CN106522885A - Wax removing method for oil well in oil extraction process - Google Patents
Wax removing method for oil well in oil extraction process Download PDFInfo
- Publication number
- CN106522885A CN106522885A CN201611193480.3A CN201611193480A CN106522885A CN 106522885 A CN106522885 A CN 106522885A CN 201611193480 A CN201611193480 A CN 201611193480A CN 106522885 A CN106522885 A CN 106522885A
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- Prior art keywords
- parts
- well
- oil
- wax removing
- injected
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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, limiting or eliminating the deposition of paraffins or like substances
-
- 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B37/02—Scrapers specially adapted therefor
Abstract
The invention discloses a wax removing method for an oil well in an oil extraction process. The wax removing method for the oil well in the oil extraction process comprises the following steps that A, a dissolving solution is injected into the well, then steam is injected into the well, and the well is closed for 5-8 hours; B, a cleaning solution is injected into the well, wax removing treatment is conducted in the well through a wax removing shuttle at the same time, and after cleaning through the wax removing shuttle is completed, the cleaning solution is kept being injected into the well for 2-3 hours; and C, after injection of the cleaning solution is stopped, the interior of the well is cleaned through crude oil, then retarding fluid is injected into the well, the well is closed for 5-8 hours, and then the well is opened for normal work. By adoption of the wax removing method for the oil well in the oil extraction process, defects of the prior art can be overcome, the using amount of a wax removing agent is reduced on the premise that the wax removing effect is guaranteed, and the well-closing production halt time for wax removing of the oil well is shortened.
Description
Technical field
The present invention relates in oil recovery technique field, especially a kind of oil recovery process oil well dewaxing method.
Background technology
Oil well paraffinication is oil field common problem, and the higher oil field of wax content, the phenomenon of oil well paraffinication are more serious.Oil
The ceride of Tanaka is the mixture of various long chain alkanes, and as temperature is higher in oil reservoir, ceride is dissolved in crude oil, with
Crude oil to be collected up, temperature drop, wherein the ceride for dissolving gradually is separated out, be attached in oil well, form wax deposition.Existing skill
In art, in addition to the method for carrying out mechanical paraffin removal except going into the well using paraffin cleaning shuttle, paraffin remover also in common use enters to the wax deposition in oil well
Row dissolving is removed.But, existing paraffin remover be all by dissolving to ceride, ceride is directly dissolved in paraffin remover,
So as to realize the removing for wax deposition.This method is big for the usage amount of paraffin remover, not only high cost, and for oil reservoir has
More serious pollution.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of dewaxing method of oil well in oil recovery process, can solve the problem that existing
The deficiency of technology, on the premise of wax removal effect is ensured, reduces the usage amount of paraffin remover, and shortens oil well to carry out
Wax removal and close well stopping production time.
To solve above-mentioned technical problem, the technical solution used in the present invention is as follows.
In a kind of oil recovery process, the dewaxing method of oil well, comprises the following steps：
A, inject lysate into well, be then injected into steam, close well 5～8 hours；
B, inject cleaning fluid into well, at the same time cleaned out in paraffin cleaning shuttle to wax removal process is carried out in well using paraffin cleaning shuttle
Afterwards, continue to keep injection cleaning fluid 2～3 hours；
After C, stopping injection cleaning fluid, using crude oil to cleaning in well, slow setting liquid is then injected into, closes well 5～8 hours, so
After drive a well normal operation..
Preferably, following number is parts by weight；
In step A, lysate includes following component,
70～90 parts of octadecylamine APEO, 35～45 parts of dimethyl diallyl ammonium chloride, 50～55 parts of glycerine
Three esters, 12～15 parts of 3,5- xylenols；5～10 parts of 3,4- dimethoxy nitrobenzene, 25～40 parts of 4- dimethylamine
Base butyraldehyde dimethyl acetal, 50～80 parts of sodium chloride, 10～15 parts of sulfuric acid, 200～300 parts of crude oil, 200～300 parts
Ethanol, 100～150 parts of water.
Preferably, in step A, vapor (steam) temperature is controlled at 125～130 DEG C.
Preferably, following number is parts by weight；
In step B, cleaning fluid includes following component,
45～55 parts of 2- chloroethoxy -2- ethyoxyl diethanols, 23～30 parts to toluene methyl ether, 5～8 parts of dioctyl first
Amine, 15～20 parts of 2,3- pentanediones, 30～40 parts of malonic acid methyl-benzyl ester, 120～150 parts of toluene, 50～70 parts
Acetone.
Preferably, following number is parts by weight；
In step C, slow setting liquid includes following component,
80～100 parts of 3- amino-2-methyl methyl benzoates, 50～70 parts of 4- trimethylanilines, 20～30 parts of 4-N-
Butyl phenyl ether formonitrile HCN, 5～8 parts of 4- tert-butyl benzene ketones, 20～40 parts of 2- tolyl aldehydes, 300～500 parts of crude oil.
Using the beneficial effect brought by above-mentioned technical proposal it is：The present invention does not use paraffin remover pair in prior art
The method that wax deposition layer directly dissolves, but using dimethyl diallyl ammonium chloride in lysate and triglycerides in hot environment
Lower and ceride forms polymer, the characteristics of easily being dissolved each other with 4- dimethylamino butyraldehyde dimethyl acetals using which so that ceride is molten
Decompose in the presence of solution liquid rapidly, then the wax deposition in oil well is quickly removed using paraffin cleaning shuttle.While removing, profit
The ceride peeled off is washed away with cleaning fluid, improve the elimination effect of paraffin cleaning shuttle, shorten the wax removal time.In cleaning fluid to first
The methyl phenyl ethers anisole solute effect good for long chain alkane has, dioctylmethylamine are used to prevent the ceride for dissolving from separating out again knot
It is brilliant.Malonic acid methyl-benzyl ester can improve toluene methyl ether stability at high temperature.Slow setting liquid is for the oil well after wax removal
Precuring is carried out, 3- amino-2-methyls methyl benzoate and 4-N- butyl phenyl ethers formonitrile HCN form layer protective layer, wax in the borehole wall
Fat cannot form firm attachment contact surface in 3- amino-2-methyls methyl benzoate, so that the ceride of new crystallization is easy
Remove.
The dewaxing method of the present invention can be thoroughly removed to the wax deposition in well after a wax removal operation is carried out,
And in the General Maintenance in later stage, greatly reduce the time required to directly carrying out wax removal operation, wax removal using paraffin cleaning shuttle.On
The implementation cycle for stating complete wax removal operation is 9～12 months, can be substantially reduced due to wax removal and caused when closing well and stopping production
Between.
Specific embodiment
Embodiment 1
In a kind of oil recovery process, the dewaxing method of oil well, comprises the following steps：
A, inject lysate into well, be then injected into steam, close well 6 hours；
B, inject cleaning fluid into well, at the same time cleaned out in paraffin cleaning shuttle to wax removal process is carried out in well using paraffin cleaning shuttle
Afterwards, continue to keep injection cleaning fluid 2 hours；
After C, stopping injection cleaning fluid, using crude oil to cleaning in well, slow setting liquid is then injected into, closes well 6 hours, Ran Houkai
Well normal operation.
Following number is parts by weight；
In step A, lysate includes following component,
85 parts of octadecylamine APEO, 42 parts of dimethyl diallyl ammonium chloride, 50 parts of triglycerides, the 3 of 12 parts,
5- xylenols；6 parts of 3,4- dimethoxy nitrobenzene, 35 parts of 4- dimethylamino butyraldehyde dimethyl acetals, 75 parts of chlorination
Sodium, 14 parts of sulfuric acid, 300 parts of crude oil, 250 parts of ethanol, 150 parts of water.
In step A, vapor (steam) temperature is controlled at 125 DEG C.
In step B, cleaning fluid includes following component,
50 parts of 2- chloroethoxy -2- ethyoxyl diethanols, 25 parts to toluene methyl ether, 6 parts of dioctylmethylamine, 20 parts 2,
3- pentanediones, 35 parts of malonic acid methyl-benzyl ester, 145 parts of toluene, 55 parts of acetone.
In step C, slow setting liquid includes following component,
90 parts of 3- amino-2-methyl methyl benzoates, 60 parts of 4- trimethylanilines, 25 parts of 4-N- butyl phenyl ether formonitrile HCNs, 7
The 4- tert-butyl benzene ketones of part, 25 parts of 2- tolyl aldehydes, 300 parts of crude oil.
Embodiment 2
The present embodiment is to improve to come on the basis of embodiment 1.4'- trifluoromethyl diphenyl in slow setting liquid also including 5 parts-
4- formaldehyde, 4'- trifluoromethyl diphenyl -4- formaldehyde can improve adhesiveness of the slow setting liquid in the borehole wall, extend 3- amino -2- first
The term of validity of the protective layer formed by yl benzoic acid methyl esters and 4-N- butyl phenyl ether formonitrile HCNs.
Embodiment 3
The present embodiment is to improve to come on the basis of embodiment 2.When the General Maintenance cycle recovered the oil is through half, using original
20 times of cleaning solution dilution, the then cleaning fluid after use are carried out a well-flushing operation by oil.So can effectively suppress ceride
It is a large amount of to assemble, so as to accelerate the wax removal speed of paraffin cleaning shuttle during General Maintenance.Cleaning fluid is diluted by crude oil, can be reduced
Cleaning fluid improves oil-producing quality for the impact of oil reservoir.
Embodiment 4
The present embodiment is to improve to come on the basis of embodiment 3.P-ethylbenzoyl chloride in lysate also including 3 parts.It is right
Ethylamino benzonitrile acyl chlorides can decompose to the crystal structure of wax, so as to accelerate dimethyl diallyl ammonium chloride and glycerine three
Ester forms the speed of polymer in high temperature environments with ceride.
The contrast of 1 year is carried out using aforementioned four embodiment respectively in four mouthfuls of oil wells of Shengli Oil Field river mouth oil-producing region
Test, it is as a result as follows：
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |
| It is long that wax removal closes well total time-consuming（h） | 206 | 195 | 145 | 120 |
| Paraffin remover total cost（Wan Yuan） | 16.75 | 15.12 | 15.78 | 15.81 |
From above-mentioned data, dewaxing method provided by the present invention needs to close well up to a hundred times clear every year compared with prior art
Wax, average to need 5 hours every time, 2000 yuan of paraffin remover expenses, the present invention can substantially shorten due to wax removal and caused close well
Stop production, improve the oil production of oil well, reduce wax removal expense.
Foregoing description is only proposed as enforceable technical scheme of the invention, not as to the single of its technical scheme itself
Restrictive condition.
Claims (5)
1. in a kind of oil recovery process oil well dewaxing method, it is characterised in that comprise the following steps：
A, inject lysate into well, be then injected into steam, close well 5～8 hours；
B, inject cleaning fluid into well, at the same time cleaned out in paraffin cleaning shuttle to wax removal process is carried out in well using paraffin cleaning shuttle
Afterwards, continue to keep injection cleaning fluid 2～3 hours；
After C, stopping injection cleaning fluid, using crude oil to cleaning in well, slow setting liquid is then injected into, closes well 5～8 hours, so
After drive a well normal operation.
2. in oil recovery process according to claim 1 oil well dewaxing method, it is characterised in that：Following number is weight
Number；
In step A, lysate includes following component,
70～90 parts of octadecylamine APEO, 35～45 parts of dimethyl diallyl ammonium chloride, 50～55 parts of glycerine
Three esters, 12～15 parts of 3,5- xylenols；5～10 parts of 3,4- dimethoxy nitrobenzene, 25～40 parts of 4- dimethylamine
Base butyraldehyde dimethyl acetal, 50～80 parts of sodium chloride, 10～15 parts of sulfuric acid, 200～300 parts of crude oil, 200～300 parts
Ethanol, 100～150 parts of water.
3. in oil recovery process according to claim 2 oil well dewaxing method, it is characterised in that：In step A, vapor (steam) temperature
Control is at 125～130 DEG C.
4. in oil recovery process according to claim 1 oil well dewaxing method, it is characterised in that：Following number is weight
Number；
In step B, cleaning fluid includes following component,
45～55 parts of 2- chloroethoxy -2- ethyoxyl diethanols, 23～30 parts to toluene methyl ether, 5～8 parts of dioctyl first
Amine, 15～20 parts of 2,3- pentanediones, 30～40 parts of malonic acid methyl-benzyl ester, 120～150 parts of toluene, 50～70 parts
Acetone.
5. in oil recovery process according to claim 1 oil well selective water plugging method, it is characterised in that：Following number is equal
For parts by weight；
In step C, slow setting liquid includes following component,
80～100 parts of 3- amino-2-methyl methyl benzoates, 50～70 parts of 4- trimethylanilines, 20～30 parts of 4-N-
Butyl phenyl ether formonitrile HCN, 5～8 parts of 4- tert-butyl benzene ketones, 20～40 parts of 2- tolyl aldehydes, 300～500 parts of crude oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611193480.3A CN106522885A (en) | 2016-12-21 | 2016-12-21 | Wax removing method for oil well in oil extraction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611193480.3A CN106522885A (en) | 2016-12-21 | 2016-12-21 | Wax removing method for oil well in oil extraction process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106522885A true CN106522885A (en) | 2017-03-22 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611193480.3A Pending CN106522885A (en) | 2016-12-21 | 2016-12-21 | Wax removing method for oil well in oil extraction process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939341A (en) * | 2017-11-29 | 2018-04-20 | 大庆华营化工有限公司 | A kind of microbial wax control agent and preparation method thereof |
| CN110184041A (en) * | 2019-07-06 | 2019-08-30 | 西南石油大学 | A kind of oil-base paraffin remover that can be recycled |
| CN113006740A (en) * | 2021-04-27 | 2021-06-22 | 天津东拓油田技术服务有限公司 | Wellhead paraffin prevention mechanism and process |
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| CN1560175A (en) * | 2004-02-25 | 2005-01-05 | 石油大学(华东) | Clear type high-efficient paraffin removal agent |
| US20050034868A1 (en) * | 2003-08-14 | 2005-02-17 | Frost Keith A. | Orthoester compositions and methods of use in subterranean applications |
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| CN105733541A (en) * | 2014-12-11 | 2016-07-06 | 中国石油化工股份有限公司 | Corrosion and scale inhibitor composition, application thereof, and oil field water injection wellbore corrosion and scale prevention method |
| CN105863560A (en) * | 2016-05-25 | 2016-08-17 | 辽宁瑞达石油技术有限公司 | Oil-well steam thermal washing and chemical agent composite paraffin removal system and method |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050034868A1 (en) * | 2003-08-14 | 2005-02-17 | Frost Keith A. | Orthoester compositions and methods of use in subterranean applications |
| CN1560175A (en) * | 2004-02-25 | 2005-01-05 | 石油大学(华东) | Clear type high-efficient paraffin removal agent |
| CN101133135A (en) * | 2005-03-04 | 2008-02-27 | 巴斯福股份公司 | Use of water-soluble alkane sulfonic acids for increasing the permeability of underground petroliferous and/or gas-bearing carbonate rock formations and for dissolving carbonate contaminants and/or co |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939341A (en) * | 2017-11-29 | 2018-04-20 | 大庆华营化工有限公司 | A kind of microbial wax control agent and preparation method thereof |
| CN110184041A (en) * | 2019-07-06 | 2019-08-30 | 西南石油大学 | A kind of oil-base paraffin remover that can be recycled |
| CN113006740A (en) * | 2021-04-27 | 2021-06-22 | 天津东拓油田技术服务有限公司 | Wellhead paraffin prevention mechanism and process |
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Application publication date: 20170322 |
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