CN101250393B - Treating agent containing polymer extraction liquid - Google Patents
Treating agent containing polymer extraction liquid Download PDFInfo
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- CN101250393B CN101250393B CN2008101031730A CN200810103173A CN101250393B CN 101250393 B CN101250393 B CN 101250393B CN 2008101031730 A CN2008101031730 A CN 2008101031730A CN 200810103173 A CN200810103173 A CN 200810103173A CN 101250393 B CN101250393 B CN 101250393B
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Abstract
The invention relates to a treating agent which contains polymer produced liquid, which is applied in polymer oil displacement or weak gel which contains polymer, displaces oil and stores produced liquid. The invention is characterized in that percentage by weight of each component is that viscosity reductant, which comprises ferrous sulfate (FeSO4.7H2O), wherein the dosage is 2.5%-25%, or potassium permanganate (KMnO4), whose dosage is 0.5%-10%, additive which comprises ferric chloride(FeCl3), wherein the dosage is 0.05%-1.25%, stabilizing agent which comprises acetic acid whose dosage is 0.1%-0.75%, or citric acid whose dosage is 0.25%-1.25%, and rest is water. The treating agent has the advantages that the treating agent has viscosity reducing effect to produced liquid which contains polymer with different polymer contents. The treating agent adopts KYHPAM and 3730A polymer to respectively allocate simulated produced fluids, when the content of polymer is 50-1000mg/L, optimum dosageof next treating agent of each content is added, solution viscosity under indoor temperature can be lowered to 3.0MPa.s(which is equal to formation water viscosity 3.0MPa.s which is measured under the same condition), thereby eliminating the influence of polymer viscosifying effect to the settling separation of oil and water.
Description
Technical field:
The present invention relates to oil recovery technique field, oil field, particularly a kind of chemical assistant that is used for polymer flooding or contains the weak gel oil reservoirs extraction liquid processing of polymkeric substance.
Background technology:
In the exploitation of oil, the technician is in order to improve oil recovery factor, adopted polymer flooding or contained the tertiary oil recovery technologies such as the weak gel displacement of reservoir oil of polymkeric substance at dissimilar oil reservoirs.Cause and contain certain density polymkeric substance in the oil reservoir produced liquid, make profit natural subsidence velocity of separation slow down, be difficult to more handle than the conventional waterflood flooding produced liquid.Mainly be since in the oil displacement process polymkeric substance that adopts change through degraded and group through behind the underground long duration of action, the little polymkeric substance of relative molecular mass simultaneously and crude oil and water effect causes the increase of extraction fluid viscosity, emulsification of crude oil serious.The extraction liquid that contains certain density polymkeric substance, the weak effect when emulsion splitter that adopts conventional water displacing oil to use is handled, water content height in the isolated crude oil; Contain all against regulation requirement of oil index in the sewage, even the serious stage that influences ordinary production to being difficult to handle.
For solution contains the difficult problem that polymer flooding extraction liquid is handled, exploratory study has also been carried out in relevant oil field successively, its result of study mostly is according to each oil reservoir oil property, adopt increasing emulsion splitter consumption or dissimilar demulsifier compounds to solve, do not form a poly-flooding produced liquid treatment technology that adaptability is stronger.Most oily water separations in the extraction liquid are come out, and still have residual water but separate in the crude oil.Owing to not only also have residual water in the crude oil after separating, but also contain polymkeric substance, when handling, cause apparatus for electrodewatering work undesired through next step electro-dewatering operation.In addition, because the greatest differences of each oil reservoir oil property, these treatment processs can not form the treatment technology of wide spectrum, more can not fundamentally solve the handling problem that contains polymer produced liquid.
In a word, adopt polymer flooding or contain in the polymer weak gel displacement of reservoir oil tertiary oil recovery technology at latter period of oilfield development, the dehydrating of crude oil aspect shows as: dehydration rate reduces, the sewage downgrade, water-oil interface are unintelligible and the middle layer is arranged, and the electro-dewatering system can not normally move.Showing as of dehydration sewage disposal aspect, back: oily water separation speed slows down, and sewage treatment capacity descends, and oil content of wastewater exceeds standard.
Summary of the invention
The objective of the invention is: a kind of treatment agent that contains polymer produced liquid is provided, from the influence of eliminating polymer molecular chain, reduce the extraction fluid viscosity, develops a kind of treatment agent that contains poly-extraction liquid processing at polymer flooding or the weak gel oil reservoirs that contains polymkeric substance.Make treatment agent insensitive, have broad spectrum, polymer hydration degraded, soltion viscosity in the extraction liquid are reduced, but also can reduce the emulsion splitter consumption, improve the dewatering efficiency of emulsion splitter oil property.
The technical solution used in the present invention is: contain the treatment agent of polymer produced liquid, the each component weight percent is:
Viscosity-depression agent: ferrous sulfate (FeSO
47H
2O), consumption 2.5%～25%; Or potassium permanganate (KMnO
4), consumption 0.5%～10%;
Additive: iron trichloride (FeCl
3), consumption 0.05%～1.25%;
Stablizer: acetate, consumption 0.1%～0.75%; Or citric acid, consumption 0.25%～1.25%;
All the other are water.
The preparation method who contains the treatment agent of polymer produced liquid: in reactor, add clear water, be preheated to 50～55 ℃, constant temperature 30～45min, add viscosity-depression agent, additive, stablizer successively, stirring reaction 2～2.5h under 50 ℃ of temperature condition emits and is cooled to room temperature, and is standby.
The using method that contains the treatment agent of polymer produced liquid:
Field by using pipeline dosing method, required medicine machine is made up of grug feeding jar, volume pump and auxiliary line, valve etc.
Use step:
1) snack made with traditional Chinese medicines that adds on the pipeline that enters the station is installed the medicine machine that grug feeding jar, volume pump, auxiliary line, valve etc. are formed;
2) determine treatment agent day to add dose according to extraction liquid daily flow and polymer concentration in the pipeline that enters the station, adjust the volume pump discharge capacity and evenly add the treatment agent that contains polymer produced liquid, the treatment agent consumption that contains polymer produced liquid is 0.2 of extraction liquid～5 ‰.
Working conditions:
Polymer content in the extraction liquid: 50～1000mg/L;
Use temperature: room temperature～60 ℃.
Beneficial effect of the present invention: the present invention sets about from research high molecular polymer constructional feature, in the poly-oil reservoirs extraction liquid of analysis and summary on the influence factor basis of polymkeric substance to extraction liquid treatment effect, is the viscosity of external phase according to Stoke ' s to influencing the settlement separate principal element of profit, the principle analysis of disperse phase and external phase density difference and droplet dia, adopt the principle of polymkeric substance oxidative degradation and chemical degradation, with chemical agent commonly used is main raw material, be aided with the chemical industry additive raw material that can improve action effect, determine by the screening that each raw material is formed, consumption changes and the compatibleness test, optimize and draw basic chemical constitution and the consumption that contains poly-extraction liquid treatment agent, and it is perfect by improving after the relevant performance investigation, propose stronger the containing of a kind of adaptability and gather extraction liquid treatment agent new departure, cooperate and the compatible emulsion splitter of oil reservoir, water content in crude oil was not more than 0.5% branded oil standard after realization contained poly-extraction liquid breaking emulsion and dewatering; Oleaginousness reaches simultaneously and effluxes requirement in the sewage.Overcome to gather and drive the unicity that emulsion splitter can only be applicable to that compatible oil reservoir produced liquid is handled, and the difficult problem that can not eliminate the oil-water emulsion layer fully.
Laboratory test results shows that the treatment agent of different amounts all has certain viscosity reducing effect to the polymers soln of different amounts.Adopt KYHPAM and 3730A polymkeric substance to dispose simulation extraction liquid respectively, when polymer content is 50～1000mg/L, the optimum amount that adds treatment agent under each content can make soltion viscosity reduce to 3.0mPas (equating with the local water viscosity 3.0mPas that records under the equal conditions) under the room temperature.
Embodiment
In the present embodiment, the chemical feedstocks that is adopted is technical grade product, and additional proportion all is weight percentage.
Embodiment 1: the treatment agent each component weight percent that contains polymer produced liquid is:
Viscosity-depression agent: ferrous sulfate (FeSO
47H
2O), consumption 2.5%;
Additive: iron trichloride (FeCl
3), consumption 0.05%;
Stablizer: acetate, consumption 0.1%;
All the other are water.
The preparation method who contains the treatment agent of polymer produced liquid: in reactor, add the 1947kg clear water, be preheated to 50 ℃, constant temperature 30min, add viscosity-depression agent 50kg, additive 1.0kg, stablizer 2.0kg successively by the design dosage, stirring reaction 2h under 50 ℃ of temperature condition, emit and be cooled to room temperature, standby.
The using method that contains the treatment agent of polymer produced liquid:
Field by using pipeline dosing method, required medicine machine is made up of grug feeding jar, volume pump and auxiliary line, valve etc.
Use step:
1) snack made with traditional Chinese medicines that adds on the pipeline that enters the station is installed the medicine machine that grug feeding jar, volume pump, auxiliary line, valve etc. are formed;
2) enter the station when the polymer concentration in the extraction liquid is 50mg/L in the pipeline, prepare treatment agent by treatment agent each component weight percent among the embodiment 1;
3) enter the station that extraction liquid daily flow is 1000m in the pipeline
3During/d, determining to add treatment agent day dose is 2.0m
3/ d adjusts the volume pump discharge capacity and carries out even dosing.
Working conditions:
Polymer content in the extraction liquid: 50～1000mg/L;
Use temperature: room temperature～60 ℃.
The each component weight percent of 1--16 embodiment adopts the tabulation mode to represent, is listed as follows:
Table 1 contains the prescription of poly-extraction liquid treatment agent
| Project | Viscosity-depression agent, % | Additive (FeCl 3)，％ | Stablizer, % | Water |
| Embodiment 1 | 2.5(FeSO 4·7H 2O) | 0.05 | (0.1 acetate) | Surplus |
| Embodiment 2 | 2.5(FeSO 4·7H 2O) | 0.05 | (0.25 citric acid) | Surplus |
| Embodiment 3 | 0.5(KMnO 4) | 0.05 | (0.1 acetate) | Surplus |
| Embodiment 4 | 0.5(KMnO 4) | 0.05 | (0.25 citric acid) | Surplus |
| Embodiment 5 | 5.0(FeSO 4·7H 2O) | 0.6 | (0.45 acetate) | Surplus |
| Embodiment 6 | 5.0(FeSO 4·7H 2O) | 0.6 | (0.6 citric acid) | Surplus |
| Embodiment 7 | 5.0(KMnO 4) | 0.6 | (0.45 acetate) | Surplus |
| Embodiment 8 | 5.0(KMnO 4) | 0.6 | (0.6 citric acid) | Surplus |
| Embodiment 9 | 15.0(FeSO 4·7H 2O) | 1.0 | (0.55 acetate) | Surplus |
| Embodiment 10 | 15.0(FeSO 4·7H 2O) | 1.0 | (1.0 citric acid) | Surplus |
| Embodiment 11 | 7.5(KMnO 4) | 1.0 | (0.55 acetate) | Surplus |
| Project | Viscosity-depression agent, % | Additive (FeCl 3)，％ | Stablizer, % | Water |
| Embodiment 12 | 7.5(KMnO 4) | 1.0 | (1.0 citric acid) | Surplus |
| Embodiment 13 | 25.0(FeSO 4·7H 2O) | 1.25 | (0.75 acetate) | Surplus |
| Embodiment 14 | 25.0(FeSO 4·7H 2O) | 1.25 | (1.25 citric acid) | Surplus |
| Embodiment 15 | 10.0(KMnO 4) | 1.25 | (0.75 acetate) | Surplus |
| Embodiment 16 | 10.0(KMnO 4) | 1.25 | (1.25 citric acid) | Surplus |
Owing at the processing of different wells, different polymer produced liquids, when selecting for use the present invention to contain the treatment agent of polymer produced liquid, need test targetedly, adjust to best effect.Recommend to use prescription to adjust targetedly as embodiment 1 or on the basis of embodiment 14.
Claims (1)
1. treatment agent that contains polymer produced liquid, it is characterized in that: the each component weight percent is:
Viscosity-depression agent: ferrous sulfate (FeSO
4.7H
2O), consumption 2.5%～25%; Or potassium permanganate (KMnO
4), consumption 0.5%～10%;
Additive: iron trichloride (FeCl
3), consumption 0.05%～1.25%;
Stablizer: acetate, consumption 0.1%～0.75%; Or citric acid, consumption 0.25%～1.25%;
All the other are water;
The preparation method: add clear water in reactor, be preheated to 50～55 ℃, constant temperature 30～45min adds viscosity-depression agent, additive, stablizer successively, and stirring reaction 2～2.5h under 50 ℃ of temperature condition emits and is cooled to room temperature, and is standby;
Using method:
Field by using pipeline dosing method, required medicine machine is made up of grug feeding jar, volume pump and auxiliary line, valve;
Use step:
1) medicine machine that adds snack made with traditional Chinese medicines installation grug feeding jar, volume pump, auxiliary line, valve composition on the pipeline that enters the station;
2) determine treatment agent day to add dose according to extraction liquid daily flow and polymer concentration in the pipeline that enters the station, adjust the volume pump discharge capacity and evenly add the treatment agent that contains polymer produced liquid, the treatment agent consumption that contains polymer produced liquid is 0.2 of extraction liquid～5 ‰;
Working conditions:
Polymer content in the extraction liquid: 50～1000mg/L;
Use temperature: room temperature～60 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101031730A CN101250393B (en) | 2008-04-01 | 2008-04-01 | Treating agent containing polymer extraction liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101031730A CN101250393B (en) | 2008-04-01 | 2008-04-01 | Treating agent containing polymer extraction liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101250393A CN101250393A (en) | 2008-08-27 |
| CN101250393B true CN101250393B (en) | 2010-06-02 |
Family
ID=39953997
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101031730A Active CN101250393B (en) | 2008-04-01 | 2008-04-01 | Treating agent containing polymer extraction liquid |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105062449A (en) * | 2015-08-10 | 2015-11-18 | 李佳芯 | Compound ion fluorinated alkyl sodium sulfate polymer degradation agent and preparation method and application thereof |
| CN105349177B (en) * | 2015-10-19 | 2017-08-29 | 长江大学 | Remove the method containing water-soluble polymer in poly- crude oil |
| CN110093178A (en) * | 2019-04-25 | 2019-08-06 | 河北华北石油天成实业集团有限公司 | A kind of demulsifier, preparation method and application method for the dehydration of Complex Reservoir produced liquid in oil well mixture |
| CN112852476B (en) * | 2020-12-26 | 2022-11-15 | 中海油天津化工研究设计院有限公司 | Polymer-containing produced liquid demulsifier and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103628A (en) * | 1993-12-11 | 1995-06-14 | 李圭白 | Drinking water purifying technique with compound permanganate medicament |
| CN1120023A (en) * | 1995-04-25 | 1996-04-10 | 华北制药厂 | Disposal method of sulfur-contained organic effluent and gas purifying special equipment-gas balancing apparatus |
| CN1750997A (en) * | 2003-02-21 | 2006-03-22 | 泊尔水净化产品股份有限公司 | Water treatment compositions with masking agent |
-
2008
- 2008-04-01 CN CN2008101031730A patent/CN101250393B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103628A (en) * | 1993-12-11 | 1995-06-14 | 李圭白 | Drinking water purifying technique with compound permanganate medicament |
| CN1120023A (en) * | 1995-04-25 | 1996-04-10 | 华北制药厂 | Disposal method of sulfur-contained organic effluent and gas purifying special equipment-gas balancing apparatus |
| CN1750997A (en) * | 2003-02-21 | 2006-03-22 | 泊尔水净化产品股份有限公司 | Water treatment compositions with masking agent |
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|---|---|
| CN101250393A (en) | 2008-08-27 |
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