CN109239311A - Blocking agent degree of filling test method - Google Patents
Blocking agent degree of filling test method Download PDFInfo
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- CN109239311A CN109239311A CN201811237643.2A CN201811237643A CN109239311A CN 109239311 A CN109239311 A CN 109239311A CN 201811237643 A CN201811237643 A CN 201811237643A CN 109239311 A CN109239311 A CN 109239311A
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- 239000002981 blocking agent Substances 0.000 title claims abstract description 76
- 238000010998 test method Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000012530 fluid Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000012360 testing method Methods 0.000 claims abstract description 27
- 239000011435 rock Substances 0.000 claims abstract description 17
- 238000010146 3D printing Methods 0.000 claims abstract description 13
- 238000002474 experimental method Methods 0.000 claims abstract description 10
- 238000004458 analytical method Methods 0.000 claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims description 22
- 239000007924 injection Substances 0.000 claims description 22
- 239000011148 porous material Substances 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 13
- 238000009826 distribution Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 6
- 238000003384 imaging method Methods 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 230000005012 migration Effects 0.000 claims description 3
- 238000013508 migration Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 238000003860 storage Methods 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 abstract description 3
- 238000012546 transfer Methods 0.000 abstract description 3
- 238000013178 mathematical model Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000284 extract Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000009671 shengli Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 239000011800 void material Substances 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
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Abstract
The present invention relates to a kind of blocking agent degree of filling test methods, and it includes following steps: (1) obtaining stratum true core；(2) according to result of core analysis, low temperature drills through the rock core section for reflecting different level water drive bands；(3) rock core section is scanned using high-precision Microfocus X-ray X-ray CT, to obtain internal structure, constructs the digital core model of reservoir porous；(4) physical model is made using 3D printing technique；(5) test data that the test of blocking agent degree of filling (6) are obtained based on above-mentioned steps is carried out using " Gas-water phases seepage flow is fine to see visualized experiment platform ", two-phase interface flow velocity, fluid distrbution and saturation degree is calculated and analyzed；(7) according to experimental result, the applicable blocking agent system of level water drive band is determined.The method of the present invention is conducive to understand that the tune of macropore blocks up mechanism, the transfer drive technology that development adjusts the stifled and displacement of reservoir oil to combine.
Description
Technical field
The present invention relates to a kind of blocking agent degree of filling test methods.
Background technique
Middle and high infiltration oil reservoir ultra-high water-containing development late stage, it is heterogeneous to be further exacerbated by.Water plugging and profiling technology has become improvement note
Water development effectiveness, the effective means for realizing oilfield stable production.But with the continuous progress of waterflooding extraction, near wellbore zone remaining oil subtracts
Few, waterflood efficiency is lower and lower, and is influenced that near wellbore zone profile control effect is made to be deteriorated by detour flow, and deep remaining oil obtains not
To effective driving, the requirement to the water-control oil-increasings technology such as water plugging and profile controlling is higher and higher, and difficulty is also increasing.It generallys use at present
The blocking agents such as frozen glue, the particle that can be flowed in stratum macrovoid or crack are injected into water injection well, realize that injection fluid exists
The steering of oil deposit deep part.However, blocking agent plugging effect is limited since the matching of blocking agent intensity and macropore is not good enough, not only make
It is wasted at blocking agent and is difficult to form the blocking agent slug of high quality, cause the producing well of surrounding ineffective or the difference that takes effect；It is tight as a result,
The effect of water plugging and profile controlling is affected again, this will cause to seriously affect to oilfield stable production and ultimate recovery.
Water drive band can be obviously divided into extreme water by oil displacement efficiency or remaining oil saturation by ultra-high water-containing development late stage
Three band, strong watered-out zone, weak aquifer drive band levels are washed, different level water drive band planes disperse, are longitudinally staggered, interfere each other,
It influences each other.It is existing that stifled system is adjusted to be unable to satisfy different level water drive band differentiation regulation demands.First is that different level water drive bands
Water-flooding characteristics and regulation demand difference are big, and existing blocking agent type can not meet the stifled demand of tune comprehensively；Second is that the nearly well of well is washed by force,
Perforation needs indepth plugging to regulate and control between water drive band oil-water well, blocks controllability to system deep migration and proposes requirements at the higher level.
Therefore, degree of filling and distribution characteristics of every class blocking agent in the heterogeneous duct of different levels are effectively verified, to understanding
The tune of macropore blocks up mechanism, and the transfer drive technology that development adjusts the stifled and displacement of reservoir oil to combine prevents blocking agent solution channelling, controls subsequent waterflooding
Stage injects fingering, the channelling of water, improves the effect of waterflooding extraction, improves oil recovery and is of great significance.
Summary of the invention
The present invention provides a kind of blocking agent degree of filling test method, and it includes following steps:
(1) stratum true core is obtained, Ultra-cryofreezing preservation is so that the irreducible water in rock core volatilizees；
(2) according to result of core analysis, low temperature drills through the rock core section for reflecting different level water drive bands, freezen protective；
(3) rock core section is scanned using high-precision Microfocus X-ray X-ray CT, to obtain internal structure, such as hole and
Distribution of particles；And using matched image reconstruction software obtain rock core internal structure slice map, herein on the basis of figure extract and structure
Build the digital core model of reservoir porous；
(4) there is the pore structure physical model of identical pore structure and required wetability using 3D printing technique production；
(5) carry out the test of blocking agent degree of filling using " the fine sight visualized experiment platform of Gas-water phases seepage flow ": the platform will
Fluid displacement is combined with imaging system, with carry out during two phase fluid flow it is real-time, in line imaging,
The image taking of two-phase interface, distribution is wherein carried out using high speed camera；
Wherein test specimen (that is, physical model of step (4)) is saturated according to oil, the water bar part in Practical Project；
(6) test data (including the above-mentioned information measured such as video, image and data) obtained based on above-mentioned steps, it is right
Two-phase interface flow velocity, fluid distrbution and saturation degree are calculated and are analyzed；
(7) according to experimental result, the applicable blocking agent system of level water drive band is determined.
The present invention realizes survey of the porous media heterogeneity to blocking agent filling pore structure feature on micro- meso-scale
Examination；Using image processing method and self-compiling program, the automatic calculating of batch is carried out to two-phase interface flow velocity, fluid distrbution and saturation degree
And analysis, disclose the features such as distribution, saturation degree of the blocking agent during oil-water two-phase fluid blocks；The method of the present invention is conducive to reason
The tune for solving macropore blocks up mechanism, and the transfer drive technology that development adjusts the stifled and displacement of reservoir oil to combine prevents blocking agent solution channelling, controls subsequent water
The drive stage injects fingering, the channelling of water, improves the effect of waterflooding extraction, improves oil recovery.
Detailed description of the invention
The true core of Fig. 1 embodiment of the present invention 1 fetched using high-precision Microfocus X-ray X-ray CT to scene is swept
It retouches, the image of the representative layer along seepage direction is extracted from three-dimensional data
Fig. 2 embodiment of the present invention 1 constructs mathematical model to scan image binary conversion treatment, and according to bianry image, adopts
The image of corresponding physical model is constructed with 3D printing technique
When the carry out blocking agent of Fig. 3 embodiment of the present invention 1 is full of test, image when blocking agent is injected
When the carry out blocking agent of Fig. 4 embodiment of the present invention 1 is full of test, constant speed injects the image of blocking agent
When the carry out blocking agent of Fig. 5 embodiment of the present invention 1 is full of test, continue the image of constant speed injection blocking agent
When the carry out blocking agent of Fig. 6 embodiment of the present invention 1 is full of test, image that blocking agent is full of
The true core of Fig. 7 embodiment of the present invention 2 fetched using high-precision Microfocus X-ray X-ray CT to scene is swept
It retouches, the image of the representative layer along seepage direction is extracted from three-dimensional data
Fig. 8 embodiment of the present invention 2 constructs mathematical model to scan image binary conversion treatment, and according to bianry image, adopts
The image of corresponding physical model is constructed with 3D printing technique
When the carry out blocking agent of Fig. 9 embodiment of the present invention 2 is full of test, image when blocking agent is injected
When the carry out blocking agent of Figure 10 embodiment of the present invention 2 is full of test, constant speed injects the image of blocking agent
When the carry out blocking agent of Figure 11 embodiment of the present invention 2 is full of test, continue the image of constant speed injection blocking agent
When the carry out blocking agent of Figure 12 embodiment of the present invention 2 is full of test, image that blocking agent is full of
Specific embodiment
The present invention provides a kind of blocking agent degree of filling test method, and it includes following steps:
(1) stratum true core is obtained, Ultra-cryofreezing preservation is so that the irreducible water in rock core volatilizees；
(2) according to result of core analysis, low temperature drills through the rock core section for reflecting different level water drive bands, freezen protective；
(3) rock core section is scanned using high-precision Microfocus X-ray X-ray CT, to obtain internal structure, such as hole and
Distribution of particles；And using matched image reconstruction software obtain rock core internal structure slice map, also optionally first to this figure into
Row binary conversion treatment (passes through binary conversion treatment, is converted into black and white binary map, wherein black represents hole, and white represents rock base
Matter), the digital core model of reservoir porous is then extracted and constructed herein on the basis of figure；
(4) there is the pore structure physical model of identical pore structure and required wetability using 3D printing technique production；
(5) carry out the test of blocking agent degree of filling using " the fine sight visualized experiment platform of Gas-water phases seepage flow ": the platform will
Fluid displacement is combined with imaging system, with carry out during two phase fluid flow it is real-time, in line imaging,
The image taking of two-phase interface, distribution is wherein carried out using high speed camera；
Wherein test specimen (physical model of step (4)) is saturated according to oil, the water bar part in Practical Project；
(6) test data obtained based on above-mentioned steps, calculates two-phase interface flow velocity, fluid distrbution and saturation degree
And analysis；
(7) according to experimental result, the applicable blocking agent system of level water drive band is determined.
It is scanned in the present invention using the true core that high-precision Microfocus X-ray X-ray CT fetches scene；The scanning system
Under unified central planning to have high voltage x-ray system, the spatial resolution of industry CT is up to 5 μm.The high-precision of the equipment identifies and 3-D image
Analysis ability meets the high-precision scanning demand of observation true core internal void and distribution of particles.It is set for example, by using commercially available
It is standby: Shimadzu Microfocus X-ray X-ray CT system inspeXio SMX-100CT.
In the present invention, being not required to mold using 3D printing technique can quick Fabrication complexity solid three-dimensional model, formed precision
The advantages that higher, high degree of automation.
The fine specifying information for seeing visualized experiment platform of the Gas-water phases seepage flow of step (5), for example, see document
Chang C,Ju Y,Xie H,Zhou Q,Gao F.Non-Darcy interfacial dynamics of air-water
two-phase flow in rough fractures under drainage conditions.Scientific
Reports.2017；7(1):4570.
Step (5) can also be carried out by following manner: being injected using laboratory syringe pump constant flow and carried out the survey of blocking agent degree of filling
Examination experiment, and pass through the real-time flow process during high speed camera record two phase fluid flow.
In a preferred embodiment, it wherein in step (3), extracts from the three-dimensional data that scanning obtains along seepage flow
The representative layer in direction, establishes model accordingly, and according to the variation of scanning core image parameter, carries out such as model hole and shouts ratio, several
The extraction and analysis of what topological parameter etc., to construct the mathematical model of different permeabilities and different permeability combinations.
In a preferred embodiment, wherein in step (5), fluid injection is controlled by essence control syringe pump, is adopted
With constant current fast (such as 1-5ml/min) injection control；Wherein in test process, environment temperature and outlet border pressure field are controlled
It is constant.The essence control syringe pump minimum injection flow meets the needs to different injection flow velocitys up to 0.1 μ L/min.
The flow velocity that fluid injection is determined according to reservoir property is needed in actual production；It is tested since reservoir scale is significantly larger than
Model dimension used in room, thus flow can be much larger.
In a preferred embodiment, wherein in step (5), according to Practical Project condition with different injection pressures
Power injects blocking agent into the pore structure of test specimen；It when blocking agent system is injected, records when clapping, is full of until being injected into system, wherein
High-speed camera captures, identifies the migration process of unstable interface under different condition.
In the present invention, the image taking of two-phase interface, distribution is carried out using high speed camera, shooting process can be automated
Control.In shooting process guarantee environmental light intensity it is constant, advantageously ensure that the acquisition of local high-definition image.
In a preferred embodiment, wherein change blocking agent type and two phase fluid flow condition (for example, injection rate,
Pressure), it carries out repeating test.
In a preferred embodiment, wherein in step (6), the peak face of fluid flow and boundary are known automatically
Not, it extracts, and the automatic calculating of batch and analysis is carried out to two-phase interface flow velocity, fluid distrbution and saturation degree；Based on digital picture
The compactedness and saturation degree of blocking agent are calculated, distribution of blocking agent during oil-water two-phase fluid blocks, saturation degree, opposite is obtained
Permeability.
In a preferred embodiment, wherein rock core section for different level water drive bands, carries out for not at the same level
The degree of filling of the blocking agent system of secondary water drive band is tested, and the applicable blocking agent system of different level water drive bands is analyzed；Carry out different levels
The combine analog of water drive band obtains applicable blocking agent system combinations.
1 Shengli Oil Field orphan East block models of example
By taking the 8-3 sample of lonely east as an example, locating depth of stratum is 1338.5m, is in strong flooded strata.It is micro- using high-precision
The true core that focus X-ray-ray CT fetches scene is scanned, to obtain digital cores model.It is extracted from three-dimensional data
Along the representative layer of seepage direction, as shown in Figure 1, simultaneously modeling accordingly.By carrying out binary conversion treatment to scan image, gained is represented
Layer porosity is 48.28%, and volume shared by hole of the effective aperture greater than 20um is 35.61%.
Corresponding pore structure physical model is made using 3D printing technique: constructing mathematical model according to binary image,
Corresponding physical model is constructed using 3D printing technique, it is ensured that physical model and mathematical model have completely the same hole
Shape characteristic, as shown in Figure 2.
The test of blocking agent degree of filling is carried out using " the fine sight visualized experiment platform of Gas-water phases seepage flow ".According to practical work
Journey condition injects blocking agent into pore structure with different charge velocities, when blocking agent system is injected, records when clapping.To two phase boundaries
Surface current speed, fluid distrbution and saturation degree are calculated and are analyzed.
3D printing model is placed on experiment porch, to inject SP8 blocking agent, charge velocity 2ml/min, use is constant
Rate injection.It is extracted stifled using high speed camera real-time recording injection process with by being analyzed injection process pictorial information
Degree of filling in agent injection process.If Fig. 3-6 shows, using the charge velocity of 2ml/min, blocking agent SP8 can realize that model injection is filled
Full scale 88.78%.
It needs to determine flow according to reservoir property in actual production；Since reservoir scale is significantly larger than used in laboratory
Model dimension, thus flow can be much larger.
2 Gudao area of Shengli Oilfield block models of example
By taking isolated island Dao-2 sample as an example, locating depth of stratum is 1260.8m, is in strong flooded strata.Using high-precision
The true core that Microfocus X-ray X-ray CT fetches scene is scanned.Obtain digital cores model.It is extracted from three-dimensional data
Along the representative layer of seepage direction, as shown in fig. 7, simultaneously modeling accordingly.By carrying out binary conversion treatment to scan image, gained is represented
Layer porosity is 50.57%, and volume shared by hole of the effective aperture greater than 20um is 34.37%.
Corresponding pore structure physical model is made using 3D printing technique: constructing mathematical model according to binary image,
Corresponding physical model is constructed using 3D printing technique, it is ensured that physical model and mathematical model have completely the same hole
Shape characteristic, as shown in Figure 8.
The test of blocking agent degree of filling is carried out using " the fine sight visualized experiment platform of Gas-water phases seepage flow ".According to practical work
Journey condition injects blocking agent into pore structure with different charge velocities, when blocking agent system is injected, records when clapping.To two phase boundaries
Surface current speed, fluid distrbution and saturation degree are calculated and are analyzed.
3D printing model is placed on experiment porch, to inject SP8 blocking agent, charge velocity 2ml/min, using constant speed
Rate injection.Blocking agent is extracted with by being analyzed injection process pictorial information using high speed camera real-time recording injection process
Degree of filling in injection process.If Fig. 9-12 shows, using the charge velocity of 2ml/min, blocking agent SP8 can realize that Isolate model injects
Degree of filling 83.68%.
Claims (7)
1. a kind of blocking agent degree of filling test method, it includes following steps:
(1) stratum true core is obtained, Ultra-cryofreezing preservation is so that the irreducible water in rock core volatilizees；
(2) according to result of core analysis, low temperature drills through the rock core section for reflecting different level water drive bands, freezen protective；
(3) rock core section is scanned using high-precision Microfocus X-ray X-ray CT, to obtain internal structure, such as hole and particle
Distribution；And rock core internal structure slice map is obtained using matched image reconstruction software, storage is extracted and constructed herein on the basis of figure
The digital core model of layer porous media；
(4) there is the pore structure physical model of identical pore structure and required wetability using 3D printing technique production；
(5) utilize " the fine sight visualized experiment platform of Gas-water phases seepage flow " to carry out the test of blocking agent degree of filling: the platform is by fluid
Displacement is combined with imaging system, with carry out during two phase fluid flow it is real-time, in line imaging,
The image taking of two-phase interface, distribution is wherein carried out using high speed camera；
Wherein test specimen is saturated according to oil, the water bar part in Practical Project；
(6) test data (including video, image and data) obtained based on above-mentioned steps, to two-phase interface flow velocity, fluid point
Cloth and saturation degree are calculated and are analyzed；
(7) according to experimental result, the applicable blocking agent system of level water drive band is determined.
2. blocking agent degree of filling test method described in claim 1, wherein in step (3), from the three-dimensional data that scanning obtains
The representative layer along seepage direction is extracted, establishes model accordingly, and according to the variation of scanning core image parameter, carries out such as model
The extraction and analysis of ratio, geometry topological parameter etc. are shouted in hole, to construct the digital mould of different permeabilities and different permeability combinations
Type.
3. blocking agent degree of filling test method described in claim 1, wherein in step (5), fluid injection by essence control syringe pump into
Row control, is injected using constant current speed and is controlled；Wherein in test process, the constant of environment temperature and outlet border pressure field is controlled.
4. blocking agent degree of filling test method described in claim 1, wherein in step (5), according to Practical Project condition with difference
Injection pressure, inject blocking agent into the pore structure of test specimen；It when blocking agent system is injected, is recorded when clapping, until being injected into system
It is full of, wherein high-speed camera captures, identifies the migration process of unstable interface under different condition.
5. blocking agent degree of filling test method as claimed in claim 4 carries out weight wherein changing blocking agent type and two phase fluid flow condition
Retrial is tested.
6. blocking agent degree of filling test method described in claim 1, wherein in step (6), the peak face of fluid flow and boundary
Automatic identification, extraction are carried out, and batch is carried out to two-phase interface flow velocity, fluid distrbution and saturation degree and calculates and analyzes automatically；Base
The compactedness and saturation degree of blocking agent are calculated in digital picture, obtains distribution of blocking agent during oil-water two-phase fluid blocks, full
With degree, relative permeability.
7. blocking agent degree of filling test method described in claim 1, wherein carrying out needle for the rock core section of different level water drive bands
Degree of filling test to the blocking agent system of different level water drive bands, analyzes the applicable blocking agent system of different level water drive bands；It carries out
The combine analog of different level water drive bands obtains applicable blocking agent system combinations.
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| CN110410045A (en) * | 2019-06-24 | 2019-11-05 | 中国石油化工股份有限公司 | A kind of stifled tune method for ultra-high water cut stage oil reservoir |
| CN110410045B (en) * | 2019-06-24 | 2022-01-28 | 中国石油化工股份有限公司 | Plugging and adjusting method for oil reservoir in ultrahigh water cut period |
| CN112098274A (en) * | 2020-08-21 | 2020-12-18 | 山东科技大学 | Visual coal seam water injection two-phase seepage experiment system and method |
| CN114428001A (en) * | 2020-10-29 | 2022-05-03 | 中国石油化工股份有限公司 | Method for simulating different-grade high-permeability strip cores of reservoir through 3D printing |
| CN114428001B (en) * | 2020-10-29 | 2024-04-16 | 中国石油化工股份有限公司 | Method for simulating different-grade hypertonic strip core of reservoir through 3D printing |
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