CN106703742A - Method for matching particle size of elastic microspheres used for profile controlling and flooding of oil reservoir deep part with pore throat - Google Patents
Method for matching particle size of elastic microspheres used for profile controlling and flooding of oil reservoir deep part with pore throat Download PDFInfo
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Abstract
The invention provides a method for matching the particle size of elastic microspheres used for profile controlling and flooding of an oil reservoir deep part with a pore throat. The method includes the steps that an oil reservoir pore throat diameter distribution parameter is obtained; according to the diameter of the pore throat, a diameter-variable pipe with the diameter same as that of the pore throat, and the breakthrough pressure and deformation migration ability of the elastic microspheres with a certain initial particle size in the diameter-variable pipe under the different-expanded-ratio conditions are measured; through a nuclepore membrane experiment, the filtering time and filtering volume of the elastic microspheres with a certain particle size are obtained after the elastic microspheres pass through nuclepore membranes different in pore diameter; a filtering-time and filtering-volume curve is drawn, and the matching range of the particle size of the microspheres obtained by the deformation migration of the elastic microspheres into one nuclepore membrane with the diameter of the pore throat, the elastic microspheres with corresponding particle size are selected, and profile controlling and flooding of deep part is designed and implemented. According to the method for matching the particle size of the elastic microspheres used for profile controlling and flooding of the oil reservoir deep part with the pore throat, by effectively blocking off the oil reservoir pore throat, the expansion of the water flooding sweep range is achieved, the temperature resistance, salt tolerance and block-off effects are good, the block-off effect of the deformation migration of the elastic microspheres are given play to, and no damage is caused to a reservoir.
Description
Technical field
The present invention relates to oil field development technical field, a kind of oil deposit deep part transfer drive bullet is especially related to
Property microballoon particle diameter and pore throat matching process.
Background technology
How reservoir water drive improves oil recovery factor when developing, and is asking of receiving much attention in oil exploitation
Topic.In reservoir water drive development process, long-term due to injection water is washed away, and easily forms predominant pathway, is made
Into the inefficient cycle of injection water, the swept volume and Flooding Efficiency of influence injection water.Add in water is injected
Plus blocking agent, effectively closure is produced inside oil reservoir, injection water can seek new passage, so as to cause note
Enter current changed course, expand the swept volume of water drive, so as to improve oil recovery factor, reach waterflooding development
The middle purpose for increasing oil.The existing following patent document of such elastic microsphere is disclosed in the prior art.
Chinese patent CN101619118, discloses water flooding reservoir deep oil displacement and profile control polymer microballoon
And preparation method, it is on the basis of the method for preparing polymer microballoon using photopolymerization reaction, to pass through
Water-soluble reaction monomer, triggers emulsion polymerization in surfactant and solvent blending agent, forms chi
The very little microballoon in 50-500 nanometer ranges.After entering earth formation deep using the polymer microballoon of various concentrations
It is gradually swelling, the high permeable strip on stratum is effectively blocked, expand the swept volume of water.
Comment Chinese patent CN1807831, the interior for disclosing profile control and water shutoff technology using polymer microsphere
Valency method, describes indoor microcosmic evaluation and macroscopic evaluation method, has observed microballoon in simulated formation hole
Flow regime in larynx micromodel, determines plugging effect of the microballoon in core diverse location.
Disclosed in above-mentioned prior art is all that polymer microballoon is prepared and indoor plugging effect evaluation
Method, but not clear and definite polymer microballoon during deep profile correction to the closure principle of pore throat and
The system of selection of microspherulite diameter.The blocking agent of existing all kinds of expansion water drive swept volumes of waterflooding reservoir,
Influenceed by high temperature, high salt, reservoir damage etc., generally existing that plugging effect is not good, and timeliness is not long,
Oil deposit deep part plugging action is unable to reach, is this we have invented a kind of new oil deposit deep part transfer drive bullet
Property microballoon particle diameter and pore throat matching process, solve above technical problem.
The content of the invention
Deep profile correction is carried out it is an object of the invention to provide a kind of elastic microsphere for selecting corresponding particle diameter, is reached
To effectively closure deep reservoir, expand the oil deposit deep part transfer drive elastic microsphere that water drive swept volume is acted on
Particle diameter and pore throat matching process.
The purpose of the present invention can be achieved by the following technical measures：Oil deposit deep part transfer drive elastic microsphere
Particle diameter and pore throat matching process, particle diameter and the pore throat match party of the oil deposit deep part transfer drive elastic microsphere
Method includes：Step 1, obtains the distribution of pore throat in reservoirs diameter；Step 2 is straight according to pore throat diameter selection etc.
The reducer pipe in footpath, determines under certain initial particle elastic microsphere difference expansion multiple, in reducer pipe
Breakthrough pressure and deformation migration ability；Step 3, is tested by nucleopore membranes, determines certain particle diameter elasticity
Filtration time and filtration volume that microballoon passes through different pore size nucleopore membranes；Step 4, draws filtration volume
- filtration time curve, draws microspherulite diameter and pore throat that elastic microsphere deformation is migrated to nucleopore membranes
Diameter matches scope；Step 5, selects the elastic microsphere of corresponding particle diameter, carry out deep profile correction design,
Implement.
The purpose of the present invention can also be achieved by the following technical measures：
In step 1, according to reservoir cores intrusive mercury curve, pore throat in reservoirs diameter distributed constant is obtained.
In step 1, according to permeability-pore throat diameter Kozeny relational expressions, pore throat in reservoirs is obtained straight
Footpath distributed constant, permeability-pore throat diameter Kozeny relational expressions are：
In formula：D is pore throat diameter, um；
K is permeability, um2；
φ is porosity, %.
In step 1, oil well responding time is allocated according to water filling, obtains pore throat in reservoirs diameter distribution ginseng
Number.
In step 1, according to radial fluid flow formula, using Darcy's law, single fluid edge is calculated
A certain homogeneous reservoir from supply edge migrate to another mouthful of well needed for time be：
In formula：T is that oil well responding time, s are allocated in water filling；
Φ is porosity, %；
Re, RwIt is drainage radius and wellbore radius, cm；
K is permeability, μm2；
Μ is viscosity of injected water, mPas；
peAnd pwRespectively supply rim pressure and flowing bottomhole pressure (FBHP), 10-1MPa；
To ultra-high water-containing interval, it is believed that only water phase monophasic fluid flowing, this is calculated according to formula (2)
The K/ Φ in one stage；I.e.：
To ideal homogeneous rock, there is the hollow billet that n root radiuses are r in unit area, if its filtrational resistance
Filtrational resistance with actual rock is equal, then its pore throat is a diameter of：
In formula：D ' is the diameter of late high water content period reservoir venturi, μm2；
τ is tortuosity.
In step 3, it is distributed according to pore throat diameter, selects corresponding nucleopore membranes experiment, record is prominent
Under broken pressure, the elastic microsphere filtration time and filtration volume that pass through different pore size nucleopore membranes.
In step 4, by the particle diameter and the nucleopore membrane filtration reality of pore throat matching relationship of elastic microsphere
Test, after drawing 10 times of the elastic microsphere hydration swelling of certain initial particle, particle diameter reaches pore throat diameter
The 1-1.6 times of deformation migration closure criterion of matching relationship.
In steps of 5, the deformation migration closure according to elastic microsphere particle diameter and pore throat matching relationship is accurate
Then, the elastic microsphere of corresponding initial particle is selected, deep profile correction experimental design is carried out, can deformation migration
To oil deposit deep part, effectively closure is produced to pore throat, play deep profile correction effect.
The particle diameter of the oil deposit deep part transfer drive elastic microsphere in the present invention and pore throat matching process, are a kind of
It is related to the oil exploitation materials such as high molecular polymer, elastic granule class to block the side of oil reservoir predominant pathway
Method, according to Reservoir Permeability at this stage and pore throat diameter, according to particle diameter and the pore throat of elastic microsphere
With maxim of relation, the elastic microsphere of corresponding particle diameter is selected, under displacement pressure effect, produce deformation fortune
Move, effectively block reservoir, play deep profile correction, expand the work that water drive involves and improve oil recovery factor
With.The particle diameter of elastic microsphere of the present invention has the characteristics that with pore throat matching process：
1. it is different from the mechanism that high molecular polymerization species blocking agent expansion water drive involves, high molecular polymerization species
Blocking agent by increase the viscosity of injection water realize expanding water drive involve, heatproof, salt tolerant effect it is poor；And it is elastic
Microballoon involves by effectively closure reservoir pore throat realization expansion water drive, heatproof, salt tolerant and plugging effect are good；
2. the mechanism that water drive involves is expanded from the particulate species blocking agent such as flyash, clay different, rigid particles
By piling up closure pore throat between particle, the particle diameter for meeting rigid ball is the 1/7-1/3 of pore throat diameter to class blocking agent
The bridge formation criterion of matching relationship, and after elastic microsphere meets 10 times of hydration swelling, it is straight that particle diameter reaches pore throat
The deformation migration closure criterion of the 1-1.6 times of matching relationship in footpath.
3. it is different from the consolidation class blocking agent such as cement, waterglass, product after inorganic consolidation class blocking agent closure pore throat
Raw permanent closure, injury reservoir, and elastic microsphere has elasticity, according to particle diameter and pore throat matching relationship
Criterion, selects the elastic microsphere of corresponding particle diameter, can displacement when its elastic pressure is met or exceeded
To the farther place of reservoir, the plugging action of its deformation migration is played, to reservoir fanout free region.
Brief description of the drawings
Fig. 1 is the particle diameter and pore throat matching process of oil deposit deep part transfer drive elastic microsphere of the invention
The flow chart of one specific embodiment.
Fig. 2 is the breakthrough pressure change curve under elastic microsphere difference expansion multiple；
Fig. 3 is the elastic microsphere procedure chart that deformation passes through reducer pipe under breakthrough pressure；
Fig. 4 is nucleopore membranes filtration experiment installation drawing；
Fig. 5 is elastic microsphere bent with filtration time relation by the filtration volume of different pore size nucleopore membranes
Line；
Fig. 6 is elastic microsphere by Electronic Speculum schematic diagram after different pore size nucleopore membranes.
Specific embodiment
It is cited below particularly to enable above and other objects, features and advantages of the invention to become apparent
Go out preferred embodiment, and coordinate shown in accompanying drawing, be described in detail below.
As shown in figure 1, Fig. 1 is the particle diameter and pore throat of oil deposit deep part transfer drive elastic microsphere of the invention
The flow chart of method of completing the square, mainly includes the following steps that：
In step 101, according to reservoir cores Mercury injection test, permeability-pore throat diameter Kozeny relations
Formula or water filling allotment oil well responding time etc., obtain the distribution of pore throat in reservoirs diameter.
In step 102, isodiametric reducer pipe is selected according to pore throat diameter, test different expansion multiples
Under the conditions of, breakthrough pressure and deformation migration ability of the elastic microsphere in reducer pipe.
In the present invention, the breakthrough pressure experimental result of elastic microsphere difference expansion multiple is as shown in Figure 2.
Elastic microsphere initial particle 0.5um, when particle diameter is 10 times or so of initial particle after expansion, in the change of 5um
Breakthrough pressure is maximum in the pipe of footpath, reaches 0.08MPa；As expansion multiple is further added by, elastic microsphere is strong
Degree weakens, breakthrough pressure reduction.So when elastic microsphere particle diameter expands 10 times, intensity is high, pressure is broken through
Power is big, and plugging effect is good.From Fig. 3 elastic microspheres process that deformation passes through reducer pipe under breakthrough pressure
See, elastic microsphere deformation is spherical by still being reverted to after reducer pipe under breakthrough pressure, deformation migration is made
Make good use of.
In step 103, it is distributed according to pore throat diameter, selects corresponding nucleopore membranes experiment, record is prominent
Under broken pressure, the elastic microsphere filtration time and filtration volume that pass through different pore size nucleopore membranes.
In the present invention, nucleopore membranes filtration experiment device is as shown in figure 4, main by iron stand 1, constant temperature system
System 2, liquid container 3, balance 4, pressure regulator 5, air compressor 6, nucleopore membranes 7, clamper
8 and computer 9 constitute.Wherein iron stand 1 is used to fix the parts such as liquid container, and constant temperature system 2 is Sheng
Microspheres solution provides isoperibol in liquid container, and liquid container 3 is used to hold microspheres solution, balance 4
For measuring the mass change before and after microspheres solution filtering, pressure regulator 5 is used to control microspheres solution
Pressure size during by nucleopore membranes, when air compressor 6 is used to provide microspheres solution by nucleopore membranes
Pressure, nucleopore membranes 7 are the double medium filtration thin dielectric film of straight-through cylinder inclined hole, and clamper 8 is fixed
Sealing nucleopore membranes, computer 9 is used for Control release step and record experimental data.According to step 101
The pore throat in reservoirs diameter distribution of acquisition, the nucleopore membranes 7 of selection respective aperture, respectively 0.4 μm,
1.2 μm, 3.0 μm, 5.0 μm, 8.0 μm and 10.0 μm, thickness is 10 μm.By nucleopore membranes 7 spend from
Sub- water wetting, is laid on clamper 8, and leakproof is compressed with cushion rubber, loads onto liquid container 3, is screwed
Nucleopore membranes clamper 8, closes flowing water Valve.Grain after being 50mg/L, expand 10 times by concentration respectively
After footpath shakes up for the elastic microsphere solution 25ml of 5um, liquid container 3 is poured into, screw top cover.Start
Air compressor 6, adjusts pressure regulator 5, the pointer of precision pressure gauge is referred in 200kPa.It is quiet
1min or so is put, after determining device is without gas leakage, flowing water Valve is opened, filter liquor flows into beaker.It is real
During the filtering of the nucleopore membranes that the elastic microsphere solution for testing middle record filtering certain mass passes through different pore size
Between, the change in concentration by elastic microsphere before and after nucleopore membranes is as shown in table 1.
The elastic microsphere of particle diameter 5um is by change in concentration table before and after different pore size nucleopore membranes after the expansion of table 1
| Nucleopore membrane aperture/μm | Concentration before filter | 0.4 | 1.2 | 3.0 | 5.0 | 8.0 | 10 |
| Microspheres solution concentration/mg/L after filter | 50.0 | 2.56 | 2.56 | 4.3 | 17.2 | 42.6 | 50 |
In step 104, filtration volume-filtration time curve is drawn as shown in figure 5, drawing elastic microsphere
The pore throat diameter matches scope that solution passes through different pore size nucleopore membranes.
In the present invention, with scanning electron microscopic observation to retaining state of the elastic microsphere in nucleopore membranes such as
Shown in Fig. 6.The elastic microsphere that 25ml concentration is 50mg/L is respectively taken, after expansion during particle diameter 5um, is led to
There is notable difference in concentration and filtering rate when crossing the nucleopore membranes of different pore size.Elastic microsphere passes through
When 0.4um, 1.2um and 3 μm of nucleopore membranes, because the elastic microsphere particle diameter after expansion is much larger than core
The aperture of pore membrane, so that elastic microsphere is to be detained on nucleopore membranes surface, and is introduced into core
Pore membrane inside produces closure, and the filtering rate for causing it to pass through nucleopore membranes is larger, elastic microsphere after filtering
Solution concentration is very low, only 2.56-4.3mg/L.When elastic microsphere passes through 5 μm of nucleopore membranes, elasticity
Microballoon is removed and is partially covered on film surface, and has part microballoon to be blocked into micropore inside, is caused
Its elastic microsphere solution concentration only 17.2mg/L for passing through nucleopore membranes, filtering rate is minimum, closure
Effect is most strong.When elastic microsphere passes through the nucleopore membranes in 8 μm of aperture, the particle diameter of elastic microsphere is less than nucleopore
The aperture of film, its filtering rate substantially accelerates again, but microballoon is susceptible to pile up and builds bridge, produces closure,
It is 42.6mg/L to cause its elastic microsphere solution concentration for passing through nucleopore membranes.When elastic microsphere passes through hole
During the nucleopore membranes that 10 μm of footpath, under breakthrough pressure effect, easily by the nucleopore membranes that aperture is larger,
Plugging action can not be detained in nucleopore membranes, be still by the elastic microsphere concentration after nucleopore membrane filtration
50mg/L.Therefore, exist between the plugging action of elastic microsphere and nucleopore membranes pore size and necessarily match
Relation.The result synthesis display of Fig. 5, Fig. 6 and Biao 1, it is afterwards the elastic microsphere of 5um that particle diameter expands 10 times
With aperture for 5-8 μm of nucleopore membranes matching relationship is best, microballoon is detained generation closure in nucleopore membranes,
Before and after filtering between elastic microsphere solution concentration 17.2-42.6mg/L, play deformation and migrate to nucleopore membranes
Inside, blocks up without dead purpose.The particle diameter of described elastic microsphere and the nucleopore membranes of pore throat matching relationship
Filtration experiment, after drawing 10 times of the elastic microsphere hydration swelling of certain initial particle, particle diameter reaches hole
The deformation migration closure criterion of 1-1.6 times of matching relationship of larynx diameter.
In step 105, according to elastic microsphere particle diameter and pore throat matching relationship criterion, selection is corresponding initial
The elastic microsphere of particle diameter, carries out deep profile correction experimental design, can deformation migrate to oil deposit deep part, device to hole
Larynx produces effectively closure, plays deep profile correction effect.
It is below using several specific embodiments of the invention.
Embodiment one：
1. according to coring well intrusive mercury curve, Reservoir Permeability and the distribution of pore throat diameter are drawn；
2. it is distributed according to coring wellhole larynx diameter, selects isodiametric reducer pipe, determines certain initial grain
Under the elastic microsphere difference expansion multiple of footpath, breakthrough pressure and deformation the migration ability in reducer pipe.
3. according to pore throat diameter, the nucleopore membranes experiment of equal aperture is selected, certain grain is determined under breakthrough pressure
Filtration time and filtration volume that footpath elastic microsphere passes through different pore size nucleopore membranes.
4. filtration volume-filtration time curve is drawn, show that elastic microsphere deformation is migrated to nucleopore membranes
The microspherulite diameter in portion and pore throat diameter matches criterion.
5. according to elastic microsphere particle diameter pore throat deformation migration closure criterion, the bullet of corresponding initial particle is selected
Property microballoon, carries out deep profile correction experimental design, can deformation migrate and have to oil deposit deep part, to pore throat
Effect closure, plays deep profile correction effect.
Embodiment two：
1. most of oil reservoirs lack coring well data, it is impossible to carry out intrusive mercury curve test pore throat in reservoirs diameter
Distribution, can determine predominant pathway permeability, according to Kozeny empirical equations (1) according to log
Obtain pore throat diameter；
In formula：D is pore throat diameter, um；
K is permeability, um2；
φ is porosity, %.
2. the diameter distribution for being calculated according to permeameter, selects isodiametric reducer pipe, determines certain first
Under beginning particle diameter elastic microsphere difference expansion multiple, breakthrough pressure and deformation the migration energy in reducer pipe
Power.
3. according to pore throat diameter, the nucleopore membranes experiment of equal aperture is selected, certain grain is determined under breakthrough pressure
Filtration time and filtration volume that footpath elastic microsphere passes through different pore size nucleopore membranes.
4. filtration volume-filtration time curve is drawn, show that elastic microsphere deformation is migrated to nucleopore membranes
The microspherulite diameter in portion and pore throat diameter matches criterion.
5. according to elastic microsphere particle diameter pore throat deformation migration closure criterion, the bullet of corresponding initial particle is selected
Property microballoon, carries out deep profile correction experimental design, can deformation migrate and have to oil deposit deep part, to pore throat
Effect closure, plays deep profile correction effect.
Embodiment three：
Long-term injecting water exploitation can increase the main seepage flow throat radius of reservoir, and the coring well in certain period and
The logs such as permeability, it is impossible to react long-term injecting water development phase pore throat in reservoirs diameter change.Assuming that
Long-term injecting water development process is radial fluid flow, can be with using the allotment responding time between injection-production well group
Description development late stage absorbs water by force the pore throat diameter change rule of reservoir.
1. according to radial fluid flow formula, using Darcy's law, calculate single fluid and stored up along a certain homogeneous
Collect layer is from the time supplied needed for edge migrates to another mouthful of well：
In formula：T is that oil well responding time, s are allocated in water filling；
Φ is porosity, %；
Re, RwIt is drainage radius and wellbore radius, cm；
K is permeability, μm2；
Μ is viscosity of injected water, mPas；
peAnd pwRespectively supply rim pressure and flowing bottomhole pressure (FBHP), 10-1MPa。
To ultra-high water-containing interval, only water phase monophasic fluid flowing can be approximately considered, according to formula (2)
The K/ Φ in this stage can be calculated；I.e.：
To ideal homogeneous rock (have in unit area n root radiuses be r hollow billet), if its filtrational resistance with
The filtrational resistance of actual rock is equal, then its pore throat is a diameter of：
In formula：D ' is the diameter of late high water content period reservoir venturi, μm2；
Τ is tortuosity.
2. the pore throat diameter distribution that oil well responding time is calculated is allocated according to water filling, is selected isodiametric
Reducer pipe, determines under certain initial particle elastic microsphere difference expansion multiple, the breakthrough in reducer pipe
Pressure and deformation migration ability.
3. according to pore throat diameter, the nucleopore membranes experiment of equal aperture is selected, certain grain is determined under breakthrough pressure
Filtration time and filtration volume that footpath elastic microsphere passes through different pore size nucleopore membranes.
4. filtration volume-filtration time curve is drawn, show that elastic microsphere deformation is migrated to nucleopore membranes
The microspherulite diameter in portion and pore throat diameter matches criterion.
5. according to elastic microsphere particle diameter pore throat deformation migration closure criterion, the bullet of corresponding initial particle is selected
Property microballoon, carries out deep profile correction experimental design, can deformation migrate and have to oil deposit deep part, to pore throat
Effect closure, plays deep profile correction effect.
Claims (8)
1. the particle diameter of oil deposit deep part transfer drive elastic microsphere and pore throat matching process, it is characterised in that the oil reservoir
The particle diameter of deep profile correction elastic microsphere includes with pore throat matching process：
Step 1, obtains the distribution of pore throat in reservoirs diameter；
Step 2, isodiametric reducer pipe is selected according to pore throat diameter, determines certain initial particle elasticity micro-
Under ball difference expansion multiple, breakthrough pressure and deformation the migration ability in reducer pipe；
Step 3, is tested by nucleopore membranes, is determined certain particle diameter elastic microsphere and is passed through different pore size nucleopore membranes
Filtration time and filtration volume；
Step 4, draws filtration volume-filtration time curve, show that elastic microsphere deformation is migrated to nucleopore membranes
Internal microspherulite diameter and pore throat diameter matches scope；
Step 5, selects the elastic microsphere of corresponding particle diameter, carries out deep profile correction design, implements.
2. the particle diameter of oil deposit deep part transfer drive elastic microsphere according to claim 1 and pore throat matching process,
Characterized in that, in step 1, according to reservoir cores intrusive mercury curve, obtaining the distribution of pore throat in reservoirs diameter
Parameter.
3. the particle diameter of oil deposit deep part transfer drive elastic microsphere according to claim 1 and pore throat matching process,
Characterized in that, in step 1, according to permeability-pore throat diameter Kozeny relational expressions, obtaining oil reservoir hole
Larynx diameter distributed constant, permeability-pore throat diameter Kozeny relational expressions are：
In formula：D is pore throat diameter, um；
K is permeability, um2；
φ is porosity, %.
4. the particle diameter of oil deposit deep part transfer drive elastic microsphere according to claim 1 and pore throat matching process,
Characterized in that, in step 1, oil well responding time is allocated according to water filling, pore throat in reservoirs diameter is obtained
Distributed constant.
5. the particle diameter of oil deposit deep part transfer drive elastic microsphere according to claim 4 and pore throat matching process,
Characterized in that, in step 1, according to radial fluid flow formula, using Darcy's law, calculating single
Fluid along a certain homogeneous reservoir from supply edge migrate to another mouthful of well needed for time be：
In formula：T is that oil well responding time, s are allocated in water filling；
Φ is porosity, %；
Re, RwIt is drainage radius and wellbore radius, cm；
K is permeability, μm2；
Μ is viscosity of injected water, mPas；
peAnd pwRespectively supply rim pressure and flowing bottomhole pressure (FBHP), 10-1MPa；
To ultra-high water-containing interval, it is believed that only water phase monophasic fluid flowing, this is calculated according to formula (2)
The K/ Φ in stage；I.e.：
To ideal homogeneous rock, there is the hollow billet that n root radiuses are r in unit area, if its filtrational resistance and reality
The filtrational resistance of border rock is equal, then its pore throat is a diameter of：
In formula：D ' is the diameter of late high water content period reservoir venturi, μm2；
τ is tortuosity.
6. the particle diameter of oil deposit deep part transfer drive elastic microsphere according to claim 1 and pore throat matching process,
Characterized in that, in step 3, being distributed according to pore throat diameter, corresponding nucleopore membranes experiment, note are selected
Record elastic microsphere passes through different pore size nucleopore membranes under breakthrough pressure filtration time and filtration volume.
7. the particle diameter of oil deposit deep part transfer drive elastic microsphere according to claim 1 and pore throat matching process,
Characterized in that, in step 4, by the particle diameter and the nucleopore membranes mistake of pore throat matching relationship of elastic microsphere
Filter experiment, after drawing 10 times of the elastic microsphere hydration swelling of certain initial particle, particle diameter reaches pore throat diameter
1-1.6 times of matching relationship deformation migration closure criterion.
8. the particle diameter of oil deposit deep part transfer drive elastic microsphere according to claim 7 and pore throat matching process, it is characterised in that
In steps of 5, according to the deformation migration closure criterion of elastic microsphere particle diameter and pore throat matching relationship, the corresponding initial grain of selection
The elastic microsphere in footpath, carries out deep profile correction experimental design, can deformation migrate to oil deposit deep part, to pore throat produce effectively closure,
Play deep profile correction effect.
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| CN105806750A (en) * | 2016-03-03 | 2016-07-27 | 中国石油天然气股份有限公司 | Measurement method of matching between microspheres and pore throats of oil reservoir |
| CN109142162A (en) * | 2018-09-07 | 2019-01-04 | 中国石油化工股份有限公司 | A kind of method of quick judgement polymer solution concentration and oil reservoir matching |
| CN109138905A (en) * | 2018-09-14 | 2019-01-04 | 山东石大油田技术服务股份有限公司 | With the Selective Water Plugging method of gel micro-sphere |
| CN109915115A (en) * | 2019-04-02 | 2019-06-21 | 中国石油大学(华东) | Determine the method and device of the closure matching relationship of elastic granule and formation pore throat |
| CN110094201A (en) * | 2019-03-14 | 2019-08-06 | 中国石油天然气股份有限公司 | A kind of polymer microballoon deep profile correction injection partial size selection method |
| CN110553971A (en) * | 2019-09-24 | 2019-12-10 | 中国海洋石油集团有限公司 | Method for measuring microsphere plugging performance |
| CN110608989A (en) * | 2019-10-11 | 2019-12-24 | 西安石油大学 | Screening method for applicability of nanoscale polymer microspheres in medium-high permeability oil reservoirs |
| CN111929218A (en) * | 2020-08-05 | 2020-11-13 | 中海石油(中国)有限公司 | Method for evaluating matching performance of polymer microspheres and reservoir |
| CN112069620A (en) * | 2020-09-07 | 2020-12-11 | 中国石油大学(华东) | Method and device for determining migration degree of natural gas hydrate reservoir particles |
| CN113092325A (en) * | 2021-03-29 | 2021-07-09 | 中海石油(中国)有限公司 | Method for determining matching of heterogeneous system particle size distribution and oil reservoir pore throat size distribution |
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| CN112069620A (en) * | 2020-09-07 | 2020-12-11 | 中国石油大学(华东) | Method and device for determining migration degree of natural gas hydrate reservoir particles |
| CN112069620B (en) * | 2020-09-07 | 2023-01-13 | 中国石油大学(华东) | Method and device for determining migration degree of natural gas hydrate reservoir particles |
| CN113092325B (en) * | 2021-03-29 | 2022-05-03 | 中海石油(中国)有限公司 | Method for determining matching of heterogeneous system particle size distribution and oil reservoir pore throat size distribution |
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