CN105419756A - Wax removal and inhibition composition, water-soluble wax removal and inhibition agent and preparation method thereof - Google Patents
Wax removal and inhibition composition, water-soluble wax removal and inhibition agent and preparation method thereof Download PDFInfo
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- CN105419756A CN105419756A CN201510714168.3A CN201510714168A CN105419756A CN 105419756 A CN105419756 A CN 105419756A CN 201510714168 A CN201510714168 A CN 201510714168A CN 105419756 A CN105419756 A CN 105419756A
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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 present invention relates to a wax removal and inhibition composition, a water-soluble wax removal and inhibition agent and a preparation method thereof, and belongs to the technical field of oil exploitation. The wax removal and inhibition composition consists of the following components in parts by weight: 8-12 parts of alkyl phenol polyoxyethylene ether, 4-6 parts of polyoxyethylene sorbitol anhydride fatty acid ester, 8-12 parts of fatty alcohol polyoxyethylene ether, 20-30 parts of an ether co-solvent, and 4-6 parts of a sequestering agent. The wax dissolution rate of the water-solubility wax removal and inhibition agent obtained by the preparation method of the present invention reaches more than 0.020 g/min, the wax inhibiting rate reaches more than 71%, the density is greater than 0.95 g/cm<3>, so that the water-solubility wax removal and inhibition agent has a good wax removal and inhibition effect, and is extremely convenient to use.
Description
Technical field
The present invention relates to a kind of Paraffin Removal composition, water-soluble wax removing agent and preparation method thereof, belong to technical field of petroleum extraction.
Background technology
In Oil extraction field, all a certain amount of wax can be contained under normal circumstances in crude oil, wax in crude oil in the earth formation exists with dissolved state usually, but, in crude oil production process, the crude oil liquid of oil well output is exploited and is transported on ground from stratum, temperature and the suffered pressure of crude oil liquid constantly decline, when the fusing point of crude oil liquid temperature lower than wax wherein, wax starts crystallization, the wax of separating out can be deposited on R a T inwall, causes the problems such as sucker rod overload, oil-line plugging, causes well oil output to decline.
For ensureing oily well yield and production efficiency, in current crude production, prevent the method for precipitation of paraffin from mainly containing mechanical paraffin removal, heating power Paraffin Removal and chemical agent Paraffin Removal etc.Mechanical paraffin removal and heating power wax removal effectively can remove the paraffin of deposition in oil well, but oil well must stop production during this two kinds of method operations, and energy consumption is larger, wherein also there is defects such as polluting stratum in heating power wax removal mode, especially when reservoir pressure is lower, heating power wax removal also can cause flushing fluid to pour in down a chimney phenomenon, and impact is normally produced.Chemical agent Paraffin Removal technology can overcome the shortcoming of above-mentioned two kinds of methods and also wax removal effective and there is extraordinary market application foreground.
The wax removing agent that paraffin removing with chemical method uses mainly contains oil-base paraffin remover and water based dewaxing agent, and oil-base paraffin remover wax removal efficiency is high, but irritant smell, volatile, and inflammable and explosive also there is larger toxicity, security is poor.
Summary of the invention
The object of the present invention is to provide the Paraffin Removal composition that a kind of security is high.The present invention also aims to provide a kind of water-soluble wax removing agent and preparation method thereof.
In order to realize above object, the technical scheme of Paraffin Removal composition of the present invention is as follows:
A kind of Paraffin Removal composition, is made up of the component of following parts by weight: alkylphenol polyoxyethylene 8 ~ 12 parts, polyoxyethylene sorbitan carboxylic ester 4 ~ 6 parts, fatty alcohol-polyoxyethylene ether 8 ~ 12 parts, ethers solubility promoter 20 ~ 30 parts, sequestrant 4 ~ 6 parts.
Alkylphenol polyoxyethylene, polyoxyethylene sorbitan carboxylic ester and fatty alcohol-polyoxyethylene ether in Paraffin Removal composition of the present invention can play the effect of wettability reversal, make wax deposition surface be reversed to water-wetted surface by oil-wetted surface, are conducive to coming off of wax.The osmosis of this several material can make the cohesive force between wax molecule and tube wall weaken simultaneously, thus is convenient to it to remove from tube wall.Ethers solubility promoter can increase oil and the mutual solubility of water, impels wax crystalline substance dissolve and enter in oil stream.Sequestrant is alkaline matter, with the bituminous matter isopolarity substance reaction in wax, can generate water-soluble product, and sequestrant also can with the Ca in water simultaneously
2+, Mg
2+there is sequestering action, play the effect of scale inhibition.
Abovementioned alkyl phenol polyethenoxy ether, polyoxyethylene sorbitan carboxylic ester and fatty alcohol-polyoxyethylene ether are existing material, the present invention is applied in water-soluble Paraffin Removal technical field, mainly in order to improve the molten wax efficiency of Paraffin Removal composition, improve Paraffin Removal effect.In order to improve molten wax effect further, in Paraffin Removal composition of the present invention, each component can be carried out preferably following:
Described alkylphenol polyoxyethylene has following general structure:
Wherein, the value that the value of n is preferably 8 ~ 9, m is preferably 9 ~ 15, and namely in alkylphenol polyoxyethylene, the carbon chain lengths of alkyl is preferably 8 ~ 9, and the polyoxyethylated polymerization degree is preferably 9 ~ 15.
The general structure of described polyoxyethylene sorbitan carboxylic ester is:
Wherein, x+y+z+w=20 in molecular structure, namely the polyoxyethylene polymerization degree sum of each position is that the value of 20, m is preferably 11 ~ 17, and namely in molecular structure, the carbon chain lengths of lipid acid is preferably 11 ~ 17.
The general structure of described fatty alcohol-polyoxyethylene ether is:
Wherein, the value that the value of a is preferably 12 ~ 18, b is preferably 15 ~ 20, and namely in fatty alcohol-polyoxyethylene ether, the carbon chain lengths of fatty alcohol is preferably 12 ~ 18, and the polyoxyethylated polymerization degree is preferably 15 ~ 20.
The technical scheme of water-soluble wax removing agent of the present invention is as follows:
A kind of water-soluble wax removing agent, be made up of the component of following weight percent: alkylphenol polyoxyethylene 8% ~ 12%, polyoxyethylene sorbitan carboxylic ester 4% ~ 6%, fatty alcohol-polyoxyethylene ether 8% ~ 12%, ethers solubility promoter 20% ~ 30%, sequestrant 4% ~ 6%, surplus is water or simulation salt solution.
The technical scheme of the preparation method of water-soluble wax removing agent of the present invention is as follows:
A preparation method for water-soluble wax removing agent, is characterized in that, comprises the steps:
Get alkylphenol polyoxyethylene, polyoxyethylene sorbitan carboxylic ester, fatty alcohol-polyoxyethylene ether, ethers solubility promoter, sequestrant add in water or simulation salt solution, after Homogeneous phase mixing, namely obtain described water-soluble wax removing agent.
In order to make to have given play to better wax removal effect, in Paraffin Removal composition of the present invention, water-soluble wax removing agent and its preparation method, the weight ratio of described alkylphenol polyoxyethylene, polyoxyethylene sorbitan carboxylic ester, fatty alcohol-polyoxyethylene ether, ethers solubility promoter and Sodium hexametaphosphate 99 is preferably 2:1:2:5:1.
In order to promote the dissolving of alkylphenol polyoxyethylene, polyoxyethylene sorbitan carboxylic ester, fatty alcohol-polyoxyethylene ether further, in Paraffin Removal composition of the present invention, water-soluble wax removing agent and its preparation method, described ethers solubility promoter is preferably ethylene glycol ethyl ether, butyl glycol ether or propylene glycol monomethyl ether.
In order to promote the bituminous matter isopolarity substance reaction in sequestrant and wax further, generating water-soluble product, promoting the Ca in sequestrant and water simultaneously
2+, Mg
2+sequestering action occurs, and play the effect of scale inhibition, in Paraffin Removal composition of the present invention, water-soluble wax removing agent and preparation method thereof, described sequestrant is preferably tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 or trisodium phosphate.
Various salinity is often there is in local water environment residing for oil well, when the amount being added to the wax removing agent in oil well is larger, wax removing agent is easy to the impact being subject to local water environment, in order to avoid the result of use of oil-well strata environment to wax removing agent impacts, water in water-soluble wax removing agent of the present invention and preparation method thereof can use simulation salt solution, and this simulation salt solution can be prepared according to the ground environment in the oil field of the actual use of wax removing agent.Such as, according to the salt content of the local water environment of certain oil well recorded in the embodiment of the present invention 3, the simulation salt solution of preparation comprises the component of following weight percent: NaCl4.06%, CaCl
20.59%, MgCl
20.18%, NaHCO
30.17%, total mineralization is 5 × 10
4mg/L.
It is composite that Paraffin Removal composition of the present invention utilizes alkylphenol polyoxyethylene, polyoxyethylene sorbitan carboxylic ester and fatty alcohol-polyoxyethylene ether to carry out, and utilize the hydrotropy effect of ethers solubility promoter and sequestrant, improve the speed of paraffin dissolution and the inhibiting rate for wax precipitation of water-soluble wax removing agent.In use can not volatilize irritant gas, to human body and environment all safer, in use also can not combustion explosion.And water-soluble wax removing agent of the present invention, close to neutrality, can not cause corrosion to oil production equipment.
Water-soluble wax removing agent the speed of paraffin dissolution of the present invention reaches more than 0.020g/min, and inhibiting rate for wax precipitation reaches more than 71%, effectively can prevent oil well paraffinication, has good Paraffin Removal effect.Water-soluble wax removing agent density of the present invention is greater than 0.95g/cm
3, can add from sleeve pipe high-water-cut oil-producing well, and easily be sunken to shaft bottom, very easy to use.
Embodiment
Technical scheme of the present invention is described in detail below in conjunction with specific embodiment.
Embodiment 1
The Paraffin Removal composition of the present embodiment is made up of the component of following weight: alkylphenol polyoxyethylene 8 parts, polyoxyethylene sorbitan carboxylic ester 4 parts, fatty alcohol-polyoxyethylene ether 8 parts, ethylene glycol ethyl ether 20 parts, tripoly phosphate sodium STPP 4 parts.
In the present embodiment, alkylphenol polyoxyethylene is octyl phenol polyoxyethylene (9) ether, and namely in its molecular structure, alkyl carbon chain lengths is 8, the polyoxyethylated polymerization degree is 9.
In the present embodiment, polyoxyethylene sorbitan carboxylic ester is polyoxyethylene (20) sorbitol anhydride 11 carbocyclic aliphatic acid esters, and namely in its molecular structure, polyoxyethylated polymerization degree sum is 20, and the carbon chain lengths of lipid acid is 11.
In the present embodiment, fatty alcohol-polyoxyethylene ether is Lauryl Alcohol polyoxyethylene (15) ether, and namely in its molecular structure, fatty alcohol carbon chain lengths is 12, the polyoxyethylated polymerization degree is 15.
The water-soluble wax removing agent of the present embodiment is made up of the component of following weight percent: octyl phenol polyoxyethylene (9) ether 8%, polyoxyethylene (20) sorbitol anhydride 11 carbocyclic aliphatic acid esters 4%, Lauryl Alcohol polyoxyethylene (15) ether 8%, ethylene glycol ethyl ether 20%, tripoly phosphate sodium STPP 4%, surplus is deionized water.
The preparation method of the water-soluble wax removing agent of the present embodiment comprises the steps:
Get 8 parts, octyl phenol polyoxyethylene (9) ether, polyoxyethylene (20) sorbitol anhydride 11 carbocyclic aliphatic acid esters 4 parts, 8 parts, Lauryl Alcohol polyoxyethylene (15) ether, ethylene glycol ethyl ether 20 parts, tripoly phosphate sodium STPP 4 parts, add in 56 parts of deionized waters, obtain described water-soluble wax removing agent.
Embodiment 2
The water-soluble wax removing agent of the present embodiment is made up of the component of following weight percent: alkylphenol polyoxyethylene 9%, polyoxyethylene (20) sorbitan carboxylic esters 5%, fatty alcohol-polyoxyethylene ether 12%, butyl glycol ether 23%, Sodium hexametaphosphate 99 5%, surplus is deionized water.
In the present embodiment, alkylphenol polyoxyethylene is octyl phenol polyoxyethylene (13) ether, and namely in its molecular structure, alkyl carbon chain lengths is 8, the polyoxyethylated polymerization degree is 13.
In the present embodiment, polyoxyethylene sorbitan carboxylic ester is polyoxyethylene (20) sorbitol anhydride 15 carbocyclic aliphatic acid esters, and namely in its molecular structure, polyoxyethylated polymerization degree sum is 20, and the carbon chain lengths of lipid acid is 15.
In the present embodiment, fatty alcohol-polyoxyethylene ether is 16 carbon alcohol polyoxyethylene (18) ethers, and namely in its molecular structure, fatty alcohol carbon chain lengths is 16, the polyoxyethylated polymerization degree is 18.
The preparation method of the water-soluble wax removing agent of the present embodiment comprises the steps:
Get 9 parts, octyl phenol polyoxyethylene (13) ether, polyoxyethylene (20) sorbitol anhydride 15 carbocyclic aliphatic acid esters 5 parts, 16 12 parts, carbon alcohol polyoxyethylene (18) ethers, butyl glycol ether 23 parts, Sodium hexametaphosphate 99 5 parts, add in 46 parts of deionized waters, obtain described water-soluble wax removing agent.
Embodiment 3
The water-soluble wax removing agent of the present embodiment is made up of the component of following weight percent: alkylphenol polyoxyethylene 12%, polyoxyethylene (20) sorbitan carboxylic esters 6%, fatty alcohol-polyoxyethylene ether 10%, propylene glycol monomethyl ether 30%, trisodium phosphate 6%, and surplus is simulation salt solution.
In the present embodiment, alkylphenol polyoxyethylene is Nonyl pheno (15) ether, and namely in its molecular structure, alkyl carbon chain lengths is 9, the polyoxyethylated polymerization degree is 15.
In the present embodiment, polyoxyethylene sorbitan carboxylic ester is polyoxyethylene (20) sorbitol anhydride ten seven-carbon fatty acid ester, and namely in its molecular structure, polyoxyethylated polymerization degree sum is 20, and the carbon chain lengths of lipid acid is 17.
In the present embodiment, fatty alcohol-polyoxyethylene ether is octadecanol polyoxyethylene (20) ether, and namely in its molecular structure, fatty alcohol carbon chain lengths is 18, the polyoxyethylated polymerization degree is 20.
The component that salt solution comprises following weight percent is simulated: NaCl4.06%, CaCl in the present embodiment
20.59%, MgCl
20.18%, NaHCO
30.17%, the total mineralization of described simulation salt solution is 5 × 10
4mg/L.
The preparation method of the water-soluble wax removing agent of the present embodiment comprises the steps:
Get 12 parts, Nonyl pheno (15) ether, polyoxyethylene (20) sorbitol anhydride ten seven-carbon fatty acid ester 6 parts, 12 parts, octadecanol polyoxyethylene (20) ether, propylene glycol monomethyl ether 30 parts, trisodium phosphate 6 parts, add in 36 parts of simulation salt solution, obtain described water-soluble wax removing agent.
Described simulation salt solution comprises the component of following weight percent: NaCl4.06%, CaCl
20.59%, MgCl
20.18%, NaHCO
30.17%, the total mineralization of described simulation salt solution is 5 × 10
4mg/L.
Comparative example
The oil soluble wax removing agent of this comparative example is made up of the component of following weight percent: No. 150 solvent oils 90%, butyl 10%.
Experimental example
By the oil soluble wax removing agent obtained in the water-soluble wax removing agent product obtained in embodiment 1-3 and comparative example, according to the density of the working method test products in " GB/T2013-2010 liquid petrochemical products densitometry ", according to the flash-point of the working method test products in " GB/T27847-2011 Flash Point for Petroleum Products measure that Abel-Bin Siji remain silent agar diffusion method ", according to " SY/T6300-2009 recovers the oil with clear, paraffin inhibitor chemical technical qualification " in working method test No. 58 paraffin the speed of paraffin dissolution in the product, use the said products to test its inhibiting rate for wax precipitation to crude oil in certain oil field, in this crude oil, the content of paraffin is 18.75%, inhibiting rate for wax precipitation adopts formula (1) to calculate:
In formula:
E---inhibiting rate for wax precipitation, represents with percentage ratio;
M
0---do not add the wax deposition amount of wax removing agent oil sample, unit is gram (g);
M---add the wax deposition amount of wax removing agent oil sample, unit is gram (g).
Result is as shown in table 1.
Table 1 wax removing agent product performance measurement result
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example | |
| Density, g/cm 3 | 0.95 | 0.95 | 0.96 | 0.82 |
| Flash-point, DEG C | 42 | 44 | 45 | 32 |
| The speed of paraffin dissolution, g/min | 0.021 | 0.020 | 0.020 | 0.014 |
| Inhibiting rate for wax precipitation, % | 71.23 | 72.26 | 71.84 | 65.74 |
Can find out according to table 1, water-soluble wax removing agent the speed of paraffin dissolution of the present invention reaches more than 0.020g/min, and inhibiting rate for wax precipitation reaches more than 71%, effectively can prevent oil well paraffinication, has good Paraffin Removal effect.Water-soluble wax removing agent density of the present invention is greater than 0.95g/cm
3, can add from sleeve pipe high-water-cut oil-producing well, and easily be sunken to shaft bottom, very easy to use.
In addition, water-soluble wax removing agent use safety of the present invention, does not in use have the possibility of combustion explosion, and water-soluble wax removing agent of the present invention does not have acid, alkalescence, does not have corrodibility to oil production equipment.
Claims (9)
1. a Paraffin Removal composition, it is characterized in that, be made up of the component of following parts by weight: alkylphenol polyoxyethylene 8 ~ 12 parts, polyoxyethylene sorbitan carboxylic ester 4 ~ 6 parts, fatty alcohol-polyoxyethylene ether 8 ~ 12 parts, ethers solubility promoter 20 ~ 30 parts, sequestrant 4 ~ 6 parts.
2. Paraffin Removal composition as claimed in claim 1, is characterized in that, the alkyl carbon chain lengths of described alkylphenol polyoxyethylene is 8-9, the polyoxyethylated polymerization degree is 9-15.
3. Paraffin Removal composition as claimed in claim 1, it is characterized in that, in described polyoxyethylene sorbitan carboxylic ester, polyoxyethylated polymerization degree sum is 20, and the carbon chain lengths of lipid acid is 11-17.
4. Paraffin Removal composition as claimed in claim 1, is characterized in that, the fatty alcohol carbon chain lengths of described fatty alcohol-polyoxyethylene ether is 12-18, the polyoxyethylene polymerization degree is 9-15.
5. Paraffin Removal composition as claimed in claim 1, is characterized in that, described ethers solubility promoter is any one in ethylene glycol ethyl ether, butyl glycol ether, propylene glycol monomethyl ether.
6. Paraffin Removal composition as claimed in claim 1, is characterized in that, described sequestrant is any one in tripoly phosphate sodium STPP, Sodium hexametaphosphate 99, trisodium phosphate.
7. a water-soluble wax removing agent, it is characterized in that, be made up of the component of following weight percent: alkylphenol polyoxyethylene 8% ~ 12%, polyoxyethylene sorbitan carboxylic ester 4% ~ 6%, fatty alcohol-polyoxyethylene ether 8% ~ 12%, ethers solubility promoter 20% ~ 30%, sequestrant 4% ~ 6%, surplus is water.
8. water-soluble wax removing agent as claimed in claim 7, it is characterized in that, the alkyl carbon chain lengths of described alkylphenol polyoxyethylene is 8-9, the polyoxyethylated polymerization degree is 9-15, in described polyoxyethylene sorbitan carboxylic ester, polyoxyethylated polymerization degree sum is 20, the carbon chain lengths of lipid acid is 11-17, and the fatty alcohol carbon chain lengths of described fatty alcohol-polyoxyethylene ether is 12-18, the polyoxyethylene polymerization degree is 9-15.
9. a preparation method for water-soluble wax removing agent according to claim 7, is characterized in that, comprise the steps:
Get alkylphenol polyoxyethylene, polyoxyethylene sorbitan carboxylic ester, fatty alcohol-polyoxyethylene ether, ethers solubility promoter, sequestrant be added to the water, obtain described water-soluble wax removing agent.
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| WO2018053248A1 (en) * | 2016-09-16 | 2018-03-22 | Ecolab Usa Inc. | Fatty alcohols and esters for crude oil treatment |
| CN108467717A (en) * | 2018-04-26 | 2018-08-31 | 威海翔泽新材料科技有限公司 | Water based dewaxing agent and preparation method thereof |
| CN108722981A (en) * | 2018-04-20 | 2018-11-02 | 朱清 | A kind of method of paraffin in quick removing dewatering box |
| US10487278B2 (en) | 2016-02-17 | 2019-11-26 | Ecolab Usa Inc. | Alkyl diols for crude oil treatment |
| CN113604207A (en) * | 2021-09-10 | 2021-11-05 | 陕西延长石油油田化学科技有限责任公司 | Cleaning paraffin remover for oil field and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10487278B2 (en) | 2016-02-17 | 2019-11-26 | Ecolab Usa Inc. | Alkyl diols for crude oil treatment |
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| CN108722981B (en) * | 2018-04-20 | 2021-02-05 | 朱清 | Method for quickly removing paraffin in dehydration box |
| CN108467717A (en) * | 2018-04-26 | 2018-08-31 | 威海翔泽新材料科技有限公司 | Water based dewaxing agent and preparation method thereof |
| CN113604207A (en) * | 2021-09-10 | 2021-11-05 | 陕西延长石油油田化学科技有限责任公司 | Cleaning paraffin remover for oil field and preparation method thereof |
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