CN109385255A - One kind bridging blocking agent for the adjustable self assembly of Fractured LOW PERMEABILITY RESERVOIR sealing ratiod - Google Patents
One kind bridging blocking agent for the adjustable self assembly of Fractured LOW PERMEABILITY RESERVOIR sealing ratiod Download PDFInfo
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- CN109385255A CN109385255A CN201811214267.5A CN201811214267A CN109385255A CN 109385255 A CN109385255 A CN 109385255A CN 201811214267 A CN201811214267 A CN 201811214267A CN 109385255 A CN109385255 A CN 109385255A
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- 239000002981 blocking agent Substances 0.000 title claims abstract description 42
- 238000001338 self-assembly Methods 0.000 title abstract description 44
- 230000035699 permeability Effects 0.000 title abstract description 22
- 238000007789 sealing Methods 0.000 title abstract description 22
- 239000002245 particle Substances 0.000 claims abstract description 121
- 239000002313 adhesive film Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 17
- 230000000903 blocking effect Effects 0.000 claims abstract description 13
- 230000009471 action Effects 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 30
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 7
- 229920002401 polyacrylamide Polymers 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 239000000375 suspending agent Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 229920002472 Starch Polymers 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 235000019698 starch Nutrition 0.000 claims description 4
- 239000008107 starch Substances 0.000 claims description 4
- 235000013399 edible fruits Nutrition 0.000 claims description 3
- 229920005990 polystyrene resin Polymers 0.000 claims description 3
- 239000006004 Quartz sand Substances 0.000 claims description 2
- 239000010881 fly ash Substances 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- 229920002907 Guar gum Polymers 0.000 claims 2
- 229910000831 Steel Inorganic materials 0.000 claims 2
- 229960002154 guar gum Drugs 0.000 claims 2
- 235000010417 guar gum Nutrition 0.000 claims 2
- 239000000665 guar gum Substances 0.000 claims 2
- 239000010959 steel Substances 0.000 claims 2
- 229920013818 hydroxypropyl guar gum Polymers 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 239000012528 membrane Substances 0.000 abstract description 5
- 238000010008 shearing Methods 0.000 abstract description 2
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 14
- 238000002474 experimental method Methods 0.000 description 10
- 239000004593 Epoxy Substances 0.000 description 7
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 7
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 238000004062 sedimentation Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000006087 Silane Coupling Agent Substances 0.000 description 3
- 229910052681 coesite Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- -1 polyphenylene Polymers 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- 208000010392 Bone Fractures Diseases 0.000 description 2
- 244000007835 Cyamopsis tetragonoloba Species 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 206010017076 Fracture Diseases 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000008398 formation water Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 241000790917 Dioxys <bee> Species 0.000 description 1
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 description 1
- 229920000265 Polyparaphenylene Polymers 0.000 description 1
- 229910003978 SiClx Inorganic materials 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/5045—Compositions based on water or polar solvents containing inorganic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5086—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/04—Hulls, shells or bark containing well drilling or treatment fluids
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/18—Bridging agents, i.e. particles for temporarily filling the pores of a formation; Graded salts
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses one kind to bridge blocking agent for the adjustable self assembly of Fractured LOW PERMEABILITY RESERVOIR sealing ratiod.Self assembly bridges blocking agent and is made of kernel and the overlay film being coated on outside kernel；Overlay film is the internal layer softening adhesive film and outer layer rigid film being successively coated on outside kernel；After outer layer rigid film is damaged, exposed internal layer softening adhesive film softening expansion when temperature is higher than its softening point；Kernel is made of level-one rigidity plugging material, and under the softening expansion of internal layer softening adhesive film, level-one rigidity plugging material can form the skeleton of self-assembly by being bonded to build bridge in the hole throat on stratum.At normal temperatures and pressures, blocking agent of the present invention exists in the form of independent particle, blocking agent is avoided in the blocking of near wellbore zone, as blocking agent enters reservoir deep, when temperature reaches target reservoir temperature, since blocking agent outer membrane is in damaged under journey shearing force, functional inner membrance heat softening, each monolithic kernel sticks together each other under the action of function inner membrance, so that the bridge blinding effect of interior nuclear skeleton is more stable.
Description
Technical field
The present invention relates to a kind of self assemblies for Fractured LOW PERMEABILITY RESERVOIR to bridge blocking agent, and in particular to one kind is used for crack
Property the adjustable self assembly of LOW PERMEABILITY RESERVOIR sealing ratiod bridge blocking agent, belong to oil field technology of reservoir sweep field.
Background technique
For China's oil external dependence degree in 2015 up to 60%, Oil Strategy is extremely urgent safely.According to statistics, the whole world
70% crude oil comes from old filed.China is hypotonic, the hypotonic reserves exploitation scale of spy increases year by year, and yield increases year by year, it has also become
The main body of upper production.Low-permeability oil deposit has been developed and utilized, its recovery ratio is further increased, Chinese national economy will be to maintain and continued
The important basic guarantee of development.Fracture development is a main feature of China's low-permeability oil deposit, and ease is altered in control becomes hypotonic
Saturating oil reservoir improves the bottleneck of the technology development of recovery ratio.Not only ease is altered in crack, and the Relative High Permeability layer in hyposmosis matrix also can be by
It gradually forms predominant pathway and ultimately forms and secondary alter ease.Therefore it needs to provide a kind of novel bridge formation particle, to overcome conventional
The sealing characteristics of grain shape blocking agent non-selectivity and the technological deficiency for causing reservoir damage.
Summary of the invention
The object of the present invention is to provide a kind of self assemblies for Fractured LOW PERMEABILITY RESERVOIR to bridge blocking agent, can be applied to split
Reduce the permeability of strong fluid-channeling channel in seam property LOW PERMEABILITY RESERVOIR to improve sweep efficiency, have " infuse into, block up, block up quasi-,
Afford to use " the characteristics of, can be widely used for channelling after improving Fractured LOW PERMEABILITY RESERVOIR waterflooding development leads to water flooding effectiveness difference
Target reservoir.
To realize above-mentioned target, the present invention is on the basis of filling and blocking theory and theoretical closure of building bridge, by level-one rigidity
Plugging material is combined with time level-one softener material.
Specifically, the bridge joint particle blocking agent provided by the present invention for Fractured LOW PERMEABILITY RESERVOIR by kernel and is coated on
Overlay film composition outside the kernel；
The overlay film is the internal layer softening adhesive film and outer layer rigid film being successively coated on outside the kernel；
After the outer layer rigid film is damaged, exposed internal layer softening adhesive film softens when temperature is higher than its softening point
Expansion；
The kernel is made of level-one rigidity plugging material, under the softening expansion of internal layer softening adhesive film,
The level-one rigidity plugging material can form the skeleton of self-assembly by being bonded to build bridge in the hole throat on stratum.
In the bridge joint particle blocking agent, the average grain diameter of the bridge joint particle is 100~120 μm；
Internal layer softening adhesive film with a thickness of 1.5~2.0 μm, the outer layer rigidity film with a thickness of 1.5~2.0 μ
m。
In the bridge joint particle blocking agent, the level-one rigidity plugging material is haydite, fruit stone, flyash or quartz sand etc.,
The haydite can be industrial goods haydite, and partial size is 100~120 μm.
In the bridge joint particle blocking agent, the internal layer softening adhesive film is made of modified epoxy；
The modified epoxy is prepared by the following method: the epoxy resin of liquid being heated into certain temperature, is being stirred
Modified Nano SiO is added under state2, wait finish, stir evenly, high speed dispersion, after 2~3h of reaction time, after reactant discoloration
Heating equipment is removed, products therefrom is the modified epoxy；
The modified Nano SiO2Additional amount is the 5%~20% of the epoxy resin quality；
The modified Nano SiO2It can be silane coupler modified Nano-meter SiO_22, Silane coupling agent KH550 is such as used, specifically
Conventional method can be used to be modified, such as: dispersing the silane coupling agent in ethyl alcohol, the dioxy for being scattered in dispersing agent is added
SiClx stirs evenly.
The modified Nano SiO2Partial size be 30~50nm.
The outer layer rigidity film is made of polyphenylene resin, i.e. polystyrene resin, and molecular weight is 100~500.
Invention further provides the preparation methods of the bridge joint particle blocking agent, include the following steps:
The level-one rigidity plugging material is processed into particle；Use the spraying of particle surface described in coating normal direction to be formed
State internal layer softening adhesive film；Finally the outer layer rigid film is formed in the particle surface overlay film.
Specifically ball crusher, which can be used, is processed into circular granular, and particle diameter distribution is in 100 microns.
Such as coating step can be carried out in a fluidized bed: the particle being placed in fluidized bed, and it is made to be evenly distributed on sky
In gas, the material (such as modified epoxy) of internal layer softening adhesive film is sprayed from different directions, carries out subsequent cover to dry tack free
Film.
The dry uniform overlay film of particle is dried for standby to the end of overlay film according to required strength control overlay film thickness.
When blocking Fractured LOW PERMEABILITY RESERVOIR using the bridge joint particle blocking agent, it can carry out in accordance with the following steps:
The bridge joint particle blocking agent is injected into the stratum of Fractured LOW PERMEABILITY RESERVOIR, that is, realizes fracture LOW PERMEABILITY RESERVOIR
It blocks.
In above-mentioned method for blocking, using starch gel foam, guanidine sol solution or polymer solution as the bridge joint
The suspending agent of grain blocking agent.
In above-mentioned method for blocking, the guanidine sol solution can be hydroxypropyl guar solution, and mass percentage is
0.05%~1%；
The polymer solution can be Partially Hydrolyzed Polyacrylamide Solution, mass percentage be 0.05%~
0.3%.
In above-mentioned method for blocking, the injection rate of the bridge joint particle blocking agent is 0.5~3.0ml/min；
The injection rate of the bridge joint particle blocking agent is 0.03PV~0.08PV；
The mass concentration of the bridge joint particle blocking agent is 0.5%~10%.
Self assembly bridge joint particle blocking agent of the present invention is mainly made of kernel and overlay film two parts: one, the kernel of blocking agent is by one
The rigid plugging material composition of grade, rigid material can occupy most of space of fluid-channeling channel, in the hole on stratum by filling,
The skeleton of bridging action formation plugged zone；Two, the overlay film of blocking agent has inside and outside two membranes, and wherein outer membrane is rigid film, inner layer film
It is the functional membrane there are critical temperature value.At normal temperatures and pressures, blocking agent exists in the form of independent particle, and avoiding problems blocking agents
Blocking near wellbore zone, as blocking agent enters reservoir deep, when temperature reaches target reservoir temperature, due to blocking agent outer membrane
Damaged under journey shearing force, functional inner membrance heat softening, each monolithic kernel under the action of function inner membrance that
This sticks together, so that the bridge blinding effect of interior nuclear skeleton is more stable.And overlay film can be filled in as time level-one softener material
The hole of skeleton enhances plugging effect to strengthen the intensity of plugged zone.
Detailed description of the invention
Fig. 1 is the structural schematic diagram and micro-structure diagram that self assembly bridges particle.
Fig. 2 is that self assembly bridges particle in intrapore bridge blinding bonding form.
Fig. 3 is that self assembly bridge joint particle is bonded scanning electron microscope (SEM) photograph in rock core.
Fig. 4 is that self assembly bridges micromorphology variation of particle during closure, and wherein Fig. 4 (a) is the original shape of particle
State, Fig. 4 (b) are the form after outer layer rigid film falls off, and Fig. 4 (c) is the bonding particle under softening temperature；Fig. 4 (d) is viscous for particle
Junctor.
Fig. 5 is the convered structure that self assembly bridges particle.
Specific embodiment
Experimental method used in following embodiments is conventional method unless otherwise specified.
The materials, reagents and the like used in the following examples is commercially available unless otherwise specified.
The present invention proposes one for the plugging technology of the caused fluid-channeling channel permeability reduction of particle migration bonding bridge formation
The adjustable novel self assembly of kind permeability bridges blocking agent system, and the reservoir permeability that optimization injection condition reaches after blocking is adjustable
Effect.
One, the preparation of self assembly bridge joint particle
Embodiment 1,
For different reservoir conditions, design produces salt tolerant 200000mg/L, and temperature is fitted within the scope of 30 DEG C~200 DEG C
8 kinds of self assemblies bridge particles: Q30-45, Q50-60, Q60-75, Q80-90, Q90-120, Q120-150, Q150-180,
Q180-200.The structural schematic diagram (left figure) and micro-structure diagram (right figure) of prepared self assembly bridge joint particle are as shown in Figure 1.
Specifically prepare by the following method:
Lightness haydite is processed into circular granular with ball crusher, particle diameter distribution is uniformly divided in 100 microns, by particle
Cloth in air, sprays different temperatures modified epoxy, and sprinkling carries out subsequent operation for several times, to dry tack free.It will be dry
Coating particles uniformly apply polystyrene resin (molecular weight 104.15), according to required strength control overlay film thickness, to overlay film
End is dried for standby.
The different temperatures modified epoxy wherein used is prepared by the following method:
The epoxy resin of liquid is separately heated to different temperatures (30~200 DEG C, soften bonding temp), in stirring
The lower 10% modified Nano SiO that epoxy resin quality is added2(Silane coupling agent KH550 modification obtains), partial size is 30~
50nm, Nano-meter SiO_2 to be modified2It finishes, stirs evenly, high speed dispersion after reaction time 2.5h, removes heating after reactant discoloration
Equipment, products therefrom are different temperatures modified epoxy.
Wherein Q30-45 particle is applicable within the scope of 30 DEG C~45 DEG C；Q50-60 particle is fitted within the scope of 50 DEG C~60 DEG C
With；Q60-75 particle is applicable within the scope of 60 DEG C~75 DEG C；Q80-90 particle is applicable within the scope of 80 DEG C~90 DEG C；Q90-120
Particle is applicable within the scope of 90 DEG C~120 DEG C；Q120-150 particle is applicable within the scope of 120 DEG C~150 DEG C；Q150-180 particle
It is applicable within the scope of 150 DEG C~180 DEG C；Q180-200 particle is applicable within the scope of 180 DEG C~200 DEG C, i.e., the composition of 8 kinds particles
Identical, difference is in different softening temperatures (the softening bonding temp set when preparing modified resin film).
To meet construction site, the especially demand of offshore platform online injection, 8 kinds of particles of preparation are lightweight self assembly
Particle is bridged, surface area mean diameter is about 100 microns, and specific gravity is about 1.09mg/cm3, internal layer soften adhesive film with a thickness of
1.50~2.0 μm, outer layer rigidity film with a thickness of 1.5~2.0 μm.
Two, self assembly bridge joint particle suspension system determines
Suspending agent using starch gel foam, guanidine sol solution, polymer solution as bridge joint particle blocking agent tests blocking agent
Suspendability in different suspending agents.
Embodiment 2,
200ml starch gel solution is prepared, the foaming agent lauryl sodium sulfate of 0.3wt% is added in gel initial set,
3min is stirred at revolving speed 7000r/min with Waring Blender blender, and 0.5wt%~10wt% self assembly bridge joint is added
Particle Q50-60 pours into observation blocking agent Granula Subsidence Time in the graduated cylinder of 1000ml after mixing evenly.
As a result: bottom is deposited without particle in room temperature lower 7 days, after bubble collapse, the further consolidated particles of gel, therefore,
Particle does not settle in gel foam.
Sedimentation experiment same as described above is carried out to remaining 7 kinds of self assembly bridge joint particle, experimental result and self assembly bridge
The result of particle Q50-60 is without substantial differences.
Embodiment 3,
Prepare the hydroxypropyl guar solution of 0.05wt%, 0.5wt%, 1wt%；0.5wt%~10wt% is weighed with balance
Self assembly bridge particle Q50-60, be mixed evenly in 200ml beaker with guanidine sol solution.Mixed solution is placed in
In 100ml tool plug graduated cylinder, stand at normal temperatures and pressures, observation bridge joint particle from it is required when starting to settle completely to particle when
Between, and record sedimentation rate.
As a result: suspensibility of the particle in guanidine sol solution reaches 90% or more, and only 10% particle is settled.Particle is dense
Degree is bigger, disperses in guanidine sol solution more stable.This is because the design of the special overlay film of particle and low-density kernel, so that
Grain probability impinging one another increases, and increases its suspending power by adhesive bond.
Sedimentation experiment same as described above is carried out to remaining 7 kinds of self assembly bridge joint particle, experimental result and self assembly bridge
The result of particle Q50-60 is without substantial differences.
Embodiment 4,
Prepare the Partially Hydrolyzed Polyacrylamide Solution of 0.05wt%, 0.1wt%, 0.2wt%, 0.3wt%, average molecular
Quality 2200 × 104；With balance weigh 0.5wt%~10wt% self assembly bridge particle Q50-60, with polymer solution in
It is mixed evenly in 200ml beaker.Suspension system is placed in 100ml tool plug graduated cylinder, is stood at normal temperatures and pressures, observation is outstanding
The floating body system time required when particle blocking agent settles completely since standing, and record sedimentation rate.
As a result: suspensibility of the particle in various concentration polymer solution reaches 90% or more, and only 10% particle has occurred
Sedimentation.Under stirring state, particle, which can be evenly distributed on, non-rising in suspending agent also not to sink.Suspendability and hanging in guanidine glue
Buoyancy can be similar, is similarly that granule density is bigger, and dispersion performance of the particle in polymeric system is better.
Sedimentation experiment same as described above is carried out to remaining 7 kinds of self assembly bridge joint particle, experimental result and self assembly bridge
The result of particle Q50-60 is without substantial differences.
Embodiment 5,
Under different reservoir temperature environment, since temperature has reached the softening point of particle blocking agent overlay film, each monomer is in overlay film
Under the action of stick together each other, formed bonding particle stack.Particles stick body is determined by experiment at different temperatures
Heat resistance, salt resistant character and bonding validity period.
100mL Q50-60 particle stack is prepared with the simulated formation water of 200g/L salinity, wherein granular mass accounts for
80%, simulated formation water accounts for 20%, is placed in reaction kettle and is forced into 20MPa with jack.The particle stack of compacting is distinguished
It is placed in 30 DEG C~200 DEG C and stands observation 12 months.It is taken out after reaching the stipulated time, observing response kettle endoparticle blocking agent bonding
Situation.Particle stack, which still consolidates bonding, to be existed, as a result as shown in Fig. 2, showing the heat-resistant salt-resistant performance for having excellent.
Experiment same as described above is carried out to remaining 7 kinds of self assembly bridge joint particle, experimental result and self assembly bridge particle
The result of Q50-60 is without substantial differences.
Three, experiment is blocked
Optimization to injection parameter further comprises: injection rate, particle implantation concentration, particle injection rate, suspending agent are dense
The relationship of degree and sealing ratiod.
Embodiment 6,
Consider that the plugging effect of injection rate optimizes comparison.
Using sandpipe model, (permeability is 50000 × 10-3μm2), investigate under different injection rates (0.5ml/min,
1.0ml/min, 2.0ml/min, 3.0ml/min) self assembly bridge joint particle Q50-60 block system sealing characteristics, aaerosol solution
For 0.2% partially hydrolyzed polyacrylamide (PHPA).As a result: the sealing ratiod of 0.5ml/min is 94.36%, the sealing ratiod of 1.0ml/min is
97.89%, the sealing ratiod of 2.0ml/min is 97.26%, the sealing ratiod of 3.0ml/min is 87.75%.As it can be seen that with injection speed
Degree increases, and particle can migrate to farther distance, and speed continues growing when reaching 3ml/min under strong fluid scouring
The stability of grain convered structure is affected to some extent.From subsequent waterflooding curve, particle is carried out with the injection rate of 1ml/min
When the injection of blocking agent system, particle migration is bonded better off, and WATER DISPLACEMENT CURVES quickly reaches steadily.
Sealing characteristics test same as described above is carried out to remaining 7 kinds of self assembly bridge joint particle, is as a result bridged with self assembly
The result of particle Q50-60 is without substantial differences.
Embodiment 7,
System is blocked to the adaptability of injection rate in order to investigate Q50-60 self assembly particle, is had chosen respectively in experiment
The injection rate of 0.6PV, 1.0PV, 1.2PV, 1.6PV, wherein the concentration of Q50-60 self assembly particle is 5% (particle in system
Injection rate is distributed as 0.03PV, 0.05PV, 0.06PV, 0.08PV), aaerosol solution is 0.15% partially hydrolyzed polyacrylamide (PHPA).
Using sandpipe model, (permeability is 50000 × 10-3μm2), evaluate influence of the injection rate to sealing characteristics.As a result: blocking system
Shut-off capacity is the increase with injection rate and enhances.Sealing ratiod is 81.2% when 0.6PV；It is 1PV (particle volume in injection rate
When accounting for 5% or more pore volume), sealing ratiod reaches 90% or more；When injection rate is 1.2PV, the sealing ratiod of granular system is
96.65%；When injection rate increases to 1.6PV, sealing ratiod rises to 99.47%.
Sealing characteristics test same as described above is carried out to remaining 7 kinds of self assembly bridge joint particle, is as a result bridged with self assembly
The result of particle Q50-60 is without substantial differences.
Embodiment 8,
With sandpipe model, (permeability is 50000 × 10-3μm2), various concentration Q50-60 self assembly particle (2%, 5%,
10%), aaerosol solution is 0.15% partially hydrolyzed polyacrylamide (PHPA), investigates the sealing characteristics that self assembly particle blocks system.Knot
Fruit: granule density is 5% or more, and sealing ratiod reaches 90% or more.
Sealing characteristics test same as described above is carried out to remaining 7 kinds of self assembly bridge joint particle, is as a result bridged with self assembly
The result of particle Q50-60 is without substantial differences.
Embodiment 9,
Experiment uses 10cm × 4.5cm × 4.5cm artificial core model, permeability 51305mD.Q50-60 particle is stifled
Agent injection rate is 1ml/min, and aaerosol solution is 0.15% partially hydrolyzed polyacrylamide (PHPA).Rock core is still in experiment temperature respectively
It is placed 24 hours at 300 DEG C of degree, the steam for being then carried out continuously 6PV drives.As a result: sealing ratiod still reaches 98% or more, in rock
Bonding scanning electron microscope (SEM) photograph is as shown in figure 3, show that the system has good thermal stability and abrasion resistance in the heart.
During closure, the micromorphology of Q50-60 particle is as shown in figure 4, wherein Fig. 4 (a) is particle original form, Fig. 4
(b) form after falling off for outer layer rigid film, Fig. 4 (c) are the bonding particle under softening temperature；Fig. 4 (d) is particles stick body,
It is as shown in Figure 5 that it is bonded form.The variation of above-mentioned particle shape confirms the closure principle of particle blocking agent of the present invention: i.e. outer layer is rigid
Property film it is damaged after, exposed internal layer softening adhesive film softening expansion when temperature is higher than its softening point, and then the hole on stratum
The skeleton of self-assembly is formed by bonding to build bridge in throat.
The present invention provides one kind to be applied to water caused by low-permeability oil deposit mesostroma layer middle and high infiltration permeable layers non-available water recycles
The novel bridge formation grain-type water shutoff agent for driving recovery ratio effect difference realizes selective shut-off Thief zone by design blocking agent injection parameter
Layer, permeability is adjustable after blocking up, and makes to block and retains its seepage flow flow conductivity again while alter channel by force, solve conventional blocking agent or
The shortcomings that blocking or blocking up incessantly.
Finally, it is noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.This
The those of ordinary skill in field it is understood that it can still modify to technical solution documented by previous embodiment, or
Technical characteristic therein is replaced on an equal basis, and these are modified or replaceed, it does not separate the essence of the corresponding technical solution
The spirit and scope of technical solution of various embodiments of the present invention, the scope of the present invention are limited by appended claims and its on an equal basis.
Claims (10)
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| CN109971443A (en) * | 2019-03-11 | 2019-07-05 | 中国石油化工股份有限公司 | A kind of three-phase froth envelope alters agent and preparation method thereof, thickened oil recovery tune blocking method |
| CN110118073A (en) * | 2019-06-12 | 2019-08-13 | 西南石油大学 | A kind of multistage plug classification blocking method suitable for fractured reservoir |
| CN112852392A (en) * | 2021-01-26 | 2021-05-28 | 嘉华特种水泥股份有限公司 | Preparation method of composite rigid plugging agent |
| CN113372889A (en) * | 2021-06-23 | 2021-09-10 | 成都西油华巍科技有限公司 | High water loss plugging agent |
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| CN109971443A (en) * | 2019-03-11 | 2019-07-05 | 中国石油化工股份有限公司 | A kind of three-phase froth envelope alters agent and preparation method thereof, thickened oil recovery tune blocking method |
| CN109971443B (en) * | 2019-03-11 | 2021-08-13 | 中国石油化工股份有限公司 | Three-phase foam channeling sealing agent, preparation method thereof and thickened oil exploitation plugging adjusting method |
| CN110118073A (en) * | 2019-06-12 | 2019-08-13 | 西南石油大学 | A kind of multistage plug classification blocking method suitable for fractured reservoir |
| CN110118073B (en) * | 2019-06-12 | 2020-05-05 | 西南石油大学 | Multi-section plug grading plugging method suitable for fractured stratum |
| CN113565486A (en) * | 2020-04-29 | 2021-10-29 | 中国海洋石油集团有限公司 | Temporary coating particles for acid fracturing fracture wall surface and temporary coating acid fracturing method thereof |
| CN112852392A (en) * | 2021-01-26 | 2021-05-28 | 嘉华特种水泥股份有限公司 | Preparation method of composite rigid plugging agent |
| CN113372889A (en) * | 2021-06-23 | 2021-09-10 | 成都西油华巍科技有限公司 | High water loss plugging agent |
| CN113372889B (en) * | 2021-06-23 | 2022-11-08 | 成都西油华巍科技有限公司 | High water loss plugging agent |
| CN114774094A (en) * | 2022-04-22 | 2022-07-22 | 中国海洋石油集团有限公司 | Permanent type blast hole plugging material used after screen pipe perforation and preparation method |
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