CN101935125A - Method for processing alkaline-surfactant-polymer flooding oilfield injection water - Google Patents
Method for processing alkaline-surfactant-polymer flooding oilfield injection water Download PDFInfo
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- CN101935125A CN101935125A CN 201010264692 CN201010264692A CN101935125A CN 101935125 A CN101935125 A CN 101935125A CN 201010264692 CN201010264692 CN 201010264692 CN 201010264692 A CN201010264692 A CN 201010264692A CN 101935125 A CN101935125 A CN 101935125A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000002347 injection Methods 0.000 title claims abstract description 25
- 239000007924 injection Substances 0.000 title claims abstract description 25
- 238000012545 processing Methods 0.000 title abstract description 6
- 229920000642 polymer Polymers 0.000 title abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 5
- 239000010935 stainless steel Substances 0.000 claims abstract description 5
- AMVQGJHFDJVOOB-UHFFFAOYSA-H aluminium sulfate octadecahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O AMVQGJHFDJVOOB-UHFFFAOYSA-H 0.000 claims abstract description 4
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 4
- 239000002131 composite material Substances 0.000 claims description 22
- 239000011206 ternary composite Substances 0.000 claims description 20
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 4
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 3
- 239000011790 ferrous sulphate Substances 0.000 claims description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 12
- 150000001875 compounds Chemical class 0.000 abstract description 6
- 241000894006 Bacteria Species 0.000 abstract description 5
- 239000002351 wastewater Substances 0.000 abstract description 5
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 239000004411 aluminium Substances 0.000 abstract 1
- 238000000151 deposition Methods 0.000 abstract 1
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 27
- 239000003921 oil Substances 0.000 description 27
- 230000016615 flocculation Effects 0.000 description 8
- 238000011084 recovery Methods 0.000 description 8
- 239000006228 supernatant Substances 0.000 description 8
- 238000005189 flocculation Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000003814 drug Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000356 contaminant Substances 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 239000013543 active substance Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- -1 alkylbenzene sulfonate Chemical class 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010349 cathodic reaction Methods 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- 241000295146 Gallionellaceae Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- JXLHNMVSKXFWAO-UHFFFAOYSA-N azane;7-fluoro-2,1,3-benzoxadiazole-4-sulfonic acid Chemical compound N.OS(=O)(=O)C1=CC=C(F)C2=NON=C12 JXLHNMVSKXFWAO-UHFFFAOYSA-N 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
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- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
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- 239000000661 sodium alginate Substances 0.000 description 1
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- 229940005550 sodium alginate Drugs 0.000 description 1
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Abstract
The invention discloses a method for processing alkaline-surfactant-polymer (ASP) flooding oilfield injection water, relating to the processing field of oilfield wastewater. The method comprises the following steps: firstly, adjusting the pH value of the ASP flooding oilfield injection water to be 4-6.5, and placing the oilfield injection water the pH value of which is adjusted into a container, putting at least three polar plates into the container, wherein the three polar plates are respectively connected with the positive and negative poles of a regulated DC power supply; adjusting the current intensity of the regulated DC power supply to be 3-10A; processing for 10-15min, wherein the utilized polar plates are aluminum polar plates or stainless steel polar plates; adjusting the pH value of the processed effluent to be 7.5-9.5; and adding the compound water treatment agent in mass ratio of 0.2-1g/L, stirring, and carrying out steady depositing for 1h, wherein the utilized compound water treatment agent is a water treatment agent which is obtained by respectively mixing kieselguhr with aluminium polychlorid, green vitriol, aluminium sulfate octadecahydrate or PAFS in the mass ratio of 6:1-9:1. The method of the invention can efficiently remove oil content, COD, SS, harmful bacteria and other pollutants in the ASP flooding oilfield injection water, and has the advantages of simple and convenient technology and low cost.
Description
Technical field
The present invention relates to the process field of oil field waste, is the treatment process of a kind of ternary composite driving oil field re-injection water.
Background technology
The mining type of displacement of reservoir oil by filling water is all adopted in China main force oil fields such as Daqing oil field, Shengli Oil Field and Liaohe Oil Field, after binary is driven the water flood recovery technology, China adopts the alkaline surfactant polymer flooding oil-field technology in the oil field mostly at present, promptly the ternary composite driving of being made up of alkali/tensio-active agent/polymkeric substance carries out water flood recovery, is called for short ternary composite driving water flood recovery technology.Employed alkali mainly contains NaOH, Na
2CO
3, NaHCO
3, Na
3PO
4, Na
4SiO
4, and Na
4SiO
3Deng; Tensio-active agent mainly contains sulfonated petro-leum, alkylbenzene sulfonate, petroleum carboxylate, a-alkenyl sulphonate, polyethenoxy ether sulphonate, the carboxylate salt that contains cyclic ethers, MICROBIAL SURFACTANT and Soxylat A 25-7 type nonionogenic tenside etc.; Polymkeric substance mainly contains hydro-polyacrylamide, xanthocyte gum, sodium alginate and cellulosic cpd (comprising shuttle methylcellulose gum CMC and light ethyl cellulose HEC) four big classes.At present, the output of China's ternary composite driving water flood recovery accounts for 70% of whole oil production rate, and in ternary composite driving water flood recovery process, water-oil ratio is 9: 1, and 1 ton of crude oil of promptly every extraction will produce 9 tons waste water.Therefore, alkaline surfactant polymer flooding oil-field wastewater is handled, the reuse after up to standard seems extremely important.The re-injection water of ternary compound oil drive oil recovery institute association contains a large amount of suspended solidss, organism, salinity height; And contain a large amount of alkali, tensio-active agent and polymkeric substance, increased intractability.If deal with improperly, fail to reach the re-injection standard, in re-injection process, can fouling stop up stratum, corrosion pipeline, also can accelerate microbial reproduction, oil reservoir is damaged, reduce the recovery ratio of oil.Efflux then and can cause bigger environmental pollution.
The reuse compliance rate of China's ternary compound oil drive re-injection water is lower at present, its major cause is, the ternary composite driving waste water reinjection treatment technology that adopt in most of oil field, basically continued to use secondary water flood recovery stage waste water treatment process technical scheme, remove suspended substance based on filtration workshop sections such as flotation and gravity settling classification oil removing, sand filtrations, handled ternary composite driving waste water can't reach the standard-required of oil field reinjection water.Also there were a lot of novel techniques to occur in recent years, and carried out the related experiment of ternary composite driving wastewater treatment, and relevant patent report (CN 101125717A, CN101659482A) is arranged.But because the new technology, the novel process that are adopted, in wastewater treatment process, all add a large amount of medicaments, and it is in the majority with organic medicament, as flocculation agent, emulsion splitter, dispersion agent, dewatering agent etc., caused increasing considerably of processing costs, handle running cost mostly at 16～20 yuan/ton, reach 28 yuan/ton individually, increased the economical load in oil field greatly; Because the adding of a large amount of organic medicaments has increased sewage sludge viscosity, make the mud intractable, thereby caused " secondary pollution " simultaneously.And, cause the less stable of operation owing to the complexity of technology.Therefore, research serves as to handle medicament with inorganic natural micro porous material, in the permeability that has solved mud, constrictive while, has reduced secondary pollution, utilizes the conversion characteristic of natural micropore to improve effluent quality, and can significantly reduce medicament expense and use; And explore the multiple displacing oil-field re-injection water technology of the limpid short flow process ternary of effluent quality, handled re-injection water problem not up to standard to solve existing Technology, and method actual motion cost provided by the present invention can be controlled in 6-8 unit/ton.
Summary of the invention:
Technical problem at existing ternary composite driving re-injection water treatment the invention provides a kind of method that can effectively remove pollution substances such as oil content, COD, SS and unwanted bacteria in the ternary composite driving re-injection water, and the easy cost of technology low, be easy to industrialization.
The invention provides a kind of method of handling ternary composite driving oil field re-injection water, it is characterized in that: regulate ternary composite driving oil field re-injection water pH value earlier between the 4-6.5, oil field reinjection water after the adjusting pH value is put into container, put at least three pole plates in described container, three pole plates connect the positive and negative electrode of constant voltage dc source respectively; The strength of current of regulating constant voltage dc source is handled 10-15min to 3-10A, and employed pole plate is aluminum substrate or stainless steel polar plate; Handling the back water outlet and regulate pH between the 7.5-9.5, is that 0.2-1g/L adds composite water disposal agent by mass ratio then, stirs, behind the standing sedimentation 1h; Use therein composite water disposal agent is that diatomite is 6 with polymerize aluminum chloride, ferrous sulfate, Patent alum or PAFS by mass ratio respectively: 1-9: 1 composite water conditioner.
The present invention be coupled absorption, the flocculation treatment technology of electrochemical techniques and micropore composite water disposal agent.Electrochemical techniques are to be condition with the high voltage low current, utilize electrochemical principle, produce electrochemical reaction by the applying high voltage effect, electric energy is converted into chemical energy, organic or inorganic pollutent in the ternary composite driving re-injection water is carried out oxidation and reductive action, produce cohesion, the air supporting effect of micron disperse bubble and follow-up flocculation sediment effect, pollutent is separated from water body, can remove the various noxious pollutants such as COD, heavy metal, SS, oil, polymkeric substance, salt and bacterium in the re-injection water effectively.Because electrolytic action, adopt in the water in the soluble contaminants removing the ternary composite driving oil field, and effective kill harmful bacterium, as SRB bacterium, iron bacteria, saprophytic microorganism etc., make these mushroom content reach re-injection water water quality requirement.Its main reaction principle is as follows:
Electrochemical techniques be with treatment sewage as electrolyte solution, the positive charge side is carried out anodic reaction, the negative charge side is carried out cathodic reaction.With ferroelectric very routine:
Anodic reaction: Fe-2e → Fe
2+
Fe
2++2OH
-→Fe(OH)
2
4Fe(OH)
2+O
2+2H
2O→4Fe(OH)
3↓
Iron ion enters becomes the flocculation center in the water, by in and multiple compound action removal pollutents such as the electric charge of particulate, electrochemical reaction, electrochemistry precipitation, absorption.
Cathodic reaction: 2H
++ 2e → H
2↑
The hydrogen of overflowing forms minimum bubble, with the floating surface of going up sewage of condensation product, removes thereby separate.
And there is reversibility in the water outlet after the electrochemical techniques processing, but under the effect of micropore composite water disposal agent, can impel flocculation irreversible, and can effectively remove the pollutent in the water, and effluent quality is as clear as crystal.
The micropore composite water disposal agent, be by diatomite with natural micropore structure through the compound and preparation of modification, and this medicine is pure inorganic materials.This micropore composite water disposal agent, its housing has the micropore of a large amount of ordered arrangement, therefore have characteristics such as porosity is big, specific surface area is big, adsorptivity is strong, as sewage-treating agent, have following characteristics: 1, charge neutrality effect: the uneven current potential on surface, in sewage, can neutralize with charged contaminants, break original balance electric field, weaken the repulsion between charged contaminants, impel the combination between the charged contaminants in the water, and,, separate with water body by gravity settling attached to the poromerics surface.2, throwing out: can more promptly catch pollutent in the sewage water body, be core with the micropore sewage-treating agent, forms firm flocculation group, and flocculation group separates with water body from sedimentation.3, adsorption cleaning effect: the characterization of adsorption of itself, can be adsorbed onto the diatomite surface to flocculation group, mushroom, virus and the fine particle in the water body, form bigger chain type or group's formula structure, by gravity settling separation.
Method actual motion cost provided by the present invention can be controlled in 6-8 unit/ton.
Embodiment:
The electrochemical techniques treatment facility is a constant voltage dc source, power unit company limited of Guangzhou postal section, model YK-AD6025.
In the invention process the sewage that uses be the water outlet of Daqing oil field ternary composite driving re-injection water treatment station.Ternary composite driving re-injection water raw water quality index is shown in table 1-1.
Table 1-1 raw water quality index
The raw water quality index table specific as follows 1-2 that following examples is handled, but be not limited to table 1-2.
Table 1-2 raw water quality index
Embodiment 1
Get 1L ternary composite driving re-injection water and place beaker, regulate pH to 4 by sodium hydroxide, adjusting strength of current is 10A, pole plates used is stainless steel polar plate, electrochemical treatment 10min, water outlet is regulated pH to 8.5 by sodium hydroxide, leave standstill and get supernatant liquor 200mL half an hour, the dosage of micropore composite water disposal agent is 1g/L, used micropore composite water disposal agent be diatomite and polymerize aluminum chloride with the composite treatment agent of 6: 1 mass ratio, stir 2-3min fast after adding treatment agent, leave standstill 1h, get supernatant liquor and carry out numerical evaluation, experimental result is as shown in table 1.
Table 2 effluent quality table
Embodiment 2:
Adopt the method for embodiment 1, regulate pH to 5.5 by sodium hydroxide, adjusting strength of current is 3A, pole plates used is stainless steel plate, electrochemical treatment 15min, water outlet is regulated pH to 9 by sodium hydroxide, leave standstill and get supernatant liquor 200mL half an hour, the dosage of micropore composite water disposal agent is 0.2g/L, used micropore composite water disposal agent be diatomite and ferrous sulfate with the composite treatment agent of 9: 1 mass ratio, stir 2-3min fast after adding treatment agent, leave standstill 1h, get supernatant liquor and carry out numerical evaluation, experimental result is as shown in table 2.
Table 3 effluent quality table
Embodiment 3:
Adopt the method for embodiment 1, regulate pH to 6.5 by sodium hydroxide, adjusting strength of current is 7A, pole plates used is aluminum substrate, electrochemical treatment 12min, water outlet is regulated pH to 8 by sodium hydroxide, leave standstill and get supernatant liquor 200mL half an hour, the dosage of micropore composite water disposal agent is 0.5g/L, used micropore composite water disposal agent be diatomite and Patent alum with the composite treatment agent of 8: 1 mass ratio, stir 2-3min fast after adding treatment agent, leave standstill 1h, get supernatant liquor and carry out numerical evaluation, experimental result is as shown in table 3.
Table 4 effluent quality table
Embodiment 4:
Adopt the method for embodiment 1, regulate pH to 5 by sodium hydroxide, adjusting strength of current is 5A, pole plates used is aluminum substrate, electrochemical treatment 13min, water outlet is regulated pH to 8 by sodium hydroxide, leave standstill and get supernatant liquor 200mL half an hour, the dosage of micropore composite water disposal agent is 0.8g/L, used micropore composite water disposal agent be through diatomite and PAFS with the composite treatment agent of 7: 1 mass ratio, stir 2-3min fast after adding treatment agent, leave standstill 1h, get supernatant liquor and carry out numerical evaluation, experimental result is as shown in table 4.
Table 5 effluent quality table
Claims (1)
1. handle the method for ternary composite driving oil field re-injection water, it is characterized in that: regulate ternary composite driving oil field re-injection water pH value earlier between the 4-6.5, oil field reinjection water after the adjusting pH value is put into container, put at least three pole plates in described container, three pole plates connect the positive and negative electrode of constant voltage dc source respectively; The strength of current of regulating constant voltage dc source is handled 10-15min to 3-10A, and employed pole plate is aluminum substrate or stainless steel polar plate; Handling the back water outlet and regulate pH between the 7.5-9.5, is that 0.2-1.0g/L adds composite water disposal agent by mass ratio then, stirs, behind the standing sedimentation 1h; Use therein composite water disposal agent is that diatomite is 6 with polymerize aluminum chloride, ferrous sulfate, Patent alum or PAFS by mass ratio respectively: 1-9: 1 composite water conditioner.
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|---|---|---|---|
| CN 201010264692 CN101935125A (en) | 2010-08-27 | 2010-08-27 | Method for processing alkaline-surfactant-polymer flooding oilfield injection water |
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|---|---|---|---|
| CN 201010264692 CN101935125A (en) | 2010-08-27 | 2010-08-27 | Method for processing alkaline-surfactant-polymer flooding oilfield injection water |
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| CN102351353A (en) * | 2011-08-29 | 2012-02-15 | 浙江海拓环境技术有限公司 | Method for pre-treating inverted trough water of electroplating pre-treatment |
| CN102774897A (en) * | 2012-04-23 | 2012-11-14 | 克拉玛依市三达新技术开发有限责任公司 | Treatment method of polymer flooding and binary combination flooding-SP-sewage |
| CN105130011A (en) * | 2015-09-07 | 2015-12-09 | 深圳市德庆科技有限公司 | Diatomite sewage treating agent, preparation method and technology application thereof |
| CN105253988A (en) * | 2015-10-16 | 2016-01-20 | 巢湖市聚源机械有限公司 | Fermentation treatment agent for treatment of weaving and dyeing sewage |
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