CN109233758B - Salt-resistant lubricant for drilling fluid and preparation method thereof - Google Patents
Salt-resistant lubricant for drilling fluid and preparation method thereof Download PDFInfo
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- CN109233758B CN109233758B CN201811237896.XA CN201811237896A CN109233758B CN 109233758 B CN109233758 B CN 109233758B CN 201811237896 A CN201811237896 A CN 201811237896A CN 109233758 B CN109233758 B CN 109233758B
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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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
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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
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
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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
- C09K2208/34—Lubricant additives
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Abstract
The invention discloses an environment-friendly salt-resistant lubricant for drilling fluid, which has no influence on the viscosity performance of drilling well, and has no foaming and good high temperature resistance. The salt-resistant lubricant for the drilling fluid comprises the following components: dimethyl silicone oil, castor oil and alkylphenol polyoxyethylene; wherein the mass percentages of the components are as follows: 75-85% of dimethyl silicone oil, 11-18% of castor oil and 3-8% of alkylphenol ethoxylates. The preparation method comprises 1) sequentially adding simethicone and castor oil into a reaction kettle, heating to 45-55deg.C, stirring for 18-25min, and mixing; 2) Adding alkylphenol polyoxyethylene, stirring for 0.8-1.2h, circulating for 0.8-1.2h by a colloid mill, and cooling and discharging to obtain the salt-resistant lubricant for drilling fluid. By adopting the salt-resistant lubricant for the drilling fluid, the temperature resistance can reach 150 ℃, and meanwhile, in the drilling fluid with the calcium chloride concentration of 20 percent and the potassium chloride concentration of 5 percent, the mud cake adhesion coefficient is less than 0.05; and the preparation method is simple in process and low in preparation cost.
Description
Technical Field
The invention relates to a functional reagent for drilling fluid, in particular to a salt-resistant lubricant for drilling fluid and a preparation method thereof.
Background
It is well known that: the lubricant for the drilling fluid not only can improve the lubricating property of the drilling fluid and reduce the downhole friction resistance, but also can improve the rheological property and the filtration performance of the drilling fluid and improve the rock breaking efficiency. According to the phase state of the drilling fluid lubricant, the drilling fluid lubricant mainly comprises two types of liquid lubricants and solid lubricants.
The liquid type lubricants are the most widely studied and used lubricants at present, and mainly include asphalt type lubricants, diesel-based lubricants, mineral oil-based lubricants, vegetable oil-based lubricants, sulfonated tall oil lubricants, polymeric alcohol lubricants, synthetic ester lubricants, and the like. However, with the increasing strictness of environmental regulations, the use amount of conventional lubricants such as asphalt-based lubricants, diesel-based lubricants, mineral oil-based lubricants, etc. has been reduced year by year, and extreme pressure lubricants, environmental protection lubricants, and nano-lubricants have been increasingly paid attention.
The solid lubricant mainly comprises plastic pellets, graphite, carbon balls, glass beads and the like, and mainly changes sliding friction between the drilling tool and the well wall into rolling friction, so that the friction coefficient between the drilling tool and the well wall is effectively reduced.
In addition, foreign companies have made a great deal of research on synthesizing liquid environment-friendly lubricants such as esters, polyols and modified vegetable oils, but the above-mentioned partial lubricant products also have problems of easy foaming and reduced lubricity after high-temperature aging. The development work of type lubricants based on vegetable oil, synthetic ester, polymeric alcohol and the like is mainly carried out in the aspect of environment-friendly lubricants in China, and various environment-friendly lubricants are developed successively, but compared with foreign companies, the environment-friendly lubricants have larger gap, and particularly in field application, partial environment-friendly lubricants are insufficient in temperature resistance and salt resistance, and the lubricating performance is obviously reduced at the temperature of more than 150 ℃.
Secondly, the prior art also has the following limitations:
1. with the increasing strictness of environmental regulations, the use amount of conventional lubricants such as asphalt-based lubricants, diesel-based lubricants, mineral oil-based lubricants, and the like has been reduced year by year.
2. Vegetable oil-based lubricants, sulfonated tall oil lubricants, polymeric alcohol lubricants, synthetic ester lubricants, and the like also suffer from problems such as susceptibility to foaming and reduced lubricity after high temperature aging.
3 most of the lubricants currently in use have insufficient resistance to salts, especially to divalent salts, and the lubricating properties are reduced in detail.
With the development of petroleum exploration and development to deep stratum and the acceleration of shale oil and gas exploration and development, the number of horizontal wells is increased, the length of horizontal sections is increased, the bottom hole temperature is higher and the bottom hole paste salt layer is more and more, and the requirement of drilling operation on the lubricating property of drilling fluid is higher and higher. It is necessary to invent an environment-friendly lubricant which is resistant to high temperature and also resistant to divalent salts.
Disclosure of Invention
The invention aims to solve the technical problem of providing the salt-resistant lubricant for the drilling fluid, which is environment-friendly, has no influence on the viscosity performance of drilling, and has no foaming and good high temperature resistance.
The technical scheme adopted for solving the technical problems is as follows: a salt-resistant lubricant for drilling fluids, comprising: dimethyl silicone oil, castor oil and alkylphenol polyoxyethylene; wherein the mass percentages of the components are as follows: 75-85% of dimethyl silicone oil, 11-18% of castor oil and 3-8% of alkylphenol ethoxylates.
Further, the salt-resistant lubricant for the drilling fluid comprises the following components in percentage by mass: 78-82% of dimethyl silicone oil, 13-16% of castor oil and 4-7% of alkylphenol ethoxylates.
Furthermore, the salt-resistant lubricant for the drilling fluid comprises the following components in percentage by mass: 80% of dimethyl silicone oil, 15% of castor oil and 5% of alkylphenol ethoxylates.
The invention also provides a preparation method of the salt-resistant lubricant for drilling fluid, which comprises the following steps:
1) Sequentially adding simethicone and castor oil into a reaction kettle, heating to 45-55 ℃, stirring for 18-25min, and uniformly mixing;
2. adding alkylphenol polyoxyethylene, stirring for 0.8-1.2h, circulating for 0.8-1.2h by a colloid mill, and cooling and discharging to obtain the salt-resistant lubricant for drilling fluid.
Further, the preparation method of the salt-resistant lubricant for drilling fluid comprises the following steps:
1) Sequentially adding the simethicone and the castor oil into a reaction kettle, heating to 50 ℃, stirring for 20min, and uniformly mixing;
2. adding alkylphenol polyoxyethylene, stirring for 1h, circulating for 1h through a colloid mill with the thickness of 0.05-0.1 mm, and cooling and discharging to obtain the salt-resistant lubricant for drilling fluid.
The beneficial effects of the invention are as follows: the main component of the salt-resistant lubricant for the drilling fluid is dimethyl silicone oil, the product is environment-friendly, the viscosity performance of the drilling fluid is not affected, the foaming is avoided, the temperature resistance reaches 150 ℃, and the mud cake adhesion coefficient in the drilling fluid with the calcium chloride concentration of 20% and the potassium chloride concentration of 5% is less than 0.05; secondly, the preparation method of the salt-resistant lubricant for drilling fluid has simple process and low preparation cost.
Detailed Description
The invention relates to a salt-resistant lubricant for drilling fluid, which comprises the following components: dimethyl silicone oil, castor oil and alkylphenol polyoxyethylene; wherein the mass percentages of the components are as follows: 75-85% of dimethyl silicone oil, 11-18% of castor oil and 3-8% of alkylphenol ethoxylates.
Further, the salt-resistant lubricant for the drilling fluid comprises the following components in percentage by mass: 78-82% of dimethyl silicone oil, 13-16% of castor oil and 4-7% of alkylphenol ethoxylates.
Furthermore, the salt-resistant lubricant for the drilling fluid comprises the following components in percentage by mass: 80% of dimethyl silicone oil, 15% of castor oil and 5% of alkylphenol ethoxylates.
The main component of the salt-resistant lubricant for the drilling fluid is dimethyl silicone oil, the product is environment-friendly, the viscosity performance of the drilling fluid is not affected, the drilling fluid is not foamed, the temperature resistance reaches 150 ℃, and the mud cake adhesion coefficient in the drilling fluid with the calcium chloride concentration of 20% and the potassium chloride concentration of 5% is less than 0.05.
In order to simplify the preparation and reduce the preparation cost, the invention also provides a preparation method of the salt-resistant lubricant for drilling fluid, which comprises the following steps:
1) Sequentially adding simethicone and castor oil into a reaction kettle, heating to 45-55 ℃, stirring for 18-25min, and uniformly mixing;
2. adding alkylphenol polyoxyethylene, stirring for 0.8-1.2h, circulating for 0.8-1.2h by a colloid mill, and cooling and discharging to obtain the salt-resistant lubricant for drilling fluid.
Further, the preparation method of the salt-resistant lubricant for drilling fluid comprises the following steps:
1) Sequentially adding the simethicone and the castor oil into a reaction kettle, heating to 50 ℃, stirring for 20min, and uniformly mixing;
2. adding alkylphenol polyoxyethylene, stirring for 1h, circulating for 1h through a colloid mill with the thickness of 0.05-0.1 mm, and cooling and discharging to obtain the salt-resistant lubricant for drilling fluid.
The invention is further illustrated below with reference to examples.
Example 1
1. Adding 80 parts of simethicone and 15 parts of castor oil into a reaction kettle in sequence, heating to 50 ℃, stirring for 20min, and uniformly mixing.
2. Adding 5 parts of alkylphenol ethoxylates, stirring for 1h, circulating for 1h by a colloid mill (0.05-0.1 mm), and cooling and discharging to obtain the salt-resistant lubricant for drilling fluid.
Embodiment two:
1. 70 parts of simethicone and 15 parts of castor oil are sequentially added into a reaction kettle, heated to 50 ℃, stirred for 20min and uniformly mixed.
2. Adding 5 parts of alkylphenol ethoxylates, stirring for 0.8h, circulating for 1.2h through a colloid mill (0.05 mm-0.1 mm), and cooling and discharging to obtain the salt-resistant lubricant for drilling fluid.
Embodiment III:
1. adding 80 parts of simethicone and 10 parts of castor oil into a reaction kettle in sequence, heating to 45 ℃, stirring for 20min, and uniformly mixing.
2. Adding 5 parts of alkylphenol ethoxylates, stirring for 1.2 hours, circulating for 0.8 hours through a colloid mill (0.05 mm-0.1 mm), and cooling and discharging to obtain the salt-resistant lubricant for drilling fluid.
Embodiment four:
1. adding 80 parts of simethicone and 15 parts of castor oil into a reaction kettle in sequence, heating to 55 ℃, stirring for 18min, and uniformly mixing.
2. Adding 2 parts of alkylphenol ethoxylates, stirring for 1h, circulating for 1h by a colloid mill (0.05-0.1 mm), and cooling and discharging to obtain the salt-resistant lubricant for drilling fluid.
Fifth embodiment:
1. adding 80 parts of simethicone and 20 parts of castor oil into a reaction kettle in sequence, heating to 50 ℃, stirring for 25min, and uniformly mixing.
2. Adding 8 parts of alkylphenol ethoxylates, stirring for 1h, circulating for 1h by a colloid mill (0.05-0.1 mm), and cooling and discharging to obtain the salt-resistant lubricant for drilling fluid.
The "salt-resistant lubricant for drilling fluid" prepared in the above example was examined by:
two 400mL distilled water portions are taken, 20.0g sodium bentonite and 0.8g anhydrous sodium carbonate are respectively added, and after stirring for 20min at high speed, the mixture is placed in a closed state for 24h. 80.0g of calcium chloride, 20.0g of potassium chloride and 20.0g of salt-resistant bentonite are respectively added. Stirring at high speed for 5min. As blank base slurry
A part of the base slurry was taken, and 4.0g of the product was added as a sample slurry, and stirred at high speed for 5 minutes simultaneously with the base slurry. After hot rolling for 16h at 150 ℃, stirring at high speed for 5min.
And (3) testing:
1. the aged base slurry and sample slurry were tested for apparent viscosity as specified in GB/T16783.1-2014 at 6.3.2.
2. And collecting the base slurry and the sample slurry after the viscosity is tested, and respectively measuring the mud cake adhesion coefficient according to the operation rules of a mud cake adhesion coefficient meter. And calculates the sticking coefficient reduction rate.
Through the above test, the parameters of the "salt-resistant lubricant for drilling fluid" in the above examples were obtained as follows:
Claims (4)
1. the salt-resistant lubricant for the drilling fluid is characterized by comprising the following components: dimethyl silicone oil, castor oil and alkylphenol polyoxyethylene; wherein the mass percentages of the components are as follows: 78-82% of dimethyl silicone oil, 13-16% of castor oil and 4-7% of alkylphenol ethoxylates.
2. The salt-resistant lubricant for drilling fluids according to claim 1, wherein: the mass percentages of the components are as follows: 80% of dimethyl silicone oil, 15% of castor oil and 5% of alkylphenol ethoxylates.
3. A method of preparing a salt resistant lubricant for drilling fluids according to claim 1 or 2, comprising the steps of:
1) Sequentially adding simethicone and castor oil into a reaction kettle, heating to 45-55 ℃, stirring for 18-25min, and uniformly mixing;
2) Adding alkylphenol polyoxyethylene, stirring for 0.8-1.2h, circulating for 0.8-1.2h by a colloid mill, and cooling and discharging to obtain the salt-resistant lubricant for drilling fluid.
4. A method of preparing a salt resistant lubricant for drilling fluids as claimed in claim 3, comprising the steps of:
1) Sequentially adding the simethicone and the castor oil into a reaction kettle, heating to 50 ℃, stirring for 20min, and uniformly mixing;
2) Adding alkylphenol polyoxyethylene, stirring for 1h, circulating for 1h through a colloid mill with the thickness of 0.05-0.1 mm, and cooling and discharging to obtain the salt-resistant lubricant for drilling fluid.
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| CN201811237896.XA CN109233758B (en) | 2018-10-23 | 2018-10-23 | Salt-resistant lubricant for drilling fluid and preparation method thereof |
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| CN201811237896.XA CN109233758B (en) | 2018-10-23 | 2018-10-23 | Salt-resistant lubricant for drilling fluid and preparation method thereof |
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| CN109233758A CN109233758A (en) | 2019-01-18 |
| CN109233758B true CN109233758B (en) | 2023-07-25 |
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| CN110564382B (en) * | 2019-09-29 | 2021-07-20 | 中国石油集团川庆钻探工程有限公司钻井液技术服务公司 | Salt-resistant lubricant for drilling fluid and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101787265A (en) * | 2010-03-11 | 2010-07-28 | 中国石油集团川庆钻探工程有限公司 | Non-fluorescent lubricant for water-based drilling fluid |
| CN107556988A (en) * | 2017-08-22 | 2018-01-09 | 中国石油天然气集团公司 | A kind of high temperature resistance environmentally-frielubricant lubricant for drilling fluid and preparation method thereof |
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| US7338924B2 (en) * | 2002-05-02 | 2008-03-04 | Exxonmobil Upstream Research Company | Oil-in-water-in-oil emulsion |
| CN102329598B (en) * | 2011-06-10 | 2013-06-05 | 成都西油华巍科技有限公司 | Clean lubricant for drilling fluid and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787265A (en) * | 2010-03-11 | 2010-07-28 | 中国石油集团川庆钻探工程有限公司 | Non-fluorescent lubricant for water-based drilling fluid |
| CN107556988A (en) * | 2017-08-22 | 2018-01-09 | 中国石油天然气集团公司 | A kind of high temperature resistance environmentally-frielubricant lubricant for drilling fluid and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 钻井液用水基润滑剂NSR-1的研究与评价;赵道汉;陈娟;孙庆林;周向东;;油田化学(02);全文 * |
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