CN112551928A - Recession-proof cement paste system and preparation method thereof - Google Patents
Recession-proof cement paste system and preparation method thereof Download PDFInfo
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- CN112551928A CN112551928A CN201910918109.6A CN201910918109A CN112551928A CN 112551928 A CN112551928 A CN 112551928A CN 201910918109 A CN201910918109 A CN 201910918109A CN 112551928 A CN112551928 A CN 112551928A
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- 239000004568 cement Substances 0.000 title claims abstract description 94
- 238000002360 preparation method Methods 0.000 title description 5
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 75
- 239000003129 oil well Substances 0.000 claims abstract description 29
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000002270 dispersing agent Substances 0.000 claims abstract description 21
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000002002 slurry Substances 0.000 claims abstract description 14
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 13
- 239000010703 silicon Substances 0.000 claims abstract description 13
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 12
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 34
- 238000005562 fading Methods 0.000 claims description 19
- 239000011812 mixed powder Substances 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 15
- 238000001354 calcination Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 6
- FWBHETKCLVMNFS-UHFFFAOYSA-N 4',6-Diamino-2-phenylindol Chemical compound C1=CC(C(=N)N)=CC=C1C1=CC2=CC=C(C(N)=N)C=C2N1 FWBHETKCLVMNFS-UHFFFAOYSA-N 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 4
- 238000003837 high-temperature calcination Methods 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 2
- 239000012467 final product Substances 0.000 claims description 2
- 239000011440 grout Substances 0.000 claims 1
- 230000036571 hydration Effects 0.000 abstract description 5
- 238000006703 hydration reaction Methods 0.000 abstract description 5
- 230000035699 permeability Effects 0.000 abstract description 5
- 230000007423 decrease Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 2
- 230000002401 inhibitory effect Effects 0.000 abstract description 2
- 229920001897 terpolymer Polymers 0.000 description 16
- 229920000642 polymer Polymers 0.000 description 15
- 239000004372 Polyvinyl alcohol Substances 0.000 description 14
- 229920002451 polyvinyl alcohol Polymers 0.000 description 14
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 13
- 229920000536 2-Acrylamido-2-methylpropane sulfonic acid Polymers 0.000 description 13
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical group OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 description 13
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 13
- -1 aldehyde ketone Chemical class 0.000 description 13
- 238000009833 condensation Methods 0.000 description 13
- 230000005494 condensation Effects 0.000 description 13
- 239000013505 freshwater Substances 0.000 description 13
- 239000011324 bead Substances 0.000 description 11
- 239000011521 glass Substances 0.000 description 11
- YAIQCYZCSGLAAN-UHFFFAOYSA-N [Si+4].[O-2].[Al+3] Chemical compound [Si+4].[O-2].[Al+3] YAIQCYZCSGLAAN-UHFFFAOYSA-N 0.000 description 10
- 230000002265 prevention Effects 0.000 description 8
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 239000004575 stone Substances 0.000 description 7
- 229910021487 silica fume Inorganic materials 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 229920001222 biopolymer Polymers 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000012215 calcium aluminium silicate Nutrition 0.000 description 1
- 239000000404 calcium aluminium silicate Substances 0.000 description 1
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 description 1
- 229940078583 calcium aluminosilicate Drugs 0.000 description 1
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- MKTRXTLKNXLULX-UHFFFAOYSA-P pentacalcium;dioxido(oxo)silane;hydron;tetrahydrate Chemical compound [H+].[H+].O.O.O.O.[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O MKTRXTLKNXLULX-UHFFFAOYSA-P 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0042—Powdery mixtures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- 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
- C09K8/467—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 containing additives for specific purposes
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses an anti-recession cement paste system, which comprises an oil well cement anti-recession agent, wherein the oil well cement anti-recession agent comprises the following components: component (1), silicon dioxide, 30-60 parts; 40-70 parts of component (2), aluminum oxide. The weight of the oil well cement anti-recession agent is 20-40 parts, the fluid loss agent is 1-20 parts, the dispersing agent is 0.1-3 parts, the micro silicon is 0-25 parts, the tributyl phosphate is 0.01-1 part, the retarder is 0.01-2 parts, the density regulator is 0-50 parts, and the water is 35-120 parts, based on 100 parts of the cement. The cement slurry system of the invention can change cement hydration products, improve the compactness of set cement, and reduce the porosity and permeability of the set cement, thereby effectively inhibiting the decline of the oil well cement strength under the high-temperature complex condition of the ultra-deep well.
Description
Technical Field
The invention relates to an anti-recession cement slurry system and a preparation method thereof, in particular to an anti-recession cement slurry system based on active silicon-aluminum oxide and a preparation method thereof, belonging to the technical field of cement slurry preparation.
Background
Along with the deepening of oil and gas exploration and development in China, particularly in western regions, more and more ultra-deep wells are drilled, and the stratum is more complex, so that well cementation also faces new technical challenges, and particularly the problem of the decline of the strength of oil well cement under the complex conditions of the ultra-deep wells at high temperature and high pressure is particularly prominent.
In the process of oil and gas exploitation, the cement ring is in a high-temperature underground environment for a long time, and the mechanical strength, the cementing property and the interlayer packing effect of the set cement must be ensured to meet the requirements in the service period of an oil and gas well. The G-level oil well cement is suitable for oil and gas wells with the temperature lower than 93 ℃, and the phenomenon of rapid decline of mechanical properties can occur when the G-level oil well cement is used at high temperature, namely, the mechanical properties of the G-level oil well cement stone can be rapidly attenuated in a short time and lose the sealing property, so that the service life of the oil and gas wells is influenced.
The external admixture for preventing the strength decline of oil well cement in the well cementation at present mainly comprises quartz sand and the like, and a large number of experiments prove that the SiO-containing admixture is doped into the Portland cement by domestic and foreign scholars2The calcium-silicon ratio of the cement clinker is adjusted, and can be reduced to about 1.0 by increasing the addition, so that a high-temperature stable substance tobermorite silicate is formed, and the cement stone keeps higher strength. The cement stones of the additives in service for a long time in a high-temperature environment of more than 150 ℃ have the phenomena of reduced compressive strength and increased permeability to different degrees, so that the mechanical properties of the additives cannot meet the long-term exploitation requirements of high-temperature oil and gas wells.
Disclosure of Invention
The invention aims to solve the problems that the mechanical properties of the cement paste which is used for a long time in a high-temperature environment of more than 200 ℃ in the prior art cannot meet the long-term exploitation of a high-temperature oil and gas well due to the phenomena of reduced compressive strength and increased permeability in different degrees, and provides a recession prevention cement paste system based on active silicon-aluminum oxide, which can change cement hydration products, improve the compactness of the cement paste, reduce the porosity and permeability of the cement paste and further effectively inhibit the recession of the cement strength of an oil well under the high-temperature complex condition of an ultra-deep well.
According to one aspect of the invention, there is provided an anti-fade cement slurry system comprising an oil well cement anti-fade agent comprising the following components:
component (1), silica, 30 to 60 parts, preferably 35 to 55 parts, more preferably 40 to 50 parts;
component (2), alumina, 40 to 70 parts, preferably 45 to 65 parts, more preferably 50 to 60 parts.
According to a preferred embodiment of the invention, the silica has a particle size in the range of 0.1-0.25 μm.
According to a preferred embodiment of the present invention, the alumina has a particle size ranging from 40 to 7-nm.
According to a preferred embodiment of the invention, the anti-fading agent is prepared by mixing component (1) and component (2).
According to a preferred embodiment of the present invention, the method for preparing the oil well cement deterioration preventing agent comprises the steps of:
(1) respectively activating the component (1) and the component (2);
(2) mixing the activated component (1) and the activated component (2) to obtain the final product.
According to a preferred embodiment of the present invention, the activation is carried out by subjecting the component (1) to high-temperature calcination; the calcining temperature is 800-1200 ℃, and preferably 900-1000 ℃; the calcination time is 10-18h, preferably 12-16 h.
According to a preferred embodiment of the invention, component (2) is activated before mixing and then mixed with component (1).
According to a preferred embodiment of the present invention, the activation is carried out by subjecting the component (2) to high-temperature calcination; the calcining temperature is 400-900 ℃, preferably 500-800 ℃; the calcination time is 6-16h, preferably 8-12 h.
According to a preferred embodiment of the present invention, the step (2) can be performed by a method known to those skilled in the art, for example, by mixing and stirring the activated component (1) and the activated component (2) until the mixture is uniform and observing non-false particles with naked eyes. The anti-fading agent of the present invention is generally a grayish brown powder product.
According to a preferred embodiment of the present invention, the weight of the oil well cement deterioration prevention agent is 20 to 40 parts, preferably 20 to 30 parts, based on 100 parts of cement.
According to a preferred embodiment of the present invention, the cement paste system further comprises the following components in parts by weight, based on 100 parts by weight of cement: 1-20 parts of fluid loss agent, preferably 2-16 parts; 0.1-3 parts of dispersant, preferably 0.1-2 parts; 0-25 parts of micro silicon, preferably 0-20 parts; 0.01-1 part of tributyl phosphate, preferably 0.05-0.5 part; 0.01-2 parts of retarder, preferably 0.01-1.5 parts; 0-50 parts of density regulator, preferably 0-40 parts; 35-120 parts of water.
According to a preferred embodiment of the present invention, the fluid loss agent comprises a terpolymer fluid loss agent and a polyvinyl alcohol fluid loss agent, and the terpolymer fluid loss agent is preferably a 2-acrylamido-2-methylpropanesulfonic acid/acrylic acid/acrylamide terpolymer fluid loss agent.
According to the preferred embodiment of the invention, the cement paste system comprises 1-8 parts of terpolymer fluid loss additive and 1-8 parts of polyvinyl alcohol fluid loss additive based on 100 parts of cement.
According to a preferred embodiment of the invention, the dispersant comprises an aldehyde ketone condensation polymer dispersant.
According to a preferred embodiment of the present invention, the density modifier comprises a high antibody glass bead density lightening agent and a density weighting agent.
According to another aspect of the present invention, there is provided a method of preparing the above cement slurry system, comprising:
s1, weighing cement, a fluid loss agent, micro-silicon, an oil well cement anti-fading agent, a dispersing agent, tributyl phosphate, a retarder and a density regulator according to the weight parts;
s2, mixing cement, micro-silicon, an oil well cement anti-fading agent and a density regulator to obtain mixed powder;
s3, mixing the fluid loss agent, the dispersing agent, tributyl phosphate, the retarder and water to obtain a mixed liquid;
and S4, adding the mixed powder into the mixed liquid, and stirring to obtain the cement paste system.
The invention has the advantages and beneficial technical effects as follows:
the anti-recession cement slurry system adopts the active silicon-aluminum oxide anti-recession agent, has the advantage of inhibiting the strength recession of oil well cement under the high temperature condition of more than 200 ℃, superfine silicon dioxide and superfine aluminum oxide in the additive can be filled among cement particles, and can also perform secondary hydration with hydration products in the cement to generate more ordered and stable calcium aluminosilicate hydration products which are needle-shaped crystal grains and can be inserted and lapped into a net structure to reduce the porosity and permeability of the cement stone, so the cement stone formed at the temperature of more than 200 ℃ still has better high-temperature mechanical property, and the cement stone has better structural stability at high temperature, thereby improving the compression strength of the oil well cement stone and having better popularization and application values.
Detailed Description
The present invention is described below with reference to specific examples, which are not intended to limit the scope of the present invention, and those skilled in the art may make insubstantial modifications and adaptations of the present invention based on the above-described disclosure.
The starting materials used in the examples are all commercially available unless otherwise specified.
Example 1
(1) Weighing 500g of oil well cement, 75g of a fading prevention agent (silicon dioxide: aluminum oxide ═ 30:45), 25g of a 2-acrylamido-2-methylpropanesulfonic acid/acrylic acid/acrylamide terpolymer fluid loss agent, 10g of a polyvinyl alcohol fluid loss agent, 2.5g of an aldehyde ketone condensation polymer dispersant, 15g of microsilica, 0.25g of tributyl phosphate, 1g of a 2-acrylamido-2-methylpropanesulfonic acid/acrylic acid binary polymer retarder and 180g of fresh water.
(2) Uniformly mixing cement, micro silicon and an anti-fading agent to obtain mixed powder;
(3) uniformly mixing a terpolymer fluid loss agent, a polyvinyl alcohol fluid loss agent, an aldehyde ketone condensation polymer dispersing agent, tributyl phosphate, a retarder and fresh water to obtain a mixed liquid;
(4) adding the mixed liquid into a mixing container, rotating a stirrer at a low speed (4000 +/-200 revolutions per minute) within 15 seconds, uniformly mixing to obtain mixed powder, covering a cover of the stirrer, continuously stirring at a high speed (12000 +/-500 revolutions per minute) for 35 seconds, and uniformly stirring to obtain the anti-recession cement paste system based on the active silicon-aluminum oxide, wherein the density of the anti-recession cement paste system is 1.89g/cm3。
Example 2
(1) Weighing 500g of oil well cement, 75g of a fading prevention agent (silicon dioxide: aluminum oxide ═ 30:45), 25g of a 2-acrylamido-2-methylpropanesulfonic acid/acrylic acid/acrylamide terpolymer fluid loss agent, 10g of a polyvinyl alcohol fluid loss agent, 2.5g of an aldehyde ketone condensation polymer dispersant, 15g of microsilica, 0.25g of tributyl phosphate, 1g of a 2-acrylamido-2-methylpropanesulfonic acid/acrylic acid biopolymer retarder, 10g of a high-antibody glass bead density lightening admixture and 180g of fresh water.
(2) Uniformly mixing cement, micro-silicon, an anti-fading agent and a high-antibody glass bead density lightening agent to obtain mixed powder;
(3) uniformly mixing a terpolymer fluid loss agent, a polyvinyl alcohol fluid loss agent, an aldehyde ketone condensation polymer dispersing agent, tributyl phosphate, a retarder and fresh water to obtain a mixed liquid;
(4) and adding the mixed liquid into a mixing container, rotating a stirrer at a low speed (4000 +/-200 revolutions per minute), adding and uniformly mixing within 15 seconds to obtain mixed powder, covering a cover of the stirrer, continuously stirring at a high speed (12000 +/-500 revolutions per minute) for 35 seconds, and uniformly stirring to obtain the recession-proof cement paste system based on the active silicon-aluminum oxide.
Example 3
(1) Weighing 500g of oil well cement, 75g of a fading prevention agent (silicon dioxide: aluminum oxide ═ 30:45), 25g of a 2-acrylamido-2-methylpropanesulfonic acid/acrylic acid/acrylamide terpolymer fluid loss agent, 10g of a polyvinyl alcohol fluid loss agent, 2.5g of an aldehyde ketone condensation polymer dispersant, 15g of microsilica, 0.25g of tributyl phosphate, 1g of a 2-acrylamido-2-methylpropanesulfonic acid/acrylic acid biopolymer retarder, 50g of a high-antibody glass bead density lightening admixture and 180g of fresh water.
(2) Uniformly mixing cement, micro-silicon, an anti-fading agent and a high-antibody glass bead density lightening agent to obtain mixed powder;
(3) uniformly mixing a terpolymer fluid loss agent, a polyvinyl alcohol fluid loss agent, an aldehyde ketone condensation polymer dispersing agent, tributyl phosphate, a retarder and fresh water to obtain a mixed liquid;
(4) and adding the mixed liquid into a mixing container, rotating a stirrer at a low speed (4000 +/-200 revolutions per minute), adding and uniformly mixing within 15 seconds to obtain mixed powder, covering a cover of the stirrer, continuously stirring at a high speed (12000 +/-500 revolutions per minute) for 35 seconds, and uniformly stirring to obtain the recession-proof cement paste system based on the active silicon-aluminum oxide.
Example 4
(1) Weighing 500g of oil well cement, 75g of a fading prevention agent (silicon dioxide: aluminum oxide ═ 30:45), 25g of a 2-acrylamido-2-methylpropanesulfonic acid/acrylic acid/acrylamide terpolymer fluid loss agent, 10g of a polyvinyl alcohol fluid loss agent, 2.5g of an aldehyde ketone condensation polymer dispersant, 15g of microsilica, 0.25g of tributyl phosphate, 1g of a 2-acrylamido-2-methylpropanesulfonic acid/acrylic acid biopolymer retarder, 10g of a high-antibody glass bead density weighting agent and 180g of fresh water.
(2) Uniformly mixing cement, micro-silicon, an anti-fading agent and a high-antibody glass bead density weighting agent to obtain mixed powder;
(3) uniformly mixing a terpolymer fluid loss agent, a polyvinyl alcohol fluid loss agent, an aldehyde ketone condensation polymer dispersing agent, tributyl phosphate, a retarder and fresh water to obtain a mixed liquid;
(4) and adding the mixed liquid into a mixing container, rotating a stirrer at a low speed (4000 +/-200 revolutions per minute), adding and uniformly mixing within 15 seconds to obtain mixed powder, covering a cover of the stirrer, continuously stirring at a high speed (12000 +/-500 revolutions per minute) for 35 seconds, and uniformly stirring to obtain the recession-proof cement paste system based on the active silicon-aluminum oxide.
Example 5
(1) Weighing 500g of oil well cement, 75g of a fading prevention agent (silicon dioxide: aluminum oxide ═ 30:45), 25g of a 2-acrylamido-2-methylpropanesulfonic acid/acrylic acid/acrylamide terpolymer fluid loss agent, 10g of a polyvinyl alcohol fluid loss agent, 2.5g of an aldehyde ketone condensation polymer dispersant, 15g of microsilica, 0.25g of tributyl phosphate, 1g of a 2-acrylamido-2-methylpropanesulfonic acid/acrylic acid biopolymer retarder, 50g of a high-antibody glass bead density weighting agent and 180g of fresh water.
(2) Uniformly mixing cement, micro-silicon, an anti-fading agent and a high-antibody glass bead density weighting agent to obtain mixed powder;
(3) uniformly mixing a terpolymer fluid loss agent, a polyvinyl alcohol fluid loss agent, an aldehyde ketone condensation polymer dispersing agent, tributyl phosphate, a retarder and fresh water to obtain a mixed liquid;
(4) and adding the mixed liquid into a mixing container, rotating a stirrer at a low speed (4000 +/-200 revolutions per minute), adding and uniformly mixing within 15 seconds to obtain mixed powder, covering a cover of the stirrer, continuously stirring at a high speed (12000 +/-500 revolutions per minute) for 35 seconds, and uniformly stirring to obtain the recession-proof cement paste system based on the active silicon-aluminum oxide.
Example 6
(1) Weighing 500g of oil well cement, 75g of a fading prevention agent (silicon dioxide: aluminum oxide ═ 30:45), 25g of a 2-acrylamido-2-methylpropanesulfonic acid/acrylic acid/acrylamide terpolymer fluid loss agent, 10g of a polyvinyl alcohol fluid loss agent, 2.5g of an aldehyde ketone condensation polymer dispersant, 15g of microsilica, 0.25g of tributyl phosphate, 1g of a 2-acrylamido-2-methylpropanesulfonic acid/acrylic acid binary polymer retarder and 200g of fresh water.
(2) Uniformly mixing cement, micro silicon and an anti-fading agent to obtain mixed powder;
(3) uniformly mixing a terpolymer fluid loss agent, a polyvinyl alcohol fluid loss agent, an aldehyde ketone condensation polymer dispersing agent, tributyl phosphate, a retarder and fresh water to obtain a mixed liquid;
(4) and adding the mixed liquid into a mixing container, rotating a stirrer at a low speed (4000 +/-200 revolutions per minute), adding and uniformly mixing within 15 seconds to obtain mixed powder, covering a cover of the stirrer, continuously stirring at a high speed (12000 +/-500 revolutions per minute) for 35 seconds, and uniformly stirring to obtain the recession-proof cement paste system based on the active silicon-aluminum oxide.
Alternatively, 0-40 parts of high-antibody glass bead density lightening agent can be added into the mixed powder;
alternatively, 0-40 parts of high-antibody glass bead density weighting agent can be added into the mixed powder;
alternatively, the consumption of fresh water can be changed to 35-120 parts;
the density of the obtained product after the replacement is 1.2-2.80 g/cm3The anti-fading cement paste system based on the active silicon-aluminum oxide.
Any numerical value mentioned in this specification, if there is only a two unit interval between any lowest value and any highest value, includes all values from the lowest value to the highest value incremented by one unit at a time. For example, if it is stated that the amount of a component, or a value of a process variable such as temperature, pressure, time, etc., is 50 to 90, it is meant in this specification that values of 51 to 89, 52 to 88 … …, and 69 to 71, and 70 to 71, etc., are specifically enumerated. For non-integer values, units of 0.1, 0.01, 0.001, or 0.0001 may be considered as appropriate. These are only some specifically named examples. In a similar manner, all possible combinations of numerical values between the lowest value and the highest value enumerated are to be considered to be disclosed in this application.
It should be noted that the above-mentioned embodiments are only for explaining the present invention, and do not constitute any limitation to the present invention. The present invention has been described with reference to exemplary embodiments, but the words which have been used herein are words of description and illustration, rather than words of limitation. The invention can be modified, as prescribed, within the scope of the claims and without departing from the scope and spirit of the invention. Although the invention has been described herein with reference to particular means, materials and embodiments, the invention is not intended to be limited to the particulars disclosed herein, but rather extends to all other methods and applications having the same functionality.
Claims (10)
1. An anti-fade cement slurry system comprising an oil well cement anti-fade agent comprising the following components:
component (1), silicon dioxide, 30-60 parts;
40-70 parts of component (2), aluminum oxide.
2. Grout system according to claim 1, wherein said silica has a particle size in the range of 0.1-0.25 μm.
3. The cement slurry system according to claim 1 or 2, wherein the alumina has a particle size in the range of 40-7-nm.
4. A cement slurry system according to any of claims 1 to 3, wherein the oil well cement recession preventing agent is prepared by mixing component (1) and component (2).
5. The cement slurry system according to any one of claims 1 to 4, wherein the oil well cement recession preventing agent is prepared by a method comprising the steps of:
(1) respectively activating the component (1) and the component (2);
(2) mixing the activated component (1) and the activated component (2) to obtain the final product.
6. Cement paste system according to any of claims 1 to 5, characterized in that activation is carried out by high temperature calcination of the component (1); the calcining temperature is 800-1200 ℃, and preferably 900-1000 ℃; the calcination time is 10-18h, preferably 12-16 h.
7. Cement paste system according to any of claims 1 to 6, characterized in that activation is carried out by high temperature calcination of the component (2); the calcining temperature is 400-900 ℃, preferably 500-800 ℃; the calcination time is 6-16h, preferably 8-12 h.
8. A cement slurry system according to any of claims 1 to 7, wherein the oil well cement recession preventing agent is present in an amount of 20 to 40 parts, preferably 20 to 30 parts, based on 100 parts cement.
9. The cement slurry system according to any one of claims 1 to 8, further comprising the following components in parts by weight, based on 100 parts by weight of cement: 1-20 parts of fluid loss agent, preferably 2-16 parts; 0.1-3 parts of dispersant, preferably 0.1-2 parts; 0-25 parts of micro silicon, preferably 0-20 parts; 0.01-1 part of tributyl phosphate, preferably 0.05-0.5 part; 0.01-2 parts of retarder, preferably 0.01-1.5 parts; 0-50 parts of density regulator, preferably 0-40 parts; 35-120 parts of water.
10. Method of preparing a cement slurry system according to any of claims 1-9, comprising:
s1, weighing cement, a fluid loss agent, micro-silicon, an oil well cement anti-fading agent, a dispersing agent, tributyl phosphate, a retarder and a density regulator according to parts by weight;
s2, mixing cement, micro-silicon, an oil well cement anti-fading agent and a density regulator to obtain mixed powder;
s3, mixing the fluid loss agent, the dispersing agent, tributyl phosphate, the retarder and water to obtain a mixed liquid;
and S4, adding the mixed powder into the mixed liquid, and stirring to obtain the cement paste system.
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