CN114032080A - Composite cleaning agent and preparation method thereof - Google Patents
Composite cleaning agent and preparation method thereof Download PDFInfo
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- CN114032080A CN114032080A CN202111410707.6A CN202111410707A CN114032080A CN 114032080 A CN114032080 A CN 114032080A CN 202111410707 A CN202111410707 A CN 202111410707A CN 114032080 A CN114032080 A CN 114032080A
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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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
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Abstract
The invention belongs to the technical field of cleaning agents, and particularly relates to a composite cleaning agent and a preparation method thereof. The composite cleaning agent comprises the following raw materials in percentage by weight: 1.5-2.0% of disodium alcohol ether sulfosuccinate monoester, 0.8-1.0% of polyoxyethylene laurate, 1.0-1.2% of calcium lignosulfonate, 3.0-4.0% of dioctyl sodium sulfosuccinate, 5.5-7.5% of trimethylolpropane polyoxypropylene polyoxyethylene ether, 6.0-6.5% of organic solvent and the balance of water. The compound cleaning agent has the advantages of good safety, low toxicity, high flash point, good compatibility, no damage to an oil layer, low organic solvent consumption and good cleaning effect on the oil layer; the preparation method of the compound cleaning agent has the advantages that the technological parameters are easy to control, the large-scale production can be realized, and the cleaning agent prepared by the method has stable performance.
Description
Technical Field
The invention belongs to the technical field of cleaning agents, and particularly relates to a composite cleaning agent and a preparation method thereof.
Background
The crude oil in the victory oil field is heavy viscous oil with high content of colloid, asphaltene and wax. The following problems exist in the production process: the blocking yield of a production stratum is reduced for a long time, the wax deposition caused by the flowing temperature change of crude oil can not be carried out, the operation of depositing steel wires with organic scales can not be carried out, the organic scales deposited on the pipe column and the oil stains can not be thoroughly removed in the offshore well repairing process, and the oil stains splash off in the pipe column lifting process can cause environmental pollution and the operation can not be carried out. Therefore, reservoir protection is needed for oil fields.
The purpose of oil layer protection is to remove the damage of mud filtrate to the stratum in the drilling process, reduce the stratum pollution in the well completion process and improve the injection and production capacity of the oil-water well. And injecting a cleaning agent to clean the oil layer before water injection is a main measure for protecting the oil layer.
At present, a cleaning agent adopted for cleaning an oil layer is compounded by a plurality of solvents and surfactants, can dissolve and clean high-viscosity organic matters such as colloid, asphaltene and wax in a stratum, can well disperse an oil phase in a water phase through the solubilization of the surfactants, reduces the interfacial tension of oil and water, and prevents an oil-water mixture from forming emulsification blockage. Meanwhile, the cleaning agent forms an isolation zone between the crude oil and the subsequent acid liquor, so that the colloid, the asphaltene and the acid liquor in the crude oil are prevented from contacting to form acidified sludge.
In the past, organic matter precipitation is solved by injecting a large amount of organic solvents such as diesel oil or benzene, but the organic solvent treatment has several problems: the organic solvent has large dosage and high cost; the organic solvent has low flash point and poor safety; the cleaning agent has the advantages of high toxicity, no water absorption, no relevant compatibility research, unclear whether to damage an oil layer, waste of a large amount of energy, environmental pollution and poor cleaning effect.
Therefore, a new and compound oil layer cleaning agent needs to be explored.
Disclosure of Invention
The purpose of the invention is: provides a compound cleaning agent. The compound cleaning agent has the advantages of good safety, small toxicity, good compatibility and good cleaning effect on oil layers; the invention also provides a preparation method thereof.
The composite cleaning agent disclosed by the invention comprises the following raw materials in percentage by weight:
1.5 to 2.0 percent of disodium alcohol ether sulfosuccinate monoester
Lauric acid polyoxyethylene ester 0.8-1.0%
1.0 to 1.2 percent of calcium lignosulfonate
3.0 to 4.0 percent of sodium dioctyl sulfosuccinate
5.5 to 7.5 percent of trimethylolpropane polyoxypropylene polyoxyethylene ether
6.0 to 6.5 percent of organic solvent
The balance of water.
Wherein:
the alcohol ether disodium sulfosuccinate is disodium laureth sulfosuccinate, and the molecular formula is shown as follows:
the polyoxyethylene laurate is polyoxyethylene-10 laurate.
The organic solvent is ethylene glycol monobutyl ether.
The preparation method of the compound cleaning agent comprises the following steps:
(1) adding an organic solvent into water, uniformly mixing, and then adding calcium lignosulfonate and stirring;
(2) and (2) adding alcohol ether sulfosuccinic acid monoester disodium, dioctyl sodium sulfosuccinate, trimethylolpropane polyoxypropylene polyoxyethylene ether and lauric acid polyoxyethylene ester into the mixed solution prepared in the step (1), and stirring for a period of time to prepare the composite cleaning agent.
Wherein:
the stirring time in the step (1) is 15-20min, and the stirring speed is 300-500 r/min.
The stirring time in the step (2) is 30-45 min.
The compound cleaning agent of the invention, alcohol ether sulfo succinic acid monoester disodium is an anionic surfactant, but has the chemical properties of double surfaces of a nonionic surfactant and the anionic surfactant, because the molecule of the compound cleaning agent contains carboxylic acid group, sulfonic group and long chain alkyl etherified oxyethylene group, the compound cleaning agent has wetting, dispersing and solubilizing functions on high-viscosity organic matters such as wax, asphaltene and colloid, can promote wax and the like to be better dissolved in the cleaning agent, but only selects the alcohol ether sulfo succinic acid monoester disodium, wax, asphaltene, colloid and other high-viscosity organic matters to be very slow and limited in dissolving speed and dissolving amount in the compound cleaning agent, and can not enable the high-viscosity organic matters to be quickly dissolved in the compound cleaning agent, therefore, the nonionic surfactant-lauric acid polyoxyethylene ester is added, and the lauric acid polyoxyethylene ester and the alcohol ether sulfo succinic acid monoester disodium are synergistic, the composite cleaning agent can reduce the dissolving time of high-viscosity organic matters such as wax, asphaltene and colloid in the composite cleaning agent, plays a role in activity solubilization, promotes the dissolution of the high-viscosity organic matters such as wax, asphaltene and colloid in the composite cleaning agent, increases the solubility of the high-viscosity organic matters in the composite cleaning agent, and has better emulsifying property and good compatibility compared with other polymerization degrees.
The calcium lignosulfonate is a high-molecular polymer anionic surfactant, and is added to destroy intermolecular acting force and weaken intermolecular interaction, so that high-viscosity organic matters such as wax, asphaltene and colloid can be better dispersed in the composite cleaning agent without aggregation and precipitation.
In addition, the dioctyl sodium sulfosuccinate is added, and has strong permeability and foamability, so that the contact area of the composite cleaning agent and high-viscosity organic matters such as wax, asphaltene and colloid can be increased, the high-viscosity organic matters are better dissolved in the composite cleaning agent, and the composite cleaning agent is compounded with trimethylolpropane polyoxypropylene polyoxyethylene ether for use, so that the prepared cleaning agent has strong permeability, the surfaces of the high-viscosity organic matters such as wax, asphaltene and colloid are inverted from lipophilicity to hydrophilicity, the high-viscosity organic matters such as scaled paraffin wax are fallen and dissolved, and the re-adsorption of the new high-viscosity organic matters is prevented due to the change of the surface hydrophilicity and lipophilicity, and the purpose of preventing the high-viscosity organic matters from being deposited again is finally achieved.
The organic solvent is ethylene glycol monobutyl ether, the compatibility with other raw materials is good, the surface activity is certain, the ethylene glycol monobutyl ether is compounded with water to serve as a solvent of other raw materials, the dissolving capacity, the permeability and the stability of the finally prepared cleaning agent can be improved, and the ethylene glycol monobutyl ether has smaller molecular weight than other solvents, so that the permeability is strong, the cleaning effect on a boundary layer is good, and the finally prepared composite cleaning agent has the effect of preventing high-viscosity organic matters from being deposited again by being matched with the interaction of other raw materials.
Compared with the prior art, the invention has the following beneficial effects:
(1) the compound cleaning agent disclosed by the invention selects a compound of ethylene glycol monobutyl ether and water as a solvent, so that the prepared cleaning agent has good permeability and stability and the performance of preventing high-viscosity organic matters from redepositing; waxy, asphaltene, colloid and other high-viscosity organic matters are dissolved in the cleaning agent under the action of trimethylolpropane polyoxypropylene polyoxyethylene ether, the compound of alcohol ether disodium sulfosuccinate and polyoxyethylene laurate can promote the rapid dissolution of the high-viscosity organic matters and improve the solubility of the high-viscosity organic matters, and the addition of calcium lignosulfonate improves the dispersibility of the dissolved high-viscosity organic matters and prevents the high-viscosity organic matters from aggregation and settlement; in order to improve the action strength of the cleaning agent and ensure that the cleaning agent has good cleaning effect in a short time, the sodium dioctyl sulfosuccinate is added, so that the cleaning agent has good permeability, the depth and the breadth of the action are deepened, and the aim of cleaning an oil layer is fulfilled as soon as possible.
(2) The compound cleaning agent disclosed by the invention has the advantages of good safety, low toxicity, high flash point, good compatibility, no damage to an oil layer, low organic solvent consumption and good cleaning effect on the oil layer.
(3) The preparation method of the compound cleaning agent has the advantages that the process parameters are easy to control, the large-scale production can be realized, and the cleaning agent prepared by the method has stable performance.
Detailed Description
The present invention is further described below with reference to examples.
Example 1
The compound cleaning agent described in this embodiment 1 is composed of the following raw materials in percentage by weight:
2.0 percent of disodium alcohol ether sulfosuccinate monoester
Lauric acid polyoxyethylene ester 0.8%
1.2 percent of calcium lignosulfonate
Sodium dioctyl sulfosuccinate 4.0%
7.5 percent of trimethylolpropane polyoxypropylene polyoxyethylene ether
6.5 percent of organic solvent
The balance of water.
Wherein:
the alcohol ether disodium sulfosuccinate is disodium laureth sulfosuccinate, and the molecular formula is shown as follows:
the polyoxyethylene laurate is polyoxyethylene-10 laurate.
The organic solvent is ethylene glycol monobutyl ether.
The preparation method of the compound cleaning agent described in this embodiment 1 comprises the following steps:
(1) adding an organic solvent into water, uniformly mixing, and then adding calcium lignosulfonate and stirring;
(2) and (2) adding alcohol ether sulfosuccinic acid monoester disodium, dioctyl sodium sulfosuccinate, trimethylolpropane polyoxypropylene polyoxyethylene ether and lauric acid polyoxyethylene ester into the mixed solution prepared in the step (1), and stirring for a period of time to prepare the composite cleaning agent.
Wherein:
the stirring time in the step (1) is 20min, and the stirring speed is 500 r/min.
The stirring time in the step (2) is 45 min.
Example 2
The compound cleaning agent of embodiment 2 is composed of the following raw materials in percentage by weight:
alcohol ether sulfosuccinic acid monoester disodium 1.5%
Lauric acid polyoxyethylene ester 1.0%
1.1 percent of calcium lignosulfonate
Sodium dioctyl sulfosuccinate 3.5%
6.5 percent of trimethylolpropane polyoxypropylene polyoxyethylene ether
6.2 percent of organic solvent
The balance of water.
Wherein:
the alcohol ether disodium sulfosuccinate is disodium laureth sulfosuccinate, and the molecular formula is shown as follows:
the polyoxyethylene laurate is polyoxyethylene-10 laurate.
The organic solvent is ethylene glycol monobutyl ether.
The preparation method of the compound cleaning agent described in this embodiment 2 comprises the following steps:
(1) adding an organic solvent into water, uniformly mixing, and then adding calcium lignosulfonate and stirring;
(2) and (2) adding alcohol ether sulfosuccinic acid monoester disodium, dioctyl sodium sulfosuccinate, trimethylolpropane polyoxypropylene polyoxyethylene ether and lauric acid polyoxyethylene ester into the mixed solution prepared in the step (1), and stirring for a period of time to prepare the composite cleaning agent.
Wherein:
the stirring time in the step (1) is 20min, and the stirring speed is 400 r/min.
The stirring time in the step (2) is 40 min.
Example 3
The compound cleaning agent of the embodiment 3 comprises the following raw materials in percentage by weight:
alcohol ether sulfosuccinic acid monoester disodium 1.8%
Lauric acid polyoxyethylene ester 0.9%
1.0 percent of calcium lignosulfonate
3.0 percent of sodium dioctyl sulfosuccinate
5.5 percent of trimethylolpropane polyoxypropylene polyoxyethylene ether
6.0 percent of organic solvent
The balance of water.
Wherein:
the alcohol ether disodium sulfosuccinate is disodium laureth sulfosuccinate, and the molecular formula is shown as follows:
the polyoxyethylene laurate is polyoxyethylene-10 laurate.
The organic solvent is ethylene glycol monobutyl ether.
The preparation method of the compound cleaning agent described in this embodiment 3 comprises the following steps:
(1) adding an organic solvent into water, uniformly mixing, and then adding calcium lignosulfonate and stirring;
(2) and (2) adding alcohol ether sulfosuccinic acid monoester disodium, dioctyl sodium sulfosuccinate, trimethylolpropane polyoxypropylene polyoxyethylene ether and lauric acid polyoxyethylene ester into the mixed solution prepared in the step (1), and stirring for a period of time to prepare the composite cleaning agent.
Wherein:
the stirring time in the step (1) is 15min, and the stirring speed is 450 r/min.
The stirring time in the step (2) is 35 min.
Comparative example 1
The composite cleaning agent of comparative example 1 is prepared from the following raw materials in percentage by weight:
2.8 percent of disodium alcohol ether sulfosuccinate monoester
1.2 percent of calcium lignosulfonate
Sodium dioctyl sulfosuccinate 4.0%
7.5 percent of trimethylolpropane polyoxypropylene polyoxyethylene ether
6.5 percent of organic solvent
The balance of water.
Wherein:
the alcohol ether disodium sulfosuccinate is disodium laureth sulfosuccinate, and the molecular formula is shown as follows:
the organic solvent is ethylene glycol monobutyl ether.
The preparation method of the composite cleaning agent in the comparative example 1 is the same as that in the example 1.
Comparative example 2
The composite cleaning agent of comparative example 2 is prepared from the following raw materials in percentage by weight:
2.0 percent of disodium alcohol ether sulfosuccinate monoester
Lauric acid polyoxyethylene ester 0.8%
Sodium dioctyl sulfosuccinate 4.0%
7.5 percent of trimethylolpropane polyoxypropylene polyoxyethylene ether
6.5 percent of organic solvent
The balance of water.
Wherein:
the alcohol ether disodium sulfosuccinate is disodium laureth sulfosuccinate, and the molecular formula is shown as follows:
the polyoxyethylene laurate is polyoxyethylene-10 laurate.
The organic solvent is ethylene glycol monobutyl ether.
The preparation method of the composite cleaning agent in the comparative example 2 is the same as that in the example 1.
Comparative example 3
The composite cleaning agent of the comparative example 3 comprises the following raw materials in percentage by weight:
2.0 percent of disodium alcohol ether sulfosuccinate monoester
Lauric acid polyoxyethylene ester 0.8%
1.2 percent of calcium lignosulfonate
7.5 percent of trimethylolpropane polyoxypropylene polyoxyethylene ether
6.5 percent of organic solvent
The balance of water.
Wherein:
the alcohol ether disodium sulfosuccinate is disodium laureth sulfosuccinate, and the molecular formula is shown as follows:
the polyoxyethylene laurate is polyoxyethylene-10 laurate.
The organic solvent is ethylene glycol monobutyl ether.
The preparation method of the composite cleaning agent described in the comparative example 3 is the same as that of the example 1.
Comparative example 4
The composite cleaning agent of comparative example 4 comprises the following raw materials in percentage by weight:
2.0 percent of disodium alcohol ether sulfosuccinate monoester
Lauric acid polyoxyethylene ester 0.8%
1.2 percent of calcium lignosulfonate
Sodium dioctyl sulfosuccinate 4.0%
6.5 percent of organic solvent
The balance of water.
Wherein:
the alcohol ether disodium sulfosuccinate is disodium laureth sulfosuccinate, and the molecular formula is shown as follows:
the polyoxyethylene laurate is polyoxyethylene-10 laurate.
The organic solvent is ethylene glycol monobutyl ether.
The preparation method of the composite cleaning agent described in the comparative example 4 is the same as that of the example 1.
The performance of the composite cleaning agent prepared in the examples 1-3 and the comparative examples 1-4 is tested, and the oil washing rate is detected by adopting enterprise standard Q/HF 11-2017 of Shengli oilfield marine environmental protection chemical industry, wherein the test method of the wax dissolution rate comprises the following steps: after weighing 5g of white paraffin wax into the cleaner and then magnetically stirring at 55 ℃ for 30min, the wax dissolution rate was calculated, the dissolution rate = mass of wax already dissolved x 100%/mass of wax initially added, and the test data are shown in the following table:
Claims (7)
1. a compound cleaning agent is characterized in that: the composite material comprises the following raw materials in percentage by weight:
1.5 to 2.0 percent of disodium alcohol ether sulfosuccinate monoester
Lauric acid polyoxyethylene ester 0.8-1.0%
1.0 to 1.2 percent of calcium lignosulfonate
3.0 to 4.0 percent of sodium dioctyl sulfosuccinate
5.5 to 7.5 percent of trimethylolpropane polyoxypropylene polyoxyethylene ether
6.0 to 6.5 percent of organic solvent
The balance of water.
2. A compound cleaning agent as defined in claim 1, which is characterized in that: the alcohol ether sulfosuccinic acid monoester disodium is lauryl polyoxyethylene ether sulfosuccinic acid monoester disodium.
3. A compound cleaning agent as defined in claim 1, which is characterized in that: the polyoxyethylene laurate is polyoxyethylene-10 laurate.
4. A compound cleaning agent as defined in claim 1, which is characterized in that: the organic solvent is ethylene glycol monobutyl ether.
5. A preparation method of the compound cleaning agent as claimed in claim 1, which is characterized in that: the method comprises the following steps:
(1) adding an organic solvent into water, uniformly mixing, and then adding calcium lignosulfonate and stirring;
(2) and (2) adding alcohol ether sulfosuccinic acid monoester disodium, dioctyl sodium sulfosuccinate, trimethylolpropane polyoxypropylene polyoxyethylene ether and lauric acid polyoxyethylene ester into the mixed solution prepared in the step (1), and stirring for a period of time to prepare the composite cleaning agent.
6. A preparation method of a compound cleaning agent as claimed in claim 5, characterized in that: the stirring time in the step (1) is 15-20min, and the stirring speed is 300-500 r/min.
7. A preparation method of a compound cleaning agent as claimed in claim 5, characterized in that: the stirring time in the step (2) is 30-45 min.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020160921A1 (en) * | 2001-02-23 | 2002-10-31 | Taylor Robert S. | Methods and compositions for treating subterranean formations with gelled hydrocarbon fluids |
| CN101074362A (en) * | 2007-06-20 | 2007-11-21 | 中国石油天然气股份有限公司 | Pollution-free well flushing fluid |
| CN102899009A (en) * | 2012-09-20 | 2013-01-30 | 中国海洋石油总公司 | Cleaning agent for heat cleaning of wellhole and preparation method thereof |
| US20130048281A1 (en) * | 2011-08-25 | 2013-02-28 | Halliburton Energy Services, Inc. | Wellbore servicing fluids and methods of making and using same |
| US20130196882A1 (en) * | 2010-06-30 | 2013-08-01 | Lino Firmano Junior | Flow additive for light or heavy crude oils, use of the additive and process to improve the extraction, pumping and/or transport of light or heavy crude oils |
| CN103343675A (en) * | 2013-07-18 | 2013-10-09 | 中国海洋石油总公司 | Compound plug removal technological method for offshore oil field injection well |
| CN103602326A (en) * | 2013-10-14 | 2014-02-26 | 中国石油天然气股份有限公司 | Novel efficient well flushing fluid with oil layer protection effect, and preparation method and application thereof |
| US20170166801A1 (en) * | 2015-12-11 | 2017-06-15 | Ethical Solutions, Llc | Solvent systems having a high flash point and methods of use thereof |
-
2021
- 2021-11-25 CN CN202111410707.6A patent/CN114032080B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020160921A1 (en) * | 2001-02-23 | 2002-10-31 | Taylor Robert S. | Methods and compositions for treating subterranean formations with gelled hydrocarbon fluids |
| CN101074362A (en) * | 2007-06-20 | 2007-11-21 | 中国石油天然气股份有限公司 | Pollution-free well flushing fluid |
| US20130196882A1 (en) * | 2010-06-30 | 2013-08-01 | Lino Firmano Junior | Flow additive for light or heavy crude oils, use of the additive and process to improve the extraction, pumping and/or transport of light or heavy crude oils |
| US20130048281A1 (en) * | 2011-08-25 | 2013-02-28 | Halliburton Energy Services, Inc. | Wellbore servicing fluids and methods of making and using same |
| CN102899009A (en) * | 2012-09-20 | 2013-01-30 | 中国海洋石油总公司 | Cleaning agent for heat cleaning of wellhole and preparation method thereof |
| CN103343675A (en) * | 2013-07-18 | 2013-10-09 | 中国海洋石油总公司 | Compound plug removal technological method for offshore oil field injection well |
| CN103602326A (en) * | 2013-10-14 | 2014-02-26 | 中国石油天然气股份有限公司 | Novel efficient well flushing fluid with oil layer protection effect, and preparation method and application thereof |
| US20170166801A1 (en) * | 2015-12-11 | 2017-06-15 | Ethical Solutions, Llc | Solvent systems having a high flash point and methods of use thereof |
Non-Patent Citations (2)
| Title |
|---|
| J. L. GIDLEY等: "Study of the Field Application of Sandstone Acidizing", 《JOURNAL OF PETROLEUM TECHNOLOGY》 * |
| 肖立晓等: "醇醚型高效解堵剂的制备与矿场应用", 《油田化学》 * |
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