CN106351605A - Drilling method of second-spudding horizontal well - Google Patents
Drilling method of second-spudding horizontal well Download PDFInfo
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- CN106351605A CN106351605A CN201610853960.1A CN201610853960A CN106351605A CN 106351605 A CN106351605 A CN 106351605A CN 201610853960 A CN201610853960 A CN 201610853960A CN 106351605 A CN106351605 A CN 106351605A
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- well
- boiled water
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- seat
- sliding sleeve
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/122—Multiple string packers
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
- E21B33/1285—Packers; Plugs with a member expanded radially by axial pressure by fluid pressure
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Abstract
The invention discloses a drilling method of a second-spudding horizontal well. The method comprises steps as follows: a, a drill bit with an outer diameter of 346 mm is adopted for first spudding; b, a drill bit with the outer diameter of 222 mm is adopted to complete drilling of a second-spudding vertical shaft section, a drill bit with the outer diameter of 215.9 mm is adopted to complete drilling at a second-spudding inclined shaft section and a second-spudding horizontal section, and well drifting is performed; c, a second-spudding horizontal well cementation and completion integrated string device is tripped in; d, clear water and lead slurry of cement slurry are injected, and tail slurry of the cement slurry is injected; e, 4-5 m<3> of clear water, 2-3 m<3> of a spacer fluid and 2-3 m<3> of clear water are injected; f, a potassium chloride solution is injected to replace mud, a spacer fluid is injected again, and a 41.3 mm setting ball is thrown; g, 50-60 m<3> of the potassium chloride solution is injected; h, waiting on cement setting is performed for 48 h, and second-spudding drilling of the horizontal well is completed. When an inclination angle and the physical property of a reservoir change greatly, locus adjustment in a larger range can be realized, the flexibility is high, the well cementation construction difficulty is low, and the well cementation quality is good.
Description
Technical field
The present invention relates to drilling engineering technical field, more particularly, to a kind of two boiled water horizontal well boring methods.
Background technology
Drilling well in oil-gas mining mainly includes creeping into engineering and Well Completion Engineering of Oil Reservoirs.
Drilling engineering is exactly to be drilled into exploration and development target zone from spudding in, is drilled the drilling process of full well drilling depth.Spud in, be
After entering conduit or each layer sleeve pipe under finger, first drill bit starts drilling.
Drilling can be divided into spuds in, spuds in for the second time, spudding in for the third time for the first time.A bite well from well depth be zero start bore
Enter, claim to spud in for the first time, referred to as one opens；Spud in again after surface pipe well cementation, claim to spud in for the second time, referred to as two open；Technology set
Pipe spuds in after having cemented the well again, claims third time to spud in, referred to as three open；As protective casing have two-layer, three layers, then also have four open, five
Open.Drilling engineering to the effect that: drilling make a trip, drilling and coring delivery, and in drilling well with well cementation, well logging, well logging and the borehole wall
Core, the cooperating of drillstem test.Drilling fluid, pipe, the technical service of Special Drilling Operation are through the overall process crept into.Drilling
Engineering is the major project of drilling well, its engineering technology level and quality, and each correlation work post, technical service, each link of drilling well
The coordination linking cooperation of work, is safety drilling, shortens drilling period, reduce material consumption, determine engineering cost height and survey
Visit the key of returns of investment height.
One open specifically include that brill top layer, layer sleeve pipe, well cementation；Dress well head；Pressure testing；The installation of blowout control equipment.Two open master
Including: drilling；Drillstem test；Under enter protective casing and cement the well.Three open and specifically include that installation well head, pressure testing；Drilling, brill leaves
Oil-gas Layer；Completion logging；Lower production casing is simultaneously cemented the well.
Well Completion Engineering of Oil Reservoirs is from the beginning of oil reservoir left by brill, to setting of casing cementing well, perforation, lower flow string, discharge opeing, until
The systematic engineering of business gone into operation.Major project content is: completion logging, and the production string such as sidewall coring, setting of casing, cementing is solid
Well, survey sound width, pressure testing, dress wellhead assembly etc..The events in operation such as completion phase well logging, test are many, and consumption of materials is big, and expense is sent out
Life is many, the cased hole of particularly multilamellar, can make drilling cost at double or several times of rising.Completion is also down-hole complexity and accident
The quality in multiple stage, particularly cementing quality is directly connected to success and the failure of a bite well.
At present, horizontal well is many spuds in into mode using three.The horizontal well development implemented at present, horizontal section length is from 600 meters
To 3056 meters, wherein most well horizontal segments, in 1000-1500 rice, going deep into development process, can arrange longer level
The Favorable Zones of section tail off, and in order to effectively employ, class reservoir, realize the purpose of cost efficiency, main arrangement 400-600 rice
Short horizontal segment well reservoir because horizontal segment is longer, the technical barrier running into will be more.
Spud in into the horizontal well of mode using three, wherein two exploitations are solid at the initiating terminal of horizontal segment with entering under 7 inches of sleeve pipes
Well, three exploitation with 6 inch drill bit complete horizontal segment drilling, completion using under enter 5 inches of casing cementings or under enter 3.5 inches of bore holes
Packer combines, then reservoir is implemented go into operation after transformation.Three spud in into mode: in existing, the complete time is long, bore completion period length, storage
Layer is transformed cycle length, is changed it is impossible to implement extensive spatial cuboids depth to reservoir because the little factor of completion tubular column size limits
Make, limited by reservoir reconstruction effect, development cost are high, meanwhile, because completion tubular column size is little, cannot be to horizontal segment in the later stage produces
Implement the technological measures such as well workover, water blockoff, refracturing transformation, be unfavorable for economy, the Efficient Development of horizontal well.
Publication No. cn 105587309a, publication date is that the Chinese patent literature of on 05 18th, 2016 discloses one kind
The boring method of horizontal well is it is characterised in that described boring method comprises the following steps: s1, detects magnetic declination value and well rail
Trace displacement value；S2, eliminates the impact to described well track deviant for the described magnetic biasing angle value using mwd system, obtains drill bit and return
Return track；S3, returns trajectory corrector drill bit drilling direction according to described drill bit；S4, continues drilling well using described drill bit.
The boring method of horizontal well disclosed in this patent documentation, by eliminating error and the multiple rectification brill that magnetic declination causes
Head drilling direction is it is achieved that wellbore trace and the preferable coincidence factor of desired trajectory；But, have following defects that 1, horizontal segment bores
Well construction be front once cement the well after start, bit size little than lower curved section differential it is impossible to realize lower curved section and horizontal segment
Carry out drillng operation with same size size drill bit；2nd, when reservoir inclination angle, reservoir properties occur large change, can only be in little model
It is adjusted in enclosing it is impossible to flexibly enter the larger track adjustment of line amplitude；3rd, it is unilateral to meet or reach by former Drilling Design
The purpose of construction, and when reservoir changes greatly, want to get out a gas channel in the reservoir rich in oil gas, think that change is bored
During well design, but cannot realize.
Content of the invention
The present invention in order to overcome the defect of above-mentioned prior art, provides a kind of two boiled water horizontal well boring methods, the present invention, with
One drill bit can complete two and open the drilling that lower curved section and two opens horizontal segment, effectively increase rate of penetration, when reservoir inclination angle, reservoir
When physical property occurs large change, the larger track adjustment of line amplitude can be entered, motility is strong, and cementing operation difficulty is low, cementing quality
Good.
The present invention is achieved through the following technical solutions:
A kind of two boiled water horizontal well boring methods are it is characterised in that comprise the following steps:
A, an exploitation external diameter are that the drill bit of 346mm completes, and then enter down the sleeve pipe that external diameter is 273mm, complete to cement the well；
B, using external diameter, the drill bit for 222mm completes two drillings opening straight well section, then pulls out of hole；Using external diameter it is again
The drill bit of 215.9mm completes two and opens the drilling that lower curved section and two opens horizontal segment；After two end brill, drifting；
After c, drifting, under enter the solid completion integral tubular column unit of two boiled water horizontal wells；
D, rinse ground well cementation pipeline, injected clear water and cement mortar neck slurry, after interval time t 1, reinject cement mortar tail
Oar；
After e, interval time t2, then it is implanted sequentially 4-5m3Clear water, inject 2-3m3Insulating liquid, 2-3m3Clear water；
After f, interval time t3, injection Klorvess Liquid replaces mud, then re-injects insulating liquid, interval time t4
Afterwards, throw one, the setting ball of a diameter of 41.3mm；
G, reinject 50-60m3Klorvess Liquid, observe pump pressure change, pump pressure raises suddenly, judges that setting ball puts in place,
Now cement mortar bottom has reached more than the initiating terminal of horizontal segment；Continue injection Klorvess Liquid 45-55m3, so that injection pressure is reached
To 38-42mpa, the whole one-shot of all open hole packers, realize sealing；
Solidifying 48 hours of h, time, complete two and open horizontal well drilling.
Described two boiled water horizontal wells completion integral tubular column unit admittedly, the tubing string including sleeve pipe, being located in sleeve pipe, tubing string are from upper
To under be made up of vertical section, tilting section and horizontal segment, the pitching sliding sleeve that is arranged on horizontal segment, pressure reduction sliding sleeve, open hole packer
And float shoe, also include float collar and self-styled ball seat, open hole packer at least three, set between the adjacent open hole packer of any two
Be equipped with a pitching sliding sleeve, tubing string pass sequentially through from top to bottom float shoe described in screwed connection, float collar, self-styled ball seat, pressure reduction sliding sleeve,
Open hole packer and pitching sliding sleeve.
The external diameter of the pitching sliding sleeve setting gradually from top to bottom along tubing string is identical, and internal diameter is gradually increased.
Described self-styled ball seat includes the ball-and-seat linking together and seat of receiving, and seat of receiving is located at the top of ball-and-seat.
In described step d, clear water is 4-5m3, the density of cement mortar neck slurry is 1.4-1.5kg/m3.
In described step d, time t1 is 1 minute, and the injection rate of cement mortar tail-rotor is 17-25m3, cement mortar tail-rotor close
Spend for 1.85-1.92kg/m3.
In described step e, time t2 is 1 minute.
In described step f, time t3 is 1 minute, and Klorvess Liquid injection rate is 25-30m3, Klorvess Liquid concentration is
3-5%, insulating liquid injection rate is 2-3m3.
In described step f, time t4 is 1 minute.
Described insulating liquid is sodium carboxymethyl cellulose or polyanion cellulose.
The size of described sleeve pipe is 5.5 inches.
The size of described open hole packer is 8.5 inches.
Beneficial effects of the present invention are mainly manifested in following aspect:
First, the present invention, a, an exploitation external diameter are that the drill bit of 346mm completes, and then enter down the sleeve pipe that external diameter is 273mm,
Complete to cement the well；B, using external diameter, the drill bit for 222mm completes two drillings opening straight well section, then pulls out of hole；Using external diameter it is again
The drill bit of 215.9mm completes two and opens the drilling that lower curved section and two opens horizontal segment；After two end brill, drifting；After c, drifting, under enter two
The solid completion integral tubular column unit of boiled water horizontal well；D, flushing ground well cementation pipeline, injected clear water and cement mortar neck slurry, interval time
After t 1, reinject cement mortar tail-rotor；After e, interval time t2, then it is implanted sequentially 4-5m3Clear water, inject 2-3m3Insulating liquid,
2-3m3Clear water；After f, interval time t3, injection Klorvess Liquid replaces mud, then re-injects insulating liquid, interval time
After t4, throw one, the setting ball of a diameter of 41.3mm；G, reinject 50-60m3Klorvess Liquid, observe pump pressure change, pump pressure
Suddenly raise, judge that setting ball puts in place, now cement mortar bottom has reached more than the initiating terminal of horizontal segment；Continue injection potassium chloride
Solution 45-55m3, make injection pressure reach 38-42mpa, the whole one-shot of all open hole packers, realize sealing；H, Hou Ning
48 hours, complete two and open horizontal well drilling.The two boiled water horizontal wells being completed by above-mentioned steps, horizontal segment the longest up to 1083 meters；
Two opened Predicting of Drilling Time In Horizontal Wells for 37.6 days, and the existing three boiled water horizontal wells of ratio reduce 15 days in average 53 days, and wellbore construction expense reduces
More than 1000000 yuan；Two boiled water horizontal well Well Development costs decline 25%；Contrast three opening structures, individual well can save 30 tons of sleeve pipe, section
About more than 200,000 yuan of sleeve pipe expense；Complete 9.15 ms/h of well average rate of penetration, 7.9 ms/h of prior art of ratio, improves
15.8%；Effectively increase rate of penetration, when reservoir inclination angle, reservoir properties occur large change, line amplitude can be entered larger
Track adjustment, motility is strong, and cementing operation difficulty is low, and cementing quality is good.
2nd, the present invention, using the solid completion integral tubular column unit of two boiled water horizontal wells, including float collar and self-styled ball seat, bore hole
Packer at least three, is provided with a pitching sliding sleeve between the adjacent open hole packer of any two, tubing string from top to bottom according to
Secondary by float shoe, float collar, self-styled ball seat, pressure reduction sliding sleeve, open hole packer and pitching sliding sleeve described in screwed connection, wherein, float shoe
Play guiding function；During lower tubular column, the drilling fluid outside pipe is unable in sleeve pipe float collar, is in normal sealing state, but pipe
When the drilling well liquid columnpressure of interior perfusion is higher than toric space head of liquid, in pipe, drilling fluid then can enter ring-like sky by float collar
Between；Self-styled ball seat, had both had single current valve action, simultaneously stacker blocking, assists to realize open hole packer sealing and assists to realize
Pressure reduction sliding sleeve is opened；Pressure reduction sliding sleeve, when in tubing string, pressure is higher than pipe external pressure setting value, pressure reduction sliding sleeve is opened, reservoir reconstruction
When, fracturing fluid just can enter stratum by this passage；Pitching sliding sleeve, forms window, storage for reservoir segmentation is opened with tubing string
During layer transformation, fracturing fluid enters stratum by this window；Open hole packer, for insulating the upper and lower toric space of jacket exterior, will
Horizontal fragmentation separates, and when realizing this section of reservoir fracturing improvement, pressure can not be delivered in other sections, and other horizontal segments are not subject to up and down
Impact；Sleeve pipe, for insulating the open hole bore getting out, forms oil gas flow channel；It is straight after tubing string is lowered into predetermined well depth
Connect cementing well, after cement slurry sets, directly carry out reservoir reconstruction, greatly improve safety；Tubular column unit is total to be taken
And have dropped 40%, pressing crack construction discharge capacity, is greatly shortened it is achieved that transforming to the depth of reservoir up to 10 cubic meters per minute
The reservoir reconstruction engineering time；Correctional effect lifting more than 20%；Transformation reservoir construction pressure break liquid measure is greatly reduced, saves reservoir
Rebuilding construction expense more than 10%；Effectively raise bit speed, shorten brill completion period, reduce development cost, carry
High recovery ratio.
3rd, the present invention, the external diameter of the pitching sliding sleeve setting gradually from top to bottom along tubing string is identical, and internal diameter is gradually increased, when
Setting ball puts in tubing string from well head, drops to when receiving, the external diameter because of setting ball is more than an internal diameter of receiving, and realizes sealing,
When pressure is raised to certain value, that is, when pipe external and internal pressure difference reaches design load, shear pin is cut off, setting ball and receive seat
Descending, window is opened, and realizes the inside and outside connection of pipe；By increasing the internal diameter of pitching sliding sleeve from top to bottom successively along tubing string, can either
Realize good sealing it is also possible to ensure pipe inside and outside connection smoothness.
4th, the present invention, self-styled ball seat includes the ball-and-seat linking together and seat of receiving, and seat of receiving is located at the upper of ball-and-seat
Side, after setting ball receives seat from well head input whereabouts arrival, is capable of good sealing in pipe；Inject liquid in pipe,
Overpressure raises, and when being increased to open hole packer unpacking pressure, open hole packer starts sealing, continues injection liquid, pressure
Power also continues to raise, and when reaching pressure reduction sliding sleeve Opening pressure, pressure reduction sliding sleeve is opened, using this ad hoc structure from blocking
Seat, had both had single current valve action, simultaneously can stacker blocking, can effectively assist to realize open hole packer sealing and assist real
Existing pressure reduction sliding sleeve is opened.
5th, the present invention, opens after well cementation compared with by the way of coiled tubing carries underseal instrument pressure break with two, individual well saving tries
8.5 days gas cycles, more than 100,000 yuan of individual well saving gas testing cost.
6th, the present invention, contrasts coiled tubing band underseal instrument pressure break, in the case of sand feeding amount is consistent, average individual well can subtract
Few fracturing fluid consumption 340m3, save 170,000 yuan of fracturing fluid expense.
7th, the present invention, contrasts coiled tubing band underseal instrument pressure break mode, under segments the same terms, average individual well
Instrument, acid solution, more than 1,000,000 yuan of crane cost can be saved.
8th, the present invention, greatly improves reservoir reconstruction effect, and pressing crack construction discharge capacity can reach 10 cubic meters per minute, more existing
It is achieved that transforming to the depth of reservoir for having technology 4.8 cubic meters per minute, correctional effect lifting more than 20%.
9th, the present invention, single footage per bit is up to 516 meters, 6.04 ms/h of rate of penetration, is the quick of horizontal segment
Drilling, the full well drilling period of shortening provide guarantee, have saved drill bit direct cost, have also saved individual well drilling cost simultaneously,
Achieve well cementation, completion tool one-trip string it is achieved that tubing string big orifice is it is achieved that well cementation is made with setting open hole packer connection,
Achieve horizontal segment bore hole, top well cementation packing, be truly realized speed-raising and put forward effect.
Tenth, the present invention, the size of sleeve pipe is 5.5 inches, increases internal diameter, facilitates implementation the depth transformation of reservoir, works as storage
Layer transformation when, if occur sand plug, can effective process, reduce intractability and cost.
11, the present invention, the size of open hole packer is 8.5 inches, when inside and outside differential pressure reaches design load, shear pin
Cut off, external diameter increases 10%-30%, be capable of good sealing, sealing stability is strong；All open hole packer size uniformity
Sample, when pressure reaches unpacking pressure during work, all open hole packers that a bite down-hole enters all are broken seal simultaneously, act in agreement.
Brief description
Below in conjunction with specification drawings and specific embodiments, the present invention is described in further detail, wherein:
Fig. 1 is the structural representation of the solid completion integral tubular column unit of the present invention two boiled water horizontal well；
Fig. 2 is the structural representation of the self-styled ball seat of the present invention；
In figure labelling: 1, sleeve pipe, 2, tubing string, 3, vertical section, 4, tilting section, 5, horizontal segment, 6, pitching sliding sleeve, 7, pressure reduction slides
Set, 8, open hole packer, 9, float shoe, 10, float collar, 11, self-styled ball seat, 12, ball-and-seat, 13, seat of receiving.
Specific embodiment
Embodiment 1
A kind of two boiled water horizontal well boring methods, comprise the following steps:
A, an exploitation external diameter are that the drill bit of 346mm completes, and then enter down the sleeve pipe 1 that external diameter is 273mm, complete to cement the well；
B, using external diameter, the drill bit for 222mm completes two drillings opening straight well section, then pulls out of hole；Using external diameter it is again
The drill bit of 215.9mm completes two and opens the drilling that lower curved section and two opens horizontal segment；After two end brill, drifting；
After c, drifting, under enter the solid completion integral tubular column unit of two boiled water horizontal wells；
D, rinse ground well cementation pipeline, injected clear water and cement mortar neck slurry, after interval time t 1, reinject cement mortar tail
Oar；
After e, interval time t2, then it is implanted sequentially 4m3Clear water, inject 2m3Insulating liquid, 2m3Clear water；
After f, interval time t3, injection Klorvess Liquid replaces mud, then re-injects insulating liquid, interval time t4
Afterwards, throw one, the setting ball of a diameter of 41.3mm；
G, reinject 50m3Klorvess Liquid, observe pump pressure change, pump pressure raises suddenly, judges that setting ball puts in place, this
When cement mortar bottom reached more than the initiating terminal of horizontal segment；Continue injection Klorvess Liquid 45m3, so that injection pressure is reached
38mpa, the whole one-shot of all open hole packers 8, realize sealing；
Solidifying 48 hours of h, time, complete two and open horizontal well drilling.
A, an exploitation external diameter are that the drill bit of 346mm completes, and then enter down the sleeve pipe that external diameter is 273mm, complete to cement the well；b、
Two drillings opening straight well section are completed using the drill bit for 222mm for the external diameter, then pulls out of hole；Adopt the drill bit that external diameter is 215.9mm again
Complete two and open the drilling that lower curved section and two opens horizontal segment；After two end brill, drifting；After c, drifting, under enter two boiled water horizontal wells and consolidated
Well integrated pipe column device；D, rinse ground well cementation pipeline, injected clear water and cement mortar neck slurry, after interval time t 1, reinject
Cement mortar tail-rotor；After e, interval time t2, then it is implanted sequentially 4m3Clear water, inject 2m3Insulating liquid, 2m3Clear water；F, interval
After time t3, injection Klorvess Liquid replaces mud, then re-injects insulating liquid, after interval time t4, throws a diameter of
One, the setting ball of 41.3mm；G, reinject 50m3Klorvess Liquid, observe pump pressure change, pump pressure raises suddenly, judges seat
Blocking puts in place, and now cement mortar bottom has reached more than the initiating terminal of horizontal segment；Continue injection Klorvess Liquid 45m3, make injection
Pressure reaches 38mpa, the whole one-shot of all open hole packers, realizes sealing；Solidifying 48 hours of h, time, complete two boiled water horizontal wells
Drilling well.The two boiled water horizontal wells being completed by above-mentioned steps, horizontal segment the longest up to 1083 meters；Two open Predicting of Drilling Time In Horizontal Wells is
37.6 days, than existing three boiled water horizontal wells, average 53 days reduced 15 days, and wellbore construction expense reduces more than 1,000,000 yuan；Two boiled water are put down
Well Well Development cost declines 25%；Contrast three opening structures, individual well can save 30 tons of sleeve pipe, save 200,000 yuan of sleeve pipe expense with
On；Complete 9.15 ms/h of well average rate of penetration, 7.9 ms/h of prior art of ratio, improve 15.8%；Effectively increase
Rate of penetration, when reservoir inclination angle, reservoir properties occur large change, can enter the larger track adjustment of line amplitude, motility is strong,
Cementing operation difficulty is low, and cementing quality is good.
Embodiment 2
A kind of two boiled water horizontal well boring methods, comprise the following steps:
A, an exploitation external diameter are that the drill bit of 346mm completes, and then enter down the sleeve pipe 1 that external diameter is 273mm, complete to cement the well；
B, using external diameter, the drill bit for 222mm completes two drillings opening straight well section, then pulls out of hole；Using external diameter it is again
The drill bit of 215.9mm completes two and opens the drilling that lower curved section and two opens horizontal segment；After two end brill, drifting；
After c, drifting, under enter the solid completion integral tubular column unit of two boiled water horizontal wells；
D, rinse ground well cementation pipeline, injected clear water and cement mortar neck slurry, after interval time t 1, reinject cement mortar tail
Oar；
After e, interval time t2, then it is implanted sequentially 4.5m3Clear water, inject 2.5m3Insulating liquid, 2.5m3Clear water；
After f, interval time t3, injection Klorvess Liquid replaces mud, then re-injects insulating liquid, interval time t4
Afterwards, throw one, the setting ball of a diameter of 41.3mm；
G, reinject 55m3Klorvess Liquid, observe pump pressure change, pump pressure raises suddenly, judges that setting ball puts in place, this
When cement mortar bottom reached more than the initiating terminal of horizontal segment；Continue injection Klorvess Liquid 50m3, so that injection pressure is reached
40mpa, the whole one-shot of all open hole packers 8, realize sealing；
Solidifying 48 hours of h, time, complete two and open horizontal well drilling.
Described two boiled water horizontal wells completion integral tubular column unit admittedly, the tubing string 2 including sleeve pipe 1, being located in sleeve pipe 1, tubing string 2
The pitching sliding sleeve 6 that be made up of vertical section 3, tilting section 4 and horizontal segment 5 from top to bottom, is arranged on horizontal segment 5, pressure reduction sliding sleeve 7,
Open hole packer 8 and float shoe 9, also include float collar 10 and self-styled ball seat 11, described open hole packer 8 at least three, and any two
It is provided with a pitching sliding sleeve 6, described tubing string 2 passes sequentially through screwed connection institute from top to bottom between individual adjacent open hole packer 8
State float shoe 9, float collar 10, self-styled ball seat 11, pressure reduction sliding sleeve 7, open hole packer 8 and pitching sliding sleeve 6.
Using the solid completion integral tubular column unit of two boiled water horizontal wells, including float collar and self-styled ball seat, open hole packer is at least
For three, between the adjacent open hole packer of any two, it is provided with a pitching sliding sleeve, tubing string passes sequentially through screw thread from top to bottom
Connect described float shoe, float collar, self-styled ball seat, pressure reduction sliding sleeve, open hole packer and pitching sliding sleeve, wherein, float shoe plays guiding function；
During lower tubular column, the drilling fluid outside pipe is unable in sleeve pipe float collar, is in normal sealing state, but the drilling well irrigating in pipe
When liquid head of liquid is higher than toric space head of liquid, in pipe, drilling fluid then can enter toric space by float collar；Self-styled ball seat,
Both there is single current valve action, simultaneously stacker blocking, and assisted to realize open hole packer sealing and assistance is realized pressure reduction sliding sleeve and opened；
Pressure reduction sliding sleeve, when in tubing string, pressure is higher than pipe external pressure setting value, pressure reduction sliding sleeve is opened, and during reservoir reconstruction, fracturing fluid is with regard to energy
Enough stratum is entered by this passage；Pitching sliding sleeve, forms window, during reservoir reconstruction, pressure break for reservoir segmentation is opened with tubing string
Liquid enters stratum by this window；Open hole packer, for insulating the upper and lower toric space of jacket exterior, horizontal fragmentation is separated,
When realizing this section of reservoir fracturing improvement, pressure can not be delivered in other sections, and other horizontal segments are unaffected up and down；Sleeve pipe, uses
In insulating the open hole bore getting out, form oil gas flow channel；Direct cementing well after tubing string is lowered into predetermined well depth,
After cement slurry sets, directly carry out reservoir reconstruction, greatly improve safety；Tubular column unit total cost have dropped 40%,
Pressing crack construction discharge capacity up to 10 cubic meters per minute it is achieved that to the transformation of the depth of reservoir, when reservoir reconstruction construction is greatly shortened
Between；Correctional effect lifting more than 20%；Transformation reservoir construction pressure break liquid measure is greatly reduced, saves reservoir reconstruction operating expenses
More than 10%；Effectively raise bit speed, shorten brill completion period, reduce development cost, improve recovery ratio.
Embodiment 3
A kind of two boiled water horizontal well boring methods, comprise the following steps:
A, an exploitation external diameter are that the drill bit of 346mm completes, and then enter down the sleeve pipe 1 that external diameter is 273mm, complete to cement the well；
B, using external diameter, the drill bit for 222mm completes two drillings opening straight well section, then pulls out of hole；Using external diameter it is again
The drill bit of 215.9mm completes two and opens the drilling that lower curved section and two opens horizontal segment；After two end brill, drifting；
After c, drifting, under enter the solid completion integral tubular column unit of two boiled water horizontal wells；
D, rinse ground well cementation pipeline, injected clear water and cement mortar neck slurry, after interval time t 1, reinject cement mortar tail
Oar；
After e, interval time t2, then it is implanted sequentially 5m3Clear water, inject 3m3Insulating liquid, 3m3Clear water；
After f, interval time t3, injection Klorvess Liquid replaces mud, then re-injects insulating liquid, interval time t4
Afterwards, throw one, the setting ball of a diameter of 41.3mm；
G, reinject 60m3Klorvess Liquid, observe pump pressure change, pump pressure raises suddenly, judges that setting ball puts in place, this
When cement mortar bottom reached more than the initiating terminal of horizontal segment；Continue injection Klorvess Liquid 55m3, so that injection pressure is reached
42mpa, the whole one-shot of all open hole packers 8, realize sealing；
Solidifying 48 hours of h, time, complete two and open horizontal well drilling.
Described two boiled water horizontal wells completion integral tubular column unit admittedly, the tubing string 2 including sleeve pipe 1, being located in sleeve pipe 1, tubing string 2
The pitching sliding sleeve 6 that be made up of vertical section 3, tilting section 4 and horizontal segment 5 from top to bottom, is arranged on horizontal segment 5, pressure reduction sliding sleeve 7,
Open hole packer 8 and float shoe 9, also include float collar 10 and self-styled ball seat 11, described open hole packer 8 at least three, and any two
It is provided with a pitching sliding sleeve 6, described tubing string 2 passes sequentially through screwed connection institute from top to bottom between individual adjacent open hole packer 8
State float shoe 9, float collar 10, self-styled ball seat 11, pressure reduction sliding sleeve 7, open hole packer 8 and pitching sliding sleeve 6.
The external diameter of the pitching sliding sleeve 6 setting gradually from top to bottom along tubing string 2 is identical, and internal diameter is gradually increased.
Described self-styled ball seat 11 includes the ball-and-seat 12 linking together and seat 13 of receiving, and seat 13 of receiving is located at ball-and-seat 12
Top.
The external diameter of the pitching sliding sleeve setting gradually from top to bottom along tubing string is identical, and internal diameter is gradually increased, when setting ball is from well
Mouthful put in tubing string, drop to when receiving, the external diameter because of setting ball is more than an internal diameter of receiving, and realizes sealing, when pressure is raised to
During certain value, that is, when pipe external and internal pressure difference reaches design load, shear pin is cut off, and setting ball and seat of receiving are descending, window
Open, realize the inside and outside connection of pipe；By increasing the internal diameter of pitching sliding sleeve from top to bottom successively along tubing string, can either realize good
Sealing is it is also possible to ensure pipe inside and outside connection smoothness.
Self-styled ball seat includes the ball-and-seat linking together and seat of receiving, and seat of receiving is located at the top of ball-and-seat, when setting
Ball is received from well head input whereabouts arrival after seat, is capable of good sealing in pipe；Liquid, overpressure liter is injected in pipe
Height, when being increased to open hole packer unpacking pressure, open hole packer starts sealing, continues injection liquid, and pressure also continues to rise
Height, when reaching pressure reduction sliding sleeve Opening pressure, pressure reduction sliding sleeve is opened, and using the self-styled ball seat of this ad hoc structure, has both had list
Stream valve action, simultaneously can stacker blocking, can effectively assist to realize open hole packer sealing and pressure reduction sliding sleeve is realized in assistance
Open.
Embodiment 4
A kind of two boiled water horizontal well boring methods, comprise the following steps:
A, an exploitation external diameter are that the drill bit of 346mm completes, and then enter down the sleeve pipe 1 that external diameter is 273mm, complete to cement the well；
B, using external diameter, the drill bit for 222mm completes two drillings opening straight well section, then pulls out of hole；Using external diameter it is again
The drill bit of 215.9mm completes two and opens the drilling that lower curved section and two opens horizontal segment；After two end brill, drifting；
After c, drifting, under enter the solid completion integral tubular column unit of two boiled water horizontal wells；
D, rinse ground well cementation pipeline, injected clear water and cement mortar neck slurry, after interval time t 1, reinject cement mortar tail
Oar；
After e, interval time t2, then it is implanted sequentially 5m3Clear water, inject 3m3Insulating liquid, 3m3Clear water；
After f, interval time t3, injection Klorvess Liquid replaces mud, then re-injects insulating liquid, interval time t4
Afterwards, throw one, the setting ball of a diameter of 41.3mm；
G, reinject 60m3Klorvess Liquid, observe pump pressure change, pump pressure raises suddenly, judges that setting ball puts in place, this
When cement mortar bottom reached more than the initiating terminal of horizontal segment；Continue injection Klorvess Liquid 55m3, so that injection pressure is reached
42mpa, the whole one-shot of all open hole packers 8, realize sealing；
Solidifying 48 hours of h, time, complete two and open horizontal well drilling.
Described two boiled water horizontal wells completion integral tubular column unit admittedly, the tubing string 2 including sleeve pipe 1, being located in sleeve pipe 1, tubing string 2
The pitching sliding sleeve 6 that be made up of vertical section 3, tilting section 4 and horizontal segment 5 from top to bottom, is arranged on horizontal segment 5, pressure reduction sliding sleeve 7,
Open hole packer 8 and float shoe 9, also include float collar 10 and self-styled ball seat 11, described open hole packer 8 at least three, and any two
It is provided with a pitching sliding sleeve 6, described tubing string 2 passes sequentially through screwed connection institute from top to bottom between individual adjacent open hole packer 8
State float shoe 9, float collar 10, self-styled ball seat 11, pressure reduction sliding sleeve 7, open hole packer 8 and pitching sliding sleeve 6.
The external diameter of the pitching sliding sleeve 6 setting gradually from top to bottom along tubing string 2 is identical, and internal diameter is gradually increased.
Described self-styled ball seat 11 includes the ball-and-seat 12 linking together and seat 13 of receiving, and seat 13 of receiving is located at ball-and-seat 12
Top.
In described step d, clear water is 4m3, the density of cement mortar neck slurry is 1.4kg/m3.
In described step d, time t 1 is 1 minute, and the injection rate of cement mortar tail-rotor is 17m3, the density of cement mortar tail-rotor
For 1.85kg/m3.
In described step e, time t2 is 1 minute.
In described step f, time t3 is 1 minute, and Klorvess Liquid injection rate is 25m3, Klorvess Liquid concentration is 3%,
Insulating liquid injection rate is 2m3.
In described step f, time t4 is 1 minute.
Described insulating liquid is sodium carboxymethyl cellulose.
The size of described sleeve pipe 1 is 5.5 inches.
The size of described open hole packer 8 is 8.5 inches.
Open after well cementation compared with by the way of coiled tubing carries underseal instrument pressure break with two, individual well saves the gas testing cycle 8.5
My god, more than 100,000 yuan of individual well saving gas testing cost.Contrast coiled tubing band underseal instrument pressure break, in the case of sand feeding amount is consistent,
Average individual well can reduce fracturing fluid consumption 340m3, save 170,000 yuan of fracturing fluid expense.
Embodiment 5
A kind of two boiled water horizontal well boring methods, comprise the following steps:
A, an exploitation external diameter are that the drill bit of 346mm completes, and then enter down the sleeve pipe 1 that external diameter is 273mm, complete to cement the well；
B, using external diameter, the drill bit for 222mm completes two drillings opening straight well section, then pulls out of hole；Using external diameter it is again
The drill bit of 215.9mm completes two and opens the drilling that lower curved section and two opens horizontal segment；After two end brill, drifting；
After c, drifting, under enter the solid completion integral tubular column unit of two boiled water horizontal wells；
D, rinse ground well cementation pipeline, injected clear water and cement mortar neck slurry, after interval time t 1, reinject cement mortar tail
Oar；
After e, interval time t2, then it is implanted sequentially 5m3Clear water, inject 3m3Insulating liquid, 3m3Clear water；
After f, interval time t3, injection Klorvess Liquid replaces mud, then re-injects insulating liquid, interval time t4
Afterwards, throw one, the setting ball of a diameter of 41.3mm；
G, reinject 60m3Klorvess Liquid, observe pump pressure change, pump pressure raises suddenly, judges that setting ball puts in place, this
When cement mortar bottom reached more than the initiating terminal of horizontal segment；Continue injection Klorvess Liquid 55m3, so that injection pressure is reached
42mpa, the whole one-shot of all open hole packers 8, realize sealing；
Solidifying 48 hours of h, time, complete two and open horizontal well drilling.
Described two boiled water horizontal wells completion integral tubular column unit admittedly, the tubing string 2 including sleeve pipe 1, being located in sleeve pipe 1, tubing string 2
The pitching sliding sleeve 6 that be made up of vertical section 3, tilting section 4 and horizontal segment 5 from top to bottom, is arranged on horizontal segment 5, pressure reduction sliding sleeve 7,
Open hole packer 8 and float shoe 9, also include float collar 10 and self-styled ball seat 11, described open hole packer 8 at least three, and any two
It is provided with a pitching sliding sleeve 6, described tubing string 2 passes sequentially through screwed connection institute from top to bottom between individual adjacent open hole packer 8
State float shoe 9, float collar 10, self-styled ball seat 11, pressure reduction sliding sleeve 7, open hole packer 8 and pitching sliding sleeve 6.
The external diameter of the pitching sliding sleeve 6 setting gradually from top to bottom along tubing string 2 is identical, and internal diameter is gradually increased.
Described self-styled ball seat 11 includes the ball-and-seat 12 linking together and seat 13 of receiving, and seat 13 of receiving is located at ball-and-seat 12
Top.
In described step d, clear water is 4.5m3, the density of cement mortar neck slurry is 1.45kg/m3.
In described step d, time t 1 is 1 minute, and the injection rate of cement mortar tail-rotor is 20m3, the density of cement mortar tail-rotor
For 1.9kg/m3.
In described step e, time t2 is 1 minute.
In described step f, time t3 is 1 minute, and Klorvess Liquid injection rate is 28m3, Klorvess Liquid concentration is 4%,
Insulating liquid injection rate is 2.5m3.
In described step f, time t4 is 1 minute.
Described insulating liquid is sodium carboxymethyl cellulose.
The size of described sleeve pipe 1 is 5.5 inches.
The size of described open hole packer 8 is 8.5 inches.
Contrast coiled tubing band underseal instrument pressure break mode, under segments the same terms, average individual well can save instrument,
More than 1,000,000 yuan of acid solution, crane cost.Greatly improve reservoir reconstruction effect, pressing crack construction discharge capacity can reach 10 cubes ms/min
It is achieved that transforming to the depth of reservoir for clock, relatively prior art 4.8 cubic meters per minute, correctional effect lifting more than 20%.
Embodiment 6
A kind of two boiled water horizontal well boring methods, comprise the following steps:
A, an exploitation external diameter are that the drill bit of 346mm completes, and then enter down the sleeve pipe 1 that external diameter is 273mm, complete to cement the well；
B, using external diameter, the drill bit for 222mm completes two drillings opening straight well section, then pulls out of hole；Using external diameter it is again
The drill bit of 215.9mm completes two and opens the drilling that lower curved section and two opens horizontal segment；After two end brill, drifting；
After c, drifting, under enter the solid completion integral tubular column unit of two boiled water horizontal wells；
D, rinse ground well cementation pipeline, injected clear water and cement mortar neck slurry, after interval time t 1, reinject cement mortar tail
Oar；
After e, interval time t2, then it is implanted sequentially 5m3Clear water, inject 3m3Insulating liquid, 3m3Clear water；
After f, interval time t3, injection Klorvess Liquid replaces mud, then re-injects insulating liquid, interval time t4
Afterwards, throw one, the setting ball of a diameter of 41.3mm；
G, reinject 60m3Klorvess Liquid, observe pump pressure change, pump pressure raises suddenly, judges that setting ball puts in place, this
When cement mortar bottom reached more than the initiating terminal of horizontal segment；Continue injection Klorvess Liquid 55m3, so that injection pressure is reached
42mpa, the whole one-shot of all open hole packers 8, realize sealing；
Solidifying 48 hours of h, time, complete two and open horizontal well drilling.
Described two boiled water horizontal wells completion integral tubular column unit admittedly, the tubing string 2 including sleeve pipe 1, being located in sleeve pipe 1, tubing string 2
The pitching sliding sleeve 6 that be made up of vertical section 3, tilting section 4 and horizontal segment 5 from top to bottom, is arranged on horizontal segment 5, pressure reduction sliding sleeve 7,
Open hole packer 8 and float shoe 9, also include float collar 10 and self-styled ball seat 11, described open hole packer 8 at least three, and any two
It is provided with a pitching sliding sleeve 6, described tubing string 2 passes sequentially through screwed connection institute from top to bottom between individual adjacent open hole packer 8
State float shoe 9, float collar 10, self-styled ball seat 11, pressure reduction sliding sleeve 7, open hole packer 8 and pitching sliding sleeve 6.
The external diameter of the pitching sliding sleeve 6 setting gradually from top to bottom along tubing string 2 is identical, and internal diameter is gradually increased.
Described self-styled ball seat 11 includes the ball-and-seat 12 linking together and seat 13 of receiving, and seat 13 of receiving is located at ball-and-seat 12
Top.
In described step d, clear water is 5m3, the density of cement mortar neck slurry is 1.5kg/m3.
In described step d, time t 1 is 1 minute, and the injection rate of cement mortar tail-rotor is 25m3, the density of cement mortar tail-rotor
For 1.92kg/m3.
In described step e, time t2 is 1 minute.
In described step f, time t3 is 1 minute, and Klorvess Liquid injection rate is 30m3, Klorvess Liquid concentration is 5%,
Insulating liquid injection rate is 3m3.
In described step f, time t4 is 1 minute.
Described insulating liquid is polyanion cellulose.
The size of described sleeve pipe 1 is 5.5 inches.
The size of described open hole packer 8 is 8.5 inches.
Single footage per bit is up to 516 meters, 6.04 ms/h of rate of penetration, is the fast drilling of horizontal segment, shortens entirely
Well drilling period provides guarantee, has saved drill bit direct cost, also save individual well drilling cost simultaneously it is achieved that well cementation,
Completion tool one-trip string is it is achieved that tubing string big orifice is it is achieved that well cementation makees with setting open hole packer connection it is achieved that horizontal segment
Bore hole, top well cementation packing, are truly realized speed-raising and put forward effect.The size of sleeve pipe is 5.5 inches, increases internal diameter, facilitates implementation
Reservoir depth transformation, when reservoir reconstruction, if occur sand plug, can effective process, reduce intractability and cost.Bore hole
The size of packer is 8.5 inches, and when inside and outside differential pressure reaches design load, shear pin is cut off, and external diameter increases 10%-30%,
It is capable of good sealing, sealing stability is strong；All open hole packer size uniformity samples, when pressure reaches unpacking during work
Pressure, all open hole packers that a bite down-hole enters all are broken seal simultaneously, act in agreement.
The operation principle of the self-styled ball seat of the present invention is: the internal diameter of seat of receiving is less than the external diameter of setting ball, when setting ball is from well
Mouth input whereabouts arrival is received after seat, realizes sealing in pipe.Injection liquid in pipe, overpressure rising, when being increased to bore hole
During packer unpacking pressure, open hole packer starts sealing, continues injection liquid, and pressure also continues to raise, and slides when reaching pressure reduction
During set Opening pressure, pressure reduction sliding sleeve is opened.
The operation principle of pressure reduction sliding sleeve of the present invention is: after putting into setting ball, setting ball reaches seat of receiving, and injects in pipe
Liquid, pressure rise, when reaching certain pressure value, shear pin is cut off, and pressure reduction sliding sleeve is opened, with pressure reduction sliding sleeve in tubing string pipe
Pipe outer toric space connection, is connected with one section of reservoir of shaft bottom foot.
The operation principle of pitching sliding sleeve of the present invention is: when setting ball puts in tubing string from well head, drops to when receiving, because
The external diameter of setting ball is more than an internal diameter of receiving, and realizes sealing, when pressure is raised to certain value, that is, pipe external and internal pressure difference reaches
During design load, shear pin is cut off, setting ball and receive that seat is descending, and window is opened, and realizes the inside and outside connection of pipe.
The operation principle of open hole packer of the present invention is: when inside and outside differential pressure reaches design load, shear pin is cut off, fluid cylinder
Promotion promotes packing element to be subject to longitudinal extruding, and external diameter increases 10%-30%, realizes sealing；All open hole packer size uniformity samples, work
When pressure reaches unpacking pressure when making, all open hole packers that a bite down-hole enters all are broken seal simultaneously.
This method is applied to the domestic Soviet Union's Sulige gas field in Ordos of Inner Mongolia, referring to table 1.
Table 1 is: using two boiled water horizontal well boring methods, Soviet Union's Sulige gas field is constructed；
Table 1
As can be seen from Table 1: complete within 2013 3 mouthfuls of wells, complete within 2014 5 mouthfuls of wells, horizontal section length all more than 600 meters,
For up to 1400 meters.
Su Lige bis- opened horizontal well drilling completion cycle time within 39 days, and full well rate of penetration improves more than 5%；2014
Years two open the horizontal well drilling completion cycle 37.6 days, 9.15 ms/h of full well average rate of penetration, 7.9 ms/h of 2013 of ratio
Improve 15.8%, two boiled water horizontal well individual well costs decline more than 15%；If two boiled water horizontal well horizontal segments press 600 meters of calculating, individual well
Development cost declines 25%.
Open horizontal drilling using two, compared with for three spudding wells, after completion, horizontal segment is bore hole, and before fracturing reform, reservoir is not subject to
Cement mortar pollutes；More than horizontal segment cement the well reliable；Completion tubular column internal diameter is big, can really realize extensive volume fracturing transformation；Water
After flat section is engineered, reservoir all can effectively be employed；Sand blast sliding sleeve is easy brill sliding sleeve, and boring after opening is sleeve pipe full-bore, after being
The reentry construction technology such as continuous well workover, water blockoff creates good condition；Drilling well, well cementation, completion, gas testing, the linking of operation overall process are tight
Close, construction period significantly shortens, and substantially, reservoir reconstruction effect is significant is lifted the development cost range of decrease.
The direct economic benefit obtaining:
1st, drilling period significantly shortens, 5-14-26h well drilling period of reviving: 26.92 days, creates Soviet Union's Sulige gas field two and opens
Horizontal well records the soonest.Open within 2014 two Predicting of Drilling Time In Horizontal Wells average 37.625 days, average than three boiled water horizontal wells 53 days reduce
15 days, wellbore construction expense reduced more than 1,000,000 yuan.
2 and two open and adopt coiled tubing band underseal instrument pressure break after well cementation, and individual well saves 8.5 days gas testing cycles, gas testing list
Cost-effective more than 100,000 yuan of the individual well in position.
3rd, contrast coiled tubing band underseal instrument pressure break, in the case of sand feeding amount is consistent, average individual well can reduce fracturing fluid
Consumption 340 side, saves 170,000 yuan of fracturing fluid expense.
4th, contrast coiled tubing band underseal instrument pressure break, under segments the same terms, average individual well can save instrument, acid
More than 1,000,000 yuan of liquid, crane cost.
5th, three opening structures are contrasted, individual well can save 30 tons of sleeve pipe, more than 200,000 yuan of saving sleeve pipe expense.
The indirect economic effect obtaining:
1st, reservoir reconstruction effect is significantly lifted, and well yield, quantum of output are improved；
2nd, secondary reentry well workover, water blockoff work can be carried out.
Claims (10)
1. a kind of two boiled water horizontal well boring methods are it is characterised in that comprise the following steps:
A, an exploitation external diameter are that the drill bit of 346mm completes, and then enter down the sleeve pipe (1) that external diameter is 273mm, complete to cement the well；
B, using external diameter, the drill bit for 222mm completes two drillings opening straight well section, then pulls out of hole；External diameter is adopted to be 215.9mm again
Drill bit complete two and open the drilling that lower curved section and two opens horizontal segment；After two end brill, drifting；
After c, drifting, under enter the solid completion integral tubular column unit of two boiled water horizontal wells；
D, rinse ground well cementation pipeline, injected clear water and cement mortar neck slurry, after interval time t1, reinject cement mortar tail-rotor；
After e, interval time t2, then it is implanted sequentially 4-5m3Clear water, inject 2-3m3Insulating liquid, 2-3m3Clear water；
After f, interval time t3, injection Klorvess Liquid replaces mud, then re-injects insulating liquid, after interval time t4, throws
One, the setting ball of a diameter of 41.3mm；
G, reinject 50-60m3Klorvess Liquid, observe pump pressure change, pump pressure raises suddenly, judges that setting ball puts in place, now
Cement mortar bottom has reached more than the initiating terminal of horizontal segment；Continue injection Klorvess Liquid 45-55m3, so that injection pressure is reached
38-42mpa, all open hole packers (8) all one-shots, realize sealing；
Solidifying 48 hours of h, time, complete two and open horizontal well drilling.
2. a kind of two boiled water horizontal well boring methods according to claim 1 it is characterised in that: described two boiled water horizontal wells have been consolidated
Well integrated pipe column device, the tubing string (2) including sleeve pipe (1), being located in sleeve pipe (1), tubing string (2) are from top to bottom by vertical section
(3), tilting section (4) and horizontal segment (5) composition, the pitching sliding sleeve (6) being arranged on horizontal segment (5), pressure reduction sliding sleeve (7), bore hole
Packer (8) and float shoe (9), also include float collar (10) and self-styled ball seat (11), described open hole packer (8) at least three,
It is provided with a pitching sliding sleeve (6), described tubing string (2) is led to from top to bottom successively between the adjacent open hole packer of any two (8)
Cross float shoe described in screwed connection (9), float collar (10), self-styled ball seat (11), pressure reduction sliding sleeve (7), open hole packer (8) and pitching to slide
Set (6).
3. a kind of two boiled water horizontal well boring methods according to claim 2 it is characterised in that: along tubing string (2) from top to bottom
The external diameter of the pitching sliding sleeve (6) setting gradually is identical, and internal diameter is gradually increased.
4. a kind of two boiled water horizontal well boring methods according to claim 2 it is characterised in that: described self-styled ball seat (11) bag
Include the ball-and-seat (12) linking together and seat of receiving (13), seat of receiving (13) is located at the top of ball-and-seat (12).
5. a kind of two boiled water horizontal well boring methods according to claim 1 it is characterised in that: in described step d, clear water is
4-5m3, the density of cement mortar neck slurry is 1.4-1.5kg/m3.
6. a kind of two boiled water horizontal well boring methods according to claim 1 it is characterised in that: in described step d, time t1
For 1 minute, the injection rate of cement mortar tail-rotor was 17-25m3, the density of cement mortar tail-rotor is 1.85-1.92kg/m3.
7. a kind of two boiled water horizontal well boring methods according to claim 1 it is characterised in that: in described step e, time t2
For 1 minute.
8. a kind of two boiled water horizontal well boring methods according to claim 1 it is characterised in that: in described step f, time t3
For 1 minute, Klorvess Liquid injection rate was 25-30m3, Klorvess Liquid concentration is 3-5%, and insulating liquid injection rate is 2-3m3.
9. a kind of two boiled water horizontal well boring methods according to claim 1 it is characterised in that: in described step f, time t4
For 1 minute.
10. a kind of two boiled water horizontal well boring methods according to claim 1 it is characterised in that: described insulating liquid be carboxylic first
Base sodium cellulosate or polyanion cellulose.
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ID=57859654
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403912A (en) * | 2018-02-27 | 2019-03-01 | 中石化石油工程技术服务有限公司 | A kind of method and construction method of the water injection of horizontal well bod |
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Application publication date: 20170125 |