CN113213822A - Ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry and application thereof - Google Patents
Ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry and application thereof Download PDFInfo
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- 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
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- 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
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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention discloses ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry and application thereof. The ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry comprises the following components in parts by mass: 100 parts of G-grade cement; 4-6 parts of a fluid loss agent; 3-5 parts of latex; 2-6 parts of a channeling-preventing agent; 1-3 parts of a dispersing agent; 35-50 parts of silicon powder; 2-5 parts of a preservative; 0.5-2 parts of a reinforcing agent; 0.5-6 parts of retarder; 0-400 parts of weighting agent; 30-100 parts of water; 1-2 parts of a defoaming agent. The ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry disclosed by the invention adopts specific-content components, the components can well interact with each other, the temperature resistance of the cement slurry can reach 230 ℃, the cement slurry has lower high-temperature high-pressure water loss and faster thickening conversion time, excellent channeling resistance is shown, the solidified set cement has higher compressive strength and lower permeability, the corrosion of acid gases such as carbon dioxide and hydrogen sulfide can be effectively resisted, and the sealing operation of a reservoir stratum section which is ultrahigh-temperature and is rich in carbon dioxide and hydrogen sulfide acid gases can be met.
Description
Technical Field
The invention relates to ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry and application thereof, belonging to the technical field of well cementation.
Background
Rich in CO at high temperature (temperature higher than 150 deg.C)2And H2S gas reservoir for cementing operation, CO existing in stratum2And H2S gas easily forms acid liquor in a humid environment, and the acid liquor is easy to corrode and react with alkaline set cement. The corrosion of acid gas directly affects the microstructure, porosity and flexural and compressive strength of the cement stone. Severe corrosion, almost without any traces of adhering cement stones to the outer wall of the casing. It has been demonstrated that set cements formulated with slurries having API strength and permeability suffer from CO enrichment within months2The fluid acts, so that serious erosion damage is generated; CO 22The cement is corroded and carbonized to the extent except CO2Besides the correlation between the performance of the medium itself and its partial pressure and relative humidity, the properties of the set cement itself are also closely related. The phenomenon that the strength of the set cement is weakened and even the overall damage of a cement sheath can be caused under the action of a long time. If CO is present2Or H2The acid liquor formed by the S gas continuously permeates and migrates to the cement in the well, the corrosion damage is continued, and the underground pipe column is also quickly corroded and damaged. The cement ring column is the key for preventing stratum fluid from corroding the casing and protecting the stability of the well wall, and the lead corrosion of the cement ring column is related to the safety of the well body of the oil-gas well. Therefore, the existence of the corrosion problem of the cement stone can not only seriously reduce the oil deposit yield of the oil and gas well, but also even seriously reduce the oil deposit yield of the oil and gas wellCompromising the life of the entire well. Subsequent exploration and development will be affected if the corrosion problem cannot be solved effectively. Prevention of CO2Or H2The corrosion problem of S to cement is a difficult problem which is urgently needed to be solved by the petroleum and gas industry, and along with the exploration and development of oil and gas resources in a more complex environment, the requirements of well cementation operation are undoubtedly pushed to be higher along with the corrosion of acid gas at high pressure and ultrahigh temperature.
Disclosure of Invention
The invention aims to provide ultrahigh-temperature corrosion-resistant anti-channeling cement paste and application thereof, wherein the cement paste has high temperature resistance, corrosion resistance and good anti-channeling performance, and can meet the sealing operation requirements of a high-temperature and high-pressure gas reservoir rich in carbon dioxide/hydrogen sulfide at the temperature of more than 200 ℃ so as to guarantee the long-term service life of the gas well.
The ultrahigh-temperature corrosion-resistant anti-channeling cement slurry provided by the invention comprises the following components in parts by mass:
100 parts of G-grade cement;
4-6 parts of a fluid loss agent;
3-5 parts of latex;
2-6 parts of a channeling-preventing agent;
1-3 parts of a dispersing agent;
35-50 parts of silicon powder;
2-5 parts of a preservative;
0.5-2 parts of a reinforcing agent;
0.5-6 parts of retarder;
0-400 parts of weighting agent;
30-100 parts of water;
1-2 parts of a defoaming agent.
The high-temperature corrosion-resistant anti-channeling cement slurry is specifically composed of any one of the following components 1) to 5):
1) 100 parts of G-grade cement; 4-6 parts of a fluid loss agent; 3-5 parts of latex; 2.7-4 parts of a channeling-preventing agent; 1-3 parts of a dispersing agent; 35-50 parts of silicon powder; 4-5 parts of a preservative; 1 part of a reinforcing agent; 1.5-2.7 parts of retarder; 65-168 parts of weighting agent and 42-55.5 parts of water;
2) 100 parts of G-grade cement; 4 parts of fluid loss agent; 3 parts of latex; 2.7 parts of a channeling-preventing agent; 1 part of a dispersant; 35 parts of silicon powder; 5 parts of a preservative; 1 part of a reinforcing agent; 1.5 parts of retarder; 42 parts of water;
3) 100 parts of G-grade cement; 6 parts of a fluid loss agent; 4 parts of latex; 4 parts of a channeling-preventing agent; 2.1 parts of a dispersing agent; 50 parts of silicon powder; 4 parts of a preservative; 1 part of a reinforcing agent; 2.1 parts of retarder; a weighting agent 65; 51 parts of water;
4) 100 parts of G-grade cement; 6 parts of a fluid loss agent; 4 parts of latex; 4 parts of a channeling-preventing agent; 2.5 parts of a dispersing agent; 50 parts of silicon powder; 4 parts of a preservative; 1 part of a reinforcing agent; 2.7 parts of a retarder; a weighting agent 108; 52.5 parts of water;
5) 100 parts of G-grade cement; 6 parts of a fluid loss agent; 5 parts of latex; 4 parts of a channeling-preventing agent; 3 parts of a dispersing agent; 50 parts of silicon powder; 4 parts of a preservative; 1 part of a reinforcing agent; 2.7 parts of a retarder; weighting agent 168; 55.5 parts of water.
In the ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry, the fluid loss reducer can be an AMPS (2-acrylamide-2-methylpropanesulfonic acid) ternary or quaternary polymer, preferably a fluid loss reducer obtained by copolymerizing AMPS, AA (acrylic acid), MA (methacrylic acid) and N, N-dimethylacrylamide, such as the fluid loss reducer FLO-L.
In the ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry, the latex can be styrene-butadiene latex, and the solid content is 45-50%.
In the ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry, the channeling-preventing agent can be a polyethyleneimine polymer, has a molecular weight of 20-100 ten thousand, can be well dispersed in the cement slurry, and can form an impermeable film between the cement slurry and a stratum in the presence of pressure difference after synergistic action with a fluid loss additive and latex, so that on one hand, water loss can be remarkably reduced, on the other hand, the impermeable film can effectively prevent acidic fluid from directly contacting with set cement to corrode, and in addition, the polyethyleneimine has a carbon dioxide adsorption function, so that carbon dioxide can be adsorbed on the surface of the set cement to avoid corroding the deep set cement;
in the ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry, the dispersant can be at least one of a polycarboxylate dispersant, a naphthalenesulfonic acid polycondensation dispersant and a formaldehyde acetone condensation dispersant;
preferably, the mixture of the polycarboxylate dispersant and the formaldehyde acetone polycondensation dispersant can obviously reduce the water demand of the cement paste after being added into the high-density cement paste, improve the compactness of the set cement and reduce the corrosion risk.
In the ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry, the silicon powder can be a mixture of silicon powder with the granularity of 800 meshes and silicon powder with the granularity of 160 meshes, and the mass ratio of the silicon powder to the silicon powder is 1: 2-2.5, the silica powder can be used for obtaining cement paste with good rheological property, and the curing strength decay rate at 200 ℃ is low.
In the ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry, the preservative can be hydroxyapatite powder, the residual content of the hydroxyapatite powder is less than 5 percent through a 300-mesh sieve, the concentration of calcium hydroxide on the surface of the set cement can be obviously reduced, and the permeability of the set cement is obviously reduced, which is important for the corrosion resistance of the set cement.
In the ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry, the reinforcing agent can be a nano alumina solution, the D90 particle size is smaller than 0.4 micron, and the reinforcing agent has the main effect of ensuring that the cement stone at the upper low-temperature section can form strength in a short time under the condition of high temperature difference and ensuring the sealing effect of a cement sheath.
In the ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry, the retarder can be a mixture of hydroxypolycarboxylic acid retarder and organic phosphate retarder or/and a mixture of AMPS polymer retarder and organic phosphate retarder;
preferably, the mixture of the AMPS polymer retarder and the organic phosphate retarder is selected, and the mass ratio of the AMPS polymer retarder to the organic phosphate retarder can be 3: 1.
in the ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry, the weighting agent can be at least one of barite, iron ore powder and micro manganese powder;
preferably a mixture of micro manganese powder and iron ore powder;
the iron ore powder is hematite powder or magnetite powder.
In the ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry, the defoaming agent can be at least one of a polyether defoaming agent, an organic silicon defoaming agent and a silicon ether co-clustering defoaming agent.
The ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry disclosed by the invention adopts specific-content components, the components can well interact with each other, the temperature resistance of the cement slurry can reach 230 ℃, the cement slurry has lower high-temperature high-pressure water loss and faster thickening conversion time, excellent channeling resistance is shown, the solidified set cement has higher compressive strength and lower permeability, the corrosion of acid gases such as carbon dioxide and hydrogen sulfide can be effectively resisted, and the sealing operation of a reservoir stratum section which is ultrahigh-temperature and is rich in carbon dioxide and hydrogen sulfide acid gases can be met.
Detailed Description
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The silicone-based dispersant used in the examples below, X66L, was obtained from Jianghan Petroleum technologies, Inc., Hubei; the formaldehydeacetonide condensation dispersant CF44L was purchased from Jianghan oil technology GmbH, Hubei; the water reducing agent FLO-L is purchased from Petroleum technology GmbH of Jianghan, Hubei; AMPS polymer retarder H63L is purchased from Petroleum technology GmbH in Jianghan, North Hubei; the organic phosphate retarder H21L was purchased from Jiahua science and technology, Inc., Jingzhou.
The ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry system disclosed by the invention comprises the following components in parts by mass: 100 parts of G-grade cement; 4-6 parts of a fluid loss agent; 3-5 parts of latex; 2-6 parts of a channeling-preventing agent; 1-3 parts of a dispersing agent; 35-50 parts of silicon powder; 2-5 parts of a preservative; 0.5-2 parts of a reinforcing agent; 0.5-6 parts of retarder; 0-400 parts of weighting agent; 30-100 parts of water; 1-2 parts of a defoaming agent.
The ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry provided by the invention adopts components with specific content, the components can better interact with each other, the temperature resistance of the cement slurry can reach 230 ℃, the cement slurry has lower high-temperature high-pressure water loss and faster thickening conversion time, excellent channeling resistance is shown, the solidified set cement has higher compressive strength and lower permeability, the corrosion of acid gases such as carbon dioxide, hydrogen sulfide and the like can be effectively resisted, and the sealing operation of a reservoir stratum section which is ultrahigh-temperature and is rich in carbon dioxide and hydrogen sulfide acid gases can be met.
Example 1 ultra-high temperature Corrosion-resistant channeling-preventing Cement slurry
100 parts by mass of G-grade oil well cement, 35 parts by mass of silicon powder, 1 part by mass of reinforcing agent, 42 parts by mass of fresh water, 1 part by mass of defoaming agent, 1 part by mass of dispersing agent, 4 parts by mass of fluid loss additive, 5 parts by mass of preservative, 2.7 parts by mass of channeling-preventing agent, 3 parts by mass of latex and 1.5 parts by mass of retarder are mixed to obtain cement paste with the density of 1.90G/cm3。
The components in this example are as follows:
the silicon powder is prepared from the following raw materials in a mass ratio of 1: 2, a mixture of 800 mesh silicon powder and 160 mesh silicon powder; the reinforcing agent is a nano alumina solution, and the D90 particle size is 0.35 micron; the defoaming agent is organosilicon dispersant X66L; the dispersant is a formaldehyde acetone condensation dispersant CF 44L; the fluid loss agent is water loss agent FLO-L; the preservative is hydroxyapatite powder, and the residual content of the preservative is less than 5 percent after the preservative is sieved by a 300-mesh sieve; the channeling-preventing agent is a polyethyleneimine polymer, and the molecular weight of the channeling-preventing agent is 50-100 ten thousand; the latex is styrene-butadiene latex with solid content of 48 percent; the retarder is a mixture of AMPS polymer retarder H63L and organic phosphate retarder H21L, and the mixing ratio is 3: 1.
Example 2 ultra-high temperature Corrosion-resistant channeling-preventing Cement slurry
100 parts by mass of G-grade oil well cement, 50 parts by mass of silicon powder, 65 parts by mass of weighting agent, 1 part by mass of reinforcing agent, 51 parts by mass of fresh water, 1 part by mass of defoaming agent, 2.1 parts by mass of dispersing agent, 6 parts by mass of fluid loss additive, 5 parts by mass of preservative, 4 parts by mass of channeling inhibitor, 4 parts by mass of latex and 2.1 parts by mass of retarder are mixed to obtain cement slurry with the density of 2.10G/cm3。
The components in this example are as follows:
the silicon powder is prepared from the following raw materials in a mass ratio of 1: 2.5 mixture of 800 mesh silicon powder and 160 mesh silicon powder; the reinforcing agent is a nano alumina solution, and the D90 particle size is 0.35 micron; the defoaming agent is organosilicon dispersant X66L; the dispersant is a formaldehyde acetone condensation dispersant CF 44L; the fluid loss agent is water loss agent FLO-L; the preservative is hydroxyapatite powder, and the residual content of the preservative is less than 5 percent after the preservative is sieved by a 300-mesh sieve; the channeling-preventing agent is a polyethyleneimine polymer, and the molecular weight of the channeling-preventing agent is 50-100 ten thousand; the latex is styrene-butadiene latex with solid content of 48 percent; the retarder is a mixture of AMPS polymer retarder H63L and organic phosphate retarder H21L, and the mixing ratio is 3: 1.
Example 3 ultra-high temperature Corrosion-resistant channeling-preventing Cement slurry
100 parts by mass of G-grade oil well cement, 50 parts by mass of silicon powder, 108 parts by mass of weighting agent, 1 part by mass of reinforcing agent, 52.5 parts by mass of fresh water, 1 part by mass of defoaming agent, 2.5 parts by mass of dispersing agent, 6 parts by mass of fluid loss additive, 5 parts by mass of preservative, 4 parts by mass of channeling-preventing agent, 5 parts by mass of latex and 2.7 parts by mass of retarder are mixed to obtain cement slurry with the density of 2.30G/cm3。
The components in this example are as follows:
the silicon powder is prepared from the following raw materials in a mass ratio of 1: 2.5 mixture of 800 mesh silicon powder and 160 mesh silicon powder; the reinforcing agent is a nano alumina solution, and the D90 particle size is 0.35 micron; the defoaming agent is organosilicon defoaming agent X66L; the dispersant is a formaldehyde acetone condensation dispersant CF 44L; the fluid loss agent is water loss agent FLO-L; the preservative is hydroxyapatite powder, and the residual content of the preservative is less than 5 percent after the preservative is sieved by a 300-mesh sieve; the channeling-preventing agent is a polyethyleneimine polymer, and the molecular weight of the channeling-preventing agent is 50-100 ten thousand; the latex is styrene-butadiene latex with solid content of 48 percent; the retarder is a mixture of AMPS polymer retarder H63L and organic phosphate retarder H21L, and the mixing ratio is 3: 1.
Example 4 ultra-high temperature Corrosion-resistant channeling-preventing Cement slurry
100 parts by mass of G-grade oil well cement, 50 parts by mass of silicon powder, 168 parts by mass of weighting agent, 1 part by mass of reinforcing agent, 55.5 parts by mass of fresh water, 1 part by mass of defoaming agent, 3 parts by mass of dispersing agent, 6 parts by mass of fluid loss additive, 5 parts by mass of preservative, 4 parts by mass of anti-channeling agent, 5 parts by mass of latex and 2.7 parts by mass of retarder are mixed to obtain cement slurry with the density of 2.40G/cm3。
The components in this example are as follows:
the silicon powder is prepared from the following raw materials in a mass ratio of 1: 2, a mixture of 800 mesh silicon powder and 160 mesh silicon powder; the reinforcing agent is a nano alumina solution, and the D90 particle size is 0.35 micron; the defoaming agent is organosilicon X66L; the dispersant is a formaldehyde acetone condensation dispersant CF 44L; the fluid loss agent is water loss agent FLO-L; the preservative is hydroxyapatite powder, and the residual content of the preservative is less than 5 percent after the preservative is sieved by a 300-mesh sieve; the channeling-preventing agent is a polyethyleneimine polymer, and the molecular weight of the channeling-preventing agent is 50-100 ten thousand; the latex is styrene-butadiene latex with solid content of 48 percent; the retarder is a mixture of AMPS polymer retarder H63L and organic phosphate retarder H21L, and the mixing ratio is 3: 1.
The physical properties of the hydrogels prepared in examples 1-4 of the present invention are shown in Table 1.
As can be seen from the data in the table 1, the ultrahigh-temperature corrosion-resistant gas channeling-preventing cement slurry has good high-temperature resistance in different density formulas, the thickening time of the cement slurry under the condition of 200 ℃/115MPa can be effectively controlled, and in addition, the compression strength and the channeling-preventing performance of the set cement can be better controlled. Therefore, the formula of each density cement paste of the ultrahigh-temperature corrosion-resistant gas channeling prevention cement paste system has good channeling prevention and high temperature resistance.
TABLE 1 evaluation of physical Properties of Cement slurries
The evaluation of the corrosion depth performance of the cement paste (formulation No. 3) prepared in example 1 of the present invention and the cement paste of the relevant formulation is shown in Table 2, and the density of each cement paste is 1.90g/cm3Wherein, with respect to the formulation of the cement paste of example 1, the cement paste No. 1 does not include a preservative, the content of the preservative in the cement paste No. 2 is 2.5%, and the cement paste No. 4 does not include latex.
As can be seen from the data of Table 2, for 1.90g/cm3The cement paste formula with the density and the formula No. 3 have relatively best anti-corrosion effect, and are relatively 1.90g/cm3Density ofThe cement slurry formula can achieve better corrosion prevention effect by combining 5% of preservative, 2.7% of channeling prevention agent and 3% of latex additive.
TABLE 2 Cement paste formulation (1.90 Density) and depth of Cement Corrosion
Remarking: the corrosion time is 150 days, the curing temperature is 200 ℃, the carbon dioxide partial pressure is 12MPa, and the hydrogen sulfide partial pressure is 21 ppm.
The corrosion resistance of the grout prepared in example 1 of the present invention is shown in table 3.
As can be seen from the data in Table 3, for 1.90g/cm3The density ultrahigh-temperature corrosion-resistant cement paste system has excellent corrosion resistance, the corrosion depth of the set cement within 150 days can be controlled within 0.65mm, and the corrosion depth of the common set cement under the same condition is 2.2 mm. Therefore, the cement stone provided by the invention has a good corrosion resistance effect.
TABLE 3 set Cement (1.90 g/cm)3) Corrosion time and corrosion resistance of
Remarking: the curing temperature was 200 ℃, the carbon dioxide partial pressure was 12MPa, and the hydrogen sulfide partial pressure was 21 ppm.
Claims (10)
1. The ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry comprises the following components in parts by mass:
100 parts of G-grade cement;
4-6 parts of a fluid loss agent;
3-5 parts of latex;
2-6 parts of a channeling-preventing agent;
1-3 parts of a dispersing agent;
35-50 parts of silicon powder;
2-5 parts of a preservative;
0.5-2 parts of a reinforcing agent;
0.5-6 parts of retarder;
0-400 parts of weighting agent;
30-100 parts of water;
1-2 parts of a defoaming agent.
2. The ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry as claimed in claim 1, wherein: the fluid loss agent is AMPS ternary or quaternary polymer;
the latex is styrene-butadiene latex, and the solid content is 45-50%.
3. The ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry as claimed in claim 1 or 2, wherein: the channeling-preventing agent is a polyethyleneimine polymer and has a molecular weight of 20-100 ten thousand.
4. The ultra-high temperature corrosion-resistant channeling-preventing cement slurry according to any one of claims 1-3, wherein: the dispersant is at least one of a polycarboxylate dispersant, a naphthalenesulfonic acid polycondensation dispersant and a formaldehyde acetone polycondensation dispersant.
5. The ultra-high temperature corrosion-resistant channeling-preventing cement slurry according to any one of claims 1-4, wherein: the silicon powder is a mixture of silicon powder with the granularity of 800 meshes and silicon powder with the granularity of 160 meshes.
6. The ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry according to any one of claims 1 to 5, wherein: the preservative is hydroxyapatite powder, and the residue of a 300-mesh sieve is less than 5%.
7. The ultra-high temperature corrosion-resistant channeling-preventing cement slurry according to any one of claims 1-6, wherein: the reinforcing agent is a nano aluminum oxide solution, and the D90 particle size of the reinforcing agent is less than 0.4 micron;
the retarder is a mixture of hydroxypolycarboxylic acid retarder and organic phosphate retarder or/and a mixture of AMPS polymer retarder and organic phosphate retarder.
8. The ultra-high temperature corrosion-resistant channeling-preventing cement slurry according to any one of claims 1-7, wherein: the weighting agent is at least one of barite, iron ore powder and micro manganese powder;
the iron ore powder is hematite powder or magnetite powder.
9. The ultra-high temperature corrosion-resistant channeling-preventing cement slurry according to any one of claims 1-8, wherein: the defoaming agent is at least one of polyether defoaming agent, organic silicon defoaming agent and silicon ether co-clustering defoaming agent.
10. Use of the ultra-high temperature corrosion-resistant channeling-preventing cement slurry as defined in any one of claims 1 to 9 in a cementing operation of a high temperature carbon dioxide/hydrogen sulfide rich gas reservoir.
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| CN114426415A (en) * | 2022-01-18 | 2022-05-03 | 中国石油化工股份有限公司 | High-density anti-channeling tough cement slurry system for shale gas-solid well and preparation method and application thereof |
| CN114516737A (en) * | 2022-03-25 | 2022-05-20 | 西南石油大学 | Water-invasion-resistant cement slurry for cementing water-bearing stratum and preparation method thereof |
| CN115572114A (en) * | 2022-10-28 | 2023-01-06 | 中国石油天然气集团有限公司 | Corrosion-resistant cement slurry system for well cementation of hydrogen sulfide-containing gas reservoir and preparation method thereof |
| CN115650663A (en) * | 2022-10-18 | 2023-01-31 | 北京交通大学 | Preparation method of ultrahigh-performance concrete with carbon dioxide as internal curing agent |
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| CN114426415A (en) * | 2022-01-18 | 2022-05-03 | 中国石油化工股份有限公司 | High-density anti-channeling tough cement slurry system for shale gas-solid well and preparation method and application thereof |
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| CN114516737A (en) * | 2022-03-25 | 2022-05-20 | 西南石油大学 | Water-invasion-resistant cement slurry for cementing water-bearing stratum and preparation method thereof |
| CN115650663A (en) * | 2022-10-18 | 2023-01-31 | 北京交通大学 | Preparation method of ultrahigh-performance concrete with carbon dioxide as internal curing agent |
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