CN109321222B - Emulsion type paraffin remover and preparation method and application thereof - Google Patents
Emulsion type paraffin remover and preparation method and application thereof Download PDFInfo
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- CN109321222B CN109321222B CN201811481326.5A CN201811481326A CN109321222B CN 109321222 B CN109321222 B CN 109321222B CN 201811481326 A CN201811481326 A CN 201811481326A CN 109321222 B CN109321222 B CN 109321222B
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- 239000000839 emulsion Substances 0.000 title claims abstract description 55
- 239000012188 paraffin wax Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000001993 wax Substances 0.000 claims abstract description 78
- 239000004094 surface-active agent Substances 0.000 claims abstract description 36
- 239000002904 solvent Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003129 oil well Substances 0.000 claims abstract description 18
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical group [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims abstract description 13
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 claims description 40
- 239000003502 gasoline Substances 0.000 claims description 28
- 239000012046 mixed solvent Substances 0.000 claims description 23
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical group CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 14
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 12
- IVSZLXZYQVIEFR-UHFFFAOYSA-N m-xylene Chemical group CC1=CC=CC(C)=C1 IVSZLXZYQVIEFR-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000004090 dissolution Methods 0.000 claims description 8
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical group CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 229940078552 o-xylene Drugs 0.000 claims description 6
- MPVXINJRXRIDDB-VCDGYCQFSA-N dodecanoic acid;(2r,3r,4r,5s)-hexane-1,2,3,4,5,6-hexol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO.CCCCCCCCCCCC(O)=O MPVXINJRXRIDDB-VCDGYCQFSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- 230000006641 stabilisation Effects 0.000 abstract description 11
- 238000011105 stabilization Methods 0.000 abstract description 11
- 230000008021 deposition Effects 0.000 abstract description 6
- 239000003960 organic solvent Substances 0.000 abstract description 5
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 abstract description 2
- POULHZVOKOAJMA-UHFFFAOYSA-M dodecanoate Chemical compound CCCCCCCCCCCC([O-])=O POULHZVOKOAJMA-UHFFFAOYSA-M 0.000 abstract description 2
- 239000000600 sorbitol Substances 0.000 abstract description 2
- 239000010779 crude oil Substances 0.000 description 17
- 239000003921 oil Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 239000004064 cosurfactant Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- LWZFANDGMFTDAV-BURFUSLBSA-N [(2r)-2-[(2r,3r,4s)-3,4-dihydroxyoxolan-2-yl]-2-hydroxyethyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O LWZFANDGMFTDAV-BURFUSLBSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 235000011067 sorbitan monolaureate Nutrition 0.000 description 3
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 description 1
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 230000005660 hydrophilic surface Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229940051841 polyoxyethylene ether Drugs 0.000 description 1
- 229920000056 polyoxyethylene ether Polymers 0.000 description 1
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 1
- 229920000053 polysorbate 80 Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229950004959 sorbitan oleate Drugs 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Materials Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Detergent Compositions (AREA)
- Cosmetics (AREA)
Abstract
The invention provides an emulsion wax remover and a preparation method and application thereof, wherein the wax remover comprises the following components in percentage by volume: 55-60% of oily solvent, 0.5-3% of surfactant and the balance of water; wherein the surfactant is sodium dodecyl benzene sulfonate and/or sorbitol dodecanoate. The wax remover provided by the invention has a simple formula, and the selected surfactant can form stable emulsion in a system at normal temperature and has long stabilization time; on the other hand, when the paraffin remover is added into the stratum and the temperature is raised, the system can rapidly break emulsion, so that the organic solvent can more effectively play a paraffin dissolving role. The surface active agent selected by the invention can form a water film on the surface of the oil pipe, and the effects of reducing the wax deposition of the oil well and prolonging the wax removal period are achieved.
Description
Technical Field
The invention belongs to the field of oilfield chemical application, and relates to an emulsion type paraffin remover as well as a preparation method and application thereof.
Background
The crude oil in China is mostly wax-containing crude oil, the wax content is even up to 40%, the wax in the crude oil usually exists in a liquid form under the stratum condition, when the crude oil is pumped from the underground to the ground in the process of exploitation, the wax melting capacity of the crude oil is reduced along with the reduction of temperature and pressure, the wax is separated out from the crude oil and is deposited around the well wall and in a production sleeve, the reservoir is damaged, the wax deposition of the oil well seriously affects the normal work of the oil well, and the yield of the oil well is reduced or the oil well stops producing. Therefore, wax removal and prevention of oil wells is an important technical measure for ensuring normal production of wax-containing crude oil.
In order to solve the problem of wax deposition in oil fields, wax scrapers or hot water injection paraffin removal methods are adopted for a long time, and the methods are very complicated, and the oil well has to be stopped for a long time, so that certain economic loss is caused. The chemical paraffin removal method is adopted to remove the accumulated wax in the oil field, so that the normal production and other operations of the oil well cannot be influenced, and the effects of pour point depression, viscosity reduction and blockage removal can be achieved by using certain medicaments besides the paraffin removal and prevention effect; chemical wax removal is a very desirable economic means of ensuring that highly waxy wells are protected from wax deposits during production.
The paraffin cleaner commonly used for oil wells mainly comprises three types of oil-based paraffin cleaner, water-based paraffin cleaner and emulsion paraffin cleaner according to the type of solvent. The oil-based paraffin remover has the advantages of high paraffin dissolving speed, low freezing point, strong adaptability to crude oil and good paraffin removing effect, but the commonly used oil agent has high toxicity, is inflammable and explosive and is easily diluted by the crude oil, and part of solvent weighting agents are forbidden along with the establishment of SY/T6300 standards. The water-based paraffin remover has high relative density, is suitable for high-water-content oil wells, is not easy to catch fire, but has low paraffin removal speed and poor low-temperature fluidity, and the main component surfactant has high price and high use concentration and is not easy to popularize. The emulsion wax remover is immature in the selection of the organic solvent and the surfactant, so that the emulsion is poor in stability, the stabilization time is not matched with the wax precipitation depth of an oil well, and the wax removing effect is poor.
CN108359437A discloses an emulsion paraffin remover for oil wells, a preparation method and an application thereof, wherein the emulsion paraffin remover comprises the following components in parts by weight: 25-45 parts of diesel oil, 3-6 parts of gemini quaternary ammonium salt, 3-7 parts of fatty alcohol-polyoxyethylene ether, 1.5-2.5 parts of sorbitan oleate, 2-5 parts of mutual solvent, 1-3 parts of sodium hydroxide and 35-60 parts of water, wherein the wax remover provided enables the wax deposition surface to be inverted from an oleophylic surface to a hydrophilic surface, so that the wax can fall off easily, but the formula is complex, the cost is high, and the large-scale application is not facilitated. CN105038749A discloses an oil-in-water paraffin remover, which is prepared by mixing the following raw materials in percentage by weight: 10-20% of benzene, 5-15% of toluene, 10-15% of petroleum ether, 3-7% of surfactant, 2-8% of mutual solvent, 1-3% of alkaline substance, 3-10% of emulsifier and the balance of water, and the emulsion breaking agent is poor in stability and easy to break.
Therefore, it is necessary to develop an emulsion wax remover with simple formula, low cost and good wax dissolving effect to meet the application requirements.
Disclosure of Invention
The invention aims to provide an emulsion type paraffin remover, and a preparation method and application thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides an emulsion type paraffin remover, which comprises the following components in percentage by volume: 55-60% of oily solvent, 0.5-3% of surfactant and the balance of water.
Wherein the surfactant is sodium dodecyl benzene sulfonate and/or sorbitol dodecanoate (span 20).
The wax remover provided by the invention has a simple formula, and the selected surfactant can form stable emulsion in a system at normal temperature and has long stabilization time; on the other hand, when the paraffin remover is added into the stratum and the temperature is raised, the system can rapidly break emulsion, so that the organic solvent can more effectively play a paraffin dissolving role. The surface active agent selected by the invention can form a water film on the surface of the oil pipe, and the effects of reducing the wax deposition of the oil well and prolonging the wax removal period are achieved.
In the present invention, the oily solvent is contained in an amount of 55 to 60% by volume, for example, 56%, 57%, 58%, 59%, etc.
Preferably, the oily solvent comprises any one of p-xylene, m-xylene, o-xylene, gasoline, petroleum ether or cyclohexane or a combination of at least two of them; further preferred is a combination of gasoline and any one of o-xylene, m-xylene and p-xylene.
The crude oil wax has high melting point and aromatic ring structure, and xylene is selected as one part of the oily solvent in the invention to effectively dissolve the original wax. The wax block is composed of wax, colloid and asphaltene, and also has a part of crude oil wrapped, and the gasoline is straight-chain alkane, so that the crude oil wrapped in the wax block is easy to dissolve and separate out, therefore, when the combination of the xylene and the gasoline is selected, the wax dissolving rate is higher.
Preferably, the oily solvent is any one of a mixed solvent of o-xylene and gasoline in a volume ratio of 3:2, a mixed solvent of m-xylene and gasoline in a volume ratio of 3:2, a mixed solvent of p-xylene and gasoline in a volume ratio of 3:2 or a mixed solvent of p-xylene and gasoline in a volume ratio of 2:1, and is preferably a mixed solvent of p-xylene and gasoline in a volume ratio of 3: 2.
When the mixed solvent composed of paraxylene and gasoline in a volume ratio of 3:2 is selected, the dissolution rate of the crude oil wax is the highest.
In the present invention, the surfactant is present in an amount of 0.5 to 3% by volume, for example 0.8%, 1%, 1.5%, 1.8%, 2%, 2.2%, 2.5%, 2.8%, etc.
Preferably, the surfactant is sodium dodecylbenzenesulfonate.
The sodium dodecyl benzene sulfonate and the sorbitol laurate selected by the invention have better effect of stabilizing emulsion, but the sodium dodecyl benzene sulfonate is preferably added as the surfactant in the invention in consideration of economic cost in the industrial production process.
Preferably, the emulsion wax remover further comprises a cosurfactant.
The addition of the cosurfactant can improve the permeability of the wax remover of the emulsion to wax, so that the surfactant and the organic solvent in the emulsion can be better contacted with the wax and can be dissolved.
Preferably, the co-surfactant is n-butanol and/or diethyl ether.
Preferably, the co-surfactant is present in an amount of 1-2% by volume, such as 1.1%, 1.2%, 1.4%, 1.6%, 1.8%, etc., based on 100% total volume of the emulsion wax remover.
Preferably, the paraffin remover consists of the following components in percentage by volume: 60 percent of mixed solvent composed of p-xylene and gasoline according to the volume ratio of 3:2, 3 percent of sodium dodecyl benzene sulfonate and the balance of water.
Preferably, the paraffin remover consists of the following components in percentage by volume: 55 percent of mixed solvent consisting of p-xylene and gasoline in a volume ratio of 3:2, 3 percent of sodium dodecyl benzene sulfonate and the balance of water.
The emulsion wax remover is O/W type emulsion, in the emulsion wax remover system, the higher the oil phase content is, the better the wax removing effect is, but the too low water content, the emulsion can not exist stably, when the volume ratio of the oil solvent is selected to be 55-60%, the comprehensive performance of the wax removing effect and the stability of the emulsion wax remover can reach the best.
In a second aspect, the invention provides a preparation method of the emulsion type paraffin remover according to the first aspect, wherein the preparation method comprises the following steps: and adding a surfactant into water for dissolving, then adding an oily solvent and mixing to obtain the emulsion type paraffin remover.
Preferably, the dissolution is carried out in a stirred tank.
Preferably, the time of dissolution is 20-30min, such as 22min, 24min, 26min, 28min, and the like.
Preferably, the mixing time is 1-1.5h, e.g., 1.1h, 1.2h, 1.3h, 1.4h, etc.
In a third aspect, the invention provides the use of the emulsion-type paraffin remover according to the first aspect in oil well paraffin removal.
Compared with the prior art, the invention has the following beneficial effects:
(1) the wax remover provided by the invention has a simple formula, and the selected surfactant can form stable emulsion in a system at normal temperature and has long stabilization time; on the other hand, when the paraffin remover is added into the stratum and the temperature is raised, the system can rapidly break emulsion, so that the organic solvent can more effectively play a paraffin dissolving role. The surface active agent selected by the invention can also form a water film on the surface of the oil pipe, so that the oil well wax deposition is reduced, and the wax removal period is prolonged;
(2) when the mixed solvent composed of paraxylene and gasoline in a volume ratio of 3:2 is selected, the dissolving rate of the crude oil wax is highest;
(3) the emulsion type paraffin remover provided by the invention has a high dissolving rate for crude oil wax, and the emulsion has a long stabilization time at room temperature, wherein the wax dissolving rate is more than 0.015g/min, the stabilization time is more than 4.0h, and the emulsion can be rapidly broken at a high temperature, so that a solvent and the like can play a wax dissolving role with greater efficiency.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
An emulsion wax remover comprises the following components in percentage by volume: 60% of oily solvent, 3% of surfactant and the balance of water.
Wherein the oily solvent is a mixed solvent composed of p-xylene and gasoline in a volume ratio of 3:2, and the surfactant is sodium dodecyl benzene sulfonate.
The preparation method comprises the following steps:
and adding the surfactant into water, stirring and dissolving for 20min in a stirring kettle, then adding the oily solvent, and mixing for 1h to obtain the emulsion type paraffin remover.
Examples 2 to 5
The difference from example 1 is only that in this example, the oily solvent is a mixed solvent of o-xylene and gasoline in a volume ratio of 3:2 (example 2), a mixed solvent of m-xylene and gasoline in a volume ratio of 3:2 (example 3), a mixed solvent of p-xylene and gasoline in a volume ratio of 2:1 (example 4), and a mixed solvent of p-xylene, gasoline and petroleum ether in a volume ratio of 3:1:2 (example 5).
Example 6
The only difference from example 1 is that in this example, the surfactant is span 20 (0.5% by volume).
Example 7
An emulsion wax remover comprises the following components in percentage by volume: 55% of oily solvent, 3% of surfactant, 2% of cosurfactant and the balance of water.
Wherein the oily solvent is a mixed solvent composed of p-xylene and gasoline in a volume ratio of 3:2, the surfactant is span 20, and the cosurfactant is n-butyl alcohol.
The preparation method comprises the following steps:
and adding the surfactant and the cosurfactant into water, stirring and dissolving for 20min in a stirring kettle, then adding the oily solvent, and mixing for 1h to obtain the emulsion type paraffin remover.
Comparative examples 1 to 2
The only difference from example 1 is that in this example, the surfactant is tween 80 (1% by volume, comparative example 1), sodium oleate (1% by volume, comparative example 2).
Performance test 1
The performance of the paraffin wax remover provided in examples 1-7 and comparative examples 1-2 was tested as follows:
(1) wax dissolution rate: testing the Baoli Ge oilfield 18 well according to the test standard of SY/T6300-;
(2) emulsion stabilization time: placing the mixture at a constant temperature of 25 ℃, and recording the stabilization time of the mixture;
(3) demulsification time: recording the demulsification time of the emulsion under the constant temperature condition of 45 ℃;
(4) cost: and calculating the unit price of each component in the market.
The test results are shown in table 1:
TABLE 1
| Sample (I) | Rate of wax dissolution (g/min) | Stabilization time/h | Demulsification time/h | Cost (Yuan/ton) |
| Example 1 | 0.0240 | 4.0 | 0.1 | 4500 |
| Example 2 | 0.0211 | 4.0 | 0.1 | 4500 |
| Example 3 | 0.0218 | 4.0 | 0.1 | 4500 |
| Example 4 | 0.0231 | 4.0 | 0.1 | 6000 |
| Example 5 | 0.0155 | 4.0 | 0.1 | 4000 |
| Example 6 | 0.0240 | 4.2 | 0.1 | 7000 |
| Example 7 | 0.0250 | 4.0 | 0.1 | 6800 |
| Comparative example 1 | 0.0232 | 0.15 | 0.1 | 4600 |
| Comparative example 2 | 0.0235 | 0.15 | 0.1 | 4600 |
According to the embodiment and the test result, the emulsion type paraffin remover provided by the invention has a high dissolving rate of the crude oil wax, and the emulsion has a long stabilization time at room temperature, wherein the dissolving rate of the wax is more than 0.015g/min, and the stabilization time is more than 4.0 h. As can be seen from a comparison of example 1 and examples 2-5, when a mixed solvent of paraxylene and gasoline in a volume ratio of 3:2 is selected in the present invention, the dissolution rate of the crude oil wax is the highest, 0.0240 g/min. As can be seen from the comparison of example 1 with examples 6 to 7, the cost is lower when sodium dodecylbenzenesulfonate is selected for use in the present invention. As can be seen from the comparison between example 1 and comparative examples 1-2, the surfactant provided by the present invention has good emulsion stability.
Performance test 2
In order to test the wax dissolving effect of the emulsion wax remover on an oil well in practical application, the wax remover provided in example 1 is selected for testing, and the test results are shown in table 2:
TABLE 2
| Number of well | Mass of wax ball/g | Time/min | Rate of wax dissolution (g/min) |
| 18 well of bus | 1.102 | 62 | 0.0178 |
| Well 18-94 | 1.0536 | 55 | 0.0191 |
| 18-14 wells in bara | 1.0937 | 56 | 0.0196 |
| 18-30 wells | 1.0872 | 62 | 0.0176 |
| 18-44 wells | 1.0825 | 61 | 0.0176 |
| 18-84 wells | 1.0973 | 69 | 0.0160 |
| Well 19-10 | 1.0905 | 67 | 0.0162 |
| Well 48-21 | 1.1059 | 67 | 0.0165 |
As can be seen from performance tests, the emulsion wax remover provided by the invention can meet the wax removal requirements of different oil wells and has higher wax dissolving rate.
The applicant states that the invention is illustrated by the above examples to the emulsion wax remover and the preparation method and application thereof, but the invention is not limited to the above detailed method, i.e. it does not mean that the invention must be implemented by the above detailed method. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (14)
1. The emulsion type paraffin remover is characterized by comprising the following components in percentage by volume: 55-60% of oily solvent, 0.5-3% of surfactant and the balance of water;
wherein the surfactant is sodium dodecyl benzene sulfonate and/or sorbitol laurate;
the oily solvent is composed of any one of o-xylene, m-xylene and p-xylene and gasoline.
2. An emulsion-type paraffin remover according to claim 1, wherein the oily solvent is any one of a mixed solvent of o-xylene and gasoline in a volume ratio of 3:2, a mixed solvent of m-xylene and gasoline in a volume ratio of 3:2, a mixed solvent of p-xylene and gasoline in a volume ratio of 3:2, or a mixed solvent of p-xylene and gasoline in a volume ratio of 2: 1.
3. An emulsion-type paraffin remover according to claim 2, wherein the oily solvent is a mixed solvent of p-xylene and gasoline in a volume ratio of 3: 2.
4. An emulsion-type paraffin remover according to claim 1, wherein the surfactant is sodium dodecylbenzenesulfonate.
5. An emulsion wax remover according to claim 1, further comprising a co-surfactant.
6. An emulsion wax remover according to claim 5, wherein the co-surfactant is n-butanol and/or diethyl ether.
7. An emulsion wax remover according to claim 5, wherein the co-surfactant is present in an amount of 1-2% by volume, based on 100% by volume of the total emulsion wax remover.
8. An emulsion wax remover according to claim 1, wherein the wax remover comprises the following components in percentage by volume: 60 percent of mixed solvent composed of p-xylene and gasoline according to the volume ratio of 3:2, 3 percent of sodium dodecyl benzene sulfonate and the balance of water.
9. An emulsion wax remover according to claim 1, wherein the wax remover comprises the following components in percentage by volume: 55 percent of mixed solvent consisting of p-xylene and gasoline in a volume ratio of 3:2, 3 percent of sodium dodecyl benzene sulfonate and the balance of water.
10. A method of preparing an emulsion wax remover according to any of claims 1-9, comprising the steps of: and adding a surfactant into water for dissolving, then adding an oily solvent and mixing to obtain the emulsion type paraffin remover.
11. The method of claim 10, wherein the dissolving is performed in a stirred tank.
12. The method of claim 10, wherein the dissolution time is 20-30 min.
13. The method of claim 10, wherein the mixing time is 1-1.5 hours.
14. Use of the emulsion-type paraffin remover according to any one of claims 1-9 for oil well paraffin removal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811481326.5A CN109321222B (en) | 2018-12-05 | 2018-12-05 | Emulsion type paraffin remover and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811481326.5A CN109321222B (en) | 2018-12-05 | 2018-12-05 | Emulsion type paraffin remover and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109321222A CN109321222A (en) | 2019-02-12 |
| CN109321222B true CN109321222B (en) | 2021-01-22 |
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| CN111410947A (en) * | 2020-03-20 | 2020-07-14 | 克拉玛依新科澳实验检测有限公司 | Composite wax-proofing agent and preparation method thereof |
| CN111763508B (en) * | 2020-06-05 | 2022-08-23 | 中国石油大学(华东) | Emulsion type paraffin remover based on styrene tar and preparation method and application thereof |
| CN113121845A (en) * | 2021-03-25 | 2021-07-16 | 四川澳凯化工有限公司 | Emulsion type asphalt colloid dispersing agent and preparation method thereof |
| CN114015425A (en) * | 2021-11-24 | 2022-02-08 | 克拉玛依新科澳石油天然气技术股份有限公司 | Oil well medium density emulsion paraffin remover and preparation and use method thereof |
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