CN102559243A - Flexible dehydration device and method for recovered liquid of tertiary oil recovery - Google Patents
Flexible dehydration device and method for recovered liquid of tertiary oil recovery Download PDFInfo
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- CN102559243A CN102559243A CN2011104062338A CN201110406233A CN102559243A CN 102559243 A CN102559243 A CN 102559243A CN 2011104062338 A CN2011104062338 A CN 2011104062338A CN 201110406233 A CN201110406233 A CN 201110406233A CN 102559243 A CN102559243 A CN 102559243A
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Abstract
The invention discloses a flexible dehydration device and a method for a recovered liquid of tertiary oil recovery. According to the flexible dehydration device, connection among equipment and connection between the device and a crude oil pipeline are flexible; the device can be used integrally and also can be combined flexibly according to the requirement of actual production; the evaluation and selection of agent effects are performed by using certain part of the device, and dosing points are adjusted quickly according to the functions and characteristics of agents; residual oil in the device is convenient to clean, the experimental agents can be replaced quickly, and the selection time of the adjustment of varieties of the agents on site is shortened. According to the device, the precipitation time, water-level height and oil spillage running time of a primary precipitation tank and a secondary precipitation tank can be controlled by controlling the flow of crude oil, and factors for establishing an electric field are easy to analyze and regulate. The flexible dehydration device is an oil-water separation simulator which is flexible in combination, efficient, safe and attractive in appearance and can meet demands of different sites, and is suitable for the technical field of petrochemical industry.
Description
Technical field
The invention belongs to petrochemical industry, relate to a kind of flexibility dewatering device and method, be specifically related to a kind of flexibility dewatering device and method that is used for tertiary oil recovery produced liquid.
Background technology
As global main energy sources; This nonrenewable resource of oil still can remain on the leading position in the energy structure in decades from now on, therefore, how to improve oil recovery; The underground energy is exploited out as much as possible the problem that has just become petroleum industry and entire society to be concerned about.
Oil production mainly is divided into three phases, i.e. primary oil recovery, secondary oil recovery, TOR.Primary oil recovery and secondary oil recovery can only the underground crude oil of extraction 25%-50%.After secondary oil recovery was carried out decades, remaining oil was caught in oil reservoir sandstone space by circle with discontinuous oil clot, and contain a large amount of water in the extraction liquid this moment, normal moisture about 80%-90%, have in addition reach more than 98%, at this moment exploiting has not had economic benefit.The crude oil that the 60%-70% of reserves is arranged for this reason approximately; Can only rely on other physics and chemical process to exploit; The IT that has developed again to change between crude oil and the oil-displacing agent is master's a oil recovery technique with enlarging swept volume, it is characterized by and injects special fluid (like polymers soln, alkaline solution, surfactant soln or system, carbonic acid gas, water vapour etc.), and such exploitation is called " TOR "; Purpose is exactly in order to improve RF, as much as possible underground Oil extraction is come out.Obviously, as long as reasonable economically, also can develop into the oil recovery (as recovering the oil for four times etc.) of higher " level " after the TOR, also claim EOR (Enhanced Oil Recovery) abroad, i.e. intensified oil reduction.
According to 82 investigation that the waterflooding district carries out to 13 main oilfield of China, output liquid water cut reaches more than 90% at present, carries out TOR and is imminent.Since 1986, tertiary oil recovery technology has been listed in the national key scientific and technological project, has carried out a large amount of work sutdies and has made the tertiary oil recovery technology of China reach world lead level.According to news report, the grand celebration tertiary oil recovery technology becomes world's famous brand, is in world lead level, in Daqing oil field output is taken over, has brought into play decisive role.External EOR technology is with fastest developing speed with the U.S. in early days, but some oil companies have stopped the EOR that investment is big, RF is high test after 1981, and the development of EOR receives greater impact, and the EOR technical development of the U.S. is slow.FSU oil field is in the water filling period of great prosperity in 50 to the sixties, other EOR technique almost is development not, after the eighties, just begins to pay attention to other EOR technology except that water filling, and from then on the EOR technology has had large development.Generally speaking, the block of external big area life-time service polymer flooding or EOR technology is less.
Carry out at Daqing oil field, Shengli Oil Field since China in 1993 that polymer injection drives and " ternary composite driving " pilot field test.During the last ten years, oil displacement effect of polymer has obtained consistent approval, and the RF than water drive improves 21.1% and 13.4% respectively.But the lengthening of polymkeric substance time is used in the expansion that gathers scale with showwing loving care for, and the problem that comes out is also more and more, because the existence of chemical agent in the extraction liquid, the amount of polymers that returns out progressively increases, and makes the crude oil emulsion oil-water interfacial tension of extraction be reduced to 1 * 10
-2MN/m, the crude oil emulsion of extraction stability increases, the water that dissociate the naturally sewage that and breakdown of emulsion are deviate from, oleaginousness significantly rises, and has brought very big difficulty to WWT and produced-water reinjection.At present, it is more than the 3000mg/l that Daqing oil field three extraction liquid are handled the back sewage with oil, even some block takes off back sewage and can't handle because of oil-containing is too high, and nearly 30% oil injects the stratum with sewage again; Gudao area of Shengli Oilfield oil district; Polymer injection through more than ten years drives, and polymer content reaches about 120mg/l in the crude oil of extraction at present, and extraction liquid is more than the average sewage with oil 2500mg/l of processed; Be up to 6000-7000mg/l; And the moisture fluctuation status that always is in of outer oil transportation on average surpasses 5%, and needing to hang down mixed the failing of moisture outer oil transportation with other blocks could be qualified; Had a strong impact on on-the-spot ordinary production, therefore the development of the close-coupled processing medicament of profit is efficiently compeled at the tip of the brow with the foundation of in time estimating the multi-functional dewatering unit of powder performance and function Characteristics.
Patent shows (US5693216, US5921912, US5045212), and the utilization of external EOR technology has also brought O/W type oil in water emulsion, and cationic polymers capable of using is handled or before chemical demulsification, added and takes off processing in advance.The type emulsion is similar to the domestic polymer injection displacement of reservoir oil and carries out the field condition about 10 years, and adding is taken off agent in advance and can be controlled sewage with oil effectively.Along with the carrying out of polymer injection, the adding of taking off agent in advance directly influences dehydrating of crude oil, has guaranteed that the qualified crude oil water containing that but causes of sewage is higher.Domestic also have a lot of special researchs of handling to the polymer flooding polymer-bearing waste-water to report; Major part is to utilize chemical agent or improve flow process, the equipment oil in the sewage that suspends out; But do not notice that refiltered oil gets into the crude Treatment system; Can cause system chaotic, the lodging of electrical dehydrator electric field, electricity takes off ineffective practical situation.The isolated island test in place shows, the domestic and international producer that comprises external Clariant company does not also have a kind of medicament to oily water treatment can guarantee that in the reasonable cost span of control oil, the water time simultaneously up to standard is all above one.
We can say that the fast development of three technology of adopting has brought very big economic benefit, but the investigative technique of the close-coupled processing medicament of profit lags behind seriously, directly influenced the abundant application of three technology of adopting, force its intermittent stopping using.Also do not have in the situ production at present to solve the chemical agent that tertiary oil recovery produced liquid is handled fully.No matter Daqing oil field still is a Shengli Oil Field etc.; The defeated handling problem of extraction liquid collection takes place often; Basically all be to reduce on-the-spot oil-displacing agent IR or stop to inject for some time, or moisture higher slops is exported by force, mix output with the moisture lower outer oil transportation of other blocks.The research of the integrated medicament of profit and field evaluation, quick replacing had timely become one of further principal element that enlarges the use scale of restriction three technology of adopting during " TOR " extraction liquid collection was failed and handled.
Summary of the invention
The objective of the invention is to overcome the defective of prior art, set up the flexibility dewatering device that is used for tertiary oil recovery produced liquid of the on-the-spot actual motion flow process of a cover simulation, and corresponding method is provided.Its technical scheme is:
A kind of flexibility dewatering device that is used for tertiary oil recovery produced liquid mainly is made up of triphase separator 1, slurry tank 2, secondary settlement jar 3, electrical heater 4, hot slurry tank 5, an electrical dehydrator 6.
This device can be used for tertiary oil recovery produced liquid whole process simulation process; Also can carry out the test of local flow process dehydrant agent according to the requirement of the each sedimentation oil spilling of on-the-spot technology dewatering process flow water cut; Can select to come liquid change medicament to make an experiment to this step oil in water emulsion in case moisture higher phenomenon occurs, medicament injects pipeline through rampump.If the leading portion outlet valve is closed in local test, directly will test the corresponding dewatering unit of oil in water emulsion introducing device and inject suitable medicament, investigate the moisture of upper end oil spilling.
Investigate the action effect of medicament according to the rate of water loss of medicament, dehydration rate, dehydration water quality, the on-the-spot crude oil residence time, thereby and judge that according to this medicament oleophylic, hydrophilic size and in the distribution of oil, aqueous phase it is applicable to that the further dehydration of which section oil spilling selects the suitable snack made with traditional Chinese medicines that adds.Should keep the height of slurry tank upper strata oil reservoir and middle water layer relatively stable in the process flow operation, the flow of the aperture size adjustment crude oil of the valve through real-time monitoring.Electrical dehydrator shows the electrical parameter of crude oil between the upper electrode plate through external specific inductivity real time monitoring apparatus.
A kind of dewatering that is used for tertiary oil recovery produced liquid, the initial gross separation of Oil, Water, Gas in the triphase separator 1 extraction liquid, a large amount of oily(waste)water free-waters station that intakes is side by side discharged in its bottom; Accompanying gas is discharged at the top; Intermediary contains 2, slurry tanks 2 of a water-emulsified oil slurry tank of entering and further dewaters, and the oil spilling that comes out in its top gets into secondary settlement jar 3; In secondary settlement jar 3, carry out the more dehydration of the degree of depth, the oil in water emulsion water cut is further reduced.4 pairs of secondary settlement jar 3 oil of electrical heater heat up, and get into hot slurry tank 5, make that water cut is reduced to 30% to be issued to the index request that oil in water emulsion gets into electrical dehydrator in the oil in water emulsion.Utilize effect of electric field to make the further coalescence of emulsified water, sedimentation in the crude oil in the electrical dehydrator.Thereby reach outer oil transportation and contain water quality standard below 0.5%.This device both can carry out the whole process test, also can be through valve control carrying out sectional local test
Beneficial effect of the present invention:
1, flexibly connect between dewatering unit according to the invention and crude oil pipeline and the equipment, device needs flexible combination by situ production, and required oil sample is prone to introduce, the Residual oil easy to clean when changing medicament in the equipment.
2, the present invention is in specific operation process, and the adding point that can adjust medicament rapidly according to the action effect and the characteristic of medicament is to satisfy the actual needs of situ production.
3, first and second slurry tank settling time, elevation of water surface and the oil spilling of dewatering unit according to the invention are controlled working time, can meet the demand of different websites as far as possible.
4, the specific inductivity of crude oil between the ability of the electrical dehydrator in the dewatering unit of the present invention on-line monitoring battery lead plate is convenient to the timely adjustment electric field, guarantees the foundation of actual electric field.
Description of drawings
Fig. 1 is the structural representation that the present invention is used for the flexibility dewatering device of tertiary oil recovery produced liquid.
Embodiment
Describe embodiment of the present invention in detail below in conjunction with specific embodiment.
Lonely two joint stations in embodiment 1 Gudao area of Shengli Oilfield oil recovery factory, defeated outward self-cleaning oil is moisture reaches 8%, severe overweight.(raw oil is claimed in the oil field again with the oil spilling of an on-the-spot slurry tank; Water cut is 62%) directly introduce flexible apparatus secondary settlement jar; It is composite to select for use emulsion splitter SLD5010 that Shengli Oil Field triumph chemical industry ltd produces and SLD2072 to carry out, and secondary jar oil spilling water cut reduces to 27% in the flexible apparatus, directly gets into electrical dehydrator; Electric field is stable, and self-cleaning oil is moisture to be 0.3%; In time add this medicament before the secondary jar at the scene, the second defeated beyond the highest heavens self-cleaning oil is moisture to be 0.4%, reaches outer defeated standard.
" electric field " phenomenon appears in lonely six joint stations in embodiment 2 Gudao area of Shengli Oilfield oil recovery factories, and the crude oil in the hot slurry tank in scene is directly introduced the flexible electrical water trap, and recording specific inductivity is 20, shows that water cut is on the low side, adds 8%NaCl, 5%AlCl
3, the mixed aqueous solution formed of 5% emulsion resistance emulsion splitter SLD-5010,3% Glacial acetic acid min. 99.5, electric field recovers.120Kg is in time squeezed at the scene behind slurry tank should mix water-soluble introducing, and electric field recovers steadily after 6 hours.
The defeated outward self-cleaning oil of lonely two joint stations in embodiment 3 Gudao area of Shengli Oilfield oil recovery factories is moisture higher always, and the indoor static evaluating drug is respond well, is difficult to find the problem in the process flow operation.Carry out whole process through the flexibility dewatering device and test, adjustment adds snack made with traditional Chinese medicines, and once a jar preceding dosing changes into once before the jar and dosing before the process furnace, and defeated self-cleaning oil water cut is up to standard outside the small testing device demonstration.Actual field adds 200Kg/ days with the original dose that adds before once jar by before becoming in 350Kg/ days once jar, before the process furnace 150Kg/ days.It is outer defeated that self-cleaning oil is moisture reduces to below the criterion of acceptability.
The oleaginousness that lonely three joint stations in embodiment 4 Gudao area of Shengli Oilfield oil recovery factories take off in the sewage of back because of control is lower than 100mg/L, and the well array before triphase separator takes to add in advance in the liquid water conditioner (taking off agent in advance), makes flow process unstable, moisture higher always.Carry out whole process test through the flexibility dewatering device, the result has cancelled well array and has come liquid to add to take off agent in advance, before directly adjustment being added snack made with traditional Chinese medicines and changes into once jar behind the adjustment dehydration medicament, before the electrical dehydrator, and the on-the-spot held stationary that moves.
The above; Be merely the preferable embodiment of the present invention; Protection scope of the present invention is not limited thereto; Any technician who is familiar with the present technique field is in the technical scope that the present invention discloses, and the simple change of the technical scheme that obtains or equivalence replacement all fall in protection scope of the present invention with may be obvious that.
Claims (2)
1. a flexibility dewatering device that is used for tertiary oil recovery produced liquid is characterized in that, mainly is made up of triphase separator (1), a slurry tank (2), secondary settlement jar (3), electrical heater (4), hot slurry tank (5), electrical dehydrator (6).
2. a dewatering that is used for tertiary oil recovery produced liquid is characterized in that, the initial gross separation of Oil, Water, Gas in triphase separator (1) the extraction liquid; Oily(waste)water station that intakes is side by side discharged in its bottom; Accompanying gas is discharged at the top, and intermediary contains water-emulsified oil and gets into a slurry tank (2), and a slurry tank (2) further dewaters; The oil spilling that comes out in its top gets into secondary settlement jar (3), in secondary settlement jar (3), carries out the more dehydration of the degree of depth; Electrical heater (4) comes oil to heat up to secondary settlement jar (3), gets into hot slurry tank (5); Utilize effect of electric field to make the further coalescence of emulsified water, sedimentation in the crude oil in the electrical dehydrator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104062338A CN102559243A (en) | 2011-12-09 | 2011-12-09 | Flexible dehydration device and method for recovered liquid of tertiary oil recovery |
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| CN2011104062338A CN102559243A (en) | 2011-12-09 | 2011-12-09 | Flexible dehydration device and method for recovered liquid of tertiary oil recovery |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408153A (en) * | 2013-07-29 | 2013-11-27 | 常州大学 | Physical emulsion resolving treating device for sewage containing emulsified oil and treating method thereof |
| CN106833727A (en) * | 2017-01-18 | 2017-06-13 | 中石化石油工程技术服务有限公司 | For crude oil Produced Liquid dewater treatment technique and device containing complicated emulsion |
| CN108219834A (en) * | 2016-12-14 | 2018-06-29 | 中国海洋石油集团有限公司 | A kind of method of crude oil dual treatment |
| CN109135819A (en) * | 2018-10-19 | 2019-01-04 | 中石化南京工程有限公司 | A kind of system and method handling oil well crude oil |
| CN109852416A (en) * | 2018-12-13 | 2019-06-07 | 新疆科力新技术发展股份有限公司 | Oil field central treating station Produced Liquid cryogenic seal interface fast dewatering method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN200958095Y (en) * | 2006-06-23 | 2007-10-10 | 北京迪威尔石油天然气技术开发有限公司 | Enhanced dewatering treating bar of crude-oil electrothermal microwave |
| CN101078345A (en) * | 2007-06-27 | 2007-11-28 | 胜利油田胜利工程设计咨询有限责任公司 | Oil field extraction liquid electromagnetic agglomerating pretreatment device |
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2011
- 2011-12-09 CN CN2011104062338A patent/CN102559243A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200958095Y (en) * | 2006-06-23 | 2007-10-10 | 北京迪威尔石油天然气技术开发有限公司 | Enhanced dewatering treating bar of crude-oil electrothermal microwave |
| CN101078345A (en) * | 2007-06-27 | 2007-11-28 | 胜利油田胜利工程设计咨询有限责任公司 | Oil field extraction liquid electromagnetic agglomerating pretreatment device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408153A (en) * | 2013-07-29 | 2013-11-27 | 常州大学 | Physical emulsion resolving treating device for sewage containing emulsified oil and treating method thereof |
| CN103408153B (en) * | 2013-07-29 | 2015-06-24 | 常州大学 | Physical emulsion resolving treating device for sewage containing emulsified oil and treating method thereof |
| CN108219834A (en) * | 2016-12-14 | 2018-06-29 | 中国海洋石油集团有限公司 | A kind of method of crude oil dual treatment |
| CN108219834B (en) * | 2016-12-14 | 2020-07-14 | 中国海洋石油集团有限公司 | Crude oil quality-grading treatment method |
| CN106833727A (en) * | 2017-01-18 | 2017-06-13 | 中石化石油工程技术服务有限公司 | For crude oil Produced Liquid dewater treatment technique and device containing complicated emulsion |
| CN109135819A (en) * | 2018-10-19 | 2019-01-04 | 中石化南京工程有限公司 | A kind of system and method handling oil well crude oil |
| CN109135819B (en) * | 2018-10-19 | 2021-05-11 | 中石化南京工程有限公司 | System and method for treating crude oil of oil well |
| CN109852416A (en) * | 2018-12-13 | 2019-06-07 | 新疆科力新技术发展股份有限公司 | Oil field central treating station Produced Liquid cryogenic seal interface fast dewatering method and device |
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Application publication date: 20120711 |