CN111072328B - Oil well micro-crack self-healing material and preparation method thereof - Google Patents
Oil well micro-crack self-healing material and preparation method thereof Download PDFInfo
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- CN111072328B CN111072328B CN201911392000.XA CN201911392000A CN111072328B CN 111072328 B CN111072328 B CN 111072328B CN 201911392000 A CN201911392000 A CN 201911392000A CN 111072328 B CN111072328 B CN 111072328B
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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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- 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
- C09K8/487—Fluid loss control additives; Additives for reducing or preventing circulation loss
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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
- 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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
Abstract
The self-healing material for the micro-cracks of the oil well comprises the following components: cement, nano silicon dioxide, sodium silicate, magnesium oxide, fumaric acid, a dispersing agent, a fluid loss agent and water. The preparation method of the self-healing material comprises the following steps: firstly, dividing water into two parts of water with equal mass; then dissolving the nano silicon dioxide into one part of water; dissolving sodium silicate, magnesium oxide and fumaric acid into another part of water; then, mixing the dispersant, the fluid loss agent and the cement, and stirring the mixture uniformly; finally, mixing and uniformly stirring the two obtained aqueous solutions; mixing with cement mixture to obtain cement slurry containing self-healing composite material. The self-healing composite material prepared by the invention has the advantages of simple preparation method, simple operation and cheap raw materials; the cement micro-crack self-repairing agent has self-repairing capability to a certain degree when formation water invades into the oil well cement micro-cracks, and can ensure the safe production of an oil well.
Description
Technical Field
The present invention relates to petroleum well drilling and cementing technology, and is especially one kind of micro crack self-healing material for oil well and its preparation process.
Background
The well cementation project is a key link for connecting drilling operation and oil and gas resource exploitation, and the program comprises the steps of putting a casing pipe with a certain specification underground, and injecting cement slurry into an annular pump between the casing pipe and a well wall after the casing pipe is put. The injected cement paste, a hydraulic binder, sets and hardens into a cement sheath within a certain time. The cement sheath has the functions of supporting the casing and preventing formation fluid from corroding and sealing complex formations such as a leakage layer, a collapse layer and the like and oil-gas water layer, and lays a foundation for realizing resource layered development. A good quality cement sheath should maintain long term seal integrity, which is critical to the production life of the oil and gas well and directly impacts later oil and gas production. However, due to the volume shrinkage and brittleness of cement materials, the influence of large-scale changes of temperature and pressure in the fracturing stimulation process and the influence of stratum peristalsis, many oil and gas wells have the problem of cement sheath microcracks at present. The traditional main method for repairing the cement microcracks is secondary cement squeezing operation, but the operation risk is high and the cost is high. Since the position of the generated microcracks is difficult to determine, the self-healing technology is a powerful measure for solving the microcracks of the set cement.
Patent CN108383411A discloses a microcapsule for cement-based microcrack self-repair and a preparation method thereof. The microcapsule is formed by coating a capsule core with a capsule wall, wherein the capsule core is mainly a repairing agent which is one or more of sodium metaaluminate, sodium silicate and calcium nitrate; the material of the capsule wall is urea-formaldehyde resin; the preparation method comprises the steps of reacting formaldehyde solution and urea at 50-70 ℃ and pH8-9 by using an in-situ polymerization method to generate a prepolymer; cooling the prepolymer to room temperature, adding a repairing agent, an emulsifier and an auxiliary agent, stirring at 50-70 ℃ for 0.5-1.5h, acidifying the system pH to 2-4, and reacting; heating to 50-70 deg.C, keeping the temperature for 1-3h, cooling, filtering, washing with distilled water, and oven drying. The patent CN108892407A discloses a double-shell epoxy resin microcapsule self-repairing material and a preparation method thereof, wherein the microcapsule self-repairing material adopts epoxy resin as a repairing agent core material, and firstly, melamine urea formaldehyde resin is prepared by an in-situ polymerization method as an inner wall materialThe single-shell microcapsule self-repairing material is prepared by using a sol-gel method and using inorganic SiO2The polymer is a double-shell microcapsule self-repairing material with an outer wall material. Patent CN108483976A discloses a thermoplastic resin-coated waterborne epoxy resin type cement concrete crack self-repairing microcapsule and a preparation method thereof. The microcapsule consists of a water-based epoxy resin microcapsule and a curing agent microcapsule, wherein the water-based epoxy resin microcapsule comprises the following components in parts by weight: 30-55 parts of paraffin, 5-10 parts of petroleum resin and 35-65 parts of waterborne epoxy resin, wherein the curing agent microcapsule comprises the following components in parts by weight: 35-60 parts of paraffin, 5-10 parts of petroleum resin and 30-60 parts of curing agent.
Although the above patent can repair micro cracks to some extent when the cement cracks, the microcapsules have limited shell wall strength, so that the microcapsules are easily broken due to high shear force during the slurry mixing process, the consistency of the cement slurry is easily increased, the rheological property of the cement slurry is poor, and the cement slurry is not easy to pump. When too many microcapsules are incorporated into the cement, they may also have an effect on the mechanical properties of the cement. The preparation of the microcapsule is relatively difficult and is not beneficial to industrial production. And because the wall material of the microcapsule adopts the organic high molecular polymer, the wall material has the possibility of aging. Once the wall materials of the set cement are aged in the normal service process, the core materials are separated out, so that the repairing agent is cured in advance, and the microcapsules lose the effect when the set cement generates micro cracks.
Disclosure of Invention
Aiming at the problems of the micro-crack repairing method, the application provides an oil well micro-crack self-healing material and a preparation method thereof. The self-healing composite material prepared by the invention does not influence the rheological property of cement paste, is easy to obtain, is simple to prepare and is easy for industrial production.
The application provides an oil well microcrack self-healing material, the raw materials of self-healing material contain cement, nanometer silica, sodium silicate, magnesium oxide, fumaric acid, dispersant, fluid loss additive and water. Optionally, the oil well microfracture self-healing material consists of the above components.
In the oil well microfracture self-healing material provided by the invention, the water is used in an amount of 40-50 wt% of the weight of cement, the nano-silica is used in an amount of 0.5-1.5 wt% of the weight of cement, the sodium silicate is used in an amount of 1-3 wt% of the weight of cement, the magnesium oxide is used in an amount of 0.2-1 wt% of the weight of cement, the fumaric acid is used in an amount of 0.3-1.5 wt% of the weight of cement, the dispersant is used in an amount of 0.2-0.6 wt% of the weight of cement, and the fluid loss additive is used in an amount of 0.8-2 wt% of the weight of cement.
In the oil well microcrack self-healing material provided by the invention, the dispersant is selected from one or more of sodium lignosulfonate, sodium polystyrene sulfonate and sodium polynaphthalene sulfonate.
In the oil well microcrack self-healing material provided by the invention, the fluid loss additive is selected from one or more of carboxymethyl hydroxyethyl cellulose, polyvinyl alcohol and polycarboxylic acid water reducing agent.
In the oil well micro-crack self-healing material provided by the invention, the particle size of the nano silicon dioxide is 20nm-100 nm.
In the oil well micro-crack self-healing material provided by the invention, the molar content of sodium oxide in the sodium silicate is 19.3% -22.8%.
In the oil well micro-crack self-healing material provided by the invention, the fumaric acid does not contain crystal water, and the purity is more than 99%.
In the self-healing composite material for oil well cement provided by the invention, the content of magnesium oxide is more than 85%, the calcining temperature is 1100-1300 ℃, and the reaction time is 200-300 s.
In the oil well microcrack self-healing material provided by the invention, the cement is G-grade oil well cement, preferably G-grade high-sulfur-resistant oil well cement.
On the other hand, the invention provides a preparation method of the oil well micro-crack self-healing material, which comprises the following steps:
(1) dividing water into two parts of water with equal mass;
(2) dissolving nano silicon dioxide into one part of water;
(3) dissolving sodium silicate, magnesium oxide and fumaric acid into another part of water;
(4) mixing the dispersant, the fluid loss agent and the cement, and stirring the mixture uniformly;
(5) mixing the two parts of water solution obtained in the step (2) and the step (3) and uniformly stirring; and (4) mixing the obtained mixture with the cement mixture to obtain the oil well micro-crack self-healing material.
Optionally, the preparation method of the oil well micro-crack self-healing material consists of the steps.
In the present invention, the "self-healing" is defined as: when the cementing cement sheath is subjected to packing failure, namely micro cracks are generated, the micro cracks can be quickly healed.
In the preparation method of the self-healing composite material for the oil well cement, the mixing process refers to the oil well cement test method GBT 19139-2003.
The invention mainly has the following effects:
1. the well cementation cement slurry containing the self-healing composite material prepared by the invention can meet various performance requirements of well cementation engineering on the cement slurry.
2. The prepared self-healing composite material can generate good particle gradation with cement particles, and does not influence the performance of cement paste.
3. The self-healing composite material prepared by the invention can effectively solve the problem of water channeling and has important significance for ensuring the sealing performance of the cement sheath.
4. The self-healing composite material prepared by the invention can avoid secondary cementing risk, can repair micro cracks automatically, effectively prevent fluid channeling and improve the integrity of a cement sheath.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.
Drawings
The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.
FIG. 1 is a graph of a fracture of a G-scale high sulfur-resistant oil well cement (control), wherein the left graph is an initial fracture graph; the right picture is a crack picture after curing in a water bath at 80 ℃ and 20MPa for 28 d.
FIG. 2 is a crack diagram of the microcrack self-healing material of example 1, wherein the left diagram is an initial crack diagram; the right picture is a crack picture after curing in a water bath at 80 ℃ and 20MPa for 28 d.
Detailed Description
Hereinafter, embodiments of the present application will be described in detail to make objects, technical solutions and advantages of the present application more apparent. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The embodiment of the invention provides an oil well microcrack self-healing material, which comprises the raw materials of cement, nano silicon dioxide, sodium silicate, magnesium oxide, fumaric acid, a dispersing agent, a filtrate reducer and water. Optionally, the oil well microfracture self-healing material consists of the above components.
In the embodiment of the invention, the water is used in an amount of 40-50 wt% of the weight of the cement, the nano-silica is used in an amount of 0.5-1.5 wt% of the weight of the cement, the sodium silicate is used in an amount of 1-3 wt% of the weight of the cement, the magnesium oxide is used in an amount of 0.2-1 wt% of the weight of the cement, the fumaric acid is used in an amount of 0.3-1.5 wt% of the weight of the cement, the dispersant is used in an amount of 0.2-0.6 wt% of the weight of the cement, and the fluid loss additive is used in an amount of 0.8-2 wt% of the weight of the cement.
In an embodiment of the present invention, the dispersant is selected from one or more of sodium lignosulfonate, sodium polystyrene sulfonate and sodium polynaphthalene sulfonate.
In an embodiment of the present invention, the fluid loss additive is selected from one or more of carboxymethyl hydroxyethyl cellulose, polyvinyl alcohol and polycarboxylic acid water reducing agent.
In the embodiment of the invention, the particle size of the nano silicon dioxide is 20nm-100 nm.
In the embodiment of the invention, the molar content of sodium oxide in the sodium silicate is 19.3-22.8%.
In the oil well micro-crack self-healing material provided by the invention, the fumaric acid does not contain crystal water, and the purity is more than 99%.
In the self-healing composite material for oil well cement provided by the invention, the content of magnesium oxide is more than 85%, the calcining temperature is 1100-1300 ℃, and the reaction time is 200-300 s.
In the oil well microcrack self-healing material provided by the invention, the cement is G-grade oil well cement, preferably G-grade high-sulfur-resistant oil well cement.
On the other hand, the embodiment of the invention provides a preparation method of the oil well micro-crack self-healing material, which comprises the following steps:
(1) dividing water into two parts of water with equal mass;
(2) dissolving nano silicon dioxide into one part of water;
(3) dissolving sodium silicate, magnesium oxide and fumaric acid into another part of water;
(4) mixing the dispersant, the fluid loss agent and the cement, and stirring the mixture uniformly;
(5) mixing the two parts of water solution obtained in the step (2) and the step (3) and uniformly stirring; and (4) mixing the obtained mixture with the cement mixture to obtain the oil well micro-crack self-healing material.
Optionally, the preparation method of the oil well micro-crack self-healing material consists of the steps.
In the embodiment of the invention, the mixing process is referred to as oil well cement test method GBT 19139-2003.
In the embodiment of the invention, the sodium lignosulfonate is purchased from chemical industry limited of the flourishing age of Jinan, industrial grade, cat 668;
in the present examples, the carboxymethyl hydroxyethyl cellulose was purchased from shangkang chemical ltd, inc, industrials, cat # 00;
in the embodiment of the invention, the sodium polystyrene sulfonate is purchased from chemical industry ltd, industrial grade, article number 607;
in the examples of the present invention, the polyvinyl alcohol was purchased from Shandong flourishing China New Material Co., Ltd., Cat No. 2488;
in the present examples, the sodium polynaphthalenesulfonate was purchased from Kyowa chemical Co., Ltd, technical grade, cat # 25;
in the embodiment of the invention, the polycarboxylate superplasticizer is purchased from Shandong Walld oilfield technology Co., Ltd, industrial grade, article number QU 801;
example 1
Example 1a microcrack self-healing material was prepared according to the following procedure.
1. Weighing two parts of water, wherein each part is 21 g;
2. dissolving 0.5g of nano silicon dioxide with the particle size of 20nm into one part of water, and stirring until the nano silicon dioxide is uniformly dispersed;
3. 1g of sodium silicate and 0.2g of magnesium oxide calcined at 1100 ℃ for 200s and 0.3g of fumaric acid are dissolved in a further portion of water;
4. mixing 0.2g of sodium lignosulfonate and 0.8g of carboxymethyl hydroxyethyl cellulose with 100g G-grade high-sulfur-resistant oil well cement, and stirring uniformly;
5. mixing the two parts of the aqueous solution obtained in the steps 2 and 3 and uniformly stirring; and (3) mixing the self-healing composite material with the cement mixture obtained in the step (4) to obtain self-healing composite material cement paste, wherein the mixing process is referred to an oil well cement test method GB/T19139-.
Pouring cement paste into a cylindrical mold with the thickness of 25mm multiplied by 50mm multiplied by 25mm, curing for 1d in a water bath with the temperature of 80 ℃ and the pressure of 20MPa, and then curing for 14d in a water bath with the temperature of 80 ℃ and the pressure of 20MPa to obtain the cement stone to be sewn.
Example 2
Example 2 a microcrack self-healing material was prepared according to the following procedure.
1. Weighing two parts of water, wherein each part is 23 g;
2. dissolving 1.5g of nano silicon dioxide with the particle size of 80nm into one part of water, and stirring until the nano silicon dioxide is uniformly dispersed;
3. 2g of sodium silicate and 0.6g of magnesium oxide and 0.9g of fumaric acid, calcined at 1200 ℃ for 240s, are dissolved in a further portion of water;
4. 0.4g of sodium polystyrene sulfonate and 1.4g of polyvinyl alcohol are mixed with 100g G-grade high-sulfur-resistance oil well cement and stirred uniformly;
5. mixing and stirring the two parts of the aqueous solutions obtained in the steps 2 and 3 until the two parts of the aqueous solutions are uniform; and (4) mixing the self-healing composite cement slurry with the cement mixture obtained in the step (4) to obtain the self-healing composite cement slurry, wherein the mixing process is referred to an oil well cement test method GBT 19139-.
Pouring cement paste into a cylindrical mold with the thickness of 25mm multiplied by 50mm multiplied by 25mm, curing for 1d in a water bath with the temperature of 80 ℃ and the pressure of 20MPa, and then curing for 14d in a water bath with the temperature of 80 ℃ and the pressure of 20MPa to obtain the cement stone to be sewn.
Example 3
Example 3 a microcrack self-healing material was prepared according to the following procedure.
1. Weighing two parts of water, wherein each part is 25 g;
2. dissolving 1g of nano silicon dioxide with the particle size of 60nm into one part of water, and stirring until the nano silicon dioxide is uniformly dispersed;
3. 3g of sodium silicate and 1g of magnesium oxide calcined at 1300 ℃ for 280s and 1.5g of fumaric acid are dissolved in a further portion of water;
4. mixing 0.6g of sodium polynaphthalenesulfonate and 2g of polycarboxylic acid water reducing agent with 100g G-grade high-sulfur-resistant oil well cement, and stirring uniformly;
5. mixing and stirring the two parts of the aqueous solutions obtained in the steps 2 and 3 until the two parts of the aqueous solutions are uniform; and (4) mixing the self-healing composite cement slurry with the cement mixture obtained in the step (4) to obtain the self-healing composite cement slurry, wherein the mixing process is referred to an oil well cement test method GBT 19139-.
Pouring cement paste into a cylindrical mold with the thickness of 25mm multiplied by 50mm multiplied by 25mm, curing for 1d in a water bath with the temperature of 80 ℃ and the pressure of 20MPa, and then curing for 14d in a water bath with the temperature of 80 ℃ and the pressure of 20MPa to obtain the cement stone to be sewn.
Test example 1
And G-level high-sulfur-resistance oil well cement is set as a control group. Pouring cement paste into a cylindrical mold with the thickness of 25mm multiplied by 50mm multiplied by 25mm, curing for 1d in a water bath with the temperature of 80 ℃ and the pressure of 20MPa, and then curing for 14d in a water bath with the temperature of 80 ℃ and the pressure of 20MPa to obtain the cement stone to be sewn.
The cement stones obtained in examples 1, 2 and 3 and the control group were subjected to manual crack formation, and the cement stones obtained in examples 1 and 3 were tested in the core displacement flow device (test conditions: displacement pressure: 0.5MPa, confining pressure: 2.5MPa) to obtain test results of examples 1,
Permeability of cement stones 0d, 7d, 14d, 28d of examples 2 and 3 and the control group. The results of the set cement permeability tests are listed in table 1.
Table 1 permeability changes during curing of self-healing set cements prepared in examples 1, 2, 3 and control
As can be seen from test example 1, the cement gaps gradually healed with the increase of the number of curing days, and the cement permeability approaches 0.
Test example 2
And G-level high-sulfur-resistance oil well cement is set as a control group. The cement slurries prepared in the examples and the cement slurries of the control groups were poured into a 50mm × 50mm × 50mm cube-shaped mold, and the mold was removed after curing for 1 day in a water bath at 80 ℃ and 20MPa to obtain set cement.
The compression strength values of the set cements 1d, 3d and 7d of examples 1, 2 and 3 and the control group were tested by a compression tester. The results of the set cement compressive strength tests are listed in table 2.
Table 2 changes in compressive strength during curing of self-healing set cements prepared in examples 1, 2, 3 and control
As can be seen from Table 2, the oil well cements prepared in examples 1, 2 and 3 have substantially no change in mechanical properties compared to the control, and do not affect the mechanical properties of the set cement.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. An oil well microfracture self-healing material, wherein the raw materials of the self-healing material comprise cement, nano silicon dioxide, sodium silicate, magnesium oxide, fumaric acid, a dispersing agent, a filtrate reducer and water;
the water is used in an amount of 40-50 wt% of the weight of the cement, the nano-silica is used in an amount of 0.5-1.5 wt% of the weight of the cement, the sodium silicate is used in an amount of 1-3 wt% of the weight of the cement, the magnesium oxide is used in an amount of 0.2-1 wt% of the weight of the cement, the fumaric acid is used in an amount of 0.3-1.5 wt% of the weight of the cement, the dispersant is used in an amount of 0.2-0.6 wt% of the weight of the cement, and the fluid loss additive is used in an amount of 0.8-2 wt% of the weight of the cement.
2. The oil well microfracture self-healing material of claim 1, wherein the dispersant is selected from one or more of sodium lignosulfonate, sodium polystyrene sulfonate, and sodium polynaphthalene sulfonate.
3. The oil well microfracture self-healing material of claim 1, wherein the fluid loss additive is selected from one or more of carboxymethyl hydroxyethyl cellulose, polyvinyl alcohol, and a polycarboxylate water reducer.
4. The oil well microcrack self-healing material of claim 1, wherein the nanosilica has a particle size of 20nm to 100 nm.
5. The oil well microfracture self-healing material of claim 1, wherein the sodium oxide in the sodium silicate is present in a molar amount of 19.3% to 22.8%.
6. The oil well microfracture self-healing material of claim 1, wherein the fumaric acid contains no crystal water and has a purity greater than 99%.
7. The oil well microfracture self-healing material of claim 1, wherein the cement is a grade G oil well cement.
8. The oil well microcrack self-healing material according to claim 1, wherein the magnesium oxide content is high temperature calcined magnesium oxide, the calcination temperature is 1100 ℃ to 1300 ℃ and the calcination time is 200s to 300 s.
9. A method for preparing the oil well microcrack self-healing material according to any one of claims 1 to 8, comprising the following steps:
(1) dividing water into two parts of water with equal mass;
(2) dissolving nano silicon dioxide into one part of water;
(3) dissolving sodium silicate, magnesium oxide and fumaric acid into another part of water;
(4) mixing the dispersant, the fluid loss agent and the cement, and stirring the mixture uniformly;
(5) mixing the two parts of water solution obtained in the step (2) and the step (3) and uniformly stirring; and (4) mixing the obtained mixture with the cement mixture to obtain the oil well micro-crack self-healing material.
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| KR101672714B1 (en) * | 2016-05-02 | 2016-11-07 | 주식회사 청호 | A high early strength cement concrete composition having the improved self-healing, durability and strength for road pavement and a repairing method of road pavement using the same |
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| CN107365097A (en) * | 2017-08-28 | 2017-11-21 | 广东粤盛特种建材有限公司 | A kind of magnesium concrete damage self-repairing additive and preparation method thereof |
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| CN111072328A (en) | 2020-04-28 |
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