CN108456510A - A kind of compound pressure-bearing leak stopping slurry, preparation method and construction method - Google Patents
A kind of compound pressure-bearing leak stopping slurry, preparation method and construction method Download PDFInfo
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- CN108456510A CN108456510A CN201710089946.3A CN201710089946A CN108456510A CN 108456510 A CN108456510 A CN 108456510A CN 201710089946 A CN201710089946 A CN 201710089946A CN 108456510 A CN108456510 A CN 108456510A
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- slurry
- consolidation
- well
- bridge blinding
- leak stopping
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- 239000002002 slurry Substances 0.000 title claims abstract description 106
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 150000001875 compounds Chemical class 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims description 5
- 238000007596 consolidation process Methods 0.000 claims abstract description 64
- 239000000126 substance Substances 0.000 claims abstract description 23
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 19
- 238000005553 drilling Methods 0.000 claims abstract description 16
- 229920002472 Starch Polymers 0.000 claims abstract description 9
- 239000011083 cement mortar Substances 0.000 claims abstract description 9
- 239000008107 starch Substances 0.000 claims abstract description 9
- 235000019698 starch Nutrition 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 241000758789 Juglans Species 0.000 claims description 17
- 235000009496 Juglans regia Nutrition 0.000 claims description 17
- 235000020234 walnut Nutrition 0.000 claims description 17
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000004568 cement Substances 0.000 claims description 8
- 239000010425 asbestos Substances 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 229910052895 riebeckite Inorganic materials 0.000 claims description 6
- 210000002268 wool Anatomy 0.000 claims description 6
- 239000003129 oil well Substances 0.000 claims description 5
- 108010077119 high density lipoprotein-1 Proteins 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 9
- 230000002688 persistence Effects 0.000 abstract description 3
- 238000007613 slurry method Methods 0.000 abstract 1
- 230000008859 change Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000008719 thickening Effects 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of compound pressure-bearing leak stopping slurry and construction methods.Leak stopping is starched：Bridge blinding is starched and consolidation slurry；Consolidation slurry is that cement mortar or chemical consolidation are starched.Construction method includes：Lower polish drill rod is pumped into bridge blinding slurry, covers weak floor and top 100m well sections to weak floor bottom, it rises and is drilled into 100m on weak formation, injection consolidation slurry rises and is drilled into 100m on consolidation Starch Level, closing well, well head slowly pressurizes, and after 2/3rds or more consolidation slurry is suppressed stratum, waits and coagulates for 24 hours, it drives a well, it changes after drilling tool sweeps plug, pressure testing, it is qualified then continue to creep into.During bridge blinding leakage and consolidation slurry are used in combination, bridge blinding slurry plays the role of supporting weak formation, occluding member leakage channel conducive to the consolidation slurry delay subsequently followed up, it is detained in leakage channel after consolidation slurry follow-up, is thickened, consolidation, form permanent plugged zone, pressure-bearing effect persistence is good, later stage wellbore construction will not leak again, ensure being normally carried out for wellbore construction.
Description
Technical field
The present invention relates to drilling technology fields, further say, be related to a kind of compound pressure-bearing leak stopping slurry, preparation method and
Construction method.
Background technology
In Process of Oil Well Drilling, due to the limitation of casing programme, the different stratum of pressure coefficient is in same barefoot interval,
To avoid low-pressure stratum from missing, needs to carry out pressurization sealing to it, to improve bearing capacity, ensure the safety of wellbore construction
It carries out.During pressurization sealing, the method that generally use bridges class method or cement consolidation, by bridge blinding slurry or cement etc. suppress into
The bearing capacity on stratum is improved on stratum.Bridge starch class method pressure-bearing when, bridge blinding slurry in the common heat-resisting property of granular materials cannot,
It can carbonize at high temperature, strength reduction, pressure-bearing effect be influenced, and bridge blinding slurry anti-reflective row's performance is poor, in pit shaft surge pressure
Under the influence of, it counter can spit to pit shaft, lead to the consequence of pressure-bearing effect difference, multiple leakage easily occurs in later stage drilling process；Cement class consolidates
When starching pressure-bearing, since fluidity of slurry is good, it is not easy to be detained in leakage channel, it is difficult to reach ideal pressure-bearing effect.
It is typically individually to starch or consolidate slurry using bridge blinding to carry out pressurization sealing operation in the prior art；Also there is bridge blinding
When slurry and consolidation slurry are used in combination, but bridge blinding slurry only plays an insulation blocking, prevents consolidation slurry from being starched by well and pollutes,
It is difficult to play good plugging effect.
Invention content
To solve the problem in the prior art, the present invention provides a kind of compound pressure-bearing leak stopping slurry, preparation method and
Construction method.During being leaked bridge blinding and consolidating slurry compound use, bridge blinding slurry, which plays, supports weak formation, envelope
The effect that the consolidation slurry that stifled partial loss channel is conducive to subsequently follow up is detained is detained in leakage channel after consolidation slurry follow-up, is thick
Change, consolidation, form permanent plugged zone, pressure-bearing effect persistence is good, and later stage wellbore construction will not leak again, ensure wellbore construction just
Often carry out.
An object of the present invention is to provide a kind of compound pressure-bearing leak stopping slurry.
Including：
Bridge blinding is starched and consolidation slurry；
Bridge blinding slurry includes the following component counted in parts by weight：
The bridge blinding slurry is to be prepared according to the following steps：
The component is by the obtained bridge blinding slurry after dosage mixing.
The consolidation slurry is that cement mortar or chemical consolidation are starched.
Wherein, preferably：
The particle size range of the thick walnut shell is 2-4mm；
The particle size range of the middle walnut shell is 1-2mm；
The grain size of the thin walnut shell is less than 1mm；
The particle size range of the calcium carbonate superfine powder is 200-800 mesh；
The length of the asbestos wool is 1-5mm.
Cement mortar is the density prepared by oil-well cement in 1.75-1.90g/cm3Slurries；More preferable density is in 1.80-
1.90g/cm3；Its thickening time adjusts according to polish drill rod depth of setting and weak formation temperature, it is ensured that suppresses before crowded operation terminates
It is not thickened.Oil-well cement is commercially available.
It is 1.20-1.75g/cm that the chemical consolidation slurry, which is with the chemical consolidation plugging material HDL-1 density prepared,3Slurry
Liquid, more preferable density is in 1.40-1.70g/cm3.Its thickening time adjusts according to polish drill rod depth of setting and weak formation temperature
It is whole, it is ensured that suppress before crowded operation terminates and be not thickened.The solid plugging material HDL-1 of chemistry is commercially available.
The second object of the present invention is to provide a kind of construction method of compound pressure-bearing leak stopping slurry.
Including：
Lower polish drill rod is pumped into bridge blinding slurry, covers weak floor and top 100m well sections to weak floor bottom, rises and is drilled into weak ground
100m on layer, injection consolidation slurry, rises and is drilled into 100m on consolidation Starch Level, and closing well, well head slowly pressurizes, by 2/3rds with
On consolidation slurry suppress stratum after, wait it is solidifying drives a well for 24 hours, change after drilling tool sweeps plug, pressure testing, it is qualified then continue to creep into.
The present invention compared with construction method it is different, when the blocking construction of the prior art, after injection bridge blinding slurry, motionless drilling tool
(not pulling out of hole) is pumped directly into consolidation slurry, and consolidation slurry in this way is below, and what bridge blinding slurry entered drop ply above, when suppressing crowded is consolidation
Slurry, bridge blinding slurry do not enter drop ply, because not having granular materials in consolidation slurry, cannot play the role of retardance, be unfavorable for being detained；And
The leak-blocking construction method of the present invention is after injecting bridge blinding slurry, rises and is drilled into bridge blinding slurry above, reinjects consolidation slurry, such bridge blinding slurry
Below, consolidation slurry is above, and when suppressing crowded, bridge blinding slurry is introduced into drop ply and plays that support weak formation, occluding member leakage logical
The effect in road, the consolidation slurry for being conducive to follow-up are detained.
The method that the present invention starched and consolidated slurry cooperation using bridge blinding improves Formation bearing pressure.First injection bridge blinding slurry, makes low
It presses formation fracture to open, tentatively improves Formation bearing pressure；Injection consolidation slurry afterwards, pushes the bridge blinding first injected to starch to earth formation deep
It is mobile, Formation bearing pressure is further increased, the consolidation of good fluidity is starched under the barrier that bridge blinding is starched, stagnant in nearly near wellbore
It stays, permanently improves Formation bearing pressure.
Bridge blinding slurry is first suppressed and supports to form crack into weak formation by being characterized in that for the construction method of the present invention, subsequent
The consolidation slurry of follow-up is detained in crack content and is thickened, consolidates, and forms permanent plugged zone.Specifically, bridge blinding slurry is introduced into weakness
Stratum (the low stratum of pressure coefficient) simultaneously supports leakage channel, enters in the leakage channel supported after the consolidation slurry of follow-up, and
And the slurry of the bridge blinding due to being introduced into lives partial loss channel blockage, be conducive to heel into consolidation starch and be detained, and then be thickened, be solid
Knot, forms long-acting plugged zone.Therefore, pressure-bearing effect persistence is good, and later stage wellbore construction will not leak again, ensure wellbore construction just
Often carry out.
Specific implementation mode
With reference to embodiment, further illustrate the present invention.
Following components is parts by weight, and chemical consolidation slurry is that Sinopec petroleum works Institute for Research and Technology produces, remaining is each
Component Source is commercially available.Well slurry is water-base drilling fluid used in live drilling process.
Embodiment 1：
1. bridge blinding is starched
Well is starched：100
Middle walnut shell (1-2mm)：2
Thin walnut shell (being less than 1mm)：4
Calcium carbonate superfine powder QS-2 (400 mesh)：3
Shielding diverting agent：5
Asbestos wool (1-2mm)：1
Sawdust：0.5
2. consolidation slurry
Cement mortar, density 1.85g/cm3, thickening time 3h, intensity is more than 7MPa for 24 hours
3. work progress
Lower polish drill rod is pumped into bridge blinding slurry covering weak floor and top 100m well sections to shaft bottom, rise be drilled into weak formation it
Upper 100m injects cement mortar, rises and is drilled into 100m on cement grout face, closing well, well head slowly pressurizes, by 2/3rds or more
After cement mortar suppresses stratum, wait it is solidifying drives a well for 24 hours, change after drilling tool sweeps plug, pressure testing, it is qualified then continue to creep into.
Embodiment 2：
1. bridge blinding is starched
Well is starched：100
Thick walnut shell (2-4mm)：2
Middle walnut shell (1-2mm)：4
Thin walnut shell (being less than 1mm)：5
Calcium carbonate superfine powder QS-2：6
Shielding diverting agent：4
Asbestos wool (2-3mm)：1.5
Sawdust：0.5
2. consolidation slurry
Chemical consolidation is starched, density 1.45g/cm3, thickening time 4h, intensity is more than 12MPa for 24 hours
3. work progress
Lower polish drill rod is pumped into bridge blinding slurry covering weak floor and top 100m well sections to shaft bottom, rise be drilled into weak formation it
Upper 100m, injection chemical consolidation slurry, rises and is drilled into 100m on chemical consolidation Starch Level, closing well, and well head slowly pressurizes, by three/
After two or more chemical consolidation slurry suppresses stratum, wait it is solidifying drives a well for 24 hours, change after drilling tool sweeps plug, pressure testing, it is qualified then continue to creep into.
Embodiment 3：
1. bridge blinding is starched
Well is starched：100
Thick walnut shell (2-4mm)：3
Middle walnut shell (1-2mm)：5
Thin walnut shell (being less than 1mm)：7
Calcium carbonate superfine powder QS-2：8
Shielding diverting agent：2
Asbestos wool (1-2mm)：0.5
Sawdust：0.5
2. consolidation slurry
Chemical consolidation is starched, density 1.65g/cm3, thickening time 4h, intensity is more than 15MPa for 24 hours
3. work progress
Lower polish drill rod is pumped into bridge blinding slurry covering weak floor and top 100m well sections to shaft bottom, rise be drilled into weak formation it
Upper 100m, injection chemical consolidation slurry, rises and is drilled into 100m on chemical consolidation Starch Level, closing well, and well head slowly pressurizes, by three/
After two or more chemical consolidation slurry suppresses stratum, wait it is solidifying drives a well for 24 hours, change after drilling tool sweeps plug, pressure testing, it is qualified then continue to creep into.
Embodiment 4：
Certain well, two open borehole diameter 320mm, in drilling process after 1340.00~1610.00m of well depth is missed, profit
After carrying out pressure-bearing operation to the well section with bridge blinding slurry, Formation bearing pressure is by equal yield density 1.37g/cm3It improves to equal yield density
1.65g/cm3, continue drilling to 2500m, which misses again, and thinking that bridge blinding slurry is ineffective causes to leak again
It loses, carries out pressure-bearing in the way of bridge blinding slurry and chemical consolidation slurry compound pressure-bearing, after pressure-bearing construction, Formation bearing pressure reaches equivalent
Density 1.70g/cm3, do not miss again in follow-up drilling process, smoothly complete two and spud in well construction.
Bridge blinding is starched as follows with formula and work progress in chemical consolidation slurry compound pressure-bearing Process of Leaking Stoppage：
1. bridge blinding is starched
Well is starched：100
Thick walnut shell (2-4mm)：2
Middle walnut shell (1-2mm)：4
Thin walnut shell (being less than 1mm)：6
Calcium carbonate superfine powder QS-2：5
Shielding diverting agent：3
Asbestos wool (1-2mm)：2
Sawdust：1
2. consolidation slurry
Chemical consolidation is starched, density 1.45g/cm3, thickening time 4h30min, intensity is more than 10MPa for 24 hours
3. work progress
Lower polish drill rod is pumped into bridge blinding slurry 30m to 1610m3, rise and be drilled into 1240m, be pumped into chemical consolidation slurry 34m3, rise and be drilled into
700m, closing well, well head slowly pressurize, by 25m3After chemical consolidation slurry suppresses stratum, wait it is solidifying drives a well for 24 hours, change after drilling tool sweeps plug,
Pressure testing, shaft bottom bearing capacity reach equal yield density 1.70g/cm3, continue to creep into.
Claims (7)
1. a kind of compound pressure-bearing leak stopping slurry, it is characterised in that the leak stopping, which is starched, includes：
Bridge blinding is starched and consolidation slurry；
Bridge blinding slurry includes the following component counted in parts by weight：
The consolidation slurry is that cement mortar or chemical consolidation are starched.
2. compound pressure-bearing leak stopping slurry as described in claim 1, it is characterised in that：
The particle size range of the thick walnut shell is 2-4mm；
The particle size range of the middle walnut shell is 1-2mm；
The grain size of the thin walnut shell is less than 1mm；
The particle size range of the calcium carbonate superfine powder is 200-800 mesh；
The length of the asbestos wool is 1-5mm.
3. compound pressure-bearing leak stopping slurry as described in claim 1, it is characterised in that：
Cement mortar is the density prepared by oil-well cement in 1.75-1.90g/cm3Slurries；
It is 1.20-1.75g/cm that the chemical consolidation slurry, which is with the chemical consolidation plugging material HDL-1 density prepared,3Slurries.
4. compound pressure-bearing leak stopping slurry as described in claim 1, it is characterised in that：
5. compound pressure-bearing leak stopping slurry as claimed in claim 3, it is characterised in that：
Cement mortar is the density prepared by oil-well cement in 1.80-1.90g/cm3Slurries；
Chemical consolidation slurry is the density with the HDL-1 preparations of chemical consolidation plugging material in 1.40-1.70g/cm3Slurries.
6. the compound pressure-bearing leak stopping slurry as described in one of Claims 1 to 5, it is characterised in that：
The bridge blinding slurry is to be prepared according to the following steps：
The component is by the obtained bridge blinding slurry after dosage mixing.
7. a kind of construction method of compound pressure-bearing leak stopping slurry as described in one of claim 1~6, it is characterised in that the method
Including：
1) polish drill rod is pumped into bridge blinding slurry, controls bridge blinding slurry amount to weak floor bottom under, make bridge blinding slurry cover entire weak floor and on
Portion's 100m well sections rise and are drilled into 100m on weak formation, injection consolidation slurry；
2) it rises and is drilled into 100m on consolidation Starch Level, closing well, well head slowly pressurizes, and 2/3rds or more consolidation slurry is suppressed into ground
After layer, waits and coagulate for 24 hours；
3) it drives a well, changes after drilling tool sweeps plug, pressure testing, it is qualified then continue to creep into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710089946.3A CN108456510B (en) | 2017-02-20 | 2017-02-20 | Composite pressure-bearing leakage-stopping slurry, preparation method and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710089946.3A CN108456510B (en) | 2017-02-20 | 2017-02-20 | Composite pressure-bearing leakage-stopping slurry, preparation method and construction method |
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| Publication Number | Publication Date |
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| CN108456510A true CN108456510A (en) | 2018-08-28 |
| CN108456510B CN108456510B (en) | 2020-07-24 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109488249A (en) * | 2018-10-31 | 2019-03-19 | 中国石油集团川庆钻探工程有限公司 | Method for preventing leaking stoppage cement slurry from being diluted by stratum or shaft fluid |
| CN109538158A (en) * | 2018-10-31 | 2019-03-29 | 中国石油集团川庆钻探工程有限公司 | Method for improving cement paste leaking stoppage construction success rate |
| CN111764866A (en) * | 2020-06-08 | 2020-10-13 | 中海石油(中国)有限公司深圳分公司 | Leaking stoppage method for leakage stratum |
| CN112031703A (en) * | 2020-09-03 | 2020-12-04 | 中石化石油工程技术服务有限公司 | Comprehensive leaking stoppage method for cavern type leakage |
| CN112253042A (en) * | 2020-10-28 | 2021-01-22 | 北京中海沃邦能源投资有限公司 | Leakage stopping method |
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| CN1432620A (en) * | 2002-01-14 | 2003-07-30 | 中国石油化工股份有限公司 | Temporary leakage-stopping agent for well drilling shielding and its application |
| CN102434124A (en) * | 2010-09-29 | 2012-05-02 | 中国石油化工股份有限公司 | Successive-compounding-process based plugging method for well drilling |
| CN102977866A (en) * | 2012-12-21 | 2013-03-20 | 中国海洋石油总公司 | High-water-loss curing plugging agent for plugging fissures |
| CN103087687A (en) * | 2011-10-28 | 2013-05-08 | 中国石油化工股份有限公司 | Anti-backflow leak-stopping agent, preparation method and applications thereof |
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| CN1432620A (en) * | 2002-01-14 | 2003-07-30 | 中国石油化工股份有限公司 | Temporary leakage-stopping agent for well drilling shielding and its application |
| CN102434124A (en) * | 2010-09-29 | 2012-05-02 | 中国石油化工股份有限公司 | Successive-compounding-process based plugging method for well drilling |
| CN103087687A (en) * | 2011-10-28 | 2013-05-08 | 中国石油化工股份有限公司 | Anti-backflow leak-stopping agent, preparation method and applications thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109488249A (en) * | 2018-10-31 | 2019-03-19 | 中国石油集团川庆钻探工程有限公司 | Method for preventing leaking stoppage cement slurry from being diluted by stratum or shaft fluid |
| CN109538158A (en) * | 2018-10-31 | 2019-03-29 | 中国石油集团川庆钻探工程有限公司 | Method for improving cement paste leaking stoppage construction success rate |
| CN111764866A (en) * | 2020-06-08 | 2020-10-13 | 中海石油(中国)有限公司深圳分公司 | Leaking stoppage method for leakage stratum |
| CN111764866B (en) * | 2020-06-08 | 2022-07-26 | 中海石油(中国)有限公司深圳分公司 | Leaking stoppage method for leakage stratum |
| CN112031703A (en) * | 2020-09-03 | 2020-12-04 | 中石化石油工程技术服务有限公司 | Comprehensive leaking stoppage method for cavern type leakage |
| CN112031703B (en) * | 2020-09-03 | 2022-07-15 | 中石化石油工程技术服务有限公司 | Comprehensive leaking stoppage method for cavern type leakage |
| CN112253042A (en) * | 2020-10-28 | 2021-01-22 | 北京中海沃邦能源投资有限公司 | Leakage stopping method |
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| Publication number | Publication date |
|---|---|
| CN108456510B (en) | 2020-07-24 |
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