CN109932233A - Rapidly and efficiently washing oil method and device for washing oil - Google Patents
Rapidly and efficiently washing oil method and device for washing oil Download PDFInfo
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- CN109932233A CN109932233A CN201910160436.XA CN201910160436A CN109932233A CN 109932233 A CN109932233 A CN 109932233A CN 201910160436 A CN201910160436 A CN 201910160436A CN 109932233 A CN109932233 A CN 109932233A
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Abstract
A kind of rapidly and efficiently washing oil method and device for washing oil, washing oil method are rock core needed for natural rock sample to be processed into experiment；Rock core is put into the vessel in heating washing oil for filling detergent；Rock core is installed to displacement of reservoir oil process by detergent displacement crude oil, establishes washing oil channel；Rock core is placed on by the detergent washing oil of heating in device for washing oil, then rock core is put into dryer and is dried, recycles the operation, until reaching washing oil criterion of acceptability；Rock core is dried in device for washing oil high temperature；Device for washing oil includes the detergent room for being placed with detergent, pipeline connection is passed sequentially through between detergent room, rock core purge chamber, condenser pipe, condensate liquid storeroom and rock core purge chamber, condenser pipe is connected to circulating refrigerating device, and the water in condenser pipe recycles between condenser pipe and circulating refrigerating device.Washing oil method of the present invention is simple and convenient, is greatly improved displacement efficiency, can avoid staff and contacts with detergent, and device for washing oil structure is simple, and washing oil is convenient, and detergent used can be recycled.
Description
Technical field
The present invention relates to the core analysis technical field of petroleum industry more particularly to a kind of pair of natural cores or artificial core
The rapidly and efficiently washing oil method and device for washing oil of washing oil.
Background technique
During In Oil Field Exploration And Development, need through the porosity of the original rock core of test development series of strata, permeability, saturation
The experimental datas such as degree, and then analyze physics, chemical property and the structure feature of testing rock core.Rock core oil washing is In Oil Field Exploration And Development
Essential pre-processing in part Experiment, purpose are exactly to remove rock core Crude Oil and its soluble matter, are conducive to the suitable of experiment
Benefit carries out.
Existing number of patent application 200920228444.5 provides a kind of heating type high-pressure displacement oil washing machine for rock core, mainly
It is that rock core is placed in core holding unit, by constantly rinsing come washing oil, it is well known that for displacement rock core, displacement of reservoir oil effect
The oil displacement efficiency that rate either polymer flooding, polymer/surfactant binary or poly-/table/alkali ternary and mixed phase drive all reaches
Less than 100%, that is the purpose of thorough washing oil is not achieved in this mode.The patent No. 01262466.7 provides a kind of centrifugal
Oil washing machine for rock core is centrifuged rock core oil washing using the axis of rotation, the outflow of washing oil liquid in rock core is made to have certain power and advantage.
Number of patent application 201610857161.1 provides a kind of rock core oil washing instrument, is that device for washing oil is divided into upper layer and lower layer, belongs to
General washing oil is conducive to the discharge of waste liquid.The patent No. 99216879.1 provides a kind of device for washing oil from cores, using
The washing oil mode of room temperature temperature-pressure elutes rock core with the detergent of evaporation, passes through the cleaning solution decrease temperature and pressure from condenser pipe
Washing oil is moved with warm fluid wave.
Above-mentioned rock core oil washing patent without exception be by detergent impregnate or use single detergent displacement rock core, or
Washing oil liquid is thrown away by centrifugation, is had the following problems:
(1) rock core cleaning solution enters rock core internal void from the outside, by capillary imbibition and it is external apply pressure passively with
Rock core Crude Oil contact lysis cements out, and is successively progressive process.It is basic feasible solution for medium to high permeable rate rock core
, but for hypotonic or special low permeability cores, due to hole and venturi all very littles, in no additionaling power, seep
Flow velocity degree is very slow, reaches washing oil effect and needs long time, and is slower in the middle part of rock core；
(2) for rock core by the displacement of washing oil liquid or centrifugation, degree of cleaning is relatively low, and is limited scavenging period by core permeability and prolonged
It is long.Centrifugal washing oil method is limited by core permeability, as the effect of the reduction centrifugation of permeability is a greater impact, especially
It is that oil in the middle part of rock core is difficult to contact and be cleaned with detergent, while being full of air, washing oil liquid in rock core hole after being centrifuged
It being difficult to can smoothly enter into the hole of rock core deep by " Jamin effect " influence, rock core placement is unordered to increase washing oil liquid resistance to outflow,
It is easy to impaired without fixed rock core, especially loose core；
(3) it generally to take out to be placed in high-temperature incubator in washing oil room washing oil rock core up to standard and dry, remove clear in rock core
Washing lotion, this process, which needs to take out in rock core, to be shifted, and may damage rock core, staff can also contact cleaning solution, not to health
Benefit；
(4) recirculated water is for condensing cleaning solution steam, if using tap water as recirculated water, wastage is big, if with closed recirculating,
With the extension of time, water temperature increases, condensation effect is deteriorated, and effect is single.
Therefore, how to design a kind of rapidly and efficiently washing oil method that can be solved the above problems and device for washing oil is the present inventor
The project concentrated on studies.
Summary of the invention
The purpose of the present invention is to provide one kind, rapidly and efficiently washing oil method and device for washing oil, the washing oil method are easy to operate
It is convenient, it is greatly improved the displacement efficiency of rock core, and can avoid staff and contact unhealthful, the device for washing oil with detergent
Structure design is simple, and washing oil process is convenient, and detergent used can be recycled.
To achieve the goals above, the present invention provides a kind of rapidly and efficiently washing oil method, including following steps:
(1) multiple natural rock samples rock core sample preparation: are processed into the rock core of size needed for testing；
(2) rock core preheats: the rock core being put into the heating container for filling detergent, the crude oil in rock core is made to be in flowable
State；
(3) it establishes the washing oil channel of rock core: the rock core is installed to displacement of reservoir oil process, pass through the original in detergent displacement rock core
Oil establishes the washing oil channel of rock core；
(4) device for washing oil washing oil: rock core is placed in device for washing oil through the detergent washing oil of heating, rock core is put into gets rid of later
It is dried in dry machine, recycles the operation, until reaching washing oil criterion of acceptability；
(5) rock core is dried: rock core is dried in device for washing oil high temperature.
Preferably, the rock core in the step (1) includes at least one that diameter is 25mm, 38mm, 100mm, 114mm
Kind column rock core.
Preferably, the detergent in the step (2) be by mass percent be 7:3 methylene chloride and alcohol mixing and
At.
Preferably, the container in the step (2) is heated to reservoir temperature or 50~80 DEG C, and heating time is 2~4h.
Preferably, the displacement of reservoir oil process in the step (3) include the core holding unit that is set in high temperature constant temperature device and
Confining pressure power source, the rock core are installed on core holding unit, and one end of the core holding unit passes through high pressure line and setting
Intermediate receptacle in high temperature constant temperature device is connected to, and is filled with detergent in the intermediate receptacle, the intermediate receptacle passes through high pressure
Pipeline and displacement pump connect, and the other end of the core holding unit is connect by high pressure line with metering device, and the confining pressure is dynamic
Power source exerts a force along the radial direction of rock core, is equipped with pressure gauge or pressure sensor on each high pressure line, each pressure gauge or
Pressure sensor passes through signal wire respectively and connect with computer monitoring device.
Preferably, the outlet port of rock core holder is equipped with back-pressure valve, and the back-pressure valve is installed on the rock core outlet
On the high pressure line for holding connection.
Preferably, in the step (4) from the dryer take out rock core be put into the rock core purge chamber after, first by institute
It states rock core purge chamber to seal and vacuumize 30-60 minutes, fresh detergent pressurizes in injection rock core purge chamber again later.
Preferably, the drying temperature of the step (5) is 105 ± 2 DEG C.
A kind of device for washing oil is placed with detergent, the detergent room including detergent room in the detergent room
Be connected to by pipeline with rock core purge chamber, rock core purge chamber outlet is connected to by pipeline with condenser pipe, the condenser pipe and
Circulating refrigerating device is connected to, and the water in the condenser pipe recycles between condenser pipe and circulating refrigerating device, and the condenser pipe is logical
It crosses pipeline to be connected to condensate liquid storeroom, the condensate liquid storeroom passes through pipeline and rock core purge chamber inlet communication.
Preferably, the detergent room, rock core purge chamber are all made of the pressure vessel of controllable heating function, the detergent
Room, rock core offer observation window in purge chamber respectively.
It preferably, further include rock core frame, the rock core frame includes placed longitudinally connecting plate, is provided on the connecting plate
At least one rock core placement plate being horizontally arranged, multiple rock core placement plates are arranged from top to bottom, and each rock core is put
It sets and is placed with multiple rock cores on plate, multiple rock cores protect baffle to be spaced from each other by rock core, the connecting plate of the rock core frame
It is connect by removable connector with rock core purge chamber.
Preferably, the rock core is longitudinally disposed, and multiple through-holes, multiple rock cores point are provided on the protection baffle
It is not placed through multiple through-holes.
Preferably, the condensate liquid storeroom is connected to by siphon pipe and valve with the detergent room.
Preferably, the bottom of the rock core purge chamber is equipped with oil outlet, and the oil outlet connects high pressure valve.
After adopting the above scheme, rapidly and efficiently washing oil method and device for washing oil have the advantages that the present invention
1, by the way that rock core is put into washing oil in displacement of reservoir oil process after preliminary washing oil, first is that displacement can go out in rock core to the maximum extent
Crude oil makes detergent in device for washing oil second is that being established in rock core for the detergent channel in device for washing oil washing oil
Displacement efficiency at least improve 50%；
2, by by rock core in device for washing oil washing oil, then rock core is placed in centrifuge dripping washing oil liquid in dryer, circulation should
Process not only substantially increases displacement efficiency, and the rock core for washing oil directly heats drying as rock to be measured in device for washing oil
The heart can be taken off directly reducing the process dried using insulating box using without still further heating drying, not only increasing effect
Rate, and staff is avoided to contact with detergent, be conducive to the health of operator；
3, device for washing oil structure of the invention design is simple, and washing oil process is convenient, and detergent used can be recycled.
Detailed description of the invention
Fig. 1 is the flow chart of rapidly and efficiently washing oil method of the invention；
Fig. 2 is the displacement of reservoir oil flowage structure schematic diagram of rapidly and efficiently washing oil method of the invention；
Fig. 3 is the structural schematic diagram of device for washing oil of the present invention；
Fig. 4 is the rock core frame schematic view of the front view of device for washing oil of the present invention；
Fig. 5 is the rock core frame overlooking structure diagram of device for washing oil of the present invention.
Specific embodiment
The present invention is illustrated below according to attached drawing illustrated embodiment.This time disclosed embodiment can consider in all sides
Face is to illustrate, without limitation.The scope of the present invention is not illustrated to be limited by following implementation, only by claims
Shown in range, and including having all deformations in the same meaning and scope of the claims with scope of the claims.
The present invention rapidly and efficiently washing oil method and the structure of device for washing oil are illustrated combined with specific embodiments below.
As shown in connection with fig. 1, rapidly and efficiently washing oil method includes the following steps: the present invention
(1) multiple natural rock samples rock core sample preparation: are processed into the rock core of size needed for testing.Experiment can be cooperated to be pressed from both sides with rock core
The clamping dimension of holder, the rock core of processing include at least one column rock core that diameter is 25mm, 38mm, 100mm, 114mm, this
The rock core of embodiment processing is the column rock core of aforementioned four size, and natural rock sample is hung down along coring rock core using rock core drilling machine
It is straight axially drilled and diameter is made is the cylindric rock sample of 25mm, 38mm, then rock sample both ends are cut flat with neatly along vertical axial；For
Diameter is the natural rock sample of full diameter of 100mm, 114mm, keeps diameter constant, the both ends of natural rock sample are cut flat with along vertical axial
Neatly, length 100-150mm meets the length requirement of core holding unit, and the rock core both ends of each processing is made to be cut into smooth hang down
Directly；
(2) rock core preheats: rock core being put into the heating container for filling detergent, the crude oil in rock core is made to be in flowable shape
State.Specifically: the four size rock cores processed in step (1) are placed in preheating can, detergent is added in preheating can and is added
Temperature makes the heating crude oil in each rock core and is in flowable state, if the rock that can refer to without reservoir temperature to reservoir temperature
The heart, the height and flow regime of visual viscosity of crude, temperature is adjusted to crude oil can be with the temperature of flow regime, i.e., 50~80
DEG C, heating time is 2~4h, and detergent is mixed by methylene chloride and alcohol that mass percent is 7:3；
(3) it establishes the washing oil channel of rock core: rock core being installed to displacement of reservoir oil process, starts displacement of reservoir oil process, passes through detergent displacement rock
Crude oil in the heart establishes the washing oil channel of rock core.Refering to what is shown in Fig. 2, displacement of reservoir oil process includes being set in high temperature constant temperature device
Core holding unit 2 and confining pressure power source 3, the present embodiment high temperature constant temperature device use insulating box 1, and core holding unit 2 is existing production
Product are made of the leather sheath of package rock core, core entry, the plug with valve of outlet and clamp body.In leather sheath and folder
Have a space between holder main body for holding the water from ring press pump, by pressurize make leather sheath tightly wrap rock core, from
The fluid that entrance enters can only be flowed through by the rock core on core holding unit.Confining pressure power source 3 uses ring press pump, starts insulating box
1 constant temperature, while the intermediate receptacle 4 being set in insulating box 1 is filled into detergent, the intermediate receptacle 4 of the present embodiment uses piston
Temperature is set as the reservoir temperature of rock core by intermediate receptacle, not the rock core of reservoir temperature, and temperature is set as 50-80 DEG C simultaneously
Constant temperature 2h makes detergent constant temperature in intermediate receptacle 4 to set temperature.The rock core having had been warmed up is taken out out of preheating can be loaded on
On the suitable core holding unit 2 of the displacement of reservoir oil process, i.e. the core holding unit and full diameter of the core holding unit of 25mm, 38mm
The core holding unit of (100mm, 114mm).Displacement of reservoir oil process is connected, i.e., one end of core holding unit 2 is by high pressure line in
Between container 4 be connected to, intermediate receptacle 4 pumps 6 by high pressure line and displacement and connect, and volume is swept in order to improve drive, in core holding unit 2
Outlet end back-pressure valve 7 is also installed, the outlet end of the core holding unit 2 of 100mm, 114mm passes through high pressure line and metering device 8
Connection, back-pressure valve 7 are installed on the high pressure line, and confining pressure power source 3 exerts a force along the radial direction of rock core, are pacified respectively on each high pressure line
Pressure gauge or pressure sensor are filled, pressure gauge 9 is installed respectively on each high pressure line of the present embodiment, each pressure gauge 9 passes through letter respectively
Number line is connect with computer monitoring device 10.
After rock core is installed, the permeability height depending on rock core sets displacement velocity, and the permeability that back-pressure valve 7 regards rock core is high
The low back pressure for being set as 2-10MPa, starting displacement pump 6, farthest contacted, dissolved with the crude oil in rock core with detergent,
Displacement and wash-off, until the washing oil liquid color displaced is close with the color of detergent before non-displacement, it is believed that displacement is completed, and washing oil is logical
Road, which is established, to be completed.There are two effects for the process: first is that displacement goes out the crude oil in rock core to the maximum extent, second is that establishing in rock core
Washing oil channel when one device for washing oil washing oil, to reduce the thickness that detergent penetrates when washing oil in device for washing oil, in rock
Under the inside and outside pressure effect of the heart, it is formed simultaneously two kind washing oil channel moulds of the surface to outside washing oil inside rock core inside and rock core
Formula, such displacement efficiency at least improve 50%；
(4) device for washing oil washing oil: rock core is placed in device for washing oil through the detergent washing oil of heating, rock core is put into gets rid of later
It is dried in dry machine, recycles the operation, until reaching washing oil criterion of acceptability.With reference to shown in Fig. 3 and Fig. 4, device for washing oil includes washing oil
Agent room 11, detergent room 11 are resistant to 2MPa pressure using the high pressure resistant billy of controllable heating function, and temperature is 80 DEG C ±
, detergent being filled in detergent room, lid is installed thereon, which is a lid for having overpressure alarm pressure release by 5 DEG C.The washing oil
Observation window is offered on agent room 11, to observe washing oil liquid liquid level, by heating the temperature for making detergent be preheating to washing oil rock core.
Detergent room 11 is connected to by pipeline with rock core purge chamber 12, and rock core purge chamber 12 uses the pressure vessel of controllable heating function,
It is resistant to 6MPa pressure, and the rock core purge chamber 12 is suitable with the height of detergent room 11, also offers in the rock core purge chamber 12
Observation window makes detergent be heated to the temperature of washing oil rock core, adds for observing washing oil liquid liquid level and washing oil liquid color by heating
Pressure timing impregnate, make detergent in rock core crude oil and irreducible water come into full contact with, dissolve and replace, cleaning rock core.Rock core is clear
The outlet of chamber wash 12 passes through the connection of pipeline and condenser pipe 13, and condenser pipe 13 is connected to circulating refrigerating device 14, in condenser pipe 13
Water recycled between condenser pipe 13 and circulating refrigerating device 14, the other end of condenser pipe 13 passes through pipeline and condensate liquid storeroom
15 connections, condensate liquid storeroom 15 are connected to by pipeline with rock core purge chamber 12, condensate liquid storeroom 15 pass through siphon pipe 16 and
Valve 17 is connected to detergent room 11, and the import of rock core purge chamber 12 is equipped with safety valve 18, and the bottom of rock core purge chamber 12 is set
There is oil outlet, oil outlet connects high pressure valve, and washing oil or washing oil waste liquid can release from here.The device for washing oil further includes rock
Heart frame 19, the present embodiment use two rock core framves 19.Rock core frame 19 includes placed longitudinally connecting plate 20, which is half
Cylindrical plate body, two rock core framves 19 are combined into cylindrical drum.Connecting plate 20 is equipped at least one rock core being horizontally arranged
Placement plate 21, the present embodiment rock core placement plate 21 are set as multiple, and multiple rock core placement plates 21 are arranged from top to bottom, and each rock core is put
It sets and places multiple rock cores 5 on plate 21 respectively, rock core frame 19 can be removed and placed into rock core purge chamber 12.Multiple rock cores 5 pass through
Rock core protection baffle 22 is spaced from each other, and is provided with multiple through-holes 23 on rock core protection baffle 22, multiple rock cores 5 are placed through more respectively
On a through-hole 23.The connecting plate 20 of rock core frame 19 is connect by removable connector with rock core purge chamber 12, and the present embodiment is removable
Connector is unloaded using the bolt being installed on 12 side wall of rock core purge chamber, jack is set on connecting plate 20, is passed through by bolt
Jack makes rock core purge chamber 12 be detachably connected with connecting plate 20.
Rock core 5 in rock core purge chamber 12 washing oil to a certain extent when, according to petroleum industry standard, using fluorescence levels as
The thorough standard of washing oil is measured, 3 grades of fluorescence is generally scheduled on, rock core frame 19 is taken out together with rock core 5 and is put into industrial dryer
In, the inner wall of industrial dryer is equally equipped with bolt, and rock core frame 19 and industrial dryer, which pass through jack by bolt, makes the two
It is connected and fixed.Consider the distance that washing oil liquid is centrifuged in rock core when centrifugation, rock core 5 is placed along longitudinal direction, makes washing oil liquid
It is flowed out from 5 side of rock core, reduces the distance that washing oil liquid stream goes out rock core 5.The lid of industrial dryer is covered, timing and constant speed,
The washing oil liquid in rock core 5 is centrifuged out rock core by centrifugal force, provides condition into rock core for fresh detergent is secondary, generally
For, with the increase of core permeability, centrifugation time is reduced, and permeability height means that fluid flow resistance is small, in centrifugal force
It makes it easy to be thrown out of when smaller.Rock core 5 that centrifugation is completed is taken out from industrial dryer and to put back to rock core clear with rock core frame 19
In chamber wash 12, it is sealed and is vacuumized rock core purge chamber 12 30-60 minutes by return pump, extract the sky in rock core gap out
Gas avoids the presence due to gas from generating " Jamin effect " and increases the resistance that detergent enters rock core.After evacuation, Xiang Yanxin
It is put into the fresh detergent by heating in purge chamber 12 and pressurizes, promotes detergent to rapidly enter the deep hole of rock core, mentions
High displacement efficiency.
According to the relationship of centrifugal force and core permeability, the centrifugal force for the dryer that different permeability rock cores use is determined,
The following are the relation tables of centrifugal force and core permeability.
| Gas permeability, md | < 0.1 | 0.1-1 | 1-100 | > 100 |
| Centrifugal force, MPa | 2.2 | 1.41 | 1.19 | 0.9 |
| Corresponding revolving speed, rev/min | 9000 | 6700 | 5800 | 4600 |
It is liquefied in rock core purge chamber 12 by the detergent steam of thermal evaporation by condenser pipe 13 as the washing oil of fresh clean
Agent.By the way that circulating refrigerating device 14 is arranged, the temperature of recirculated water can be maintained to lower temperature, the detergent of condensation liquefaction steams
Vapour enters condensate liquid storeroom 15 by condenser pipe 13, and the detergent as fresh clean uses.The detergent can pass through siphon
The siphonage of pipe 16 simultaneously flows back to the continuation of detergent room 11 washing oil by the control of valve 17, by rock core 5 with rock core frame 19 in rock
Cleaning in heart purge chamber 12, the centrifuge dripping in industrial dryer, so circulation above-mentioned steps, until reaching washing oil qualification mark
Standard passes through three-level fluorescence detection；
(5) rock core is dried: rock core 5 is dried in device for washing oil high temperature.The rock core 5 for washing oil is high in rock core purge chamber 12
Temperature drying, drying temperature is 105 ± 2 DEG C, while timing evacuates the evaporation for accelerating detergent, determines that washing oil is imitated by three-level fluorescence
Fruit determines the evaporation situation of detergent in rock core 5 by weighing, and constant weight is qualification less than 5% twice, qualified rock core become to
Rock sample is surveyed, taking-up, which can be used directly, no longer needs to heating drying, and reduce the process dried using insulating box, not only improves efficiency,
And staff is avoided to contact with detergent, be conducive to the health of operator.
The present invention passes through the detergent displacement of displacement of reservoir oil process before being entered device for washing oil by the rock core of washing oil, displaces rock core depth
The crude oil in portion establishes the channel of detergent in rock core, forms inside and outside dual channel mode, and working efficiency improves 50% or more；It
Afterwards, it by taking out the rock core 5 of washing oil to a certain extent from rock core purge chamber 12 together with rock core frame 19, is put into industrial dryer
Centrifugation removes the intrapore washing oil solution of rock core 5 by centrifugal force；Again by taking out and putting back to rock core frame 19 together with rock core 5
Rock core purge chamber 12 vacuumizes after sealing, and removes the gas in 5 hole of rock core, fresh detergent is accelerated to enter the deep of rock core 5,
Thus shorten 30% cleaning time；The rock core 5 for finally washing oil is directly dried in rock core purge chamber 12 on the spot, is reduced
Individually in the process of insulating box drying, rock core can be directly used for measuring, and reduces and is likely to occur rock core damage in rock core transfer process
Bad and operator contacts the injury problem that detergent generates, by adding safety valve 18 in rock core purge chamber 12, it can be ensured that super
Pressure protection.
Embodiment 1
To certain oil field, rock core does oil-water relative permeability test.Rock core needs washing oil.Rock core comes from heavy oil block, viscosity
218mPa.s, initial oil saturation 67%, core diameter 38mm, length 60-80mm, pore volume are about 80ml, permeability
About 120md.Washing oil is carried out according to the above-mentioned washing oil method and apparatus of the present invention.
By alcohol and methylene chloride, 7:3 is configured to mixed liquor detergent is made by mass percentage.Rock core is put into and is filled
It is preheated 3 hours in the container of detergent, preheating temperature is 50~80 DEG C, is then accessed in displacement of reservoir oil process, with detergent displacement rock
Crude oil and water in the heart, detergent displacement amount are 400ml, and washing oil binary channels, which is established, to be completed.Rock core is put into the rock of device for washing oil
In the heart purge chamber washing oil-be put into industrial dryer later dry 15 minutes (6000 revs/min)-place into rock core purge chamber
Middle washing oil-is finally placed into industrial dryer and is dried.After the completion of washing oil, it is 3 grades of fluorescence through Fluorescence Identification, rock core is put into
Rock core cleans after indoor 105 DEG C of high temperature is dried 4 hours and is naturally cooling to room temperature, and rock core is taken out and is put into doing with desiccant
In dry device.Cleaning time is 7 days.Time 22 days or so of more conventional washing oil method washing oil, efficiency improves 64%.
Embodiment 2
Water-sensitive test is done to certain oil field full diameter (114mm) rock core.Rock core needs washing oil.Rock core comes from Ordinary Black Oil block, glues
55mPa.s is spent, initial oil saturation 71%, core diameter 114mm, length 145mm, pore volume is about 300ml, infiltration
Rate is about 70md.Washing oil is carried out according to the above-mentioned washing oil method and apparatus of the present invention.
By alcohol and methylene chloride, 7:3 is configured to mixed liquor detergent is made by mass percentage.Rock core is put into and is filled
It is preheated 6 hours in the container of detergent, preheating temperature is 50~80 DEG C, is then accessed in displacement of reservoir oil process, with detergent displacement rock
Crude oil and water in the heart, detergent displacement amount are 1500ml, and washing oil binary channels, which is established, to be completed.Rock core is put into the rock of device for washing oil
In the heart purge chamber washing oil-be put into industrial dryer later dry 30 minutes (5000 revs/min)-place into rock core purge chamber
Middle washing oil-is finally placed into industrial dryer and is dried.After the completion of washing oil, it is 3 grades of fluorescence through Fluorescence Identification, rock core is put into
Rock core cleans after indoor 105 DEG C of high temperature is dried 8 hours and is naturally cooling to room temperature, and rock core is taken out and is put into doing with desiccant
In dry device.Cleaning time is 15 days.Time 62 days or so of more conventional washing oil method washing oil, efficiency improves 76%.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including undocumented common knowledge in the art or usual
Technological means.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are pointed out by claim.
It should be understood that the invention is not limited to the embodiment method, the structures that are described above, and in the accompanying drawings
The precision architecture shown, and various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is only by appended
Claim limit.
Claims (14)
1. a kind of rapidly and efficiently washing oil method, which comprises the steps of:
(1) multiple natural rock samples rock core sample preparation: are processed into the rock core of size needed for testing；
(2) rock core preheats: the rock core being put into the heating container for filling detergent, the crude oil in rock core is made to be in flowable
State；
(3) it establishes the washing oil channel of rock core: the rock core is installed to displacement of reservoir oil process, pass through the original in detergent displacement rock core
Oil establishes the washing oil channel of rock core；
(4) device for washing oil washing oil: rock core is placed in device for washing oil through the detergent washing oil of heating, rock core is put into gets rid of later
It is dried in dry machine, recycles the operation, until reaching washing oil criterion of acceptability；
(5) rock core is dried: rock core is dried in device for washing oil high temperature.
2. rapidly and efficiently washing oil method according to claim 1, which is characterized in that the rock core in the step (1)
It is at least one column rock core of 25mm, 38mm, 100mm, 114mm including diameter.
3. rapidly and efficiently washing oil method according to claim 1, which is characterized in that the detergent in the step (2) is
It is mixed by methylene chloride and alcohol that mass percent is 7:3.
4. rapidly and efficiently washing oil method according to claim 1, which is characterized in that the container heating in the step (2)
To reservoir temperature or 50~80 DEG C, heating time is 2~4h.
5. rapidly and efficiently washing oil method according to claim 1, which is characterized in that the displacement of reservoir oil process in the step (3)
Including the core holding unit and confining pressure power source being set in high temperature constant temperature device, the rock core is installed on core holding unit,
One end of the core holding unit is connected to by high pressure line with the intermediate receptacle being set in high temperature constant temperature device, the centre
Detergent is filled in container, the intermediate receptacle is connected by high pressure line and displacement pump, the other end of the core holding unit
It is connect by high pressure line with metering device, the confining pressure power source exerts a force along the radial direction of rock core, pacifies on each high pressure line
Equipped with pressure gauge or pressure sensor, each pressure gauge or pressure sensor pass through signal wire and computer monitoring device company respectively
It connects.
6. rapidly and efficiently washing oil method according to claim 5, which is characterized in that the outlet port of rock core holder installation
There is back-pressure valve, the back-pressure valve is installed on the high pressure line of the rock core outlet end connection.
7. rapidly and efficiently washing oil method according to claim 1, which is characterized in that from the drying in the step (4)
After the rock core that machine takes out is put into the rock core purge chamber, first the rock core purge chamber is sealed and vacuumizes 30-60 minutes, later
Fresh detergent is pressurizeed in injection rock core purge chamber again.
8. rapidly and efficiently washing oil method according to claim 1, which is characterized in that the drying temperature of the step (5) is
105±2℃。
9. a kind of device for washing oil, which is characterized in that including detergent room, it is placed with detergent in the detergent room, it is described to wash
Finish room is connected to by pipeline with rock core purge chamber, and the rock core purge chamber outlet is connected to by pipeline with condenser pipe, described cold
Solidifying pipe is connected to circulating refrigerating device, and the water in the condenser pipe recycles between condenser pipe and circulating refrigerating device, described cold
Solidifying pipe is connected to by pipeline with condensate liquid storeroom, and the condensate liquid storeroom is connected by pipeline and rock core purge chamber import
It is logical.
10. device for washing oil according to claim 9, which is characterized in that the detergent room, rock core purge chamber is all made of can
The pressure vessel of heating function is controlled, the detergent room, rock core offer observation window in purge chamber respectively.
11. device for washing oil according to claim 9, which is characterized in that further include rock core frame, the rock core frame includes longitudinal
The connecting plate of placement is provided at least one rock core placement plate being horizontally arranged, multiple rock cores on the connecting plate
Placement plate is arranged from top to bottom, and multiple rock cores are placed in each rock core placement plate, and multiple rock cores are protected by rock core
Baffle is spaced from each other, and the connecting plate of the rock core frame is connect by removable connector with rock core purge chamber.
12. device for washing oil according to claim 11, which is characterized in that the rock core is longitudinally disposed, it is described protection every
Multiple through-holes are provided on shelves, multiple rock cores are placed through multiple through-holes respectively.
13. device for washing oil according to claim 9, which is characterized in that the condensate liquid storeroom passes through siphon pipe and valve
Door is connected to the detergent room.
14. device for washing oil according to claim 9, which is characterized in that the bottom of the rock core purge chamber is equipped with oil outlet,
The oil outlet connects high pressure valve.
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| CN201910160436.XA CN109932233A (en) | 2019-03-04 | 2019-03-04 | Rapidly and efficiently washing oil method and device for washing oil |
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| CN201910160436.XA CN109932233A (en) | 2019-03-04 | 2019-03-04 | Rapidly and efficiently washing oil method and device for washing oil |
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| CN109932233A true CN109932233A (en) | 2019-06-25 |
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| CN201910160436.XA Pending CN109932233A (en) | 2019-03-04 | 2019-03-04 | Rapidly and efficiently washing oil method and device for washing oil |
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