CN101088937A - Process of treating ternary combination flooding sewage - Google Patents

Process of treating ternary combination flooding sewage Download PDF

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Publication number
CN101088937A
CN101088937A CN 200710118093 CN200710118093A CN101088937A CN 101088937 A CN101088937 A CN 101088937A CN 200710118093 CN200710118093 CN 200710118093 CN 200710118093 A CN200710118093 A CN 200710118093A CN 101088937 A CN101088937 A CN 101088937A
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CN
China
Prior art keywords
sewage
ternary combination
combination flooding
treatment
flooding
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CN 200710118093
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Chinese (zh)
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CN100554191C (en
Inventor
高雁鸣
刘兴玉
龚淑楠
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Daqing demeitel Technology Co., Ltd.
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Dafeng Oil Field Tech Co Ltd Daqing
BEIJING HAI'ENRUNDE CHEMICAL SCI-TECH Co Ltd
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Priority to CNB2007101180938A priority Critical patent/CN100554191C/en
Publication of CN101088937A publication Critical patent/CN101088937A/en
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Abstract

The process of treating ternary combination flooding sewage includes the following steps: oil-water separation; adding pH regulator in 1000-6000 mg/l into the sewage to regulate pH to 5.0-7.5; adding coagulant in 500-5000 mg/l into the sewage; adding organic flocculant in 100-1000 mg/l into the sewage; standing to deposit and separating out the flocculated matter; and filtering. The process can treat great amount of ternary combination flooding sewage into qualified injected water to prevent environmental pollution and recover great amount of oil.

Description

Process for the treatment of ternary combination flooding sewage
Technical field
The present invention relates to the method that a kind of produced fluids during asp-flooding that is used for the oil recovery factory, oil field is handled.
Background technology
At present, Daqing oil field has carried out ternary composite oil-displacing on a large scale, small-scale ternary composite oil-displacing has also been carried out in oil fields such as triumph, the Liaohe River, all obtained the effect that significantly improves oil recovery factor, but prolongation along with the time of oil recovery, the content of the polymkeric substance that returns out in the extraction liquid, tensio-active agent and alkali etc. is more and more higher, cause extraction liquid oil-water emulsion more and more serious, a difficult problem that has caused many urgent needs to solve, wherein be badly in need of to solve and the most scabrous be exactly the handling problem of ternary composite driving oily water.Produced fluids during asp-flooding is that ternary combination flooding produced liquid carries out the sewage that obtains after the oily water separation through breakdown of emulsion, because residual in the produced fluids during asp-flooding have a large amount of polymkeric substance, alkali and tensio-active agent etc., make the viscosity of sewage, the degree of scatter of oily emulsification degree and suspended solids increases in the sewage, make oily water separation, suspended solids is removed the very difficulty that becomes, in addition, because the molecular weight of the polymkeric substance in the produced fluids during asp-flooding is very big, polymer molecule can't pass through 0.45 μ m filter membrane of SY/T5329-95 " petroclastic rock reservoir water water quality is recommended index and analytical procedure " standard-required, and suspended solids content is exceeded standard, must just can make suspended solids content reach the oil field requirement polymkeric substance removal, just need a large amount of medicaments and remove polymkeric substance; Also have the pH value of produced fluids during asp-flooding higher, can be between 9.3-9.8, so high pH value has exceeded the use range of positively charged ion organic floculant and some inorganic coagulants.More than these problems all make produced fluids during asp-flooding handle to become difficulty, and the oil field is badly in need of and these sewage will be handled, and when avoiding contaminate environment, these sewage is turned waste into wealth, and reclaims crude oil and the qualified back of sewage disposal is used as re-injection water.
At present, the research that produced fluids during asp-flooding is handled is at the early-stage, and these research great majority are to study at the indoor simulation produced fluids during asp-flooding of experiment, its simulation water quality generally has very big difference with on-the-spot sewage, sewage water treatment method with simulated sewage research can not be applied to on-the-spot sewage disposal basically, by retrieval, do not see the patent of produced fluids during asp-flooding processing aspect.
Summary of the invention
The method that technical problem to be solved by this invention is to provide a kind of produced fluids during asp-flooding to handle utilizes this method to be processed into and to satisfy re-injection water every index request, qualified containing the live agent, wet goods produced fluids during asp-flooding of number of polymers, alkali, table.
The technical scheme that the present invention is taked for its technical problem of solution is:
Produced fluids during asp-flooding is handled: 1. add 1000-6000mgL in sewage after handling through oily water separation more successively according to the following steps -1PH value conditioning agent is regulated sewage pH value between 5.0-7.5; 2. in sewage, add 500-5000mgL -1Coagulating agent; 3. in sewage, add 100-1000mgL -1Organic floculant; 4. sewage is carried out standing sedimentation, from sewage, isolate the flco that abovementioned steps adds described coagulating agent and the generation of described organic floculant afterreaction; 5. sewage is sent into known filtration unit and filtered, and obtain qualified oilfield injection water at last; 3. 2. 1. above-mentioned steps be to carry out under the state that stirs all the time, and guarantee the pH value conditioning agent, coagulating agent, organic floculant and the sewage thorough mixing that are added.
Further, 3. 2. 1. above-mentioned steps directly carried out in sewage running piping or carried out in the reactor of sewage process respectively respectively.
Further, 4. above-mentioned steps carries out in slurry tank.
Above-mentioned pH value conditioning agent also can mix earlier mutually with coagulating agent, under condition of stirring, is that mixed multi-functional coagulating agent joins in the sewage in the reactor of sewage running piping or sewage process with mixed solution then.
Further, described pH value conditioning agent is one or more the mixture in hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, industrial waste salt acid, the industrial waste sulfuric acid.
Further, described coagulating agent is one or more the mixture in polymerize aluminum chloride, polyaluminium sulfate, PAFS, poly-silicon aluminum chloride, polymeric aluminum sulfate silicate, aluminum chloride, potassium aluminium sulfate, sodium aluminate, exsiccated ammonium alum, Tai-Ace S 150, magnesium chloride, the calcium chloride.
Further, described organic floculant is positively charged ion, nonionic and the anionic high molecular polymer of molecular weight more than 5,000,000 of polyacrylamide or modified starch series.
Handle back effluent quality: oleaginousness≤10mgL -1Suspended solids content≤10mgL -1PH6-9; Polyacrylamide does not detect; Colourity, water white transparency.
Effect of the present invention is that this method can be handled extremely unmanageable produced fluids during asp-flooding to up to standard, has entered industrial test, and treatment capacity is 5000M 3/ day.This technology not only can reclaim substantial oil, and main is becomes qualified injection water with the sewage disposal of a large amount of contaminate environment.
Description of drawings
Fig. 1 is first kind of embodiment processing technological flow figure of process for the treatment of ternary combination flooding sewage of the present invention;
Fig. 2 is second kind of embodiment processing technological flow figure of process for the treatment of ternary combination flooding sewage of the present invention.
Embodiment
As shown in Figure 1, produced fluids during asp-flooding is at first handled the crude oil that further reclaims in the sewage through oily water separation, and then under condition of stirring, the reactor by sewage running piping or sewage process adds 1000-6000mgL in sewage -1PH value conditioning agent makes conditioning agent and sewage thorough mixing, regulates sewage pH value between 5.0-7.5; Continuing under the condition of stirring, the reactor by sewage running piping or sewage process adds 500-5000mgL in sewage -1Coagulating agent, behind the thorough mixing, continue to stir and the reactor by sewage running piping or sewage process adds 100-1000mgL in sewage -1Organic floculant, behind the thorough mixing, sewage is sent into slurry tank, carrying out standing sedimentation handles, from sewage, separate with the flco that the organic floculant afterreaction generates adding coagulating agent, then sewage is sent into known filtration unit and carried out filtration treatment, obtain qualified oilfield injection water at last.
As shown in Figure 2, pH value conditioning agent and coagulating agent in the embodiment shown in Figure 1 also can mix earlier mutually, under condition of stirring, mixed solution are joined in the sewage in the reactor of sewage running piping or sewage process then.
Above-mentioned used pH value conditioning agent can be selected one or more the mixture in hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, industrial waste salt acid, the industrial waste sulfuric acid for use.
Above-mentioned used coagulating agent is one or more the mixture in polymerize aluminum chloride, polyaluminium sulfate, PAFS, poly-silicon aluminum chloride, polymeric aluminum sulfate silicate, aluminum chloride, potassium aluminium sulfate, sodium aluminate, exsiccated ammonium alum, Tai-Ace S 150, magnesium chloride, the calcium chloride.
Positively charged ion, nonionic and the anionic high molecular polymer of the molecular weight that above-mentioned used organic floculant is polyacrylamide or modified starch series more than 5,000,000.
Sewage quality: oleaginousness 200-1000mgL before handling -1Suspended solids content 100-900mgL -1Polyacrylamide 120-300mgL -1, tensio-active agent 10-100mgL -1, alkali 800-2000mgL -1, pH value 9.4.
Handle back effluent quality: oleaginousness≤10mgL -1Suspended solids content≤10mgL -1PH6-9; Polyacrylamide does not detect; Colourity, water white transparency.

Claims (7)

1. process for the treatment of ternary combination flooding sewage, its concrete steps are: produced fluids during asp-flooding is handled: 1. add 1000-6000mgL in sewage after handling through oily water separation more successively according to the following steps -1PH value conditioning agent is regulated sewage pH value between 5.0-7.5; 2. in sewage, add 500-5000mgL -1Coagulating agent; 3. in sewage, add 100-1000mgL -1Organic floculant; 4. sewage is carried out standing sedimentation, from sewage, isolate the flco that abovementioned steps adds described coagulating agent and the generation of described organic floculant afterreaction; 5. sewage is sent into known filtration unit and filtered, and obtain qualified oilfield injection water at last; 3. 2. 1. above-mentioned steps be to carry out under the state that stirs all the time, and guarantee the pH value conditioning agent, coagulating agent, organic floculant and the sewage thorough mixing that are added.
2. process for the treatment of ternary combination flooding sewage as claimed in claim 1 is characterized in that, 3. 2. 1. above-mentioned steps directly carried out in sewage running piping or carried out in the reactor of sewage process respectively respectively.
3. process for the treatment of ternary combination flooding sewage as claimed in claim 1 is characterized in that 4. above-mentioned steps carries out in slurry tank.
4. process for the treatment of ternary combination flooding sewage as claimed in claim 1 is characterized in that, the pH value conditioning agent of above-mentioned steps in 1. and the step coagulating agent in 2. mixes earlier mutually, and then mixed solution is joined in the sewage, after continue subsequent processing steps again.
5. process for the treatment of ternary combination flooding sewage as claimed in claim 1 is characterized in that, described pH value conditioning agent is one or more the mixture in hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, industrial waste salt acid, the industrial waste sulfuric acid.
6. process for the treatment of ternary combination flooding sewage as claimed in claim 1, it is characterized in that described coagulating agent is one or more the mixture in polymerize aluminum chloride, polyaluminium sulfate, PAFS, poly-silicon aluminum chloride, polymeric aluminum sulfate silicate, aluminum chloride, potassium aluminium sulfate, sodium aluminate, exsiccated ammonium alum, Tai-Ace S 150, magnesium chloride, the calcium chloride.
7. process for the treatment of ternary combination flooding sewage as claimed in claim 1 is characterized in that, described organic floculant is positively charged ion, nonionic and the anionic high molecular polymer of molecular weight more than 5,000,000 of polyacrylamide or modified starch series.
CNB2007101180938A 2007-06-28 2007-06-28 Process for the treatment of ternary combination flooding sewage Active CN100554191C (en)

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Application Number Priority Date Filing Date Title
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CN100554191C CN100554191C (en) 2009-10-28

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101698526B (en) * 2009-04-07 2011-08-03 甘肃宇辰化工器材装备有限公司 Emulsified waste water treatment agent and using method thereof
CN102351346A (en) * 2011-08-30 2012-02-15 北京恩瑞达科技有限公司 Method for treating oil field sewage
CN102963967A (en) * 2012-09-02 2013-03-13 栾川县秦豫科技有限公司 Molybdenum dressing tailing slurry treatment agent and preparation method thereof
CN103387274A (en) * 2013-08-08 2013-11-13 甘肃宇辰化工器材装备有限公司 Sulfide-bearing wastewater treating agent and preparation method and use method thereof
CN104828921A (en) * 2015-05-23 2015-08-12 张家港市鸿嘉数字科技有限公司 Muddy water purifying agent
CN104909416A (en) * 2015-06-26 2015-09-16 甘肃金雨环保科技有限公司 Atmospheric-vacuum Sanding wastewater treatment agent, and preparation method and application method thereof
CN104944629A (en) * 2015-05-26 2015-09-30 山东大学 Method for treating water-soluble polymer containing wastewater
CN109368847A (en) * 2018-10-31 2019-02-22 西安美恩环保科技有限公司 A kind of composite flocculation agent and preparation method thereof
CN110709489A (en) * 2017-06-13 2020-01-17 西门子能源公司 Use of composite media for treating produced water from chemically enhanced oil recovery

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101698526B (en) * 2009-04-07 2011-08-03 甘肃宇辰化工器材装备有限公司 Emulsified waste water treatment agent and using method thereof
CN102351346A (en) * 2011-08-30 2012-02-15 北京恩瑞达科技有限公司 Method for treating oil field sewage
CN102963967A (en) * 2012-09-02 2013-03-13 栾川县秦豫科技有限公司 Molybdenum dressing tailing slurry treatment agent and preparation method thereof
CN103387274A (en) * 2013-08-08 2013-11-13 甘肃宇辰化工器材装备有限公司 Sulfide-bearing wastewater treating agent and preparation method and use method thereof
CN103387274B (en) * 2013-08-08 2015-02-18 甘肃宇辰化工器材装备有限公司 Preparation method of sulfide-bearing wastewater treating agent
CN104828921A (en) * 2015-05-23 2015-08-12 张家港市鸿嘉数字科技有限公司 Muddy water purifying agent
CN104944629A (en) * 2015-05-26 2015-09-30 山东大学 Method for treating water-soluble polymer containing wastewater
CN104909416A (en) * 2015-06-26 2015-09-16 甘肃金雨环保科技有限公司 Atmospheric-vacuum Sanding wastewater treatment agent, and preparation method and application method thereof
CN104909416B (en) * 2015-06-26 2017-06-30 甘肃金雨环保科技有限公司 The top of a kind of Atmospheric vacuum three waste water treating agent and preparation method thereof and application method
CN110709489A (en) * 2017-06-13 2020-01-17 西门子能源公司 Use of composite media for treating produced water from chemically enhanced oil recovery
CN109368847A (en) * 2018-10-31 2019-02-22 西安美恩环保科技有限公司 A kind of composite flocculation agent and preparation method thereof

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Effective date of registration: 20160302

Address after: 163316 No. 28 Xinfa street, hi tech Development Zone, Heilongjiang, Daqing

Patentee after: Daqing Dafeng Energy Technology Service Co., Ltd.

Address before: 100085, road, Zhongguancun, Haidian District science and Technology Park, Haidian Park Business Service Center, 5, Beijing

Patentee before: Beijing Hai'enrunde Chemical Sci-Tech Co., Ltd.

Patentee before: Dafeng Oil Field Tech Co., Ltd., Daqing

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Effective date of registration: 20170822

Address after: 163316 No. 28-4 Xinfa street, Daqing Development Zone, Heilongjiang, China

Patentee after: Daqing demeitel Technology Co., Ltd.

Address before: 163316 No. 28 Xinfa street, hi tech Development Zone, Heilongjiang, Daqing

Patentee before: Daqing Dafeng Energy Technology Service Co., Ltd.