CN111943550A - Retarder for micro-expansion long-sealing-section well cementation - Google Patents
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- CN111943550A CN111943550A CN202010653665.8A CN202010653665A CN111943550A CN 111943550 A CN111943550 A CN 111943550A CN 202010653665 A CN202010653665 A CN 202010653665A CN 111943550 A CN111943550 A CN 111943550A
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/161—Macromolecular compounds comprising sulfonate or sulfate groups
- C04B24/166—Macromolecular compounds comprising sulfonate or sulfate groups obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/287—Polyamides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/58—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine
- C08F220/585—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine and containing other heteroatoms, e.g. 2-acrylamido-2-methylpropane sulfonic acid [AMPS]
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/20—Retarders
- C04B2103/22—Set retarders
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Abstract
The invention relates to a retarder for micro-expansion long-sealing section well cementation. The technical scheme comprises the following steps: 1) adding 75 parts of water into a jacket kettle, then sequentially adding 9 parts of sodium hydroxyethylidene diphosphonate and 1 part of citric acid, and stirring until the sodium hydroxyethylidene diphosphonate and the citric acid are dissolved; 2) and adding 15 parts of ammonium sulfate into the kettle body, and stirring until the ammonium sulfate is dissolved to obtain the product. The novel micro-expansion long-sealing section retarder is particularly suitable for cementing a shale gas production layer, and has the functions of three additives, so that the contradiction influence among the three additives is eliminated, and the on-site use is more convenient and economical.
Description
Technical Field
The invention relates to a retarder for petroleum well cementation, in particular to a retarder for micro-expansion long-sealing section well cementation.
Background
In recent years, shale gas exploitation is a major trend of world oil and gas resource development, but shale gas wells have long horizontal sections and need staged fracturing in the later period, which determines that a well cementing and sealing section of a producing zone is longer in the structural design of a well body and has high requirements on the well cementing quality of the producing zone. As is well known, the difficulties of long cementing section are mainly as follows: firstly, under the condition of high circulating temperature (generally higher than 100 ℃), how to ensure the rapid (generally requiring the strength development time to be about 72h) strength development of the cement column at the low top temperature (generally close to 40 ℃) section; and how to reduce the micro-gap generated by the shrinkage of the system in the strength development process of the set cement.
Usually, in order to ensure the pumpable time during well cementation, a retarder (delay of thickening time) needs to be added; in order to accelerate the strength development of the cement paste, a coagulant is required to be added; in order to prevent the cement paste from shrinking during the strength development process, a swelling agent needs to be added. The expanding agent widely used at present mainly comprises two types, one is a gas generating expanding agent, the main component is metal powder such as aluminum powder and the like, and the principle is that hydrogen is generated in an alkaline environment of the aluminum powder and cement paste (the cement paste is hydrated to generate a large amount of calcium hydroxide) to generate expansion; the other is a lattice expanding agent, the main component of which is metal oxide such as magnesium oxide, and the principle is that magnesium oxide generates chemical reaction in the hydration environment (high-temperature alkaline environment) of cement slurry to generate magnesium hydroxide, and then generates expansion. However, the addition of setting accelerators and lattice expanding agents reduces the thickening time to some extent, and the addition of various additives increases the cost.
Therefore, the retarder for micro-expansion long-sealing section well cementation is designed, and the technical problem of shale gas production layer well cementation can be perfectly solved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a retarder for micro-expansion long-sealing section well cementation, which combines the functions of the three additives into a whole, achieves the using effects of the three additives by using a novel additive, is more economical and convenient to use, and eliminates the mutual influence among the three additives.
The invention provides a retarder for micro-expansion long-sealing section well cementation, which adopts the technical scheme that the retarder comprises the following steps:
1) adding 75 parts of water into a jacket kettle, then sequentially adding 9 parts of sodium hydroxyethylidene diphosphonate and 1 part of citric acid, and stirring until the sodium hydroxyethylidene diphosphonate and the citric acid are dissolved;
2) and adding 15 parts of ammonium sulfate into the kettle body, and stirring until the ammonium sulfate is dissolved to obtain the product.
The invention provides a retarder for micro-expansion long-sealing section well cementation, which adopts the technical scheme that the retarder comprises the following steps:
1) adding 71 parts of water into a jacketed kettle, then sequentially adding 21 parts of 2-acrylamide-2-methylpropanesulfonic acid and 7 parts of itaconic acid, stirring until the mixture is dissolved, adding sodium hydroxide, and adjusting the pH to 2.0;
2) adding 0.85 part of molecular weight distribution control agent into the reaction solution, then adding 0.15 part of initiator, controlling the reaction temperature at 40 +/-2.0 ℃, and reacting for 7 hours;
2) after the reaction is finished, adding 10 parts of ammonium bisulfate into the kettle body again, and stirring until the ammonium bisulfate is dissolved to obtain the product.
The invention provides a retarder for micro-expansion long-sealing section well cementation, which adopts the technical scheme that the retarder comprises the following steps:
1) adding 71 parts of water into a jacketed kettle, then sequentially adding 16 parts of 2-acrylamide-2-methylpropanesulfonic acid, 8 parts of itaconic acid and 4 parts of acrylic acid, stirring until the materials are dissolved, adding sodium hydroxide, and adjusting the pH to 2.0;
2) adding 0.88 part of molecular weight distribution control agent into the reaction solution, then adding 0.12 part of initiator, controlling the reaction temperature at 40 +/-2.0 ℃, and reacting for 7 hours;
3) after the reaction is finished, adding 10 parts of ammonium chloride into the kettle body again, and stirring until the ammonium chloride is dissolved to obtain the product.
The invention has the beneficial effects that: the novel micro-expansion long-sealing section retarder is particularly suitable for cementing a shale gas production layer, and has the functions of three additives (the retarder, the expanding agent and the early strength agent), so that the contradiction influence among the three additives is eliminated, and the on-site use is more convenient and economical.
Drawings
FIG. 1 is a thickening curve (98 ℃ C.. times.40 MPa. times.50 min) of example 1 of the present invention;
FIG. 2 is a thickening curve (104 ℃ C.. times.50 MPa. times.50 min) of example 1 of the present invention;
FIG. 3 is a thickening curve (110 ℃ C.. times.50 MPa. times.50 min) of example 1 of the present invention;
FIG. 4 is a photograph of an expanded ring obtained in example 1 of the present invention (110 ℃ C. times.20.7 MPaMPa times.72 h)
FIG. 5 shows the thickening curve (115 ℃ C.. times.50 MPa. times.50 min.) according to example 2 of the invention
FIG. 6 shows the thickening curve (125 ℃ C.. times.50 MPa. times.50 min.) according to example 2 of the invention
FIG. 7 shows the thickening curve (115 ℃ C.. times.50 MPa. times.50 min.) according to example 3 of the invention
FIG. 8 is a thickening curve (125 ℃ C.. times.50 MPa. times.50 min) of example 3 according to the invention.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Example 1: the method for compounding the sodium hydroxyethylidene diphosphonate with the ammonium sulfate comprises the following steps:
1) adding 75 parts of water into a jacket kettle, then sequentially adding 9 parts of sodium hydroxyethylidene diphosphonate and 1 part of citric acid, and stirring until the sodium hydroxyethylidene diphosphonate and the citric acid are dissolved;
2) adding 15 parts of ammonium sulfate into the kettle body, and stirring until the ammonium sulfate is dissolved to obtain a product, namely the retarder-1;
and (3) performance testing:
TABLE 1 Cement paste formulations
Preparing cement paste according to a method recommended by the national standard GB/T19139, and testing the density, thickening time and strength; the swelling rate was tested according to the method of API Standard API 10B-5.
TABLE 2 Cement paste Properties
As can be seen from the figures 1, 2 and 3, the cement slurry thickening curve added with the novel retarder-1 is normal, the transitional thickening time is short, the linear relation between the thickening time and the temperature is good, the strength development is fast, and the requirements of well cementation design on the cement slurry are met. As can be seen from FIG. 4, the cement slurry added with the novel retarder-1 has an obvious expansion effect, and the expansion rate reaches 0.3%. The micro-expansion has very obvious inhibiting effect on the generation of micro-cracks and gas channeling, is very favorable for improving the well cementation quality and prolonging the service life of an oil-gas well.
Example 2: the binary copolymer compound ammonium bisulfate comprises the following steps:
1) adding 71 parts of water into a jacketed kettle, then sequentially adding 21 parts of AMPS and 7 parts of itaconic acid, stirring until the AMPS and the itaconic acid are dissolved, adding sodium hydroxide, and adjusting the pH to 2.0;
2) adding 0.85 part of molecular weight distribution control agent into the reaction solution, then adding 0.15 part of initiator, controlling the reaction temperature at 40 +/-2.0 ℃, and reacting for 7 hours;
2) after the reaction is finished, adding 10 parts of ammonium bisulfate into the kettle body again, and stirring until the ammonium bisulfate is dissolved to obtain a novel product retarder-2;
and (3) performance testing:
TABLE 3 Cement paste formulation (115 deg.C)
TABLE 4 Cement paste formulation (125 deg.C)
Preparing cement paste according to a method recommended by the national standard GB/T19139, and testing the density, thickening time and strength; the swelling rate was tested according to the method of API Standard API 10B-5.
TABLE 5 Cement paste Properties
As can be seen from Table 5, the cement slurry added with the novel retarder-2 has a normal thickening curve at high temperature (detailed in figures 5 and 6), short transitional thickening time, fast strength development under large temperature difference, obvious micro-expansion effect and very suitable comprehensive slurry performance for shale gas long-seal-fixing-section well cementation.
Example 3: the terpolymer is compounded with ammonium chloride, and the steps are as follows:
3) adding 71 parts of water into a jacketed kettle, then sequentially adding 16 parts of AMPS, 8 parts of itaconic acid and 4 parts of acrylic acid, stirring until the materials are dissolved, adding sodium hydroxide, and adjusting the pH value to 2.0;
4) adding 0.88 part of molecular weight distribution control agent into the reaction solution, then adding 0.12 part of initiator, controlling the reaction temperature at 40 +/-2.0 ℃, and reacting for 7 hours;
2) after the reaction is finished, adding 10 parts of ammonium chloride into the kettle body again, and stirring until the ammonium chloride is dissolved to obtain a novel product retarder-3;
and (3) performance testing:
TABLE 6 grout recipe (115 deg.C)
TABLE 7 Cement paste formulation (125 deg.C)
Preparing cement paste according to a method recommended by the national standard GB/T19139, and testing the density, thickening time and strength; the swelling rate was tested according to the method of API Standard API 10B-5.
TABLE 8 Cement paste Properties
As can be seen from Table 8, the cement slurry added with the novel retarder-3 has good retarding effect at high temperature, normal thickening curve (detailed in figures 7 and 8), short transition thickening time, fast strength development under large temperature difference, obvious micro-expansion effect and very suitable comprehensive slurry performance for long-sealing-section well cementation.
The above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (3)
1. A retarder for micro-expansion long-sealing section well cementation is characterized by comprising the following steps:
1) adding 75 parts of water into a jacket kettle, then sequentially adding 9 parts of sodium hydroxyethylidene diphosphonate and 1 part of citric acid, and stirring until the sodium hydroxyethylidene diphosphonate and the citric acid are dissolved;
2) and adding 15 parts of ammonium sulfate into the kettle body, and stirring until the ammonium sulfate is dissolved to obtain the product.
2. A retarder for micro-expansion long-sealing section well cementation is characterized by comprising the following steps:
1) adding 71 parts of water into a jacketed kettle, then sequentially adding 21 parts of 2-acrylamide-2-methylpropanesulfonic acid and 7 parts of itaconic acid, stirring until the mixture is dissolved, adding sodium hydroxide, and adjusting the pH to 2.0;
2) adding 0.85 part of molecular weight distribution control agent into the reaction solution, then adding 0.15 part of initiator, controlling the reaction temperature at 40 +/-2.0 ℃, and reacting for 7 hours;
2) after the reaction is finished, adding 10 parts of ammonium bisulfate into the kettle body again, and stirring until the ammonium bisulfate is dissolved to obtain the product.
3. A retarder for micro-expansion long-sealing section well cementation is characterized by comprising the following steps:
1) adding 71 parts of water into a jacketed kettle, then sequentially adding 16 parts of 2-acrylamide-2-methylpropanesulfonic acid, 8 parts of itaconic acid and 4 parts of acrylic acid, stirring until the materials are dissolved, adding sodium hydroxide, and adjusting the pH to 2.0;
2) adding 0.88 part of molecular weight distribution control agent into the reaction solution, then adding 0.12 part of initiator, controlling the reaction temperature at 40 +/-2.0 ℃, and reacting for 7 hours;
3) after the reaction is finished, adding 10 parts of ammonium chloride into the kettle body again, and stirring until the ammonium chloride is dissolved to obtain the product.
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| CN202010653665.8A CN111943550A (en) | 2020-07-08 | 2020-07-08 | Retarder for micro-expansion long-sealing-section well cementation |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935181A (en) * | 2010-08-12 | 2011-01-05 | 天津中油渤星工程科技有限公司 | Intermediate temperature retarder in oil well cement |
| CN102351986A (en) * | 2011-07-28 | 2012-02-15 | 中国石油集团川庆钻探工程有限公司 | Method for preparing binary copolymer retarder for oil and gas well cementing |
| CN104650836A (en) * | 2014-12-22 | 2015-05-27 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Horizontal well cement paste |
| CN106007545A (en) * | 2016-06-06 | 2016-10-12 | 中国石油集团长城钻探工程有限公司固井公司 | Cement slurry with long-term-integrity cement sheath for heavy-oil thermal-recovery well and preparation method thereof |
| CN108059401A (en) * | 2018-01-26 | 2018-05-22 | 毕言铎 | A kind of low-density oil-well cement |
| CN109503760A (en) * | 2017-09-14 | 2019-03-22 | 中石化石油工程技术服务有限公司 | A kind of high temperature oil well cement retarder, preparation method and application |
-
2020
- 2020-07-08 CN CN202010653665.8A patent/CN111943550A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935181A (en) * | 2010-08-12 | 2011-01-05 | 天津中油渤星工程科技有限公司 | Intermediate temperature retarder in oil well cement |
| CN102351986A (en) * | 2011-07-28 | 2012-02-15 | 中国石油集团川庆钻探工程有限公司 | Method for preparing binary copolymer retarder for oil and gas well cementing |
| CN104650836A (en) * | 2014-12-22 | 2015-05-27 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Horizontal well cement paste |
| CN106007545A (en) * | 2016-06-06 | 2016-10-12 | 中国石油集团长城钻探工程有限公司固井公司 | Cement slurry with long-term-integrity cement sheath for heavy-oil thermal-recovery well and preparation method thereof |
| CN109503760A (en) * | 2017-09-14 | 2019-03-22 | 中石化石油工程技术服务有限公司 | A kind of high temperature oil well cement retarder, preparation method and application |
| CN108059401A (en) * | 2018-01-26 | 2018-05-22 | 毕言铎 | A kind of low-density oil-well cement |
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Application publication date: 20201117 |