CN106753296A - A kind of oil-soluble temporary plugging agent for oil-water well refracturing and preparation method thereof - Google Patents
A kind of oil-soluble temporary plugging agent for oil-water well refracturing and preparation method thereof Download PDFInfo
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- CN106753296A CN106753296A CN201611062302.7A CN201611062302A CN106753296A CN 106753296 A CN106753296 A CN 106753296A CN 201611062302 A CN201611062302 A CN 201611062302A CN 106753296 A CN106753296 A CN 106753296A
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- temporary plugging
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims description 10
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 30
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000004094 surface-active agent Substances 0.000 claims abstract description 26
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 25
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 20
- 229930195729 fatty acid Natural products 0.000 claims abstract description 20
- 239000000194 fatty acid Substances 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 17
- -1 fatty acid glycerine esters Chemical class 0.000 claims abstract description 15
- 239000011780 sodium chloride Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 26
- 239000002245 particle Substances 0.000 claims description 14
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical group OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 12
- 238000003723 Smelting Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 6
- 235000011187 glycerol Nutrition 0.000 claims description 6
- FMQIVIZUDKQNEY-UHFFFAOYSA-N formaldehyde;phenol;1,2-xylene Chemical compound O=C.OC1=CC=CC=C1.CC1=CC=CC=C1C FMQIVIZUDKQNEY-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 125000001931 aliphatic group Chemical group 0.000 claims description 3
- 125000005456 glyceride group Chemical group 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 2
- 150000004665 fatty acids Chemical class 0.000 claims description 2
- 239000012467 final product Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 15
- 238000003825 pressing Methods 0.000 abstract description 13
- 238000004090 dissolution Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 10
- 239000011521 glass Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000010779 crude oil Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 239000003350 kerosene Substances 0.000 description 3
- 230000004224 protection Effects 0.000 description 3
- 239000003643 water by type Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 2
- HECLRDQVFMWTQS-UHFFFAOYSA-N Dicyclopentadiene Chemical compound C1C2C3CC=CC3C1C=C2 HECLRDQVFMWTQS-UHFFFAOYSA-N 0.000 description 1
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000009466 transformation Effects 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
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
-
- 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
-
- 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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- 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)
- Phenolic Resins Or Amino Resins (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention provides 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%.The oil solution ratio of this oil-soluble temporary plugging agent that the present invention is provided is high and dissolution velocity is fast；It is higher than conventional oil-soluble temporary plugging agent plugging strength, the need for pressing crack construction being met；Can quickly be dissolved after pressing crack construction, not pollute reservoir, play a part of to block crack in pressing crack construction, and consumption is few, 40% 50% be reduced compared to consumption with conventional oil-soluble temporary plugging agent, so as to reduce construction cost；Simple production process of the present invention, it is easy to utilize.
Description
Technical field
The invention belongs to multiple fracturing technique field, and in particular to a kind of oil-soluble for oil-water well refracturing is temporarily blocked up
Agent and preparation method thereof.
Background technology
Hydraulic fracturing is one of major technique of Low permeable oil and gas reservoirs transformation, but by the Oil/gas Well after hydraulic fracturing,
After production a period of time, pressure break can be caused to fail due to many reasons.In addition, also some fracturing works are caused after implementing to payzone
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
Transformed.Temporarily stifled fracturing technique is mainly used to solve the layer position that oil water relation in oil reservoir is complicated, microcrack is extremely developed.Water filling
After oil field is through exploitation after a while, most of low permeability pays have been in High water cut state, and the crude oil of old Crack Control is
Close to all producing, crack is into main exhalant canal, but some wells still control have certain residue under existing mining conditions
Recoverable reserves, for water-control oil-increasing, gives full play to the production potential of oil well, and we are using temporarily stifled multiple fracturing technique, its essence
It is selectively to be entered using a kind of sealing agent and effectively block original fracturing fracture and preforation tunnel, then enters in new eyelet
Row pressure break opens new seam；Or part blocks old crack, and new crack is opened again in old crack front cover, so that new oil flow channel is provided, with
Crack is altered course when ensureing refracturing, form new crack, so as 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 diverting agent conventional at present, oil-soluble temporary plugging agent obtains the height weight of people with the advantage of its own in recent years
Depending on one of direction as 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, original rock fracture is blocked, shielding is formed, 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
Answer, effectively reservoir protec-tion.And oil-soluble temporary plugging agent conventional at present is mostly used in water blockoff, workover treatment, plugging strength
It is relatively low, in the pressing crack construction under for elevated pressures if plugging effect it is not good.Further, since material source is limited and preparation side
Method is cumbersome, and oil-soluble temporary plugging agent is often relatively costly.
The content of the invention
It is an object of the invention to provide a kind of pressure break oil-soluble temporary plugging agent, it has plugging strength 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 these goals, the technical scheme is that：
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 aliphatic acid double glyceride surface-active
Agent.
It is present invention also offers a kind of preparation method of the oil-soluble temporary plugging agent for oil-water well refracturing including following
Step：
Step 1）The water of formula ratio is added to 50 DEG C are heated in high-temperature closed smelting furnace, then by the fatty acid glycerine of formula ratio
Esters surface active agent is added in smelting furnace and is sufficiently stirred for, 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 afterwards, stirs；
Step 3）Being subsequently adding dcpd resin makes it melt and stir, and is eventually adding sodium chloride and stirs 2 hours,
Stop heating；
Step 4）The solution for stirring is poured into centrifuge container, solution is sprayed to the form of drop by centrifugal action
In cooling pond, cooling and solidifying is pulled out to dry and filter out the particle that particle diameter is 3-7mm with standard screen and obtained final product after 30 minutes.
The centrifuge container bottom even is distributed with the circular hole of a diameter of 3-7mm, and RCF scope is 1000g-
5000g。
The beneficial effects of the invention are as follows：This oil-soluble temporary plugging agent that the present invention is provided oil solution ratio is high and dissolution velocity
Hurry up；It is higher than conventional oil-soluble temporary plugging agent plugging strength, the need for pressing crack construction being met；Can be fast instant after pressing crack construction
Solution, does not pollute reservoir, plays a part of to block crack in pressing crack construction.
Before fracturing fluid enters stratum in the pressing crack construction, the uniform oil soluble for adding 5%-6% in mass ratio in fracturing fluid
Property diverting agent, consumption is few, and 40%-50% is reduced compared to consumption with conventional oil-soluble temporary plugging agent, so as to reduce construction cost；This hair
Bright simple production process, it is easy to utilize.
To 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 the material of following mass percent
Composition：Water 15%~25%, phenol-formaldehyde resin modified 15%~25%, dcpd resin 10%~20%, fatty acid glycerine esters table
Face activating agent 10%~30%, sodium chloride 20%~30%.
The principle of the invention：Phenol-formaldehyde resin modified has preferable toughness and heat resistance, for improving the temporarily stifled strong of diverting agent
Degree and temperature resistant capability；Dcpd resin（DCPD resins）With high caking property, bonding and forming and hardening are primarily served
Effect；Fatty acid glycerine esters surfactant plays a part of emulsifying resins；Sodium chloride plays regulation diverting agent dissolving speed
The effect of rate.
Embodiment 2：
On the basis of embodiment 1, present embodiments provide a kind of oil-soluble temporary plugging agent for oil-water well refracturing, by with
The material composition of lower mass percent：Water 20%, phenol-formaldehyde resin modified 15%, dcpd resin 10%, fatty acid glycerine esters
Surfactant 25%, sodium chloride 30%.
Preparation process：Step 1）The water of 20Kg is added to 50 DEG C are heated in high-temperature closed smelting furnace, then by 25Kg fat
Fatty acid glyceride class surfactant is added in smelting furnace and is sufficiently stirred for, and is completely dissolved surfactant；Step 2）Heating
75 ~ 80 DEG C of solution and holding, add phenol-formaldehyde resin modified 15Kg, stir；Step 3）Add dcpd resin
10Kg makes it melt and stir；It is eventually adding sodium chloride 30Kg and stirs 2 hours, stops heating；Step 4）To stir equal
Even solution is poured into centrifuge container, centrifuge container rotated with given pace and by centrifugal action by mixed liquor with drop
Form is sprayed in cooling pond, drop is cooled and solidified in cooling pond 30 minutes, is then pulled out and is dried and use standard screen
Filter out particle as this diverting agent that particle diameter is 3-7mm.
In the present embodiment, phenol-formaldehyde resin modified is Effect of Organosilicon-modified Phenol-formaldehyde Resin, fatty acid glycerine esters surfactant
It is glycerine monofatty ester.
Softening temperature is tested：The tool plug graduated cylinder that 10g diverting agent samples are put into clean dried is built in thermostat water bath,
Started to warm up from 30 DEG C, often heat up 1 DEG C and kept for 5 minutes, the holding stage light pressure-like product of glass bar, when sample starts softening transform
Corresponding water-bath pot temperature is designated as the softening temperature of diverting agent.The softening temperature of this oil-soluble temporary plugging agent for measuring is 45 DEG C.
Dissolution time is tested：To 5g diverting agent samples are loaded in the port grinding bottle equipped with 100ml kerosene, after glass bar stirring
Timing is placed in 40 DEG C of waters bath with thermostatic control and started, when sample is all changed into white crystals particle, 50ml water is added, stirring is to complete
CL, stops timing and is designated as dissolution time.The dissolution time of this oil-soluble temporary plugging agent for measuring is 50 minutes.
Embodiment 3：
On the basis of embodiment 1, present embodiments provide a kind of oil-soluble temporary plugging agent for oil-water well refracturing, by with
The material composition of lower mass percent：Water 20%, phenol-formaldehyde resin modified 20%, dcpd resin 15%, fatty acid glycerine esters
Surfactant 20%, sodium chloride 25%.
Preparation process：Step 1）The water of 20Kg is added to 50 DEG C are heated in high-temperature closed smelting furnace, then by 20Kg fat
Fatty acid glyceride class surfactant is added in smelting furnace and is sufficiently stirred for, and is completely dissolved surfactant；Step 2）Heating
75 ~ 80 DEG C of solution and holding, add phenol-formaldehyde resin modified 20Kg, stir；Step 3）Add dcpd resin
15Kg makes it melt and stir；It is eventually adding sodium chloride 25Kg and stirs 2 hours, stops heating；Step 4）To stir equal
Even solution is poured into centrifuge container, centrifuge container rotated with given pace and by centrifugal action by mixed liquor with drop
Form is sprayed in cooling pond, drop is cooled and solidified in cooling pond 30 minutes, is then pulled out and is dried and use standard screen
Filter out particle as this diverting agent that particle diameter is 3-7mm.
In the present embodiment, phenol-formaldehyde resin modified is dimethylbenzene phenol-formaldehyde resin modified, fatty acid glycerine esters surfactant
It is glycerine monofatty ester.
Softening temperature is tested：The tool plug graduated cylinder that 10g diverting agent samples are put into clean dried is built in thermostat water bath,
Started to warm up from 30 DEG C, often heat up 1 DEG C and kept for 5 minutes, the holding stage light pressure-like product of glass bar, when sample starts softening transform
Corresponding water-bath pot temperature is designated as the softening temperature of diverting agent.The softening temperature of this oil-soluble temporary plugging agent for measuring is 48 DEG C.
Dissolution time is tested：To 5g diverting agent samples are loaded in the port grinding bottle equipped with 100ml kerosene, after glass bar stirring
Timing is placed in 40 DEG C of waters bath with thermostatic control and started, when sample is all changed into white crystals particle, 50ml water is added, stirring is to complete
CL, stops timing and is designated as dissolution time.The dissolution time of this oil-soluble temporary plugging agent for measuring is 55 minutes.
Embodiment 4：
On the basis of embodiment 1, present embodiments provide a kind of oil-soluble temporary plugging agent for oil-water well refracturing, by with
The material composition of lower mass percent：Water 20%, phenol-formaldehyde resin modified 25%, dcpd resin 20%, fatty acid glycerine esters
Surfactant 15%, sodium chloride 20%.
Preparation process：Step 1）The water of 20Kg is added to 50 DEG C are heated in high-temperature closed smelting furnace, then by 15Kg fat
Fatty acid glyceride class surfactant is added in smelting furnace and is sufficiently stirred for, and is completely dissolved surfactant；Step 2）Heating
75 ~ 80 DEG C of solution and holding, add phenol-formaldehyde resin modified 25Kg, stir；Step 3）Add dcpd resin
20Kg makes it melt and stir；It is eventually adding sodium chloride 20Kg and stirs 2 hours, stops heating；Step 4）To stir equal
Even solution is poured into centrifuge container, centrifuge container rotated with given pace and by centrifugal action by mixed liquor with drop
Form is sprayed in cooling pond, drop is cooled and solidified in cooling pond 30 minutes, is then pulled out and is dried and use standard screen
Filter out particle as this diverting agent that particle diameter is 3-7mm.
In the present embodiment, phenol-formaldehyde resin modified is Effect of Organosilicon-modified Phenol-formaldehyde Resin, fatty acid glycerine esters surfactant
It is aliphatic acid double glyceride surfactant.
Effect of Organosilicon-modified Phenol-formaldehyde Resin or dimethylbenzene phenol-formaldehyde resin modified water resistance and resistance to acids and bases are preferable.
Softening temperature is tested：The tool plug graduated cylinder that 10g diverting agent samples are put into clean dried is built in thermostat water bath,
Started to warm up from 30 DEG C, often heat up 1 DEG C and kept for 5 minutes, the holding stage light pressure-like product of glass bar, when sample starts softening transform
Corresponding water-bath pot temperature is designated as the softening temperature of diverting agent.The softening temperature of this oil-soluble temporary plugging agent for measuring is 52 DEG C.
Dissolution time is tested：To 5g diverting agent samples are loaded in the port grinding bottle equipped with 100ml kerosene, after glass bar stirring
Timing is placed in 40 DEG C of waters bath with thermostatic control and started, when sample is all changed into white crystals particle, 50ml water is added, stirring is to complete
CL, stops timing and is designated as dissolution time.The dissolution time of this oil-soluble temporary plugging agent for measuring is 58 minutes.
In various embodiments above, centrifuge container bottom even is distributed with the circular hole of a diameter of 3-7mm, RCF scope
It is 1000g-5000g；Slewing rate size is adjustable, adjusts diverting agent particle diameter by adjusting the slewing rate of centrifuge container big
It is small, to meet Different Strata demand.Effect of Organosilicon-modified Phenol-formaldehyde Resin or dimethylbenzene phenol-formaldehyde resin modified are commercially available prod.
Oil-soluble temporary plugging agent is uniformly added before fracturing fluid enters stratum in the pressing crack construction in fracturing fluid in mass ratio
The product of 5%-6%.
Experiment can be seen that the softening temperature of the diverting agent that the present invention is provided between 40 DEG C -60 DEG C, completely more than
Meet live pressing crack construction requirement；Compared with other like products, rate of dissolution is greatly improved, can be fast instant after pressing crack construction
Solution, does not pollute reservoir.
The method and apparatus structure that various embodiments above is not described in detail belongs to the common knowledge of the industry, here not one by one
Narration.
It is exemplified as above be only to of the invention for example, do not constitute the limitation to protection scope of the present invention, it is all
It is that design same or analogous with the present invention is belonged within protection scope of the present invention.
Claims (6)
1. a kind of oil-soluble temporary plugging agent for oil-water well refracturing, it is characterised in that by the material of following mass percent
Composition：Water 15%~25%, phenol-formaldehyde resin modified 15%~25%, dcpd resin 10%~20%, fatty acid glycerine esters table
Face activating agent 10%~30%, sodium chloride 20%~30%.
2. a kind of oil-soluble temporary plugging agent for oil-water well refracturing according to claim 1, it is characterised in that：By with
The material composition of lower mass percent：Water 20%, phenol-formaldehyde resin modified 20%, dcpd resin 15%, fatty acid glycerine esters
Surfactant 20%, sodium chloride 25%.
3. a kind of oil-soluble temporary plugging agent for oil-water well refracturing according to claim 1, it is characterised in that：It is described
Phenol-formaldehyde resin modified is Effect of Organosilicon-modified Phenol-formaldehyde Resin or dimethylbenzene phenol-formaldehyde resin modified.
4. a kind of oil-soluble temporary plugging agent for oil-water well refracturing according to claim 1, it is characterised in that：It is described
Fatty acid glycerine esters surfactant is glycerine monofatty ester or aliphatic acid double glyceride surfactant.
5. the preparation method of a kind of oil-soluble temporary plugging agent for oil-water well refracturing according to claim 1, it is special
Levy and be, comprise the following steps：
Step 1）The water of formula ratio is added to 50 DEG C are heated in high-temperature closed smelting furnace, then by the fatty acid glycerine of formula ratio
Esters surface active agent is added in smelting furnace and is sufficiently stirred for, 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 afterwards, stirs；
Step 3）Being subsequently adding dcpd resin makes it melt and stir, and is eventually adding sodium chloride and stirs 2 hours,
Stop heating；
Step 4）The solution for stirring is poured into centrifuge container, solution is sprayed to the form of drop by centrifugal action
In cooling pond, cooling and solidifying is pulled out to dry and filter out the particle that particle diameter is 3-7mm with standard screen and obtained final product after 30 minutes.
6. the preparation method of a kind of oil-soluble temporary plugging agent for oil-water well refracturing according to claim 5, it is special
Levy and be：The centrifuge container bottom even is distributed with the circular hole of a diameter of 3-7mm, and RCF scope is 1000g-
5000g。
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| CN201611062302.7A CN106753296B (en) | 2016-11-28 | 2016-11-28 | A kind of oil-soluble temporary plugging agent and preparation method thereof for oil-water well refracturing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3954629A (en) * | 1974-06-03 | 1976-05-04 | Union Oil Company Of California | Polymeric diverting agent |
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| 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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| CN106753296B (en) | 2019-10-22 |
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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 Co.,Ltd. |