CN111808598B - Clay anti-swelling agent - Google Patents
Clay anti-swelling agent Download PDFInfo
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- CN111808598B CN111808598B CN202010867993.8A CN202010867993A CN111808598B CN 111808598 B CN111808598 B CN 111808598B CN 202010867993 A CN202010867993 A CN 202010867993A CN 111808598 B CN111808598 B CN 111808598B
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/04—Preparation of compounds containing amino groups bound to a carbon skeleton by substitution of functional groups by amino groups
- C07C209/06—Preparation of compounds containing amino groups bound to a carbon skeleton by substitution of functional groups by amino groups by substitution of halogen atoms
- C07C209/12—Preparation of compounds containing amino groups bound to a carbon skeleton by substitution of functional groups by amino groups by substitution of halogen atoms with formation of quaternary ammonium compounds
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C211/00—Compounds containing amino groups bound to a carbon skeleton
- C07C211/62—Quaternary ammonium compounds
- C07C211/63—Quaternary ammonium compounds having quaternised nitrogen atoms bound to acyclic carbon atoms
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
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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
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a clay anti-swelling agent which is characterized in that a series of cationic compounds similar to the pore size of clay are prepared according to the diversity of the pore size of the clay, the series of cationic compounds are prepared by reacting trimethylamine or tetramethylethylenediamine and 1, 2-dichloroethane (or benzyl chloride and monochloroethane) as reaction raw materials in a high-pressure reaction kettle of 1-2 MPa at 120-180 ℃ for 7-8 h, and a prepared mixture is the anti-swelling agent which can adsorb and block the pores of the clay more comprehensively. Meanwhile, the resistance to moisture can be further strengthened by adjusting the polarity of the series of cationic compounds, so that the effect of continuous anti-swelling is achieved.
Description
Technical Field
The invention belongs to the field of oilfield chemicals, and particularly relates to a clay anti-swelling agent.
Background
Clay is a common mineral in formation rock, and because clay has the property of swelling when meeting water, during the process of water injection or fracturing of an oil field, the gaps in a reservoir rich in clay are reduced due to the swelling of clay, and the holes are largely blocked, so that water-sensitive damage is caused. To reduce such reservoir damage, clay anti-swelling agents are widely used. Theoretically, the metal cations can inhibit the clay swelling, however, in the practical application process, different cations have various defects, such as too high sodium ion use concentration, short aluminum ion duration time and the like. At present, most of the anti-swelling agents used in large quantities are potassium ions and ammonium ions, and the fundamental reason is that the diameters of the two ions are equivalent to the structural pores of the clay, the combination is firm, and the invasion of water molecules can be effectively resisted. However, since clay itself is a complex mixture and the structural pores of clay vary within a certain range, the adhesion of potassium ions or ammonium ions in different structural pores can be differentiated even in the same clay sample. In order to improve the effect of the anti-swelling agent, a plurality of polymer anti-swelling agents, particularly cationic polymers, are generated, and the effect of the anti-swelling agent is improved by utilizing the adsorption effect of the polymers while providing positive charges. However, the anti-swelling effect of the polymer is still not satisfactory due to the wide molecular weight distribution of the polymer itself and the cost.
The invention prepares the clay anti-swelling agent from the diversity of the pore size of the clay in a certain range, namely the pore diameter of the clay is not a fixed value, and the anti-swelling agent contains a series of cationic compounds with the pore size similar to that of the clay, so that the pores can be adsorbed and blocked more comprehensively. Meanwhile, the polarity of the surface group of the cation is adjusted, so that the resistance to moisture is further enhanced, and the effect of continuous anti-swelling is achieved.
Disclosure of Invention
A first aspect of the present invention aims to provide a clay anti-swelling agent to overcome the problem of clay swelling.
The technical scheme adopted by the invention is as follows:
the clay anti-swelling agent is characterized by comprising a component A shown in a formula 1, a component B shown in a formula 2, and a component C shown in a formula 3 and a formula 4, wherein the mass ratio of the component A to the component B to the component C is 1-2: 1.
Preferably:
and uniformly mixing the component A, the component B and the component C according to the mass ratio of 1:1:1 to obtain the clay anti-swelling agent.
The component A is prepared by the following method:
dissolving trimethylamine and 1, 2-dichloroethane in acetonitrile solvent, wherein the molar ratio of the trimethylamine to the 1, 2-dichloroethane is 2:1, the content of acetonitrile serving as a solvent is 50 percent (mass concentration), the mixture is uniformly mixed and then put into a high-pressure reaction kettle with the pressure of 1-2 MPa, the reaction is carried out under the condition of nitrogen, and the reaction is carried out for 7-8 hours at the temperature of 120-180 ℃, so that the obtained product is the component A (the compound shown in the formula 1).
The reaction equation involved is as follows:
the component B is prepared by the following method:
dissolving tetramethylethylenediamine and benzyl chloride in acetonitrile solvent, wherein the molar ratio of the tetramethylethylenediamine to the benzyl chloride is 1: and 2, uniformly mixing the acetonitrile solvent with the content of 50 percent (mass concentration), putting the mixture into a high-pressure reaction kettle with the pressure of 1-2 MPa, reacting under the condition of nitrogen, and reacting for 7-8 hours at the temperature of 120-180 ℃ to obtain the product, namely the component B (the compound shown in the formula 2).
The reaction equation involved is as follows:
the component C is prepared by the following method:
dissolving trimethylamine, benzyl chloride and monochloroethane in the solvent acetonitrile, wherein the molar ratio of the trimethylamine, the benzyl chloride and the monochloroethane is 1:1:1, the content of acetonitrile serving as a solvent is 50% (mass concentration), the mixture is uniformly mixed and then put into a high-pressure reaction kettle with the pressure of 1-2 MPa, the reaction is carried out under the condition of nitrogen, the reaction is carried out for 7-8 h at the temperature of 120-180 ℃, and the obtained product is the component C (the compound of the formula 3 and the compound of the formula 4).
The reaction equation involved is as follows:
the clay anti-swelling agent prepared by the invention has the best anti-swelling effect when the using concentration is 1.0-1.5% (mass concentration), and the preferable concentration is 1%.
The clay anti-swelling agent has the following advantages:
aiming at the diversity of the pore sizes of the clay, the anti-swelling agent prepared by the invention contains a series of cationic compounds with the pore sizes similar to those of the clay, and can more comprehensively adsorb and block the pores of the clay. Meanwhile, by adjusting the hydrophobic polarity of the series of cationic compounds, the compatibility with formation water and other additives is ensured, the water washing resistance of the anti-swelling agent is improved, and the resistance to water is further enhanced, so that the effect of continuous anti-swelling is achieved.
The present invention will be described in detail below with reference to specific examples.
Detailed Description
Example 1
Preparing A, B and C of the anti-swelling agent respectively:
trimethylamine (27.3g) and 1, 2-dichloroethane (22.7g) are dissolved in acetonitrile which is a solvent of 50g, the mixture is uniformly mixed and then put into a high-pressure reaction kettle with the pressure of 1MPa to react under the condition of nitrogen, and the reaction lasts for 8 hours at the temperature of 120 ℃, and the obtained product is the component A.
Dissolving tetramethylethylenediamine (15.8g) and benzyl chloride (34.2g) in acetonitrile (50 g) as solvent, mixing uniformly, loading into a high-pressure reaction kettle with the pressure of 2MPa, reacting under the condition of nitrogen, and reacting at 180 ℃ for 7h to obtain the component B.
Dissolving trimethylamine (19.0g), benzyl chloride (20.5g) and ethyl chloride (10.5g) in acetonitrile which is a solvent of 50g, uniformly mixing, then placing into a high-pressure reaction kettle with the pressure of 1MPa, reacting under the condition of nitrogen, and reacting for 8 hours at 120 ℃, wherein the obtained product is the component C.
And then evenly mixing the component A, B and the component C according to the mass ratio of 1:1:1 to obtain the anti-swelling agent.
Example 2
Preparing A, B and C of the anti-swelling agent respectively:
trimethylamine (27.3g) and 1, 2-dichloroethane (22.7g) are dissolved in acetonitrile which is a solvent of 50g, the mixture is uniformly mixed and then put into a high-pressure reaction kettle with the pressure of 2MPa for reaction under the condition of nitrogen, and the reaction lasts for 7 hours at 180 ℃, so that the obtained product is the component A.
Dissolving tetramethylethylenediamine (15.8g) and benzyl chloride (34.2g) in acetonitrile (50 g) as solvent, mixing uniformly, loading into a high-pressure reaction kettle with the pressure of 1MPa, reacting under the condition of nitrogen, and reacting at 120 ℃ for 8h to obtain the component B.
Dissolving trimethylamine (19.0g), benzyl chloride (20.5g) and ethyl chloride (10.5g) in acetonitrile which is a solvent of 50g, uniformly mixing, putting into a high-pressure reaction kettle with the pressure of 2MPa, reacting under the condition of nitrogen, and reacting for 7h at 180 ℃, wherein the obtained product is the component C.
And then evenly mixing the component A, B and the component C according to the mass ratio of 1:1:1 to obtain the anti-swelling agent.
Example 3
Preparing A, B and C according to the method of example 1, and then uniformly mixing A, B and C according to the mass ratio of 1:2:1 to obtain the anti-swelling agent.
Example 4
Preparing A, B and C according to the reaction of example 1, and then uniformly mixing A, B and C according to the mass ratio of 2:1:1 to obtain the anti-swelling agent.
Performance testing
The anti-swelling agent prepared in the above examples was subjected to anti-swelling rate, water washing resistance and compatibility measurement by the centrifugal method, which is the anti-swelling rate measurement in SY/T5971-2016 Performance evaluation method for Clay stabilizer for oil and gas field fracturing acidizing and Water flooding, and the experimental results are shown in tables 1 and 2.
TABLE 1 anti-swelling agent Performance test (use mass concentration 1.0%)
In table 1: the commercially available anti-swelling agent is selected from inorganic clay anti-swelling agents.
And (3) analysis:
as can be seen from Table 1, when the use concentration of the anti-swelling agent is 1.0%, the anti-swelling rate of the anti-swelling agent in the examples is up to 96%, the water washing resistance rate is up to 85%, and both the anti-swelling rate and the water washing resistance rate are superior to those of the commercially available anti-swelling agent. The reason for the analysis is: because the anti-swelling agent system contains a series of cationic compounds with the pore size similar to that of the clay, the clay pores can be more comprehensively adsorbed and blocked, the resistance to moisture is effectively improved, and the high anti-swelling effect can be realized.
TABLE 2 compatibility of anti-swelling agents
As can be seen from Table 2, the anti-swelling agent of the present invention has a compatibility with standard brine, formation water and auxiliary hydrochloric acid at concentrations of 0.5%, 1.0% and 2.0%.
Claims (5)
1. The clay anti-swelling agent is characterized by comprising a component A shown in a formula 1, a component B shown in a formula 2, and a component C shown in a formula 3 and a formula 4, wherein the mass ratio of the component A to the component B to the component C is 1-2: 1;
2. the clay anti-swelling agent according to claim 1, wherein: and uniformly mixing the component A, the component B and the component C according to the mass ratio of 1:1:1 to obtain the clay anti-swelling agent.
3. The clay anti-swelling agent according to claim 1, wherein: the component A is prepared by the following method: dissolving trimethylamine and 1, 2-dichloroethane in acetonitrile solvent, wherein the molar ratio of the trimethylamine to the 1, 2-dichloroethane is 2:1, the content of acetonitrile serving as a solvent is 50%, the mixture is uniformly mixed and then put into a high-pressure reaction kettle with the pressure of 1-2 MPa, the reaction is carried out under the condition of nitrogen, and the reaction is carried out for 7-8 hours at the temperature of 120-180 ℃, so that the obtained product is the component A.
4. The clay anti-swelling agent according to claim 1, wherein: the component B is prepared by the following method: dissolving tetramethylethylenediamine and benzyl chloride in acetonitrile solvent, wherein the molar ratio of the tetramethylethylenediamine to the benzyl chloride is 1: and 2, uniformly mixing the acetonitrile serving as a solvent with the content of 50%, putting the mixture into a high-pressure reaction kettle with the pressure of 1-2 MPa, reacting under the condition of nitrogen, and reacting at 120-180 ℃ for 7-8 hours to obtain a product, namely the component B.
5. The clay anti-swelling agent according to claim 1, wherein: the component C is prepared by the following method: dissolving trimethylamine, benzyl chloride and monochloroethane in the solvent acetonitrile, wherein the molar ratio of the trimethylamine, the benzyl chloride and the monochloroethane is 1:1:1, the content of acetonitrile serving as a solvent is 50%, the mixture is uniformly mixed and then put into a high-pressure reaction kettle with the pressure of 1-2 MPa, the reaction is carried out under the condition of nitrogen, the reaction is carried out for 7-8 hours at the temperature of 120-180 ℃, and the obtained product is the component C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010867993.8A CN111808598B (en) | 2020-08-26 | 2020-08-26 | Clay anti-swelling agent |
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| CN202010867993.8A CN111808598B (en) | 2020-08-26 | 2020-08-26 | Clay anti-swelling agent |
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| CN111808598B true CN111808598B (en) | 2022-05-20 |
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| CN113667467B (en) * | 2021-08-25 | 2022-09-02 | 卫辉市化工有限公司 | Clay expansion and contraction agent for oil field and preparation method thereof |
| CN115232016B (en) * | 2022-09-23 | 2022-12-20 | 江苏富淼科技股份有限公司 | Clay anti-swelling agent solution and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017132306A1 (en) * | 2016-01-26 | 2017-08-03 | Rhodia Operations | Clay stabilizing agents and methods of use |
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| CN101717339A (en) * | 2009-12-08 | 2010-06-02 | 江苏扬农化工集团有限公司 | Double quaternary ammonium base compound and preparation method as well as application thereof |
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Effective date of registration: 20230104 Address after: 343400 Yongxin Industrial Park (Maoping Industrial Park), Ji'an City, Jiangxi Province Patentee after: JIANGXI KENTE CHEMISTRY Co.,Ltd. Address before: 318000 Fuying Street modern industrial cluster, Xianju County, Taizhou City, Zhejiang Province Patentee before: KENTE CATALYSTS Inc. Patentee before: JIANGXI KENTE CHEMISTRY Co.,Ltd. |