CN110454126A - Imbibition, which is recovered the oil, uses imbibition agent evaluation experimental device and method - Google Patents
Imbibition, which is recovered the oil, uses imbibition agent evaluation experimental device and method Download PDFInfo
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- CN110454126A CN110454126A CN201910802792.7A CN201910802792A CN110454126A CN 110454126 A CN110454126 A CN 110454126A CN 201910802792 A CN201910802792 A CN 201910802792A CN 110454126 A CN110454126 A CN 110454126A
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- imbibition
- oil
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- bottle
- plug
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Abstract
The invention discloses a kind of imbibition oil recovery imbibition agent evaluation experimental device and methods, the device includes imbibition bottle and imbibition pipe, the top of the imbibition bottle has graded tube, import is provided with below the bottle body of the imbibition bottle, the imbibition pipe includes hollow tube body, for the plug at closed tube both ends and setting in the intracorporal porous gasket of pipe, the diameter of porous gasket is identical with internal diameter of tube body, the plug includes cover plate and the boss that is fixed on cover plate, fastening bolt holes and oil outlet are provided on the cover plate, oil outlet is connected to oil discharge passage, oil discharge passage is arranged inside plug, the boss plug is in tube body, the boss outer diameter size is identical as internal diameter of tube body size.It is easy to operate the present invention provides a kind of at low cost, it can heat, reproducible, experimental period, short and visual imbibition agent evaluation experimental device and method, provided platform for imbibition agent screening and assessment and imbibition oil recovery law study.
Description
Technical field
The present invention relates to imbibition oil recovery technique fields, recover the oil more particularly to imbibition and use imbibition agent evaluation experimental device and side
Method.
Background technique
In recent years, due in worldwide petroleum resources demand be constantly increasing, hyposmosis densification petroleum resources are already
As important component indispensable in global energy structure, status is outstanding day by day.China's hyposmosis rich reserves, distribution
In each oily area in the whole nation, more than 50 hundred million tons of oil in place are verified at present, wherein sandstone oil field accounts for 70%, and other particular lithologic oil fields account for
30%.Compared with conventional oil reservoir, the fine and close oily reservoir porosity of hyposmosis is small, permeability is low, often difficult using conventional waterflooding exploitation
To obtain preferable effect, imbibition oil recovery is one of main developing technology of low-permeability oil deposit.Pass through capillary force in porous media
Effect and the wetting phase that generates is called imbibition to the displacement effect of non-wetted phase, since LOW PERMEABILITY RESERVOIR pore throat is tiny, capillary force
Height, spontaneous imbibition effect is its important oil recovery mechanism.
Imbibition agent is a kind of chemical agent to recover the oil for imbibition, and it includes numerous species, currently, in imbibition agent and its system
Which specific index can more influence imbibition oil recovery effect and not obtain unified understanding.Therefore, scholars are still continuous
The factor and rule that influence imbibition effect are in depth studied and explore, the index generally examined has wettability reversal ability, contact
Angle variation, oil-sand imbibition efficiency and rock core imbibition efficiency etc..
It usually will do it core experiment when screening and evaluating imbibition agent, but since core experiment is surveyed from basic data
Examination, saturated oils get off to need to last 2 to 3 months even for more time to aging and imbibition experiment whole cycle, so from cost
Time on consider, core experiment be not suitable for evaluate and screen imbibition agent.
The research method of existing imbibition experimental provision is mainly volumetric method and two kinds of mass method simultaneously, and volumetric method is to pass through
The volume of measurement crude oil or imbibition system solution passes through to calculate the liquid displacement amount between solution and rock core and records imbibition oil recovery
Amount changes with time, and calculates recovery percent of reserves, so that oil displacement efficiency is evaluated, and weight method is by measurement rock core or imbibition system
The weight change situation of solution calculates imbibition result.Volumetric method is used for the biggish imbibition of rock pore volume, can be well
Imbibition is observed as a result, the automatic weighing precision of the electronics of weight method is higher, the variation of weight can be recorded at any time.
But the experimental provision of current above two method is tested using rock core, and rock core is not only expensive, and
And it is long period, less reproducible, and after the completion of testing, it is desirable to see that the imbibition effect inside rock core is also relatively difficult,
Therefore rule of recovering the oil for the screening and imbibition of imbibition agent is not appropriate for using the experimental provision that rock core is tested at present
Research.
And the experiment condition of existing imbibition experimental provision is mostly normal temperature and pressure, can not preferably simulate certain temperature item
The imbibition of stratum host rock under part acts on, and the measurement result of the imbibition instrument of normal temperature and pressure is caused to be deposited with true strata condition
In different.And existing high temperature and pressure imbibition extracting device of oil, experiment condition are more harsh, experimental period is longer, experiment behaviour
Make more complex.
For the deficiency of existing experimental provision, it is necessary to explore it is a kind of at low cost, it is easy to operate, can heat, it is reproducible, it is real
Period short and visual imbibition experimental provision is tested, provides platform for imbibition agent screening and imbibition oil recovery law study.
Summary of the invention
It is easy to operate the present invention provides a kind of at low cost in view of this, in view of the above shortcomings of the prior art, it can heat,
Reproducible, experimental period, short and visual imbibition agent evaluation experimental device and method, was adopted for imbibition agent screening and assessment and imbibition
Oily law study provides platform.
In order to solve the above technical problems, technical solution of the present invention provides firstly a kind of imbibition oil recovery imbibition agent evaluation
Experimental provision, it includes imbibition bottle and imbibition pipe, and the top of the imbibition bottle has graded tube, the bottle body lower section of the imbibition bottle
It is provided with import, the imbibition pipe includes that hollow tube body, the plug for closed tube both ends and setting are intracorporal porous in pipe
The diameter of gasket, porous gasket is identical with internal diameter of tube body, and the plug includes cover plate and the boss that is fixed on cover plate, described
Fastening bolt holes and oil outlet are provided on cover plate, oil outlet is connected to oil discharge passage, and oil discharge passage is arranged inside plug, institute
Boss plug is stated in tube body, the boss outer diameter size is identical as internal diameter of tube body size.
Further, the imbibition bottle nonmetallic materials production transparent using heat resisting and pressure resisting；The tube body of the imbibition pipe
Using the nonmetallic materials production that heat resisting and pressure resisting is transparent, the specially glass material of heat resisting and pressure resisting, facilitate imbibition experiment effect
Observation and the experimental temperature for bearing target reservoir make to test closer to target reservoir condition, and experimental result is relatively reliable.
Further, the surface of the imbibition bottle and imbibition pipe is provided with oleophobic layer.The oleophobic layer is set as existing skill
Art can be realized by the way that oleophobic ingredient is added in making material, and the setting of oleophobic layer can further improve the standard of experimental result
True property.
Further, the bottle body import of the imbibition bottle is sealed using thread sealed closure, and sealing means production is simple, behaviour
Make easy, sealed reliable.
Further, it there are three the fastening bolt holes are angularly equidistantly positioned using cover plate center as the center of circle, ensure that
The sealing of both ends plug is fixed.
Further, sealing ring is offered on the boss, is sealed and is cased with sealing ring in ring.More optimizedly, described
Sealing ring offers two or more on boss.The setting can further strengthen the leakproofness at imbibition pipe tube body both ends.
Meanwhile the present invention also provides carry out the experiment side that imbibition oil recovery is evaluated with imbibition agent using above-mentioned experimental provision
Method, specifically include the following steps:
(1) imbibition pipe one end installs porous gasket and plug, and porous Jie of certain partial size is packed into from the imbibition pipe other end
Matter puts into a centrifuge after being centrifuged 20min under 3600r/min centrifugation rate, fills into again into imbibition pipe more to graduation mark
Hole medium installs the porous gasket and plug of the other end, the corresponding fastening bolt of plug at imbibition pipe both ends to graduation mark
Anchorage bar is penetrated in hole, fastening nut is inserted on anchorage bar and is sealed fixation, then weighs imbibition pipe weight m0；It is described porous
Medium is preferably quartz sand；
(2) it with the gas permeability of porous media in gas permeameter detection imbibition pipe, is surveyed according to gas permeameter
The relevant parameter obtained, the gas permeability K of porous media in imbibition pipe is calculated using Darcy formulag；Gas permeameter
Have many advantages, such as that structure is simple and convenient to operate, finding speed is fast, precision is high, be the indispensable experimental provision of conventional core analysis,
Belong to the prior art, experimental principle, operating method and experimental procedure, those skilled in the art are fully aware of, herein no longer
It is described in detail；
(3) oil outlet of imbibition pipe outlet end is closed, is infused with the speed of 1ml/min from the oil outlet of imbibition pipe input end
Enter salt water until imbibition pipe in inject salt water reach saturation, do not reabsorb salt water in imbibition pipe, then proceed to inject salt water
5min, the imbibition pipe weight m after weighing saturated brine later1, the pore volume PV=(m of porous media is calculated1-m0)/
ρSalt water, ρSalt waterFor the density for injecting salt water under room temperature；
(4) oil outlet of imbibition pipe outlet end is opened, with salt water by 3-5 times of hole of porous media displacement in imbibition pipe
Volume PV specially opens the oil outlet of imbibition pipe outlet end, with the going out from imbibition pipe input end of the speed not higher than 3ml/min
Hydraulic fluid port injects salt water, until the pressure curve of injection end is steady, and injection fluid volume is 3-5 PV, records imbibition pipe
The final pressure (i.e. final displacement pressure) of outlet end is surveyed using the water that porous media in imbibition pipe is calculated in Darcy formula
Permeability KH；
(5) by after the temperature of heating crude oil to simulation oil reservoir, with the speed of 0.5ml/min from the fuel-displaced of imbibition pipe input end
Crude oil after mouth injection heating is until imbibition pipe outlet oil outlet flows out crude oil, and measurement imbibition pipe outlet end oil outlet is in total
Water yield VWater, calculate oil saturation Soi=(VWater/ PV) × 100%；
(6) oil outlet for closing imbibition pipe import and export end takes down imbibition pipe two at a temperature of simulating oil reservoir after aging 15d
Its transverse direction is put into imbibition bottle by the plug at end, and imbibition agent to be screened is packed into imbibition bottle, covers thread sealed closure sealing, note
The scale value that imbibition agent reaches is recorded, then imbibition bottle is placed at a temperature of simulation oil reservoir and is tested, records imbibition pipe every 2h
The crude oil volume of interior precipitation records bulking value V until crude oil volume is precipitated and no longer changesOil, calculating imbibition recovery ratio=
(VOil/VWater) × 100%；
The inlet end and an outlet end of above-mentioned imbibition pipe does not limit specific direction.
Crude oil after porous media and aging is put into imbibition pipe by the above method can preferably simulate certain temperature item
The imbibition of stratum host rock under part acts on, and the inspection of permeability and imbibition recovery ratio data is surveyed by gas permeability, water
Survey, it can be determined that imbibition effect of different imbibition agent under the conditions of target reservoir, for imbibition agent screening provide it is relatively reliable
Data.Gas permeability KgPermeability K is surveyed with waterHDetection ensure that the consistency of each experiment condition of imbibition agent screening experiment,
Avoid the Different Effects the selection result of experiment condition；The operation of imbibition pipe aging 15d can make porous media and crude oil better
Close to the formation conditions of simulation, the reliability of imbibition agent screening is improved.
Compared with prior art, imbibition provided by the invention, which is recovered the oil, uses imbibition agent evaluation experimental device, can be at high temperature
Imbibition oil recovery experiment is carried out, the imbibition effect of the stratum host rock under the conditions of certain temperature, imbibition effect can be preferably simulated
Fruit is visual, while this experimental provision replaces rock core to be tested with crude oil after porous media and aging, not only at low cost, and
And the time of test screen can be greatly shortened, shorten experimental period, therefore experimental provision provided by the invention and experimental method
It can be used for the screening and assessment of imbibition agent, provide platform for imbibition agent screening and the research of imbibition oil recovery rule.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of experimental provision of the present invention；
Fig. 2 is the structural schematic diagram of imbibition pipe of the present invention；
Fig. 3 is the structural schematic diagram of plug of the present invention；
Fig. 4 is the structural schematic diagram of porous gasket of the present invention.
Marked in the figure:
1- imbibition bottle, 11- graded tube, 12- import, 13- thread sealed closure；
2- imbibition pipe, 21- tube body, 22- plug, 23- porous gasket,
221- cover plate, 222- boss, 223- fastening bolt holes, 224- oil outlet, 225- oil discharge passage, 226- sealing ring
Ring, 227- sealing ring；
3- anchorage bar, 4- fastening nut.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to make those skilled in the art more fully understand technical solution of the present invention
Applying mode, the present invention is described in further detail.In the description of the present invention, it is to be understood that, term " on ", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "top", "bottom", "inner", "outside" is based on the figure
Orientation or positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
Referring to Fig. 1 to Fig. 4, the present invention provides a kind of imbibition oil recovery imbibition agent evaluation experimental devices, it includes imbibition
Bottle 1 and imbibition pipe 2, the top of the imbibition bottle 1 have graded tube 11, are provided with import 12 below the bottle body of the imbibition bottle 1, into
Mouth 12 is sealed using thread sealed closure 13；
The imbibition pipe 2 includes that hollow tube body 21, the plug 22 for closed tube both ends and setting are intracorporal in pipe
Porous gasket 23, the diameter of porous gasket 23 is identical with the internal diameter of tube body 21, and the plug 22 includes cover plate 221 and is fixed on
Boss 222 on cover plate 221, is provided with fastening bolt holes 223 and oil outlet 224 on the cover plate 221, oil outlet 224 with go out
Oily channel 225 is connected to, and oil discharge passage 225 is arranged inside plug 22, and the plug of boss 222 is in tube body 21, the boss 222
Outer diameter size it is identical as the inner diameter size of tube body 21.The fastening bolt holes 223 using the center of cover plate 221 as the center of circle angularly
There are three being equidistantly positioned, to ensure that the sealing of both ends plug is fixed；Sealing ring 226 is offered on the boss 222,
It is cased with sealing ring 227 in sealing ring 226, more optimizedly, the sealing ring offers two or more on boss, the setting
The leakproofness at imbibition pipe tube body both ends can be further strengthened.
Further, the imbibition bottle nonmetallic materials production transparent using heat resisting and pressure resisting；The tube body of the imbibition pipe
Using the nonmetallic materials production that heat resisting and pressure resisting is transparent, the specially glass material of heat resisting and pressure resisting, facilitate imbibition experiment effect
Observation and the experimental temperature and pressure for bearing target reservoir make to test closer to target reservoir condition, and experimental result more may be used
It leans on.
Further, the surface of the imbibition bottle and imbibition pipe is provided with oleophobic layer.The oleophobic layer is set as existing skill
Art can be realized by the way that oleophobic ingredient is added in making material, and the setting of oleophobic layer can further improve the standard of experimental result
True property.
Illustrate the application method of experimental provision of the present invention, the temperature of following embodiment simulation oil reservoirs with specific embodiment below
Degree condition is 70 DEG C, the imbibition agent for carrying out screening experiment is imbibition the agent SX-1, SX-2 of Shanghai Yu Qing Chemical Co., Ltd. production
And SX-3.
It is described that the specific operation method is as follows:
(1) as shown in Fig. 2, installing porous gasket 23 and plug 22 to by one end of imbibition pipe, from the imbibition pipe other end
Being packed into partial size is the quartz sand of 160-180 mesh to graduation mark, puts into a centrifuge and is centrifuged under 3600r/min centrifugation rate
After 20min, filling into partial size into imbibition pipe again is the quartz sand of 160-180 mesh to graduation mark, installs the porous of the other end
Gasket 23 and plug 22 penetrate anchorage bar 3 in the corresponding fastening bolt holes 223 of the plug at imbibition pipe both ends, cover on anchorage bar 3
Enter fastening nut 4 and be sealed fixation, then weighs imbibition pipe weight m0=77.31g；
(2) it with the gas permeability of porous media in gas permeameter detection imbibition pipe, is surveyed according to gas permeameter
The relevant parameter obtained, the gas permeability K of porous media in imbibition pipe is calculated using Darcy formulagIt is 282.6 × 10-3μ
m2；
(3) oil outlet of imbibition pipe outlet end is closed, is infused with the speed of 1ml/min from the oil outlet of imbibition pipe input end
Enter salt water until imbibition pipe in inject salt water reach saturation, do not reabsorb salt water in imbibition pipe, then proceed to inject salt water
5min, the density for injecting salt water is ρSalt water=1.02g/cm-3, imbibition pipe weight m after weighing saturated brine later1=83.49g,
Pore volume PV=(the m of porous media is calculated1-m0)/ρSalt water=6.05ml；
(4) oil outlet of imbibition pipe outlet end is opened, with salt water by 3-5 times of hole of porous media displacement in imbibition pipe
Volume PV specially opens the oil outlet of imbibition pipe outlet end, with the going out from imbibition pipe input end of the speed not higher than 3ml/min
Hydraulic fluid port injects salt water, until the pressure curve of injection end is steady, and injection fluid volume is 3-5 PV, records imbibition pipe
The final pressure of outlet end surveys permeability K using the water that porous media in imbibition pipe is calculated in Darcy formulaHIt is 192.5 μm2；
(5) by heating crude oil to after simulating oil reservoir temperature 70 C, with the speed of 0.5ml/min going out from imbibition pipe input end
Crude oil after hydraulic fluid port injection heating is until imbibition pipe outlet oil outlet outflow crude oil, measures the total of imbibition pipe outlet end oil outlet
Water yield V altogetherWater=5.2ml calculates oil saturation Soi=(VWater/ PV) × 100%=85.9%；
(6) oil outlet for closing imbibition pipe import and export end takes down imbibition pipe two at a temperature of simulating oil reservoir after aging 15d
Its transverse direction is put into imbibition bottle (being laterally put into avoids gravity from influencing) by the plug at end, and imbibition agent to be screened is packed into imbibition bottle
SX-1, covers thread sealed closure sealing, then imbibition bottle is placed at a temperature of simulation oil reservoir by the scale value that record imbibition agent reaches
It is tested, every the crude oil volume being precipitated in 2h record imbibition pipe until crude oil volume is precipitated and no longer changes, body after 38h
Product no longer changes, and records bulking value VOil=2.35mL calculates imbibition recovery ratio=(VOil/VWater) × 100%=45.2%.
The fuel-displaced rate of the method for the present invention imbibition is very fast, through the present inventor's many experiments, finds the method for the present invention generally in 1-
2d can complete imbibition condensate oil, and crude oil volume is precipitated and no longer changes, experimental period is greatly saved, alleviates the work of experimenter
Make intensity.
The experiment of imbibition agent SX-2 and SX-3 repeats the step of above-mentioned (1) to (6), specific data as shown in the table below:
Gas permeability KgPermeability K is surveyed with waterHDetection ensure that the basic of each experiment condition of imbibition agent screening experiment
Unanimously, the Different Effects the selection result of experiment condition is avoided；As can be seen from the above table, the imbibition effect of SX-1 is best.
It is described in detail below below with the selection result of existing core experiment method validation aforementioned present invention method:
(1) rock core of target reservoir, size Φ 2.5*10cm are chosen according to requirement of experiment.
(2) according to requirement of experiment, carry out washing oil and drying to rock core, and measure the size of rock core: diameter and length (measure
3 times or more), and weigh the weight M after rock core drying0=99.37g.
(3) with the gas permeability of gas permeameter detection rock core, the relevant parameter measured according to gas permeameter,
The gas permeability K of rock core is calculated using Darcy formulagIt is 19.2 × 10-3μm2；
(4) rock core vacuumizing, pressure need to keep reaching -0.09MPa or so, then evacuated time 6h is loaded into rock
Salt water (brine density 1.02g/cm is injected in heart clamp holder-3) to salt water saturation, the rock core after saturated brine is placed on electronics day
Its weight M is weighed on flat1=103.34g calculates the pore volume PV=(M of rock core1-M0)/ρSalt water=3.89mL；
(5) open core holding unit outlet valve, with salt water by 3-5 times of pore volume PV of rock core displacement, specially with
Speed not higher than 3ml/min injects salt water from the import of core holding unit, until the pressure curve of injection end is steady, and injects
Until fluid volume is 3-5 PV, the pressure of outlet port of rock core holder is recorded, rock core water is calculated using Darcy formula and surveys
Permeability KHIt is 11.6 × 10-3μm2；
(6) by after heating crude oil to simulation oil reservoir temperature 70 C, with the speed of 0.5ml/min from the import of core holding unit
Crude oil after injection heating is until clamper outlet outflow crude oil, the water yield V in total of measurement clamper outletWater=1.92ml,
Calculate oil saturation Soi=(VWater/ PV) × 100%=49.3%；
(7) by rock core preservative film and rubber belt sealing, at a temperature of simulating oil reservoir after aging 15d, removal of core is put
Enter in imbibition bottle, imbibition agent SX-1 to be screened is packed into imbibition bottle, cover thread sealed closure sealing, record imbibition agent reaches
Scale value, every the crude oil volume being precipitated in 12h record rock core, (rock core imbibition is fast until crude oil volume is precipitated and no longer changes
Rate is slow, and the imbibition time will could generally complete imbibition condensate oil in 10-15d), crude oil volume is precipitated after 13 days half and no longer changes,
Record bulking value VOil=0.41mL calculates imbibition recovery ratio=VOil/VWater× 100%=21.3%.
The experiment of imbibition agent SX-2 and SX-3 repeats the step of above-mentioned (1) to (7), specific data as shown in the table below:
The imbibition effect that above-mentioned core experiment also demonstrates SX-1 is best, consistent with experimental result of the present invention.
In conclusion imbibition provided by the invention, which is recovered the oil, uses imbibition agent evaluation experimental device, can be seeped at high temperature
Experiment of recovering the oil to be inhaled, the imbibition effect of the stratum host rock under the conditions of certain temperature can be preferably simulated, imbibition effect is visual,
This experimental provision replaces rock core to be tested simultaneously with the crude oil after porous media and aging, screens and obtains in this experimental provision
The optimal imbibition agent obtained is consistent with the optimal imbibition agent screened in rock core, not only at low cost, but also can greatly shorten test
The time of screening shortens experimental period, therefore experimental provision provided by the invention and experimental method can be used for the screening of imbibition agent
Evaluation provides platform for imbibition agent screening and the research of imbibition oil recovery rule.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, for this field skill
For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from spirit of the invention or
In the case where essential characteristic, the present invention can be realized in other specific forms；Therefore, in all respects, should all incite somebody to action
Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state
Bright restriction, it is intended that including all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention
Interior, any reference signs in the claims should not be construed as limiting the involved claims.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. imbibition, which is recovered the oil, uses imbibition agent evaluation experimental device, it is characterised in that: including imbibition bottle and imbibition pipe, the imbibition bottle
Top has graded tube, is provided with import below the bottle body of the imbibition bottle, the imbibition pipe includes hollow tube body, for closing
The plug at tube body both ends and setting are in the intracorporal porous gasket of pipe, and the diameter of porous gasket is identical with internal diameter of tube body, the plug
Including cover plate and the boss being fixed on cover plate, be provided with fastening bolt holes and oil outlet on the cover plate, oil outlet with go out
Oily channel connection, oil discharge passage are arranged inside plug, and the boss plug is in tube body, in the boss outer diameter size and tube body
Diameter size is identical.
2. imbibition according to claim 1, which is recovered the oil, uses imbibition agent evaluation experimental device, it is characterised in that: the imbibition bottle is adopted
With the nonmetallic materials production that heat resisting and pressure resisting is transparent.
3. imbibition according to claim 1, which is recovered the oil, uses imbibition agent evaluation experimental device, it is characterised in that: the imbibition pipe
The tube body nonmetallic materials production transparent using heat resisting and pressure resisting.
4. imbibition according to claim 1, which is recovered the oil, uses imbibition agent evaluation experimental device, it is characterised in that: the imbibition bottle and
The surface of imbibition pipe is provided with oleophobic layer.
5. imbibition according to claim 1, which is recovered the oil, uses imbibition agent evaluation experimental device, it is characterised in that: the imbibition bottle
Bottle body import is sealed using thread sealed closure.
6. imbibition according to claim 1, which is recovered the oil, uses imbibition agent evaluation experimental device, it is characterised in that: the fastening bolt
There are three hole is angularly equidistantly positioned using cover plate center as the center of circle.
7. imbibition according to claim 1, which is recovered the oil, uses imbibition agent evaluation experimental device and method, it is characterised in that: described convex
Sealing ring is offered on platform, is sealed and is cased with sealing ring in ring.
8. imbibition according to claim 7, which is recovered the oil, uses imbibition agent evaluation experimental device and method, it is characterised in that: described close
Seal ring offers two or more on boss.
9. carrying out the experiment side that imbibition is recovered the oil with imbibition agent evaluation using experimental provision described in any item of the claim 1 to 8
Method, it is characterised in that: include the following steps:
(1) imbibition pipe one end installs porous gasket and plug, from imbibition pipe other end loading porous media to graduation mark,
After 3600r/min centrifugation rate is centrifuged 20min, porous media is filled into imbibition pipe again to graduation mark, installs the other end
Porous gasket and plug, penetrate anchorage bar in the corresponding fastening bolt holes of plug at imbibition pipe both ends, be inserted on anchorage bar
Fastening nut is sealed fixation, weighs imbibition pipe weight m0；
(2) it with the gas permeability of porous media in gas permeameter detection imbibition pipe, is measured according to gas permeameter
The gas permeability K of porous media in imbibition pipe is calculated using Darcy formula for relevant parameterg；
(3) oil outlet of imbibition pipe outlet end is closed, salt is injected from the oil outlet of imbibition pipe input end with the speed of 1ml/min
Water continues to inject 5min, the imbibition pipe weight m after then weighing saturated brine until saturation1, calculate the pore-body of porous media
Product PV=(m1-m0)/ρSalt water, ρSalt waterFor the density for injecting salt water under room temperature；
(4) oil outlet of imbibition pipe outlet end is opened, with salt water by 3-5 times of pore volume of porous media displacement in imbibition pipe
PV records final displacement pressure, surveys permeability K using the water that porous media in imbibition pipe is calculated in Darcy formulaH；
(5) it by after the temperature of heating crude oil to simulation oil reservoir, is infused with the speed of 0.5ml/min from the oil outlet of imbibition pipe input end
Until the oil outlet of imbibition pipe outlet end flows out crude oil, measurement imbibition pipe outlet end oil outlet goes out crude oil after entering heating in total
Water VWater, calculate oil saturation So i=(VWater/ PV) × 100%；
(6) oil outlet at imbibition pipe import and export end is closed, then aging 15d at a temperature of simulating oil reservoir takes down imbibition pipe both ends
Plug its transverse direction is put into imbibition bottle, imbibition agent to be screened is packed into imbibition bottle, covers thread sealed closure sealing, record
Then imbibition bottle is placed at a temperature of simulation oil reservoir and tests by the scale value that imbibition agent reaches, every in 2h record imbibition pipe
The crude oil volume of precipitation records bulking value V until crude oil volume is precipitated and no longer changesOil, calculating imbibition recovery ratio=
(VOil/VWater) × 100%；
The inlet end and an outlet end of above-mentioned imbibition pipe does not limit specific direction.
The experimental method evaluated with imbibition agent 10. imbibition according to claim 9 is recovered the oil, it is characterised in that: described porous
Medium is quartz sand.
Priority Applications (1)
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| CN114167035A (en) * | 2021-12-14 | 2022-03-11 | 西安石油大学 | Novel water absorption and oil discharge device and oil displacement efficiency measuring method |
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