CN105112039B - A kind of high temperature resistant oil-soluble viscosity reducer and preparation method thereof - Google Patents
A kind of high temperature resistant oil-soluble viscosity reducer and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of high temperature resistant oil-soluble viscosity reducers and preparation method thereof, belong to technical field of petroleum extraction.The thinner is grouped as by the group of following weight percentage：Ethylene vinyl acetate copolymer 2~4%, fatty amine polyoxyethylene polyoxypropylene ether 1~3%, solvent naphtha 93~97%；Preparation method includes：Ethylene vinyl acetate copolymer is added in solvent naphtha, stirs 3~5 hours, makes it completely dissolved at being 45~55 DEG C in temperature；Fatty amine polyoxyethylene polyoxypropylene ether is heated to 45~55 DEG C, continue at 45~55 DEG C stirring after being mixed with above-mentioned substance 3~5 hours to get.The present invention 350 DEG C of thinner high temperature resistant, suitable heavy crude heat extraction is handled up, and not by oil property and it is aqueous influence, viscosity-reducing performance is good；Coordinating with steam rapid heat cycle is handled up, and using that can reduce steam injection pressure on thick oil thermal extraction, expands steam swept volume, improves crude oil fluidity, improves oil well oil-producing and gas oil ratio.
Description
Technical field
Present invention relates particularly to the preparation methods of a kind of high temperature resistant oil-soluble viscosity reducer and the thinner, belong to oil
Production technique field.
Background technology
Currently, the thinner that oil-field thick-oil thermal recovery uses is water-soluble thinner, and when crude oil water containing is higher than 30%, viscosity reduction
Agent just has preferable viscosity reducing effect；But when crude oil water containing is less than 30%, since former Water in oil is less, stabilization will not be formed
O/W type emulsion, increase the viscosity of crude oil instead, water-soluble thinner cannot play a role.Oil-soluble viscosity reduction is applied in research
Technology can overcome existing emulsifying pour depressor defect, aqueous lower on stratum, remain able to be effectively improved crude stream
Dynamic property, improves the percolation ability on stratum.Oil film can be removed simultaneously, improves the swept volume for being subsequently implanted into steam, reduce stratum
Oil saturation.Thoroughly solve the production problem of the vapor absorption capacity difference of viscous crude initial stage exploitation.
Chinese patent (application number：200910113418.2) a kind of oil-soluble viscosity reducer is disclosed, by following parts by weight
Group be grouped as：15~25 parts of 200# solvent naphthas, 15~20 parts of acrylic acid mixed ester, 45~55 parts of macromolecule pour point depression and viscosity reduction agent,
10~15 parts of organic silicon surfactant, which can effectively reduce condensation point and viscosity, and viscous crude structure is made to become to evacuate, however
The thinner viscosity break ratio is not high, is not achieved 70%, and cannot be injected with steam, is not suitable for heavy crude heat extraction.Chinese patent (application
Number：201010126843.8) a kind of oil-soluble viscosity breaker composition is disclosed, on the basis of the gross mass of composition, contains 50
~90% ester, 5~45% asphaltene dispersants, remaining is solvent, and the ester has general formula R 1CH (R2) COOCH3's
One or more in carboxylate, wherein R1 and R2 are branched alkyl, and R1 and R2 can be identical or different, the carbon number of R1 and R2 it
Be 10~50, the features such as which has viscosity break ratio high, safety and stability, however the viscosity reduction composition can not be with steaming
Vapour injects, and can not be applied on thick oil thermal extraction.
Invention content
The object of the present invention is to provide a kind of high temperature resistant oil-soluble viscosity reducers and preparation method thereof.
In order to achieve the goal above, the technical solution adopted in the present invention is：
A kind of high temperature resistant oil-soluble viscosity reducer, is grouped as by the group of following weight percentage：Ethylene-vinyl acetate is total
Polymers 2~4%, fatty amine polyoxyethylene polyoxypropylene ether 1~3%, solvent naphtha 93~97%.
The ethylene-vinyl acetate copolymer (EVA) by ethylene, vinyl acetate copolymerized form.Its effective content
It is 5~10%, is white, elastic film, can be commercial goods.
The fatty amine polyoxyethylene polyoxypropylene ether is clear yellow viscous paste, and pH value is 5~7, not soluble in water, molten
Solution, at clear solution, can dissolve in ethanol-water system in ethyl alcohol, acetone, be dissolved in white mineral oil into clear solution, Ke Yiwei
Commercial goods (manufacturer is Jiangsu Hai'an Petrochemical Plant).
The solvent naphtha appearance is in colourless transparent liquid, is 200# solvents by 140~200 DEG C of fractional composition of petroleum
Oil can be commercial goods.
A kind of preparation method of high temperature resistant oil-soluble viscosity reducer, includes the following steps：By ethylene-vinyl acetate copolymer
It is added in solvent naphtha, stirs 3~5 hours, make it completely dissolved at being 45~55 DEG C in temperature；Fatty amine polyoxypropylene is gathered
Ethylene oxide ether is heated to 45~55 DEG C, continue stirring after being mixed with above-mentioned substance at 45~55 DEG C again 3~5 hours to get.
Beneficial effects of the present invention：
The component of high temperature resistant oil-soluble viscosity reducer of the present invention is simple, acts synergistically between component notable：Ethylene-vinyl acetate
Copolymer individually has viscosity reduction effect with solvent, and up to 60% or so, fatty amine polyoxyethylene polyoxypropylene ether has single dose viscosity break ratio
There is pour-point depressing process；Viscosity break ratio is up to 80% or more after three kinds of composition synthesis, while reducing 2-3 DEG C of solidification point.
The thinner of the present invention has the following advantages：
(1) 350 DEG C of high temperature resistant, suitable heavy crude heat extraction are handled up.Coordinating with steam rapid heat cycle is handled up, and is applied on thick oil thermal extraction, can drop
Low steam injection pressure expands steam swept volume, improves crude oil fluidity.To extend the production time in period, oil well oil-producing is improved
And gas oil ratio.
(2) for the crude oil of different crude oils property (common heavy oil, super―heavy oil etc.), different water cut (0~70%), have
Have preferable Viscosity-reducing.When the 4% of a concentration of pure oil is added, viscosity break ratio reaches 80% or more；Increase to concentration is added
8%, viscosity break ratio reaches 90% or more.Addition is few, economical and practical, cheap.
(3) organochlorine is free of through examining, it is non-hazardous to downstream refinery technique, i.e., to the dehydration of system follow-up crude oil and Water Quality Office
Reason does not have an impact.
The present invention oil-soluble viscosity reducer, can 350 DEG C of heatproof, be suitble to steam inject stratum.In aqueous low water 30%
And all there is preferable viscosity reducing effect to different crude oils property, viscosity break ratio reaches 80% or more.
The method that the present invention prepares oil-soluble viscosity reducer is simple, easy to operate, is stirred and evenly mixed under the conditions of 45~55 DEG C,
Suitable for industrialized production and field application.
Specific implementation mode
Only invention is further described in detail for following embodiments, but does not constitute any limitation of the invention.
Embodiment 1
High temperature resistant oil-soluble viscosity reducer is grouped as by the group of following weight percentage in the present embodiment：Ethyl vinyl acetate second
Enoate copolymer (EVA) 2%, fatty amine polyoxyethylene polyoxypropylene ether 3%, 200# solvent naphthas 95%.Preparation method is：It weighs
20 kilograms of EVA is put into reaction kettle, and 950 kilograms of solvent naphtha is added, is stirred 4 hours under the conditions of temperature 50 C, keeps it complete
It dissolves in portion；30 kilograms of fatty amine polyoxyethylene polyoxypropylene ether is heated to 50 DEG C again, can be flowed, is subsequently poured into anti-
It answers in kettle, continues to stir 4 hours under the conditions of 50 DEG C to get 1000 kilograms of thinner.
Embodiment 2
High temperature resistant oil-soluble viscosity reducer is grouped as by the group of following weight percentage in the present embodiment：Ethyl vinyl acetate second
Enoate copolymer (EVA) 2%, fatty amine polyoxyethylene polyoxypropylene ether 1%, 200# solvent naphthas 97%.Preparation method is：It weighs
20 kilograms of EVA is put into reaction kettle, and 970 kilograms of solvent naphtha is added, is stirred 5 hours under the conditions of temperature 45 C, keeps it complete
It dissolves in portion；10 kilograms of fatty amine polyoxyethylene polyoxypropylene ether is heated to 45 DEG C again, can be flowed, is subsequently poured into anti-
It answers in kettle, continues to stir 5 hours under the conditions of 45 DEG C to get 1000 kilograms of thinner.
Embodiment 3
High temperature resistant oil-soluble viscosity reducer is grouped as by the group of following weight percentage in the present embodiment：Ethyl vinyl acetate second
Enoate copolymer (EVA) 4%, fatty amine polyoxyethylene polyoxypropylene ether 3%, 200# solvent naphthas 93%.Preparation method is：It weighs
40 kilograms of EVA is put into reaction kettle, and 930 kilograms of solvent naphtha is added, and is stirred 3 hours under the conditions of 55 DEG C of temperature, is kept it complete
It dissolves in portion；30 kilograms of fatty amine polyoxyethylene polyoxypropylene ether is heated to 55 DEG C again, can be flowed, is subsequently poured into anti-
It answers in kettle, continues to stir 3 hours under the conditions of 55 DEG C to get 1000 kilograms of thinner.
Fatty amine polyoxyethylene polyoxypropylene ether used in above-described embodiment provides for Jiangsu Hai'an Petrochemical Plant
Commercial goods.
Test example 1
This experimental example chooses the crude oil of different thermal production wells, and 1 gained thinner of embodiment is added, and (addition is crude quality
5%) its viscosity reducing effect, is measured.The results are shown in Table 1.
1 embodiment of table, 1 gained thinner viscosity reducing effect
| Pound sign | GB125 | G4705 | L7-1H | YQ3-P11 | YQ3-P14 |
| Crude oil original viscosity (mpas) | 1199 | 3300 | 27260 | 159693 | 221551 |
| The viscosity after 5% thinner is added | 221 | 417 | 3564 | 21079 | 22545 |
| Viscosity break ratio | 81.6% | 87.4% | 86.9% | 86.8% | 89.8% |
As it can be seen from table 1 after 5% embodiment, the 1 molten thinner of gained oil is added, viscosity of crude reduces rapidly, viscosity break ratio
80% or more.By comparing 5 mouthfuls of well data in table, YQ3-P14 viscosity of crude highests, viscosity of crude reaches
221551mPa.s, and the well viscosity break ratio also highest, are 89.8%；GB125 viscosity of crude is low, only 1199mPa.s, well drop
Viscous rate is 81.6%.The experimental results showed that oil-soluble viscosity reducer of the invention is to special, the viscosity reducing effect of super-viscous oil is more preferable.
Test example 2
This experimental example tries out 1 gained thinner of embodiment on Henan Oil Field Wang943Jing.The well is due to viscosity of crude height
And it is with short production cycle, and polished rod lags in process of production.During steam injection, 10 tons of 1 gained viscosity reductions of embodiment are injected
After agent measure (thinner addition is the 5% of crude quality), the production cycle extends, and 1.5 tons of day oil-producing increase, production effect obtains
To being obviously improved.The following table 2 is that viscosity of crude tracks result of laboratory test.
Viscosity of crude tracking result after thinner is added in 2 Henan Oil Field Wang943Jing of table
| 943 well head of king | 30℃ | 40℃ | 50℃ | 60℃ | 70℃ |
| Viscosity of crude (mpas) before measure | 57745 | 25095 | 13232 | 7950 | 2540 |
| Viscosity (mpas) after dosing in measure cup | 12873 | 4916 | 2345 | 877 | 354 |
| Viscosity of crude (mpas) after measure | 8751 | 4957 | 2798 | 1821 | 987 |
From table 2 it can be seen that the thinner of the present invention is obviously improved the crude oil fluidity of thick oil thermal extraction, have significant
Viscosity reducing effect.
Claims (3)
1. a kind of high temperature resistant oil-soluble viscosity reducer, it is characterised in that：It is grouped as by the group of following weight percentage：Ethylene-vinegar
Vinyl acetate copolymer 2~4%, fatty amine polyoxyethylene polyoxypropylene ether 1~3%, solvent naphtha 93~97%；The solvent naphtha
It is 200# solvent naphthas by 140~200 DEG C of fractional composition of petroleum.
2. high temperature resistant oil-soluble viscosity reducer according to claim 1, it is characterised in that：The ethylene-vinyl acetate
Copolymer by ethylene, vinyl acetate copolymerized form.
3. a kind of preparation method of high temperature resistant oil-soluble viscosity reducer as described in claim 1, it is characterised in that：Including following step
Suddenly：Ethylene-vinyl acetate copolymer is added in solvent naphtha, is stirred 3~5 hours at being 45~55 DEG C in temperature, makes it
It is completely dissolved；Fatty amine polyoxyethylene polyoxypropylene ether is heated to 45~55 DEG C, again 45~55 after being mixed with above-mentioned substance
Continue stirring at DEG C 3~5 hours to get.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105950127B (en) * | 2016-05-16 | 2018-12-14 | 中国石油化工股份有限公司 | Viscous crude pour-viscosity reduction composition, viscous crude pour point depression and viscosity reduction agent and preparation method thereof |
| CN106047329B (en) * | 2016-06-06 | 2020-03-06 | 中国石油化工股份有限公司 | High-temperature-resistant pour point depressant and preparation method thereof |
| CN107663448B (en) * | 2016-07-27 | 2020-04-10 | 中国石油天然气股份有限公司 | Oil-soluble viscosity reducer for heavy oil conveying and preparation method thereof |
| CN109295739A (en) * | 2018-09-19 | 2019-02-01 | 蓝天佑 | A kind of environment-friendly type polyglycol ether processing thinner and preparation method thereof |
| CN112457837B (en) * | 2020-11-24 | 2023-01-24 | 中国石油大学(华东) | Solid asphaltene inhibitor and preparation method and application thereof |
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