switch is closed automatically after being connected to instruction；When need
When blocking again, the operation that ground repeats the above is closed step by step.
The packing element of above-mentioned controllable cup packer is controllable type, and maximum outside diameter is less than casing inner diameter when packing element shrinks
The tripping in of tubing string is not influenceed, and maximum outside diameter realizes interference seal more than casing inner diameter in underground when packing element discharges；Cup packer
Mainly it is sequentially connected and is formed by top connection component, leather cup component and lower contact component, a piston bore is provided with lower contact component,
Realize hydraulic setting and deblocking and multistage use.
Above-mentioned control taps is by the pipe nipple of tubular and the battery in the pipe nipple, pressure gauge, microprocessor, driving machine
Structure, connecting rod, closure switch are formed, and wherein battery is electrically connected and powered with pressure gauge, microprocessor, drive mechanism respectively；Micro- place
Reason device is connected with pressure gauge, drive mechanism respectively；Drive mechanism, connecting rod and closure switch are sequentially connected；The control taps with
Lead to oil channel provided with layer position oil channel and levels bit string, the connecting seat that indoor design is provided with check valve passes through silk mouth phase
Connect and be integrated and form.
Above-mentioned tracer is solid tracers, including oil base tracer and water base tracer, according to 1:The mixing of 1 ratio is mounted in
In annular canister, it is placed on and corresponds to pay interval, in production process, is contacted with downhole fluid, wherein oil base tracer is dissolved in oil, water
Base tracer is dissolved in water, and the tracer of different model is independent of each other.
Above-mentioned oil well pump uses insert pump, telescopic joint uncompensation distance is in interposition to above carrying after design attitude under tubing string
Put, prevent controllable cup packer from wriggling.
Beneficial effects of the present invention：This horizontal well provided by the invention looks for water blockoff integral method, during water detection
Quan Jinghe is arranged, and water exit end can be judged according to tracer in production fluid, is closed water exit end switch, is realized the mesh for looking for water blockoff integration
's.The present invention uses downhole tracer mode, judges High water cut interval, and timely and effective closure High water cut section.Downhole packer,
Water is filled from well head by sleeve pipe, is then suppressed according to instruction, pressure wave is passed to oil pumping by ball-and-seat and is pumped into end oil pipe, and water exit end is opened
Pass is closed automatically after being connected to instruction.When needing to block again, ground repeats operation above and closes water exit end paragraph by paragraph.The present invention
Oil base tracer device, control taps, water base tracer device, controllable cup packer are brought into target zone using oil pipe, are sealed
Every device sealing test interval, one-trip string is completed to look for water blockoff function, and testing efficiency is high, and process is simple.It can be applied to middle High water cut
Horizontal well judges that water level postpones, and intelligence blocks High water cut interval, and then takes water and oil control measure.
Brief description of the drawings
Fig. 1 is the tubing string general structure schematic diagram that horizontal well looks for water blockoff integral method；
Fig. 2 is that horizontal well looks for water blockoff integrated pipe column structure chart；
Fig. 3 is horizontal well hydraulic control instruction oscillogram；
Fig. 4 is control structure of water tap figure.
Description of reference numerals：1st, oil well pump;2nd, ball-and-seat;3rd, telescopic joint;4th, controllable cup packer one;5th, water base tracer
Agent A;6th, taps one is controlled;7th, oil base tracer B;9th, water base tracer X;10th, taps N is controlled;11st, oil base tracer Y；12、
Pipe nipple;13rd, circuit part;14th, drive mechanism;15th, connecting rod;16th, O-ring seal;17th, closure switch;18th, fluid hole;19th, become
Buckle joint;20th, pressure gauge;21st, inlet opening;22nd, intercommunicating pore;23rd, connecting seat.
The present invention is described in further details below with reference to accompanying drawing.
Embodiment
Embodiment 1：
Referring to Fig. 1 and Fig. 2, the invention provides a kind of horizontal well to look for water blockoff integral method, comprises the following steps：
Step 1：Handle pit shaft：The step includes drifting, sand-flushing and scraping sleeve pipe；
Step 2：Connect tubing string：It is more than 45 ° in hole angle and net horizontal section uses box cupling chamfering oil pipe, all switch is in
Open mode；
Step 3：Running string：Oil pipe is passed sequentially through from top to bottom is sequentially connected each production layer position device, every section of production layer
Position device is made up of oil base tracer device, control taps, water base tracer device oil pipe connection from top to bottom, wherein oil
Base tracer device and water base tracer device are an annular canister, and upper and lower ends are connected with oil pipe；Every section of production layer position device
Between connected using controllable cup packer through oil pipe, the bottom of tubing string passes through oil pipe and connects plug, the production layer of the top
Position device is sequentially connected controllable cup packer, telescopic joint and ball-and-seat, oil well pump by oil pipe, and ball-and-seat, oil well pump lead to
Cross oil pipe and be connected to well head；Wherein oil base tracer device and water base tracer device put the tracer of different model；Wherein
Maximum outside diameter is less than the tripping in that casing inner diameter does not influence tubing string when packing element shrinks, and maximum outside diameter is more than casing inner diameter when packing element discharges
Interference seal is realized in underground；As illustrated, the tubing string of the present embodiment is made up of such as lower part successively from top to bottom：Oil well pump 1,
Ball-and-seat 2, flexible 3, controllable cup packer 1, water base tracer A5, control taps 1, oil base tracer B7 ...
Controllable cup packer two, water base tracer X9, control taps N10, oil base tracer 11 and plug.
Step 4：Base sealed packer：Suppressed from oil pipe, by insert pump support base, i.e. pump barrel, ball seat, pressure is passed under pump
Oil pipe, controllable cup packer packing element discharge opening under hydraulic action, realized setting；Accompanying drawing 3 is that horizontal well hydraulic control refers to
Make oscillogram.
Step 5：Completion produces：Lower insert pump pitching lower sucker rod completion；
Step 6：Judge water exit end：Wellhead sampling, the type and content of tracer in production fluid are analyzed, determines water exit end；
The type and concentration of oil base tracer and water base tracer are tested i.e. from production fluid, determines production fluid reclaimed water, the concentration of oil,
It is aqueous that product fluid is obtained on the basis of this（Oil-water ratio）, determine water exit end；
Step 7：Block water exit end：Water is filled from well head by sleeve pipe, is then suppressed according to instruction, wherein the pressure suppressed
More than pressure threshold 2-5MPa, the pressure threshold is depths pressure under forecasting tool, and pressure wave is passed to oil pumping through ball-and-seat and is pumped into
Oil pipe, water exit end switch is held to be closed automatically after being connected to instruction；When needing to block again, the operation that ground repeats the above is closed step by step
Close.
Embodiment 2：
On the basis of embodiment 1, the packing element of the controllable cup packer is controllable type, when packing element shrinks most
Big external diameter is less than the tripping in that casing inner diameter does not influence tubing string, and maximum outside diameter was realized more than casing inner diameter in underground when packing element discharges
It is full of sealing；Cup packer is mainly sequentially connected and formed by top connection component, leather cup component and lower contact component, lower contact component
In be provided with a piston bore, realize hydraulic setting and deblocking and multistage use.
As shown in figure 4, control taps is mainly by the pipe nipple 12 of tubular, and battery in the pipe nipple, pressure gauge 20,
Microprocessor, drive mechanism 14, connecting rod 15, closure switch 17 form, wherein battery respectively with pressure gauge 20, microprocessor, drive
Motivation structure 14 is electrically connected and powered；Microprocessor is connected with pressure gauge 20, drive mechanism 14 respectively；Drive mechanism 14, connecting rod 15
And closure switch 17 is sequentially connected；The control taps is interior with leading to oil channel provided with layer position oil channel and levels bit string
The connecting seat that portion's design and installation has check valve is connected with each other by silk mouth to be integrated to form.Specifically marked in figure positioned at control water
Switch the pipe nipple 12 of upper end, the circuit part 13 including battery, microprocessor, drive mechanism 14, connecting rod 15, by piston and
The closure of piston cylinder composition switchs O-ring seal 16, the fluid hole in piston cylinder side wall of 17, sealing piston and piston cylinder
18th, the change buckle joint 19 of connecting short section 12 and connecting seat 23, layer position oil channel inlet opening 21, gang up connecting for oil channel
Hole 22 and position positioned at control taps lower end pressure gauge 20, etc. each part, wherein closure switch 17 is a piston；Should
Control structure of water tap refers to patent：DH intellectual contactor, its patent No.：ZL200720084805.The tool of the drive mechanism
Body structure refers to patent：A kind of DH intellectual contactor, its patent No.：ZL 2012203805761, the closure in the patent
Driving structure for opening/closing is identical with the present embodiment, is no longer described in detail herein.
1. by the state of pressure waveform controlling switch, one group of corresponding pulsed pressure wave is injected on ground, it is corresponding
Switch receives pressure signal, according to signal automatic control switch；
2. every grade of switch has different Stress control codings, it can accurately receive pressure wave signal；
3. switch carries ball-and-seat, it is ensured that oil pipe interior sealing when suppressing.
Intelligent switch device switch order " suppressing-release-to suppress " operates；After derailing switch receives and identifies instruction, by finger
Order requires that generation acts, and opens the layer for needing to produce, and closes the layer that need not be produced.
The tracer is solid tracers, including oil base tracer and water base tracer, and ring is mounted in after tracer solidification
In shape cylinder, it is placed on and corresponds to pay interval, in production process, is contacted with downhole fluid, wherein oil base tracer is dissolved in oil, water base
Tracer is dissolved in water, and the tracer of different model is independent of each other.The oil well pump uses insert pump, to after design attitude under tubing string
Above carrying makes telescopic joint uncompensation distance in an intermediate position, prevents controllable cup packer from wriggling.
The tracer is solid tracers, including oil base tracer and water base tracer, according to 1:The mixing of 1 ratio is mounted in
In annular canister, it is placed on and corresponds to pay interval, in production process, is contacted with downhole fluid, wherein oil base tracer is dissolved in oil, water
Base tracer is dissolved in water, and the tracer of different model is independent of each other.
The oil well pump uses insert pump, telescopic joint uncompensation distance is in interposition to above carrying after design attitude under tubing string
Put, prevent controllable cup packer from wriggling.
Below in conjunction with accompanying drawing of the present invention, by taking Changqing oilfields a bite horizontal well as an example to the present invention in underground sectional sampling control
Method processed is clearly and completely described.
The horizontal well is a bite pressure break horizontal well, 5 sections of fracturing reform, by analyzing flooding pattern and current mining by its stroke
It is divided into 3 sections of progress underground sectional sampling water detections.
Step I：Handle pit shaft.Hole deviation depth 3090m, horizontal section length 800m, casing inner diameter 124.26mm, uses Φ
The drifting of 118mm × 1.5m gauguste cutters is to artificial bottom of a well, backwash sand washing, sand-flushing to artificial bottom of a well, with Φ 134mm sleeve pipe scrapings
Device carries out scraping to full well section internal surface of sleeve pipe.
Step II：Connect tubing string.From top to bottom successively by plug+oil pipe+oil base tracer device+control taps+water base
Tracer device+controllable cup packer+oil pipe+...+controllable cup packer+telescopic joint+ball-and-seat+oil well pump+oil pipe is extremely
Well head.Hole angle is more than 45 ° and net horizontal section uses box cupling chamfering oil pipe, and all switch is in open mode.
Tracer operation principle：
After tracer solidification in annular canister, it is placed on and corresponds to pay interval, in production process, is connect with downhole fluid
Touch, oil base tracer is dissolved in oil, and water base tracer is dissolved in water, and the tracer of different model is independent of each other.
Control taps operation principle：
1. by the state of pressure waveform controlling switch, one group of corresponding pulsed pressure wave is injected on ground, it is corresponding
Switch receives pressure signal, according to signal automatic control switch；
2. every grade of switch has different Stress control codings, it can accurately receive pressure wave signal；
3. switch carries ball-and-seat, it is ensured that oil pipe interior sealing when suppressing.
Step III：Running string.Oil well pump uses insert pump, under tubing string to above carry after design attitude make telescopic joint compensation away from
From in an intermediate position, prevent packer from wriggling.
The present embodiment control structure of water tap used（Accompanying drawing 4）, it is made up of control section and circuit part.Above-mentioned control unit
Dividing includes the compositions such as driving mechanism, connecting rod, fluid hole, change buckle joint, inlet opening, intercommunicating pore, connecting seat.
Above-mentioned control taps switch order " suppressing-release-to suppress " operation.After derailing switch receives and identifies instruction, press
Instruction requires that generation acts, and opens the layer for needing to produce, and closes the layer that need not be produced.
Step IV：Base sealed packer.Suppressed from oil pipe, pressure passes through insert pump support base（Pump barrel, ball seat）Pass under pump
Oil pipe, controllable cup packer packing element discharge opening under hydraulic action, realized setting.
Step V：Completion produces.Lower insert pump pitching lower sucker rod completion.
Step VI：Judge water exit interval.Wellhead sampling, the type and content of tracer in production fluid are analyzed, determines water outlet
Section.
Step VII：Block water exit end.Water is filled from well head by sleeve pipe, is then suppressed according to instruction, pressure wave is through ball-and-seat
Incoming oil pumping is pumped into end oil pipe, and water exit end switch is closed automatically after being connected to instruction.When needing to block again, ground repeats above
Operation close step by step.
There is no the known conventional means of the part category industry described in detail in present embodiment, do not chat one by one here
State.It is exemplified as above be only to the present invention for example, do not form the limitation to protection scope of the present invention, it is every with this
Same or analogous design is invented to belong within protection scope of the present invention.
Claims (5)
1. a kind of horizontal well looks for water blockoff integral method, it is characterised in that comprises the following steps：
Step 1：Handle pit shaft：The step includes drifting, sand-flushing and scraping sleeve pipe；
Step 2：Connect tubing string：It is more than 45 ° in hole angle and net horizontal section uses box cupling chamfering oil pipe, all switch is in opening
State；
Step 3：Running string：Oil pipe is passed sequentially through from top to bottom is sequentially connected each production layer position device, every section of production layer position dress
Put and be made up of from top to bottom oil base tracer device, control taps, water base tracer device oil pipe connection, wherein oil base shows
Track agent device and water base tracer device are an annular canister, and upper and lower ends are connected with oil pipe；Between every section of production layer position device
Connected using controllable cup packer through oil pipe, the bottom of tubing string connects plug, the production layer position dress of the top by oil pipe
Put and be sequentially connected controllable cup packer, telescopic joint and ball-and-seat, oil well pump from bottom to up by oil pipe, ball-and-seat, oil pumping
Pump is connected to well head by oil pipe；Wherein oil base tracer device and water base tracer device put the tracer of different model；
In production process, contacted with downhole fluid, oil base tracer is dissolved in oil, and water base tracer is dissolved in water, the tracer of different model
It is independent of each other；
Step 4：Base sealed packer：Suppressed from oil pipe, by insert pump support base, i.e. pump barrel, ball seat, pressure passes to oily under pump
Pipe, controllable cup packer packing element discharge opening under hydraulic action, realized setting；
Step 5：Completion produces：Lower insert pump pitching lower sucker rod completion；
Step 6：Judge water exit end：Wellhead sampling, the type of oil base tracer and water base tracer and dense is tested from production fluid
Degree, production fluid reclaimed water, the concentration of oil are determined, the oil-water ratio of product fluid is obtained on this basis, determines water exit end；
Step 7：Block water exit end：Water is filled from well head by sleeve pipe, is then suppressed according to instruction, wherein the pressure suppressed is more than
2-5MPa, pressure wave are passed to oil pumping through ball-and-seat and are pumped into end oil pipe, and water exit end switch is closed automatically after being connected to instruction；When need again
During secondary closure, the operation that ground repeats the above is closed step by step.
2. a kind of horizontal well as claimed in claim 1 looks for water blockoff integral method, it is characterised in that the controllable leather cup packing
The packing element of device is controllable type, and maximum outside diameter is less than the tripping in that casing inner diameter does not influence tubing string when packing element shrinks, and packing element is released
Maximum outside diameter realizes interference seal more than casing inner diameter in underground when putting；Cup packer connects leather cup by top connection, and leather cup connects
Lower contact composition is connect, a piston bore is provided with lower contact, realizes hydraulic setting and deblocking and multistage use.
3. a kind of horizontal well as claimed in claim 1 looks for water blockoff integral method, it is characterised in that the control taps is by cylinder
The pipe nipple of shape（12）And battery, pressure gauge in the pipe nipple（20）, microprocessor, drive mechanism（14）, connecting rod（15）、
Closure switch（17）Form, wherein battery respectively with pressure gauge（20）, microprocessor, drive mechanism（14）Electrically connect and power；
Microprocessor respectively with pressure gauge（20）, drive mechanism（14）Connection；Drive mechanism（14）Connect connecting rod（15）, connecting rod（15）Even
Connect closure switch（17）；The control taps provided with layer position oil channel and levels bit string with leading to oil channel, indoor design peace
Connecting seat equipped with check valve is connected with each other by silk mouth and is integrated to form.
4. a kind of horizontal well as claimed in claim 1 looks for water blockoff integral method, it is characterised in that the tracer is solid
Tracer, including oil base tracer and water base tracer, according to 1:The mixing of 1 ratio is placed on corresponding production in annular canister
Interval, in production process, contacted with downhole fluid, wherein oil base tracer is dissolved in oil, and water base tracer is dissolved in water, different model
Tracer be independent of each other.
5. a kind of horizontal well as claimed in claim 1 looks for water blockoff integral method, it is characterised in that the oil well pump uses bar
Formula pump, make telescopic joint uncompensation distance in an intermediate position to above carrying after design attitude under tubing string, prevent that controllable cup packer is compacted
It is dynamic.
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| CN201510598477.9A CN105178947B (en) | 2015-09-18 | 2015-09-18 | A kind of horizontal well looks for water blockoff integral method |
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| CN201510598477.9A CN105178947B (en) | 2015-09-18 | 2015-09-18 | A kind of horizontal well looks for water blockoff integral method |
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| CN202596684U (en) * | 2012-06-08 | 2012-12-12 | 中国石油天然气股份有限公司 | Testing process pipe column for casing pipe well completion horizontal well multistage subsection production and water detection |
| CN104100234B (en) * | 2013-04-03 | 2016-12-28 | 中国石油天然气股份有限公司 | Multistage pressure break horizontal well in segments samples searching pipe column and method of work thereof simultaneously |
| CN104121013B (en) * | 2013-04-25 | 2016-08-17 | 中国石油化工股份有限公司 | For the water detection device of horizontal well and use its method determining water exit position |
| CN204252844U (en) * | 2014-10-23 | 2015-04-08 | 中国石油天然气股份有限公司 | A kind of horizontal well tubing string and horizontal well |
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2015
- 2015-09-18 CN CN201510598477.9A patent/CN105178947B/en active Active
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