CN110330958A - A kind of method of profile control and acidification connection work improvement intake profile - Google Patents
A kind of method of profile control and acidification connection work improvement intake profile Download PDFInfo
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- CN110330958A CN110330958A CN201910513610.4A CN201910513610A CN110330958A CN 110330958 A CN110330958 A CN 110330958A CN 201910513610 A CN201910513610 A CN 201910513610A CN 110330958 A CN110330958 A CN 110330958A
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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
- 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
- C09K8/516—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls characterised by their form or by the form of their components, e.g. encapsulated material
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
Abstract
The present invention provides a kind of methods that profile control and acidification connection make improvement intake profile, block advantage macropore for profile control to oil reservoir perforated interval injection flexible gel particle slug first, then be used to be acidified hyposmosis interval to oil reservoir perforated interval injection retarded acid.Utilize flexible gel particle profile control reservoir plugging advantage water flow macropore, realization is subsequently implanted into medium fluid diversion, injection retarded acid acidification water drive does not involve or involves weaker less permeable layer on this basis, the respective advantage for giving full play to flexible gel particle macropore plugging, retarded acid acidification less permeable layer, realizes that connection makees improvement intake profile.Advantage of the invention is that acid solution is avoided reacting with water layer or advantage water stream channel, sufficiently reacted in low-permeability layer, had not only reduced sour invalid effect, but also can effectively improve intake profile.
Description
Technical field
The present invention relates to technical field of petroleum extraction, and in particular to a kind of side of profile control and acidification connection work improvement intake profile
Method.
Background technique
Low-permeability oil deposit reserves scale is big, abundance is low, reservoir is fine and close but microcrack is developed, and water filling is still current hyposmosis
The main means of oil field effective exploitation.During waterflooding extraction, because of the presence of reservoir heterogeneity or microcrack, through long period of development
Formation advantage water stream channel causes injection water to be easy to quickly propel, and forms the office of " high permeability formation water breakthrough, low-permeability layer water drive do not involve "
The even water logging of well water rapid increase, yield rapid decrease is caused in face.In view of the above-mentioned problems, widespread practice is out at present
It opens up water injection well chemical profile control and blocks high permeability formation, realize the purpose for improving intake profile.Profile control carries out after effectively blocking hypertonic band,
It is crucial for ensuring to be subsequently implanted into the enough low-permeability layers of effectively employing of water energy.But since low-permeability oil deposit matrix is fine and close, profile control blocks big
After the hypertonic band such as duct, microcrack, water injection well often again can not the hypotonic matrix oil reservoir of effective displacement.It is hypertonic accordingly, there exist taking into account
Block the contradiction between hypotonic displacement.
In fact, acidification is also to solve one of uneven effective technological means of water drive.Acidification is not moved by the way that acidification is hypotonic
With layer, reach the injectability for improving Middle-Low Permeability Reservoirs.And for acidification, allow acid solution to avoid and water layer or advantage water stream channel
Reaction is the key that sufficiently then to solve low-permeability layer water drive to employ in low-permeability layer reaction.
Summary of the invention
The purpose of the present invention is overcoming existing single profile control and single acidification to improve the insufficiency of intake profile, one is provided
The method that kind profile control makees improvement intake profile with acidification connection can take into account macropore closure and dredge with matrix acidifying, to realize
Improve intake profile.
Technical scheme is as follows:
A kind of method of profile control and acidification connection work improvement intake profile, injects flexible gel particle section to oil reservoir perforated interval first
Plug blocks High Permeability Interval for profile control；Tempered spline is injected to oil reservoir perforated interval again, for being acidified hyposmosis interval；Institute
The injection rate volume ratio for stating flexible gel particle slug and tempered spline is (400 ~ 600): (15 ~ 20).
The flexible gel particle slug is injected using profile control pump, and injection discharge capacity is 2-4m3/h.
The tempered spline is injected using plunger pump, and injection discharge capacity is 3-5m3/h.
The flexible gel particle slug is counted in mass ratio, including following components: 0.3%-0.5% flexible gel particle,
0.05%-0.1% polyacrylamide solution, surplus are water.
The preparation method of the flexible gel particle slug is first to be dissolved in water the polyacrylamide solution of formula ratio,
Then the flexible gel particle of formula ratio is added, flexible gel particle slug base fluid is made after being uniformly mixed, it will be flexible
Gel slug base fluid injection perforated interval predetermined position forms flexible gel particle slug.
The flexible gel particle by mass percentage, including following components: 3%-6% acrylamide, 0.03%-0.06%
N, N- methylene-bisacrylamide, 0.01%-0.03% ammonium persulfate, 0.02%-0.04% sodium sulfite, 2%-4% clay, surplus are
Water.
The flexible gel particle the preparation method comprises the following steps: press formula rate, acrylamide is dissolved in water, then successively
N is added, N- methylene-bisacrylamide, ammonium persulfate stir evenly, and sodium sulfite then are added, clay stirs evenly, mixing
Flexible gel particle slug is made after uniformly.
The molecular weight of the polyacrylamide is 1300 ~ 18,000,000, degree of hydrolysis 20%-28%.
The tempered spline, by mass percentage, including following components: 15%-17% hydrochloric acid, 9%-12% hydrofluoric acid,
32%-35% dihydric phosphate, 1%-3% acetic acid, 3%-5% ammonium fluoride, 2%-4% ferrous stability, 1.2%-2.4% corrosion inhibiter,
0.3%-0.5% cleanup additive, surplus are water.
The ferrous stability is that citric acid is mixed with acetic acid 6:4 in mass ratio, and corrosion inhibiter is Benzylmagnesium chloride quinoline
Quinoline, cleanup additive are alkyl sulfonic ester salt.
Beneficial effects of the present invention:
This profile control provided by the invention and acidification connection are made to improve the technical method of intake profile, utilize flexible gel particle profile control
Reservoir plugging advantage water flow macropore, realization are subsequently implanted into medium fluid diversion, inject retarded acid on this basis and are acidified water drive
Do not involve or involve weaker less permeable layer, gives full play to flexible gel particle macropore plugging, retarded acid acidification less permeable layer
Respective advantage, realize connection makees improvement intake profile.
Specific embodiment
Embodiment 1
The present invention provides a kind of methods that profile control and acidification connection make improvement intake profile, inject first to oil reservoir perforated interval flexible
Gel particle slug blocks High Permeability Interval for profile control；Tempered spline is injected to oil reservoir perforated interval again, it is hypotonic for being acidified
Permeable layers section；The injection rate volume ratio of the flexible gel particle slug and tempered spline is (400 ~ 600): (15 ~ 20).
This method utilizes flexible gel particle profile control reservoir plugging advantage water flow macropore, and realization is subsequently implanted into medium liquid stream
It turns to, injects retarded acid acidification water drive on this basis and do not involve or involve weaker less permeable layer, give full play to flexible gel
The respective advantage of particle macropore plugging, retarded acid acidification less permeable layer, realizes that connection makees improvement intake profile.
Embodiment 2
On the basis of the above embodiments, further, the flexible gel particle slug is counted in mass ratio, including with the following group
Point: 0.3%-0.5% flexible gel particle, 0.05%-0.1% polyacrylamide solution, surplus are water.The flexible gel particle
The preparation method of slug is first to be dissolved in water the polyacrylamide solution of formula ratio, and the flexible gel of formula ratio is then added
Flexible gel particle slug base fluid is made in particle after being uniformly mixed, flexible gel slug base fluid injection perforated interval is pre-
Positioning, which is set, forms flexible gel particle slug.
Further, wherein the molecular weight of the polyacrylamide is 1300 ~ 18,000,000, degree of hydrolysis 20%-28%.
The flexible gel particle by mass percentage, including following components: 3%-6% acrylamide, 0.03%-0.06%
N, N- methylene-bisacrylamide, 0.01%-0.03% ammonium persulfate, 0.02%-0.04% sodium sulfite, 2%-4% clay, surplus are
Water.
The flexible gel particle the preparation method comprises the following steps: press formula rate, acrylamide is dissolved in water, then successively
N is added, N- methylene-bisacrylamide, ammonium persulfate stir evenly, and sodium sulfite then are added, clay stirs evenly, mixing
Flexible gel particle slug is made after uniformly.
Embodiment 3
On the basis of the above embodiments, further, the tempered spline, by mass percentage, including following components:
15%-17% hydrochloric acid, 9%-12% hydrofluoric acid, 32%-35% dihydric phosphate, 1%-3% acetic acid, 3%-5% ammonium fluoride, 2%-4% iron ion
Stabilizer, 1.2%-2.4% corrosion inhibiter, 0.3%-0.5% cleanup additive, surplus are water.
The ferrous stability is that citric acid is mixed with acetic acid 6:4 in mass ratio, and corrosion inhibiter is Benzylmagnesium chloride quinoline
Quinoline, cleanup additive are alkyl sulfonic ester salt.
The tempered spline is 15%-20% in the rock corrosion rate of acid-rock reaction time 4h, the average corruption to N80 steel disc
Lose rate 0.81-0.95 g/ ㎡ h.
Embodiment 4
The present invention provides the method for a kind of profile control and acidification connection work improvement intake profile, injects flexible gel particle to oil reservoir first
Slug blocks advantage macropore for profile control, then to oil reservoir injection retarded acid for being acidified hyposmosis interval.
The flexible gel particle slug includes following components: being counted in mass ratio, 0.4% flexible gel particle, 0.1% poly- third
Acrylamide solution, remaining as water.Wherein Molecular Weight for Polyacrylamide 16,200,000, degree of hydrolysis 25%.The flexible gel particle slug
Preparation method be the polyacrylamide solution of formula ratio is dissolved in water, then be added formula ratio flexible gel particle,
Flexible gel particle slug base fluid is made after being uniformly mixed, is by flexible gel slug base fluid injection pit shaft predetermined position
Form flexible gel particle slug.
The flexible gel particle includes following components: by mass percentage, 5% acrylamide be host agent, 0.04% N,
N- methylene-bisacrylamide is crosslinking agent, and 0.02% ammonium persulfate is initiator, and 0.04% sodium sulfite is stabilizer, 3% clay
For additive, remaining is water.The flexible gel particle the preparation method is as follows: press formula rate, acrylamide is dissolved in
In water, N is then sequentially added, N- methylene-bisacrylamide, ammonium persulfate stir evenly, and sodium sulfite, clay is then added
It stirs evenly, flexible gel particle is made after mixing.The apparent partial size of gained flexible gel particle is 3-6mm, water suction
Swelling volume multiple is 3 times.
Tempered spline, that is, the tempered spline, by mass percentage, including 16% hydrochloric acid, 10% hydrofluoric acid, 34% phosphorus
Hydrochlorate, 2% acetic acid, 4% ammonium fluoride, 3% ferrous stability, 2% corrosion inhibiter, 0.3% cleanup additive, remaining is water；The iron ion is steady
Determining agent is that citric acid is mixed with acetic acid 6:4 in mass ratio, and corrosion inhibiter is Benzylmagnesium chloride quinoline, and cleanup additive is alkyl sulfonic ester
Salt.The retarded acid is 19% in the rock corrosion rate of acid-rock reaction time 4h, to 0.91 g/ of average corrosion rate of N80 steel disc
㎡•h。
The injection mode of the flexible gel particle slug is to be injected using profile control pump, injects discharge capacity 2-4m3/h.It is described slow
The injection mode of fast acid is to be injected using plunger pump, injects discharge capacity 3-5m3/h, and it is not one that injection discharge capacity, which has a range,
It is straight constant, as long as finally acid solution has been infused.
The injection rate of the flexible gel particle slug and Compound-acid slug is 500m3:18 m3 by volume.
It after transfer drive measure, infuses measure water injection well day and increases 8 m3/d, corresponding oil well increases oily amplitude 9.5%, precipitation range 11.6%.
Embodiment 5
The present invention provides the method for a kind of profile control and acidification connection work improvement intake profile, injects flexible gel particle to oil reservoir first
Slug blocks advantage macropore for profile control, then to oil reservoir injection retarded acid for being acidified hyposmosis interval.
The flexible gel particle slug includes following components: being counted in mass ratio, 0.3% flexible gel particle, 0.05% is poly-
Acrylamide solution, remaining as water.Molecular Weight for Polyacrylamide 17,500,000, degree of hydrolysis 22%.The preparation of flexible gel particle slug
Method is to be dissolved in water the polyacrylamide solution of formula ratio, and the flexible gel particle of formula ratio is then added, and stirring is mixed
Flexible gel particle slug base fluid is made after closing uniformly, flexible gel slug base fluid injection pit shaft predetermined position is formed soft
Property gel particle slug.
Preparing for the flexible gel particle is as follows: by mass percentage, 6% acrylamide is host agent, 0.06% N, N-
Methylene-bisacrylamide is crosslinking agent, and 0.03% ammonium persulfate is initiator, and 0.04% sodium sulfite is stabilizer, and 4% clay is
Additive, remaining is water.The flexible gel particle the preparation method is as follows: press formula rate, acrylamide is dissolved in water
In, N is then sequentially added, N- methylene-bisacrylamide, ammonium persulfate stir evenly, and sodium sulfite then are added, clay stirs
It mixes uniformly, flexible gel particle is made after mixing.The apparent partial size of the flexible gel particle is 4-8mm, is absorbed water swollen
Swollen volume multiple is 4 times.
The tempered spline, by mass percentage, by 16% hydrochloric acid, 12% hydrofluoric acid, 32% phosphate, 2% acetic acid,
5% ammonium fluoride, 4% ferrous stability, 2.4% corrosion inhibiter, 0.5% cleanup additive, remaining is water.The ferrous stability is
Citric acid is mixed with acetic acid 6:4 in mass ratio, and corrosion inhibiter is Benzylmagnesium chloride quinoline, and cleanup additive is alkyl sulfonic ester salt.Institute
It is 17% that retarded acid, which is stated, in the rock corrosion rate of acid-rock reaction time 4h, to the average corrosion rate 0.94g/ ㎡ h of N80 steel disc.
The injection mode of the retarded acid is to be injected using plunger pump, injects discharge capacity 3m3/h.
The injection mode of the flexible gel particle slug is to be injected using profile control pump, injects discharge capacity 2m3/h.
The injection rate of the flexible gel particle slug and Compound-acid slug is 400m3:15 m3 by volume.
It after transfer drive measure, infuses measure water injection well day and increases 7m3/d, corresponding oil well increases oily amplitude 8.2%, precipitation range 9.7%.
Embodiment 6
The present invention provides the method for a kind of profile control and acidification connection work improvement intake profile, injects flexible gel particle to oil reservoir first
Slug blocks advantage macropore for profile control, then to oil reservoir injection retarded acid for being acidified hyposmosis interval.
The flexible gel particle slug includes following components: being counted in mass ratio, 0.5% flexible gel particle, 0.1% poly- third
Acrylamide solution, remaining as water.Molecular Weight for Polyacrylamide 15,000,000, degree of hydrolysis 20%.The system of the flexible gel particle slug
Preparation Method is to be dissolved in water the polyacrylamide solution of formula ratio, and the flexible gel particle of formula ratio, stirring is then added
Flexible gel particle slug base fluid is made after mixing, flexible gel slug base fluid injection pit shaft predetermined position is formed
Flexible gel particle slug.
Preparing for the flexible gel particle is as follows: by mass percentage, 4% acrylamide be host agent, 0.03%% N,
N- methylene-bisacrylamide is crosslinking agent, and 0.01% ammonium persulfate is initiator, and 0.02% sodium sulfite is stabilizer, 2% clay
For additive, remaining is water.The flexible gel particle the preparation method is as follows: press formula rate, acrylamide is dissolved in
In water, N is then sequentially added, N- methylene-bisacrylamide, ammonium persulfate stir evenly, and sodium sulfite, clay is then added
It stirs evenly, flexible gel particle is made after mixing.The apparent partial size of the flexible gel particle is 3-5mm.Water suction
Swelling volume multiple is 2 times.
The tempered spline, by mass percentage, by 15%% hydrochloric acid, 11% hydrofluoric acid, 34% phosphate, 3% acetic acid,
3%% ammonium fluoride, 2%% ferrous stability, 1.9% corrosion inhibiter, 0.5% cleanup additive, remaining is water.The ferrous stability is
Citric acid is mixed with acetic acid 6:4 in mass ratio, and corrosion inhibiter is Benzylmagnesium chloride quinoline, and cleanup additive is alkyl sulfonic ester salt.Institute
It is 16% that retarded acid, which is stated, in the rock corrosion rate of acid-rock reaction time 4h, to the 0.88 g/ ㎡ h of average corrosion rate of N80 steel disc.
The injection mode of the flexible gel particle slug is to be injected using profile control pump, injects discharge capacity 4m3/h.
The injection mode of the retarded acid is to be injected using plunger pump, injects discharge capacity 5m3/h.
The injection rate of the flexible gel particle slug and Compound-acid slug is 600m3:20 m3 by volume.
It after transfer drive measure, infuses measure water injection well day and increases 10 m3/d, corresponding oil well increases oily amplitude 10.8%, precipitation range
12.1%。
Embodiment 7
The present invention provides the method for a kind of profile control and acidification connection work improvement intake profile, injects flexible gel particle to oil reservoir first
Slug blocks advantage macropore for profile control, then to oil reservoir injection retarded acid for being acidified hyposmosis interval.
The flexible gel particle slug includes following components: being counted in mass ratio, 0.4% flexible gel particle, 0.07% is poly-
Acrylamide solution, remaining as water.Molecular Weight for Polyacrylamide 16,000,000, degree of hydrolysis 23%.The flexible gel particle slug
Preparation method is to be dissolved in water the polyacrylamide solution of formula ratio, and the flexible gel particle of formula ratio is then added, stirs
It mixes and flexible gel particle slug base fluid is made after mixing, flexible gel slug base fluid is injected into pit shaft predetermined position, that is, shape
At flexible gel particle slug.
Preparing for the flexible gel particle is as follows: by mass percentage, 5% acrylamide is host agent, 0.05% N, N-
Methylene-bisacrylamide is crosslinking agent, and 0.02% ammonium persulfate is initiator, and 0.03% sodium sulfite is stabilizer, and 3% clay is
Additive, remaining is water.The flexible gel particle the preparation method is as follows: press formula rate, acrylamide is dissolved in water
In, N is then sequentially added, N- methylene-bisacrylamide, ammonium persulfate stir evenly, and sodium sulfite then are added, clay stirs
It mixes uniformly, flexible gel particle is made after mixing.The apparent partial size of the flexible gel particle is 3-6mm.It absorbs water swollen
Swollen volume multiple is 3.5 times.
The tempered spline, by mass percentage, by 16% hydrochloric acid, 12% hydrofluoric acid, 35% phosphate, 3% acetic acid,
4% ammonium fluoride, 3% ferrous stability, 2.4% corrosion inhibiter, 0.5% cleanup additive, remaining is water.The ferrous stability is lemon
Lemon acid is mixed with acetic acid 6:4 in mass ratio, and corrosion inhibiter is Benzylmagnesium chloride quinoline, and cleanup additive is alkyl sulfonic ester salt.It is described
Retarded acid is 18% in the rock corrosion rate of acid-rock reaction time 4h, to the 0.86 g/ ㎡ h of average corrosion rate of N80 steel disc.
The injection mode of the flexible gel particle slug is to be injected using profile control pump, injects discharge capacity 3m3/h.It is described slow
The injection mode of acid is to be injected using plunger pump, injects discharge capacity 4m3/h.
The injection rate of the flexible gel particle slug and Compound-acid slug is 500m3:18 m3 by volume.
Using flexible gel particle reservoir plugging crack and macropore, expand swept volume, is transformed using tempered spline hypotonic
The waterflooding effect of section oil reservoir.After transfer drive measure, to infuse measure water injection well day and increase 6 m3/d, corresponding oil well increases oily amplitude 7.1%,
Precipitation range 9.6%.
In conclusion a kind of profile control provided by the invention and acidification connection are made to improve the method for intake profile, give full play to soft
Property gel particle macropore plugging, retarded acid acidification less permeable layer respective advantage, realize that connection makees improvement intake profile.The present invention
Advantage be to avoid acid solution to react with water layer or advantage water stream channel, sufficiently reacted in low-permeability layer, reduce that acid solution is unhelpful disappears
Consumption, can be effectively improved intake profile.The foregoing examples are only illustrative of the present invention, does not constitute to guarantor of the invention
Protect range limitation, it is all with the present invention it is the same or similar design all belong to the scope of protection of the present invention within.
Claims (10)
1. a kind of profile control and acidification connection are made to improve the method for intake profile, it is characterised in that: injected first to oil reservoir perforated interval soft
Property gel particle slug, for profile control block High Permeability Interval；Tempered spline is injected to oil reservoir perforated interval again, it is low for being acidified
Permeable interval；The injection rate volume ratio of the flexible gel particle slug and tempered spline is (400 ~ 600): (15 ~ 20).
2. a kind of profile control according to claim 1 and acidification connection are made to improve the method for intake profile, it is characterised in that: described
Flexible gel particle slug is injected using profile control pump, and injection discharge capacity is 2-4m3/h.
3. a kind of profile control according to claim 1 and acidification connection are made to improve the method for intake profile, it is characterised in that: described
Tempered spline is injected using plunger pump, and injection discharge capacity is 3-5m3/h.
4. a kind of profile control according to claim 1 and acidification connection are made to improve the method for intake profile, which is characterized in that described
Flexible gel particle slug is counted in mass ratio, including following components: 0.3%-0.5% flexible gel particle, 0.05%-0.1% poly- third
Acrylamide solution, surplus are water.
5. a kind of profile control according to claim 4 and acidification connection are made to improve the method for intake profile, it is characterised in that: described
The preparation method of flexible gel particle slug is first to be dissolved in water the polyacrylamide solution of formula ratio, and formula is then added
Flexible gel particle slug base fluid is made in the flexible gel particle of amount after being uniformly mixed, by flexible gel slug base fluid
Injection perforated interval predetermined position forms flexible gel particle slug.
6. a kind of profile control according to claim 4 and acidification connection are made to improve the method for intake profile, which is characterized in that described
Flexible gel particle by mass percentage, including following components: 3%-6% acrylamide, 0.03%-0.06% N, N- methylene
Bisacrylamide, 0.01%-0.03% ammonium persulfate, 0.02%-0.04% sodium sulfite, 2%-4% clay, surplus are water.
7. a kind of profile control according to claim 6 and acidification connection are made to improve the method for intake profile, which is characterized in that described
Flexible gel particle the preparation method comprises the following steps: press formula rate, acrylamide is dissolved in water, N, N- methylene are then sequentially added
Base bisacrylamide, ammonium persulfate stir evenly, and then addition sodium sulfite, clay stir evenly, and are made after mixing
Flexible gel particle slug.
8. a kind of profile control according to claim 4 and acidification connection are made to improve the method for intake profile, it is characterised in that: described
The molecular weight of polyacrylamide is 1300 ~ 18,000,000, degree of hydrolysis 20%-28%.
9. a kind of profile control according to claim 1 and acidification connection are made to improve the method for intake profile, which is characterized in that described
Tempered spline, by mass percentage, including following components: 15%-17% hydrochloric acid, 9%-12% hydrofluoric acid, 32%-35% di(2-ethylhexyl)phosphate
Hydrogen salt, 1%-3% acetic acid, 3%-5% ammonium fluoride, 2%-4% ferrous stability, 1.2%-2.4% corrosion inhibiter, 0.3%-0.5% cleanup additive,
Surplus is water.
10. a kind of profile control according to claim 1 and acidification connection are made to improve the method for intake profile, it is characterised in that: institute
Stating ferrous stability is that citric acid is mixed with acetic acid 6:4 in mass ratio, and corrosion inhibiter is Benzylmagnesium chloride quinoline, and cleanup additive is
Alkyl sulfonic ester salt.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114774097A (en) * | 2022-05-07 | 2022-07-22 | 陕西日新石油化工有限公司 | Injection increasing agent for water injection well of low-permeability oil reservoir and preparation method thereof |
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