CN111205051A - Oil well cement for well cementation and preparation method thereof - Google Patents
Oil well cement for well cementation and preparation method thereof Download PDFInfo
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- CN111205051A CN111205051A CN202010013274.XA CN202010013274A CN111205051A CN 111205051 A CN111205051 A CN 111205051A CN 202010013274 A CN202010013274 A CN 202010013274A CN 111205051 A CN111205051 A CN 111205051A
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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
- 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
- C04B28/10—Lime cements or magnesium oxide 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
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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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/0037—Materials containing oriented fillers or elements
- C04B2111/00379—Materials containing oriented fillers or elements the oriented elements being fibres
-
- 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
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/08—Fiber-containing well treatment fluids
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses oil well cement for well cementation. An oil well cement for well cementation comprises the following raw materials in parts by weight: 41-43 parts of calcium oxide, 39-41 parts of silicon dioxide, 9-12 parts of aluminum oxide, 7-9 parts of magnesium oxide, 0.5-0.7 part of ferric oxide, 0.8-0.9 part of manganese oxide, 4-7 parts of sulfur oxide, 14-18 parts of fly ash, 3-5 parts of silica fume, 2-5 parts of polyoxyethylene phosphonate, 1-2 parts of fiber A, 1-2 parts of fiber B and 1-2 parts of fiber C. The invention also discloses a preparation method of the oil well cement for well cementation. The oil well cement of the invention has good compatibility with drilling mud, good formation quality and particularly good strength.
Description
Technical Field
The invention relates to the technical field of cement, in particular to oil well cement for well cementation and a preparation method thereof.
Background
At present, the process is more and more advanced in oil exploitation, and the traditional process for exploiting oil is complex, and firstly, a well is drilled on the ground to the depth of hundreds of meters to thousands of meters, and then a steel casing pipe is inserted into a well hole. In order to tightly combine the casing and the stratum into a whole, oil well cement is always used as a cementing material in the industry for well cementation construction, so that the functions of supporting the casing and packing the stratum are achieved, and then perforation is carried out on oil-containing geological positions at different depths to achieve oil exploitation. Due to different geological conditions, the difference of physicochemical parameters such as underground pressure, temperature, underground rock stratum acidity and alkalinity, underground water and the like is large, so the difficulty is large when the well cementation quality is ensured to reach the high-quality standard. Although some effect has been achieved for a long time by oilfield technicians to improve oil well cement properties by adjusting cement slurry formulations and using new additives, the performance parameters are often considered, and no ideal method has been found.
At present, G-grade oil well cement is mainly used in oil field well cementation construction, and cement stones formed after the cement stones are solidified often have the following problems under complex bottom hole conditions:
①, the compatibility with the drilling mud is not good, the well cementation quality is affected, the well cementation construction is that the cement slurry is injected into the annular space between the casing and the well wall, the stratum and the outer wall of the casing are inevitably attached with the mud left in the well drilling process, which can seriously affect the cementation strength of the cement stone and the stratum and the two interfaces of the cement stone and the casing.
②, the later strength decline problem of the set cement is prominent, and the negative effect on the strength of the set cement is particularly serious for a deep well with the depth of thousands of meters, because the temperature and the pressure in the well are increased along with the increase of the depth.
③, the tiny cracks generated by the deformation of the cement paste and the casing under high temperature and high pressure seriously affect the cementing quality of the stratum and the casing.
④ in the deep zone of oil well, oil and gas are active, and the cement stone is corroded seriously by sulfate and loses strength, which is also the frequent occurrence of corrosive media.
⑤, the underground cement stone is overlapped by the stress wave generated by perforation, forming high pressure stress area in the cement ring, causing the internal fracture of the cement ring or the separation of the cementing interface, resulting in the comprehensive destruction of the cement ring, if the influence is applied to the periphery of the production section, the adjacent oil and water layers cause mutual channeling, thus failing to achieve the purpose of separate production, in addition, the stimulation measures such as acid fracturing can further enlarge and extend the cracks, even leading the packing effect of the cement ring at a certain section to completely fail, thus bringing great economic loss to the oil exploration and development.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
To this end, it is an object of the present invention to propose a well cement for cementing and a method for its preparation that can solve the above mentioned problems.
According to the embodiment of the invention, the oil well cement for well cementation comprises the following raw materials in parts by weight: 41-43 parts of calcium oxide, 39-41 parts of silicon dioxide, 9-12 parts of aluminum oxide, 7-9 parts of magnesium oxide, 0.5-0.7 part of ferric oxide, 0.8-0.9 part of manganese oxide, 4-7 parts of sulfur oxide, 14-18 parts of fly ash, 3-5 parts of silica fume, 2-5 parts of polyoxyethylene phosphonate, 1-2 parts of fiber A, 1-2 parts of fiber B and 1-2 parts of fiber C.
Preferably, the fiber A is LC steel fiber and is in the form of a sheet with 30 fibers bonded together, the length of the sheet is 60mm, and the diameter of the sheet is 0.8 mm;
the fiber B is HC steel fiber and has high carbon content;
the fiber C is steel fiber, the fiber C is wavy fiber with a rectangular cross section, the length of the fiber C is 50mm, and the diameter of the fiber C is 0.4 mm.
Preferably, polyvinyl alcohol, polyacrylonitrile, high density polyethylene, aramid, or polypropylene staple fibers are also included.
Preferably, the feed also comprises the following raw materials in parts by weight: 0.7 parts polyvinyl alcohol, 0.7 parts polyacrylonitrile, 0.4 parts high density polyethylene, 0.1 parts aramid, or 0.2 parts polypropylene staple fiber.
The preparation method of the oil well cement for well cementation according to the embodiment of the invention comprises the following steps:
step one, introducing 41-43 parts of calcium oxide, 39-41 parts of silicon dioxide, 9-12 parts of aluminum oxide, 7-9 parts of magnesium oxide, 0.5-0.7 part of ferric oxide, 0.8-0.9 part of manganese oxide, 4-7 parts of sulfur oxide and 14-18 parts of fly ash into a stirrer, introducing wetting water for 30 seconds, stirring wet raw materials for 30 seconds, and standing for 4 minutes;
step two, introducing 3-5 parts of silica fume and 2-5 parts of polyoxyethylated phosphonate into a stirrer for 30 seconds, and stirring for 1 minute;
step three, introducing one half of 1-2 parts of fiber A, 1-2 parts of fiber B and 1-2 parts of fiber C into a stirrer, and stirring for 30 seconds;
step four, introducing the other half of the 1-2 parts of the fiber A, the 1-2 parts of the fiber B and the 1-2 parts of the fiber C into a stirrer, and stirring for 1 minute;
and step five, filling the cement obtained in the step four for later use.
Preferably, the method further comprises the step of adding polyvinyl alcohol, polypropylene nitrile, high density polyethylene, aramid or polypropylene short fiber between the second step and the third step and stirring for 2 minutes.
Preferably, the polyvinyl alcohol, polyacrylonitrile, high-density polyethylene, aramid, or polypropylene short fiber is in a proportion of 0.7 parts of polyvinyl alcohol, 0.6 parts of polyacrylonitrile, 0.1 parts of high-density polyethylene, 0.3 parts of aramid, or 0.1 parts of polypropylene short fiber.
The oil well cement of the invention has good compatibility with drilling mud, good formation quality and particularly good strength.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
The following describes embodiments of the present invention in detail.
The invention relates to an oil well cement for well cementation, which comprises the following raw materials in parts by weight: 41-43 parts of calcium oxide, 39-41 parts of silicon dioxide, 9-12 parts of aluminum oxide, 7-9 parts of magnesium oxide, 0.5-0.7 part of ferric oxide, 0.8-0.9 part of manganese oxide, 4-7 parts of sulfur oxide, 14-18 parts of fly ash, 3-5 parts of silica fume, 2-5 parts of polyoxyethylene phosphonate, 1-2 parts of fiber A, 1-2 parts of fiber B and 1-2 parts of fiber C.
Preferably, the fiber A is LC steel fiber and is in the form of a sheet with 30 fibers bonded together, the length of the sheet is 60mm, and the diameter of the sheet is 0.8 mm;
the fiber B is HC steel fiber and has high carbon content;
the fiber C is steel fiber, the fiber C is wavy fiber with a rectangular cross section, the length of the fiber C is 50mm, and the diameter of the fiber C is 0.4 mm.
Preferably, polyvinyl alcohol, polyacrylonitrile, high density polyethylene, aramid, or polypropylene staple fibers are also included.
Preferably, the feed also comprises the following raw materials in parts by weight: 0.7 parts polyvinyl alcohol, 0.7 parts polyacrylonitrile, 0.4 parts high density polyethylene, 0.1 parts aramid, or 0.2 parts polypropylene staple fiber.
The preparation method of the oil well cement for well cementation according to the embodiment of the invention comprises the following steps:
step one, introducing 41-43 parts of calcium oxide, 39-41 parts of silicon dioxide, 9-12 parts of aluminum oxide, 7-9 parts of magnesium oxide, 0.5-0.7 part of ferric oxide, 0.8-0.9 part of manganese oxide, 4-7 parts of sulfur oxide and 14-18 parts of fly ash into a stirrer, introducing wetting water for 30 seconds, stirring the wet raw materials for 30 seconds, and standing for 4 minutes;
step two, introducing 3-5 parts of silica fume and 2-5 parts of polyoxyethylated phosphonate into a stirrer for 30 seconds, and stirring for 1 minute;
step three, introducing one half of 1-2 parts of fiber A, 1-2 parts of fiber B and 1-2 parts of fiber C into a stirrer, and stirring for 30 seconds;
step four, introducing the other half of the 1-2 parts of the fiber A, the 1-2 parts of the fiber B and the 1-2 parts of the fiber C into a stirrer, and stirring for 1 minute;
and step five, filling the cement obtained in the step four for later use.
Preferably, the method further comprises the step of adding polyvinyl alcohol, polypropylene nitrile, high density polyethylene, aramid or polypropylene short fiber between the second step and the third step and stirring for 2 minutes.
Preferably, the polyvinyl alcohol, polyacrylonitrile, high-density polyethylene, aramid, or polypropylene short fiber is in a proportion of 0.7 parts of polyvinyl alcohol, 0.6 parts of polyacrylonitrile, 0.1 parts of high-density polyethylene, 0.3 parts of aramid, or 0.1 parts of polypropylene short fiber.
The first embodiment;
the preparation method of the oil well cement for well cementation according to the embodiment of the invention comprises the following steps:
step one, 41 parts of calcium oxide, 39 parts of silicon dioxide, 9 parts of aluminum oxide, 7 parts of magnesium oxide, 0.5 part of ferric oxide, 0.8 part of manganese oxide, 4 parts of sulfur oxide and 14 parts of fly ash in the raw material of the claim 1 are introduced into a stirrer, moist water is introduced for 30 seconds, the wet raw material is stirred for 30 seconds, and the raw material is kept still for 4 minutes;
step two, 3 parts of silica fume and 2 parts of polyoxyethylated phosphonate are introduced into a stirrer within 30 seconds and stirred for 1 minute;
step three, introducing one half of 1 part of fiber A, 1 part of fiber B and 1 part of fiber C into a stirrer, and stirring for 30 seconds;
step four, introducing the other half of 1 part of fiber A, 1 part of fiber B and 1 part of fiber C into a stirring machine, and stirring for 1 minute;
and step five, filling the cement obtained in the step four for later use.
Example two:
the preparation method of the oil well cement for well cementation according to the embodiment of the invention comprises the following steps:
step one, introducing 42 parts of calcium oxide, 40 parts of silicon dioxide, 10 parts of aluminum oxide, 8 parts of magnesium oxide, 0.6 part of ferric oxide, 0.8 part of manganese oxide, 5 parts of sulfur oxide and 16 parts of fly ash into a stirrer, introducing wetting water for 30 seconds, stirring the wet raw materials for 30 seconds, and standing for 4 minutes;
step two, 5 parts of silica fume and 4 parts of polyoxyethylated phosphonate are introduced into a stirrer within 30 seconds and stirred for 1 minute;
step three, introducing one half of 2 parts of fiber A, 2 parts of fiber B and 2 parts of fiber C into a stirrer, and stirring for 30 seconds;
step four, introducing the other half of 2 parts of fiber A, 2 parts of fiber B and 2 parts of fiber C into a stirring machine, and stirring for 1 minute;
and step five, filling the cement obtained in the step four for later use.
Example three:
the preparation method of the oil well cement for well cementation according to the embodiment of the invention comprises the following steps:
introducing 43 parts of calcium oxide, 41 parts of silicon dioxide, 12 parts of aluminum oxide, 9 parts of magnesium oxide, 0.7 part of ferric oxide, 0.9 part of manganese oxide, 7 parts of sulfur oxide and 18 parts of fly ash into a stirrer, introducing humid water for 30 seconds, stirring the humid raw materials for 30 seconds, and standing for 4 minutes;
step two, 5 parts of silica fume and 5 parts of polyoxyethylated phosphonate are introduced into a stirrer within 30 seconds and stirred for 1 minute;
step three, introducing one half of 1.5 parts of fiber A, 1.5 parts of fiber B and 1.5 parts of fiber C into a stirrer, and stirring for 30 seconds;
step four, introducing the other half of the 1.5 parts of the fiber A, the 1.5 parts of the fiber B and the 1.5 parts of the fiber C into a stirrer, and stirring for 1 minute;
and step five, filling the cement obtained in the step four for later use.
The oil well cement prepared by the embodiment has good compatibility with drilling mud, good formation quality and particularly good strength.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (7)
1. The oil well cement for well cementation is characterized by comprising the following raw materials in parts by weight: 41-43 parts of calcium oxide, 39-41 parts of silicon dioxide, 9-12 parts of aluminum oxide, 7-9 parts of magnesium oxide, 0.5-0.7 part of ferric oxide, 0.8-0.9 part of manganese oxide, 4-7 parts of sulfur oxide, 14-18 parts of fly ash, 3-5 parts of silica fume, 2-5 parts of polyoxyethylene phosphonate, 1-2 parts of fiber A, 1-2 parts of fiber B and 1-2 parts of fiber C.
2. An oil well cement for cementing of a well as defined in claim 1, characterized in that said fibers a are LC steel fibers in the form of sheets of 30 fibers bonded together, 60mm in length and 0.8mm in diameter;
the fiber B is HC steel fiber and has high carbon content;
the fiber C is steel fiber, the fiber C is wavy fiber with a rectangular cross section, the length of the fiber C is 50mm, and the diameter of the fiber C is 0.4 mm.
3. An oil well cement for cementing of a well as recited by claim 1 further comprising polyvinyl alcohol, polyacrylonitrile, high density polyethylene, aramid and polypropylene staple fibers.
4. An oil well cement for cementing of a well as recited in claim 3 further comprising the following raw materials in parts by weight: 0.7 parts polyvinyl alcohol, 0.7 parts polyacrylonitrile, 0.4 parts high density polyethylene, 0.1 parts aramid, or 0.2 parts polypropylene staple fiber.
5. A method of preparing oil well cement for cementing a well, comprising the steps of:
step one, introducing 41-43 parts of calcium oxide, 39-41 parts of silicon dioxide, 9-12 parts of aluminum oxide, 7-9 parts of magnesium oxide, 0.5-0.7 part of ferric oxide, 0.8-0.9 part of manganese oxide, 4-7 parts of sulfur oxide and 14-18 parts of fly ash in the raw material of the claim 1 into a stirrer, introducing moist water for 30 seconds, stirring the moist raw material for 30 seconds, and standing for 4 minutes;
step two, 3-5 parts of silica fume and 2-5 parts of polyoxyethylated phosphonate in the claim 1 are introduced into a stirrer within 30 seconds and stirred for 1 minute;
step three, introducing one half of the fiber A in the amount of 1-2 parts, the fiber B in the amount of 1-2 parts and the fiber C in the amount of 1-2 parts into a stirrer, and stirring for 30 seconds;
step four, introducing the other half of the fiber A in the claim 1, 1-2 parts of the fiber B and 1-2 parts of the fiber C into a stirrer, and stirring for 1 minute;
and step five, filling the cement obtained in the step four for later use.
6. The method of claim 5, further comprising the step of adding polyvinyl alcohol, polyacrylonitrile, high density polyethylene, aramid or polypropylene short fiber between the second and third steps and stirring for 2 minutes.
7. A method of preparing an oil well cement for well cementation according to claim 6 characterized in that the proportion of polyvinyl alcohol, polyacrylonitrile, high density polyethylene, aramid or polypropylene short fiber is 0.7 parts polyvinyl alcohol, 0.6 parts polyacrylonitrile, 0.1 parts high density polyethylene, 0.3 parts aramid or 0.1 parts polypropylene short fiber.
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| CN202010013274.XA CN111205051A (en) | 2020-01-07 | 2020-01-07 | Oil well cement for well cementation and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010013274.XA CN111205051A (en) | 2020-01-07 | 2020-01-07 | Oil well cement for well cementation and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115893919A (en) * | 2021-08-18 | 2023-04-04 | 中国石油化工股份有限公司 | Oil well cement slurry system, preparation method thereof and application thereof in well cementation without metal casing |
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| CN104710120A (en) * | 2014-11-30 | 2015-06-17 | 保定保兴油田固井材料制造有限公司 | BFS oil well cement |
| CN106278003A (en) * | 2015-06-10 | 2017-01-04 | 嘉华特种水泥股份有限公司 | A kind of toughness oil-well cement |
| WO2018057546A1 (en) * | 2016-09-20 | 2018-03-29 | Saudi Arabian Oil Company | Cement having cross-linked polymers |
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2020
- 2020-01-07 CN CN202010013274.XA patent/CN111205051A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104710120A (en) * | 2014-11-30 | 2015-06-17 | 保定保兴油田固井材料制造有限公司 | BFS oil well cement |
| CN106278003A (en) * | 2015-06-10 | 2017-01-04 | 嘉华特种水泥股份有限公司 | A kind of toughness oil-well cement |
| WO2018057546A1 (en) * | 2016-09-20 | 2018-03-29 | Saudi Arabian Oil Company | Cement having cross-linked polymers |
Non-Patent Citations (2)
| Title |
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| 孙延宗 等主编: "《岩巷工程施工：支护工程》", 31 July 2011, 冶金工业出版社 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115893919A (en) * | 2021-08-18 | 2023-04-04 | 中国石油化工股份有限公司 | Oil well cement slurry system, preparation method thereof and application thereof in well cementation without metal casing |
| CN115893919B (en) * | 2021-08-18 | 2024-04-16 | 中国石油化工股份有限公司 | Oil well cement paste system, preparation method thereof and application thereof in well cementation without metal casing |
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Application publication date: 20200529 |