CN110105942A - A kind of paraffin remover and its preparation method and application - Google Patents
A kind of paraffin remover and its preparation method and application Download PDFInfo
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- CN110105942A CN110105942A CN201810101020.6A CN201810101020A CN110105942A CN 110105942 A CN110105942 A CN 110105942A CN 201810101020 A CN201810101020 A CN 201810101020A CN 110105942 A CN110105942 A CN 110105942A
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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 provides a kind of paraffin remover and its preparation method and application, paraffin remover includes following component according to weight percentage: ethylene-vinyl acetate copolymer 0.1-3%, dichloroethanes 1-2%, polyacrylate 0.5-0.8%, styrene 1-2%, dispersing agent 0.1-0.5%, bleeding agent 0.1-0.3%, pour-point depressant 0.1-1% and surplus C9 aromatic.The present invention is used to solve in the prior art to be difficult to clean off ultra deep gas condensate well the technological deficiency of blocking.
Description
Technical field
The invention belongs to oilfield exploitation technical field, in particular to a kind of paraffin remover and its preparation method and application.
Background technique
It is generated in mid-late oilfield development, after subsurface temperature, pressure are more than critical condition, liquid hydrocarbon retrograde evaporation
Gas, referred to as condensate gas.Condensate gas has phase, flow characteristics complicated, and especially continental reservoir is low with the low hole of reservoir
It seeps, heterogeneity is strong, and stratum is easy to happen retrograde condensation phenomenon, and features, the exploitation difficulty such as easy liquid lock are big.
In the process of development, as strata pressure constantly reduces, phase-state change can occur for the heavy hydrocarbon in condensate gas, on stratum
Middle precipitation condensate forms gas-liquid two-phase.After extraction, due to surface pressure, temperature reduce and it is inverse be condensed into light oil, i.e.,
Condensate.Condensate gas is that petroleum is dissolved in the mixture formed in natural gas under high-temperature and high-pressure conditions.Condensate gas is located underground
In the rock of thousands of meters of depths, the major product developed is condensation oil and gas.
Therefore, for condensate gas well, since temperature, pressure reduces, the heavy components such as paraffin can be from or condensate
Middle precipitation, to cause the blocking of oil transportation tubing string, serious will have a direct impact on produces on oil field.
At this stage, for the wax removal of condensate gas well, there is no preferable methods, for ultra deep gas condensate well
Even more it is difficult to clean off blocking.
Summary of the invention
In view of the foregoing drawbacks, the present invention provides a kind of paraffin remover and its preparation method and application, for solving the prior art
In the technological deficiency of blocking is difficult to clean off for ultra deep gas condensate well.
The present invention provides a kind of paraffin remover, includes following component: ethylene-vinyl acetate copolymer according to weight percentage
0.1-3%, dichloroethanes 1-2%, polyacrylate 0.5-0.8%, styrene 1-2%, dispersing agent 0.1-0.5%, bleeding agent
0.1-0.3%, pour-point depressant 0.1-1% and surplus C9 aromatic.
Paraffin remover composition provided by the invention is simple, does not generate layering and precipitating, in stable condition.The paraffin remover is to condensation
When the oil pipe paraffin blockage of gas well carries out wax removal, can rapid osmotic enter in wax, promote the wax in condensate gas well production pipe
Removing, dispersion, are conducive to improve the solution rate and solvability to wax, effectively dissolve the life in condensate gas well production pipe
At wax, to get through the production pipe in condensate gas well.
The above-mentioned each component of paraffin remover of the present invention be it is common commercially available, wherein carbon nine refers to that the aromatic hydrocarbons of nine carbon atoms evaporates
Point, main component has isopropylbenzene, n-proplbenzene, ethyltoluene.
It further, include following component according to weight percentage: ethylene-vinyl acetate copolymer 0.1-3%, second
Alkene-acetate ethylene copolymer 1.55%, dichloroethanes 1.5%, polyacrylate 0.65%, styrene 1.5%, dispersing agent
0.3%, bleeding agent 0.2%, pour-point depressant 0.55% and C9 aromatic 93.75%.
Further, the pour-point depressant is prepared via a method which to obtain: after Long Chain Alkyl Acrylate is dissolved in toluene,
Initiator is added, after being heated to reflux 3h, obtains the pour-point depressant；The quality of the initiator is the Long Chain Alkyl Acrylate matter
The 0.1% of amount；
The initiator is the mixture of benzoyl peroxide, hydrogen peroxide and sodium formaldehyde sulfoxylate, wherein the benzoyl peroxide first
The mass ratio of acyl, hydrogen peroxide and sodium formaldehyde sulfoxylate is 1:1:1.
Further, the dispersing agent is selected from Sodium Polyacrylate.
Sodium Polyacrylate is-kind with hydrophilic and hydrophobic grouping water-soluble high-molecular compound, it is slowly dissolved in water and is formed
Very viscous transparency liquid, sticky and unwetted swelling (such as CMC, sodium alginate) generate, but due to many yin of intramolecular from
The ionic phenomenon of subbase group makes molecule chain growth, and apparent viscosity increases and forms high-viscous solution.Its viscosity is about CMC, seaweed
15-20 times of sour sodium.Heat treatment, neutral salt, organic acid are to its viscous effects very little, and then viscosity increases when alkaline.
As relative molecular mass increases, Sodium Polyacrylate is from colourless weak solution to transparent elastic colloid or even solid.Property
Matter, purposes are also different with relative molecular mass and have significant difference.Relative molecular mass can be used as dispersion in 1000-10000
Agent is applied to the industrial circles such as water process (dispersing agent or antisludging agent), papermaking, textile printing and dyeing, ceramics.Disperse as papermaking coating
When agent, for relative molecular mass in 2000-4000, coating concentration can still have good rheological and curing steady at 65%~70%
It is qualitative.Molecular weight is between 1000-3000, scaling control agent when being used as water quality stabilizer and Black Liquor Concentration.Molecular weight is 10
Above, it is used as coating thickener and water-retaining agent, the synthetic latexes viscosity such as carboxylated styrene-butadiene latex, acrylic acid ester emulsion can be made to increase
It is long, dehydration is avoided, coating system is kept to stablize.Molecular weight is used as flocculant, and in the food industry 10 or more
Make tackifier, emulsifying dispersant etc..
Further, the bleeding agent is selected from fatty alcohol polyoxyethylene ether.
Fatty alcohol polyoxyethylene ether also known as alcohol ether, alcohol ethoxylate, as developing most in nonionic surface active agent
The fast and maximum kind of dosage, has the advantage that
1, with excellent biological degradability and cryogenic property；
2, it is not influenced by the water hardness；
3, cheap.
In general, fatty alcohol polyoxyethylene ether is the presence in basic catalysts such as sodium methoxide, sodium ethoxide and sodium hydroxides
Under, it is reacted through oxyethylation by ethylene oxide and is made.
Fat alcohol polyoxyethylene ether series of surfactants due to fatty alcohol carbon atom number and ethoxymer distribution not
With there are many kinds.Lower alcohol C7~9Have with the product (product name is penetrating agent JFC) of the EO addition of 5mol~6mol good
Wet and permeance property, applied in the various process of fiber.When the carbon atom number of fatty alcohol is C12~14When, usually
As AEO；AEO2~3It is not soluble in water, it is typically used as the anionic surfactants such as synthesizing efficient detergent AES, AEC and AESS
Raw material, and there are the performances such as emulsification, level dyeing and infiltration, it can be used as the levelling agent of textile industry, the group of wetting agent and various finishes
Point；AEO4~9For oil soluble emulsifying agent, it is mainly used for Wool detergent, woolen industry degreasing agent, Fabric detergent and liquid and washes
The active component of agent is washed, general industry makees emulsifier；AEO7、AEO9And AEO10With the property such as good wet, emulsification and decontamination
Can, the active matter as detergent, detergent and wetting agent of textile industry etc.；AEO15And AEO20With good emulsification, divide
It dissipates and the performances such as decontamination, is used as the levelling agent of textile industry, the cleaning agent and cosmetics of intermetallic composite coating, pesticide and ink etc.
Emulsifier.When the carbon atom number of fatty alcohol is C14~18When, commonly referred to as peregal.Wherein C14~16Referred to as paregal O S；C16~17
Referred to as paregal O, C18Referred to as peregal A etc..The series has the performances such as good emulsification and dispersion.The ethoxylate of secondary alcohol
Biological degradability is good, viscosity is low, solubility is big, gelling narrow range and hard water resistance property are good, has good wetting power and detergency；
Brokenly bubble is good and is easy to rinse；It is low to the irritation of skin, it is easy to mix with other substances.It can be special in articles for washing, chemistry
It is used as detergent, emulsifier, wetting agent, dispersing agent and plasticizer in the fields such as product, plastics, leather and weaving.
The present invention also provides a kind of preparation methods of any of the above-described paraffin remover, include the following steps:
By the ethylene-vinyl acetate copolymer, dichloroethanes, polyacrylate, styrene, dispersing agent, bleeding agent, drop
After solidifying agent and carbon nine mix, it is heated to 50-80 DEG C, 2-5h is stirred, the paraffin remover is made.
Preferably, heating temperature is 60 DEG C, mixing time 2h.
Wherein, each component is uniformly mixed using conventional method and be can be prepared by by above-mentioned preparation method, and the present invention is to above-mentioned each
The order of addition of kind reactant is without limiting.For example, can be according to ethylene-vinyl acetate copolymer, dichloroethanes, polypropylene
Acid esters, styrene, dispersing agent, bleeding agent, pour-point depressant and carbon nine sequence be added, can also according to carbon nine, pour-point depressant,
Bleeding agent, dispersing agent, styrene, polyacrylate, dichloroethanes and ethylene-vinyl acetate copolymer sequence added
Add.
Further, the revolving speed of the stirring is 200~300 revs/min.
Preparation method provided by the present invention, ethylene-vinyl acetate copolymer, dichloroethanes, polyacrylate, benzene second
Alkene, dispersing agent, bleeding agent, pour-point depressant and carbon nine addition sequence can be it is any, each addition sequence is to paraffin remover obtained
Effect does not have significant adverse influence.When preparation method of the invention is by using suitable heating temperature, mixing speed and stirring
Between, it not only contributes to form stable paraffin remover system, the mobility of enhancing paraffin remover is additionally helped, thus using more
It is convenient, particularly suitable for carrying out wax removal to condensate gas well.
The present invention also provides a kind of any of the above-described paraffin removers to the application in condensate gas well wax removal.
The present invention also provides the methods that a kind of pair of condensate gas well carries out wax removal, and any of the above-described paraffin remover is injected institute
It states to impregnate in the production pipe in condensate gas well and carries out wax removal.
Specifically, it is condensate gas well well that the above-mentioned paraffin remover being stored in medicine-chest, which is forced into outlet pressure, by draw-off pump
The safe pressure of mouth, so that paraffin remover be injected in production pipe.Since the pressure in condensate gas well shaft bottom is very high, 10MPa or more is reached,
Therefore the paraffin remover of injection cannot be introduced into shaft bottom, can only be standing and soaking in the production pipe blocked, after the immersion of 5-12h,
Wax in production pipe can gradually be dissolved by paraffin remover, can find that the pressure of well head rises at this time.
Rise along with the pressure of well head, the paraffin remover in production pipe can be returned in discharge production pipe, can be passed through at this time
Recovery pipe recycles the paraffin remover for being returned discharge, by increasing injection pressure, is again injected into the paraffin remover of recycling
In the production pipe of condensate gas well, repeatedly, until the paraffin remover of injection can judge the wax in production pipe by the quick row of returning
Matter is removed substantially, is blocked and is released, to complete the de-plugging work of the condensate gas well production pipe.
After the completion of above-mentioned de-plugging work, the judgement of wax removal ability can also be carried out to the paraffin remover after using, so that it is determined that
Whether can continue to work for the wax removal de-plugging of next condensate gas well production pipe.
Specifically, can be measured by the density to paraffin remover, to be judged according to the variable density of paraffin remover clear
Molten wax amount in cerate can continue to use the paraffin remover to next condensation when the molten wax amount in paraffin remover is less than 15%
Gas well production pipe implements wax removal de-plugging work, when the molten wax amount in paraffin remover is greater than 15%, due to the major part in paraffin remover
For C9 aromatic, therefore directly the paraffin remover can be injected in outer output oil pipeline, without appoint to paraffin remover and locate afterwards
Science and engineering is made.
When the present invention states production pipe progress wax removal of the paraffin remover to condensate gas well in use, it can be blocked according to production pipe
Specific length determine the specific dosage of paraffin remover, there is no particular restriction.
Implementation of the invention, at least has the advantage that
1, the molten wax speed of paraffin remover of the invention is fast, can effectively dissolve the precipitation wax in condensate gas well, reach fine
Wax removal effect；
2, paraffin remover ingredient of the invention is simple, stable system, easy to use, will not generate after wax removal any toxic
Harmful substance, and it can be recycled and be not necessarily to any post-processing, it can be used as supply injection petroleum pipeline after failure
In, it is operated without any recovery processing；
3, the preparation method of paraffin remover of the invention is easy to operate, easily controllable, not only contributes to be formed stable clear
Cerate system, in addition there are the mobility for being conducive to help enhance paraffin remover；
4, the wax removal effect of paraffin remover of the invention in the wax removal de-plugging for condensate gas well production pipe is good, needed for wax removal
Equipment is simple, not will cause secondary pollution；
5, paraffin remover of the invention does not contain corrosive elements, therefore avoids and cause to damage to oil extraction pipeline and equipment；
6, the paraffin remover of the invention solvent low without lightning, small toxicity, safety can in use, storage and transport
It leans on.
Therefore, in terms of desired effect and safety, the present invention can be that the clear of wax is precipitated in condensate gas well production pipe
Except the technical support that offer is strong.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is facility installation drawing when carrying out condensate gas well wax removal using paraffin remover of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the embodiment of the present invention, to this
Technical solution in inventive embodiments is clearly and completely described, it is clear that described embodiment is that a part of the invention is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creation
Property labour under the premise of every other embodiment obtained, shall fall within the protection scope of the present invention.
During oil exploitation, oil gas usually first flows into shaft bottom from reservoir, then rises to well head from shaft bottom, then from well
Mouth flows into oil gathering station, and after separating and dehydrating is handled, oil gas flows into oil transportation gas master station and simultaneously transfers out mining area.
Oil exploitation can substantially be divided into three phases:
Primary oil recovery usually relies on the natural energies such as rock expansion, edge water drive, gravity, natural gas expansion and is exploited,
The stage is mainly lifted to the petroleum in oil reservoir voluntarily outside well by oil pipe using natural energy；However, with crude oil and day
The continuous output of right gas, the volume of fluid gradually extends in reservoir rock and stratum, and elastic energy gradually discharges, the stage petroleum
Recovery ratio averagely be only 15-20%.
Secondary oil recovery is mainly that the pressure of oil reservoir is improved by modes such as water filling, gas injections, thus the energy after oil well stop-spraying
Oil well is enough set to continue oil-producing.Wherein, water flooding recovery is to inject water into oil reservoir by special injection well to keep or restore oil reservoir
Pressure, to make the stronger driving force of reservoir formation to improve the exploitation rate and recovery ratio of oil reservoir；Gas injecting mining is mainly benefit
With interfacial tension being reduced, improve permeability the effects of the injection viscosity reduction of gas, expansion, mixed phase, molecule diffusion, and then improve oil
Field tar productivity.Due to the heterogeneity on stratum, fluid is injected generally along the lesser approach of resistance and flows to oil well, and be in resistance
Petroleum in relatively large region and it is some still can not be extracted by the adsorbed petroleum of rock, therefore secondary adopt
The recovery ratio in oily stage is still limited.
Tertiary oil recovery mainly changes the viscosity of crude oil and the absorption to rock by using various physics, chemical method
Property, to increase the fluid ability of crude oil, further increase oil recovery factor.Tertiary oil recovery method mainly includes oil recovery by heating
Method, chemical flooding oil process, miscible displacement of reservoir method, microbial oil displacement method etc..Wherein, thermal recovery processes mainly utilize reduction viscosity of crude
Mode improves recovery ratio, and wherein steam soak is a kind of common oil recovery by heating method, a certain amount of by injecting to oil well
Steam and make the thermal energy of steam to oil reservoir spread, thus greatly reduce viscosity of crude, improve the fluid ability of crude oil；Change
Displacement of reservoir oil method is learned mainly to increase the viscosity of water flooding by injection chemical agent, the viscosity ratio for changing crude oil and water flooding, reduce ground
Gap in layer between the fluid ability of water and the fluid ability of oil, while crude oil is reduced to the adsorptivity of rock to improve the displacement of reservoir oil
Efficiency；Miscible displacement of reservoir method mainly passes through the gases such as injection natural gas, carbon dioxide and mixed phase occurs for crude oil, so that it is viscous to reduce crude oil
Degree and to the adsorptivity of rock；Microbial oil displacement method is made using microorganism and its metabolite cracking heavy hydrocarbon class and paraffin
The macromolecular of petroleum becomes small molecule, while being metabolized the gas for generating and dissolving in crude oil, to reduce viscosity of crude and increase original
The mobility of oil, and then achieve the purpose that improve oil recovery factor.
But in mid-late oilfield development, after subsurface temperature, pressure are more than critical condition, liquid hydrocarbon retrograde evaporation and
The gas of generation, referred to as condensate gas.In the rock of condensate gas thousands of meters of depths located underground, the major product developed is condensation
Oil and gas.
For condensate gas well, since temperature, pressure reduces, the heavy components such as paraffin can be analysed from or in condensate
Out, to cause the blocking of oil transportation tubing string, serious will have a direct impact on produces on oil field.
At this stage, for the wax removal of condensate gas well, there is no preferable methods, for ultra deep gas condensate well
Even more it is difficult to clean off blocking.
In order to overcome the above-mentioned defects in the prior art, the purpose of the present invention is to provide a kind of paraffin remover and its preparation sides
Method and application, the technological deficiency for solving in the prior art to be difficult to clean off ultra deep gas condensate well blocking.
The contents of the present invention are described below in conjunction with attached drawing is detailed, so that those skilled in the art can be more
The detailed understanding contents of the present invention.
The manufacturer of chemical substance used in following embodiment and model are as follows:
Ethylene-vinyl acetate copolymer: Suzhou summer long-drawn-out plasticizing Co., Ltd
Dichloroethanes: the prosperous Ying Da Chemical Co., Ltd. in Jinan
Polyacrylate: Nanjing Jia Zhong Chemical Industry Science Co., Ltd
Styrene: the prosperous Ying Da Chemical Co., Ltd. in Jinan
Dispersing agent (Sodium Polyacrylate): Suzhou Zhuo Xin Biotechnology Co., Ltd
Bleeding agent (fatty alcohol polyoxyethylene ether): Jiangsu Hai'an Petrochemical Plant
C9 aromatic: Lanzhou Yu Lian fossil fuel Co., Ltd
Pour-point depressant in following embodiment is prepared as follows:
It after Long Chain Alkyl Acrylate is dissolved in toluene, starts to warm up, initiator is added during heating, flow back 3h
Afterwards, rotary evaporation processing is carried out to reaction system and removes solvent, obtain pour-point depressant；Wherein, the quality of initiator is that acrylic acid is high
The 0.1% of carbon alcohol ester quality；
Initiator is the mixture of benzoyl peroxide, hydrogen peroxide and sodium formaldehyde sulfoxylate, wherein benzoyl peroxide, dioxygen
The mass ratio of water and sodium formaldehyde sulfoxylate is 1:1:1.
In addition, Long Chain Alkyl Acrylate is prepared as follows:
In 500mL three-necked flask be added higher alcohols 100g, heating be allowed to melt completely, add 120g acrylic acid and
Mass fraction is 0.6% polymerization inhibitor (cornstarch, soluble starch) and 1% polyvinyl alcohol, is heated to 110 DEG C, reaction
6h.It is cooling after reaction terminates, ethyl acetate is added, is washed with saturated sodium carbonate solution to alkalescent, then use saturated sodium-chloride
Solution is washed till neutrality, separates organic layer, and anhydrous calcium chloride is added and dries, filters, boils off solvent, obtains Long Chain Alkyl Acrylate.
Embodiment 1
The paraffin remover of the present embodiment includes following component according to weight percentage:
Ethylene-vinyl acetate copolymer: 1.55%
Dichloroethanes: 1.5%
Polyacrylate: 0.65%
Styrene: 1.5%
Dispersing agent: 0.3%
Bleeding agent: 0.2%
Pour-point depressant: 0.55%
C9 aromatic: 93.75%.
The paraffin remover can be prepared as follows:
After according to above-mentioned composition ingredient, in a kettle by the ethylene-vinyl acetate copolymer, dichloroethanes, poly-
Acrylate, styrene, dispersing agent, bleeding agent, pour-point depressant and carbon nine mix, and 60 DEG C are heated to, in the stirring of 250r/min
2h is stirred under speed, is cooled to room temperature, the paraffin remover of the present embodiment is made.
Embodiment 2
The paraffin remover of the present embodiment includes following component according to weight percentage:
Ethylene-vinyl acetate copolymer: 1.5%
Dichloroethanes: 1.5%
Polyacrylate: 0.6%
Styrene: 1%
Dispersing agent: 0.2%
Bleeding agent: 0.2%:
Pour-point depressant: 0.15%
C9 aromatic: 94.85%
The paraffin remover can be prepared as follows:
After according to above-mentioned composition ingredient, in a kettle by the ethylene-vinyl acetate copolymer, dichloroethanes, poly-
Acrylate, styrene, dispersing agent, bleeding agent, pour-point depressant and carbon nine mix, and 50 DEG C are heated to, in the stirring of 270r/min
3h is stirred under speed, is cooled to room temperature, the paraffin remover of the present embodiment is made.
Embodiment 3
The paraffin remover of the present embodiment includes following component according to weight percentage:
Ethylene-vinyl acetate copolymer: 2%
Dichloroethanes: 1.6%
Polyacrylate: 0.7%
Styrene: 1.5%
Dispersing agent: 0.3%
Bleeding agent: 0.25%
Pour-point depressant: 0.17%
C9 aromatic: 93.47%
The paraffin remover can be prepared as follows:
After according to above-mentioned composition ingredient, in a kettle by the ethylene-vinyl acetate copolymer, dichloroethanes, poly-
Acrylate, styrene, dispersing agent, bleeding agent, pour-point depressant and carbon nine mix, and 74 DEG C are heated to, in the stirring of 230r/min
4h is stirred under speed, is cooled to room temperature, the paraffin remover of the present embodiment is made.
Embodiment 4
The paraffin remover of the present embodiment includes following component according to weight percentage:
Ethylene-vinyl acetate copolymer: 2.5%,
Dichloroethanes: 1.7%,
Polyacrylate: 0.75%,
Styrene: 1.7%,
Dispersing agent: 0.4%,
Bleeding agent: 0.27%,
Pour-point depressant: 0.18%
C9 aromatic: 92.5%
The paraffin remover can be prepared as follows:
After according to above-mentioned composition ingredient, in a kettle by the ethylene-vinyl acetate copolymer, dichloroethanes, poly-
Acrylate, styrene, dispersing agent, bleeding agent, pour-point depressant and carbon nine mix, and 65 DEG C are heated to, in the stirring of 250r/min
5h is stirred under speed, is cooled to room temperature, the paraffin remover of the present embodiment is made.
Embodiment 5
The paraffin remover of the present embodiment includes following component according to weight percentage:
Ethylene-vinyl acetate copolymer: 2.7%
Dichloroethanes: 1.8%
Polyacrylate: 0.78%
Styrene: 1.8%
Dispersing agent: 0.45%
Bleeding agent: 0.28%
Pour-point depressant: 0.19%
C9 aromatic: 92%
The paraffin remover can be prepared as follows:
After according to above-mentioned composition ingredient, in a kettle by the ethylene-vinyl acetate copolymer, dichloroethanes, poly-
Acrylate, styrene, dispersing agent, bleeding agent, pour-point depressant and carbon nine mix, and 60 DEG C are heated to, in the stirring of 280r/min
2h is stirred under speed, is cooled to room temperature, the paraffin remover of the present embodiment is made.
Embodiment 6
The paraffin remover of the present embodiment includes following component according to weight percentage:
Ethylene-vinyl acetate copolymer: 3%
Dichloroethanes: 2%
Polyacrylate: 0.8%
Styrene: 2%
Dispersing agent: 0.5%
Bleeding agent: 0.3%
Pour-point depressant: 1%
C9 aromatic: 90.4%
The paraffin remover can be prepared as follows:
After according to above-mentioned composition ingredient, in a kettle by the ethylene-vinyl acetate copolymer, dichloroethanes, poly-
Acrylate, styrene, dispersing agent, bleeding agent, pour-point depressant and carbon nine mix, and 80 DEG C are heated to, in the stirring of 300r/min
1.5h is stirred under speed, is cooled to room temperature, the paraffin remover of the present embodiment is made.
Test example 1
The paraffin remover of the paraffin remover agent and above-mentioned reference examples that are prepared using above-described embodiment 1~2 is respectively to Tarim Oilfield
The ultra deep gas condensate well in company gas field carries out wax removal test.
Fig. 1 is facility installation drawing when carrying out condensate gas well wax removal using paraffin remover of the present invention, before wax removal test, according to figure
Shown in 1, corresponding paraffin removal unit is installed, and paraffin remover is put into medicine-chest for use.
After the installation is completed, it is first turned on the control valve A of medicine-chest, the pressure for adjusting draw-off pump extracts paraffin remover, then beats
Valve opening door 1, valve 2 and valve 3, and the pressure of pressure gauge 1, pressure gauge 2 is monitored, make the injection pressure of paraffin remover not higher than well
The safe pressure of mouth, drug-feeding tube of the paraffin remover through being mounted in condensate gas well production pipe are injected into production pipe and carry out at wax removal
Reason, after injecting paraffin remover, monitoring well head pressure parameter and the paraffin remover density parameter for returning discharge, as shown in table 1.
Wherein, when well head pressure is up to safe pressure shortly, it is necessary to the paraffin remover in production pipe is returned and is ejected,
That is, judging whether the wax removal work of the paraffin remover in current well terminates by well head pressure.In general, needing in condensate gas well
Wax removal work could be completed by injecting multiple paraffin remover, and the parameter in table 1 is the parameter of wax removal work.
Before wax removal work is carried out, the current different content of wax can be measured by the way that the wax of different quality is added into condensate
The density of the condensate of amount can make a standard curve according to multiple groups density-wax amount parameter, thus in wax removal work
The quality of dissolving wax in condensate can also be obtained, the quality is as clear by the density for returning condensate drain condensate oil in conjunction with standard curve
The quality for the wax that cerate dissolves in oil pipe.
In above-mentioned wax removal after treatment, valve 2 and valve 3 are closed, and opens the control valve B of recyclable device, is made
Paraffin remover in condensate gas well, which returns, to be drained into recyclable device, can return the close of the paraffin remover drained into recyclable device by detection
Degree, judges whether paraffin remover can continue to continue to use as the paraffin remover of condensate gas well, if cannot be used continuously, Ke Yizhi
Run in into petroleum pipeline without any processing.
Also, long-term wax removal experiments have shown that, when carrying out wax removal processing using paraffin remover prepared by the embodiment of the present invention 1~2,
It is small to the extent of corrosion of oil extraction pipeline (steel) and follow-up equipment (steel), relative to conventional paraffin remover, oil extraction pipeline with
The service life of follow-up equipment is obviously prolonged.
Test example 2
The paraffin remover agent ultra-deep condensation to Tarim Oilfield company gas field respectively prepared using above-described embodiment 3~4
Gas well carries out wax removal test.
Fig. 1 is facility installation drawing when carrying out condensate gas well wax removal using paraffin remover of the present invention, before wax removal test, according to figure
Shown in 1, corresponding paraffin removal unit is installed, and paraffin remover is put into medicine-chest for use.
After the installation is completed, it is first turned on the control valve A of medicine-chest, the pressure for adjusting draw-off pump extracts paraffin remover, then beats
Valve opening door 1, valve 2 and valve 3, and the pressure of pressure gauge 1, pressure gauge 2 is monitored, make the injection pressure of paraffin remover not higher than well
The safe pressure of mouth, drug-feeding tube of the paraffin remover through being mounted in condensate gas well production pipe is injected into carry out at wax removal using in pipe
Reason, after injecting paraffin remover, monitoring well head pressure parameter and the paraffin remover density parameter for returning discharge, as shown in table 1.
Wherein, when well head pressure is up to safe pressure shortly, it is necessary to the paraffin remover in production pipe is returned and is ejected,
That is, judging whether the wax removal work of the paraffin remover in current well terminates by well head pressure.In general, needing in condensate gas well
Wax removal work could be completed by injecting multiple paraffin remover, and the parameter in table 1 is the parameter of wax removal work.
Before wax removal work is carried out, the current different content of wax can be measured by the way that the wax of different quality is added into condensate
The density of the condensate of amount can make a standard curve according to multiple groups density-wax amount parameter, thus in wax removal work
The quality of dissolving wax in condensate can also be obtained, the quality is as clear by the density for returning condensate drain condensate oil in conjunction with standard curve
The quality for the wax that cerate dissolves in oil pipe.
In above-mentioned wax removal after treatment, valve 2 and valve 3 are closed, and opens the control valve B of recyclable device, is made
Paraffin remover in condensate gas well, which returns, to be drained into recyclable device, can return the close of the paraffin remover drained into recyclable device by detection
Degree, judges whether paraffin remover can continue to continue to use as the paraffin remover of condensate gas well, if cannot be used continuously, Ke Yizhi
Run in into petroleum pipeline without any processing.
Also, long-term wax removal experiments have shown that, when carrying out wax removal processing using paraffin remover prepared by the embodiment of the present invention 3~4,
Small to the extent of corrosion of oil extraction pipeline (steel) and follow-up equipment (steel), the service life of oil extraction pipeline and follow-up equipment is bright
It is aobvious to extend.
Test example 3
The paraffin remover agent ultra-deep condensation to Tarim Oilfield company gas field respectively prepared using above-described embodiment 5~6
Gas well carries out wax removal test.
Fig. 1 is facility installation drawing when carrying out condensate gas well wax removal using paraffin remover of the present invention, before wax removal test, according to figure
Shown in 1, corresponding paraffin removal unit is installed, and paraffin remover is put into medicine-chest for use.
After the installation is completed, it is first turned on the control valve A of medicine-chest, the pressure for adjusting draw-off pump extracts paraffin remover, then beats
Valve opening door 1, valve 2 and valve 3, and the pressure of pressure gauge 1, pressure gauge 2 is monitored, make the injection pressure of paraffin remover not higher than well
The safe pressure of mouth, drug-feeding tube of the paraffin remover through being mounted in condensate gas well production pipe is injected into carry out at wax removal using in pipe
Reason, after injecting paraffin remover, monitoring well head pressure parameter and the paraffin remover density parameter for returning discharge, as shown in table 1.
Wherein, when well head pressure is up to safe pressure shortly, it is necessary to the paraffin remover in production pipe is returned and is ejected,
That is, judging whether the wax removal work of the paraffin remover in current well terminates by well head pressure.In general, needing in condensate gas well
Wax removal work could be completed by injecting multiple paraffin remover, and the parameter in table 1 is the parameter of wax removal work.
Before wax removal work is carried out, the current different content of wax can be measured by the way that the wax of different quality is added into condensate
The density of the condensate of amount can make a standard curve according to multiple groups density-wax amount parameter, thus in wax removal work
The quality of dissolving wax in condensate can also be obtained, the quality is as clear by the density for returning condensate drain condensate oil in conjunction with standard curve
The quality for the wax that cerate dissolves in oil pipe.
In above-mentioned wax removal after treatment, valve 2 and valve 3 are closed, and opens the control valve B of recyclable device, is made
Paraffin remover in condensate gas well, which returns, to be drained into recyclable device, can return the close of the paraffin remover drained into recyclable device by detection
Degree, judges whether paraffin remover can continue to continue to use as the paraffin remover of condensate gas well, if cannot be used continuously, Ke Yizhi
Run in into petroleum pipeline without any processing.
Also, long-term wax removal experiments have shown that, when carrying out wax removal processing using paraffin remover prepared by the embodiment of the present invention 5~6,
Small to the extent of corrosion of oil extraction pipeline (steel) and follow-up equipment (steel), the service life of oil extraction pipeline and follow-up equipment is bright
It is aobvious to extend.
In above-mentioned test example 1-3, the density for not carrying out the condensate before wax removal using paraffin remover is 948.8kg/m3。
The correlation test parameter of paraffin remover in 1 embodiment 1-6 of table
As seen from the results in Table 1: the wax removal excellent effect of each paraffin remover prepared by the present invention can effectively reduce condensate
Density, i.e., dissolution process carried out to the wax in condensate, thus paraffin remover of the invention for temperature such as condensate gas wells and
Wax precipitation under the conditions of pressure is extremely low can obtain good wax removal effect.
Test example 4
The speed of paraffin dissolution of the paraffin remover of paraffin remover and reference examples to above-described embodiment 1-6 preparation is tested.
The test method of molten wax rate is as follows:
It by standard paraffin or after taking deposition is waxy to dissolve, pours into wax ball mold, wax ball mold is integrated cash pledge,
After wax is completely cooling, wax ball mold is gently rotated, going paraffin removal ball to weigh quality is m, is accurate to 0.001g.
The paraffin remover of certain volume is measured in tool plug graduated cylinder, is placed in thermostat water bath and preheats 15min, by water bath with thermostatic control
Temperature is controlled at 44-46 DEG C, keeps paraffin remover temperature consistent with bath temperature, the wax ball that quality is m is immersed in paraffin remover, completely
The time of dissolution is t.
The formula for calculating the speed of paraffin dissolution is as follows:
Wherein,
V is rate of dissolution, unit g/min；
M is wax ball quality, unit g；
T is that wax ball is dissolved time used, unit min.
The test of the speed of paraffin dissolution is carried out to the paraffin remover in embodiment 1-6 respectively:
1, the paraffin remover in 15ml embodiment 1 is measured in tool plug graduated cylinder, is placed in thermostat water bath and is preheated 15min, it will
Water bath with thermostatic control temperature is controlled at 44-46 DEG C, keeps paraffin remover temperature consistent with bath temperature.The standard paraffin wax ball for being 1g by quality
It immerses in paraffin remover, being completely dissolved the time is 10min, and rate of dissolution reaches 0.1g/min.
2, the paraffin remover in 15ml embodiment 2 is measured in tool plug graduated cylinder, is placed in thermostat water bath and is preheated 15min, it will
Water bath with thermostatic control temperature is controlled at 44-46 DEG C, keeps paraffin remover temperature consistent with bath temperature.The standard paraffin wax ball for being 1g by quality
It immerses in paraffin remover, being completely dissolved the time is 15min, and rate of dissolution reaches 0.67g/min.
3, the paraffin remover in 15ml embodiment 3 is measured in tool plug graduated cylinder, is placed in thermostat water bath and is preheated 15min, it will
Water bath with thermostatic control temperature is controlled at 44-46 DEG C, keeps paraffin remover temperature consistent with bath temperature.The standard paraffin wax ball for being 1g by quality
It immerses in paraffin remover, being completely dissolved the time is 20min, and rate of dissolution reaches 0.05g/min.
4, the paraffin remover in 15ml embodiment 4 is measured in tool plug graduated cylinder, is placed in thermostat water bath and is preheated 15min, it will
Water bath with thermostatic control temperature is controlled at 44-46 DEG C, keeps paraffin remover temperature consistent with bath temperature.The standard paraffin wax ball for being 1g by quality
It immerses in paraffin remover, being completely dissolved the time is 25min, and rate of dissolution reaches 0.04g/min.
5, the paraffin remover in 15ml embodiment 5 is measured in tool plug graduated cylinder, is placed in thermostat water bath and is preheated 15min, it will
Water bath with thermostatic control temperature is controlled at 44-46 DEG C, keeps paraffin remover temperature consistent with bath temperature.The standard paraffin wax ball for being 1g by quality
It immerses in paraffin remover, being completely dissolved the time is 30min, and rate of dissolution reaches 0.33g/min.
6, the paraffin remover in 15ml embodiment 6 is measured in tool plug graduated cylinder, is placed in thermostat water bath and is preheated 15min, it will
Water bath with thermostatic control temperature is controlled at 44-46 DEG C, keeps paraffin remover temperature consistent with bath temperature.The standard paraffin wax ball for being 1g by quality
It immerses in paraffin remover, being completely dissolved the time is 35min, and rate of dissolution reaches 0.29g/min.
From above-mentioned test example 4: each paraffin remover wax removal excellent effect prepared by the present invention, therefore paraffin remover of the invention
Good wax removal effect can obtained for the wax precipitation in regular gasoline well.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of paraffin remover, which is characterized in that according to weight percentage include following component: ethylene-vinyl acetate copolymer
0.1-3%, dichloroethanes 1-2%, polyacrylate 0.5-0.8%, styrene 1-2%, dispersing agent 0.1-0.5%, bleeding agent
0.1-0.3%, pour-point depressant 0.1-1% and surplus C9 aromatic.
2. paraffin remover according to claim 1, which is characterized in that according to weight percentage include following component: ethylene-
Acetate ethylene copolymer 1.55%, dichloroethanes 1.5%, polyacrylate 0.65%, styrene 1.5%, dispersing agent 0.3%,
Bleeding agent 0.2%, pour-point depressant 0.55% and C9 aromatic 93.75%.
3. paraffin remover according to claim 1 or 2, which is characterized in that the pour-point depressant is prepared via a method which to obtain:
After Long Chain Alkyl Acrylate is dissolved in toluene, initiator is added, after being heated to reflux 3h, obtains the pour-point depressant；The initiation
The quality of agent is the 0.1% of the Long Chain Alkyl Acrylate quality；
The initiator is the mixture of benzoyl peroxide, hydrogen peroxide and sodium formaldehyde sulfoxylate, wherein the benzoyl peroxide,
The mass ratio of hydrogen peroxide and sodium formaldehyde sulfoxylate is 1:1:1.
4. paraffin remover according to claim 1 or 2, which is characterized in that the dispersing agent is selected from Sodium Polyacrylate.
5. paraffin remover according to claim 1 or 2, which is characterized in that the bleeding agent is selected from fatty alcohol polyoxyethylene ether.
6. the preparation method of any paraffin remover of claim 1-5, which comprises the steps of:
By the ethylene-vinyl acetate copolymer, dichloroethanes, polyacrylate, styrene, dispersing agent, bleeding agent, pour-point depressant
And after carbon nine mixes, it is heated to 50-80 DEG C, 2-5h is stirred, the paraffin remover is made.
7. the preparation method of paraffin remover according to claim 6, which is characterized in that the revolving speed of the stirring is 200~300
Rev/min.
8. any paraffin remover of claim 1 to 5 is to the application in condensate gas well wax removal.
9. the method that a kind of pair of condensate gas well carries out wax removal, which is characterized in that by any paraffin remover of claim 1 to 5
It injects to impregnate in the production pipe in the condensate gas well and carries out wax removal.
10. according to the method described in claim 9, it is characterized in that, the time of the immersion is 5-12h.
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Cited By (3)
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| CN115746811A (en) * | 2022-11-17 | 2023-03-07 | 中国石油天然气集团有限公司 | Wax-proof pour point depressant for shale oil reservoir and preparation method thereof |
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| CN115746811A (en) * | 2022-11-17 | 2023-03-07 | 中国石油天然气集团有限公司 | Wax-proof pour point depressant for shale oil reservoir and preparation method thereof |
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