CN110257031A - A kind of oil field microparticle hydrogel profile-controlling and plugging agent and preparation method thereof - Google Patents
A kind of oil field microparticle hydrogel profile-controlling and plugging agent and preparation method thereof Download PDFInfo
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- CN110257031A CN110257031A CN201910513803.XA CN201910513803A CN110257031A CN 110257031 A CN110257031 A CN 110257031A CN 201910513803 A CN201910513803 A CN 201910513803A CN 110257031 A CN110257031 A CN 110257031A
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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
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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- 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
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- C09K2208/34—Lubricant additives
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Abstract
The present invention provides a kind of oil field microparticle hydrogel profile-controlling and plugging agent and preparation method thereof, the microparticle hydrogel profile-controlling and plugging agent includes the component of following percentage: poly-vinyl alcohol solution 1~5%, organic crosslinking agent 0.1~1.0%, hydrophilic silica 0.01~0.05%, lubricant 3~10%, surplus are water；Preparation method are as follows: first polyvinyl alcohol heating for dissolving is prepared into 1~5wt% solution, then the hydrophilic silica and organic crosslinking agent of formula ratio is added, unlatching stirring is warming up to 60~80 DEG C of reactions and obtains macromolecule hydrogel for a period of time, it is then transferred into high speed shear slot and obtains microparticle hydrogel profile-controlling and plugging agent by certain high speed shear technique, the partial size of gained microparticle hydrogel profile-controlling and plugging agent is 100 μm~500 μm, with good viscoplasticity, easy deformation, it can be used for the profile control and water plugging operation of hyposmosis ultra-low penetration oil field, it is effectively improved water injection profile, improve oil recovery factor.
Description
Technical field
The invention belongs to the profile control and water plugging technology fields of oil field oil reservoir, and in particular to a kind of oil field microparticle hydrogel profile control
Water shutoff agent and preparation method thereof.
Background technique
Most oil reservoir use waterflooding extraction mode both at home and abroad at present.As water drive history is goed deep into, well water is note
Water develops oil fields common problem in development process.Since oil reservoir is original or heterogeneity raw afterwards, fluid stream
Difference and other reasons (such as operation failure, production measure mistake) are spent, it is easy to form in the earth formation after long-term injecting water exploitation
Water flow predominant pathway leads to phenomena such as water cone, water breakthrough, water fingering occur, causes oil well premature water breakthrough or water logging, reduces water filling wave
And coefficient, inefficient water drive or water filling inefficient cycle are formed, Development Response of Oilfield reduction is directly resulted in.
In the environment of low oil price, profile control and water plugging is more next as the steady oil control sailor section in cost-efficiently oil field and method
More it is taken seriously.At present both at home and abroad mainly by the way that polymer and crosslinking agent are injected stratum, closing well, which is waited, to coagulate, and forms frozen glue tamper
Achieve the purpose that improve reservoir heterogeneity.Profile control and water plugging polymer is mainly based on polyacrylamide and its derivative at present,
But many disadvantages are had also discovered in actual application, intensity declines rapidly after volume expansion grain water-swellable；The ground of frozen glue
Lower formation leads to the gelation time, gel strength, entrance of frozen glue vulnerable to a variety of function influences such as shearing, chemistry, absorption, dilution
Depth of stratum it is difficult to predict and influence the validity of profile control and water plugging；Polymer microballoon is a kind of size tunable, intensity is adjustable receives
Micron order profile control product, but needed in its production process using a large amount of mineral oil and emulsifier, higher cost and is easy to appear
The phenomenon that Produced Liquid emulsifies.
Summary of the invention
The purpose of the present invention is to provide a kind of oil field microparticle hydrogel profile-controlling and plugging agents and preparation method thereof, to overcome
Above-mentioned technological deficiency.
In order to solve the above technical problems, the present invention the following technical schemes are provided:
A kind of oil field microparticle hydrogel profile-controlling and plugging agent, which is characterized in that the group including following percentage
Point: poly-vinyl alcohol solution 1~5%, organic crosslinking agent 0.1~1.0%, hydrophilic silica 0.01~0.05%, lubrication
Agent 3~10%, surplus are water.
The organic crosslinking agent is organic boron titanium composite delay crosslinking agent JL-BTi, and the limited public affairs of safe chemical science and technology are moistened in Shaanxi
Department, crosslinking ratio are m (PVA solution): m (JL-BTi)=100:0.1~1.0.
The partial size of the hydrophilic silica is 20~30nm.
The lubricant is 5# technical white oil.
The preparation method of the oil field microparticle hydrogel profile-controlling and plugging agent, comprising the following steps:
S1 prepares poly-vinyl alcohol solution: weighing polyvinyl alcohol, is added in the distilled water for being 60 DEG C -90 DEG C to temperature, carries out
Stirring and dissolving obtains the poly-vinyl alcohol solution that mass percentage concentration is 1%-5%；
S2 prepares polyvinyl alcohol hydrogel: the hydrophilic silica of formula ratio, stirring being added into the water of formula ratio
To being completely dispersed, the prepared poly-vinyl alcohol solution of step S1 of formula ratio is then added, stirs to being completely dissolved, adds formula
The organic crosslinking agent of amount stirs 1h, stops stirring and is warming up to 60~80 DEG C, 3~5h of reaction obtains polyvinyl alcohol hydrogel；
S3 prepares microparticle hydrogel: polyvinyl alcohol hydrogel prepared by step S2 being put into cut groove, addition is matched
The lubricant just measured shears 10~60min, obtains microparticle hydrogel profile-controlling and plugging agent.
Poly-vinyl alcohol solution is polyvinyl alcohol 2688, polyvinyl alcohol 2699, polyvinyl alcohol 2488, poly- second in the step S1
At least one of enol 2499.
The capacity of cut groove is 0.5~1m in the step S33。
The shear rate of cut groove is 2000~6000r/min in the step S3.
Beneficial effects of the present invention:
1. the principle that the present invention is combined using surface-active polymer with nano material, the microparticle hydrogel tune of preparation
Water shutoff agent is cutd open with good injection efficiency and blocks efficiency；
2. polyvinyl alcohol itself is a kind of high molecular surfactant, the gel by being crosslinked preparation is with surface-active
The homogeneous phase gel of agent is able to maintain consistent surface-active in the migration process of stratum, has the effect of dispersion and emulsion crude oil, thus
Improve recovery ratio；
3. microparticle hydrogel profile-controlling and plugging agent prepared by the present invention is a kind of elastic gel, there is good viscoplasticity,
Deep profile controlling can be achieved；
3. the introducing of nano material improves the intensity and good ageing-resistant performance of gel, higher envelope is kept for a long time
Stifled intensity.
Specific embodiment
Embodiment 1
The present invention provides a kind of oil field microparticle hydrogel profile-controlling and plugging agent, the group including following percentage
Point: poly-vinyl alcohol solution 1~5%, organic crosslinking agent 0.1~1.0%, hydrophilic silica 0.01~0.05%, lubrication
Agent 3~10%, surplus are water.Preparation method are as follows: first polyvinyl alcohol heating for dissolving is prepared into 1~5wt% solution, then
The hydrophilic silica of formula ratio and the organic crosslinking agent of formula ratio is added, opens stirring and is warming up to 60~80 DEG C of reactions one
The section time obtains macromolecule hydrogel, is then transferred into high speed shear slot by certain high speed shear technique and obtains microparticle water
Gel profile-controlling and plugging agent, the partial size of gained microparticle hydrogel profile-controlling and plugging agent are 100 μm~500 μm, have good viscoelastic
Property, easy deformation can be used for the profile control and water plugging operation of hyposmosis ultra-low penetration oil field, be effectively improved water injection profile, raising oil recovering
Rate.
Embodiment 2
On the basis of embodiment 1, the poly-vinyl alcohol solution is polyvinyl alcohol 2688, polyvinyl alcohol 2699, polyethylene
At least one of alcohol 2488, polyvinyl alcohol 2499.Polyvinyl alcohol is that a kind of chemical property is stablized, have it is good it is acidproof, alkaline-resisting,
Dry heat resistance energy, polyvinyl alcohol are dissolved in water, but are practically insoluble in the water soluble polymer of organic solvent, both contain in molecule
There is the hydroxyl of hydrophily high activity, and contain hydrophobic acetyl group, thus there is surfactant.
The organic crosslinking agent is organic boron titanium composite delay crosslinking agent JL-BTi, and it is limited to moisten safe chemical science and technology purchased from Shaanxi
Company, crosslinking ratio are m (PVA solution): m (JL-BTi)=100:(0.1~1.0).
The present invention is on the basis of the profile control and water plugging present condition and developing tendency of system research oil field, using with surface-active
The polyvinyl alcohol of agent is crosslinked as macromolecule main body using organic boron titanium crosslinkers, and enhances to obtain by nano material
High intensity hydrogel, then high speed shear is prepared with good injection efficiency and the microparticle water-setting for effectively improving recovery ratio
Glue profile-controlling and plugging agent.
Embodiment 3
Nano material generally refers to new material of the size at least one dimension between l-100nm, and this scale is to be in
Jie between macroscopic material and microcosmic cluster sees state.Material in this scale has some peculiar properties.Oil gas field
The work scholars of exploitation work attempt to add nano material formation nano-fluid in oil displacement agent, change certain physics of oil displacement agent
Chemical property, to improve the recovery ratio of crude oil.Due to mature production technology and higher cost performance, nano silica at
For most important application material.Hydrophilic silica of the present invention selects model HL200, and particle size range is 20~
30nm is purchased from Shanghai Jing Ma Chemical Industry Science Co., Ltd.
The present invention improves the intensity of gel and good resistance to old by introducing nano material (hydrophilic silica)
Change performance, keeps higher plugging strength for a long time.
Embodiment 4
The preparation method of the oil field microparticle hydrogel profile-controlling and plugging agent, comprising:
(1) PVA solution is prepared
1800kg water is added in 3 tons of heating reaction kettles, opens stirring 200kg polyvinyl alcohol 2488, is warming up to 80 DEG C, after
Continuous stirring 1h obtains 10% 2488 solution of polyvinyl alcohol (being denoted as 10%PVA2488) to being completely dissolved.
(2) prepared by PVA hydrogel
It sequentially adds 2000kg water in 5 tons of reaction kettles, 0.5kg hydrophilic silica is added and stirs 30min to complete
Then the 10%PVA2488 of 1200kg is added in full dispersion, 40kg crosslinking agent JL-BTi is added to being completely dissolved in stirring 20min,
760kg water 10~40min of stirring is added to become larger to viscosity, stopping stirring being warming up to 60 DEG C of reaction 4h and obtains PVA hydrogel.
(3) prepared by microparticle hydrogel profile-controlling and plugging agent
Increase pressure 0.1MPa in reaction kettle by air compressor, it is 1.5m that 950kgPVA hydrogel, which is put to volume,3
Cut groove in, be added 50kg5# white oil, 3000r/min shear 15min, obtain microparticle hydrogel profile-controlling and plugging agent.
Embodiment 5
The preparation method of the oil field microparticle hydrogel profile-controlling and plugging agent, comprising:
(1) PVA solution is prepared
1800kg water is added in 3 tons of heating reaction kettles, opens stirring 200kg polyvinyl alcohol 2688, is warming up to 80 DEG C, after
Continuous stirring 1h obtains 10% 2488 solution of polyvinyl alcohol (being denoted as 10%PVA2688) to being completely dissolved.
(2) prepared by PVA hydrogel
It sequentially adds 2000kg water in 5 tons of reaction kettles, 0.5kg hydrophilic silica is added and stirs 30min to complete
Then the 10%PVA2488 of 1000kg is added in full dispersion, 50kg crosslinking agent JL-BTi is added to being completely dissolved in stirring 20min,
950kg water 10~40min of stirring is added to become larger to viscosity, stopping stirring being warming up to 60 DEG C of reaction 4h and obtains PVA hydrogel.
(3) prepared by microparticle hydrogel profile-controlling and plugging agent
Increase pressure 0.1MPa in reaction kettle by air compressor, it is 1.5m that 950kgPVA hydrogel, which is put to volume,3
Cut groove in, be added 50kg5# white oil, 4000r/min shear 30min, obtain microparticle hydrogel profile-controlling and plugging agent.
Embodiment 6
The preparation method of the oil field microparticle hydrogel profile-controlling and plugging agent, comprising:
(1) PVA solution is prepared
1800kg water is added in 3 tons of heating reaction kettles, opens stirring 100kg polyvinyl alcohol 2688,100kg polyvinyl alcohol
2499,80 DEG C are warming up to, continues to stir 1h to being completely dissolved, obtains 10% poly-vinyl alcohol solution (being denoted as 10%PVA-H).
(2) prepared by PVA hydrogel
It sequentially adds 2000kg water in 5 tons of reaction kettles, 1.0kg hydrophilic silica is added and stirs 30min to complete
Full dispersion, is then added the 10%PVA-H of 1500kg, and stirring 30min is added 100kg crosslinking agent JL-BTi, adds to being completely dissolved
Enter 400kg water 10~40min of stirring to become larger to viscosity, stopping stirring being warming up to 60 DEG C of reaction 4h and obtains PVA hydrogel.
(3) prepared by microparticle hydrogel profile-controlling and plugging agent
Increase pressure 0.1MPa in reaction kettle by air compressor, it is 1.5m that 950kgPVA hydrogel, which is put to volume,3
Cut groove in, be added 50kg5# white oil, 6000r/min shear 40min, obtain microparticle hydrogel profile-controlling and plugging agent.
Embodiment 7
Partial size is tested to microparticle hydrogel profile-controlling and plugging agent of the invention laser particle analyzer, as a result see the table below 1:
Table 1 is BT-9300Z type laser fineness gage test report
| Embodiment 4 | Embodiment 5 | Embodiment 6 | |
| D50 partial size (μm) | 354 | 226 | 160 |
The test of microparticle hydrogel profile-controlling and plugging agent prepared by embodiment 4-6 initial data is as shown in table 1, micro- in table
The median of grain hydrogel profile-controlling and plugging agent is 160 μm.
Embodiment 8
Seal-off effect test carried out to microparticle hydrogel profile-controlling and plugging agent of the invention, hydrogel sealing ratiod 94% with
On, it as a result see the table below 2:
Table 2 is that the seal-off effect of microparticle hydrogel profile-controlling and plugging agent is tested
Can be obtained by above-mentioned experimental data: prepared microparticle hydrogel profile-controlling and plugging agent partial size is 100 μm~500 μ
M has good viscoplasticity, and easy deformation can be used for the profile control and water plugging operation of hyposmosis ultra-low penetration oil field, and effectively drop improves water filling
Section improves oil recovery factor.
Claims (9)
1. a kind of oil field microparticle hydrogel profile-controlling and plugging agent, which is characterized in that the component including following percentage:
Poly-vinyl alcohol solution 1~5%, organic crosslinking agent 0.1~1.0%, hydrophilic silica 0.01~0.05%, lubricant 3
~10%, surplus is water.
2. a kind of oil field microparticle hydrogel profile-controlling and plugging agent according to claim 1, it is characterised in that: organic friendship
Connection agent is organic boron titanium composite delay crosslinking agent JL-BTi.
3. a kind of oil field microparticle hydrogel profile-controlling and plugging agent according to claim 2, it is characterised in that: the polyethylene
The crosslinking mass ratio of alcoholic solution and organic crosslinking agent is 100:(0.1~1.0).
4. a kind of oil field microparticle hydrogel profile-controlling and plugging agent according to claim 1, it is characterised in that: described hydrophilic to receive
The partial size of rice silica is 20~30nm.
5. a kind of oil field microparticle hydrogel profile-controlling and plugging agent according to claim 1, it is characterised in that: the lubricant
For 5# technical white oil.
6. a kind of preparation method of oil field microparticle hydrogel profile-controlling and plugging agent according to claim 1-5,
It is characterized in that, comprising the following steps:
S1 prepares poly-vinyl alcohol solution: weighing polyvinyl alcohol, is added in the distilled water for being 60 DEG C -90 DEG C to temperature, is stirred
Dissolution obtains the poly-vinyl alcohol solution that mass percentage concentration is 1%-5%；
S2 prepares polyvinyl alcohol hydrogel: the hydrophilic silica of formula ratio being added into the water of formula ratio, stirs to complete
Full dispersion, is then added the prepared poly-vinyl alcohol solution of step S1 of formula ratio, stirs to being completely dissolved, adds formula ratio
Organic crosslinking agent stirs 1h, stops stirring and is warming up to 60~80 DEG C, 3~5h of reaction obtains polyvinyl alcohol hydrogel；
S3 prepares microparticle hydrogel: polyvinyl alcohol hydrogel prepared by step S2 being put into cut groove, formula ratio is added
Lubricant, shear 10~60min, obtain microparticle hydrogel profile-controlling and plugging agent.
7. a kind of preparation method of oil field microparticle hydrogel profile-controlling and plugging agent according to claim 6, it is characterised in that:
Poly-vinyl alcohol solution is polyvinyl alcohol 2688, polyvinyl alcohol 2699, polyvinyl alcohol 2488, polyvinyl alcohol 2499 in the step S1
At least one of.
8. a kind of preparation method of oil field microparticle hydrogel profile-controlling and plugging agent according to claim 6, it is characterised in that:
The capacity of cut groove is 0.5~1m3 in the step S3.
9. a kind of preparation method of oil field microparticle hydrogel profile-controlling and plugging agent according to claim 6, it is characterised in that:
The shear rate of cut groove is 2000~6000r/min in the step S3.
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Cited By (5)
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|---|---|---|---|---|
| CN111087999A (en) * | 2020-01-10 | 2020-05-01 | 任丘市油联化工有限公司 | High-temperature-resistant profile control agent for oil extraction and preparation method thereof |
| CN112175594A (en) * | 2020-09-22 | 2021-01-05 | 西南石油大学 | Thermoplastic elastomer for profile control and water shutoff and preparation method thereof |
| CN114058029A (en) * | 2020-07-29 | 2022-02-18 | 中国石油化工股份有限公司 | Shear response type hydrogel and preparation method and application thereof |
| CN114106808A (en) * | 2021-11-29 | 2022-03-01 | 宁波锋成先进能源材料研究院有限公司 | Hydrogel particles and preparation method and application thereof |
| CN115044356A (en) * | 2022-08-12 | 2022-09-13 | 中海油田服务股份有限公司 | Profile control and flooding agent suitable for high-temperature and high-salinity oil reservoir and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111087999A (en) * | 2020-01-10 | 2020-05-01 | 任丘市油联化工有限公司 | High-temperature-resistant profile control agent for oil extraction and preparation method thereof |
| CN114058029A (en) * | 2020-07-29 | 2022-02-18 | 中国石油化工股份有限公司 | Shear response type hydrogel and preparation method and application thereof |
| CN114058029B (en) * | 2020-07-29 | 2023-11-28 | 中国石油化工股份有限公司 | Shear response type hydrogel and preparation method and application thereof |
| CN112175594A (en) * | 2020-09-22 | 2021-01-05 | 西南石油大学 | Thermoplastic elastomer for profile control and water shutoff and preparation method thereof |
| CN114106808A (en) * | 2021-11-29 | 2022-03-01 | 宁波锋成先进能源材料研究院有限公司 | Hydrogel particles and preparation method and application thereof |
| CN115044356A (en) * | 2022-08-12 | 2022-09-13 | 中海油田服务股份有限公司 | Profile control and flooding agent suitable for high-temperature and high-salinity oil reservoir and preparation method thereof |
| CN115044356B (en) * | 2022-08-12 | 2022-10-25 | 中海油田服务股份有限公司 | Profile control and flooding agent suitable for high-temperature and high-salinity oil reservoir and preparation method thereof |
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Application publication date: 20190920 |