CN101353188A - Method for removing polymer flooding teritary oil extraction waste water impurity - Google Patents
Method for removing polymer flooding teritary oil extraction waste water impurity Download PDFInfo
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- CN101353188A CN101353188A CNA200810195691XA CN200810195691A CN101353188A CN 101353188 A CN101353188 A CN 101353188A CN A200810195691X A CNA200810195691X A CN A200810195691XA CN 200810195691 A CN200810195691 A CN 200810195691A CN 101353188 A CN101353188 A CN 101353188A
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Abstract
The invention discloses a method that a tube-typed micro-filtration membrane or an ultrafiltration membrane pretreats nanofiltration so as to remove the three-time oil extraction wastewater impurity including polymer flooding. The method is that: firstly, after oil removing is carried out on the oil extraction wastewater including polymer flooding, coagulation, air floatation or fiber-ball, and the like, is adopted for primary filtration; then, the oil extraction wastewater including polymer flooding enters into a tube-typed micro-filtration or ultrafiltration membrane device, backflushing or backwashing is adopted when working for maintaining long stability of membrane flux; tubular film producing water is filtered and desalted by passing through nanofiltration, the rate of desalination is 30%-95% (500 PPM NaCl), the operation pressure is 5 Bar-25 Bar, nanofiltration producing water is entirely satisfied with the requirements for confecting the water used for removing oil by polymer, the viscosity of the confected solution including polymer reaches 40 mPA.S-70 mPA.S, which is more than the viscosity (about 40 mPA.S) of the solution including polymer confected by using tap water and is entirely satisfied with the water use requirements for confecting the polymer (polyacrylamide) including polymer by flooding three-time oil extraction, and the polymer loading can be reduced.
Description
Technical field:
The present invention relates generally to a kind of treatment process of oil extraction waste water, specifically is a kind of method that contains impurity such as poly-flooding tertiary oil recovery waste water salt that removes with nanofiltration membrane.
Background technology:
Along with the increase of the oil-field development degree of depth, recover the oil and adopt water flooding regime substantially in the oil field, and the crude oil water content and the oil field produced water yield constantly increase, and waste water is excessive to efflux ordinary production and the ecotope of the problem of exceeding standard serious threat to the oil field with waste water.A kind of wasting of resources is not only in the discharging of oil extraction-generated waste water, and serious environment pollution.Therefore, the oil extraction-generated waste water resource utilization is the important measures that solve the oil field deterioration of the ecological environment, control ground water regime catastrophe variation.
An oil production waste water in oil field part after treatment is used as re-injection water, and a part effluxes.Therefore, provide qualified re-injection water water quality, satisfy the oil field and recover the oil, guaranteeing that oil field stable high yield has crucial meaning to requirements in water quality.
In containing poly-flooding tertiary oil recovery process, contain pollutents such as number of polymers (PAM), oil in water emulsion, suspended substance in the oil field produced waste water, this type of waste water is generally high rigidity and high salinity (greater than 3000mg/l), this waste water intractable, and directly exhaust emission is serious.
Summary of the invention:
The purpose of this invention is to provide the method that a kind of removal contains poly-flooding tertiary oil recovery waste water impurity, solve the pollution problem that occurs at present, remove the impurity that contains in the poly-flooding tertiary oil recovery waste water, make water can recycling, save tap water, reduce the influence of recovering the oil, reduce cost for oil production environment.
Technical scheme of the present invention is as follows:
Tube type filter membrance or ultra-filtration membrane pre-treatment add the nanofiltration membrane desalting treatment and remove the method that contains poly-flooding tertiary oil recovery waste water impurity, it is characterized in that:
(1), contain polymkeric substance (polyacrylamide (PAM)) and drive oil extraction waste water and passed through after the de-oiling, adopt coagulation or prefiltrations such as air supporting or fibrous nodules;
(2), enter tubular membrane micro-filtration or ultra-filtration membrane, the periosteum passage is selected diameter 5mm-25mm for use, membrane pore size is selected 0.2 micron for use to molecular weight cut-off 10,000DALTON membrane element, working pressure 1Bar-8Bar;
(3), periosteum produces water and separates through the nanofiltration membrane desalination, it is 30%---95% (500PPM sodium-chlor) that nanofiltration membrane is selected ratio of desalinization for use, working pressure is selected 5Bar-25Bar for use, nanofiltration membrane is produced water and is used for:
A, contain polymer flooding tertiary oil recovery configuration polymkeric substance (polyacrylamide (PAM) water, the viscosity that contains polymers soln of configuration reaches 40mPA.S-70mPA.S, greater than containing polymer solution viscosity (about 40mPA.S) with tap water configuration, satisfy fully and contain the requirement of polymer flooding tertiary oil recovery configuration polymkeric substance (polyacrylamide) water, and can reduce polymer loading, or
The re-injection of b, hyposmosis oil well requires under the direct reinjection well,
The re-injection water that the dense water of nanofiltration membrane can satisfy the hyposmosis oil well requires under the direct reinjection well, and the working pressure of nanofiltration membrane is selected 5Bar-25Bar for use;
(4), periosteum produces the re-injection water that water also can reach the hyposmosis oil well and requires under the direct reinjection well,
Adopt recoil or backwash to keep the long-time stable of membrane flux when (5), periosteum is worked.
Described tube type filter membrance or ultra-filtration membrane pre-treatment add nanofiltration membrane and remove the method that contains poly-flooding tertiary oil recovery waste water impurity, it is characterized in that described periosteum passage selects diameter 5mm-10mm for use, membrane pore size is selected 0.2 micron for use to molecular weight cut-off 200, the 000DALTON membrane element, working pressure 1Bar-6Bar; Periosteum produces water through impurity such as nanofiltration membrane filtration, desalinations, and the nanofiltration membrane ratio of desalinization of selecting for use is 30%---50% (a 500PPM sodium-chlor), and working pressure is selected 5BAR-15BAR for use.
Described tube type filter membrance or ultra-filtration membrane pre-treatment add nanofiltration membrane and remove the method that contains poly-flooding tertiary oil recovery waste water impurity, it is characterized in that described periosteum passage selects diameter 5mm-15mm for use, membrane pore size is selected 0.05 micron for use to molecular weight cut-off 200, the 000DALTON membrane element, working pressure 1Bar-6Bar; Periosteum produces water through impurity such as nanofiltration membrane filtration, desalinations, and the nanofiltration membrane ratio of desalinization of selecting for use is 50%---95% (a 500PPM sodium-chlor), and working pressure is selected 8BAR-20BAR for use.
Described tube type filter membrance or ultra-filtration membrane pre-treatment add nanofiltration membrane and remove the method that contains poly-flooding tertiary oil recovery waste water impurity, it is characterized in that described periosteum passage selects diameter 10mm-25mm for use, membrane pore size is selected 0.03 micron for use to molecular weight cut-off 50, the 000DALTON membrane element, working pressure 1Bar-8Bar; Periosteum produces water through impurity such as nanofiltration membrane filtration, desalinations, and the nanofiltration membrane ratio of desalinization of selecting for use is 35%---70% (a 500PPM sodium-chlor), and working pressure is selected 10BAR-25BAR for use.
After oil extraction waste water process tube type filter membrance of the present invention or tubular ultra-filtration membrane are handled, oil-containing is dropped to below the 2PPM, SS drops to below the 1.0PPM, and median particle size drops to below 1.0 microns, and polymkeric substance reduces more than 50%; The permeate water that micro-filtration or ultra-filtration membrane produce enters nanofiltration membrane filtration, desalination, removes the Ca of 30%--95% in the waste water
2+, Mg
2+, Cl
-1, SO
4 2-Ions etc., former salinity is dropped to below the 300mg/l-1500mg/l by 5000mg/l, wherein Ca
2+, Mg
2+Drop to below the 2mg/l, oil-containing drops to below the 1PPM, and SS drops to below the 1PPM, and median particle size satisfies the requirement of prepared polymer displacement of reservoir oil water fully less than 1 micron.The dense water that nanofiltration membrane produces, the re-injection that can also reach the hyposmosis oil well requires under the direct reinjection well.
Advantage of the present invention is:
The present invention poly-carries out cycling and reutilization after driving the oil extraction waste water step-by-step processing to containing, and economizes on a large amount of tap water and comes prepared polymer solution, reduced and recovered the oil to the pollution of environment, and periosteum anti-pollution ability is strong, the life-span is long, and cost of use is low; Nanofiltration membrane is reliable, and energy consumption is low, and the life-span is long, and expense is low, has reduced cost for oil production.
Embodiment:
Tube type filter membrance or ultra-filtration membrane pre-treatment add nanofiltration membrane and remove the method that contains poly-flooding tertiary oil recovery waste water impurity, are to carry out following steps successively to realize:
At first, will contain and poly-drive oil extraction waste water and passed through after the de-oiling, adopt coagulation or prefiltrations such as air supporting or fibrous nodules;
Secondly, make the water after the filtration enter tube type filter membrance or tubular ultra-filtration membrane.Micro-filtration or ultra-filtration membrane adopt high resistant to pollution tubular membrane element, the periosteum passage is selected diameter 5mm-25mm for use, and membrane pore size is selected 0.2 micron for use to molecular weight cut-off 10,000DALTON membrane element, working pressure 1Bar-8Bar adopts recoil or backwash to keep the long-time stable of membrane flux during work.This step drops to below the 3PPM oil-containing, and SS drops to below the 1PPM, and median particle size drops to below 1.0 microns, and polymkeric substance reduces more than 50%;
Next, again tubular membrane is produced water through nanofiltration membrane filter, desalination, nanofiltration membrane is selected high anti-pollution, membrane element that wetting ability is fabulous for use, ratio of desalinization 30%---95%, working pressure is selected 5Bar-25Bar for use, produces water salinity and drops to below the 300mg/l-1500mg/l, wherein Ca
2+, Mg
2+Drop to below the 2mg/l, produce water with this nanofiltration membrane and come prepared polymer (PAM content 1000PPM) soltion viscosity greater than 40mPa.
This operation removes the Ca of 30%--95% in the waste water
2+, Mg
2+, Cl
-1, SO
4 2-Plasma, salinity drop to below the 300mg/l-1500mg/l, wherein Ca
2+, Mg
2+Drop to below the 2mg/l, oil-containing drops to below the 1PPM, and SS drops to below the 1PPM, and median particle size satisfies the requirement of prepared polymer displacement of reservoir oil water fully less than 1 micron;
At last, the re-injection that reaches the hyposmosis oil well of nanofiltration dope requires under the direct reinjection well.
Claims (4)
1, tube type filter membrance or ultra-filtration membrane pre-treatment add the method that the removal of nanofiltration membrane desalting treatment contains poly-flooding tertiary oil recovery waste water impurity, it is characterized in that:
(1), contain polymkeric substance (polyacrylamide (PAM)) and drive oil extraction waste water and passed through after the de-oiling, adopt coagulation or prefiltrations such as air supporting or fibrous nodules;
(2), enter tubular membrane micro-filtration or ultra-filtration membrane, the periosteum passage is selected diameter 5mm-25mm for use, membrane pore size is selected 0.2 micron for use to molecular weight cut-off 10,000DALTON membrane element, working pressure 1Bar-8Bar;
(3), periosteum produces water and separates through the nanofiltration membrane desalination, it is 30%---95% (500PPM sodium-chlor) that nanofiltration membrane is selected ratio of desalinization for use, working pressure is selected 5Bar-25Bar for use, nanofiltration membrane is produced water and is used for:
A, contain polymer flooding tertiary oil recovery configuration polymkeric substance (polyacrylamide (PAM) water, the viscosity that contains polymers soln of configuration reaches 40mPA.S-70mPA.S, greater than containing polymer solution viscosity (about 40mPA.S) with tap water configuration, satisfy fully and contain the requirement of polymer flooding tertiary oil recovery configuration polymkeric substance (polyacrylamide) water, and can reduce polymer loading, or
The re-injection of b, hyposmosis oil well requires under the direct reinjection well,
The re-injection water that the dense water of nanofiltration membrane can satisfy the hyposmosis oil well requires under the direct reinjection well, and the working pressure of nanofiltration membrane is selected 5Bar-25Bar for use;
(4), periosteum produces the re-injection water that water also can reach the hyposmosis oil well and requires under the direct reinjection well,
Adopt recoil or backwash to keep the long-time stable of membrane flux when (5), periosteum is worked.
2, tube type filter membrance according to claim 1 or ultra-filtration membrane pre-treatment add nanofiltration membrane and remove the method that contains poly-flooding tertiary oil recovery waste water impurity, it is characterized in that described periosteum passage selects diameter 5mm-10mm for use, membrane pore size is selected 0.2 micron for use to molecular weight cut-off 200, the 000DALTON membrane element, working pressure 1Bar-6Bar; Periosteum produces water through impurity such as nanofiltration membrane filtration, desalinations, and the nanofiltration membrane ratio of desalinization of selecting for use is 30%---50% (a 500PPM sodium-chlor), and working pressure is selected 5BAR-15BAR for use.
3, tube type filter membrance according to claim 1 or ultra-filtration membrane pre-treatment add nanofiltration membrane and remove the method that contains poly-flooding tertiary oil recovery waste water impurity, it is characterized in that described periosteum passage selects diameter 5mm-15mm for use, membrane pore size is selected 0.05 micron for use to molecular weight cut-off 200, the 000DALTON membrane element, working pressure 1Bar-6Bar; Periosteum produces water through impurity such as nanofiltration membrane filtration, desalinations, and the nanofiltration membrane ratio of desalinization of selecting for use is 50%---95% (a 500PPM sodium-chlor), and working pressure is selected 8BAR-20BAR for use.
4, tube type filter membrance according to claim 1 or ultra-filtration membrane pre-treatment add nanofiltration membrane and remove the method that contains poly-flooding tertiary oil recovery waste water impurity, it is characterized in that described periosteum passage selects diameter 10mm-25mm for use, membrane pore size is selected 0.03 micron for use to molecular weight cut-off 50, the 000DALTON membrane element, working pressure 1Bar-8Bar; Periosteum produces water through impurity such as nanofiltration membrane filtration, desalinations, and the nanofiltration membrane ratio of desalinization of selecting for use is 35%---70% (a 500PPM sodium-chlor), and working pressure is selected 10BAR-25BAR for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810195691XA CN101353188A (en) | 2008-09-02 | 2008-09-02 | Method for removing polymer flooding teritary oil extraction waste water impurity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810195691XA CN101353188A (en) | 2008-09-02 | 2008-09-02 | Method for removing polymer flooding teritary oil extraction waste water impurity |
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| Publication Number | Publication Date |
|---|---|
| CN101353188A true CN101353188A (en) | 2009-01-28 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372381A (en) * | 2010-08-12 | 2012-03-14 | 中国石油天然气股份有限公司 | Method for preparing polymer for oil displacement with injected water in oil reservoir |
| CN102421965A (en) * | 2009-05-14 | 2012-04-18 | 吉奥法布里克斯有限公司 | Trackbed liner and related methods |
| CN104556531A (en) * | 2013-10-12 | 2015-04-29 | 中国石油化工股份有限公司 | Oil filed sewage treatment method for preparing oil-production polymer solution |
| CN105060582A (en) * | 2015-09-02 | 2015-11-18 | 波鹰(厦门)科技有限公司 | Oil production wastewater processing and recycling method |
| CN105060573A (en) * | 2015-09-16 | 2015-11-18 | 成都美富特膜科技有限公司 | Gas-field wastewater treatment technology based on special membrane |
| CN105668845A (en) * | 2016-01-14 | 2016-06-15 | 天津海蓝诺环保工程有限公司 | Treatment method with oilfield produced water used as reinjection water |
| CN109863123A (en) * | 2016-10-26 | 2019-06-07 | 苏特沃克技术有限公司 | The controlled recovered water desalting processing for being used to improve the recovery of hydrocarbons rate |
-
2008
- 2008-09-02 CN CNA200810195691XA patent/CN101353188A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102421965A (en) * | 2009-05-14 | 2012-04-18 | 吉奥法布里克斯有限公司 | Trackbed liner and related methods |
| CN102421965B (en) * | 2009-05-14 | 2014-08-20 | 吉奥法布里克斯有限公司 | Trackbed liner and related methods |
| CN102372381A (en) * | 2010-08-12 | 2012-03-14 | 中国石油天然气股份有限公司 | Method for preparing polymer for oil displacement with injected water in oil reservoir |
| CN102372381B (en) * | 2010-08-12 | 2013-04-24 | 中国石油天然气股份有限公司 | Method for preparing polymer for oil displacement with injected water in oil reservoir |
| CN104556531A (en) * | 2013-10-12 | 2015-04-29 | 中国石油化工股份有限公司 | Oil filed sewage treatment method for preparing oil-production polymer solution |
| CN104556531B (en) * | 2013-10-12 | 2017-06-30 | 中国石油化工股份有限公司 | A kind of process for treating oil field sewage for preparing oil recovery polymer solution |
| CN105060582A (en) * | 2015-09-02 | 2015-11-18 | 波鹰(厦门)科技有限公司 | Oil production wastewater processing and recycling method |
| CN105060573A (en) * | 2015-09-16 | 2015-11-18 | 成都美富特膜科技有限公司 | Gas-field wastewater treatment technology based on special membrane |
| CN105060573B (en) * | 2015-09-16 | 2017-05-31 | 成都美富特膜科技有限公司 | Gas field wastewater handling process based on special membrane |
| CN105668845A (en) * | 2016-01-14 | 2016-06-15 | 天津海蓝诺环保工程有限公司 | Treatment method with oilfield produced water used as reinjection water |
| CN105668845B (en) * | 2016-01-14 | 2018-08-24 | 天津海蓝诺环保工程有限公司 | Using offshore oilfield recovered water as the processing method of reinjected water |
| CN109863123A (en) * | 2016-10-26 | 2019-06-07 | 苏特沃克技术有限公司 | The controlled recovered water desalting processing for being used to improve the recovery of hydrocarbons rate |
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Open date: 20090128 |