CN106753296B - A kind of oil-soluble temporary plugging agent and preparation method thereof for oil-water well refracturing - Google Patents
A kind of oil-soluble temporary plugging agent and preparation method thereof for oil-water well refracturing Download PDFInfo
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- CN106753296B CN106753296B CN201611062302.7A CN201611062302A CN106753296B CN 106753296 B CN106753296 B CN 106753296B CN 201611062302 A CN201611062302 A CN 201611062302A CN 106753296 B CN106753296 B CN 106753296B
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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
- 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
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- 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
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- 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
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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
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- 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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- 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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Abstract
The present invention provides a kind of oil-soluble temporary plugging agents for oil-water well refracturing, by the material composition of following mass percent: water 15%~25%, phenol-formaldehyde resin modified 15%~25%, dcpd resin 10%~20%, fatty acid glycerine esters surfactant 10%~30%, sodium chloride 20%~30%.The oil solution ratio of this oil-soluble temporary plugging agent provided by the invention is high and solution rate is fast；It is higher than conventional oil-soluble temporary plugging agent plugging strength, it can satisfy the needs of pressing crack construction；It can quickly be dissolved after pressing crack construction, not pollute reservoir, play the role of blocking crack in pressing crack construction, and dosage is few, dosage reduces 40%-50% compared with conventional oil-soluble temporary plugging agent, to reduce construction cost；Simple production process of the present invention, it is easy to promote and utilize.
Description
Technical field
The invention belongs to multiple fracturing technique fields, and in particular to a kind of oil-soluble for oil-water well refracturing temporarily blocks up
Agent and preparation method thereof.
Background technique
Hydraulic fracturing is one of the major technique of Low permeable oil and gas reservoirs transformation, but the oil/gas well after hydraulic fracturing,
After producing a period of time, pressure break can be caused to fail due to many.In addition, also some fracturing works cause payzone after implementing
Pollution, can also make pressure break fall flat.To this kind of oil/gas well, it is desirable to increase production capacity, majority must take refracturing
It is transformed.Temporarily stifled fracturing technique is mainly used to solve the layer position that oil water relation complexity, microcrack are extremely developed in oil reservoir.Water filling
Oil field is after exploitation after a period of time, and most of low permeability pays have been in High water cut state, and the crude oil of old Crack Control is
Close to all extraction, crack is at main exhalant canal, but still control has certain residue to certain wells under existing mining conditions
Recoverable reserves gives full play to the production potential of oil well for water-control oil-increasing, we are using temporarily stifled multiple fracturing technique, essence
Be selectively enter and effectively block original fracturing fracture and preforation tunnel using a kind of sealing agent, then in new eyelet into
Row pressure break opens new seam；Or part blocks old crack, opens new crack again in old crack cover, so that new oil flow channel is provided, with
So that crack is altered course when ensureing refracturing, form new crack, to produce minimum stress direction or close to minimum principal stress side
To the crude oil of drainage area, water-control oil-increasing is realized.
In currently used diverting agent, oil-soluble temporary plugging agent to obtain the height weight of people in recent years the advantages of its own
Depending on becoming one of direction of primary study.In pressing crack construction, oil-soluble temporary plugging agent is squeezed near wellbore and near wellbore zone
When, soften under strata pressure, temperature action, block original rock fracture, forms shielding, effectively prevent fracturing fluid
Liquid enters old crack.After the completion of pressing crack construction, diverting agent can dissolve in crude oil again, and after being discharged with crude oil, in-place permeability is extensive
It is multiple, it is effectively protected oil-gas Layer.And currently used oil-soluble temporary plugging agent is mostly used for water blockoff, in workover treatment, plugging strength
Lower, plugging effect is bad if in the pressing crack construction being used under elevated pressures.In addition, since material source is limited and preparation side
Method is cumbersome, oil-soluble temporary plugging agent often higher cost.
Summary of the invention
The purpose of the present invention is to provide a kind of pressure break oil-soluble temporary plugging agents, and plugging strength with higher can
For the purpose of pressure break, and oil solution ratio is high, can be discharged with crude oil, smaller to formation damage.
To achieve the goals above, the technical solution of the present invention is as follows:
A kind of oil-soluble temporary plugging agent for oil-water well refracturing, by the material composition of following mass percent: water 15%
~25%, phenol-formaldehyde resin modified 15%~25%, dcpd resin 10%~20%, fatty acid glycerine esters surfactant 10%
~30%, sodium chloride 20%~30%.
A kind of oil-soluble temporary plugging agent for oil-water well refracturing, by the material composition of following mass percent: water
20%, phenol-formaldehyde resin modified 20%, dcpd resin 15%, fatty acid glycerine esters surfactant 20%, sodium chloride 25%.
The phenol-formaldehyde resin modified is Effect of Organosilicon-modified Phenol-formaldehyde Resin or dimethylbenzene phenol-formaldehyde resin modified.
The fatty acid glycerine esters surfactant is glycerine monofatty ester or fatty acid double glyceride surface-active
Agent.
The present invention also provides a kind of preparation method of oil-soluble temporary plugging agent for oil-water well refracturing, including it is following
Step:
The water of formula ratio is added in high-temperature closed smelting furnace and is heated to 50 DEG C by step 1), then by the fatty acid glycerine of formula ratio
Esters surface active agent is added in smelting furnace and is sufficiently stirred, and is completely dissolved surfactant；
Step 2 heated solution is to 75 ~ 80 DEG C and keeps constant temperature, and the phenol-formaldehyde resin modified of formula ratio is added later, and stirring is equal
It is even；
Then dcpd resin is added in step 3) makes it melt and stir evenly, and is eventually adding sodium chloride and stirs 2
Hour, stop heating；
Step 4) pours into the solution stirred evenly in centrifuge container, is sprayed solution in the form of drop by centrifugal action
It spills to cooling pond, cooling and solidifying is pulled out after 30 minutes and dries and filter out particle that partial size is 3-7mm i.e. with standard screen
?.
The centrifuge container bottom is evenly distributed with the circular hole that diameter is 3-7mm, and relative centrifugal force range is 1000g-
5000g。
The beneficial effects of the present invention are: the oil solution ratio height and solution rate of this oil-soluble temporary plugging agent provided by the invention
Fastly；It is higher than conventional oil-soluble temporary plugging agent plugging strength, it can satisfy the needs of pressing crack construction；It can be fast instant after pressing crack construction
Solution, does not pollute reservoir, plays the role of blocking crack in pressing crack construction.
Fracturing fluid enters before stratum in pressing crack construction, and the oil that 5%-6% is uniformly added in mass ratio in fracturing fluid is molten
Property diverting agent, dosage is few, with conventional oil-soluble temporary plugging agent compared to dosage reduction 40%-50%, to reduce construction cost；This hair
Bright simple production process, it is easy to promote and utilize.
It will be described in further details below.
Specific embodiment
Embodiment 1:
A kind of oil-soluble temporary plugging agent for oil-water well refracturing is present embodiments provided, by following mass percent
Material composition: water 15%~25%, phenol-formaldehyde resin modified 15%~25%, dcpd resin 10%~20%, fatty glyceride
Class surfactant 10%~30%, sodium chloride 20%~30%.
The principle of the invention: phenol-formaldehyde resin modified has preferable toughness and heat resistance, for improving the temporary stifled strong of diverting agent
Degree and temperature resistant capability；Dcpd resin (DCPD resin) has high caking property, primarily serves bonding and forming and hardening
Effect；Fatty acid glycerine esters surfactant plays the role of emulsifying resins；Sodium chloride, which plays, adjusts diverting agent dissolution speed
The effect of rate.
Embodiment 2:
On the basis of embodiment 1, a kind of oil-soluble temporary plugging agent for oil-water well refracturing is present embodiments provided,
By the material composition of following mass percent: water 20%, phenol-formaldehyde resin modified 15%, dcpd resin 10%, fatty acid glycerine
Esters surface active agent 25%, sodium chloride 30%.
Preparation process: the water of 20Kg is added in high-temperature closed smelting furnace and is heated to 50 DEG C by step 1), then by 25Kg rouge
Fatty acid glyceride class surfactant is added in smelting furnace and is sufficiently stirred, and is completely dissolved surfactant；Step 2 heating
Solution is simultaneously kept for 75 ~ 80 DEG C, and addition phenol-formaldehyde resin modified 15Kg is stirred evenly；Step 3) adds dcpd resin
10Kg makes it melt and stir evenly；It is eventually adding sodium chloride 30Kg and stirs 2 hours, stop heating；Step 4) will stir equal
Even solution is poured into centrifuge container, and centrifuge container is rotated with given pace and passes through centrifugal action for mixed liquor with drop
Form is sprayed in cooling pond, is cooled and solidified drop in cooling pond 30 minutes, is then pulled out and dry and use standard screen
Filtering out the particle that partial size is 3-7mm is this diverting agent.
In the present embodiment, phenol-formaldehyde resin modified is Effect of Organosilicon-modified Phenol-formaldehyde Resin, fatty acid glycerine esters surfactant
For glycerine monofatty ester.
Softening temperature test: the tool plug graduated cylinder that 10g diverting agent sample is put into clean dried is built in thermostat water bath,
It is started to warm up from 30 DEG C, 1 DEG C of every heating is kept for 5 minutes, the light pressure-like product of holding stage glass bar, when sample starts softening transform
Corresponding water bath temperature is denoted as the softening temperature of diverting agent.The softening temperature of this oil-soluble temporary plugging agent measured is 45 DEG C.
Dissolution time test: 5g diverting agent sample is packed into the port grinding bottle equipped with 100ml kerosene, after being stirred with glass bar
It is placed in 40 DEG C of waters bath with thermostatic control and is started timing, when sample all becomes white crystals particle, 50ml water is added, stirs to complete
Fully dissolved stops timing and is denoted as dissolution time.The dissolution time of this oil-soluble temporary plugging agent measured is 50 minutes.
Embodiment 3:
On the basis of embodiment 1, a kind of oil-soluble temporary plugging agent for oil-water well refracturing is present embodiments provided,
By the material composition of following mass percent: water 20%, phenol-formaldehyde resin modified 20%, dcpd resin 15%, fatty acid glycerine
Esters surface active agent 20%, sodium chloride 25%.
Preparation process: the water of 20Kg is added in high-temperature closed smelting furnace and is heated to 50 DEG C by step 1), then by 20Kg rouge
Fatty acid glyceride class surfactant is added in smelting furnace and is sufficiently stirred, and is completely dissolved surfactant；Step 2 heating
Solution is simultaneously kept for 75 ~ 80 DEG C, and addition phenol-formaldehyde resin modified 20Kg is stirred evenly；Step 3) adds dcpd resin
15Kg makes it melt and stir evenly；It is eventually adding sodium chloride 25Kg and stirs 2 hours, stop heating；Step 4) will stir equal
Even solution is poured into centrifuge container, and centrifuge container is rotated with given pace and passes through centrifugal action for mixed liquor with drop
Form is sprayed in cooling pond, is cooled and solidified drop in cooling pond 30 minutes, is then pulled out and dry and use standard screen
Filtering out the particle that partial size is 3-7mm is this diverting agent.
In the present embodiment, phenol-formaldehyde resin modified is dimethylbenzene phenol-formaldehyde resin modified, fatty acid glycerine esters surfactant
For glycerine monofatty ester.
Softening temperature test: the tool plug graduated cylinder that 10g diverting agent sample is put into clean dried is built in thermostat water bath,
It is started to warm up from 30 DEG C, 1 DEG C of every heating is kept for 5 minutes, the light pressure-like product of holding stage glass bar, when sample starts softening transform
Corresponding water bath temperature is denoted as the softening temperature of diverting agent.The softening temperature of this oil-soluble temporary plugging agent measured is 48 DEG C.
Dissolution time test: 5g diverting agent sample is packed into the port grinding bottle equipped with 100ml kerosene, after being stirred with glass bar
It is placed in 40 DEG C of waters bath with thermostatic control and is started timing, when sample all becomes white crystals particle, 50ml water is added, stirs to complete
Fully dissolved stops timing and is denoted as dissolution time.The dissolution time of this oil-soluble temporary plugging agent measured is 55 minutes.
Embodiment 4:
On the basis of embodiment 1, a kind of oil-soluble temporary plugging agent for oil-water well refracturing is present embodiments provided,
By the material composition of following mass percent: water 20%, phenol-formaldehyde resin modified 25%, dcpd resin 20%, fatty acid glycerine
Esters surface active agent 15%, sodium chloride 20%.
Preparation process: the water of 20Kg is added in high-temperature closed smelting furnace and is heated to 50 DEG C by step 1), then by 15Kg rouge
Fatty acid glyceride class surfactant is added in smelting furnace and is sufficiently stirred, and is completely dissolved surfactant；Step 2 heating
Solution is simultaneously kept for 75 ~ 80 DEG C, and addition phenol-formaldehyde resin modified 25Kg is stirred evenly；Step 3) adds dcpd resin
20Kg makes it melt and stir evenly；It is eventually adding sodium chloride 20Kg and stirs 2 hours, stop heating；Step 4) will stir equal
Even solution is poured into centrifuge container, and centrifuge container is rotated with given pace and passes through centrifugal action for mixed liquor with drop
Form is sprayed in cooling pond, is cooled and solidified drop in cooling pond 30 minutes, is then pulled out and dry and use standard screen
Filtering out the particle that partial size is 3-7mm is this diverting agent.
In the present embodiment, phenol-formaldehyde resin modified is Effect of Organosilicon-modified Phenol-formaldehyde Resin, fatty acid glycerine esters surfactant
For fatty acid double glyceride surfactant.
Effect of Organosilicon-modified Phenol-formaldehyde Resin or dimethylbenzene phenol-formaldehyde resin modified water resistance and resistance to acid and alkali are preferable.
Softening temperature test: the tool plug graduated cylinder that 10g diverting agent sample is put into clean dried is built in thermostat water bath,
It is started to warm up from 30 DEG C, 1 DEG C of every heating is kept for 5 minutes, the light pressure-like product of holding stage glass bar, when sample starts softening transform
Corresponding water bath temperature is denoted as the softening temperature of diverting agent.The softening temperature of this oil-soluble temporary plugging agent measured is 52 DEG C.
Dissolution time test: 5g diverting agent sample is packed into the port grinding bottle equipped with 100ml kerosene, after being stirred with glass bar
It is placed in 40 DEG C of waters bath with thermostatic control and is started timing, when sample all becomes white crystals particle, 50ml water is added, stirs to complete
Fully dissolved stops timing and is denoted as dissolution time.The dissolution time of this oil-soluble temporary plugging agent measured is 58 minutes.
In the above various embodiments, centrifuge container bottom is evenly distributed with the circular hole that diameter is 3-7mm, relative centrifugal force range
For 1000g-5000g；Slewing rate is adjustable, big to adjust diverting agent partial size by the slewing rate for adjusting centrifuge container
It is small, to meet Different Strata demand.Effect of Organosilicon-modified Phenol-formaldehyde Resin or dimethylbenzene phenol-formaldehyde resin modified are commercial product.
Oil-soluble temporary plugging agent fracturing fluid in pressing crack construction enters before stratum, uniformly adds in fracturing fluid in mass ratio
The product of 5%-6%.
From the above experiment as can be seen that the softening temperature of diverting agent provided by the invention is between 40 DEG C -60 DEG C, completely
Meet live pressing crack construction requirement；Compared with other similar products, rate of dissolution is greatly improved, can be fast instant after pressing crack construction
Solution, does not pollute reservoir.
The common knowledge for the method and apparatus structure category industry that the above various embodiments does not describe in detail, here not one by one
Narration.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.
Claims (2)
1. a kind of preparation method of the oil-soluble temporary plugging agent for oil-water well refracturing, which is characterized in that this is used for oil-water well
The oil-soluble temporary plugging agent of refracturing, by the material composition of following mass percent: water 15%~25%, phenol-formaldehyde resin modified 15%
~25%, dcpd resin 10%~20%, fatty acid glycerine esters surfactant 10%~30%, sodium chloride 20%~30%；
The phenol-formaldehyde resin modified is Effect of Organosilicon-modified Phenol-formaldehyde Resin；
The fatty acid glycerine esters surfactant is glycerine monofatty ester or fatty acid double glyceride surfactant；
Method includes the following steps:
The water of formula ratio is added in high-temperature closed smelting furnace and is heated to 50 DEG C by step 1), then by the fatty acid glycerine of formula ratio
Esters surface active agent is added in smelting furnace and is sufficiently stirred, and is completely dissolved surfactant；
Step 2 heated solution is to 75 ~ 80 DEG C and keeps constant temperature, and the phenol-formaldehyde resin modified of formula ratio is added later, stirs evenly；
Then dcpd resin is added in step 3) makes it melt and stir evenly, and is eventually adding sodium chloride and stirs 2 hours,
Stop heating；
Step 4) pours into the solution stirred evenly in centrifuge container, is sprayed to solution in the form of drop by centrifugal action
In cooling pond, cooling and solidifying is pulled out after 30 minutes and dries and filter out particle that partial size is 3-7mm with standard screen to obtain the final product.
2. a kind of preparation method of oil-soluble temporary plugging agent for oil-water well refracturing according to claim 1, special
Sign is: the centrifuge container bottom is evenly distributed with the circular hole that diameter is 3-7mm, and relative centrifugal force range is 1000g-
5000g。
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| CN109181662A (en) * | 2018-09-19 | 2019-01-11 | 北京大德广源石油技术服务有限公司 | Refracturing diverting agent and refracturing method |
| CN111334264A (en) * | 2020-03-09 | 2020-06-26 | 浙江神耀石化科技有限公司 | Temporary plugging agent and preparation method thereof |
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| US3954629A (en) * | 1974-06-03 | 1976-05-04 | Union Oil Company Of California | Polymeric diverting agent |
| CN101121879A (en) * | 2007-07-28 | 2008-02-13 | 夏自鸣 | Oil soluble powder pottery |
| CN102093864A (en) * | 2010-12-21 | 2011-06-15 | 中国石油天然气股份有限公司 | Temporary plugging diversion agent for refracturing of oil-water well and preparation method thereof |
| CN104388068A (en) * | 2014-11-21 | 2015-03-04 | 天津大港油田滨港集团博弘石油化工有限公司 | High-temperature oil-soluble temporary plugging agent and preparation method thereof |
| CN105062443A (en) * | 2015-07-24 | 2015-11-18 | 中国石油天然气股份有限公司 | Oil-soluble temporary plugging agent and preparation method therefor |
| CN105441047A (en) * | 2015-11-30 | 2016-03-30 | 长江大学 | Oil-soluble hydraulic fracture temporary plugging reorientation agent and preparation method thereof |
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2016
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| US3954629A (en) * | 1974-06-03 | 1976-05-04 | Union Oil Company Of California | Polymeric diverting agent |
| CN101121879A (en) * | 2007-07-28 | 2008-02-13 | 夏自鸣 | Oil soluble powder pottery |
| CN102093864A (en) * | 2010-12-21 | 2011-06-15 | 中国石油天然气股份有限公司 | Temporary plugging diversion agent for refracturing of oil-water well and preparation method thereof |
| CN104388068A (en) * | 2014-11-21 | 2015-03-04 | 天津大港油田滨港集团博弘石油化工有限公司 | High-temperature oil-soluble temporary plugging agent and preparation method thereof |
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Effective date of registration: 20201029 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: 710016 Changqing science and technology building, four Fengcheng Road, Xi'an, Shaanxi Patentee before: CNPC CHUANQING DRILLING ENGINEERING COMPANY LIMITED ENGINEERING TECHNOLOGY Research Institute |