CN105419756B - A kind of Paraffin Removal composition, water-soluble Wax removing agent and preparation method thereof - Google Patents
A kind of Paraffin Removal composition, water-soluble Wax removing agent and preparation method thereof Download PDFInfo
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- CN105419756B CN105419756B CN201510714168.3A CN201510714168A CN105419756B CN 105419756 B CN105419756 B CN 105419756B CN 201510714168 A CN201510714168 A CN 201510714168A CN 105419756 B CN105419756 B CN 105419756B
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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 kind of Paraffin Removal compositions, water-soluble Wax removing agent and preparation method thereof, belong to technical field of petroleum extraction.The Paraffin Removal composition is grouped as by the group of following parts by weight：8~12 parts of alkyl phenol polyoxyethylene ether, 4~6 parts of polyoxyethylene sorbitan carboxylic ester, 8~12 parts of fatty alcohol polyoxyethylene ether, 20~30 parts of ethers cosolvent, 4~6 parts of chelating agent.The water-soluble Wax removing agent the speed of paraffin dissolution that the present invention obtains reaches 0.020g/min or more, and inhibiting rate for wax precipitation reaches 71% or more, and density is more than 0.95g/cm3, there is good Paraffin Removal effect, it is very easy to use.
Description
Technical field
The present invention relates to a kind of Paraffin Removal compositions, water-soluble Wax removing agent and preparation method thereof, belong to oil exploitation skill
Art field.
Background technology
In oil extraction field, it can all contain a certain amount of wax in crude oil under normal conditions, in crude oil in the earth formation
Wax usually exists with dissolved state, and still, during crude oil production, the crude oil liquid of oil well output is exploited and defeated under stratum
It being sent on ground, the temperature of crude oil liquid and suffered pressure constantly decline, when crude oil liquid temperature is less than the fusing point of wax therein,
Wax starts crystallization and is precipitated, and the wax of precipitation can be deposited on R a T inner wall, and sucker rod overload, oil pipe blocking etc. is caused to ask
Topic, causes well oil output to decline.
To ensure oily well yield and production efficiency, prevent the method for paraffin deposit from mainly having machinery in crude oil production at present
Wax removal, heating power Paraffin Removal and chemical agent Paraffin Removal etc..Mechanical paraffin removal and heating power wax removal can effectively remove the stone deposited in oil well
Wax, but oil well must stop production when both methods operation, and also energy consumption is larger, and wherein there is also dirts for heating power wax removal mode
The defects of contaminating stratum, especially when strata pressure is relatively low, heating power wax removal also results in flushing fluid and pours in down a chimney phenomenon, influences just
Often production.The shortcomings that chemical agent Paraffin Removal technology can overcome above two method and wax removal effect it is good and with very good
Market application prospect.
The Wax removing agent that paraffin removing with chemical method uses mainly has oil-base paraffin remover and water based dewaxing agent, oil-base paraffin remover wax removal effect
Rate is high, but irritant smell, volatile, and inflammable and explosive also has larger toxicity, safety poor.
Invention content
The purpose of the present invention is to provide a kind of safe Paraffin Removal compositions.The present invention also aims to provide
A kind of water solubility Wax removing agent and preparation method thereof.
In order to achieve the goal above, the technical solution of the Paraffin Removal composition of the present invention is as follows：
A kind of Paraffin Removal composition, is grouped as by the group of following parts by weight：8~12 parts of alkyl phenol polyoxyethylene ether is gathered
4~6 parts of ethylene oxide sorbitan carboxylic esters, 8~12 parts of fatty alcohol polyoxyethylene ether, 20~30 parts of ethers cosolvent, chelating
4~6 parts of agent.
Alkyl phenol polyoxyethylene ether, polyoxyethylene sorbitan carboxylic ester and fat in the Paraffin Removal composition of the present invention
Fat alcohol polyoxyethylene ether can play the role of wettability reversal, so that wax deposition surface is reversed to water-wetted surface by oil-wetted surface, favorably
In falling off for wax.The osmosis of these types of substance can be such that the cohesion between wax molecule and tube wall weakens simultaneously, consequently facilitating will
It is removed from tube wall.Ethers cosolvent can increase the mutual solubility of oil and water, and wax crystalline substance is promoted to dissolve and enter in oil stream.
Chelating agent is alkaline matter, can be generated water-soluble product with the asphalitine isopolarity substance reaction in wax, chelate simultaneously
Agent can also be with the Ca in water2+、Mg2+Chelation occurs, plays the role of scale inhibition.
Abovementioned alkyl phenol polyethenoxy ether, polyoxyethylene sorbitan carboxylic ester and fatty alcohol polyoxyethylene ether are existing
There are substance, the present invention to be applied in water-soluble Paraffin Removal technical field, primarily to improving the molten wax of Paraffin Removal composition
Efficiency improves Paraffin Removal effect.In order to further increase molten wax effect, each component can be into Paraffin Removal composition of the invention
Row is following preferred：
The alkyl phenol polyoxyethylene ether has the following structure general formula：
Wherein, the value that the value of n is preferably 8~9, m is preferably 9~15, i.e., the carbochain of alkyl in alkyl phenol polyoxyethylene ether
Length is preferably 8~9, and the polyoxyethylated degree of polymerization is preferably 9~15.
The general structure of the polyoxyethylene sorbitan carboxylic ester is：
Wherein, x+y+z+w=20 in molecular structure, i.e. the sum of polyoxyethylene degree of polymerization of each position are that the value of 20, m is preferred
It is 11~17, i.e., the carbon chain lengths of aliphatic acid are preferably 11~17 in molecular structure.
The general structure of the fatty alcohol polyoxyethylene ether is：
Wherein, the value that the value of a is preferably 12~18, b is preferably 15~20, i.e., fatty alcohol in fatty alcohol polyoxyethylene ether
Carbon chain lengths are preferably 12~18, and the polyoxyethylated degree of polymerization is preferably 15~20.
The technical solution of the water-soluble Wax removing agent of the present invention is as follows：
A kind of water solubility Wax removing agent, by forming following weight percentage components：Alkyl phenol polyoxyethylene ether 8%~
12%, polyoxyethylene sorbitan carboxylic ester 4%~6%, fatty alcohol polyoxyethylene ether 8%~12%, ethers cosolvent
20%~30%, chelating agent 4%~6%, surplus are water or simulation brine.
The technical solution of the preparation method of the water-soluble Wax removing agent of the present invention is as follows：
A kind of preparation method of water solubility Wax removing agent, which is characterized in that include the following steps：
Take alkyl phenol polyoxyethylene ether, polyoxyethylene sorbitan carboxylic ester, fatty alcohol polyoxyethylene ether, ethers hydrotropy
Agent, chelating agent are added in water or simulation brine, after evenly mixing up to the water-soluble Wax removing agent.
In order to make to play better wax removal effect, Paraffin Removal composition of the invention, water-soluble Wax removing agent i.e. its system
In Preparation Method, the alkyl phenol polyoxyethylene ether, polyoxyethylene sorbitan carboxylic ester, fatty alcohol polyoxyethylene ether, ethers
The weight ratio of cosolvent and calgon is preferably 2:1:2:5:1.
In order to further promote alkyl phenol polyoxyethylene ether, polyoxyethylene sorbitan carboxylic ester, fatty alcohol polyoxy second
The dissolving of alkene ether, in Paraffin Removal composition of the invention, water-soluble Wax removing agent, that is, preparation method, the ethers cosolvent is excellent
It is selected as ethylene glycol ethyl ether, butyl glycol ether or propylene glycol monomethyl ether.
In order to further promote the asphalitine isopolarity substance reaction in chelating agent and wax, water-soluble product is generated,
Promote chelating agent and the Ca in water simultaneously2+、Mg2+Chelation occurs, plays the role of scale inhibition, Paraffin Removal of the invention combination
In object, water-soluble Wax removing agent and preparation method thereof, the chelating agent is preferably sodium tripolyphosphate, calgon or pyrophosphoric acid
Sodium.
Due to being frequently present of various salinities in the stratum water environment residing for oil well, when the amount for the Wax removing agent being added in oil well
When larger, Wax removing agent is highly susceptible to the influence of stratum water environment, in order to avoid oil-well strata environment makes Wax removing agent
It is impacted with effect, the water in water-soluble Wax removing agent of the invention and preparation method thereof can use simulation brine, the mould
The ground environment in the oil field that quasi- brine can be actually used according to Wax removing agent is prepared.For example, root in the embodiment of the present invention 3
According to the salt content of the stratum water environment of certain oil well measured, the simulation brine of preparation includes following weight percentage components：
NaCl 4.06%, CaCl20.59%, MgCl20.18%, NaHCO30.17%, total salinity is 5 × 104mg/L。
The Paraffin Removal composition of the present invention utilizes alkyl phenol polyoxyethylene ether, polyoxyethylene sorbitan carboxylic ester and fat
Fat alcohol polyoxyethylene ether is compounded, and using the dissolution assistant effect of ethers cosolvent and chelating agent, improves water-soluble Paraffin Removal
The speed of paraffin dissolution and inhibiting rate for wax precipitation of agent.Will not volatilize irritative gas in use, all relatively safer to human body and environment,
It will not combustion explosion during use.Moreover, the present invention water-soluble Wax removing agent close to neutrality, will not be to oil production equipment
It causes to corrode.
The water-soluble Wax removing agent the speed of paraffin dissolution of the present invention reaches 0.020g/min or more, and inhibiting rate for wax precipitation reaches 71% or more,
It can be effectively prevent oil well paraffinication, there is good Paraffin Removal effect.The water-soluble Wax removing agent density of the present invention is more than
0.95g/cm3, high-water-cut oil-producing well can be added from casing, and be easily sunken to shaft bottom, it is very easy to use.
Specific implementation mode
With reference to the specific embodiment technical solution that the present invention will be described in detail.
Embodiment 1
The Paraffin Removal composition of the present embodiment is grouped as by the group of following weight：8 parts of alkyl phenol polyoxyethylene ether, polyoxy second
4 parts of alkene sorbitan carboxylic esters, 8 parts of fatty alcohol polyoxyethylene ether, 20 parts of ethylene glycol ethyl ether, 4 parts of sodium tripolyphosphate.
Alkyl phenol polyoxyethylene ether is octylphenol polyethylene ethylene oxide (9) ether, i.e. alkyl carbon in its molecular structure in the present embodiment
Chain length is 8, the polyoxyethylated degree of polymerization is 9.
Polyoxyethylene sorbitan carboxylic ester is 11 carbon fatty acid of polyoxyethylene (20) sorbitol anhydride in the present embodiment
Ester, i.e., in its molecular structure, the sum of polyoxyethylated degree of polymerization is 20, and the carbon chain lengths of aliphatic acid are 11.
Fatty alcohol polyoxyethylene ether is Lauryl Alcohol polyoxyethylene (15) ether in the present embodiment, i.e., fatty in its molecular structure
Alcohol carbon chain lengths are 12, the polyoxyethylated degree of polymerization is 15.
The water-soluble Wax removing agent of the present embodiment consists of the following components in percentage by weight：Octylphenol polyethylene ethylene oxide (9)
Ether 8%, 11 carbocyclic aliphatic acid esters 4% of polyoxyethylene (20) sorbitol anhydride, Lauryl Alcohol polyoxyethylene (15) ether 8%, ethylene glycol
Ether 20%, sodium tripolyphosphate 4%, surplus are deionized water.
The preparation method of the water-soluble Wax removing agent of the present embodiment includes the following steps：
Take 8 parts of octylphenol polyethylene ethylene oxide (9) ether, 4 parts of 11 carbocyclic aliphatic acid esters of polyoxyethylene (20) sorbitol anhydride, 12 carbon
8 parts of alcohol polyoxyethylene (15) ether, 20 parts of ethylene glycol ethyl ether, 4 parts of sodium tripolyphosphate are added in 56 parts of deionized waters to get described
Water-soluble Wax removing agent.
Embodiment 2
The water-soluble Wax removing agent of the present embodiment consists of the following components in percentage by weight：Alkyl phenol polyoxyethylene ether
9%, polyoxyethylene (20) sorbitan carboxylic esters 5%, fatty alcohol polyoxyethylene ether 12%, butyl glycol ether 23%, six are inclined
Sodium phosphate 5%, surplus are deionized water.
Alkyl phenol polyoxyethylene ether is octylphenol polyethylene ethylene oxide (13) ether, i.e. alkyl carbon in its molecular structure in the present embodiment
Chain length is 8, the polyoxyethylated degree of polymerization is 13.
Polyoxyethylene sorbitan carboxylic ester is 15 carbon fatty acid of polyoxyethylene (20) sorbitol anhydride in the present embodiment
Ester, i.e., in its molecular structure, the sum of polyoxyethylated degree of polymerization is 20, and the carbon chain lengths of aliphatic acid are 15.
Fatty alcohol polyoxyethylene ether is 16 carbon alcohol polyoxyethylene (18) ethers in the present embodiment, i.e., fatty in its molecular structure
Alcohol carbon chain lengths are 16, the polyoxyethylated degree of polymerization is 18.
The preparation method of the water-soluble Wax removing agent of the present embodiment includes the following steps：
Take 9 parts of octylphenol polyethylene ethylene oxide (13) ether, 5 parts of 15 carbocyclic aliphatic acid esters of polyoxyethylene (20) sorbitol anhydride, 16
12 parts of carbon alcohol polyoxyethylene (18) ether, 23 parts of butyl glycol ether, 5 parts of calgon are added in 46 parts of deionized waters to get institute
State water-soluble Wax removing agent.
Embodiment 3
The water-soluble Wax removing agent of the present embodiment consists of the following components in percentage by weight：Alkyl phenol polyoxyethylene ether
12%, polyoxyethylene (20) sorbitan carboxylic esters 6%, fatty alcohol polyoxyethylene ether 10%, propylene glycol monomethyl ether 30%, burnt phosphorus
Sour sodium 6%, surplus are simulation brine.
Alkyl phenol polyoxyethylene ether is Nonyl pheno (15) ether, i.e. alkyl carbon in its molecular structure in the present embodiment
Chain length is 9, the polyoxyethylated degree of polymerization is 15.
Polyoxyethylene sorbitan carboxylic ester is ten seven-carbon fatty acid of polyoxyethylene (20) sorbitol anhydride in the present embodiment
Ester, i.e., in its molecular structure, the sum of polyoxyethylated degree of polymerization is 20, and the carbon chain lengths of aliphatic acid are 17.
Fatty alcohol polyoxyethylene ether is octadecanol polyoxyethylene (20) ether in the present embodiment, i.e., fatty in its molecular structure
Alcohol carbon chain lengths are 18, the polyoxyethylated degree of polymerization is 20.
It includes following components in percentage by weight that brine is simulated in the present embodiment：NaCl 4.06%, CaCl20.59%,
MgCl20.18%, NaHCO30.17%, the total salinity of the simulation brine is 5 × 104mg/L。
The preparation method of the water-soluble Wax removing agent of the present embodiment includes the following steps：
Take 12 parts of Nonyl pheno (15) ether, 6 parts of ten seven-carbon fatty acid ester of polyoxyethylene (20) sorbitol anhydride, 18
12 parts of carbon alcohol polyoxyethylene (20) ether, 30 parts of propylene glycol monomethyl ether, 6 parts of sodium pyrophosphate are added in 36 parts of simulation brine to get described
Water-soluble Wax removing agent.
The simulation brine includes following components in percentage by weight：NaCl 4.06%, CaCl20.59%, MgCl2
0.18%, NaHCO30.17%, the total salinity of the simulation brine is 5 × 104mg/L。
Comparative example
The oil-soluble Wax removing agent of this comparative example consists of the following components in percentage by weight：No. 150 solvent naphthas 90%, two
Butyl glycol ether 10%.
Experimental example
The oil-soluble Wax removing agent that will be obtained in the water-soluble Wax removing agent product and comparative example that are obtained in embodiment 1-3,
According to《GB/T 2013-2010 liquid petrochemical products densitometries》In operating method test product density, according to
《GB/T 27847-2011 Flash Point for Petroleum Products measures the silent agar diffusion methods of Abel-Bin Siji》In operating method test product
Flash-point, according to《SY/T 6300-2009 recover the oil with clear, wax-proofing agent technical conditions》In operating method test No. 58 paraffin producing
The speed of paraffin dissolution in product tests its inhibiting rate for wax precipitation to crude oil in certain oil field using the said goods, and the content of paraffin is in the crude oil
18.75%, inhibiting rate for wax precipitation is calculated using formula (1)：
In formula：
E --- inhibiting rate for wax precipitation is indicated with percentage；
m0--- not plus the wax deposition amount of Wax removing agent oil sample, unit are gram (g)；
M --- it is gram (g) to add the wax deposition amount of Wax removing agent oil sample, unit.
The results are shown in Table 1.
1 Wax removing agent properties of product measurement result of table
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example | |
| Density, g/cm3 | 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 |
According to table 1 as can be seen that the water-soluble Wax removing agent the speed of paraffin dissolution of the present invention reaches 0.020g/min or more, wax control
Rate reaches 71% or more, can effectively prevent oil well paraffinication, has good Paraffin Removal effect.The water-soluble Paraffin Removal of the present invention
Agent density is more than 0.95g/cm3, high-water-cut oil-producing well can be added from casing, and be easily sunken to shaft bottom, it is very easy to use.
In addition, the water-soluble Wax removing agent of the present invention is safe to use, the not no possibility of combustion explosion in use, and
And the water-soluble Wax removing agent of the present invention does not have acid, alkalinity, does not have corrosivity to oil production equipment.
Claims (7)
1. a kind of Paraffin Removal composition, which is characterized in that be grouped as by the group of following parts by weight：Alkyl phenol polyoxyethylene ether 8
~12 parts, 4~6 parts of polyoxyethylene sorbitan carboxylic ester, 8~12 parts of fatty alcohol polyoxyethylene ether, ethers cosolvent 20~
30 parts, 4~6 parts of chelating agent；The alkyl carbon chain lengths of the alkyl phenol polyoxyethylene ether are 8-9, the polyoxyethylated degree of polymerization is
9-15；The chelating agent is any one in sodium tripolyphosphate, calgon, sodium pyrophosphate.
2. Paraffin Removal composition as described in claim 1, which is characterized in that the polyoxyethylene sorbitan carboxylic ester
In, the sum of polyoxyethylated degree of polymerization is 20, and the carbon chain lengths of aliphatic acid are 11-17.
3. Paraffin Removal composition as described in claim 1, which is characterized in that the fatty alcohol carbon of the fatty alcohol polyoxyethylene ether
Chain length is 12-18, the polyoxyethylene degree of polymerization is 9-15.
4. Paraffin Removal composition as described in claim 1, which is characterized in that the ethers cosolvent is ethylene glycol ethyl ether, second
Any one in glycol butyl ether, propylene glycol monomethyl ether.
5. a kind of water solubility Wax removing agent, which is characterized in that by forming following weight percentage components：Alkylphenol-polyethenoxy
Ether 8%~12%, polyoxyethylene sorbitan carboxylic ester 4%~6%, fatty alcohol polyoxyethylene ether 8%~12%, ethers cosolvent
20%~30%, chelating agent 4%~6%, surplus are water；The alkyl carbon chain lengths of the alkyl phenol polyoxyethylene ether are 8-9, polyoxy second
The degree of polymerization of alkene is 9-15；The chelating agent is any one in sodium tripolyphosphate, calgon, sodium pyrophosphate.
6. water solubility Wax removing agent as claimed in claim 5, which is characterized in that the polyoxyethylene sorbitan carboxylic ester
In, the sum of polyoxyethylated degree of polymerization is 20, and the carbon chain lengths of aliphatic acid are 11-17, the fat of the fatty alcohol polyoxyethylene ether
Fat alcohol carbon chain lengths are 12-18, the polyoxyethylene degree of polymerization is 9-15.
7. a kind of preparation method of the water-soluble Wax removing agent described in claim 5, which is characterized in that include the following steps：
Take alkyl phenol polyoxyethylene ether, polyoxyethylene sorbitan carboxylic ester, fatty alcohol polyoxyethylene ether, ethers cosolvent,
Chelating agent is added to the water to get the water-soluble Wax removing agent.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG11201806673QA (en) | 2016-02-17 | 2018-09-27 | Ecolab Usa Inc | Alkyl diols for crude oil treatment |
| CA3036559A1 (en) | 2016-09-16 | 2018-03-22 | Ecolab Usa Inc. | Fatty alcohols and esters for crude oil treatment |
| CN108722981B (en) * | 2018-04-20 | 2021-02-05 | 朱清 | Method for quickly removing paraffin in dehydration box |
| CN108467717B (en) * | 2018-04-26 | 2020-10-02 | 威海翔泽新材料科技有限公司 | Water-based paraffin removal and prevention 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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