CN106566495B - Tackifying and cutting-improving agent for oil-based drilling fluid and preparation method and application thereof - Google Patents
Tackifying and cutting-improving agent for oil-based drilling fluid and preparation method and application thereof Download PDFInfo
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- CN106566495B CN106566495B CN201510656659.7A CN201510656659A CN106566495B CN 106566495 B CN106566495 B CN 106566495B CN 201510656659 A CN201510656659 A CN 201510656659A CN 106566495 B CN106566495 B CN 106566495B
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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
- C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based
- C09K8/34—Organic liquids
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C231/00—Preparation of carboxylic acid amides
- C07C231/02—Preparation of carboxylic acid amides from carboxylic acids or from esters, anhydrides, or halides thereof by reaction with ammonia or amines
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/32—Polymers modified by chemical after-treatment
- C08G65/329—Polymers modified by chemical after-treatment with organic compounds
- C08G65/331—Polymers modified by chemical after-treatment with organic compounds containing oxygen
- C08G65/332—Polymers modified by chemical after-treatment with organic compounds containing oxygen containing carboxyl groups, or halides, or esters thereof
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- Oil, Petroleum & Natural Gas (AREA)
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Abstract
The invention discloses a tackifying and cutting-improving agent for oil-based drilling fluid and a preparation method and application thereof. The tackifying and cutting agent is prepared by reacting poly fatty acid and amino-terminated polyether under the conditions of heating and nitrogen protection atmosphere, wherein the poly fatty acid and the amino-terminated polyether are added according to the molar ratio of carboxyl to amino of 1:03-0.5, the reaction temperature is controlled at 160-200 ℃, and the tackifying and cutting agent is obtained by heating for 30min after heating until no water is generated. The tackifying and shear strength improving agent has good suspension performance in the oil-based drilling fluid, and the dynamic-plastic ratio and the shear strength of the system are obviously improved.
Description
Technical Field
The invention relates to a tackifying and shear strength improving agent for oil-based drilling fluid, a preparation method and application thereof, belonging to the field of drilling fluid.
Background
The oil-based drilling fluid has obvious advantages in the aspects of stabilizing well walls, lubricating and preventing blockage, inhibiting hydration and expansion of shale, making slurry in stratum, quickly drilling and the like, and becomes an important means for drilling various complex well sections and shale gas long horizontal sections. The oil-based drilling fluid system also has some problems, which are mainly shown in that the shear force of the system is small, and the shear force is one of key rheological parameters determining the performance of the oil-based drilling fluid and directly influences the rock carrying effect, the barite sedimentation, the equivalent circulating density, the suction pressure and the like. Complex wells can only be successfully drilled if the shear force is properly controlled and kept stable. The shear strength of the drilling fluid system is generally increased by adding a viscosifying shear-promoting agent to the drilling fluid system. The conventional common tackifying and shearing-promoting agent mainly comprises oil-based soil, oxidized asphalt, oil-based lignite and the like, and the oil-based drilling fluid obtained from the tackifying and shearing-promoting agent has poor shearing and diluting properties, and the drilling fluid can show higher viscosity at high rotating speed, so that the frictional resistance of the drilling fluid is higher in the drilling process, and the novel tackifying and shearing-promoting agent is developed, so that the oil-based drilling fluid has higher viscosity and shearing force at low rotating speed, and has lower viscosity and shearing force at high shearing speed, thereby having important significance.
Disclosure of Invention
The invention aims to provide a tackifying and cutting-improving agent for an oil-based drilling fluid.
The tackifying and shearing agent provided by the invention is prepared by reacting poly fatty acid and amino-terminated polyether under the conditions of heating and nitrogen protection atmosphere, wherein the poly fatty acid and the amino-terminated polyether are added according to the molar ratio of carboxyl to amino of 1:03-0.5, and the reaction temperature is 160-200 ℃.
Another object of the present invention is to provide a method for preparing a tackifying and cutting agent, comprising the steps of: (1) weighing poly fatty acid and amino-terminated polyether according to the molar ratio of carboxyl to amino of 1: 03-0.5; (2) adding the polyacid into a reactor, starting stirring, introducing nitrogen for protection, and then starting heating; (3) heating to 160 ℃, keeping constant temperature, then starting to dropwise add the amino-terminated polyether, continuing to heat to 180 ℃ after complete dropwise addition, keeping the temperature until no water is removed, and continuing to react for 30min to finish the reaction; (4) cooling to 50 ℃ to obtain the tackifying and cutting-extracting agent.
The polymerized fatty acid is a mixture of oleic acid dimer and oleic acid trimer, wherein the content of dimer is 10-40%, the content of trimer is 60-90%, and the content of oleic acid monomer is less than 1%.
The structural general formula of the amino-terminated polyether is as follows: NH (NH)2CH（CH3）CH2（OR）mCH2NH2Wherein R is C2-C3And m is a radical of 2 to 68, preferably 2 to 33.
The molar ratio of the carboxyl to the amino is 1: 03-0.5.
The reaction temperature is 160-200 ℃.
The tackifying and shearing agent is used for tackifying and shearing of the oil-based drilling fluid and can obviously improve the dynamic-plastic ratio and shearing force of an oil-based drilling fluid system.
Detailed Description
Example 1
250g (containing 0.8mol of carboxyl group) of a polyacid was charged in a 500mL four-necked flask equipped with a stirrer, a heating device, a thermometer, a dropping funnel and a dehydration device, stirring was started and nitrogen was introduced, then heating was started and 86.4g (containing 0.4mol of amino group) of D400 (formula NH) was heated to 160 ℃2CH（CH3）CH2（OR）mCH2NH2Wherein R is isopropyl, m is 6.1) is filled into a dropping funnel, D400 is dripped into a four-neck flask under the stirring and 160 ℃, after the dripping is finished, the temperature is continuously increased to 180 ℃ for reaction, the temperature is kept until no water is generated, the reaction is continuously carried out for 30min, and after the reaction is finished, the temperature is reduced to 50 ℃, thus obtaining the tackifying and shear strength improving agent for the oil-based drilling fluid.
Example 2
250g (containing 0.8mol of carboxyl group) of a polyacid was charged in a 500mL four-necked flask equipped with a stirrer, a heating device, a thermometer, a dropping funnel and a dehydration device, stirring was started and nitrogen was introduced, then heating was started and 51.84g (containing 0.24mol of amino group) of D400 (formula NH) was heated to 160 ℃2CH（CH3）CH2（OR）mCH2NH2Wherein R is isopropyl, m is 6.1) is filled into a dropping funnel, D400 is dripped into a four-neck flask under the stirring and 160 ℃, after the dripping is finished, the temperature is continuously increased to 180 ℃ for reaction, the temperature is kept until no water is generated, the reaction is continuously carried out for 30min, and after the reaction is finished, the temperature is reduced to 50 ℃, thus obtaining the tackifying and shear strength improving agent for the oil-based drilling fluid.
Example 3
125g (containing 0.4mol of carboxyl group) of a polyacid in a four-necked flask as described in example 1 was charged, stirring was started and nitrogen gas was introduced, and then heating was started to 160 deg.C200g (containing 0.2mol of amino groups) of D2000 (formula NH)2CH（CH3）CH2（OR）mCH2NH2Wherein R is isopropyl, m is 33), adding the mixture into a dropping funnel, dropwise adding D2000 into a four-neck flask under stirring at 160 ℃, continuing to heat to 200 ℃ for reaction after the dropwise addition is finished, keeping the temperature until no water is generated, continuing to react for 30min, and cooling to 50 ℃ after the reaction is finished to obtain the tackifying and shearing enhancing agent for the oil-based drilling fluid.
Example 4
In a four-necked flask as described in example 1, 62.5g (containing 0.2mol of carboxyl group) of a polyacid was charged, stirring was started and nitrogen was introduced, then heating was started and 200g (containing 0.1mol of amine group) of D4000 (formula NH) was heated to 160 ℃2CH（CH3）CH2（OR）mCH2NH2Wherein R is isopropyl, m is 68), adding the mixture into a dropping funnel, dropwise adding D2000 into a four-neck flask under stirring at 160 ℃, continuing to heat to 170 ℃ for reaction after the dropwise adding is finished, keeping the temperature until no water is generated, continuing to react for 30min, and cooling to 50 ℃ after the reaction is finished to obtain the tackifying and shearing enhancing agent for the oil-based drilling fluid.
Test example 1
Measuring 240mL of No. 0 diesel oil by using a measuring cylinder, pouring the diesel oil into a high-speed stirring cup, numbering No. 1-6, adding no tackifying and cutting-up agent in No. 1, adding 3g and 6g of tackifying and cutting-up agent prepared in example 1 into No. 2 and No. 3 respectively, adding 3g of tackifying and cutting-up agent prepared in example 2-4 into No. 4 and No. 6 respectively, stirring at high speed for 10min to dissolve the tackifying and cutting-up agent, adding 12g of main emulsifier and 6g of auxiliary emulsifier, stirring at high speed for 10min, adding 12g of organic soil, stirring for 10min, adding 60mL of calcium chloride aqueous solution with the mass concentration of 25%, and stirring at high speed for 20 min. Then the demulsification voltage and the rheological property of the emulsion are tested.
TABLE 1 tackification promotion and evaluation of indoor Performance
| Serial number | AV, mPa·s | PV, mPa·s | YP, Pa | GEL, 10″/10′ | YP/PV | ES, V |
| 1 | 28 | 24 | 4 | 4/8 | 0.167 | 277 |
| 2 | 40 | 32 | 8 | 8/11 | 0.25 | 335 |
| 3 | 47.5 | 35 | 12.5 | 11/15 | 0.357 | 342 |
| 4 | 60.5 | 42 | 18.5 | 18/27 | 0.440 | 329 |
| 5 | 40.5 | 28 | 12.5 | 10/12 | 0.446 | 406 |
| 6 | 52.5 | 38 | 14.5 | 13/15 | 0.382 | 318 |
From the test results it can be seen that: after the thickening and cutting agent prepared by the application is added into a system, the YP value of the system is obviously increased, namely the suspension capacity of the system is increased, which shows that the thickening and cutting agent prepared by the application has obvious thickening and cutting effects, the YP value of the thickening and cutting agent prepared by the application is obviously increased to be higher than the PV value, and the cutting effect is obviously higher than the thickening effect.
Claims (2)
1. The oil-based drilling fluid tackifying and shearing-improving agent is characterized by being prepared by reacting poly fatty acid and amine-terminated polyether under the conditions of heating and nitrogen protection atmosphereAdding the poly fatty acid and the amine-terminated polyether according to the molar ratio of 1: 0.3-0.5; the polymerized fatty acid is a mixture of oleic acid monomer, oleic acid dimer and oleic acid trimer, wherein the content of dimer is 10-40%, the content of trimer is 60-90%, and the content of oleic acid monomer is less than 1%; the structural general formula of the amino-terminated polyether is as follows: NH (NH)2CH（CH3）CH2（OR）mCH2NH2Wherein R is C2-C3A group, m is 2 to 68; the preparation method of the tackifying and cutting-improving agent comprises the following steps: (1) weighing poly fatty acid and amine-terminated polyether according to the molar ratio of carboxyl to amine; (2) adding the polyacid into a reactor, starting stirring, introducing nitrogen for protection, and then starting heating; (3) heating to 160 ℃, keeping constant temperature, then starting to dropwise add the amino-terminated polyether, continuing to heat to 180 ℃ after complete dropwise addition, keeping the temperature until no water is removed, and continuing to react for 30min to finish the reaction; (4) cooling to 50 ℃ to obtain the tackifying and cutting-extracting agent.
2. The adhesion-promoting shear promoter of claim 1, wherein: and m is 2-33.
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| CN201510656659.7A CN106566495B (en) | 2015-10-12 | 2015-10-12 | Tackifying and cutting-improving agent for oil-based drilling fluid and preparation method and application thereof |
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| CN201510656659.7A CN106566495B (en) | 2015-10-12 | 2015-10-12 | Tackifying and cutting-improving agent for oil-based drilling fluid and preparation method and application thereof |
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| CN106566495A CN106566495A (en) | 2017-04-19 |
| CN106566495B true CN106566495B (en) | 2021-11-09 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103666414A (en) * | 2013-12-12 | 2014-03-26 | 中国石油集团渤海钻探工程有限公司 | Polyamide amine flowing modifier for mineral oil based drilling fluid and preparation method of modifier |
| CN103694968A (en) * | 2013-12-23 | 2014-04-02 | 中国石油集团渤海钻探工程有限公司 | Acylamino amine oil-based well drilling liquid wetting agent and preparation method thereof |
| CN104818004A (en) * | 2015-05-20 | 2015-08-05 | 中国海洋石油总公司 | Tackifying and shear strength improving agent as well as preparation method and application of tackifying and shear strength improving agent |
| CN104893691A (en) * | 2015-05-27 | 2015-09-09 | 中国石油大学(北京) | Dimer acid-organic amine copolymer, preparation method and application thereof, water-in-oil emulsified drilling fluid shear strength improving agent and drilling fluid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7934557B2 (en) * | 2007-02-15 | 2011-05-03 | Halliburton Energy Services, Inc. | Methods of completing wells for controlling water and particulate production |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103666414A (en) * | 2013-12-12 | 2014-03-26 | 中国石油集团渤海钻探工程有限公司 | Polyamide amine flowing modifier for mineral oil based drilling fluid and preparation method of modifier |
| CN103694968A (en) * | 2013-12-23 | 2014-04-02 | 中国石油集团渤海钻探工程有限公司 | Acylamino amine oil-based well drilling liquid wetting agent and preparation method thereof |
| CN104818004A (en) * | 2015-05-20 | 2015-08-05 | 中国海洋石油总公司 | Tackifying and shear strength improving agent as well as preparation method and application of tackifying and shear strength improving agent |
| CN104893691A (en) * | 2015-05-27 | 2015-09-09 | 中国石油大学(北京) | Dimer acid-organic amine copolymer, preparation method and application thereof, water-in-oil emulsified drilling fluid shear strength improving agent and drilling fluid |
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