CN101905936A - Method for treating oil field produced water and treatment flow thereof - Google Patents
Method for treating oil field produced water and treatment flow thereof Download PDFInfo
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- CN101905936A CN101905936A CN2009100160207A CN200910016020A CN101905936A CN 101905936 A CN101905936 A CN 101905936A CN 2009100160207 A CN2009100160207 A CN 2009100160207A CN 200910016020 A CN200910016020 A CN 200910016020A CN 101905936 A CN101905936 A CN 101905936A
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Abstract
The invention discloses a method for treating oil field produced water in the petroleum industry and a treatment flow thereof for treating the oil field produced water and making the produced water meet the re-injection requirement. The treatment method comprises the following steps of: treating the oil field produced water by using a pre-oxidation treatment device, putting an agent between a primary oil removal tank and a secondary settlement tank, filtering the oil field produced water by using a micropore ceramic granular filter material and then delivering the filtered oil field produced water. The primary oil removal tank, the secondary settlement tank, a delivery tank and a delivery pump are adopted in the treatment flow and connected by adopting pipelines; the front end of the primary oil removal tank is connected with the pre-oxidation treatment device; a coagulation reactor is connected between the primary oil removal tank and the secondary settlement tank; and the tail end of the flow is connected with a ceramic filter tank. The treatment method can solve the problems of corrosion and scaling of the oil field produced water so that the water quality of the treated injection water comprehensively and stably reaches the standard. The treatment method generates a small amount of mud, and greatly reduces the subsequent treatment cost.
Description
Technical field
The present invention relates to the treatment process and the treatment scheme thereof of the produced water disposal technology, particularly a kind of oil field extracted water of petroleum industry, be used to handle the recovered water in oil field, make recovered water reach the re-injection requirement.
Background technology
The treatment process of present oil field extracted water has a variety of, because recovered water water quality differs greatly, the treatment scheme kind is more, and is existing at different raw water quality characteristics, purifying treatment requirement, according to main processing technological flow, roughly can be divided into:
(1) gravity type boat davit is received oil+sedimentation+filtration, other auxiliary treatment flow processs such as supporting adding " three is anti-" medicament; Flow process is as follows: water → dosing → primary oil removal tank → secondary settlement jar → outer defeated jar → output pump → walnut shell filter → outer failing come at oily station.
(2) pressure coalescent settlement separate+filtering process, other auxiliary treatment flow processs such as supporting adding " three anti-" medicament: the oil station comes water → dosing → pressure swash plate except that oil tank → secondary settlement jar → defeated jar → output pump → walnut shell filter → fail outward.
(3) flotation formula is removed oil purification+filtering process, other auxiliary treatment flow processs such as supporting then adding " three is anti-" medicament: the oil station comes water → dosing → floatation purification except that oil tank → secondary settlement jar → defeated jar → output pump → walnut shell filter → fail outward.
The treatment process that small-scale application electrochemistry flocculation flow process is arranged recently: i.e. electrochemistry flocculation+filtering process, other auxiliary treatment flow processs such as supporting adding " three is anti-" medicament: water → dosing → electrochemistry flocculation → secondary settlement jar → outer defeated jar → output pump → walnut shell filter → fail is come at the oil station outward.
Above several produced water disposal flow processs under normal circumstances can solve the problem up to standard of local depression system.But the purpose after the produced water disposal is wanted re-injection up to standard, therefore the treatment process of selecting for use will realize that not only low pressure is up to standard, final purpose is to realize the recovered water water quality reaching standard of high pressure water injection system, because above technology is mainly to throw in " three is anti-" medicament and safeguard procedures, fundamentally do not remove instability and the ion that causes corrosion and scaling in the water, therefore can not thoroughly solve the instability and the corrosion and scaling problem of recovered water, cause being difficult to reach the oil field reinjection water water quality standard after the oil field produced water treatment.
Defective mainly shows:
(1) fundamentally do not remove instability and the ion that causes corrosion and scaling in the water, can not solve the purifying problem of recovered water, main water-quality guideline such as oil-containing, suspended substance, corrosion rate exceeds standard in the water, can not reach the oil-field flooding needs;
(2) fouling of waterflood system burn into is serious;
(3) water quality longshore current journey constantly worsens, and has a strong impact on water flooding effect and economic benefit.
Summary of the invention
The treatment process and the treatment scheme thereof that the purpose of this invention is to provide a kind of oil field extracted water realize the stable comprehensively purification of recovered water, guarantee that the produced-water reinjection process stabilization is up to standard; Solve the etching problem of recovered water, make recovered water water quality after the processing can satisfy the needs of oil-field flooding.
Adopt the present technique solution can reach above-mentioned purpose:
A kind of method for treating water cut out from oil field at first uses the pre-oxidation treatment device that oil field extracted water is handled, and medicament delivery is arranged between primary oil removal tank and the secondary settlement jar, and is outer more defeated after filtering through the micropore ceramics granule filter material at last.
Treatment scheme comprises primary oil removal tank, secondary settlement jar, outer defeated jar and output pump, the employing pipeline connects, front end at primary oil removal tank connects the pre-oxidation treatment device, connects coagulation reactor between primary oil removal tank and secondary settlement jar, at the most not end connection ceramic filter jar of flow process.
The present invention compares with existing treatment Technology for Petroleum Water Flooding, treat both principal and secondary aspect of disease for the improvement of oil field extracted water provides, the process matched therewith and the equipment of the comprehensive regulation, has following significant effect: 1, on flow sheet equipment, adopt preoxidation produced water disposal technology, at first use the pre-oxidation treatment device to handle, in being rich in the recovered water of NaCl, feed direct current, make it on cathode and anode and neutral electrode, to take place respectively electrochemical reaction, produce the strong oxidizing property material of intermediate state.In this process, the pH value brought up to and realize under the condition about 7 that the Fe2+ ionic transforms, break CO2-HCO3-CO32-weak acid and weak base buffer system and the H2S-HS-S2-weak acid and weak base buffer system that exists in the recovered water by chemistry and electrochemical action, and colloid equilibrium.2, changed the adding of traditional process " three is anti-" medicament all in the way foremost of flow process, in flow process of the present invention, the dosing part then is placed between primary oil removal tank and the secondary settlement jar according to actual needs, and the pre-oxidation treatment device has been placed on foremost.
3, the present invention has adopted micropore ceramics media filtration technology, and used micropore ceramics granule filter material is compared with other filtrates such as nut-shells, mainly contains three each and every one obvious advantages:
(1) micropore ceramics granule filter material adopts the artificial granulation to form sphere, and what require when more calculating near filtration theory is desirable spherical, makes the very close of media filtration process and filtration theory description, therefore helps control and improves filtration efficiency.
(2) micropore ceramics granule filter material adopts the artificial granulation to be shaped, and can control the porosity of micropore ceramics granule filter material in sintering procedure by adding gasification dosage.Adjust porosity by complete processing, so the adsorptive power of control filtrate, improve its antipollution and dirt penetrating power, so the cleaning and regeneration of filtrate is easier, cleaner thorough.
(3) from filtering and clean two aspects, the micropore ceramics granule filter material had both had walnut shell filtering material filtering velocity height, cut the strong advantage of dirty power, possess characteristics such as quartz sand filter media is corrosion-resistant, intensity height again, thereby, compare with walnut shell filtering material, quartz sand filter media, the micropore ceramics granule filter material is more suitable for oil field produced water filtration.
Current collection Water Treatment technology of the present invention, coagulant precipitation, micropore ceramic filter technology and glass-reinforced plastic material are prepared in one, oil field extracted water is carried out the comprehensive regulation, can receive good regulation effect, fundamentally solve the burn into scale problems of oil field extracted water, the comprehensive stably reaching standard of oilfield injection water water quality after realizing handling.Compare with existing modified water treatment technology, the mud amount of generation is little, and subsequent treatment cost significantly reduces, and has good development benefit and economic benefit.
Following table is the test contrast effect table of the present invention and other produced water disposal technology.
Description of drawings
Accompanying drawing 1 is a process flow diagram of the present invention.
Accompanying drawing 2 is the electron microscope photo scanning of micropore ceramics granule filter material among the present invention.
Embodiment
Below in conjunction with embodiment the present invention is done further detailed description: a kind of method for treating water cut out from oil field, at first use the pre-oxidation treatment device that oil field extracted water is handled, medicament delivery is arranged between primary oil removal tank and the secondary settlement jar, outer more defeated after filtering through the micropore ceramics granule filter material at last, with medicament delivery thorough mixing in coagulation reactor.Concrete treatment process is as follows: water → pre-oxidation treatment device → primary oil removal tank → coagulation reactor → secondary settlement jar → outer defeated jar → output pump → porcelain filter → outer failing come at oily station.Referring to accompanying drawing 1, treatment scheme of the present invention comprises primary oil removal tank, secondary settlement jar, outer defeated jar and output pump, the employing pipeline connects, front end at primary oil removal tank connects the pre-oxidation treatment device, between primary oil removal tank and secondary settlement jar, connect coagulation reactor, medicament delivery is in coagulation reactor, at the most not end connection ceramic filter jar of flow process, interior dress micropore ceramics granule filter material.The voltage of pre-oxidation treatment device is any one among the 4v-10v, and electric current is any one among the 2000A-4000A.Referring to accompanying drawing 2, filling micropore ceramics granule filter material in the ceramic filter jar, for circular or oval, spheroid distribution aperture.Micropore ceramics granule filter material, its pore size distribution between 4～0.15 μ m, equivalent particle diameter is between the de=1.0-1.028, nonuniformity coefficient is between 1.45-1.48＜2.00, density is 1.25-1.4g/cm
3Between.When making the micropore ceramics granule filter material, by the optional allotment of above-mentioned numerical range, just each parameter of micropore ceramics granule filter material is chosen wherein a kind of allotment of making up wantonly according to above-mentioned various numerical ranges.Primary oil removal tank, secondary settlement jar and outer defeated jar used in the treatment scheme all adopt the glass cylinder of steel, and its connection line also adopts glass steel pipeline, and glass fiber reinforced plastics product is smooth, and is less scaling.The volume of used glass cylinder of steel is the arbitrary unit between 500-2000 cube.Primary oil removal tank, secondary settlement jar, coagulation reactor and outer defeated jar 2 covers in parallel at least, ceramic filter jar 3 covers in parallel at least, the ceramic filter jar parallel connection in the accompanying drawing 15 covers.
The working process of treatment process of the present invention and flow process is as follows:
Coming water is the recovered water at oil station, at first enter the pre-oxidation treatment device, make full use of oilfield sewage itself and be rich in the characteristics of soluble inorganic salts such as a large amount of NaCl, make the then abundant sharp electrochemical reaction of generation electrochemical method in the water by electrochemical apparatus, produce required strong oxidizing property material, need not add any preoxidation agent, thoroughly kill bacterium in the water with this; And, become the component useful, with the H in the water to sewage purification than the ferric ion that under the low ph condition oxidation of divalent iron ion is become to have cohesion
2S, FeS sulfides are oxidized to elemental sulfur, under the acting in conjunction of flocculation agent, break the CO that exists in the sewage
2-HCO
3 --CO
3 2-Weak acid and weak base buffer system and colloid equilibrium will be easy to generate the composition such as the H of burn into fouling under the surface condition
2S, CO
2Deng, in sewage treatment process, separate removal, thereby realize that purification of water quality, kill bacteria, control burn into suppress the fouling purpose by coagulant precipitation.Through making suspended substance flocculation and stable in the water after the processing of preoxidation device, remove strong corrosive material simultaneously, enter primary oil removal tank then and remove most oil slick.In order to reach mixed effect preferably, medicament adds and enters coagulation reactor, and the effect by " three anti-" medicament makes that oarse-grained impurity enters the secondary settlement jar in the recovered water, settles down in the secondary settlement jar simultaneously.Recovered water after the rough purification enters outer defeated jar, in order to reach the purpose of small particle size impurity in the further purification recovered water, enters porcelain filter behind the recovered water process output pump pressure-raising, filters by the micropore ceramics granule filter material.Filter back qualified water up to standard and transport to waterflood system outward and be injected into undergroundly, increase the stratum ability, improve development effectiveness.
Claims (9)
1. a method for treating water cut out from oil field at first uses the pre-oxidation treatment device that oil field extracted water is handled, and medicament delivery is arranged between primary oil removal tank and the secondary settlement jar, and is outer more defeated after filtering through the micropore ceramics granule filter material at last.
2. a kind of method for treating water cut out from oil field according to claim 1 is characterized in that between primary oil removal tank and secondary settlement jar coagulation reactor being set, with medicament delivery thorough mixing in coagulation reactor.
3. the treatment scheme that is used for claim 1 method for treating water cut out from oil field, comprise primary oil removal tank, secondary settlement jar, outer defeated jar and output pump, the employing pipeline connects, it is characterized in that connecting the pre-oxidation treatment device at the front end of primary oil removal tank, between primary oil removal tank and secondary settlement jar, connect coagulation reactor, at the least significant end connection ceramic filter jar of flow process.
4. treatment scheme according to claim 3, the voltage that it is characterized in that the pre-oxidation treatment device are any one among the 4v-10v, and electric current is any one among the 2000A-4000A.
5. treatment scheme according to claim 3 is characterized in that filling micropore ceramics granule filter material in the ceramic filter jar, and the micropore ceramics granule filter material is circular or oval, spheroid distribution aperture.
6. treatment scheme according to claim 5 is characterized in that the micropore ceramics granule filter material, and its pore size distribution is that 4～0.15 μ m, equivalent particle diameter are that de=1.0-1.028, nonuniformity coefficient are that 1.45-1.48＜2.00, density are 1.25-1.4g/cm
3, the micropore ceramics granule filter material is by the optional wherein a kind of combination allotment of above-mentioned numerical range.
7. treatment scheme according to claim 3 is characterized in that primary oil removal tank used in the treatment scheme, secondary settlement jar and outer defeated jar all adopt the glass cylinder of steel, and its connection line also adopts glass steel pipeline.
8. treatment scheme according to claim 7, the volume that it is characterized in that used glass cylinder of steel are the arbitrary units between 500-2000 cube.
9. treatment scheme according to claim 3 is characterized in that primary oil removal tank, secondary settlement jar, coagulation reactor and outer defeated jar 2 covers in parallel at least, ceramic filter jar 3 covers in parallel at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009100160207A CN101905936A (en) | 2009-06-04 | 2009-06-04 | Method for treating oil field produced water and treatment flow thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100160207A CN101905936A (en) | 2009-06-04 | 2009-06-04 | Method for treating oil field produced water and treatment flow thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259970A (en) * | 2011-03-08 | 2011-11-30 | 广州金川环保设备有限公司 | Method and device for pretreating oil field sewage by combining ultrasonic wave oxidation and electrochemical oxidation |
| CN102701347A (en) * | 2012-05-31 | 2012-10-03 | 周正坤 | Reaction and settlement device for treating water produced from oil field |
| CN102826706A (en) * | 2012-09-28 | 2012-12-19 | 湖南科技大学 | Oilfield produced water treatment method and device |
| US9593032B2 (en) | 2012-11-30 | 2017-03-14 | General Electric Company | Produced water treatment to remove organic compounds |
| CN107573094A (en) * | 2017-09-11 | 2018-01-12 | 蒙娜丽莎集团股份有限公司 | A kind of micropore ceramic filtration medium for hot environment and preparation method thereof |
-
2009
- 2009-06-04 CN CN2009100160207A patent/CN101905936A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259970A (en) * | 2011-03-08 | 2011-11-30 | 广州金川环保设备有限公司 | Method and device for pretreating oil field sewage by combining ultrasonic wave oxidation and electrochemical oxidation |
| CN102701347A (en) * | 2012-05-31 | 2012-10-03 | 周正坤 | Reaction and settlement device for treating water produced from oil field |
| CN102826706A (en) * | 2012-09-28 | 2012-12-19 | 湖南科技大学 | Oilfield produced water treatment method and device |
| CN102826706B (en) * | 2012-09-28 | 2014-02-12 | 湖南科技大学 | Oilfield produced water treatment method and device |
| US9593032B2 (en) | 2012-11-30 | 2017-03-14 | General Electric Company | Produced water treatment to remove organic compounds |
| CN107573094A (en) * | 2017-09-11 | 2018-01-12 | 蒙娜丽莎集团股份有限公司 | A kind of micropore ceramic filtration medium for hot environment and preparation method thereof |
| CN107573094B (en) * | 2017-09-11 | 2020-04-07 | 蒙娜丽莎集团股份有限公司 | Microporous ceramsite filter medium for high-temperature environment and preparation method thereof |
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Application publication date: 20101208 |