CN111378419A - High-temperature-resistant emulsifier for oil-based drilling fluid and preparation method thereof - Google Patents
High-temperature-resistant emulsifier for oil-based drilling fluid and preparation method thereof Download PDFInfo
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- CN111378419A CN111378419A CN201811625514.0A CN201811625514A CN111378419A CN 111378419 A CN111378419 A CN 111378419A CN 201811625514 A CN201811625514 A CN 201811625514A CN 111378419 A CN111378419 A CN 111378419A
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Abstract
The invention discloses a high-temperature resistant emulsifier for oil-based drilling fluid and a preparation method thereof, wherein the high-temperature resistant emulsifier is prepared from the following components in parts by mass: 45-75 parts of refined kitchen waste oil, 0.2-1 part of catalyst, 5-20 parts of alcohol amine, 5-25 parts of anionic surfactant, 0-10 parts of nonionic surfactant and 0-15 parts of additive. The raw material of the invention is refined kitchen waste oil, which is hydrolyzed into saturated fatty acid and unsaturated fatty acid by hydrolysis and glycerol removal, and the unsaturated fatty acid contains olefinic bond and reacts with amide to generate alcohol amide containing olefinic bond, which is used as an emulsifier with good performance for oil field drilling fluid, thus finding a new solution for increasing kitchen waste oil treatment problems; meanwhile, the kitchen waste oil is used as a main raw material, so that the kitchen waste oil is changed into a useful industrial resource, waste is changed into valuable, the bottleneck of recycling the kitchen waste oil is broken through, and secondary eating of the waste kitchen waste oil is blocked from the source.
Description
Technical Field
The invention belongs to the technical field of petrochemical industry, relates to an emulsifier for an oil-based drilling fluid, and particularly relates to a high-temperature resistant emulsifier for the oil-based drilling fluid and a preparation method thereof.
Background
Drilling fluids are circulating flushing media used in the drilling process, and can be divided into various types, such as water-based drilling fluids, oil-based drilling fluids and gas drilling fluids. The water-base drilling fluid is a multi-phase dispersion system composed of bentonite, water (or salt water), various treating agents, weighting materials and drill cuttings, and has the characteristics of low price, small pollution and the like, but the water-base drilling fluid has low recycling rate and poor settling effect controllability.
Compared with water-based drilling fluid, the oil-based drilling fluid has the advantages of high temperature resistance, salt and calcium corrosion resistance, contribution to well wall stability, good lubricity, smaller damage degree to oil-gas layers and the like, is an important means for drilling high-temperature deep wells, large-inclination directional wells, horizontal wells and various complex stratums, and can be widely used as stuck freeing fluid, perforation completion fluid, workover fluid, core flooding fluid and the like.
However, oil-based drilling fluids are much more expensive to formulate than water-based drilling fluids, tend to have a severe impact on the ecological environment near the well site when used, and typically have lower rates of penetration than water-based drilling fluids. The defects greatly limit the popularization and application of the oil-based drilling fluid. To increase the rate of penetration, low-gum water-in-oil emulsion drilling fluids have been used more extensively since the mid 70 s. In order to protect the ecological environment and meet the requirement of marine drilling, the low-toxicity water-in-oil emulsion drilling fluid using mineral oil as base oil is gradually popularized and used from the beginning of the 80 s. At present, oil-based drilling fluids are used less frequently, so the oil-based drilling fluid is mainly water-in-oil emulsified drilling fluid which uses diesel oil or low-toxicity mineral oil (white oil) as a continuous phase, water as a dispersed phase and emulsifier as a stabilizer.
The problems of poor wettability, poor rheological property, heavy material sedimentation, post-treatment of drilling fluid and the like commonly exist in the prior oil-based drilling fluid. Drilling fluid has poor rheological property (such as high viscosity, large shearing force, influence on pump efficiency and increase on pressure loss), poor sand carrying capacity, influence on drilling speed, and complicated conditions of sticking of a drill bit and the like after a long time. The oil-based drilling fluid is complex in components, is mostly organic pollutants which are difficult to degrade, and can cause great pollution to soil, underground water bodies and the like if leaked, and the oil-based drilling fluid is difficult to repair.
The base fluid of the oil-based drilling fluid is mainly water-in-oil emulsion, and the overall performance of the oil-based drilling fluid is mainly determined by whether the emulsion is stable or not. The continuous improvement and improvement of the performance of the emulsifier serving as an important component of the oil-based drilling fluid further promotes the development and application of the oil-based drilling fluid.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the high-temperature resistant emulsifier for the oil-based drilling fluid, which takes kitchen waste oil as a main raw material, has good rheological property and high-temperature stability, strong pollution resistance, little influence of the pollution of electrolyte and drill cuttings on the performance of an oil-based drilling fluid system, easy adjustment of performance, excellent reservoir protection characteristic and better reservoir protection effect of the oil-based drilling fluid; meanwhile, the kitchen waste oil is changed into valuable, the bottleneck of recycling the kitchen waste oil is broken through, and secondary eating of the kitchen waste oil is stopped from the source.
The invention also aims to provide the high-temperature resistant emulsifier for the oil-based drilling fluid and the preparation method thereof, and the method has the advantages of simple process and simple and convenient operation.
The invention is realized by the following technical scheme:
the high-temperature resistant emulsifier for the oil-based drilling fluid is prepared from the following components in parts by mass: 45-75 parts of refined kitchen waste oil, 0.2-1 part of catalyst, 5-20 parts of alcohol amine, 5-25 parts of anionic surfactant, 0-10 parts of nonionic surfactant and 0-15 parts of additive.
In the technical scheme, the catalyst is sodium carbonate Na2CO3And potassium hydroxide; the alcohol amine is one or more of monoethanolamine, diethanolamine, triethanolamine, hydroxyethyl ethylenediamine and polyethylene polyamine; the anionic surfactant is one or two of dodecyl benzene sulfonic acid and sodium dodecyl benzene sulfonate; the nonionic surfactant is one or more of fatty alcohol-polyoxyethylene ether AEO-5, fatty alcohol-polyoxyethylene ether AEO-7 and fatty alcohol-polyoxyethylene ether AEO-9; the additive is one or two of white oil and biodiesel.
On the other hand, the preparation method of the high-temperature resistant emulsifier for the oil-based drilling fluid comprises the following steps:
the method comprises the following steps: mixing kitchen waste oil, an anionic surfactant and water, adding the mixture into a reaction kettle, reacting and stirring the mixture for 2 to 2.15 hours at the temperature of between 100 and 120 ℃, hydrolyzing the mixture into unsaturated fatty acid, keeping the temperature of between 118 and 125 ℃, and dehydrating the unsaturated fatty acid for 1 to 1.15 hours under negative pressure;
wherein the volume ratio of the kitchen waste oil, the anionic surfactant and the water is (45-75): 5-10): 15-50, and the stirring speed is 80-100 r/min;
step two: adding alcohol amine and a catalyst into the product obtained in the step one, heating to 140-180 ℃, preserving heat for 1-2 h, reacting and stirring for 7-9 h, and stopping heating to obtain aliphatic alcohol amide containing olefinic bonds;
wherein the volume ratio of the alcohol amine to the catalyst is (5-20) to (0.2-1), and the stirring speed is 80-100 r/m;
step three: respectively adding an anionic surfactant, a nonionic surfactant and an additive into a reaction kettle in sequence, reacting and stirring for 1-1.15 h, and then naturally cooling;
wherein the volume ratio of the anionic surfactant, the nonionic surfactant and the additive is (15-20) to (0-10) to (0-15), and the stirring speed is 300-350 r/m.
In the technical scheme, the kitchen waste oil is 45-75 parts by mass, the catalyst is 0.2-1 part by mass, the alcohol amine is 5-20 parts by mass, the total content of anionic surfactant is 5-25 parts by mass, the nonionic surfactant is 0-10 parts by mass, and the additive is 0-15 parts by mass.
In the technical scheme, the catalyst is sodium carbonate Na2CO3And potassium hydroxide.
In the technical scheme, the alcohol amine is one or more of monoethanolamine, diethanolamine, triethanolamine, hydroxyethyl ethylenediamine and polyethylene polyamine.
In the technical scheme, the anionic surfactant is one or two of dodecylbenzene sulfonic acid and sodium dodecylbenzene sulfonate.
In the technical scheme, the nonionic surfactant is one or more of fatty alcohol-polyoxyethylene ether AEO-5, fatty alcohol-polyoxyethylene ether AEO-7 and fatty alcohol-polyoxyethylene ether AEO-9.
In the technical scheme, the additive is one or two of white oil and biodiesel.
On the other hand, the application of the high-temperature resistant emulsifier for the oil-based drilling fluid in the oil-based drilling fluid has the advantages that the high temperature resistance reaches 150 ℃, the demulsification voltage is more than 500V, and the oil-based drilling fluid containing the high-temperature resistant emulsifier has good rheological property and high-temperature stability; the oil-based drilling fluid system containing the high-temperature resistant emulsifier has low high-temperature and high-pressure filtration loss and high mud cake quality.
The invention has the advantages and beneficial effects that:
(1) the high-temperature resistant emulsifier provided by the invention is beneficial to suspension and sand carrying of the oil-based drilling fluid, an adsorption film with certain strength is formed on an oil/water interface, the oil-water interface tension or surface free energy is reduced, the external phase viscosity is increased, and the stability of the emulsion is maintained.
(2) The raw material of the high-temperature resistant emulsifier provided by the invention is refined kitchen waste oil, the glycerol is removed through hydrolysis, the refined kitchen waste oil is hydrolyzed into saturated fatty acid and unsaturated fatty acid, the unsaturated fatty acid contains olefinic bond, and the unsaturated fatty acid reacts with amide to generate alcohol amide containing olefinic bond, and the alcohol amide is used as an emulsifier with good performance for oil field drilling fluid, so that a new solution is found for increasing problems of kitchen waste oil treatment.
(3) The high-temperature resistant emulsifier provided by the invention takes the kitchen waste oil as a main raw material, so that the kitchen waste oil is changed into a useful industrial resource, waste is changed into valuable, the bottleneck of recycling the kitchen waste oil is broken through, secondary eating of the waste kitchen waste oil is blocked from the source, the environmental pollution is reduced, the health of people is ensured, the urban environment can be improved, the industrialization of the kitchen waste oil is realized, the development of the kitchen waste oil is promoted, and a reasonable utilization way is found for the kitchen waste oil resource.
Detailed Description
The present invention is described in further detail below with reference to specific examples. It should be noted that: the following examples are illustrative and not intended to be limiting, and are not intended to limit the scope of the invention.
The raw materials required in the following examples are all commercially available, the reaction kettle used is a 10-ton enamel reaction kettle, the alcohol amine is directly weighed and then pumped into the reaction kettle by a gear pump, the catalyst is solid, the alcohol amine is liquid, the anionic surfactant is liquid, and the nonionic surfactant is liquid.
Example one
The preparation method of the high-temperature resistant emulsifier for the oil-based drilling fluid comprises the following steps:
the method comprises the following steps: mixing kitchen waste oil, dodecylbenzene sulfonic acid and water, adding the mixture into a reaction kettle, reacting and stirring the mixture for 2 hours at the temperature of 110 ℃, hydrolyzing the mixture into unsaturated fatty acid, keeping the temperature of 120 ℃, and performing negative pressure pumping dehydration for 1 hour by using a water jet negative pressure machine;
wherein the volume ratio of the kitchen waste oil, the dodecylbenzene sulfonic acid and the water is 50:5:45, and the stirring speed is 80 r/min;
step two: adding monoethanolamine and sodium carbonate Na into the product obtained in the step one2CO3Heating to 150 ℃, preserving the heat for 1h, reacting and stirring for 7h, and stopping heating to obtain aliphatic alcohol amide containing olefinic bonds;
wherein the volume ratio of the hydroxyethyl ethylenediamine to the potassium hydroxide is 5:0.2, and the stirring speed is 80 r/min;
step three: adding dodecyl benzene sulfonic acid, fatty alcohol-polyoxyethylene ether AEO-5 and white oil into a reaction kettle in sequence, reacting and stirring for 1 hour, and then naturally cooling;
wherein the volume ratio of the dodecyl benzene sulfonic acid to the fatty alcohol-polyoxyethylene ether AEO-5 to the white oil is 15:1:1, and the stirring speed is 300 r/min.
Example two
The preparation method of the high-temperature resistant emulsifier for the oil-based drilling fluid comprises the following steps:
the method comprises the following steps: mixing kitchen waste oil, sodium dodecyl benzene sulfonate and water, adding into a reaction kettle, reacting and stirring at 115 ℃ for 2.1h, hydrolyzing into unsaturated fatty acid, keeping the temperature at 122 ℃ and performing negative pressure pumping dehydration for 1.1h by using a water jet negative pressure machine;
wherein the volume ratio of the kitchen waste oil, the sodium dodecyl benzene sulfonate and the water is 55:10:35, and the stirring speed is 90 r/min;
step two: adding hydroxyethyl ethylenediamine and potassium hydroxide into the product obtained in the step one, heating to 160 ℃, keeping the temperature for 1.1h, reacting and stirring for 8h, and stopping heating to obtain aliphatic alcohol amide containing olefinic bonds;
wherein the volume ratio of the hydroxyethyl ethylenediamine to the potassium hydroxide is 10:0.5, and the stirring speed is 90 r/min;
step three: adding sodium dodecyl benzene sulfonate, fatty alcohol-polyoxyethylene ether AEO-7 and biodiesel into a reaction kettle in sequence, reacting and stirring for 1.1h, and then naturally cooling;
wherein the volume ratio of the sodium dodecyl benzene sulfonate, the fatty alcohol-polyoxyethylene ether AEO-7 to the biodiesel is 15:5:8, and the stirring speed is 300 r/min.
EXAMPLE III
The preparation method of the high-temperature resistant emulsifier for the oil-based drilling fluid comprises the following steps:
the method comprises the following steps: mixing kitchen waste oil, a mixture of dodecylbenzene sulfonic acid and sodium dodecylbenzene sulfonate and water, adding the mixture into a reaction kettle, reacting and stirring the mixture for 2.1 hours at the temperature of 115 ℃, hydrolyzing the mixture into unsaturated fatty acid, keeping the temperature of the unsaturated fatty acid at the temperature of 122 ℃, and performing negative pressure pumping dehydration for 1.1 hours by using a water jet negative pressure machine;
wherein the volume ratio of the mixture of the kitchen waste oil, the dodecylbenzene sulfonic acid and the sodium dodecylbenzene sulfonate to the water is 60:10:30, and the stirring speed is 100 r/min;
step two: adding triethanolamine and potassium hydroxide into the product obtained in the first step, heating to 170 ℃, preserving heat for 1.15h, reacting and stirring for 9h, and stopping heating to obtain aliphatic alcohol amide containing olefinic bonds;
wherein the volume ratio of the triethanolamine to the potassium hydroxide is 10:0.5, and the stirring speed is 100 r/min;
step three: respectively adding sodium dodecyl benzene sulfonate, fatty alcohol-polyoxyethylene ether AEO-9 and biodiesel into a reaction kettle in sequence, reacting and stirring for 1.15h, and then naturally cooling;
wherein the volume ratio of the sodium dodecyl benzene sulfonate, the fatty alcohol-polyoxyethylene ether AEO-9 to the biodiesel is 15:5:8, and the stirring speed is 350 r/min.
When the high-temperature resistant emulsifier is applied to the oil-based drilling fluid, the high temperature resistance reaches 150 ℃, the demulsification voltage is more than 500V, and the oil-based drilling fluid containing the high-temperature resistant emulsifier has good rheological property and high-temperature stability; the oil-based drilling fluid system containing the high-temperature resistant emulsifier has low high-temperature and high-pressure filtration loss and high mud cake quality.
The production raw material of the high-temperature resistant emulsifier for the oil-based drilling fluid is kitchen waste oil, and the high-temperature resistant emulsifier is simple in source, economic and environment-friendly. As pollutants harmful to human health and living environment, the kitchen waste oil is recycled, so that the environmental pollution caused by the kitchen waste oil is reduced, and the method has positive significance for improving the ecological environment. The produced high-temperature resistant emulsifier for the oil-based drilling fluid is completely biodegradable, and the used discharge does not influence the environment; the waste oil from the waste kitchen is reasonably recycled and used as an important raw material of the oil field drilling fluid, so that the oil field drilling fluid can partially replace the limited petroleum resources in China, plays a role in promoting the aspects of relieving the energy crisis, promoting the economic sustainable development and the like, and can generate great economic benefit and social benefit.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (10)
1. The high-temperature resistant emulsifier for the oil-based drilling fluid is characterized by being prepared from the following components in parts by mass: 45-75 parts of refined waste food oil, 0.2-1 part of catalyst, 5-20 parts of alcohol amine, 5-25 parts of anionic surfactant, 0-10 parts of nonionic surfactant and 0-15 parts of additive.
2. The high temperature resistant emulsifier for oil-based drilling fluids according to claim 1, wherein the catalyst is soda ash Na2CO3And potassium hydroxide; the alcohol amine is one or more of monoethanolamine, diethanolamine, triethanolamine, hydroxyethyl ethylenediamine and polyethylene polyamine; the anionic surfactant is one or two of dodecyl benzene sulfonic acid and sodium dodecyl benzene sulfonate; the nonionic surfactant is one or more of fatty alcohol-polyoxyethylene ether AEO-5, fatty alcohol-polyoxyethylene ether AEO-7 and fatty alcohol-polyoxyethylene ether AEO-9; the additive is one or two of white oil and biodiesel.
3. The method for preparing the high temperature resistant emulsifier for oil-based drilling fluid according to claim 2, comprising the steps of:
the method comprises the following steps: mixing waste food oil, anionic surfactant and water, adding the mixture into a reaction kettle, reacting and stirring the mixture for 2 to 2.15 hours at the temperature of between 100 and 120 ℃, hydrolyzing the mixture into unsaturated fatty acid, continuously preserving the heat at the temperature of between 118 and 125 ℃, and dehydrating the mixture for 1 to 1.15 hours under negative pressure;
wherein the volume ratio of the waste food oil, the anionic surfactant and the water is (45-75): 5-10): 15-50, and the stirring speed is 80-100 r/min;
step two: adding alcohol amine and a catalyst into the product obtained in the step one, heating to 140-180 ℃, preserving heat for 1-2 h, reacting and stirring for 7-9 h, and stopping heating to obtain aliphatic alcohol amide containing olefinic bonds;
wherein the volume ratio of the alcohol amine to the catalyst is (5-20) to (0.2-1), and the stirring speed is 80-100 r/m;
step three: respectively adding an anionic surfactant, a nonionic surfactant and an additive into a reaction kettle in sequence, reacting and stirring for 1-1.15 h, and then naturally cooling;
wherein the volume ratio of the anionic surfactant, the nonionic surfactant and the additive is (15-20) to (0-10) to (0-15), and the stirring speed is 300-350 r/m.
4. The method according to claim 3, wherein the waste food oil is 45 to 75 parts by mass, the catalyst is 0.2 to 1 part by mass, the alcohol amine is 5 to 20 parts by mass, the total content of the anionic surfactant is 5 to 25 parts by mass, the nonionic surfactant is 0 to 10 parts by mass, and the additive is 0 to 15 parts by mass.
5. The method of claim 3, wherein the catalyst is sodium carbonate Na2CO3And potassium hydroxide.
6. The preparation method according to claim 3, wherein the alcohol amine is one or more of monoethanolamine, diethanolamine, triethanolamine, hydroxyethylethylenediamine and polyethylenepolyamine.
7. The method according to claim 3, wherein the anionic surfactant is one or both of dodecylbenzene sulfonic acid and sodium dodecylbenzene sulfonate.
8. The preparation method of claim 3, wherein the nonionic surfactant is one or more of fatty alcohol-polyoxyethylene ether AEO-5, fatty alcohol-polyoxyethylene ether AEO-7 and fatty alcohol-polyoxyethylene ether AEO-9.
9. The method of claim 3, wherein the additive is one or both of white oil and biodiesel.
10. The use of the high temperature resistant emulsifier for oil-based drilling fluids according to claim 1 or 2 in oil-based drilling fluids, wherein the high temperature resistance is 150 ℃ and the breaking voltage is more than 500V, and the oil-based drilling fluid containing the high temperature resistant emulsifier of the present invention has good rheological properties and high temperature stability; the oil-based drilling fluid system containing the high-temperature resistant emulsifier has low high-temperature and high-pressure filtration loss and high mud cake quality.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112239315A (en) * | 2020-10-27 | 2021-01-19 | 中国石油化工股份有限公司 | Waste oil-based mud treatment fluid, preparation method thereof and method for treating oil-based mud |
| CN114479781A (en) * | 2020-10-23 | 2022-05-13 | 中国石油化工股份有限公司 | Low-freezing-point emulsifier and preparation method thereof |
| CN115772389A (en) * | 2021-09-06 | 2023-03-10 | 中国石油化工股份有限公司 | Low-temperature emulsifier composition, low-temperature emulsifier and preparation method thereof |
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| US4374737A (en) * | 1980-01-14 | 1983-02-22 | Dana E. Larson | Nonpolluting drilling fluid composition |
| CN104140792A (en) * | 2014-04-23 | 2014-11-12 | 中国石油化工股份有限公司 | Emulsifier for oil-based drilling fluid as well as preparation method and application thereof |
| CN108117863A (en) * | 2016-11-28 | 2018-06-05 | 中国石油化工股份有限公司 | Water-In-Oil base drilling fluid and preparation method thereof |
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| US4374737A (en) * | 1980-01-14 | 1983-02-22 | Dana E. Larson | Nonpolluting drilling fluid composition |
| CN104140792A (en) * | 2014-04-23 | 2014-11-12 | 中国石油化工股份有限公司 | Emulsifier for oil-based drilling fluid as well as preparation method and application thereof |
| CN108117863A (en) * | 2016-11-28 | 2018-06-05 | 中国石油化工股份有限公司 | Water-In-Oil base drilling fluid and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114479781A (en) * | 2020-10-23 | 2022-05-13 | 中国石油化工股份有限公司 | Low-freezing-point emulsifier and preparation method thereof |
| CN112239315A (en) * | 2020-10-27 | 2021-01-19 | 中国石油化工股份有限公司 | Waste oil-based mud treatment fluid, preparation method thereof and method for treating oil-based mud |
| CN115772389A (en) * | 2021-09-06 | 2023-03-10 | 中国石油化工股份有限公司 | Low-temperature emulsifier composition, low-temperature emulsifier and preparation method thereof |
| CN115772389B (en) * | 2021-09-06 | 2023-10-17 | 中国石油化工股份有限公司 | Low-temperature emulsifier composition, low-temperature emulsifier and preparation method thereof |
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Application publication date: 20200707 |