CN104807981A - Device and method for evaluating dynamic demulsification and dehydration characteristics of crude oil emulsion - Google Patents
Device and method for evaluating dynamic demulsification and dehydration characteristics of crude oil emulsion Download PDFInfo
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Abstract
The invention discloses a device and method for evaluating dynamic demulsification and dehydration characteristics of a crude oil emulsion. The device comprises an emulsion feeding tank, electric heating devices, a high-speed shearing dispersion machine, an emulsion metering pump, a thermometer, a demulsification box, an emulsion recovery tank, a demulsifier feeding tank, a medicament feeding pump, a high-voltage power supply and an oscilloscope, wherein the emulsion feeding tank and the emulsion recovery tank are connected with an inlet of the emulsion metering pump through a three-way valve; an outlet of the emulsion metering pump is connected with an inlet of the demulsification box; an outlet of the demulsification box is connected with the emulsion feeding tank and the emulsion recovery tank through a three-way valve; a front sampling port and a rear sampling port are formed in an inlet pipeline and an outlet pipeline of the demulsification box respectively; the high-voltage power supply and the oscilloscope are sequentially connected to apply a high-voltage electric field to the demulsification box, and the demulsifier feeding tank and the medicament feeding pump are arranged on the inlet pipeline, in front of the front sampling port, of the demulsification box. The structure is compact, few crude oil emulsions are consumed, continuous flowing is realized, observation is convenient due to the fact that a box body of the demulsification box is made of a transparent material, and the device and the method can be used for quickly evaluating the dynamic demulsification and dehydration characteristics of the crude oil emulsion in a laboratory or a project site.
Description
Technical field
The present invention relates to a kind of crude oil emulsion dynamic breaking emulsion and dewatering characteristic test technology, particularly relate to the dynamic breaking emulsion and dewatering apparatus for evaluating characteristics of a kind of crude oil emulsion and evaluation method.
Background technology
Water is almost " like the shadow following the person " in the process of oil extraction, along with oil field each in world wide progressively enters exploitation middle and later periods and the widely using of intensified oil reduction (EOR) technology, water percentage in oil well produced liquid rises year by year, emulsification degree is on the rise, not only often occur water percentage higher than 15% crude oil emulsion enter the situation of electrical dehydrator, and the thickness of emulsion layer increases in electrical dehydrator, the factors such as emulsion stability enhancing all make original electrical dehydrator be difficult to reply, frequent appearance " collapse electric field " even " creepage " phenomenon, be difficult to the moisture control of electrical dehydrator oil-out crude oil below 0.5%, each oil field is all in the method actively finding reply for this reason.Meanwhile, domestic and international researcher has carried out extensive application fundamental research for the breaking emulsion and dewatering characteristic of w/o type emulsion, research wherein for not same electric field designing technique is mainly devoted to inquire into not same electric field form (uniform electric field, non-uniform electric field, DC impulse electric field, AC impulse electric field, the two electric fields of AC/DC etc.), different electric pulse field parameter (electric field waveform, electric field intensity, electric field frequency, electric field duty cycles etc.) to electric field breaking emulsion and dewatering performance, the impact of power consumption, wherein the research of different electric pulse field parameter is found: electric field waveform has a great impact crude oil electrostatic coalescence effect, there is upper critical value, lower critical value in electric field intensity, has good electrostatic coalescence breaking emulsion and dewatering effect when electric field intensity is positioned at this interval, there is optimal value in electric field frequency, when electric field frequency is positioned near optimal frequency, the stability of emulsification of crude oil liquid system is the poorest, and crude oil demulsification dehydration is most effective, dutycycle not only affects breaking emulsion and dewatering effect, also has a great impact power consumption.Certainly, the research for different chemical emulsion breaker is then mainly devoted to inquire into emulsion breaker kind, concentration to the impact of emulsion breaker dewatering, dehydration water quality.
For obtaining optimum electric pulse field parameter corresponding to different crude oils emulsion breaking emulsion and dewatering or emulsion breaker kind and additive capacity thereof, need and carry out lot of experiments pointedly, but the technological parameter of domestic and international each Oil Field actual production system regulates variation range limited, be difficult to make complete evaluation to optimized parameter, the restriction of laboratory internal cause each side condition, working condition and scene reality have a great difference again, and therefore conclusion often differs greatly with actual conditions.
The people such as the Liaohe Petroleum Exploration Bureau Li Jia rising sun mention a kind of crude oil dewatering dynamic analog device in patent CN200964398Y, this device proposes " dynamically " this concept, and evaluation experimental can be carried out for outer output oil additive amount of medicament, working temperature, dewatering time three parameters, but this device only can provide 220V constant voltage source, do not relate to the evaluation of different electric pulse field parameter to breaking emulsion and dewatering performance.
The refined sweet smell of Shaanxi high-new energy development Co., Ltd. Zhang mentions a kind of electrical dewatering experimental system in patent CN103555360A, this system comprises high frequency pulse power supply, emulsifying tank, micro-lens, copper plate electrode is provided with in the emulsifying tank of the sight rank that is situated between, this device only can in a static condition by using microscope to observe the crude oil emulsion under electric field action, and function is very limited.
The people such as Harbin University of Science and Technology's Chen Guoqing propose a kind of dehydration of crude oil dynamic and visual analogue means in patent CN103059909A, and utilize this device to prepare the method for the dehydration of crude oil, this device is by high-voltage power supply, die heater, blend tank is sheared in emulsification, crude oil measurement pump, high-tension electricity hydroextractor, waste liquid tank, the compositions such as ebullator, crude oil can be completed in different temperatures, flow, the electric field treatment time, battery lead plate spacing, dynamic dehydration characteristic evaluation experimental under electric pulse field parameter condition, breakdown of emulsion box has visual windows simultaneously, can Real-Time Monitoring water-oil interface layer situation of change.But device still exists a lot of weak point: 1. device volume is large, high-tension electricity evaporator structure complicated, not only need in operational process to consume a large amount of crude oil emulsions, and the timely cleaning problem that experiment terminates rear equipment is also difficult to effective solution; 2. this device electrode plate is bare metal material, there will be " collapse electric field " phenomenon when water percentage is too high, is difficult to make effective evaluation to the breaking emulsion and dewatering characteristic of different electric pulse field parameter under high-moisture percentage; 3. in breaking emulsion and dewatering effect assessment mode, this device is monitored upper strata crude oil, lower floor's sewage by means of only use water percentage on-line computing model, oil extraction, draining is carried out respectively as crude oil layer water percentage <0.5%, water layer water percentage >99.5%, by visual windows, oil reservoir is observed simultaneously, only can evaluate electrical dewatering performance from macroscopic perspective, accurately cannot sample and characterize electric field to the impact of emulsion physicochemical property.Be difficult to the applied basic research be used for by this equipment in non-industrial enterprise subordinate laboratory in sum.
The people such as China Petrochemical Industry refinery Engineering stock Co., Ltd Cao development propose a kind of visual dynamic electric dehydration analogue means in CN203768310U, this transposition is made up of heating crude oil tank, water injection tank, mix and blend heating tank, high-voltage power supply, plunger metering pump and recycling can, its electrical dewatering can body part is made up of glass, the Real Time Observation to crude oil emulsion in tank can be realized, but there is following problem: 1. bare metal electrode cannot implement electric field breakdown of emulsion to high-moisture percentage crude oil emulsion; 2. except not having all the other evaluation meanses to crude oil emulsion electric field breaking emulsion and dewatering situation in tank except carrying out observation, conclusion is theoretically unsound; 3. device volume is excessive, will certainly consume more crude oil emulsion in operational process, is difficult to be applied in non-industrial enterprise subordinate laboratory.
Analytical instrument factory of Taizhou Jiangyan City is at present to the dynamic electric desalting test device of JDYZ-1 type that each oil field, refinery are sold, comprise oil-water mixer, electrical dehydrator, nitrogen pressure supplement system, water-oil interface automatic control system, over-temp and over-pressure warning system etc., this device characteristic is to be equipped with computer control system, can carry out Real-Time Monitoring and control by computing machine to the parameters in experimentation, automaticity is higher.But this experimental provision is deposited also in many weak points: 1. electrical dehydrator uses stainless steel, in operational process, real-time monitored cannot be carried out to the flow state of wherein emulsion; 2. battery lead plate adopts bare metal material, " collapse electric field " phenomenon can occur when crude oil emulsion water percentage is too high, cannot probe into the dehydration characteristic of different electric pulse field parameter under high-moisture percentage; 3. consume substantial oil emulsion in operational process, be difficult to when Laboratory Crude Oil limited sample carry out the deep experimental study of system; 4. this apparatus design is complicated, and when emulsification of crude oil fluid viscosity is too high, pipeline very easily blocks, and the cleaning problem that experiment terminates rear equipment is also difficult to solve.
In sum, the static breaking emulsion and dewatering experimental result of crude oil emulsion of the prior art differs larger with engineering site; Existing commercial dynamically (electric field) breaking emulsion and dewatering evaluation experimental plant bulk is comparatively large, and crude oil emulsion consumption is many, and equipment clean and maintenance wastes time and energy; And the pole plate of existing commercial dynamically (electric field) breaking emulsion and dewatering evaluation experimental device is bare metal, cannot adapt to High water cut emulsion.
Summary of the invention
The object of this invention is to provide and a kind ofly can make the dynamic breaking emulsion and dewatering apparatus for evaluating characteristics of the crude oil emulsion evaluated fast and effectively and evaluation method to the dynamic breaking emulsion and dewatering characteristic of different crude oils emulsion under different electric pulse field parameter/emulsion breaker kind/emulsion breaker dosage.
The object of the invention is to be achieved through the following technical solutions:
Crude oil emulsion of the present invention dynamic breaking emulsion and dewatering characteristic Fast Evaluation device, comprises emulsion gravitation tank, electric heating equipment, high speed shear dispersion machine, emulsion volume pump, thermometer, breakdown of emulsion box, emulsion recycling can, emulsion breaker gravitation tank, dosing pump, high-voltage power supply, oscillograph;
Described emulsion gravitation tank is connected by the entrance of T-valve with described emulsion volume pump with emulsion recycling can, described emulsion metering delivery side of pump connects breakdown of emulsion box entrance, and the outlet of breakdown of emulsion box is connected with emulsion recycling can with described emulsion gravitation tank by T-valve;
The entrance pipe of described breakdown of emulsion box and export pipeline are respectively equipped with front sample tap and rear sample tap, described emulsion breaker gravitation tank is connected with the entrance of described dosing pump, and described dosing delivery side of pump is connected with the entrance pipe of described breakdown of emulsion box before described front sample tap by gate valve.
The above-mentioned crude oil emulsion dynamic breaking emulsion and dewatering apparatus for evaluating characteristics of application of the present invention realizes the evaluation method of the dynamic breaking emulsion and dewatering characteristic of crude oil emulsion, comprises step:
A, proportionally crude oil, water, emulsifying agent are put into emulsion gravitation tank, after making mixed liquor maintain design temperature by electric heating equipment, high speed shear dispersion machine is used to carry out shear agitation to mixed liquor, to make the crude oil emulsion of different degree of stability;
After B, crude oil emulsion have been prepared, open emulsion volume pump, with the flow velocity of setting, crude oil emulsion is pumped into breakdown of emulsion box, until crude oil emulsion after steady flow in Fast Evaluation device, pass through regulating three-way valve, crude oil emulsion through electric field action is squeezed in emulsion recycling can, open high-voltage power supply, oscillograph successively subsequently, for breakdown of emulsion box applies high-voltage electric field, to carry out electric field breaking emulsion and dewatering to flowing crude oil emulsion wherein;
C, after front sample tap takes a morsel crude oil emulsion sample, the hydraulic detention time corresponding to different in flow rate, the crude oil emulsion sample after a certain interval after rear sample tap place takes a morsel breakdown of emulsion;
D, in conjunction with front sample tap, rear sample tap institute sample thief, by surveying instrument, analysis and characterization is carried out to disperse phase particle water particle diameter, emulsion stability etc. in crude oil emulsion, evaluate the effect of crude oil emulsion electric field breaking emulsion and dewatering from quantitative angle; Also can carry out centrifugal treating by centrifugal separator to crude oil emulsion sample, evaluate breaking emulsion and dewatering effect by the dehydrating amount after contrast centrifuging;
After E, experiment terminate, first by emptying for the crude oil emulsion in device, appropriate clean-out system is poured in emulsion gravitation tank, open emulsion volume pump, by regulating T-valve before and after breakdown of emulsion box, it is made back and forth to flow at emulsion gravitation tank, breakdown of emulsion box, emulsion recycling can Inner eycle, the cleaning of quick finishing device.
As seen from the above technical solution provided by the invention, the dynamic breaking emulsion and dewatering apparatus for evaluating characteristics of the crude oil emulsion that the embodiment of the present invention provides and evaluation method, for making Fast Evaluation for the dynamic breaking emulsion and dewatering characteristic of identical or different crude oil emulsion under identical or different electric pulse field parameter/emulsion breaker kind/demulsifier concentration, this evaluating apparatus has compact conformation, few and the continuous flow of crude oil emulsion consumption, breakdown of emulsion box shell material is transparent is convenient to the advantages such as observation, not only in laboratory, Fast Evaluation can be made to the dynamic breaking emulsion and dewatering characteristic of crude oil emulsion, also portable set can be made simultaneously, for engineering site provides effective testing service.
Accompanying drawing explanation
The schematic flow sheet of the crude oil emulsion dynamic breaking emulsion and dewatering characteristic Fast Evaluation device that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the main sectional structure schematic diagram of breakdown of emulsion box (8) in the embodiment of the present invention;
Fig. 3 is the cut-open view of the A-A line of Fig. 2.
In figure, each mark is as follows:
1-emulsion feeder sleeve, 2-electric heating equipment, 3-high speed shear dispersion machine, 4-T-valve, 5-emulsion volume pump, 6-thermometer, sample tap before 7-, 8-breakdown of emulsion box, 9-breakdown of emulsion box low pressure end, sample tap after 10-, 11-T-valve, 12-emulsion recycling can, 13-high-voltage power supply, 14-breakdown of emulsion box high-pressure side, 15-voltage test signal, 16-current test signal, 17-oscillograph, 18-emulsion breaker gravitation tank, 19-dosing pump, 20-gate valve, end cap on the left of 21-, 22-low pressure electrode plate insulation material, 23-low tension pole plate, 24-breakdown of emulsion box entrance, 25-breakdown of emulsion box housing, 26-packing washer, 27-electrode plate with high voltage, 28-high-pressure polar plate insulating material, end cap on the right side of 29-, 30-breakdown of emulsion box exports, 31-rectangle tortuous flow path.
Embodiment
To be described in further detail the embodiment of the present invention below.
Crude oil emulsion of the present invention dynamic breaking emulsion and dewatering characteristic Fast Evaluation device, its preferably embodiment be:
Comprise emulsion gravitation tank 1, electric heating equipment 2, high speed shear dispersion machine 3, emulsion volume pump 5, thermometer 6, breakdown of emulsion box 8, emulsion recycling can 12, emulsion breaker gravitation tank 18, dosing pump 19, high-voltage power supply (13), oscillograph (17);
Described emulsion gravitation tank 1 is connected by the entrance of T-valve 4 with described emulsion volume pump 5 with emulsion recycling can 12, the outlet of described emulsion volume pump 5 connects breakdown of emulsion box entrance 24, and breakdown of emulsion box outlet 30 is connected with emulsion recycling can 12 with described emulsion gravitation tank 1 by T-valve 11;
The entrance pipe of described breakdown of emulsion box 8 and export pipeline are respectively equipped with front sample tap 7 and rear sample tap 10, described emulsion breaker gravitation tank 18 is connected with the entrance of described dosing pump 19, and the outlet of described dosing pump 19 is connected with the entrance pipe of described breakdown of emulsion box 8 before described front sample tap 7 by gate valve 20.
Described high-voltage power supply (13) and oscillograph (17) are interconnected, and described high-voltage power supply 13 is connected with described breakdown of emulsion box high-pressure side 14.
Be provided with described electric heating equipment 2 in described emulsion gravitation tank 1, the export pipeline of described emulsion gravitation tank 1 is provided with described thermometer 6, the export pipeline of described emulsion gravitation tank 1 is provided with the hot equipment of companion.
Described breakdown of emulsion box 8 comprises breakdown of emulsion box housing 25, left side end cap 21 and right side end cap 29, described left side end cap 21, to be bolted between right side end cap 29 and breakdown of emulsion box housing 25, and be provided with packing washer 26, described left side end cap 21 and right side end cap 29 are fixed with low tension pole plate 23 and electrode plate with high voltage 27 respectively, and the bottom of described breakdown of emulsion box housing 25 and top are respectively equipped with breakdown of emulsion box entrance 21 and breakdown of emulsion box outlet 30.
The surface of described electrode plate with high voltage 27 and low tension pole plate 23 is coated with insulation course 28,22 respectively, and use insulating material respectively described electrode plate with high voltage 27 and low tension pole plate 23 to be cast into an entirety with described right side end cap 29, left side end cap 21, described electrode plate with high voltage 27, low tension pole plate 23 are connected with the external world respectively by breakdown of emulsion box high-pressure side 14, breakdown of emulsion box low pressure end 9, and described electrode plate with high voltage 27, low tension pole plate 23 surround rectangle tortuous flow path 31 jointly with breakdown of emulsion box housing 25.
Described emulsion gravitation tank 1, emulsion recycling can 12 and breakdown of emulsion box housing 25 are transparent material.
Whole evaluating apparatus is the portable skid structure be placed in box-type shell, and is provided with display touch-screen.
The above-mentioned crude oil emulsion dynamic breaking emulsion and dewatering apparatus for evaluating characteristics of application of the present invention realizes the evaluation method of the dynamic breaking emulsion and dewatering characteristic of crude oil emulsion, its preferably embodiment be:
Comprise step:
A, proportionally crude oil, water, emulsifying agent are put into emulsion gravitation tank 1, after making mixed liquor maintain design temperature by electric heating equipment 2, high speed shear dispersion machine 3 pairs of mixed liquors are used to carry out shear agitation, to make the crude oil emulsion of different degree of stability;
After B, crude oil emulsion have been prepared, open emulsion volume pump 5, with the flow velocity of setting, crude oil emulsion is pumped into breakdown of emulsion box 8, until crude oil emulsion after steady flow in Fast Evaluation device, by regulating three-way valve 11, crude oil emulsion through electric field action is squeezed in emulsion recycling can 12, open high-voltage power supply 13, oscillograph 17 subsequently successively, for breakdown of emulsion box 8 applies high-voltage electric field, to carry out electric field breaking emulsion and dewatering to flowing crude oil emulsion wherein;
C, after front sample tap 7 takes a morsel crude oil emulsion sample, the hydraulic detention time corresponding to different in flow rate, the crude oil emulsion sample after a certain interval after rear sample tap 10 place takes a morsel breakdown of emulsion;
D, combination front sample tap 7, rear sample tap 10 sample thiefs, carry out analysis and characterization by surveying instrument to disperse phase particle water particle diameter, emulsion stability etc. in crude oil emulsion, evaluate the effect of crude oil emulsion electric field breaking emulsion and dewatering from quantitative angle; Also can carry out centrifugal treating by centrifugal separator to crude oil emulsion sample, evaluate breaking emulsion and dewatering effect by the dehydrating amount after contrast centrifuging;
After E, experiment terminate, first by emptying for the crude oil emulsion in device, appropriate clean-out system is poured in emulsion gravitation tank 1, open emulsion volume pump 5, by regulating T-valve 4,11 before and after breakdown of emulsion box 8, it is made back and forth to flow at emulsion gravitation tank 1, breakdown of emulsion box 8, emulsion recycling can 12 Inner eycle, the cleaning of quick finishing device.
In described step B, until crude oil emulsion after steady flow in Fast Evaluation device, except use electric field breakdown of emulsion, can also use on the pipeline of dosing pump 19 between front sample tap 7 and breakdown of emulsion box 8 and inject emulsion breaker, under emulsion breaker independent role or " electric field+emulsion breaker " acting in conjunction, Fast Evaluation can also be carried out to its breaking emulsion and dewatering characteristic;
Before and after in described step C, sample tap sampling interval time should be corresponding with the emulsion electric field action time, makes experimental data more credible by measuring the crude oil emulsion of same batch of contrast as far as possible;
In the process that described step D characterizes sample analysis, can the data such as disperse phase particle water particle diameter, emulsion stability, centrifugal dehydration rate in independent measurement crude oil emulsion, also can by several characterization method conbined usage.
Crude oil emulsion of the present invention dynamic breaking emulsion and dewatering characteristic Fast Evaluation device and evaluation method, can more comprehensive, scientifical in laboratory or engineering site the dynamic breaking emulsion and dewatering characteristic of different crude oils emulsion under different electric pulse field parameter/emulsion breaker kind/emulsion breaker dosage made evaluate fast and effectively.
Go out corresponding Fast Evaluation device through actual processing and manufacturing and through shop experiment test, show that tool of the present invention has the following advantages and effect:
1, the emulsion in device is continuous flow state, solves in laboratory in the past the problem that situation gap in the data and engineering site using static demulsification and dehydration device to draw is larger.
2, the w/o type emulsion volume less (can 2.5L be low to moderate) owing to consuming during emulsion dynamic breaking emulsion and dewatering characteristic Fast Evaluation plant running, make to make evaluating easily and efficiently to the dehydration characteristic such as electric field breakdown of emulsion, chemical demulsification of different emulsion in laboratory to become possibility, the portable skid structure be placed in box-type shell can be made simultaneously, can not only be laboratory like this, and test evaluation service timely and effectively can be provided for engineering site.
3, because metal electrode board-like in breakdown of emulsion box all adopts insulating material to build sealing, comparing the battery lead plate of bare metal material in traditional electric field dehydration evaluating apparatus, also there will not be " collapse electric field " phenomenon when processing High water cut w/o type emulsion.
4, emulsion gravitation tank, emulsion recycling can, breakdown of emulsion box housing all adopt transparent material to make, and are convenient to the gravity separation effect of settling after to emulsion breakdown of emulsion and carry out real-time visual observation.
5, emulsion dynamic breaking emulsion and dewatering characteristic Fast Evaluation device is used, for front and back sample tap emulsion sample, by measuring its drop particle diameter, stability characterizes, centrifugal dehydration rate quantitative observation and to evaluation meanses such as breakdown of emulsion box internal state real-time photography records, can make the objective and comprehensively careful evaluation of science to crude oil emulsion dynamic breaking emulsion and dewatering performance.
Specific embodiment:
Embodiment one:
As shown in Figure 1, Figure 2, Figure 3 shows, present embodiment crude oil emulsion dynamic breaking emulsion and dewatering characteristic Fast Evaluation device comprises: the compositions such as emulsion gravitation tank (1), electric heating equipment (2), high speed shear dispersion machine (3), emulsion volume pump (5), thermometer (6), breakdown of emulsion box (8), emulsion recycling can (12), high-voltage power supply (13), oscillograph (17), emulsion breaker gravitation tank (18), dosing pump (19).Emulsion gravitation tank (1), emulsion recycling can (12) is connected with emulsion volume pump (5) entrance by T-valve (4), emulsion volume pump (5) outlet connects breakdown of emulsion box entrance (24), breakdown of emulsion box outlet (30) is by T-valve (11) and emulsion gravitation tank (1), emulsion recycling can (12) is connected, high-voltage power supply (13), oscillograph (17) is connected successively, wherein high-voltage power supply (13) is connected with breakdown of emulsion box high-pressure side (14) and can be breakdown of emulsion box (8) and provide high-voltage electric field, meanwhile emulsion breaker gravitation tank (18) same to dosing pump (19) is connected, pipeline between front sample tap (7) and breakdown of emulsion box (8) can inject emulsion breaker, breakdown of emulsion box (8) is primarily of left side end cap (21), right side end cap (29), low tension pole plate (23), electrode plate with high voltage (27), breakdown of emulsion box housing (25) is formed, left side end cap (21), right side end cap (29) are bolted with between breakdown of emulsion box housing (25), use packing washer (26) to prevent crude oil emulsion from leaking outside simultaneously, be provided with emulsion entrance (24) in the bottom of breakdown of emulsion box housing (25), be provided with emulsion outlet (30) on the top of breakdown of emulsion box housing (25).
The present embodiment by using electric heating equipment (2) and thermometer (6), can regulate emulsification of crude oil liquid temp; Can by the crude oil emulsion using high shear dispersion machine (3) preparation different water cut and different stability to require; By changing the delivery rate of emulsion volume pump (5), the residence time of emulsion in breakdown of emulsion box (8) can be regulated; Can output signal, for breakdown of emulsion box (8) provides dissimilar electric field environment by regulating high-voltage power supply (13); By adding the emulsion breaker of different types of emulsion breaker or variable concentrations, the impact of emulsion breaker on crude oil emulsion breaking emulsion and dewatering performance can be probed into; The data obtained provides strong theoretical foundation to for production run.
Embodiment two:
Present embodiment and embodiment one are unlike the mode using crude oil emulsion dynamic breaking emulsion and dewatering characteristic Fast Evaluation device, and concrete steps are as follows:
1, proportionally crude oil, water, emulsifying agent are put into emulsion gravitation tank (1), after making mixed liquor maintain design temperature by electric heating equipment (2), high speed shear dispersion machine (3) is used to carry out shear agitation to mixed liquor, to make the crude oil emulsion of different water cut and different degree of stability.
2, after crude oil emulsion has been prepared, open emulsion volume pump (5), with the flow set, crude oil emulsion is pumped into breakdown of emulsion box (8), until crude oil emulsion after steady flow in Fast Evaluation device, by regulating three-way valve (11), crude oil emulsion through electric field action is returned in emulsion recycling can (12), open high-voltage power supply (13), oscillograph (17) subsequently successively, for breakdown of emulsion box (8) applies high-voltage electric field, to carry out breaking emulsion and dewatering to flowing crude oil emulsion wherein.
3, after front sample tap (7) takes a morsel crude oil emulsion sample, the hydraulic detention time corresponding to different in flow rate, the crude oil emulsion sample after a certain interval after rear sample tap (10) place takes a morsel breakdown of emulsion.
4, front sample tap (7), rear sample tap (10) institute sample thief is combined, by surveying instrument, analysis and characterization is carried out to disperse phase particle water particle diameter, emulsion stability etc. in crude oil emulsion, evaluate the effect of crude oil emulsion electric field breaking emulsion and dewatering from quantitative angle; Also can carry out centrifugal treating by centrifugal separator to crude oil emulsion sample, evaluate breaking emulsion and dewatering effect by the dehydrating amount after contrast centrifuging.
5, after experiment terminates, first by emptying for the crude oil emulsion in device, appropriate clean-out system is poured in emulsion gravitation tank (1), open emulsion volume pump (5), by regulating T-valve (4), (11) before and after breakdown of emulsion box (8), it is made back and forth to flow at emulsion gravitation tank (1), breakdown of emulsion box (8), emulsion recycling can (12) Inner eycle, the cleaning of quick finishing device.Other is identical with embodiment one.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (9)
1. a crude oil emulsion dynamic breaking emulsion and dewatering characteristic Fast Evaluation device, it is characterized in that, comprise emulsion gravitation tank (1), electric heating equipment (2), high speed shear dispersion machine (3), emulsion volume pump (5), thermometer (6), breakdown of emulsion box (8), emulsion recycling can (12), emulsion breaker gravitation tank (18), dosing pump (19), high-voltage power supply (13), oscillograph (17);
Described emulsion gravitation tank (1) is connected by the entrance of T-valve (4) with described emulsion volume pump (5) with emulsion recycling can (12), the outlet of described emulsion volume pump (5) connects breakdown of emulsion box entrance (24), and breakdown of emulsion box outlet (30) is connected with emulsion recycling can (12) with described emulsion gravitation tank (1) by T-valve (11);
The entrance pipe of described breakdown of emulsion box (8) and export pipeline are respectively equipped with front sample tap (7) and rear sample tap (10), described emulsion breaker gravitation tank (18) is connected with the entrance of described dosing pump (19), and the outlet of described dosing pump (19) is connected with the entrance pipe of described breakdown of emulsion box (8) before described front sample tap (7) by gate valve (20).
2. crude oil emulsion according to claim 1 dynamic breaking emulsion and dewatering characteristic Fast Evaluation device, it is characterized in that, described high-voltage power supply (13) and oscillograph (17) are interconnected, and described high-voltage power supply (13) is connected with described breakdown of emulsion box high-pressure side (14).
3. crude oil emulsion according to claim 2 dynamic breaking emulsion and dewatering characteristic Fast Evaluation device, it is characterized in that, in described emulsion gravitation tank (1), described electric heating equipment (2) is installed, the export pipeline of described emulsion gravitation tank (1) is provided with described thermometer (6), the export pipeline of described emulsion gravitation tank (1) is provided with the hot equipment of companion.
4. crude oil emulsion according to claim 3 dynamic breaking emulsion and dewatering characteristic Fast Evaluation device, it is characterized in that, described breakdown of emulsion box (8) comprises breakdown of emulsion box housing (25), left side end cap (21) and right side end cap (29), described left side end cap (21), be bolted between right side end cap (29) and breakdown of emulsion box housing (25), and be provided with packing washer (26), described left side end cap (21) and right side end cap (29) are fixed with low tension pole plate (23) and electrode plate with high voltage (27) respectively, the bottom of described breakdown of emulsion box housing (25) and top are respectively equipped with breakdown of emulsion box entrance (21) and breakdown of emulsion box outlet (30).
5. crude oil emulsion according to claim 4 dynamic breaking emulsion and dewatering characteristic Fast Evaluation device, it is characterized in that, the surface of described electrode plate with high voltage (27) and low tension pole plate (23) is coated with insulation course (28 respectively, 22), and use insulating material respectively by described electrode plate with high voltage (27) and low tension pole plate (23) and described right side end cap (29), left side end cap (21) is cast into an entirety, described electrode plate with high voltage (27), low tension pole plate (23) is respectively by breakdown of emulsion box high-pressure side (14), breakdown of emulsion box low pressure end (9) is connected with the external world, and, described electrode plate with high voltage (27), low tension pole plate (23) and breakdown of emulsion box housing (25) surround rectangle tortuous flow path (31) jointly.
6. crude oil emulsion according to claim 5 dynamic breaking emulsion and dewatering characteristic Fast Evaluation device, it is characterized in that, described emulsion gravitation tank (1), emulsion recycling can (12) and breakdown of emulsion box housing (25) are transparent material.
7. crude oil emulsion according to claim 6 dynamic breaking emulsion and dewatering characteristic Fast Evaluation device, is characterized in that, whole evaluating apparatus is the portable skid structure be placed in box-type shell, and is provided with display touch-screen.
8. application rights requires that the crude oil emulsion dynamic breaking emulsion and dewatering apparatus for evaluating characteristics described in 1 to 7 any one realizes an evaluation method for the dynamic breaking emulsion and dewatering characteristic of crude oil emulsion, it is characterized in that, comprises step:
A, proportionally crude oil, water, emulsifying agent are put into emulsion gravitation tank (1), after making mixed liquor maintain design temperature by electric heating equipment (2), high speed shear dispersion machine (3) is used to carry out shear agitation to mixed liquor, to make the crude oil emulsion of different degree of stability;
After B, crude oil emulsion have been prepared, open emulsion volume pump (5), with the flow velocity set, crude oil emulsion is pumped into breakdown of emulsion box (8), until crude oil emulsion after steady flow in Fast Evaluation device, by regulating three-way valve (11), crude oil emulsion through electric field action is squeezed in emulsion recycling can (12), open high-voltage power supply (13), oscillograph (17) subsequently successively, for breakdown of emulsion box (8) applies high-voltage electric field, to carry out electric field breaking emulsion and dewatering to flowing crude oil emulsion wherein;
C, after front sample tap (7) takes a morsel crude oil emulsion sample, the hydraulic detention time corresponding to different in flow rate, the crude oil emulsion sample after a certain interval after rear sample tap (10) place takes a morsel breakdown of emulsion;
D, the front sample tap of combination (7), rear sample tap (10) institute sample thief, by surveying instrument, analysis and characterization is carried out to disperse phase particle water particle diameter, emulsion stability etc. in crude oil emulsion, evaluate the effect of crude oil emulsion electric field breaking emulsion and dewatering from quantitative angle; Also can carry out centrifugal treating by centrifugal separator to crude oil emulsion sample, evaluate breaking emulsion and dewatering effect by the dehydrating amount after contrast centrifuging;
After E, experiment terminate, first by emptying for the crude oil emulsion in device, appropriate clean-out system is poured in emulsion gravitation tank (1), open emulsion volume pump (5), by regulating T-valve (4), (11) before and after breakdown of emulsion box (8), it is made back and forth to flow at emulsion gravitation tank (1), breakdown of emulsion box (8), emulsion recycling can (12) Inner eycle, the cleaning of quick finishing device.
9. the evaluation method of the dynamic breaking emulsion and dewatering characteristic of crude oil emulsion according to claim 8, it is characterized in that, in described step B, until crude oil emulsion after steady flow in Fast Evaluation device, except use electric field breakdown of emulsion, can also use on the pipeline of dosing pump (19) between front sample tap (7) and breakdown of emulsion box (8) and inject emulsion breaker, under emulsion breaker independent role or " electric field+emulsion breaker " acting in conjunction, Fast Evaluation can also be carried out to its breaking emulsion and dewatering characteristic;
Before and after in described step C, sample tap sampling interval time should be corresponding with the emulsion electric field action time, makes experimental data more credible by measuring the crude oil emulsion of same batch of contrast as far as possible;
In the process that described step D characterizes sample analysis, can the data such as disperse phase particle water particle diameter, emulsion stability, centrifugal dehydration rate in independent measurement crude oil emulsion, also can by several characterization method conbined usage.
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