CN108519258A - The apparatus and method tested using matrix-high infiltration strip rock core - Google Patents
The apparatus and method tested using matrix-high infiltration strip rock core Download PDFInfo
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- CN108519258A CN108519258A CN201810197091.0A CN201810197091A CN108519258A CN 108519258 A CN108519258 A CN 108519258A CN 201810197091 A CN201810197091 A CN 201810197091A CN 108519258 A CN108519258 A CN 108519258A
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- 239000011435 rock Substances 0.000 title claims abstract description 154
- 238000001764 infiltration Methods 0.000 title claims abstract description 86
- 230000008595 infiltration Effects 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000011159 matrix material Substances 0.000 claims abstract description 48
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 43
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 33
- 238000006073 displacement reaction Methods 0.000 claims abstract description 31
- 238000011084 recovery Methods 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 16
- 238000002474 experimental method Methods 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 5
- 238000005325 percolation Methods 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 claims description 81
- 230000035699 permeability Effects 0.000 claims description 39
- 239000013043 chemical agent Substances 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 238000013316 zoning Methods 0.000 claims description 3
- 239000011162 core material Substances 0.000 description 167
- 239000000463 material Substances 0.000 description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- 239000006004 Quartz sand Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 239000004576 sand Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 238000004026 adhesive bonding Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000000205 computational method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000009533 lab test Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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Abstract
The apparatus and method tested using matrix high infiltration strip rock core.Main purpose is to provide a kind of indoor experimental apparatus, and the experiment of displacement remaining oil in the case of matrix high infiltration strip is carried out using the device and can obtain accurate experimental data.This method comprises the following steps：Prepare a kind of basement rock high infiltration strip rock core making the fully saturated oil of matrix rock core；Matrix high infiltration strip column rock core is fitted into core holding unit, displacing agent is prepared and is packed into；The various components in described device are connected, displacement test is carried out；Displacement pump is opened, displacement flow rate pump is set, injects displacing agent according to experimental program；According to requirement of experiment time recording injection pressure, Produced Liquid oil pump capacity and water yield, and calculate moisture content and stage recovery percent of reserves；According to acquired experimental result, each stage recovery percent of reserves is depicted as table, each stage injection PV number recovery ratio curves is drawn and is used for determining percolation law and carries out effect assessment or scheme is preferred.
Description
Technical field
The present invention is under the jurisdiction of oil-gas field development field, and matrix-high infiltration strip core experiment is used particularly with regard to a kind of
Apparatus and method.
Background technology
The actual reservoir in China oil field is developed to form the predominant pathways such as macropore and high infiltration strip by long-term injecting, at present
The level of technical monitoring can not be monitored all, also be cannot achieve whole transfer drives and blocked, and no matter lead to high infiltration strip objective reality
On in plane or longitudinal direction, the case where displacement remaining oil, is more universal in the case of matrix-high infiltration strip, can prepare routine at present
The one-dimensional column rock core of column, centre lay high infiltration strip, but indoors test saturated oils when there is saturated oils problem because intermediate
Partial permeability is big, and fat oil is flowed out from middle section when saturated oils, is caused both sides base portion to be unable to fully be saturated, is made
Obtaining subsequent experimental can not carry out, and lead to not carry out matrix-high infiltration strip evaluation study.
Invention content
The technical issues of in order to solve to be previously mentioned in background technology, the present invention is intended to provide a kind of indoor experimental apparatus and
Method can carry out the experiment of displacement remaining oil in the case of matrix-high infiltration strip using the device and method, can avoid matrix
The case where being unable to fully be saturated, to obtain accurate experimental data.
The technical scheme is that：The device that this kind is tested using matrix-high infiltration strip rock core, including displacement
Pump, pipeline, six logical, displacing agent first piston container, displacing agent second piston container, upper valve, lower part valve, pressure gauge,
Arrival end, core holding unit, matrix-high infiltration strip column rock core, graduated cylinder and insulating box, are unique in that：
The matrix-high infiltration strip column rock core is matrix and the high infiltration strip rock core after abundant saturated oils；
Displacement pump is led to by pipeline and six to be connect, described six cross all pipeline respectively with displacing agent first piston container, drive
For the lower part valve connection of agent second piston container, the upper valve of described two piston containers is led to by pipeline and six to be connect,
Described six logical upper connection pressure gauges, described six cross pipeline all connects with the control valve of left part on core holding unit, the rock
Heart clamp holder embeds matrix-high infiltration strip column rock core, and the control valve of the core holding unit right part passes through pipeline and graduated cylinder
It is connected；
The displacement is pumped provides power to entire driving device；Described six lead to and provide multiple accesses for device；The displacing agent
One piston container and displacing agent second piston container are for being packed into different types of chemical agent；The note of the pressure gauge record liquid
Enter pressure；The core holding unit is for fixing the matrix-high infiltration strip column rock core；The graduated cylinder is for accepting Produced Liquid
With metering Produced Liquid volume.
The method tested using matrix-high infiltration strip rock core, this method comprises the following steps：
The first step prepares a kind of basement rock high infiltration strip rock core making the fully saturated oil of matrix rock core, and it is as follows to prepare path：
Layering and zoning compacting matrix and high infiltration strip part in compacting tool set, matrix and high infiltration strip both ends are according to ultra-low penetration
Rate is suppressed, when one-dimensional column rock core coring take among the Oil in Super-low Permeability of both ends be matrix-high infiltration strip long cores, to the base taken
After matter-high infiltration strip rock core judges that matrix rock core saturated oils is complete using Duplicate Samples, using the matrix-high infiltration strip rock core as under
The matrix that one step is tested-high infiltration strip core sample；
Matrix after the abundant saturated oils obtained in the first step-high infiltration strip column rock core is packed into driving device by second step
In core holding unit, prepare displacing agent, and in the correspondence piston container being loaded into described device；
Third walks, and connects the various components in described device, carries out displacement test；
4th step, opens displacement pump, sets displacement flow rate pump, injects displacing agent according to experimental program；
5th step according to requirement of experiment time recording injection pressure, Produced Liquid oil pump capacity and water yield, and calculates moisture content and rank
Section recovery percent of reserves；
Each stage recovery percent of reserves is depicted as table by the 6th step according to the experimental result acquired by the 5th step, draws each stage note
Enter PV numbers-recovery ratio curve, for determining percolation law and carrying out effect assessment or scheme is preferred.
The present invention has the advantages that：For the present invention by design during prepared by rock core, preparing can be with
Verification is matrix-one-dimensional rock core of high infiltration strip column of fully saturated oil, and the rock core is applied in laboratory experiment, passes through
Laboratory experiment evaluates the oil displacement efficiency of the rock core, for the field technology development cleared away obstacle, overcome it is previous because
There is the problem for being unable to fully saturation for high infiltration strip, it is significant.
Description of the drawings：
Fig. 1 prepares the structure that compacting tool set shows used in matrix-high infiltration strip column rock core when being present invention specific implementation and shows
It is intended to.
Fig. 2 prepares rock core used in matrix-high infiltration strip column rock core when being the present invention specific implementation compacting is shown by several times
It is intended to.
Fig. 3 prepares thin plate used in matrix-high infiltration strip column rock core and separates dress material when being present invention specific implementation
Schematic diagram.
Fig. 4 prepares both sides used in matrix-high infiltration strip column rock core when being present invention specific implementation and carries Oil in Super-low Permeability
The column rock core schematic diagram of rock core part.
Fig. 5 is matrix-high infiltration strip column rock core of the fully saturated oil prepared when present invention specific implementation
Column rock core schematic diagram.
Fig. 6 is the composition schematic diagram of experimental provision of the present invention.
Fig. 7 be the present invention a specific embodiment under injection PV numbers-recovery ratio graph of relation for being obtained.
1- die bottom plates, 2- molds coaming plate, 3- molds partition board, 4- top substrates, 5- high infiltration strips, the lower parts 6- base in figure
It is hypertonic after upper matrix, the abundant saturated oils of 10- after matter, 7- right end Oil in Super-low Permeability section, 8- left end Oil in Super-low Permeability section, the abundant saturated oils of 9-
Lower matrix, 12- displacements pump, 13- pipelines, 14- six after the abundant saturated oils of band, 11- is logical, 15- displacing agent first pistons container,
16- displacing agent second pistons container, 17- upper valves, the lower parts 18- valve, 19- pressure gauges, 20- arrival ends, the clamping of 21- rock cores
Device, 22- matrix-high infiltration strip column rock core, 23- graduated cylinders, 24- insulating boxs.
Specific implementation mode：
The invention will be further described below in conjunction with the accompanying drawings：
As shown in fig. 6, the device that this kind is tested using matrix-high infiltration strip rock core, including displacement pump 12, pipeline 13, six
Logical 14, displacing agent first piston container 15, displacing agent second piston container 16, upper valve 17, lower part valve 18, pressure gauge
19, arrival end 20, core holding unit 21, matrix-high infiltration strip column rock core 22, graduated cylinder 23 and insulating box 24, uniqueness
Be in：
The matrix-high infiltration strip column rock core is matrix and the high infiltration strip rock core after abundant saturated oils.
The displacement pump is led to by pipeline and six to be connect, and described six cross pipeline all holds with displacing agent first piston respectively
The lower part valve connection of device, displacing agent second piston container, the upper valve of described two piston containers are logical by pipeline and six
Connection, described six logical upper connection pressure gauges, described six cross pipeline all connects with the control valve of left part on core holding unit, institute
State core holding unit and embed matrix-high infiltration strip column rock core, the control valve of the core holding unit right part by pipeline and
Graduated cylinder is connected.
The displacement is pumped provides power to entire driving device；Described six lead to and provide multiple accesses for device；The displacement
Agent first piston container and displacing agent second piston container are for being packed into different types of chemical agent；The pressure gauge records liquid
Injection pressure；The core holding unit is for fixing the matrix-high infiltration strip column rock core；The graduated cylinder is adopted for accepting
Go out liquid and metering Produced Liquid volume.
The rock core of previously described matrix and high infiltration strip after abundant saturated oils obtains as follows：
Step 1：According to practical reservoir mesostroma permeability to be simulated and high infiltration strip permeability and depth information, use
Rock core compacting tool set and pressure testing machine prepare experiment rock core using quartz sand resin compacting gluing method；
1）When preparation fixation pressure P and hold pressure time T, choose long 200mm, the die assembly of wide 200mm determines Oil in Super-low Permeability rock core
Permeability is 0.1 bold and unconstrained darcy, rock core overall thickness 35mm.By adjusting quartz sand size distribution, epoxy resin adhesive content is divided
Acquisition does not prepare quartz sand size distribution proportion, the gluing of matrix permeability rock core, high infiltration strip rock core and Oil in Super-low Permeability rock core
Agent content parameter.Suppress cementing following 4 blocks whole rock cores respectively later.Fig. 1 is the compacting tool set schematic diagram used.Fig. 2 is rock
The heart suppresses schematic diagram by several times.
2）Matrix rock core A plates drill through core sample, diameter 25mm long 100mm after suppressing cementation solidifying；
3）The rock core B plates of homogeneous high infiltration strip permeability drill through core sample, diameter 25mm long 100mm after suppressing cementation solidifying；
4）Oil in Super-low Permeability rock core C plates drill through core sample, diameter 25mm long 100mm after suppressing cementation solidifying；
5）Heterogeneous matrix-high infiltration strip rock core D plates are prepared, preparation process is as follows：
（1）Because above-mentioned 1）The experimental data of middle acquisition has each material gross mass and suppresses the thickness data of rock core, according to fig. 2
Design thickness combine 1）The experimental data of middle acquisition can calculate matrix rock core, high infiltration strip rock core and Oil in Super-low Permeability rock core
Required material total volume calculates quartz sand size distribution proportion needed for Fig. 2 and total using the computational methods of volume ratio
Sand amount, adhesive total amount, curing agent content.After being mixed with adhesive to 3 parts of rock core materials, stranding sand is carried out respectively, sieving prepares.
Then matrix material is divided into 2 parts, Oil in Super-low Permeability rock core material is divided into 3 parts according to correspondence after calculating volume in Fig. 2.
（2）Bottom plate, mold are installed, suppresses three layers of rock core respectively, Fig. 3 is that thin plate separates dress material schematic diagram.Specific step
It is rapid as follows：
1. suppressing first layer：The use of length is 2 thin thin planks of 200mm（Thick 1mm）Unitary mould is divided into 3 parts, two
Side width 50mm, intermediate width 100mm, as shown in figure 3, the 1st part of point good uniformly mixed matrix material is uniform to be packed into mould
Having middle section, Oil in Super-low Permeability rock core material is put into two side portions, and after pumping veneer matter baffle, pressing plate is put above whole material,
Stop pressurization after being slowly forced into pressure P using pressure testing machine；
2. suppressing the second layer：Reuse 2 thin baffles（Thick 1mm）It is separated into 3 parts, both sides width 50mm, intermediate width
100mm, is packed into the material of high infiltration strip among thin plate, both sides according to high infiltration strip THICKNESS CALCULATION excess of export low permeability cores material matter
Amount, careful uniform loading Oil in Super-low Permeability rock core material, removes 2 veneer baffles, and pressure is put in the whole top of second layer material
Plate stops pressurization after being slowly forced into pressure P using pressure testing machine；
3. suppressing third layer：2 veneers are put among rock core mold again（Thick 1mm）Separate, position is constant, successively in
Between the 2nd part of matrix material is partly added, by remaining Oil in Super-low Permeability surplus material it is average be even added to veneer both sides, again
It extracts veneer out, pressing plate will be added above overall third part material, be slowly forced into using pressure testing machine after pressure P and persistently added
Press T time section.After, top board is taken out in pressure release, and it is small that the rock core pressed is put into 90 degrees Celsius of solidifications 24 of constant temperature in insulating box
When.
（3）The rock core coring that the core bit for being 210mm with a diameter of 25mm length will be cured, it is hypertonic after selection coring
Pillar location 4 pieces of rock core placed in the middle is spare, and it is 200mm that the core diameter of taking-up, which is 25mm length, number D1, D2, D3,
D4, for use, monolithic rock core such as Fig. 4.
Step 2：Gained rock core in step 1 is subjected to saturated oils, and preferably goes out to meet the rock core that fully saturated oil requires.
1）By in step 12）、3）、4）The cylindrical sample of acquirement is individually placed to evacuation in core holding unit, saturated water, satisfies
And oil, calculate the porosity of 3 kinds of rock coresMatrix、ØBand、ØIt is ultralowAnd initial oil saturation SOi matrix、SOi bands、SOi is ultralow.According to 3 kinds
The initial oil saturation of rock core calculates the theoretical porosity of D1-D4 rock cores in inventive step oneIt is theoreticalWith initial oil saturation
SOi is theoretical；
2）D1-D4 blocks rock core in selecting step one is sequentially placed into the core holding unit that length is 200mm, evacuates, calculates actual measurement hole
Porosity, choose its in inventive step twoIt is theoreticalImmediate rock core carries out follow-up saturated oils experiment；
3）200mm column rock cores in step 3 preferably out are put into the core holding unit of appropriate length, 10MPa rings are set
Back pressure 6MPa is arranged in pressure, clamper outlet end, and inlet pressure carries out the saturated oils mistake of oily expelling water using constant pressure pump since 7MPa
After Cheng Zhizhi exit velocities are stablized, injection end pressure is gradually increased successively to 8MPa, 9MPa, is discharged according to clamper outlet end
Total amount calculates rock core actual measurement oil saturation SOi is surveyedIf SOi is surveyedWith S in inventive step threeOi is theoreticalError is within ± 1%, it is believed that
Saturated oils saturation is complete, otherwise repeats to make and tests rock core D in inventive step one, and it is that 200mm rock cores repeat to drill through length
Evacuation, saturated water, saturated oils operation, until meeting error requirements.Finally select the rock core D for meeting fully saturated requirement.
Step 3：Abundant saturated oils rock core in step 2 preferably out is carried out both ends under anhydrous condition to cut, section
Grinding, end face cleaning treatment obtain the matrix-high infiltration strip rock core for the abundant saturated oils that a diameter of 25mm length is 100mm, such as
Shown in Fig. 5.
The method tested using matrix-high infiltration strip rock core is given below, this method comprises the following steps：
The first step prepares a kind of basement rock high infiltration strip rock core making the fully saturated oil of matrix rock core, and it is as follows to prepare path：
Layering and zoning compacting matrix and high infiltration strip part in compacting tool set, matrix and high infiltration strip both ends are according to ultra-low penetration
Rate is suppressed, when one-dimensional column rock core coring take among the Oil in Super-low Permeability of both ends be matrix-high infiltration strip long cores, to the base taken
After matter-high infiltration strip rock core judges that matrix rock core saturated oils is complete using Duplicate Samples, using the matrix-high infiltration strip rock core as under
The matrix that one step is tested-high infiltration strip core sample.Specific preparation process matrix with reference to the foregoing and hypertonic item
The band rock core preparation process after abundant saturated oils.
Matrix after the abundant saturated oils obtained in the first step-high infiltration strip column rock core is packed into experiment dress by second step
In the core holding unit set, prepare displacing agent, and in the correspondence piston container being loaded into described device；
Third walks, and connects the various components in described device, carries out displacement test；
4th step, opens displacement pump, sets displacement flow rate pump, injects displacing agent according to experimental program；
5th step according to requirement of experiment time recording injection pressure, Produced Liquid oil pump capacity and water yield, and calculates moisture content and rank
Section recovery percent of reserves；
Each stage recovery percent of reserves is depicted as table by the 6th step according to the experimental result acquired by the 5th step, draws each stage note
Enter PV numbers-recovery ratio curve to be used for determining percolation law and carry out effect assessment or scheme is preferred.
In the following, providing the specific embodiment of an implementation this method：
Using the permeability of Daqing oilfield reservoir and core intersection data as foundation, the present embodiment will carry out aforementioned each inventive step
It is expanded on further.
Step 1：According to the actual block condition of Daqing oil field, matrix permeability to be simulated is 500 × 10-3μm2, high
Infiltration strip permeability 2200 × 10-3μm2, the high infiltration strip thickness in the one-dimensional cylinder rock core being calculated according to similarity criterion is
3mm prepares rock core using rock core compacting tool set and pressure testing machine using quartz sand resin compacting gluing method.
1）Fixation pressure 10MPa and pressure time 5min is held when preparation, chooses long 200mm, the die assembly of wide 200mm, really
It is 0.1 × 10 to determine Oil in Super-low Permeability core permeability-3μm2, rock core overall thickness 35mm.By adjusting quartz sand size distribution, asphalt mixtures modified by epoxy resin
Fat gluing agent content, respectively acquisition prepare the quartzy sand grains of matrix permeability rock core, high infiltration strip rock core and Oil in Super-low Permeability rock core
It is as follows to spend distribution proportion, adhesive content parameter：
1 material proportion table of table
2）Matrix rock core A plates are prepared according to table 1, core sample, diameter 25mm long 100mm are drilled through after suppressing cementation solidifying；
3）The rock core B plates of homogeneous high infiltration strip permeability are prepared according to table 1, and core sample, diameter are drilled through after suppressing cementation solidifying
25mm long 100mm；
4）Oil in Super-low Permeability rock core C plates are prepared according to table 1, core sample, diameter 25mm long 100mm are drilled through after suppressing cementation solidifying；
5）Heterogeneous matrix-high infiltration strip rock core D plates are prepared, preparation process is as follows：
（1）Because above-mentioned 1）The experimental data of middle acquisition has each material gross mass and suppresses the thickness data of rock core, according to fig. 2
Design thickness combine 1）The experimental data of middle acquisition can calculate matrix rock core, high infiltration strip rock core and Oil in Super-low Permeability rock core
Required material total volume calculates quartz sand size distribution proportion needed for Fig. 2 and total using the computational methods of volume ratio
Sand amount, adhesive total amount, curing agent content.After being mixed with adhesive to 3 parts of rock core materials, stranding sand is carried out respectively, sieving prepares.
Then matrix material is divided into 2 parts, Oil in Super-low Permeability rock core material is divided into 3 parts according to correspondence after calculating volume in Fig. 2.It is as follows
Table：
2 heterogeneous core material proportion table of table
| Coarse sand mesh number（40-70）Quality（Gram） | Fine sand mesh number（300）Quality（Gram） | Resin quality（Gram） | Curing agent quality（Gram） | Corresponding permeability（×10-3μm2） | Remarks | Material gross mass（Gram） |
| 815 | 1285 | 247 | 16 | 500 | Matrix | 2363 |
| 113 | 52 | 25 | 2 | 2200 | High infiltration strip | 192 |
| 46 | 2203 | 474 | 30 | 0.1 | Oil in Super-low Permeability | 2753 |
3 heterogeneous core each section material allocation table of table
（2）Bottom plate, mold are installed, three layers of rock core is suppressed respectively, is as follows：
1. suppressing first layer：The use of length is 2 thin thin planks of 200mm（Thick 1mm）Unitary mould is divided into 3 parts, two
Side width 50mm, intermediate width 100mm, as shown in figure 3, point the 1st part 1181.5 grams of good uniformly mixed matrix material is uniformly
Loading mold middle section, Oil in Super-low Permeability rock core material is put into two side portions, whole after pumping veneer matter baffle per 654 grams of part
Pressing plate is put above body material, stops pressurization after pressure 10MPa is slowly forced into using pressure testing machine；
2. suppressing the second layer：Reuse 2 thin baffles（Thick 1mm）It is separated into 3 parts, both sides width 50mm, intermediate width
100mm, thin plate centre are packed into 192 grams of the material of high infiltration strip, and both sides are according to high infiltration strip THICKNESS CALCULATION excess of export low permeability cores
Each 69 grams of quality of material, careful uniform loading Oil in Super-low Permeability rock core material, removes 2 veneer baffles, and second layer material is whole
Pressing plate is put above body, stops pressurization after pressure 10MPa is slowly forced into using pressure testing machine；
3. suppressing third layer：2 veneers are put among rock core mold again（Thick 1mm）Separate, position is constant, successively in
Between the 2nd part 1181.5 grams of matrix material is partly added, remaining Oil in Super-low Permeability surplus material is respectively added to veneer both sides 654
Gram, it extracts 2 veneers out again, pressing plate will be added above overall third part material, pressure is slowly forced into using pressure testing machine
Persistent pressure 5min after power 10MPa.After, pressure release takes out top board, the rock core pressed is put into constant temperature 90 in insulating box and is taken the photograph
Family name's degree cures 24 hours.
（3）The rock core coring that the core bit for being 210mm with a diameter of 25mm length will be cured, it is hypertonic after selection coring
Pillar location 4 pieces of rock core placed in the middle is spare, and it is 200mm that the core diameter of taking-up, which is 25mm length, number D1, D2, D3,
D4, for use, monolithic rock core such as Fig. 4.
Step 2：Gained rock core in step 1 is subjected to saturated oils, and preferably goes out to meet the rock core of fully saturated requirement.
1）By in step 12）、3）、4）The cylindrical sample of acquirement is individually placed to evacuation in core holding unit, saturated water, satisfies
And oil, calculate the porosity of 3 kinds of rock coresMatrix,ØBand,ØIt is ultralowAnd initial oil saturation SOi matrix,SOi bands,SOi is ultralow.According to 3 kinds of rocks
The initial oil saturation of the heart calculates the theoretical porosity of D1-D4 rock cores in inventive step oneIt is theoreticalWith initial oil saturation
SOi is theoretical。
Table 4 is tested and result of calculation table
2）D1-D4 blocks rock core in selecting step one is put into the true core holding unit for being sequentially placed into length as 200mm, evacuates, calculates
Survey porosity, choose its in inventive step twoIt is theoreticalImmediate rock core carries out follow-up saturated oils experiment.
Table 5 is tested and result of calculation table
| Classification | Rock core of the both ends with Oil in Super-low Permeability（It is theoretical） | D1 is surveyed | D2 is surveyed | D3 is surveyed | D4 is surveyed |
| Porosity | ØIt is theoretical=17.8% | 17.1% | 17.7% | 16.8% | 17.0% |
According to correction data, preferably D2 blocks rock core carries out subsequent experimental.
3）Will in D2 core holding units, be arranged 10MPa ring pressures, clamper outlet end be arranged back pressure 6MPa, inlet pressure from
7MPa starts, and the saturated oils process for carrying out oily expelling water using constant pressure pump gradually increases injection successively until after exit velocity stabilization
End pressure goes out water inventory to 8MPa, 9MPa, according to clamper outlet end and calculates rock core actual measurement oil saturation SOi is surveyed。
Table 6 is tested and result of calculation table
| Classification | Rock core of the both ends with Oil in Super-low Permeability（It is theoretical） | D2 is surveyed | Remarks |
| Initial oil saturation | SOi is theoretical=68.9% | 68.2% | Meet requirement of experiment |
Step 3：D2 rock cores are carried out both ends under anhydrous condition to cut, section grinding, end face cleaning treatment obtains a diameter of
25mm length is matrix-crack rock core of the abundant saturated oils of 100mm.As shown in Figure 5；
Step 4:Matrix-high infiltration strip column rock core after the abundant saturated oils of three gained of inventive step is packed into rock core clamping
Device connects each experiment device, carries out displacement test；
Experimental program is as follows：
7 experimental program of table
| Scheme one | Water drive is to recovery ratio 38%+ polymer floodings 0.6PV（Concentration 1000mg/L） |
1）Prepare simulated formation water and it is common in divide polymer, and be respectively charged into piston container.Experiment is packed into rock core
Core holding unit；
2）Connect displacement test device；
3）Displacement pump is opened, displacement flow rate pump is set as 0.3mL/min, injects water and polymer according to experimental program；
4）Injection pressure, Produced Liquid oil pump capacity and water yield are recorded every 10min, and calculates moisture content and stage recovery percent of reserves；
Step 5：According to experimental result, summarizes percolation law and carry out effect assessment or scheme is preferred.By each stage recovery percent of reserves
It is as shown in table 8 to be depicted as table, draws each stage injection PV numbers-recovery ratio curve, as shown in Figure 7.
8 polymer flooding experimental result of table
| Protocol Numbers | Core numbers | Water drive recovery percent of reserves（%） | Polymer flooding recovery percent of reserves（%） | Overall recovery efficiency（%） |
| Scheme one | D2 | 38 | 17.35 | 55.35 |
Claims (2)
1. a kind of device tested using matrix-high infiltration strip rock core, including displacement pump（12）, pipeline（13）, it is six logical
（14）, displacing agent first piston container（15）, displacing agent second piston container（16）, upper valve（17）, lower part valve（18）、
Pressure gauge（19）, arrival end（20）, core holding unit（21）, matrix-high infiltration strip column rock core（22）, graduated cylinder（23）And it is permanent
Incubator（24）, it is characterised in that：
The matrix-high infiltration strip column rock core is matrix and the high infiltration strip rock core after abundant saturated oils；
Displacement pump is led to by pipeline and six to be connect, described six cross all pipeline respectively with displacing agent first piston container, drive
For the lower part valve connection of agent second piston container, the upper valve of described two piston containers is led to by pipeline and six to be connect,
Described six logical upper connection pressure gauges, described six cross pipeline all connects with the control valve of left part on core holding unit, the rock
Heart clamp holder embeds matrix-high infiltration strip column rock core, and the control valve of the core holding unit right part passes through pipeline and graduated cylinder
It is connected；
The displacement is pumped provides power to entire driving device；Described six lead to and provide multiple accesses for device；The displacing agent
One piston container and displacing agent second piston container are for being packed into different types of chemical agent；The note of the pressure gauge record liquid
Enter pressure；The core holding unit is for fixing the matrix-high infiltration strip column rock core；The graduated cylinder is for accepting Produced Liquid
With metering Produced Liquid volume.
2. a kind of method tested using matrix-high infiltration strip rock core, this method comprises the following steps：
The first step prepares a kind of basement rock high infiltration strip rock core making the fully saturated oil of matrix rock core, and it is as follows to prepare path：
Layering and zoning compacting matrix and high infiltration strip part in compacting tool set, matrix and high infiltration strip both ends are according to ultra-low penetration
Rate is suppressed, when one-dimensional column rock core coring take among the Oil in Super-low Permeability of both ends be matrix-high infiltration strip long cores, to the base taken
After matter-high infiltration strip rock core judges that matrix rock core saturated oils is complete using Duplicate Samples, using the matrix-high infiltration strip rock core as under
The matrix that one step is tested-high infiltration strip core sample；
Matrix after the abundant saturated oils obtained in the first step-high infiltration strip column rock core is packed into claim 1 institute by second step
In the core holding unit for stating device, prepare displacing agent, and in the correspondence piston container being loaded into described device；
Third walks, and connects the various components in described device, carries out displacement test；
4th step, opens displacement pump, sets displacement flow rate pump, injects displacing agent according to experimental program；
5th step according to requirement of experiment time recording injection pressure, Produced Liquid oil pump capacity and water yield, and calculates moisture content and rank
Section recovery percent of reserves；
Each stage recovery percent of reserves is depicted as table by the 6th step according to the experimental result acquired by the 5th step, draws each stage note
Enter PV numbers-recovery ratio curve, for determining percolation law and carrying out effect assessment or scheme is preferred.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114062A (en) * | 2015-09-21 | 2015-12-02 | 山东科技大学 | Testing device for simulating permeability rule of low-permeability horizontal well and testing method |
| CN205154119U (en) * | 2015-12-02 | 2016-04-13 | 陕西靖瑞石油工程有限公司 | Glass test piece used for simulating foam flooding |
| CN106285590A (en) * | 2016-09-30 | 2017-01-04 | 东北石油大学 | A kind of judge the apparatus and method whether chemical agent lost efficacy for high infiltration strip parameter |
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2018
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114062A (en) * | 2015-09-21 | 2015-12-02 | 山东科技大学 | Testing device for simulating permeability rule of low-permeability horizontal well and testing method |
| CN205154119U (en) * | 2015-12-02 | 2016-04-13 | 陕西靖瑞石油工程有限公司 | Glass test piece used for simulating foam flooding |
| CN106285590A (en) * | 2016-09-30 | 2017-01-04 | 东北石油大学 | A kind of judge the apparatus and method whether chemical agent lost efficacy for high infiltration strip parameter |
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