CN201737754U - Oil-field reinjection water antiscaling treatment device - Google Patents
Oil-field reinjection water antiscaling treatment device Download PDFInfo
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- CN201737754U CN201737754U CN2010202499238U CN201020249923U CN201737754U CN 201737754 U CN201737754 U CN 201737754U CN 2010202499238 U CN2010202499238 U CN 2010202499238U CN 201020249923 U CN201020249923 U CN 201020249923U CN 201737754 U CN201737754 U CN 201737754U
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Abstract
The utility model relates to an oil-field reinjection water antiscaling treatment device and is applied to oil-field reinjection water treatment. A colloid separation film is fixed in an electrochemical reactor. The inside of the electrochemical reactor is divided into an anode zone and a cathode zone. An anode plate and a cathode plate are respectively connected with both poles of a stabilized voltage supply. The anode zone of the electrochemical reactor is provided with a water inlet. The water inlet is connected with a water pump. The top parts of the anode zone and the cathode zone of the electrochemical reactor are respectively provided with gas outlets. A CO2 inlet is fixed on the wall of the lower part of the cathode zone of the electrochemical reactor. A water outlet of the cathode zone of the electrochemical reactor is provided with a pipeline which is connected with an inlet of a sedimentation tank. The oil-field reinjection water antiscaling treatment device obviously reduces the total hardness of water quality, fundamentally solves the problem of scale formation of the inner wall of the pipeline, obviously reduces the content of C1- and SRB bacterial population, reduces corrosion of C1- and SRB bacteria to pipe workpieces, reduces burden of subsequent water treatment of an oil field, does not need to be added with a chemical agent, is convenient to operate and control and is easy for popularization and application.
Description
Technical field
The utility model relates to oil field produced water-treatment technology field, the device that the re-injection water after particularly the field joint stations oil gas water three phase is separated is handled.
Background technology
Begin to go into operation the whole process that oil-field development finishes from opening hydrocarbon zone, the fluid in the oil reservoir flows out from hydrocarbon zone, through pit shaft, well head to surface gathering system.At the position of these various flows warps, the balance of temperature, pressure, Oil, Water, Gas is all changing.Also need to introduce new fluid in the water flooding recovery.As long as run into that the two or more water that are incompatible exist in the fluid or in flow process along with the variation of pressure and temperature, all exist the possibility of fouling.In the ordinary course of things, under the condition that in the whole oilfield exploitation procedure, raise in temperature often, pressure descends, form calcium carbonate scale easily, and mostly occur in down-hole pressure drop district and the heat position and the separator position of oil field surface gathering system; Simultaneously form sulfate scale easily when two kinds of profits of 5 of mismatching mix, modal is the surface gathering and transferring pipeline; In waterflooding oil field, when injecting water and incompatible local water and meet, then might in the stratum, produce sulfate scale.Because the influence of fouling, well wellbore, surface pipeline choked flow and structure deteriorate, oil field production capacity and water-injection capability reduce or can not continuous production, and then cause oil and gas production to reduce, a large amount of borehole operation workloads have been increased simultaneously, many oil gas wells in some oil fields are stopped production or scrap too early, caused great financial loss.
At present, field use comparatively widely preventing fouling be divided into chemical process, physical method and processing method.The chemical process antiscale is to stop inorganic salt crystalline deposit on solution and fluidic channel walls, and main means are to add the chemical scale inhibition agent; The physical method antiscale is to stop inorganic salt to be deposited on the system wall, allows inorganic salt to form nucleus even crystallization in solution, but requires this crystallization to be suspended on the wall of the system that can not adhere in the solution, and main means have the antiscale of the ultrasonic wave of employing, magnetic scale control; Process mainly is to improve and optimize at the gathering and transportation technology parameter.Most widely used in three kinds of preventing foulings with the chemical process of adding scale inhibitor.
The staff also finds in the oil recovery production practice, although chemical scale inhibition and physics method preventing fouling have played very big effect aspect de-plugging, but fail to remove into dirty metal ion (this is the root of field produces gathering system and industrial cycle water system scale problems), make pipeline after long-time the use, still comparatively general scale formation can occur, had a strong impact on oil-production efficiency and output, and adding also of chemical scale inhibition agent may form secondary pollution.Therefore, according to the principle of " relying mainly on prevention ", the metal ion of removing in the oil field mining liquid (is mainly Ca
2+, Mg
2+Ion) is the key that solves the gathering system scale problems.
The utility model content
The purpose of this utility model is: a kind of oil field reinjection water scale control treatments device is provided, to re-injection water in the injection electrolysis that works of advancing, utilize Ca2+, Mg2+ ion in the OH-ion precipitation water that the reactor cathodic area produces, reach the purpose of water demineralization, fundamentally alleviate the scale problems of field produces gathering system.
The technical solution adopted in the utility model is: oil field reinjection water scale control treatments device comprises water pump, electrochemical reactor, voltage stabilized source, colloid separatory membrane and settling tank.At the electrochemical reactor internal fixing colloid separatory membrane is arranged, the colloid separatory membrane is fixed with positive plate with being divided into positive column and cathodic area in the electrochemical reactor in the positive column, is fixed with negative plate in the cathodic area, and positive plate is connected with voltage stabilized source the two poles of the earth respectively with negative plate.Be fixed with water-in on the wall of the positive column of electrochemical reactor, water-in connects water pump, can the re-injection water that needs are handled be pumped in the positive column of electrochemical reactor.Pneumatic outlet is arranged at the top, positive column at electrochemical reactor, can make the Cl that produces in the reflection
2Discharge.Pneumatic outlet is arranged at the top, cathodic area at electrochemical reactor, can make the H that produces in the reflection
2Discharge.On the wall of the cathodic area of electrochemical reactor, be fixed with water outlet, on the lower part wall of the cathodic area of electrochemical reactor, be fixed with CO
2Gas feed can be injected CO
2The pH value of gas regulation tax.Be fixed with water out on the top wall of the cathodic area of electrochemical reactor, water out has pipeline to connect the inlet of settling tank.Settling tank has water out, can make water treated, post precipitation send into water injection tank.
Electrochemical reactor positive column top Cl
2Pneumatic outlet is connected with Cl
2Gas collector; Top, the cathodic area H of electrochemical reactor
2Pneumatic outlet is connected with H
2Gas collector.
The positive plate material is titanium-based metal oxide electrode (PbO
2), negative plate is a stainless steel.
The colloid separatory membrane is the ceramic chips of band micropore, is used for stopping anode diffusion and then dissolvings again such as suspended substance that negative electrode in the reaction process generates, colloid.
Distance between positive plate and the negative plate is 7.5cm, and applying voltage between pole plate is 8V, and current density is 16mA/cm
2, water residence time in electrochemical reactor is 90～100min.
Consult Fig. 1.The water outlet of joint station three phase separation is injected electrochemical reactor 2 water-ins by water pump 1 after filtration in the oilfield transportation system; When arriving electrochemical reactor 2 inner heights 2/3 place, liquid level begins the electrolysis of switching on, as producing H in the electrochemical reactor 2
2And Cl
2, enter gas collector respectively.Monitoring electrochemical reactor 2 cathodic area pH values during the electrolysis, and by regulating CO
2CO is advanced in gas feed
2Gas flow, control pH value is about 8.5.(after 90～100min), the water outlet of handling enters settling tank 5, and the suspended matter in the water is exploited by water outlet discharge carrying out re-injection after sedimentation in certain residence time of process.
The principle of work of oil field reinjection water scale control treatments device: 1. electrolysis: between the reactor two-plate, apply the low dc voltage electric field, then in the reaction of the interface of negative electrode and water generating electrodes, shown in reaction (1).Utilize cathodic area high OH-concentration deposit C a
2+, Mg
2+Ion shown in reaction (2), (3), (4), reaches and removes the purpose that becomes dirty metal ion in the water, simultaneously owing to Cl in the recovered water
-Content is high, the Cl that the positive column produces
2Be partially soluble in water and play germicidal action, shown in reaction (5), (6).
2H
2O+2e→2OH
-+H
2↑ (1)
HCO
3 2-+OH
-→H
2O+CO
3 2- (2)
Mg
2++2OH
-→Mg(OH)
2↓ (3)
Ca
2++CO
3 2-→CaCO
3↓ (4)
2Cl
--2e→Cl
2↑ (5)
Cl
2+H
2O→HCl+HclO (6)
2. logical CO
2Gas regulation: because of reactor design is by the cathodic area water outlet, water outlet pH value will be aggravated the scaling tendency of re-injection water as direct injection stratum about 9; And Ca
2+Removal mainly be to pass through OH
-With HCO
3 -In conjunction with generating CaCO
3Due to the precipitation, and HCO in the former water
3 -Compare and Ca
2+Content very low (≤20mmol/L), so the utility model design feeds CO in the cathodic area
2Gas plays regulating effect on the one hand and prevents that pH is too high, has increased the CO in the water on the other hand
3 2-Concentration has improved Ca
2+Clearance.
3. precipitate: the reactor water outlet enters settling tank, and supernatant liquor is discharged by the settling tank top, and drainage water is used for oil field re-injection exploitation, and calcium ions and magnesium ions, bacterium (being mainly sulphate reducing bacteria SRB) and COD concentration are all effectively removed.
The beneficial effects of the utility model: the utility model oil field reinjection water scale control treatments device,
1) handles through electrochemical reactor, the total hardness of re-injection water (total concn of calcium, magnesium ion) clearance is about 65%, compare with the scale inhibitor means that add commonly used on the present oil field, the utility model is not to make into dirty metal ion to be stabilized in the gathering system, but a large amount of incrustation ions are removed, can play more persistent anti-scaling action.
2) reactor anodic well-oxygenated environment makes the chemical oxygen demand (COD) of water outlet and total plate count all have an appointment 70% reduction and Cl
-Consumption alleviated its stress corrosion to tubing, this has reduced the dosage of medicament such as inhibiter, sterilant in the subsequent disposal to a great extent, has saved processing cost.
3) structure of reactor is simple, and treatment effect is obvious, need not add chemical agent, and non-secondary pollution is convenient to promote.
Description of drawings
Fig. 1 is the device synoptic diagram that the utility model oil field reinjection water scale control treatments device adopts.
Among the figure, 1. water pump, 2. electrochemical reactor, 3. voltage stabilized source, 4. colloid separatory membrane, 5. settling tank.
Embodiment
Oil field reinjection water scale control treatments device comprises water pump 1, electrochemical reactor 2, voltage stabilized source 3, colloid separatory membrane 4 and settling tank 5.The middle part is fixed with a colloid separatory membrane 4 in electrochemical reactor 2, and colloid separatory membrane 4 is ceramic chips of band micropore.Colloid separatory membrane 4 is fixed with positive plate with being divided into positive column and cathodic area in the electrochemical reactor 2 in the positive column, and the positive plate material is titanium-based metal oxide electrode (PbO
2).Be fixed with negative plate in the cathodic area, negative plate is stainless steel (model is 304).Positive plate is connected with voltage stabilized source 3 the two poles of the earth respectively with negative plate; Distance between positive plate and the negative plate is 7.5cm.Be fixed with water-in on the wall of the positive column of electrochemical reactor 2, water-in connects water pump 1; Pneumatic outlet is arranged at the top, positive column at electrochemical reactor 2, and pneumatic outlet is connected with Cl
2Gas collector.Pneumatic outlet is arranged at the top, cathodic area at electrochemical reactor 2, and pneumatic outlet is connected with H
2Gas collector.On the wall of the cathodic area of electrochemical reactor 2, be fixed with water outlet, on the lower part wall of the cathodic area of electrochemical reactor 2, be fixed with CO
2Gas feed is fixed with water out on the top wall of the cathodic area of electrochemical reactor 2, water out has pipeline to connect the inlet of settling tank 5; Settling tank 5 has water out.
Treatment effect such as table 1 can be removed the calcium ions and magnesium ions of a large amount of one-tenth dirts, and reduce Cl
-And sulphate reducing bacteria (SRB) these quicken the content of pipeline inner wall corrosion materials, play anticorrosion and effect is had both in antiscale.
Table 1
Claims (5)
1. oil field reinjection water scale control treatments device, comprise water pump (1), electrochemical reactor (2), voltage stabilized source (3), colloid separatory membrane (4) and settling tank (5), at electrochemical reactor (2) internal fixing colloid separatory membrane (4) is arranged, colloid separatory membrane (4) will be divided into positive column and cathodic area in the electrochemical reactor (2), be fixed with positive plate in the positive column, be fixed with negative plate in the cathodic area, positive plate is connected with voltage stabilized source (3) the two poles of the earth respectively with negative plate; Be fixed with water-in on the positive column wall of electrochemical reactor (2), water-in connects water pump (1); Pneumatic outlet is arranged at the top, positive column at electrochemical reactor (2), at the top, cathodic area of electrochemical reactor (2) pneumatic outlet is arranged; On the cathodic area wall of electrochemical reactor (2), be fixed with water outlet, on the cathodic area lower part wall of electrochemical reactor (2), be fixed with CO
2Gas feed is fixed with water out on the cathodic area top wall of electrochemical reactor (2), water out has pipeline to connect the inlet of settling tank (5); Settling tank (5) has water out.
2. oil field reinjection water scale control treatments device as claimed in claim 1 is characterized in that: electrochemical reactor (2) top, positive column Cl
2Pneumatic outlet is connected with Cl
2Gas collector; Top, the cathodic area H of electrochemical reactor (2)
2Pneumatic outlet is connected with H
2Gas collector.
3. oil field reinjection water scale control treatments device as claimed in claim 1 is characterized in that: the positive plate material is the titanium-based metal oxide electrode, and negative plate is a stainless steel.
4. oil field reinjection water scale control treatments device as claimed in claim 1 is characterized in that: described colloid separatory membrane (4) is the ceramic chips of band micropore.
5. as claim 1,2,3 or 4 described oil field reinjection water scale control treatments devices, it is characterized in that: the distance between described positive plate and the negative plate is 7.5cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202499238U CN201737754U (en) | 2010-06-25 | 2010-06-25 | Oil-field reinjection water antiscaling treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202499238U CN201737754U (en) | 2010-06-25 | 2010-06-25 | Oil-field reinjection water antiscaling treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201737754U true CN201737754U (en) | 2011-02-09 |
Family
ID=43553036
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|---|---|---|---|
| CN2010202499238U Expired - Lifetime CN201737754U (en) | 2010-06-25 | 2010-06-25 | Oil-field reinjection water antiscaling treatment device |
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|---|---|
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103112965A (en) * | 2013-02-22 | 2013-05-22 | 延长油田股份有限公司 | Multi-layer water mixing and injection descaling device |
| CN104343427A (en) * | 2013-07-24 | 2015-02-11 | 中国石油化工股份有限公司 | Method for predicating CO2 drive oil deposit inorganic scaling trend |
| CN105502690A (en) * | 2015-12-10 | 2016-04-20 | 北京津工海水科技有限公司 | Electro-adsorption hardness removal device and circulating cooling water processing system and method |
| CN105793199A (en) * | 2013-11-01 | 2016-07-20 | 新水处理工艺株式会社 | High-efficiency electrolysis ballast water treatment apparatus and treatment method using carbon dioxide |
| CN107244772A (en) * | 2017-05-03 | 2017-10-13 | 浙江大学 | Air washes away the electrochemical softening of water method and system of detergency |
| CN107879488A (en) * | 2017-11-17 | 2018-04-06 | 浙江大学 | The electrochemical softening of water method and apparatus that electric current alternately changes |
| CN108217856A (en) * | 2018-01-30 | 2018-06-29 | 武汉工程大学 | A kind of electro-chemical water processing system and its method for treating water |
| CN110054258A (en) * | 2019-05-27 | 2019-07-26 | 中国华能集团清洁能源技术研究院有限公司 | A kind of carbon dioxide aeration electrochemical descaling device and method |
| CN111777198A (en) * | 2020-07-30 | 2020-10-16 | 中国华能集团清洁能源技术研究院有限公司 | Heat supply network water electrochemical treatment system and method utilizing power plant flue gas |
-
2010
- 2010-06-25 CN CN2010202499238U patent/CN201737754U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103112965B (en) * | 2013-02-22 | 2014-07-09 | 延长油田股份有限公司 | Multi-layer water mixing and injection descaling device |
| CN103112965A (en) * | 2013-02-22 | 2013-05-22 | 延长油田股份有限公司 | Multi-layer water mixing and injection descaling device |
| CN104343427A (en) * | 2013-07-24 | 2015-02-11 | 中国石油化工股份有限公司 | Method for predicating CO2 drive oil deposit inorganic scaling trend |
| CN104343427B (en) * | 2013-07-24 | 2016-11-09 | 中国石油化工股份有限公司 | A kind of prediction CO2the method of oil reservoirs inorganic scaling trend |
| CN105793199A (en) * | 2013-11-01 | 2016-07-20 | 新水处理工艺株式会社 | High-efficiency electrolysis ballast water treatment apparatus and treatment method using carbon dioxide |
| CN105502690B (en) * | 2015-12-10 | 2018-06-22 | 北京津工海水科技有限公司 | Electro Sorb removes computer hardware, Water Treatment in Circulating Cooling System and method |
| CN105502690A (en) * | 2015-12-10 | 2016-04-20 | 北京津工海水科技有限公司 | Electro-adsorption hardness removal device and circulating cooling water processing system and method |
| CN107244772A (en) * | 2017-05-03 | 2017-10-13 | 浙江大学 | Air washes away the electrochemical softening of water method and system of detergency |
| CN107879488A (en) * | 2017-11-17 | 2018-04-06 | 浙江大学 | The electrochemical softening of water method and apparatus that electric current alternately changes |
| CN108217856A (en) * | 2018-01-30 | 2018-06-29 | 武汉工程大学 | A kind of electro-chemical water processing system and its method for treating water |
| CN108217856B (en) * | 2018-01-30 | 2024-02-20 | 武汉工程大学 | Electrochemical water treatment system and water treatment method thereof |
| CN110054258A (en) * | 2019-05-27 | 2019-07-26 | 中国华能集团清洁能源技术研究院有限公司 | A kind of carbon dioxide aeration electrochemical descaling device and method |
| CN111777198A (en) * | 2020-07-30 | 2020-10-16 | 中国华能集团清洁能源技术研究院有限公司 | Heat supply network water electrochemical treatment system and method utilizing power plant flue gas |
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Legal Events
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110209 |