CN108751753B - High-temperature well cementing cement and high-temperature well cementing cement slurry - Google Patents
High-temperature well cementing cement and high-temperature well cementing cement slurry Download PDFInfo
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- CN108751753B CN108751753B CN201810779121.9A CN201810779121A CN108751753B CN 108751753 B CN108751753 B CN 108751753B CN 201810779121 A CN201810779121 A CN 201810779121A CN 108751753 B CN108751753 B CN 108751753B
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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
- C04B7/00—Hydraulic cements
- C04B7/02—Portland cement
- C04B7/04—Portland cement using raw materials containing gypsum, i.e. processes of the Mueller-Kuehne type
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/17—Mixtures thereof with other inorganic cementitious materials or other activators with calcium oxide containing activators
- C04B7/19—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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
-
- 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
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention relates to high-temperature well cementation cement and high-temperature well cementation cement paste, wherein the high-temperature well cementation cement comprises cement clinker and gypsum; the mineral composition of the cement clinker comprises the following components in percentage by weight: tricalcium silicate: 30-40%; dicalcium silicate: 45-60 percent; tricalcium aluminate: 1 to 4 percent; tetracalcium aluminoferrite: 10 to 20 percent. The invention starts with the optimization and matching of the mineral composition of the cement-based material, adjusts the contents of tricalcium silicate, dicalcium silicate, tricalcium aluminate and tetracalcium aluminoferrite of the cement components, ensures that the hydration process of the cement better meets the high-temperature well cementation requirement, can effectively solve the problem of the decline of the high-temperature strength of the cement stone in the well cementation engineering of deep wells and ultra-deep wells, has simple and easily obtained preparation method, can replace the existing high-temperature well cementation cement and well cementation cement paste system, and is beneficial to the structural durability and the safety of the high-temperature complex well cementation engineering.
Description
Technical Field
The invention relates to the field of cement, in particular to high-temperature well cementation cement, a preparation method and high-temperature well cementation cement slurry.
Background
With the continuous development of economy in China, the demand on oil will be greater and greater, and exploration, development, production, supply and safety of oil and natural gas are directly related to the life line of national economy development. With the complexity and the depth of the petroleum and natural gas exploitation geological environment and the continuous increase of the underground rock stratum structure and the temperature pressure, the exploitation of oil and gas resources in the complex geological environment is regarded as an important leading territory of the petroleum industry and is a strategic high point of competition of countries in the world. In China, oil and gas resources in deep layers (buried depth 3500-.
Well cementation is the premise and the foundation of safe, economic and efficient development of oil and gas resources and is also a key link of oil and gas well construction engineering, and the well cementation is to inject cement slurry into the annular space between a casing and a stratum to pack and isolate complex strata which are easy to collapse and leak and the like, pack an oil and gas water layer, establish an oil and gas outflow channel, prevent the mutual channeling between production layers, protect the casing and the like. Therefore, the quality of well cementation directly influences the exploitation safety, the production life and the economic benefit of the oil and gas well. However, in complex deep well cementing, the cement slurry system is difficult to design under the conditions of high temperature, high pressure and high density (the bottom circulation temperature is more than 160 ℃ and the bottom pressure is more than 140MPa), and the strength of the set cement is reduced due to the bottom high temperature; the cement at the top is subjected to super retarding (more than 6000m is sealed by the Tarim Ordovician ceramic system at one time, and the temperature difference between the upper part and the lower part can reach 100 ℃) caused by large temperature difference of a middle-long sealing section of the primary upward-returning well cementation; early gas channeling and later annular pressure are caused by insufficient gas channeling prevention capability of cement paste; the corrosive media such as hydrogen sulfide and carbon dioxide corrode cement stones, influence the well cementation quality and the like, and the technical difficulties are urgently needed to be solved, and the solution of the technical difficulties is necessary to depend on the breakthrough of the well cementation cement slurry material.
The existing high-temperature well cementation cement generally takes G-grade well cementation cement as basic cement, and high-temperature well cementation cement slurry is prepared on the basis of adding admixture such as fly ash, slag and the like and a high-temperature retarder so as to meet the requirements of well cementation construction. However, with the existing cementing cement materials, the strength of the set cement is secondarily degraded along with the increase of the temperature (more than 150 ℃) and the extension of the curing age. The calcium-silicon ratio of the G-grade cement mineral determines that the crystal form of a hydration product is unstable at high temperature, so that the structure is unstable, and the long-term durability of the well cementation cement sheath is insufficient although the well cementation requirement is met by simply adding the admixture, so that the recovery ratio of the oil-gas well is influenced.
Disclosure of Invention
The invention mainly aims to provide novel high-temperature well cementing cement and high-temperature well cementing cement slurry, and aims to solve the technical problem that the problem of decline of high-temperature strength of cement stones in deep well and ultra-deep well cementing engineering is effectively solved, so that the cement slurry is more practical.
The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. The high-temperature well cementation cement provided by the invention comprises cement clinker and gypsum; the mineral composition of the cement clinker comprises the following components in percentage by weight:
tricalcium silicate: 30-40%;
dicalcium silicate: 45-60 percent;
tricalcium aluminate: 1 to 4 percent;
tetracalcium aluminoferrite: 10 to 20 percent.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Preferably, the cement clinker is obtained by grinding and calcining raw materials, and the raw materials comprise, by weight:
calcareous raw materials: 60 to 80 percent;
clay raw material: 5 to 30 percent;
iron powder: 0 to 10 percent;
industrial waste residues: 0 to 40 percent;
correcting raw materials: 0 to 40 percent;
wherein the iron powder, the industrial waste residue and the correction raw material are not 0 at the same time.
Preferably, the cement for high temperature well cementation is prepared from the following raw materials in percentage by weight: 96:4-94:6.
Preferably, the high-temperature well cement is formed by mixing gypsum, dihydrate gypsum, anhydrite or industrial by-product gypsum.
Preferably, the specific surface area of the high-temperature well cementation cement is 280-400m2/kg。
Preferably, the thickening time of the high-temperature well-cementing cement is 120-200 min; the compressive strength is more than or equal to 30MPa after curing for 7 days at 38 ℃; after curing for 7 days at the temperature of 150 ℃ and 300 ℃, the compressive strength is more than or equal to 30MPa, and the strength degradation rate is less than 5 percent compared with that at the normal temperature of 38 ℃.
The object of the present invention and the technical problem to be solved are also achieved by the following technical means. The invention provides high-temperature well cementation cement slurry which comprises the following components in parts by weight:
high-temperature well cementing cement: 100 parts of (A);
water: 44-50 parts;
high temperature resistant retarder: 1-5 parts;
fluid loss agent: 1-5 parts;
wherein the high-temperature well cementation cement is the high-temperature well cementation cement.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Preferably, the high-temperature cementing cement slurry is formed by mixing the high-temperature resistant retarder and the high-temperature resistant retarder.
Preferably, the fluid loss additive is at least one of carboxymethyl cellulose, hydroxyethyl cellulose and carboxymethyl hydroxyethyl cellulose.
Preferably, the thickening time of the high-temperature well cementation cement slurry is 120-; after 150-day-old 300-DEG C high-temperature curing, the compressive strength is more than or equal to 30MPa after 7d, the strength is degenerated by less than 5 percent, and the elastic modulus of 7d is less than 7 GPa.
By the technical scheme, the high-temperature well cementation cement and the high-temperature well cementation cement slurry at least have the following advantages:
the cement for high-temperature well cementation can effectively solve the problem of decline of high-temperature strength of cement stones in deep well and ultra-deep well cementing engineering, is simple and easy to obtain in a preparation method, can replace the existing high-temperature well cementation cement and well cementation cement slurry system, and is beneficial to structural durability and safety of high-temperature complex deep well cementing engineering.
The foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to be implemented in accordance with the present specification, the following is a detailed description of the preferred embodiments of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given to the specific embodiments, structures, characteristics and effects of the high temperature well cement and the high temperature well cement slurry according to the present invention in combination with the preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The invention provides high-temperature well cementation cement, which comprises cement clinker and gypsum; the mineral composition of the cement clinker comprises the following components in percentage by weight:
tricalcium silicate: 30-40%;
dicalcium silicate: 45-60 percent;
tricalcium aluminate: 1 to 4 percent;
tetracalcium aluminoferrite: 10 to 20 percent.
Preferably, the cement clinker is obtained by grinding and calcining a raw meal, said raw meal comprising, in weight percent:
calcareous raw materials: 60 to 80 percent;
clay raw material: 5 to 30 percent;
iron powder: 0 to 10 percent;
industrial waste residues: 0 to 40 percent;
correcting raw materials: 0 to 40 percent;
wherein the iron powder, the industrial waste residue and the correction raw material are not 0 at the same time.
Preferably, the weight ratio of the cement clinker to the gypsum is: 96:4-94:6.
Preferably, the gypsum is dihydrate gypsum, anhydrite or industrial by-product gypsum.
Preferably, the specific surface area of the high-temperature well cementation cement is 280-400m2/kg。
Preferably, the thickening time of the high-temperature well cementation cement is 120-200 min; the compressive strength is more than or equal to 30MPa after curing for 7 days at 38 ℃; after curing for 7 days at the temperature of 150 ℃ and 300 ℃, the compressive strength is more than or equal to 30MPa, and the strength degradation rate is less than 5 percent compared with that at the normal temperature of 38 ℃.
Another embodiment of the present invention provides a high temperature well cementation cement slurry, which comprises the following components in parts by weight:
high-temperature well cementing cement: 100 parts of (A);
water: 44-50 parts;
high temperature resistant retarder: 1-5 parts;
fluid loss agent: 1-5 parts;
wherein the high-temperature well cementation cement is the high-temperature well cementation cement.
Preferably, the high temperature resistant retarder is citric acid and/or a non-lignin yellowing salt.
Preferably, the fluid loss additive is at least one of carboxymethyl cellulose, hydroxyethyl cellulose and carboxymethyl hydroxyethyl cellulose.
Preferably, the thickening time of the high-temperature well cementation cement slurry is 120-360 min; after 150-day-old 300-DEG C high-temperature curing, the compressive strength is more than or equal to 30MPa after 7d, the strength is degenerated by less than 5 percent, and the elastic modulus of 7d is less than 7 GPa.
The raw materials of the inventive examples are shown in table 1.
TABLE 1 examples 1-5 raw material formulation (unit: weight percentage) of high temperature well cement
According to the above examples, the present invention proposes that the mineral composition of the cement clinker of the following high temperature well cementation cement examples 1 to 5 is shown in table 2.
TABLE 2 composition of cement clinker for high temperature well cementing cement examples 1-5
After the high-temperature well-cementing cements of examples 1 to 5 were ground to a suitable fineness, a physical property test of the cement (refer to the specific surface area test method, the Bosch method) was carried out, and the results are shown in Table 3.
TABLE 3 specific surface area of high temperature well cementation cements of examples 1-5
Specific surface area, m2/kg | |
Example 1 | 290 |
Example 2 | 312 |
Example 3 | 305 |
Example 4 | 335 |
Example 5 | 358 |
After the cement for high temperature cementing in the embodiment 1-5 is ground to a proper fineness, the physical performance test of the cement (refer to GB/T10238-.
TABLE 4 specific surface area of high temperature well cementation cements of examples 1-5
Thickening time, min | |
Example 1 | 125 |
Example 2 | 143 |
Example 3 | 139 |
Example 4 | 128 |
Example 5 | 162 |
After the cement for high temperature well cementation of the embodiment 1-5 is ground to a proper fineness, the physical performance test of the cement (refer to GB/T10238-.
TABLE 5 examples 1-5 Normal temperature compressive strength results for high temperature cementing cements
TABLE 6 high temperature compressive strength results for high temperature cementing cements of examples 1-5
After the high-temperature well cementation cement of the embodiment examples 1 to 5 was ground to a proper fineness, an elastic modulus test (static method) of the cement was performed, and the results are shown in table 7.
TABLE 7 elastic modulus results for high temperature well cementation cements from examples 1-5
According to the above examples, the present invention proposes the following high temperature well cementing slurries, the compositions of which are shown in Table 8 for examples 1-5.
TABLE 8 examples 1-5 compositions of high temperature cementing slurries (unit: parts by weight)
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.
Claims (8)
1. The application of cement in high-temperature well cementation is characterized in that the cement comprises cement clinker and gypsum; the mineral composition of the cement clinker comprises the following components in percentage by weight:
tricalcium silicate: 30-40%;
dicalcium silicate: 45-60 percent;
tricalcium aluminate: 1 to 4 percent;
tetracalcium aluminoferrite: 10 to 20 percent;
the thickening time of the cement is 120-200 min; the compressive strength is more than or equal to 30MPa after curing for 7 days at 38 ℃; after curing for 7 days at the temperature of 150 ℃ and 300 ℃, the compressive strength is more than or equal to 30MPa, and the strength degradation rate is less than 5 percent compared with that at the normal temperature of 38 ℃.
2. Use of cement according to claim 1 for high temperature cementing of wells, wherein said cement clinker is obtained by grinding and calcining a raw meal comprising, in weight percent:
calcareous raw materials: 60 to 80 percent;
clay raw material: 5 to 30 percent;
iron powder: 0 to 10 percent;
industrial waste residues: 0 to 40 percent;
correcting raw materials: 0 to 40 percent;
wherein the iron powder, the industrial waste residue and the correction raw material are not 0 at the same time.
3. Use of cement according to claim 1 for high temperature cementing of wells, wherein the weight ratio of cement clinker to gypsum is: 96:4-94:6.
4. Use of a cement according to claim 1 for high temperature cementing of a well, wherein said gypsum is dihydrate gypsum, anhydrite or industrial by-product gypsum.
5. The use of the cement according to claim 1 in high temperature cementing of a well, characterized in that the specific surface area of the cement is 280-400m2/kg。
6. The application of cement slurry in high-temperature well cementation is characterized by comprising the following components in parts by weight:
cement: 100 parts of (A);
water: 44-50 parts;
high temperature resistant retarder: 1-5 parts;
fluid loss agent: 1-5 parts;
wherein the cement comprises cement clinker and gypsum; the mineral composition of the cement clinker comprises the following components in percentage by weight:
tricalcium silicate: 30-40%;
dicalcium silicate: 45-60 percent;
tricalcium aluminate: 1 to 4 percent;
tetracalcium aluminoferrite: 10 to 20 percent;
the thickening time of the cement is 120-200 min; the compressive strength is more than or equal to 30MPa after curing for 7 days at 38 ℃; after curing for 7 days at the temperature of 150 ℃ and 300 ℃, the compressive strength is more than or equal to 30MPa, and the strength degradation rate is less than 5 percent compared with that at the normal temperature of 38 ℃;
the thickening time of the cement slurry is 120-360 min; after 150-day-old 300-DEG C high-temperature curing, the compressive strength is more than or equal to 30MPa after 7d, the strength is degenerated by less than 5 percent, and the elastic modulus of 7d is less than 7 GPa.
7. Use of a cement slurry in high temperature cementing according to claim 6, characterized in that the high temperature resistant retarder is citric acid and/or a non-lignin yellowing salt.
8. Use of a cement slurry in high temperature cementing of a well according to claim 6 wherein the fluid loss additive is at least one of carboxymethyl cellulose, hydroxyethyl cellulose and carboxymethyl hydroxyethyl cellulose.
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CN112094060A (en) * | 2020-09-27 | 2020-12-18 | 大连水泥集团有限公司 | High-temperature well cementation cement and preparation method and application thereof |
CN113213785B (en) * | 2021-06-04 | 2023-03-17 | 嘉华特种水泥股份有限公司 | High-strength low-hydration heat cementing cement and preparation method thereof |
CN114276118A (en) * | 2021-12-31 | 2022-04-05 | 中建材中研益科技有限公司 | High-temperature-resistant anti-erosion oil well cement |
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CN106277864A (en) * | 2016-08-26 | 2017-01-04 | 中国建筑材料科学研究总院 | Sea work low-heat portland cement clinker aggregate and preparation method thereof |
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CN106316172A (en) * | 2016-08-25 | 2017-01-11 | 中国建筑材料科学研究总院 | Superfine high-strength high-belite cement and preparation method thereof |
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CN105384367A (en) * | 2015-11-06 | 2016-03-09 | 中国建筑材料科学研究总院 | Composite system low-heat cement |
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