CN112195019A - Emulsion type paraffin removal and prevention agent - Google Patents
Emulsion type paraffin removal and prevention agent Download PDFInfo
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- CN112195019A CN112195019A CN202011254199.2A CN202011254199A CN112195019A CN 112195019 A CN112195019 A CN 112195019A CN 202011254199 A CN202011254199 A CN 202011254199A CN 112195019 A CN112195019 A CN 112195019A
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- wax
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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 discloses an emulsion type paraffin removal and prevention agent which comprises an oil phase solvent, an emulsifier, a cosolvent, an alkaline regulator and water, wherein the oil phase solvent is a mixture of petroleum ether, cyclohexane and n-heptane in a volume ratio of 1: 0.5-1.5: 0.05-0.3, the emulsifier is glyceryl monostearate or/and sodium stearoyl lactylate, the cosolvent is diethylene glycol monobutyl ether or/and diethylene glycol monomethyl ether, and the alkaline regulator is sodium oxalate and sodium citrate. The emulsion type wax removing and preventing agent disclosed by the invention does not contain chlorine and sulfur, the toxicity of the wax removing and preventing agent is improved, the harm to operators is reduced, the obtained emulsion type wax removing and preventing agent has the effects of wax removing and preventing, the wax dissolving rate is more than 0.02g/min, and the wax preventing rate is more than 80%.
Description
Technical Field
The invention belongs to the technical field of oilfield application chemistry, and particularly relates to an emulsion type paraffin removal and prevention agent which is safe, stable and good in demulsification performance.
Background
In the field of oil exploitation, paraffin is alkane with 16-64 carbon atoms in crude oil, and wax in the crude oil usually exists in a dissolved state when the paraffin is in a stratum. During the crude oil extraction, when the oil layer flows into the bottom of the well and is lifted from the bottom of the well to the well head along the shaft, wax is separated out, grown, gathered and deposited on the wall of the oil pipe and the oil pumping rod in the form of crystals along with the reduction of temperature and pressure and the escape of dissolved gas, so that the yield of the oil well is reduced, and the problems of overload of the oil pumping rod, blockage of the oil pipe, increase of the load of the oil well and the like are caused. Most of crude oil in China belongs to high-wax crude oil, the crude oil with the wax mass fraction exceeding 10 percent almost accounts for 90 percent of the whole produced crude oil, and some crude oil even reaches 40 to 50 percent, and various measures are taken to remove deposited paraffin and prevent the deposition of paraffin, so that the method is one of key factors for ensuring high and stable yield of an oil field and improving the recovery ratio.
The chemical wax removing and preventing technology is characterized in that a chemical wax removing and preventing agent is added to weaken the wax precipitation speed of an oil well, change the flowability of crude oil and slow down and inhibit the generation of wax crystals, the commonly used wax removing and preventing agents comprise an oil-based wax removing and preventing agent and a water-based wax removing and preventing agent, the oil-based wax removing and preventing agent has high wax dissolving speed and high wax removing efficiency, but the density is low, the oil-based wax removing and preventing agent is not suitable for the oil well with high water content, the oil-based wax removing agent is generally high in toxicity, volatile, inflammable and explosive, poor in safety, and strict fireproof measures are required during use. The water-based wax cleaning and preventing agent has slow response rate when being added into an oil well, and the fluidity of the water-based wax cleaning and preventing agent needs to be further improved when the water-based wax cleaning and preventing agent is used in severe cold winter, so that the popularization and application range is limited. How to enhance the paraffin removal and prevention effects of the paraffin removal and prevention agent and ensure the environmental protection and safety and stability of the agent is a main problem in the research work of the paraffin removal agent at present.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide the emulsion type paraffin removal and prevention agent which is safe and efficient, can remove and prevent paraffin, has good demulsification performance and is stable to store.
Aiming at the purposes, the emulsion type paraffin removal and prevention agent adopted by the invention is composed of the following raw materials in percentage by volume:
50-75% of oil phase solvent, 1-5% of emulsifier, 1-4% of cosolvent, 0.5-2% of alkaline regulator and 20-45% of water.
The emulsion type paraffin removal and prevention agent of the invention is preferably composed of the following raw materials by volume percentage:
55-65% of oil phase solvent, 2-4% of emulsifier, 2-3% of cosolvent, 1-1.5% of alkaline regulator and 30-40% of water.
The oil phase solvent is a mixture of petroleum ether, cyclohexane and n-heptane with a volume ratio of 1: 0.5-2: 0.05-0.3, preferably a mixture of petroleum ether, cyclohexane and n-heptane with a volume ratio of 1: 1-1.5: 0.15-0.2
The emulsifier is one or a mixture of glyceryl monostearate and sodium stearoyl lactylate.
The cosolvent is any one or a mixture of diethylene glycol monobutyl ether and diethylene glycol monomethyl ether.
The alkaline regulator is one or a mixture of sodium oxalate and sodium citrate.
The preparation method of the emulsion type paraffin removal and prevention agent comprises the following steps: mixing petroleum ether, cyclohexane and n-heptane uniformly to obtain an oil phase solvent, and dissolving an alkaline regulator in water to obtain a water phase; and then sequentially adding the emulsifier and the cosolvent into the oil phase, stirring uniformly, adding the water phase, and continuously mixing uniformly.
The wax dissolving rate of the emulsion type wax removing and preventing agent is more than 0.02g/min, and the wax preventing rate is more than 80%. Compared with the existing paraffin remover, the emulsion type paraffin remover and inhibitor has the following advantages:
the emulsion type paraffin removal and prevention agent does not contain organic chlorine and carbon disulfide, is environment-friendly and safe, and is easy to store; the paraffin removal capacity is strong, the stability is good, the demulsification can be rapidly carried out at the wax precipitation temperature of an oil well, the field static paraffin dissolution rate is more than 0.03g/min, and the dynamic paraffin dissolution rate is 0.1 g/min; the dynamic paraffin removal rate at 30 ℃ is 0.02g/min and the dynamic paraffin removal rate is 0.045 g/min.
Detailed Description
The present invention will be described in further detail with reference to examples, but the scope of the present invention is not limited to these examples.
Example 1
The emulsion-type paraffin remover/inhibitor of the present embodiment comprises 650mL of oil phase solvent, 35mL of emulsifier, 30mL of cosolvent, 10mL of alkaline regulator, and 275mL of distilled water. Wherein the oil phase solvent is a mixture of petroleum ether, cyclohexane and n-heptane with the volume ratio of 1:1.5:0.2, the emulsifier is glyceryl monostearate, the cosolvent is diethylene glycol monobutyl ether, and the alkaline regulator is sodium citrate. The preparation method comprises the following steps: mixing petroleum ether, cyclohexane and n-heptane uniformly to obtain an oil phase solvent, and dissolving an alkaline regulator in water to obtain a water phase; and then sequentially adding the emulsifier and the cosolvent into the oil phase, stirring uniformly, adding the water phase, and continuously and uniformly mixing.
Example 2
The emulsion-type paraffin remover/inhibitor of the present embodiment comprises 600mL of oil phase solvent, 40mL of emulsifier, 20mL of cosolvent, 15mL of alkaline regulator, and 325mL of distilled water. Wherein the oil phase solvent is a mixture of petroleum ether, cyclohexane and n-heptane with the volume ratio of 1:1:0.15, the emulsifier is glyceryl monostearate, the cosolvent is diethylene glycol monobutyl ether, and the alkaline regulator is sodium citrate. The preparation method is the same as that of example 1.
Example 3
The emulsion-type paraffin remover/inhibitor of the embodiment comprises 550mL of oil phase solvent, 40mL of emulsifier, 30mL of cosolvent, 15mL of alkaline regulator and 365mL of distilled water. Wherein the oil phase solvent is a mixture of petroleum ether, cyclohexane and n-heptane with the volume ratio of 1:0.5:0.1, the emulsifier is glyceryl monostearate, the cosolvent is diethylene glycol monobutyl ether, and the alkaline regulator is sodium citrate. The preparation method is the same as that of example 1.
Example 4
The emulsion-type paraffin remover/inhibitor of the present embodiment comprises 650mL of oil phase solvent, 35mL of emulsifier, 30mL of cosolvent, 10mL of alkaline regulator, and 275mL of distilled water. Wherein the oil phase solvent is a mixture of petroleum ether, cyclohexane and n-heptane with the volume ratio of 1:1.5:0.2, the emulsifier is sodium stearyl lactate, the cosolvent is diethylene glycol monomethyl ether, and the alkaline regulator is sodium oxalate. The preparation method is the same as that of example 1.
Example 5
The emulsion-type paraffin remover/inhibitor of the present embodiment comprises 600mL of oil phase solvent, 40mL of emulsifier, 20mL of cosolvent, 15mL of alkaline regulator, and 325mL of distilled water. Wherein the oil phase solvent is a mixture of petroleum ether, cyclohexane and n-heptane with the volume ratio of 1:1.5:0.2, the emulsifier is sodium stearyl lactate, the cosolvent is diethylene glycol monomethyl ether, and the alkaline regulator is sodium oxalate. The preparation method is the same as that of example 1.
Example 6
The emulsion-type paraffin remover/inhibitor of the embodiment comprises 550mL of oil phase solvent, 40mL of emulsifier, 30mL of cosolvent, 15mL of alkaline regulator and 365mL of distilled water. Wherein the oil phase solvent is a mixture of petroleum ether, cyclohexane and n-heptane with the volume ratio of 1:1.5:0.2, the emulsifier is sodium stearyl lactate, the cosolvent is diethylene glycol monomethyl ether, and the alkaline regulator is sodium oxalate. The preparation method is the same as that of example 1.
In order to prove the beneficial effects of the invention, the inventor uses No. 58 paraffin to respectively test the wax dissolving rate of the emulsion type wax removing and preventing agent prepared in the examples 1-6 according to the test method in SY/T6300-2009 technical conditions for oil recovery, and measures the wax preventing rate of the product in the crude oil of a certain oil field, wherein the content of the paraffin in the crude oil is 20%, and the wax preventing rate is calculated according to the formula (1).
E＝(m0-m)/m0*100 (1)
Wherein E represents the wax control, expressed as a percentage; m is0Representing the wax precipitation amount of an oil sample without adding a clear paraffin inhibitor, and the unit g; m represents the wax precipitation amount of the oil sample added with the clear paraffin inhibitor and has unit g.
The test results are shown in Table 1.
TABLE 1 wax dissolution and wax control of emulsion clear wax control agents of examples 1-6
| Wax removing and preventing agent | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 |
| Rate of wax dissolution (g/min) | 0.028 | 0.025 | 0.021 | 0.026 | 0.024 | 0.022 |
| Percent wax control (%) | 86.5％ | 84.3％ | 81.2％ | 85.2％ | 84.6％ | 82.5％ |
As can be seen from the table 1, the emulsion type wax removing and preventing agent has the wax dissolving rate of more than 0.02g/min and the wax preventing rate of more than 80 percent, can effectively prevent oil wells from wax deposition, and has good wax removing and preventing effect.
Claims (4)
1. The emulsion type paraffin removal and prevention agent is characterized by comprising the following raw materials in percentage by volume:
50-75% of oil phase solvent, 1-5% of emulsifier, 1-4% of cosolvent, 0.5-2% of alkaline regulator and 20-45% of water;
the oil phase solvent is a mixture of petroleum ether, cyclohexane and n-heptane with the volume ratio of 1: 0.5-2: 0.05-0.3;
the emulsifier is one or a mixture of glyceryl monostearate and sodium stearoyl lactylate;
the cosolvent is any one or a mixture of diethylene glycol monobutyl ether and diethylene glycol monomethyl ether.
2. An emulsion-type paraffin remover and inhibitor according to claim 1, which is prepared from the following raw materials (by volume): 55-65% of oil phase solvent, 2-4% of emulsifier, 2-3% of cosolvent, 1-1.5% of alkaline regulator and 30-40% of water.
3. An emulsion-type paraffin remover/inhibitor according to claim 1 or 2, wherein: the oil phase solvent is a mixture of petroleum ether, cyclohexane and n-heptane with the volume ratio of 1: 1-1.5: 0.15-0.2.
4. An emulsion-type paraffin remover/inhibitor according to claim 1 or 2, wherein: the alkaline regulator is any one or a mixture of sodium oxalate and sodium citrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011254199.2A CN112195019A (en) | 2020-11-11 | 2020-11-11 | Emulsion type paraffin removal and prevention agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011254199.2A CN112195019A (en) | 2020-11-11 | 2020-11-11 | Emulsion type paraffin removal and prevention agent |
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| CN112195019A true CN112195019A (en) | 2021-01-08 |
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| CN202011254199.2A Pending CN112195019A (en) | 2020-11-11 | 2020-11-11 | Emulsion type paraffin removal and prevention agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN102888214A (en) * | 2012-10-24 | 2013-01-23 | 吕永恒 | Emulsion-type oil well viscosity-breaking paraffin removing and inhibiting agent and application method thereof |
| CN103923630A (en) * | 2014-04-21 | 2014-07-16 | 孙安顺 | Emulsion antiwax remover |
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| CN105255468A (en) * | 2015-10-28 | 2016-01-20 | 中国石油化工股份有限公司 | Emulsion type paraffin remover and inhibitor and preparation method thereof |
| CN108359437A (en) * | 2018-04-14 | 2018-08-03 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of oil well lotion paraffin remover and its preparation method and application |
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- 2020-11-11 CN CN202011254199.2A patent/CN112195019A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888214A (en) * | 2012-10-24 | 2013-01-23 | 吕永恒 | Emulsion-type oil well viscosity-breaking paraffin removing and inhibiting agent and application method thereof |
| CN103923630A (en) * | 2014-04-21 | 2014-07-16 | 孙安顺 | Emulsion antiwax remover |
| CN104371685A (en) * | 2014-11-24 | 2015-02-25 | 天津大港油田滨港集团博弘石油化工有限公司 | Paraffin remover and preparation method thereof |
| CN105255468A (en) * | 2015-10-28 | 2016-01-20 | 中国石油化工股份有限公司 | Emulsion type paraffin remover and inhibitor and preparation method thereof |
| CN108359437A (en) * | 2018-04-14 | 2018-08-03 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of oil well lotion paraffin remover and its preparation method and application |
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| 杜海军 等: "乳液型低温清防蜡剂的研制与应用", 《广州化工》, vol. 47, no. 4, 28 February 2019 (2019-02-28), pages 70 * |
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Cited By (1)
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| 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 |
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Application publication date: 20210108 |