CN106337667A - Dual-opening horizontal well cementation and completion construction method - Google Patents

Dual-opening horizontal well cementation and completion construction method Download PDF

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Publication number
CN106337667A
CN106337667A CN201610854598.XA CN201610854598A CN106337667A CN 106337667 A CN106337667 A CN 106337667A CN 201610854598 A CN201610854598 A CN 201610854598A CN 106337667 A CN106337667 A CN 106337667A
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China
Prior art keywords
well
sliding sleeve
pressure
drilling
boiled water
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CN201610854598.XA
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Inventor
李旭春
旷正超
甘升平
李现东
姚立新
姚声贤
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CNPC Chuanqing Drilling Engineering Co Ltd
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CNPC Chuanqing Drilling Engineering Co Ltd
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Priority to CN201610854598.XA priority Critical patent/CN106337667A/en
Publication of CN106337667A publication Critical patent/CN106337667A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/12Packers; Plugs
    • E21B33/122Multiple string packers
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/13Methods or devices for cementing, for plugging holes, crevices, or the like
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B34/00Valve arrangements for boreholes or wells
    • E21B34/06Valve arrangements for boreholes or wells in wells
    • E21B34/14Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools

Abstract

The invention discloses a dual-opening horizontal well cementation and completion construction method and belongs to the technical field of drilling engineering. The second-opening horizontal well cementation and completion construction method comprises the following steps of: S1, as for a first opening, drilling to well depth of 750m by use of a 346mm drill bit; S2, as for a second opening vertical hole section, drilling to well depth of 2850m by use of a 222mm drill bit, and as for a second opening inclined hole section and a second opening horizontal section, drilling by use of a 215.9mm drill bit until a whole well is drilled; S3, performing a drafting process; S4, feeding a dual-opening horizontal well cementation and completion inteigrated pipe column device; S5, performing cement injection; S6, injecting 25m<3> cement slurry; S7, injecting 5m<3> clear water and 2m<3> sodium cellulose glycolate insulating liquid; S8, injecting 25-30m<3> potassium chloride solution for replacing the slurry, and feeding a 41.3mm seat seal ball; S9, injecting 60m<3> potassium chloride solution; and S10, performing electrical logging of well cementation quality. The method disclosed by the invention is capable of performing large-amplitude locus adjustment, is high in flexibility, low in well cementation construction difficulty and low in well cementation cost.

Description

A kind of two boiled water horizontal wells completion construction method admittedly
Technical field
The present invention relates to drilling engineering technical field, more particularly, to a kind of two boiled water horizontal wells completion construction method admittedly.
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 from spudding in to survey Visit exploitation target zone, be drilled the drilling process of full well drilling depth.Spud in, refer to down first drill bit after conduit or each layer sleeve pipe Start to creep into.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, sidewall coring, The production strings such as setting of casing, cementing are cemented the well, survey sound width, pressure testing, dress wellhead assembly etc..The operations such as completion phase well logging, test Project is many, and consumption of materials is big, and expense generation is many, and the particularly cased hole of multilamellar can make drilling cost at double or several times Raise.Completion is also down-hole complexity and Frequent Accidents stage, and the quality of particularly cementing quality is directly connected to the one-tenth of a bite well Work(and failure.
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 level of mode using three Well, wherein two exploitations are cemented the well at the initiating terminal of horizontal segment with entering under 7 inches of sleeve pipes, and three exploitations complete horizontal segment with 6 inch drill bit Drilling, completion using under enter 5 inches of casing cementings or under enter the combination of 3.5 inches of open hole packers, then reservoir is implemented after transformation Go into operation.Three spud in into mode: in existing, the complete time is long, bore completion period length, reservoir reconstruction cycle length, because completion tubular column size little Factor limit it is impossible to reservoir is implemented with the transformation of extensive spatial cuboids depth, limited by reservoir reconstruction effect, development cost Height, meanwhile, because completion tubular column size is little, cannot implement well workover, water blockoff, refracturing transformation etc. in the later stage produces to horizontal segment Technological measure, is 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, horizontal segment wellbore construction be front once After well cementation start, bit size little than lower curved section differential it is impossible to realize lower curved section and the big bradawl of horizontal segment same size Head carries out drillng operation;When reservoir inclination angle, reservoir properties occur large change when, can only be adjusted in a small range it is impossible to Flexibly enter the larger track adjustment of line amplitude.
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 wells solid completion construction method, this Invent same drill bit and can complete two and open the drilling that lower curved section and two opens horizontal segment, when reservoir inclination angle, reservoir properties occur larger During change, because annular clearance is larger, adjust so as to enter the larger track of line amplitude, motility is strong, and cementing operation difficulty is little, Well cementation low cost.
The present invention is achieved through the following technical solutions:
The solid completion construction method of one kind two boiled water horizontal wells is it is characterised in that comprise the following steps:
S1, an exploitation external diameter are the drill bit of 346mm, are drilled into 750 meters of well depth, and then entering down external diameter is the oval of 273mm Button casing cementing;
S2, two open straight well section adopt external diameter be 222mm drill bit, be drilled into 2850 meters of well depth, two open lower curved section and horizontal segment Full well finishing drilling is got to using the drill bit for 215.9mm for the external diameter;
S3, on drilling tool, order milling post and the solid completion integral tubular column unit of double milling post simulation two boiled water horizontal wells are led to Well, the well the getting out borehole wall is repaired smooth, by place expansion little for borehole diameter;
After s4, drifting are normal, act drilling tool, under enter the solid completion integral tubular column unit of two boiled water horizontal wells;
S5, flushing ground well cementation pipeline, pressure testing 45mpa is qualified;It is implanted sequentially 4m3Clear water, injection density be 1.5kg/m3 Cement mortar neck slurry;
S6, after 1 minute, inject 25m3Cement mortar, the density of described cement mortar is 1.85-1.92kg/m3
S7, after 1 minute, be implanted sequentially 5m3Clear water, inject 2m3Sodium carboxymethyl cellulose insulating liquid, reinject 3m3Clear water;
S8, after 1 minute, be implanted sequentially 25-30m3Klorvess Liquid replace mud, described Klorvess Liquid concentration For 4%;Injection 2m3Sodium carboxymethyl cellulose insulating liquid, after 1 minute elapsed time, throw a diameter of 41.3mm setting ball one Individual;
S9, continuation injection 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, all open hole packers are whole One-shot, realizes sealing;
Solidifying 48 hours of s10, time, open pressure reduction sliding sleeve, electrical measurement cementing quality.
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.
The size of described pressure reduction sliding sleeve is 8.5 inches, and length is 0.94 meter, and external diameter is 177.8 millimeters, Opening pressure and seat Seal pressure is 38mpa, 149 DEG C of heatproof, and bearing pressure reduction is 70mpa.
In described step s4, drifting is just referring to drilling tool and is above carrying do not block, and transfers non-resistance.
In described step s9, injection pressure is 40mpa.
Beneficial effects of the present invention are mainly manifested in following aspect:
First, the present invention, s1, an exploitation external diameter are the drill bit of 346mm, are drilled into 750 meters of well depth, and then entering external diameter down is The oval button casing cementing of 273mm;S2, two open straight well section adopt external diameter be 222mm drill bit, be drilled into 2850 meters of well depth, two open The drill bit for 215.9mm gets to full well finishing drilling using external diameter for lower curved section and horizontal segment;S3, on drilling tool order milling post and double milling post Simulate the solid completion integral tubular column unit of two boiled water horizontal wells and carry out drifting, the well the getting out borehole wall is repaired smooth, well is straight The little local expansion in footpath;After s4, drifting are normal, act drilling tool, under enter the solid completion integral tubular column unit of two boiled water horizontal wells;s5、 Rinse ground well cementation pipeline, pressure testing 45mpa is qualified;It is implanted sequentially 4m3Clear water, injection density be 1.5kg/m3Cement mortar neck Slurry;S6, after 1 minute, inject 25m3Cement mortar, the density of described cement mortar is 1.85-1.92kg/m3;S7, through 1 point Zhong Hou, is implanted sequentially 5m3Clear water, inject 2m3Sodium carboxymethyl cellulose insulating liquid, reinject 3m3Clear water;S8, through 1 After minute, it is implanted sequentially 25-30m3Klorvess Liquid replace mud, described Klorvess Liquid concentration be 4%;Injection 2m3Carboxylic Sodium carboxymethylcellulose pyce insulating liquid, after 1 minute elapsed time, throws one, the setting ball of a diameter of 41.3mm;S9, continuation injection 60m3 Klorvess Liquid, observe pump pressure change, pump pressure raises suddenly, judges that setting ball puts in place, now cement mortar bottom has reached water More than the initiating terminal of flat section;Continue injection Klorvess Liquid, the whole one-shot of all open hole packers, realize sealing;s10、 Wait solidifying 48 hours, open pressure reduction sliding sleeve, electrical measurement cementing quality, the two boiled water horizontal well horizontal segments being formed by above-mentioned steps are the longest can Reach 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, wellbore construction Expense reduces more than 1,000,000 yuan;Two boiled water horizontal well Well Development costs decline 25%.Contrast three opening structures, individual well can save set 30 tons of pipe, more than 200,000 yuan of saving sleeve pipe expense;When reservoir inclination angle, reservoir properties occur large change, due to annular clearance Larger, larger so as to enter line amplitude track adjustment, motility is strong, and cementing operation difficulty is little, low cost of cementing the well;Two open inclined shaft Using external diameter, the drill bit for 215.9mm gets to full well finishing drilling to section with horizontal segment, and compared with for prior art, rate of penetration improves 15% More than;And reducing by electrical measurement, setting of casing, a well cementation, average individual well drilling period shortens more than 15 days;Because drilling period reduces, More than 1,000,000 yuan of drilling cost can be saved;Horizontal segment adopts the drill bit drilling of 215.9mm, and such as down-hole complex situations, because of well Eye diameter is more much bigger than three eyes that drive a well, and processing means are more, be easier, and can be prevented effectively from security incident.
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, the size of pressure reduction sliding sleeve is 8.5 inches, and length is 0.94 meter, and external diameter is 177.8 millimeters, opens pressure Power and setting pressure are 38mpa, 149 DEG C of heatproof, and bearing pressure reduction is 70mpa, and after putting into setting ball, setting ball reaches and receives Seat, injects liquid, pressure rise, when reaching certain pressure value, shear pin is cut off, and pressure reduction sliding sleeve is opened, tubing string in pipe In pipe, toric space outer with pressure reduction sliding sleeve pipe connects, and connects with one section of reservoir of shaft bottom foot, pressure reduction sliding sleeve stability in use By force.
6th, the present invention, 9.15 ms/h of full well average rate of penetration, 7.9 ms/h of prior art of ratio, improve 15.8%;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.
7th, the present invention, greatly improves reservoir reconstruction effect, and pressing crack construction discharge capacity is up to 10 cubic meters per minute, more existing It is achieved that transforming to the depth of reservoir for technology 4.8 cubic meters per minute, correctional effect lifting more than 20%.
8th, 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;Contrast coiled tubing band underseal instrument pressure break mode, in segmentation Under number the same terms, average individual well can save instrument, acid solution, more than 1,000,000 yuan of crane cost.
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 wells completion construction method admittedly, comprises the following steps:
S1, an exploitation external diameter are the drill bit of 346mm, are drilled into 750 meters of well depth, and then entering down external diameter is the oval of 273mm Button casing cementing;
S2, two open straight well section adopt external diameter be 222mm drill bit, be drilled into 2850 meters of well depth, two open lower curved section and horizontal segment Full well finishing drilling is got to using the drill bit for 215.9mm for the external diameter;
S3, on drilling tool, order milling post and the solid completion integral tubular column unit of double milling post simulation two boiled water horizontal wells are led to Well, the well the getting out borehole wall is repaired smooth, by place expansion little for borehole diameter;
After s4, drifting are normal, act drilling tool, under enter the solid completion integral tubular column unit of two boiled water horizontal wells;
S5, flushing ground well cementation pipeline, pressure testing 45mpa is qualified;It is implanted sequentially 4m3Clear water, injection density be 1.5kg/m3 Cement mortar neck slurry;
S6, after 1 minute, inject 25m3Cement mortar, the density of described cement mortar is 1.85kg/m3
S7, after 1 minute, be implanted sequentially 5m3Clear water, inject 2m3Sodium carboxymethyl cellulose insulating liquid, reinject 3m3Clear water;
S8, after 1 minute, be implanted sequentially 25m3Klorvess Liquid replace mud, described Klorvess Liquid concentration is 4%;Injection 2m3Sodium carboxymethyl cellulose insulating liquid, after 1 minute elapsed time, throw a diameter of 41.3mm one, setting ball;
S9, continuation injection 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, all open hole packers 8 are whole One-shot, realizes sealing;
Solidifying 48 hours of s10, time, open pressure reduction sliding sleeve 7, electrical measurement cementing quality.
The two boiled water horizontal well horizontal segments that formed by above-mentioned steps 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;When reservoir inclination angle, reservoir properties occur large change, because annular clearance is larger, the rail larger so as to enter line amplitude Mark adjusts, and motility is strong, and cementing operation difficulty is little, low cost of cementing the well;Two open lower curved section and horizontal segment to adopt external diameter be 215.9mm Drill bit get to full well finishing drilling, compared with for prior art, rate of penetration improves more than 15%;And reduce an electrical measurement, setting of casing, Well cementation, average individual well drilling period shortens more than 15 days;Because drilling period reduces, more than 1,000,000 yuan of drilling cost can be saved;Water Flat section adopts the drill bit drilling of 215.9mm, and complex situations in such as down-hole, because borehole diameter is more much bigger than three eyes that drive a well, processes Means are more, be easier, and can be prevented effectively from security incident.
Embodiment 2
A kind of two boiled water horizontal wells completion construction method admittedly, comprises the following steps:
S1, an exploitation external diameter are the drill bit of 346mm, are drilled into 750 meters of well depth, and then entering down external diameter is the oval of 273mm Button casing cementing;
S2, two open straight well section adopt external diameter be 222mm drill bit, be drilled into 2850 meters of well depth, two open lower curved section and horizontal segment Full well finishing drilling is got to using the drill bit for 215.9mm for the external diameter;
S3, on drilling tool, order milling post and the solid completion integral tubular column unit of double milling post simulation two boiled water horizontal wells are led to Well, the well the getting out borehole wall is repaired smooth, by place expansion little for borehole diameter;
After s4, drifting are normal, act drilling tool, under enter the solid completion integral tubular column unit of two boiled water horizontal wells;
S5, flushing ground well cementation pipeline, pressure testing 45mpa is qualified;It is implanted sequentially 4m3Clear water, injection density be 1.5kg/m3 Cement mortar neck slurry;
S6, after 1 minute, inject 25m3Cement mortar, the density of described cement mortar is 1.9kg/m3
S7, after 1 minute, be implanted sequentially 5m3Clear water, inject 2m3Sodium carboxymethyl cellulose insulating liquid, reinject 3m3Clear water;
S8, after 1 minute, be implanted sequentially 26m3Klorvess Liquid replace mud, described Klorvess Liquid concentration is 4%;Injection 2m3Sodium carboxymethyl cellulose insulating liquid, after 1 minute elapsed time, throw a diameter of 41.3mm one, setting ball;
S9, continuation injection 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, all open hole packers 8 are whole One-shot, realizes sealing;
Solidifying 48 hours of s10, time, open pressure reduction sliding sleeve 7, electrical measurement cementing quality.
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 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.
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 wells completion construction method admittedly, comprises the following steps:
S1, an exploitation external diameter are the drill bit of 346mm, are drilled into 750 meters of well depth, and then entering down external diameter is the oval of 273mm Button casing cementing;
S2, two open straight well section adopt external diameter be 222mm drill bit, be drilled into 2850 meters of well depth, two open lower curved section and horizontal segment Full well finishing drilling is got to using the drill bit for 215.9mm for the external diameter;
S3, on drilling tool, order milling post and the solid completion integral tubular column unit of double milling post simulation two boiled water horizontal wells are led to Well, the well the getting out borehole wall is repaired smooth, by place expansion little for borehole diameter;
After s4, drifting are normal, act drilling tool, under enter the solid completion integral tubular column unit of two boiled water horizontal wells;
S5, flushing ground well cementation pipeline, pressure testing 45mpa is qualified;It is implanted sequentially 4m3Clear water, injection density be 1.5kg/m3 Cement mortar neck slurry;
S6, after 1 minute, inject 25m3Cement mortar, the density of described cement mortar is 1.92kg/m3
S7, after 1 minute, be implanted sequentially 5m3Clear water, inject 2m3Sodium carboxymethyl cellulose insulating liquid, reinject 3m3Clear water;
S8, after 1 minute, be implanted sequentially 30m3Klorvess Liquid replace mud, described Klorvess Liquid concentration is 4%;Injection 2m3Sodium carboxymethyl cellulose insulating liquid, after 1 minute elapsed time, throw a diameter of 41.3mm one, setting ball;
S9, continuation injection 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, all open hole packers 8 are whole One-shot, realizes sealing;
Solidifying 48 hours of s10, time, open pressure reduction sliding sleeve 7, electrical measurement cementing quality.
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 size of described pressure reduction sliding sleeve 7 be 8.5 inches, length be 0.94 meter, external diameter be 177.8 millimeters, Opening pressure and Setting pressure is 38mpa, 149 DEG C of heatproof, and bearing pressure reduction is 70mpa.
In described step s4, drifting is just referring to drilling tool and is above carrying do not block, and transfers non-resistance.
In described step s9, injection pressure is 40mpa.
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.
The size of pressure reduction sliding sleeve is 8.5 inches, and length is 0.94 meter, and external diameter is 177.8 millimeters, Opening pressure and setting pressure Power is 38mpa, 149 DEG C of heatproof, and bearing pressure reduction is 70mpa, and after putting into setting ball, setting ball reaches seat of receiving, and notes in pipe Enter liquid, pressure rise, when reaching certain pressure value, shear pin is cut off, pressure reduction sliding sleeve is opened, slide with pressure reduction in tubing string pipe Sleeve pipe outer toric space connection, is connected with one section of reservoir of shaft bottom foot, pressure reduction sliding sleeve stability in use is strong.
Complete 9.15 ms/h of well average rate of penetration, 7.9 ms/h of prior art of ratio, improve 15.8%;With two Compare by the way of coiled tubing carries underseal instrument pressure break after opening well cementation, individual well saves 8.5 days gas testing cycles, individual well saving tries More than 100,000 yuan of gas cost.
Greatly improve reservoir reconstruction effect, pressing crack construction discharge capacity, up to 10 cubic meters per minute, is stood compared with prior art 4.8 It is achieved that transforming to the depth of reservoir for square m/min, correctional effect lifting more than 20%.
Contrast coiled tubing band underseal instrument pressure break, in the case of sand feeding amount is consistent, average individual well can reduce fracturing fluid and use Amount 340m3, save 170,000 yuan of fracturing fluid expense;Contrast coiled tubing band underseal instrument pressure break mode, in segments the same terms Under, average individual well can save instrument, acid solution, more than 1,000,000 yuan of crane cost.
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 (7)

1. a kind of two boiled water horizontal wells consolidate completion construction method it is characterised in that comprising the following steps:
S1, an exploitation external diameter are the drill bit of 346mm, are drilled into 750 meters of well depth, then enter down the oval retaining ring that external diameter is 273mm Pipe is cemented the well;
S2, two open the drill bit that straight well section adopts external diameter to be 222mm, be drilled into 2850 meters of well depth, two open lower curved section and horizontal segment adopts External diameter is that the drill bit of 215.9mm gets to full well finishing drilling;
S3, on drilling tool, order milling post and the solid completion integral tubular column unit of double milling post simulation two boiled water horizontal wells carry out drifting, will The well borehole wall finishing getting out is smooth, by place expansion little for borehole diameter;
After s4, drifting are normal, act drilling tool, under enter the solid completion integral tubular column unit of two boiled water horizontal wells;
S5, flushing ground well cementation pipeline, pressure testing 45mpa is qualified;It is implanted sequentially 4m3Clear water, injection density be 1.5kg/m3Water Mud neck slurry;
S6, after 1 minute, inject 25m3Cement mortar, the density of described cement mortar is 1.85-1.92kg/m3
S7, after 1 minute, be implanted sequentially 5m3Clear water, inject 2m3Sodium carboxymethyl cellulose insulating liquid, reinject 3m3's Clear water;
S8, after 1 minute, be implanted sequentially 25-30m3Klorvess Liquid replace mud, described Klorvess Liquid concentration is 4%;Injection 2m3Sodium carboxymethyl cellulose insulating liquid, after 1 minute elapsed time, throw a diameter of 41.3mm one, setting ball;
S9, continuation injection 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, all open hole packers (8) whole Secondary startup, realizes sealing;
Solidifying 48 hours of s10, time, open pressure reduction sliding sleeve (7), electrical measurement cementing quality.
2. a kind of solid completion construction method of two boiled water horizontal wells according to claim 1 it is characterised in that: described two boiled water are put down The solid completion integral tubular column unit of well, includes sleeve pipe (1), the tubing string (2) in sleeve pipe (1), tubing string (2) from top to bottom by erecting Straight section (3), tilting section (4) and horizontal segment (5) constitute, is arranged on horizontal segment (5) pitching sliding sleeve (6), 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 Individual, it is provided with a pitching sliding sleeve (6) between the adjacent open hole packer of any two (8), described tubing string (2) is from top to bottom successively By 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 Sliding sleeve (6).
3. a kind of solid completion construction method of two boiled water horizontal wells according to claim 2 it is characterised in that: along tubing string (2) from Under identical to the external diameter of the pitching sliding sleeve (6) above setting gradually, internal diameter is gradually increased.
4. a kind of solid completion construction method of two boiled water horizontal wells according to claim 2 it is characterised in that: described self-styled ball seat (11) include ball-and-seat (12) and the seat of receiving (13) linking together, seat of receiving (13) is located at the top of ball-and-seat (12).
5. a kind of solid completion construction method of two boiled water horizontal wells according to claim 2 it is characterised in that: described pressure reduction sliding sleeve (7) size is 8.5 inches, and length is 0.94 meter, and external diameter is 177.8 millimeters, and Opening pressure and setting pressure are 38mpa, resistance to 149 DEG C of temperature, bearing pressure reduction is 70mpa.
6. a kind of solid completion construction method of two boiled water horizontal wells according to claim 1 it is characterised in that: described step s4 In, drifting is just referring to drilling tool and is above carrying do not block, and transfers non-resistance.
7. a kind of solid completion construction method of two boiled water horizontal wells according to claim 1 it is characterised in that: described step s9 In, injection pressure is 40mpa.
CN201610854598.XA 2016-09-27 2016-09-27 Dual-opening horizontal well cementation and completion construction method Pending CN106337667A (en)

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CN109322618A (en) * 2018-10-19 2019-02-12 成都科盛石油科技有限公司 Heterogeneous shale gas well Reservoir Section finishing drilling method

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