CN115043621A - High-density cement slurry resistant to high temperature and carbon dioxide corrosion and preparation method and application thereof - Google Patents
High-density cement slurry resistant to high temperature and carbon dioxide corrosion and preparation method and application thereof Download PDFInfo
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- CN115043621A CN115043621A CN202210318090.3A CN202210318090A CN115043621A CN 115043621 A CN115043621 A CN 115043621A CN 202210318090 A CN202210318090 A CN 202210318090A CN 115043621 A CN115043621 A CN 115043621A
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- 239000004568 cement Substances 0.000 title claims abstract description 128
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 238000005260 corrosion Methods 0.000 title claims abstract description 47
- 239000002002 slurry Substances 0.000 title claims abstract description 47
- 230000007797 corrosion Effects 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 24
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 60
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 47
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000003755 preservative agent Substances 0.000 claims abstract description 34
- 230000002335 preservative effect Effects 0.000 claims abstract description 34
- 239000003381 stabilizer Substances 0.000 claims abstract description 28
- 239000002893 slag Substances 0.000 claims abstract description 25
- 239000002270 dispersing agent Substances 0.000 claims abstract description 23
- 239000013505 freshwater Substances 0.000 claims abstract description 22
- 239000004816 latex Substances 0.000 claims abstract description 17
- 229920000126 latex Polymers 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 239000004576 sand Substances 0.000 claims abstract description 15
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 15
- 239000000378 calcium silicate Substances 0.000 claims abstract description 13
- 229910052918 calcium silicate Inorganic materials 0.000 claims abstract description 13
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims abstract description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 12
- UOURRHZRLGCVDA-UHFFFAOYSA-D pentazinc;dicarbonate;hexahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[O-]C([O-])=O.[O-]C([O-])=O UOURRHZRLGCVDA-UHFFFAOYSA-D 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims description 30
- 238000002156 mixing Methods 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 239000011398 Portland cement Substances 0.000 claims description 10
- 229920001577 copolymer Polymers 0.000 claims description 10
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical compound OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 claims description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 229910052748 manganese Inorganic materials 0.000 claims description 8
- 239000011572 manganese Substances 0.000 claims description 8
- 239000003921 oil Substances 0.000 claims description 7
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 claims description 6
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 claims description 5
- 229920000536 2-Acrylamido-2-methylpropane sulfonic acid Polymers 0.000 claims description 5
- DQICDWQJAOHRCV-UHFFFAOYSA-N 2-ethenyl-1h-imidazole;prop-2-enamide Chemical compound NC(=O)C=C.C=CC1=NC=CN1 DQICDWQJAOHRCV-UHFFFAOYSA-N 0.000 claims description 5
- PYSRRFNXTXNWCD-UHFFFAOYSA-N 3-(2-phenylethenyl)furan-2,5-dione Chemical compound O=C1OC(=O)C(C=CC=2C=CC=CC=2)=C1 PYSRRFNXTXNWCD-UHFFFAOYSA-N 0.000 claims description 5
- 229920000147 Styrene maleic anhydride Polymers 0.000 claims description 5
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 claims description 5
- 229920000417 polynaphthalene Polymers 0.000 claims description 5
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 5
- 229920000428 triblock copolymer Polymers 0.000 claims description 5
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- 229910021538 borax Inorganic materials 0.000 claims description 4
- YIBPLYRWHCQZEB-UHFFFAOYSA-N formaldehyde;propan-2-one Chemical compound O=C.CC(C)=O YIBPLYRWHCQZEB-UHFFFAOYSA-N 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 4
- 239000011593 sulfur Substances 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 claims description 4
- -1 polyvinylamine Chemical compound 0.000 claims description 3
- YPZAWOHRGGHFGI-UHFFFAOYSA-N 3-(3-ethenyl-2-oxopyrrolidin-1-yl)prop-2-enamide Chemical compound NC(=O)C=CN1CCC(C=C)C1=O YPZAWOHRGGHFGI-UHFFFAOYSA-N 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 4
- 229910052799 carbon Inorganic materials 0.000 claims 4
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 20
- 239000000203 mixture Substances 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 8
- 150000003839 salts Chemical class 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 229910021487 silica fume Inorganic materials 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000008719 thickening Effects 0.000 description 4
- UCIAEFXQOXKPNP-UHFFFAOYSA-N n-ethenyl-3-(2-oxopyrrolidin-1-yl)prop-2-enamide Chemical compound C=CNC(=O)C=CN1CCCC1=O UCIAEFXQOXKPNP-UHFFFAOYSA-N 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- DZSVIVLGBJKQAP-UHFFFAOYSA-N 1-(2-methyl-5-propan-2-ylcyclohex-2-en-1-yl)propan-1-one Chemical compound CCC(=O)C1CC(C(C)C)CC=C1C DZSVIVLGBJKQAP-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000004575 stone 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
- 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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/23—Acid resistance, e.g. against acid air or rain
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides high-temperature-resistant carbon dioxide corrosion-resistant high-density cement slurry and a preparation method and application thereof, belonging to the technical field of oil-gas well cementing cement slurry. The high-density cement paste with high temperature resistance, carbon dioxide corrosion resistance and high density provided by the invention comprises the following preparation raw materials in parts by weight: 100 parts of cement; 6-12 parts of a fluid loss agent; 4-9 parts of a dispersing agent; 5-8 parts of a retarder; 35-40 parts of a high-temperature stabilizer, wherein the high-temperature stabilizer is silica sand; 20-40 parts of a high-temperature preservative, wherein the high-temperature preservative is one or more of micro silicon powder, slag, basic zinc carbonate, calcium silicate and latex powder; 50-240 parts of a weighting agent; 56-80 parts of fresh water. The cement paste provided by the invention has strong high temperature resistance, adjustable density in a larger range and CO resistance 2 The corrosion performance is excellent.
Description
Technical Field
The invention relates to the technical field of oil and gas well cementing cement slurry, in particular to high-temperature-resistant carbon dioxide corrosion-resistant high-density cement slurry and a preparation method and application thereof.
Background
Has appeared much in the past decadesContaining CO 2 Oil and gas reservoirs of acid gases, CO 2 The volume ratio is more than 2 percent, even up to 8 percent, and some contain CO 2 Gas-cap reservoir, CO in gas-cap gas component 2 The volume ratio reaches more than 95 percent. With CO content 2 Acid gas reservoirs are increasingly being used to prevent CO 2 The corrosion of the cementing cement sheath by acid gas is a problem which has to be faced in the safe and efficient development of oil and gas fields.
In addition, with the increasing drilling depth at home and abroad, more and more oil and gas wells meeting high-temperature and high-pressure environments are drilled. When the high temperature and high pressure environment and CO in the shaft 2 When gas exists simultaneously, the well cementation cement slurry system not only requires stronger corrosion resistance, but also requires good temperature resistance and higher density. And the voids or micro-cracks of the geological formation contain a large amount of CO 2 Once the pressure in the formation and the formation temperature reach or even exceed CO 2 Critical pressure and critical temperature (CO) of gas 2 Critical pressure of 7.3MPa, critical temperature of 31 ℃ C.), CO 2 The gas is present in the formation in a supercritical state, the supercritical state of CO 2 Has the characteristics of low viscosity and high diffusivity, and can intensify CO 2 Corrosion of set cement. Especially when the temperature and the pressure of the stratum are higher, the corrosion phenomenon is more obvious, and the risk of annular sealing failure of the well cementation cement ring is increased. Therefore, it is aimed at high temperature and high pressure and CO 2 Development of high-temperature-resistant and CO-resistant complex stratum in which acid gas exists simultaneously 2 The problem to be solved at present is high-density cement slurry with corrosion.
Disclosure of Invention
The invention aims to provide a high-temperature-resistant and CO-resistant material 2 The cement paste has strong high temperature resistance, adjustable density in a larger range and CO resistance 2 The corrosion performance is excellent.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides high-density cement paste with high temperature resistance, carbon dioxide corrosion resistance and high density, which comprises the following preparation raw materials in parts by weight:
100 parts of cement;
6-12 parts of a fluid loss agent;
4-9 parts of a dispersing agent;
5-8 parts of a retarder;
35-40 parts of a high-temperature stabilizer, wherein the high-temperature stabilizer is silica sand;
20-40 parts of a high-temperature preservative, wherein the high-temperature preservative is one or more of micro silicon powder, slag, basic zinc carbonate, calcium silicate and latex powder;
50-240 parts of a weighting agent;
56-80 parts of fresh water.
Preferably, the granularity of the silica sand is 100-300 meshes.
Preferably, the cement is a G-grade high-sulfur-resistant portland cement.
Preferably, the fluid loss agent is one or more of 2-acrylamido-2-methylpropanesulfonic acid, polyvinylamine, acrylamide-vinylimidazole binary copolymer and vinylpyrrolidone-acrylamide triblock copolymer.
Preferably, the dispersant is one or more of formaldehyde acetone polycondensate, styrene-maleic anhydride copolymer and polynaphthalene sulfonate.
Preferably, the retarder is one or more of hydroxyethylidene diphosphonic acid, sodium borate and 2-acrylamido-2-methylpropanesulfonic acid/itaconic acid binary copolymer.
Preferably, the weighting agent is one or more of manganese ore powder, iron ore powder and barite powder; the particle size of the weighting agent is 250-1200 meshes.
The invention provides a preparation method of high-density cement slurry with high temperature resistance and carbon dioxide corrosion resistance, which comprises the following steps:
mixing cement, a fluid loss agent, a dispersing agent, a retarder, a high-temperature stabilizer, a high-temperature preservative, a weighting agent and fresh water to obtain the high-density cement slurry with high temperature resistance and carbon dioxide corrosion resistance.
Preferably, the mixing comprises:
firstly mixing cement, a high-temperature stabilizer, a high-temperature preservative and a weighting agent to obtain mixed dry powder;
secondly, mixing the fluid loss agent, the dispersing agent, the retarder and fresh water to obtain mixed feed liquid;
adding the mixed dry powder into the mixed feed liquid under the condition of low stirring speed, and performing third mixing under the condition of high stirring speed after the addition is finished; the low stirring speed is 3500-4500 r/min, and the high stirring speed is 11000-13000 r/min.
The invention provides the application of the high-temperature-resistant carbon dioxide corrosion-resistant high-density cement slurry prepared by the preparation method in the technical scheme or the application of the high-temperature-resistant carbon dioxide corrosion-resistant high-density cement slurry prepared by the preparation method in the technical scheme in well cementing operation of oil and gas wells.
The invention provides high-density cement paste with high temperature resistance and carbon dioxide corrosion resistance, which comprises the following preparation raw materials in parts by weight: 100 parts of cement; 6-12 parts of a fluid loss agent; 4-9 parts of a dispersing agent; 5-8 parts of a retarder; 35-40 parts of a high-temperature stabilizer, wherein the high-temperature stabilizer is silica sand; 20-40 parts of a high-temperature preservative; the high-temperature preservative is one or more of micro silicon powder, slag, basic zinc carbonate, calcium silicate and latex powder; 50-240 parts of a weighting agent; 56-80 parts of fresh water. According to the invention, cement, a fluid loss agent, a dispersing agent, a retarder, a high-temperature stabilizer, a high-temperature preservative, a weighting agent and fresh water with specific contents are compounded for use, so that the obtained cement paste has the characteristic of low liquid-solid ratio, the content of hydration products which are easy to corrode in set cement can be reduced, and the corrosion resistance of the cement paste is improved; the CO resistance of the set cement in a high-temperature environment can be further improved by adding a high-temperature preservative 2 The high-temperature resistance of the set cement can be improved by adding a high-temperature stabilizer, and the cement paste has higher density by adjusting the content of a weighting agent. The cement paste prepared by using the high-temperature preservative, the high-temperature stabilizer and other components has strong high-temperature resistance, adjustable density in a larger range and CO resistance 2 Excellent corrosion performance, zero free liquid of cement paste, good stability, small filtration loss, high compressive strength and thickening timeThe rheological property can be adjusted to meet the construction requirements.
Detailed Description
The invention provides high-density cement paste with high temperature resistance and carbon dioxide corrosion resistance, which comprises the following preparation raw materials in parts by weight:
100 parts of cement;
6-12 parts of a fluid loss agent;
4-9 parts of a dispersing agent;
5-8 parts of a retarder;
35-40 parts of a high-temperature stabilizer; the high-temperature stabilizer is silica sand;
20-40 parts of a high-temperature preservative; the high-temperature preservative is one or more of micro silicon powder, slag, basic zinc carbonate, calcium silicate and latex powder;
50-240 parts of a weighting agent;
56-80 parts of fresh water.
In the present invention, unless otherwise specified, all the starting materials for the preparation are commercially available materials well known to those skilled in the art.
The high temperature and CO resistance is calculated according to the parts by weight 2 The preparation raw material of the corrosive high-density cement slurry comprises 100 parts of cement. In the present invention, the cement is preferably a G-grade high-sulfur-resistant portland cement. In the embodiment of the invention, G-grade high-sulfur-resistant portland cement of Jiahua special cement GmbH in Sichuan is specifically adopted.
Based on the weight portion of the cement, the high temperature and CO resistance cement has the advantages of high temperature resistance and high CO resistance 2 The preparation raw materials of the corrosive high-density cement slurry comprise 6-12 parts of fluid loss additive, preferably 7-11 parts, and more preferably 8-10 parts. In the invention, the fluid loss agent is preferably one or more of 2-acrylamide-2-methylpropanesulfonic acid, polyvinylamine, acrylamide-vinyl imidazole binary copolymer and vinyl pyrrolidone-acrylamide triblock copolymer. The invention preferably adopts the fluid loss agent, is beneficial to improving the high temperature resistance of the cement paste and can effectively reduce the fluid loss of the cement paste.
Based on the weight portion of the cement, the cement has the advantages of high temperature resistance and CO resistance 2 The preparation raw materials of the corrosive high-density cement paste comprise 4-9 parts of a dispersing agent, preferably 5-8 parts, and more preferably 6-7 parts. In the present invention, the dispersant is preferably one or more of a formaldehyde acetone polycondensate, a styrene-maleic anhydride copolymer and a polynaphthalene sulfonate. The dispersant of the above kind is preferably adopted in the invention, and the rheological property of the cement paste can be effectively adjusted.
Based on the weight portion of the cement, the high temperature and CO resistance cement has the advantages of high temperature resistance and high CO resistance 2 The preparation raw materials of the corrosive high-density cement paste comprise 5-8 parts of retarder, preferably 5.5-7.5 parts, and more preferably 6-7 parts. In the invention, the retarder is preferably one or more of hydroxyethylidene diphosphonic acid, sodium borate and 2-acrylamido-2-methylpropanesulfonic Acid (AMPS)/itaconic acid binary copolymer. The retarder is preferably adopted, and the thickening time of the water mud can be adjusted at a higher temperature.
Based on the weight portion of the cement, the high temperature and CO resistance cement has the advantages of high temperature resistance and high CO resistance 2 The preparation raw materials of the corrosive high-density cement slurry comprise 35-40 parts of high-temperature stabilizer, preferably 36-38 parts, and more preferably 37-37.5 parts. In the invention, the high-temperature stabilizer is silica sand; the granularity of the silica sand is preferably 100-300 meshes, and specifically can be 100 meshes, 200 meshes or 300 meshes. According to the invention, silica sand is used as a high-temperature stabilizer, so that the high-temperature resistance of the cement paste can be effectively improved.
Based on the weight portion of the cement, the high temperature and CO resistance cement has the advantages of high temperature resistance and high CO resistance 2 The preparation raw materials of the corrosive high-density cement slurry comprise 20-40 parts of high-temperature preservative, preferably 25-35 parts, and more preferably 28-30 parts. In the invention, the high-temperature preservative is one or more of micro silicon powder (the granularity is preferably 1-10 mu m), slag, basic zinc carbonate, calcium silicate and latex powder; specifically, the following mixture may be used:
the high-temperature preservative is preferably a mixture of latex powder and slag, and the mass ratio of the latex powder to the slag in the mixture of the latex powder and the slag is preferably 20: (50 to 90), more preferably 20: (70-85), more preferably 20: 80;
or, the high-temperature preservative is preferably a mixture of slag, basic zinc carbonate and calcium silicate, and the mass ratio of the slag, the basic zinc carbonate and the calcium silicate is preferably 85: (5-10): (5-10), more preferably 85: (5-7): (8-10), more preferably 85: 5: 10;
or, the high-temperature preservative is preferably a mixture of slag, latex powder and silica fume, and the mass ratio of the slag, the latex powder and the silica fume is preferably 70: (5-20): (10 to 25), more preferably 70: (8-15): (15-22), more preferably 70: 10: 20;
or, the high-temperature preservative is preferably a mixture of micro silicon powder and slag, and the mass ratio of the micro silicon powder to the slag is preferably 25: (50 to 90), more preferably 25: (70-80), more preferably 25: 75;
alternatively, the high-temperature corrosion inhibitor is preferably a mixture of slag and calcium silicate, and the mass ratio of the slag to the calcium silicate is preferably 85: (5-30), more preferably 85: (10-20), more preferably 85: 15;
or, the high-temperature preservative is preferably a mixture of micro silicon powder and latex powder, and the mass ratio of the micro silicon powder to the latex powder is preferably 65: (20-40), more preferably 65: (30-37), more preferably 65: 35.
the invention preferably adopts the high-temperature preservative, and can improve the high-temperature resistance of the set cement.
Based on the weight portion of the cement, the high temperature and CO resistance cement has the advantages of high temperature resistance and high CO resistance 2 The preparation raw materials of the corrosive high-density cement slurry comprise 50-240 parts of weighting agent, preferably 70-190 parts, and further preferably 110-140 parts. In the invention, the weighting agent is preferably one or more of manganese ore powder, iron ore powder and barite powder; the particle size of the weighting agent is preferably 250-1200 meshes, specifically, the mesh number of the manganese ore powder is preferably 1200 meshes, the mesh number of the iron ore powder is preferably 250 meshes or 1200 meshes, and the mesh number of the barite powder is preferably 1200 meshes. The invention preferably adopts the weighting agent of the kind, and can effectively adjust the density of the cement paste.
Based on the weight portion of the cement, the inventionThe high temperature and CO resistance 2 The preparation raw materials of the corrosive high-density cement slurry comprise 56-80 parts of fresh water, preferably 60-75 parts of fresh water, and more preferably 66-73 parts of fresh water. In the invention, the fresh water is water with salt content less than 0.5 g/L.
In the invention, the liquid-solid ratio of the cement slurry is preferably 0.27-0.33; the liquid-solid ratio is the mass ratio of the liquid raw material to the dry powder raw material.
The cement paste has the characteristics of low liquid-solid ratio, strong high-temperature resistance, adjustable density in a large range and CO resistance 2 The cement slurry has the advantages of excellent corrosion performance, zero free liquid of the cement slurry, good stability, small filtration loss, high compressive strength, adjustable thickening time and rheological property meeting construction requirements.
The invention provides a preparation method of high-density cement slurry with high temperature resistance and carbon dioxide corrosion resistance, which comprises the following steps:
mixing cement, a fluid loss agent, a dispersing agent, a retarder, a high-temperature stabilizer, a high-temperature preservative, a weighting agent and fresh water to obtain the high-density cement slurry with high temperature resistance and carbon dioxide corrosion resistance.
In the present invention, the mixing preferably comprises: firstly mixing cement, a high-temperature stabilizer, a high-temperature preservative and a weighting agent to obtain mixed dry powder; secondly, mixing the fluid loss agent, the dispersing agent, the retarder and fresh water to obtain mixed feed liquid; and adding the mixed dry powder into the mixed feed liquid under the condition of low stirring speed, and performing third mixing under the condition of high stirring speed after the addition is finished. The first mixing and the second mixing are not particularly limited, and all the components can be uniformly mixed. In the invention, the low stirring speed is preferably 3500-4500 r/min, more preferably 4000 +/-200 r/min; the high stirring speed is preferably 11000 to 13000r/min, and more preferably 12000 +/-500 r/min. In the invention, the feeding time of the mixed dry powder is preferably controlled within 15s, and the mixed dry powder is preferably fed at a constant speed; the time of the third mixing is preferably 30-40 s, and more preferably 35 +/-1 s.
The invention provides the technical scheme for resisting high temperatureThe high-density cement slurry with the carbon dioxide corrosion resistance or the high-density cement slurry with the high temperature resistance and the carbon dioxide corrosion resistance prepared by the preparation method in the technical scheme is applied to the well cementing operation of an oil-gas well. In the invention, the oil-gas well suitable for the high-temperature-resistant carbon dioxide corrosion-resistant high-density cement slurry is a high-temperature high-pressure acid oil-gas well, the temperature of the oil-gas well can be 110-200 ℃, the pressure of the oil-gas well can be 10-100 MPa, and acid gas (CO) is generated 2 ) The volume fraction of (A) may be 0 to 100%.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Mixing 100 parts by weight of cement (specifically G-grade portland cement purchased from special cement of Jiahua Sichuan company), 35 parts by weight of high-temperature stabilizer (specifically silica sand with 100 meshes), 30 parts by weight of high-temperature preservative (specifically a mixture of latex powder and slag with a mass ratio of 20: 80) and 50 parts by weight of weighting agent (specifically manganese ore powder with 1200 meshes) to obtain mixed dry powder; mixing 56 parts of fresh water (the salt content is less than 0.5g/L), 6 parts of fluid loss additive (specifically, vinyl pyrrolidone-acrylamide triblock copolymer), 4 parts of dispersing agent (specifically, formaldehyde acetone polycondensate) and 6 parts of retarder (specifically, hydroxy ethylidene diphosphonic acid) to obtain mixed feed liquid; putting the mixed liquid into a stirring cup, rotating at a low speed (4000 +/-200 r/min) by using a corrugated stirrer, uniformly adding the mixed dry powder within 15s, covering a stirring cup cover after adding the mixed dry powder, and stirring at a high speed (12000 +/-500 r/min) for 35 +/-1 s to obtain the high-temperature-resistant and CO-resistant mixed liquid 2 And corroding the high-density cement paste.
Example 2
100 parts by weight of cement (in particular G-grade portland cement, available from Kaga-Sichuan specialty Cement Co., Ltd.),Mixing 35 parts of high-temperature stabilizer (specifically silica sand with the mesh number of 200 meshes), 40 parts of high-temperature preservative (specifically mixture of slag, basic zinc carbonate and calcium silicate, the mass ratio of the slag to the basic zinc carbonate to the calcium silicate is 85: 5: 10) and 70 parts of weighting agent (specifically iron ore powder with the mesh number of 1200 meshes) to obtain mixed dry powder; mixing 60 parts of fresh water (the salt content is less than 0.5g/L), 6 parts of fluid loss additive (specifically acrylamide-vinyl imidazole binary copolymer), 4 parts of dispersant (specifically styrene-maleic anhydride copolymer) and 8 parts of retarder (specifically sodium borate) to obtain mixed feed liquid; putting the mixed liquid into a stirring cup, rotating at a low speed (4000 +/-200 r/min) by using a corrugated stirrer, uniformly adding the mixed dry powder within 15s, covering a stirring cup cover after adding the mixed dry powder, and stirring at a high speed (12000 +/-500 r/min) for 35 +/-1 s to obtain the high-temperature-resistant and CO-resistant mixed liquid 2 And corroding the high-density cement paste.
Example 3
Mixing 100 parts of cement (specifically G-grade portland cement purchased from Sichuan Jiahua special cement Co., Ltd.), 35 parts of high-temperature stabilizer (specifically silicon powder with the mesh number of 300 meshes), 35 parts of high-temperature preservative (specifically a mixture of slag, latex powder and micro silicon powder with the mass ratio of 70: 10: 20) and 110 parts of weighting agent (specifically manganese ore powder with the mesh number of 1200 meshes) according to parts by weight to obtain mixed dry powder; mixing 66 parts of fresh water (the salt content is less than 0.5g/L), 8 parts of fluid loss agent (specifically 2-acrylamido-2-methylpropanesulfonic acid), 6 parts of dispersant (specifically polynaphthalene sulfonate) and 7 parts of retarder (specifically 2-acrylamido-2-methylpropanesulfonic Acid (AMPS)/itaconic acid binary copolymer) to obtain a mixed feed liquid; putting the mixed liquid into a stirring cup, rotating at a low speed (4000 +/-200 r/min) by using a corrugated stirrer, uniformly adding the mixed dry powder within 15s, covering a stirring cup cover after adding the mixed dry powder, and stirring at a high speed (12000 +/-500 r/min) for 35 +/-1 s to obtain the high-temperature-resistant and CO-resistant mixed liquid 2 And corroding the high-density cement paste.
Example 4
Based on the weight portion, 100 portions of cement (specifically G-level portland cement purchased from Sichuan Jiahua special cement strand)Company Limited), 37.5 parts of high-temperature stabilizer (specifically silica sand with the mesh number of 300 meshes), 30 parts of high-temperature preservative (specifically a mixture of silica fume and slag, wherein the mass ratio of the silica fume to the slag is 25: 75) and 140 parts of weighting agent (specifically, iron ore powder, a mixture with the mesh number of 1200 meshes and 250 meshes, wherein the mass ratio of the 1200-mesh iron ore powder to the 250-mesh iron ore powder is 50: 50) mixing to obtain mixed dry powder; mixing 70 parts of fresh water (the salt content is less than 0.5g/L), 10 parts of fluid loss additive (specifically, polyvinylamine), 7 parts of dispersant (specifically, polyvinylamine) and 6 parts of retarder (specifically, hydroxyethylidene diphosphonic acid) to obtain mixed feed liquid; putting the mixed liquid into a stirring cup, rotating at a low speed (4000 +/-200 r/min) by using a corrugated stirrer, uniformly adding the mixed dry powder within 15s, covering a stirring cup cover after adding the mixed dry powder, and stirring at a high speed (12000 +/-500 r/min) for 35 +/-1 s to obtain the high-temperature-resistant and CO-resistant mixed liquid 2 And corroding the high-density cement paste.
Example 5
Mixing 100 parts by weight of cement (specifically G-grade portland cement purchased from special cement of Jiahua Sichuan company), 37.5 parts by weight of high-temperature stabilizer (specifically silica sand with the mesh number of 300), 25 parts by weight of high-temperature preservative (specifically a mixture of slag and calcium silicate with the mass ratio of 85: 15) and 190 parts by weight of weighting agent (specifically manganese ore powder with the mesh number of 1200) to obtain mixed dry powder; mixing 73 parts of fresh water (the salt content is less than 0.5g/L), 10 parts of fluid loss agent (specifically acrylamide-vinyl imidazole binary copolymer), 8 parts of dispersing agent (specifically polynaphthalene sulfonate) and 5 parts of retarder (specifically hydroxy ethylidene diphosphonic acid) to obtain mixed feed liquid; putting the mixed liquid into a stirring cup, rotating at a low speed (4000 +/-200 r/min) by using a corrugated stirrer, uniformly adding the mixed dry powder within 15s, covering a stirring cup cover after adding the mixed dry powder, and stirring at a high speed (12000 +/-500 r/min) for 35 +/-1 s to obtain the high-temperature-resistant and CO-resistant mixed liquid 2 And corroding the high-density cement paste.
Example 6
100 parts of cement (specifically, G-grade portland cement, available from Kaga, Sichuan specialty Cement Co., Ltd.) and 40 parts of high temperature stabilizer are addedMixing an agent (specifically silica sand with the mesh number of 200 meshes), 20 parts of a high-temperature preservative (specifically a mixture of silica fume and latex powder, wherein the mass ratio of the silica fume to the latex powder is 65: 35) and 240 parts of a weighting agent (specifically manganese ore powder with the mesh number of 1200 meshes) to obtain mixed dry powder; mixing 80 parts of fresh water (the salt content is less than 0.5g/L), 12 parts of fluid loss additive (specifically, vinyl pyrrolidone-acrylamide triblock copolymer), 9 parts of dispersant (specifically, styrene-maleic anhydride copolymer) and 6 parts of retarder (specifically, 2-acrylamido-2-methylpropanesulfonic Acid (AMPS)/itaconic acid binary copolymer) to obtain mixed feed liquid; putting the mixed liquid into a stirring cup, rotating at a low speed (4000 +/-200 r/min) by using a corrugated stirrer, uniformly adding the mixed dry powder within 15s, covering a stirring cup cover after adding the mixed dry powder, and stirring at a high speed (12000 +/-500 r/min) for 35 +/-1 s to obtain the high-temperature-resistant and CO-resistant mixed liquid 2 And corroding the high-density cement paste.
High temperature and CO resistance in examples 1 to 6 2 The corrosive high density cement slurry composition is shown in table 1.
TABLE 1 high temperature CO resistance in examples 1-6 2 Corrosion high density cement slurry composition (parts by weight)
Comparative example 1
A cement slurry was prepared as in example 4, except that the high temperature corrosion inhibitor was replaced with fly ash (a particular source is commercially available).
Comparative example 2
A cement slurry was prepared as in example 4, except that the high temperature preservative was omitted.
Performance test
The cement paste prepared in the embodiment and the comparative example is subjected to performance test, specifically, after a cement paste system is prepared according to API specifications, the cement paste system is subjected to performance test according to well cementation test standard API10B-2-2005, the construction performance test result is shown in Table 2, the high temperature resistance test result is shown in Table 3, and the corrosion resistance test result is shown in Table 4.
TABLE 2 workability of the examples and comparative prepared grouts
TABLE 3 high temperature resistance of the slurries of the examples and comparative preparation (curing temperature 180 ℃ C., curing pressure 21MPa)
TABLE 4 anti-corrosive properties of the slurries of the examples and comparative preparation (curing conditions: 150 ℃, 35MPa, 30% CO) 2 Partial pressure, 30d)
As can be seen from Table 1, the present invention provides a high temperature and CO resistance 2 The density of the corroded high-density cement paste is 1.9-2.4 g/cm 3 Adjustable, no free liquid exists, the cement paste has better stability, low water loss, controllable thickening time and good rheological property. As can be seen from Table 2, the present invention provides high temperature and CO resistance 2 The compression strength of the cement stone obtained after the corrosive high-density cement slurry is maintained for 28 days in a high-temperature environment (180 ℃, 21MPa) is not greatly reduced, the high-temperature compression strength is relatively stable, and the high-temperature resistance is good. As can be seen from Table 3, the present invention provides high temperature and CO resistance 2 High temperature corrosion (150 ℃, 35MPa, 30% CO) of high density cement slurry 2 Partial pressure) 30 days, the reduction rate of the compressive strength of the obtained cement is within 13 percent, the increase rate of the permeability is less than 17 percent, the corrosion depth is less than 1.5mm, and the cement resists CO 2 The corrosion performance is excellent. Compared with the common slag anticorrosive cement slurry in the comparative example 1 and the non-anticorrosive cement slurry in the comparative example 2The comparison of the agent cement paste shows that the high temperature resistance and the CO resistance provided by the invention 2 The comprehensive performance of the corrosive high-density cement slurry is more excellent, and the corrosion resistance is better.
In conclusion, the high temperature and CO resistance provided by the invention 2 The corrosive high-density cement paste has good construction performance, adjustable density in a larger range, good high-temperature resistance and CO resistance 2 The corrosion performance is excellent. The above properties are helpful for ensuring the well cementation cement sheath to be in high temperature and high pressure and CO 2 Meanwhile, the sealing integrity under the environment exists, and the method provides favorable support for cementing the high-temperature and high-pressure acidic oil and gas reservoir.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The high-density cement paste with high temperature resistance and carbon dioxide corrosion resistance comprises the following preparation raw materials in parts by weight:
100 parts of cement;
6-12 parts of a fluid loss agent;
4-9 parts of a dispersing agent;
5-8 parts of a retarder;
35-40 parts of a high-temperature stabilizer, wherein the high-temperature stabilizer is silica sand;
20-40 parts of a high-temperature preservative, wherein the high-temperature preservative is one or more of micro silicon powder, slag, basic zinc carbonate, calcium silicate and latex powder;
50-240 parts of a weighting agent;
56-80 parts of fresh water.
2. The high-density cement slurry resistant to high temperature and carbon dioxide corrosion according to claim 1, wherein the silica sand has a particle size of 100-300 meshes.
3. The high-temperature-resistant carbon dioxide-corrosion-resistant high-density cement slurry as claimed in claim 1, wherein the cement is a G-grade high-sulfur-resistant portland cement.
4. The high-temperature-resistant carbon dioxide-corrosion-resistant high-density cement slurry as claimed in claim 1, wherein the fluid loss agent is one or more of 2-acrylamido-2-methylpropanesulfonic acid, polyvinylamine, acrylamide-vinylimidazole binary copolymer and vinylpyrrolidone-acrylamide triblock copolymer.
5. The high-temperature-resistant carbon dioxide-corrosion-resistant high-density cement slurry as claimed in claim 1, wherein the dispersant is one or more of formaldehyde acetone polycondensate, styrene-maleic anhydride copolymer and polynaphthalene sulfonate.
6. The high-temperature-resistant carbon dioxide-corrosion-resistant high-density cement slurry as claimed in claim 1, wherein the retarder is one or more of hydroxyethylidene diphosphonic acid, sodium borate and 2-acrylamido-2-methylpropanesulfonic acid/itaconic acid binary copolymer.
7. The high-density cement slurry resistant to high temperature and carbon dioxide corrosion according to claim 1, wherein the weighting agent is one or more of manganese ore powder, iron ore powder and barite powder; the particle size of the weighting agent is 250-1200 meshes.
8. The preparation method of the high-density cement slurry with high temperature resistance and carbon dioxide corrosion resistance as claimed in any one of claims 1 to 7, comprising the following steps:
mixing cement, a fluid loss agent, a dispersing agent, a retarder, a high-temperature stabilizer, a high-temperature preservative, a weighting agent and fresh water to obtain the high-density cement slurry with high temperature resistance and carbon dioxide corrosion resistance.
9. The method of manufacturing of claim 8, wherein the mixing comprises:
firstly mixing cement, a high-temperature stabilizer, a high-temperature preservative and a weighting agent to obtain mixed dry powder;
secondly, mixing the fluid loss agent, the dispersing agent, the retarder and fresh water to obtain mixed feed liquid;
adding the mixed dry powder into the mixed feed liquid under the condition of low stirring speed, and performing third mixing under the condition of high stirring speed after the addition is finished; the low stirring speed is 3500-4500 r/min, and the high stirring speed is 11000-13000 r/min.
10. The application of the high-temperature-resistant carbon dioxide corrosion-resistant high-density cement slurry as defined in any one of claims 1 to 7 or the high-temperature-resistant carbon dioxide corrosion-resistant high-density cement slurry prepared by the preparation method as defined in claim 8 or 9 in well cementing operation of oil and gas wells.
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