CN109281637A - A kind of cementing method suitable for leakiness ultradeep well - Google Patents
A kind of cementing method suitable for leakiness ultradeep well Download PDFInfo
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- CN109281637A CN109281637A CN201811211326.3A CN201811211326A CN109281637A CN 109281637 A CN109281637 A CN 109281637A CN 201811211326 A CN201811211326 A CN 201811211326A CN 109281637 A CN109281637 A CN 109281637A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000012530 fluid Substances 0.000 claims abstract description 65
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 239000002002 slurry Substances 0.000 claims description 60
- 238000010276 construction Methods 0.000 claims description 43
- 239000004568 cement Substances 0.000 claims description 39
- 238000005553 drilling Methods 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 17
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000013461 design Methods 0.000 claims description 13
- 238000011010 flushing procedure Methods 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000003345 natural gas Substances 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 4
- 230000008719 thickening Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 208000034656 Contusions Diseases 0.000 description 1
- 241000269793 Cryothenia peninsulae Species 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention relates to a kind of cementing methods suitable for leakiness ultradeep well, belong to petroleum natural gas exploration field.The present invention is first by the casing string with stage cementing device down toward shaft bottom, the first link cementing fluid is injected into casing, the following annular space well section of sealing leakage layer, then suitable second link cementing fluid is selected, then stage cementing device aperture operation is carried out, fluid channel is changed to stage cementing device duct by shaft bottom, the second link cementing fluid is injected into casing again, stage cementing device is carried out later closes hole operation, sealing leakage layer is to the following annular space well section in upper layer pipe shoe position, finally to upper layer casing with originally open that casing annulus is counter to be infused, inject third link cementing fluid, by upper layer casing with originally open casing annulus and seal entirely.Compared with the existing technology, the present invention chooses suitable cementing fluid, considerably reduces annular space and lose envelope rate, effectively improve whole casing sealing rate and cementing quality by the way that suitable stage cementing device position is arranged.
Description
Technical field
The present invention relates to a kind of cementing methods suitable for leakiness ultradeep well, belong to petroleum natural gas exploration field.
Background technique
Ultradeep well often uses multilevel structure on well structure design both at home and abroad at present, but as exploration and development mentions
The requirement of effect simplifies casing programme and gradually starts to popularize in ultradeep well.Its bring direct result be naked eye segment length substantially
Increase, bore and meet more set strata pressure systems, the risk of wellbore leakage obviously increases.Complete well depth is crept into using plugging while drilling,
Most wells are missed during setting of casing, and circulation cannot be established before well cementation, and well cementation difficulty is larger.And continuous whole and performance
Excellent cement sheath is the key that oil in ultra-deep wellbore long term seal ability, and cementing quality directly determines and influence the complete of cement sheath
Property.
For leakiness ultradeep well, two-stage cementing construction technology is relatively mostly used at present, using low weight cement slurry, but still
It is more than that leakage strata pressure causes well cementation to be missed, while missing to reduce there are head of liquid in level-one, second level well cementing operation
And reduce and replace discharge capacity, Flooding Efficiency is affected, causes sealing quality bad.In addition, construction is instead squeezed by positive injection, it is counter to squeeze into
Cement slurry is difficult sealing long open hole stratum, only can sealing upper layer casing overlay segment, casing lose envelope rate it is excessively high, cementing quality is difficult to
Guarantee.No matter conventional two-stage cementing or positive injection, which are instead squeezed well cementation most of casing easy to form and lost, is sealed, and oil gas has been seriously affected
Well service life.
Summary of the invention
The object of the present invention is to provide a kind of cementing methods suitable for leakiness ultradeep well to solve current leakiness ultradeep well
Well cementation sealing quality is bad, there are problems that most of casing loses envelope.
In order to solve the above technical problems, the present invention proposes a kind of cementing method suitable for leakiness ultradeep well, this method packet
Include following steps:
1) determine that cementing operation data, cementing operation data include missing position of stratum and missing the brill chance on stratum, block up
Leak data；
2) riding position of the design stage cementing device on casing string guarantees that riding position is located at leakage in cementing operation
It loses above position of stratum at set distance, then injects the casing string with stage cementing device into casing down toward shaft bottom
First link cementing fluid, the following annular space well section in sealing leakage stratum；
3) stage cementing device aperture operation is carried out, fluid channel is changed to stage cementing device duct by shaft bottom, then
The second link cementing fluid is injected into casing, is carried out stage cementing device later and is closed hole operation, sealing leakage stratum to upper layer set
Pipe pipe shoe position annular space well section below；
4) inject third link cementing fluid, open to upper layer casing and originally that casing annulus is counter to be infused, by upper layer casing with originally open set
The empty full envelope of pipe ring.
Further, step 3) further includes selecting suitable second link solid according to brill chance, the leak stopping data on leakage stratum
Well liquid, the brill on the leakage stratum is met, leak stopping data include boring to meet leakage position of stratum drilling fluid and plugging drilling fluid, the second link
Cementing fluid meets
ρzgh≤∑pi≤ρdgh
Wherein, PiFor the pressure that each slurry in the second link cementing fluid generates leakage position of stratum, unit MPa；ρzFor
It bores and meets leakage position of stratum drilling fluid density, unit g/cm3；ρdFor plugging drilling fluid density, unit g/cm3；G is gravity
Acceleration, unit m/s2；H is leakage position of stratum vertical depth, unit m.
Further, which meets leakage position of stratum drilling fluid and plugging drilling fluid meets
pf≤(ρd-ρz)gh
Wherein, PfFor annular circulation frictional resistance in part on loss horizon, unit MPa.
Further, which includes leak stopping slurry, well cementation flushing liquor, insulating liquid, cement slurry and rear top set
For liquid.
Further, the leak stopping grain diameter in leak stopping slurry is less than the leak stopping grain diameter in sealing fluid while drilling.
Further, each slurry of the second link cementing fluid injection sequence be leak stopping slurry, well cementation flushing liquor, insulating liquid,
Cement slurry and postposition displacement fluid.
Further, which is 400 meters to 600 meters.
Further, discharge capacity when replacement discharge capacity of the step 2) into step 4) cementing operation is not less than drifting, the replacement
The calculation formula of discharge capacity is as follows
Wherein, Q is to replace circulation discharge capacity, unit L/s；QtDischarge capacity, unit L/s are recycled to replace；StWhen for drifting
Annular space sectional area, unit cm2；SgAnnular space sectional area when to cement the well, unit cm2。
Further, which includes well cementation flushing liquor, insulating liquid, cement slurry and postposition displacement fluid.
Further, which includes well cementation flushing liquor and cement slurry.
The beneficial effects of the present invention are: the present invention can be directed to what loss horizon clearly and in drilling process was missed repeatedly
When ultradeep well carries out well cementing operation, successively using the cementing well construction of three links, the present invention pacifies stage cementing device
It sets in place, while the cement slurry wastage of the second link cementing well construction is reduced or avoided, takes into account the
The sealing effect of one link cementing well construction, while according to the brill chance on leakage stratum, leak stopping data selection suitable second
Link cementing fluid guarantees that slurry a part of the second link construction injection enters loss horizon, returns in a part, then cooperate third
Link upper layer casing annulus is counter to infuse construction, answers relative to " positive injection is counter to squeeze " method and two-stage cementing construction what ultradeep well was cemented the well
With, ensure that casing pipe shoe, stage cementing device, overlay segment sealing quality, considerably reduce annular space lose envelope rate, effectively mention
High whole casing sealing rate and cementing quality.
Detailed description of the invention
Fig. 1 is a kind of leakiness ultradeep well cementing well construction schematic diagram of the invention；
Wherein, 1 is pithead position, and 2 be upper layer casing, and 3 be annular space, and 4 is originally open casing, and 5 be stage cementing device position,
6 be leakage stratum, and 7 be non-leakage stratum, and 8 be shaft bottom, and I is the first link cementing well construction area, and II is the second link
Cementing well construction area, III are third link cementing well construction area；
Fig. 2 is the sound width Quality Map of the first link cementing well of embodiment of the present invention construction；
Fig. 3 is the sound width Quality Map of the second link cementing well of embodiment of the present invention construction；
Fig. 4 is the sound width Quality Map of third link cementing well of embodiment of the present invention construction.
Specific embodiment
A specific embodiment of the invention is described further with reference to the accompanying drawing.The present invention consolidates leakiness ultradeep well
Well construction flow setting is three link cementing well constructions, respectively the first link shaft bottom cementing practice, the second link
Stage cementing device cementing practice, third link upper layer casing annulus is counter to infuse construction, and steps are as follows for Specific construction:
1, cementing operation data are determined:
Data needed for determining cementing operation operation, data needed for construction operation include leakage position of stratum, drifting
When circulation discharge capacity, circulation well head pressure, well logging when hole diameter and temperature data etc..It is related to the experiment temperature of cement slurry thickening
Degree, pressure, transit time should determine according to realistic well condition data.
2, shaft bottom cementing practice:
Well cementing operation will guarantee that casing can descend design well depth, by the casing string with stage cementing device down toward well
The first link cementing fluid is injected at bottom into casing, to return to lost-circulation zone bottom circle on the cement slurry in cementing fluid, sealing leakage layer with
Lower annular space well section.First link cementing fluid includes well cementation flushing liquor, insulating liquid, cement slurry and postposition displacement fluid, need to be according to when injection
Secondary injection.
The cement slurry of shaft bottom cementing practice design, which returns height, should control in loss horizon hereinafter, practical cement slurry volume is according to reality
Border hole diameter data and segment length determine.The prepad fluid theoretically designed can enter leakage stratum after replacing to amount, need when injection
Guarantee that sequence is implanted sequentially.
In conventional detail design, stage cementing device is generally placed on loss horizon or more, but in practice of construction
Middle discovery, if stage cementing device is closer from loss horizon, the cement slurry volume missed in the construction of the second link cementing well is just
It is bigger, if stage cementing device is remoter from lost-circulation zone, it will lead to loss horizon in the first link cementing well well section and extremely divide
Casing loses envelope at grade cementing device.Therefore, stage cementing device, which places position, should choose the more stable stratum of the borehole wall, and place
Position needs to take into account the first link note while the cement slurry wastage of the second link cementing well construction is reduced or avoided
The sealing effect of well cementing of cement construction, the optimal location placed by a large amount of execute-in-places and theoretical calculation, stage cementing device
It should be in the above 400-600m interval range of loss horizon.
If circulation can not be established before first link cementing operation, or there are severe leakages for circulation, can also be direct
Carry out the first link construction operation.Design slurry type when construction using this method carries out note and replaces, and controls the thickening of cement slurry
Time should be greater than between construction total time (starting to calculate with cementing) 1 hour to 2 hours.
Stage cementing device aperture operation should be carried out after first link cementing operation, and water flowing eye in not timing top is answered to ensure
Hydrophthalmia is unimpeded.It waits and carries out the second link cementing operation after coagulating 12 hours, it is ensured that the cement slurry shape of the first link cementing operation injection
At Behavior of Hardened Cement Paste developed intensity.
3, stage cementing device cementing practice:
Stage cementing device aperture operation is carried out, fluid channel is changed to stage cementing device duct by shaft bottom, to set
The second link cementing fluid is injected in pipe, to return to upper layer casing pipe shoe position on the cement slurry in cementing fluid hereinafter, sealing leakage
Then layer carries out stage cementing device and closes hole operation to guarantee casing integrality to the following annular space well section in upper layer pipe shoe position.The
Two link cementing fluids successively include fine grained leak stopping slurry, well cementation flushing liquor, insulating liquid, cement slurry and postposition displacement fluid, when injection
Need to guarantee that sequence is implanted sequentially.Wherein, aperture operation and pass hole operation are the routine operation of stage cementing device, are not made herein
It is described in detail.
Before plugging while drilling, loss horizon leakage equal yield density bores the drilling fluid met when lost-circulation zone is missed no more than initial stage
Density.Loss horizon bearing capacity is improved by sealing fluid while drilling in drilling, still, the excitement pressure during setting of casing
The various factors such as plugging slurry aging are missed before will lead to well cementation in power and well；For the stage cementing used to well cementation
Device related seals element integrality considers that the leak stopping grain diameter in the second link injection slurry should be less than plugging while drilling particle
Diameter.Although increasing concentration ratio, it is limited to loss horizon fracture aperture, loss horizon increases receiving pressure and significantly reduces.
Therefore it in the construction of practical cementing well, not only in place by stage cementing device placement, also needs
Suitable second link cementing fluid is chosen, guarantees that the slurry a part injected in the second link cementing operation enters loss horizon,
It is returned in a part, is finally completed the sealing to the second link cementing well construction area.
Specifically, the design of the second link cementing fluid slurry has following limitation:
ρzgh≤∑pi≤ρdgh
pf≤(ρd-ρz)gh
Wherein, ρz, unit g/cm3, bore and meet loss horizon drilling fluid density；ρd, unit g/cm3, plugging drilling fluid density；
G, unit m/s2, acceleration of gravity；H, unit m, loss horizon vertical depth；Pi, units MPa, each slurry of cementing operation is to loss horizon
The pressure of generation；Pf, units MPa, part annular circulation frictional resistance on loss horizon, calculation method is referring to " SY-T5480-1992 note
Cement rheological characteristic design ".
Before second link cementing operation if there are still that can not establish circulation, or there are the feelings of severe leakage for circulation
Condition can directly carry out the second link cementing operation operation, and the head of liquid and operational discharge capacity of this injection slurry directly determine
Cement slurry returns height, control cement slurry thickening time should be greater than construction total time (starting to calculate with cementing) it is 1 hour to 2 small
When between.
4, upper layer casing annulus is counter infuses construction:
From upper layer casing with originally open that casing annulus is counter to be infused, inject third link cementing fluid, open upper layer casing and originally casing
Annular space seals entirely, completes the cementing operation to ultradeep well.Third link cementing fluid successively includes well cementation flushing liquor and cement slurry, injection
When need guarantee sequence be implanted sequentially.
The casing annulus anti-cement slurry segment length for infusing detail design in upper layer is upper layer casing and originally open the segment length of casing overlay segment,
Cement slurry volume is advisable by practical calculation amount additional 20% or more.Before upper layer casing annulus is instead infused, drilling crew should be waited to sit and hang well head
Complete, and it is qualified to associated seal pressure testing after carry out, the thickening time for controlling cement slurry should be greater than construction half an hour extremely
Between 1.5 hours.
When carrying out above-mentioned cementing operation, replacement discharge capacity should be not less than discharge capacity when drifting, and calculation formula is as follows
Wherein, Q, unit L/s replace circulation discharge capacity；Qt, unit L/s, replacement circulation discharge capacity；St, unit cm2, when drifting
Annular space sectional area；Sg, unit cm2, annular space sectional area when well cementation.It should be noted that being infused in the first link and the second link
Early period generates U-typed tube effect when well cementing of cement construction replaces, and construction, which replaces discharge capacity, may be slightly larger than the calculating data, but pressure of constructing
Well head pressure when power should be controlled lower than drifting.
Third link cementing operation, when slip casting, should control operation pressure, maximum pressure be not to be exceeded casing head bearing capacity,
The minimum value of the anti-internal pressure of upper layer casing and the anti-outer crowded safe pressure for originally opening time casing.It should be mentioned as far as possible in cementing truck injection process
High discharge capacity can effectively reduce slurry in pipe.
Embodiment:
SHB1-4H well φ 193.7mm casing cementing, the well are a bite development wells being deployed in along northern oil gas field.This well is adopted
With quaternary structure, one opens φ 273.1mm casing setting depth 1999.3m, two open in complete well depth 6840m, design casing setting depth
Repeatability leakage is occurred in drilling process, is crept into using leak stopping into complete, loss horizon is clear, in setting of casing for 6838m, the well
Well head mistake in the process is returned, and casing is smoothly transferred in place, and circulation cannot be established before cementing operation.
It is constructed using this construction method, process is as follows:
(1) according to this construction method using three link constructions, construction link schematic diagram is shown in attached drawing 1.
(2) for the well loss horizon between 4436-4886m, loss horizon is clear, practical stage cementing device placement location
In 3959.13-3958.12m.
The construction of (3) first links, injects flushing liquor 6m3, insulating liquid 15m3, cement slurry 98m3, calculate and manage according to hole diameter data
By a height of 4800m is returned, postposition displacement fluid is calculated according to casing internal volume for slurry to amount, for slurry average discharge 2.4m3/min。
(4) stage cementing device aperture operation is carried out, time is 22 hours solidifying, during which intermittence top water flowing eye.
The construction slurry rod structure design of (5) second links is calculated according to this method, and design slurry column is to loss horizon pressure
56.2MPa, substantially equal to maximum allowble pressure, discharge capacity is controlled during replacement causes annular space frictional resistance within the allowable range.The ring
Section is filled with fine grained plugging drilling fluid 20m3, prepad fluid 8m3, cement slurry 65m3, returned according to hole diameter data computational theory a height of
2300m.Postposition displacement fluid is calculated according to casing internal volume for slurry to amount bruising, is carried out closing hole operation to stage cementing device, be replaced
Starch average discharge 2.2m3/min。
(6) third link is constructed, and injects flushing liquor 6m3, cement slurry 55m3, maximum operation pressure 8MPa, much smaller than every peace
Population parameter.
By using this method, first link of the well well cementation well section cementing quality factor of merit is 100%, and sound width quality is shown in figure
Shown in 2, the second link cementing quality acceptance rate is 50%, qualification rate 97%, and as shown in Figure 3, third link is solid for sound width quality
The well quality factor of merit 100%, as shown in Figure 4, the whole well of the well is assessed as high-quality sound width quality.
Casing is opened merely to illustrating the solution of the present invention, in practical behaviour using upper layer casing and originally in Figure of description 1
When making, polysleeve cooperation can be used completely, and stage cementing device is arranged on the correspondence casing of corresponding position, these
The range that the present invention is protected should all be fallen into.
The present invention gives three link cementing fluids specifically to constitute, this is just to preferably illustrating present invention side
Case, in practice of construction, if construction cementing fluid slurry is constituted comprising cementing fluid slurry of the present invention composition or slurry function etc.
It is same as each slurry function of the present invention, the range that the present invention is protected should all be fallen into.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.Base of the invention
This thinking is above-mentioned basic scheme, the change carried out without departing from the principles and spirit of the present invention to embodiment
Change, modify, replacement and variant is still fallen in protection scope of the present invention.
Claims (10)
1. a kind of cementing method suitable for leakiness ultradeep well, which is characterized in that specifically comprise the following steps:
1) determine that cementing operation data, the cementing operation data include missing position of stratum and missing the brill chance on stratum, block up
Leak data；
2) riding position of the design stage cementing device on casing string guarantees that the riding position described in cementing operation is located at leakage
It loses above position of stratum at set distance, then injects the casing string with stage cementing device into casing down toward shaft bottom
First link cementing fluid, the following annular space well section in sealing leakage stratum；
3) stage cementing device aperture operation is carried out, fluid channel is changed to stage cementing device duct by shaft bottom, then to set
The second link cementing fluid is injected in pipe, is carried out stage cementing device later and is closed hole operation, sealing leakage stratum to upper layer casing pipe
Shoes position annular space well section below；
4) inject third link cementing fluid, open to upper layer casing and originally that casing annulus is counter to be infused, by upper layer casing with originally open sleeve ring
Empty full envelope.
2. the cementing method according to claim 1 suitable for leakiness ultradeep well, which is characterized in that step 3) further includes root
It is met according to the brill on leakage stratum, leak stopping data select suitable second link cementing fluid, brill chance, the leak stopping data on the leakage stratum
Leakage position of stratum drilling fluid and plugging drilling fluid are met including boring, the second link cementing fluid meets
ρzgh≤∑pi≤ρdgh
Wherein, PiFor the pressure that each slurry in the second link cementing fluid generates leakage position of stratum, unit Mpa；ρzIt is met to bore
Miss position of stratum drilling fluid density, unit g/cm3；ρdFor plugging drilling fluid density, unit g/cm3；G is gravity acceleration
Degree, unit m/s2；H is leakage position of stratum vertical depth, unit m.
3. the cementing method according to claim 2 suitable for leakiness ultradeep well, which is characterized in that the brill meets leakage ground
Layer position drilling fluid and plugging drilling fluid meet
pf≤(ρd-ρz)gh
Wherein, PfFor annular circulation frictional resistance in part on loss horizon, unit MPa.
4. being suitable for the cementing method of leakiness ultradeep well according to claim 3, which is characterized in that the second link well cementation
Liquid includes leak stopping slurry, well cementation flushing liquor, insulating liquid, cement slurry and postposition displacement fluid.
5. being suitable for the cementing method of leakiness ultradeep well according to claim 4, which is characterized in that stifled in the leak stopping slurry
Leak the leak stopping grain diameter that grain diameter is less than in sealing fluid while drilling.
6. being suitable for the cementing method of leakiness ultradeep well according to claim 5, which is characterized in that the second link well cementation
The injection sequence of each slurry of liquid is leak stopping slurry, well cementation flushing liquor, insulating liquid, cement slurry and postposition displacement fluid.
7. according to claim 1 or 2 or 3 or 4 or 5 or 6 cementing methods for being suitable for leakiness ultradeep well, which is characterized in that
The set distance is 400 meters to 600 meters.
8. being suitable for the cementing method of leakiness ultradeep well according to claim 1, which is characterized in that step 2) is solid to step 4)
Replacement discharge capacity in well construction is not less than discharge capacity when drifting, and the calculation formula for replacing discharge capacity is as follows
Wherein, Q is to replace circulation discharge capacity, unit L/s；QtDischarge capacity, unit L/s are recycled to replace；StAnnular space when for drifting
Sectional area, unit cm2；SgAnnular space sectional area when to cement the well, unit cm2。
9. being suitable for the cementing method of leakiness ultradeep well according to claim 1, which is characterized in that the first link well cementation
Liquid includes well cementation flushing liquor, insulating liquid, cement slurry and postposition displacement fluid.
10. being suitable for the cementing method of leakiness ultradeep well according to claim 1, which is characterized in that the third link is solid
Well liquid includes well cementation flushing liquor and cement slurry.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630213A (en) * | 2019-09-26 | 2019-12-31 | 中石化石油工程技术服务有限公司 | Ultra-deep narrow-gap liner cementing method with stratum invader |
| CN111395965A (en) * | 2020-03-23 | 2020-07-10 | 中国石油天然气集团有限公司 | Safe casing running operation method suitable for easily-leaking stratum |
| CN112627753A (en) * | 2020-12-23 | 2021-04-09 | 中煤水文局集团有限公司 | Method for maintaining mud circulation in lost-return stratum |
| CN112664160A (en) * | 2020-12-25 | 2021-04-16 | 中煤地质集团有限公司 | Broken rock stratum well cementation method |
| CN113338849A (en) * | 2021-07-13 | 2021-09-03 | 中石化石油工程技术服务有限公司 | Well cementation method for high-temperature oil and gas well |
| CN114109298A (en) * | 2020-08-26 | 2022-03-01 | 中国石油天然气股份有限公司 | Method for cementing lost-circulation zone well section |
| CN114183070A (en) * | 2021-12-07 | 2022-03-15 | 托普威尔石油技术股份公司 | Drilling method without drilling and closing under pressure |
| CN114856488A (en) * | 2022-02-25 | 2022-08-05 | 中石化石油工程技术服务有限公司 | Construction method of oil field crack karst cave type ultra-deep well leakage backfill cement plug |
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| CN110630213A (en) * | 2019-09-26 | 2019-12-31 | 中石化石油工程技术服务有限公司 | Ultra-deep narrow-gap liner cementing method with stratum invader |
| CN111395965A (en) * | 2020-03-23 | 2020-07-10 | 中国石油天然气集团有限公司 | Safe casing running operation method suitable for easily-leaking stratum |
| CN111395965B (en) * | 2020-03-23 | 2022-03-01 | 中国石油天然气集团有限公司 | Safe casing running operation method suitable for easily-leaking stratum |
| CN114109298A (en) * | 2020-08-26 | 2022-03-01 | 中国石油天然气股份有限公司 | Method for cementing lost-circulation zone well section |
| CN112627753A (en) * | 2020-12-23 | 2021-04-09 | 中煤水文局集团有限公司 | Method for maintaining mud circulation in lost-return stratum |
| CN112627753B (en) * | 2020-12-23 | 2022-05-31 | 中煤水文局集团有限公司 | Method for maintaining mud circulation in lost-return stratum |
| CN112664160A (en) * | 2020-12-25 | 2021-04-16 | 中煤地质集团有限公司 | Broken rock stratum well cementation method |
| CN112664160B (en) * | 2020-12-25 | 2022-11-18 | 中煤地质集团有限公司 | Broken rock stratum well cementation method |
| CN113338849A (en) * | 2021-07-13 | 2021-09-03 | 中石化石油工程技术服务有限公司 | Well cementation method for high-temperature oil and gas well |
| CN113338849B (en) * | 2021-07-13 | 2022-12-30 | 中石化石油工程技术服务有限公司 | Well cementation method for high-temperature oil and gas well |
| CN114183070A (en) * | 2021-12-07 | 2022-03-15 | 托普威尔石油技术股份公司 | Drilling method without drilling and closing under pressure |
| CN114856488A (en) * | 2022-02-25 | 2022-08-05 | 中石化石油工程技术服务有限公司 | Construction method of oil field crack karst cave type ultra-deep well leakage backfill cement plug |
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Application publication date: 20190129 |