CN109233774A - A kind of de-plugging agent and its preparation method and application - Google Patents
A kind of de-plugging agent and its preparation method and application Download PDFInfo
- Publication number
- CN109233774A CN109233774A CN201710561339.2A CN201710561339A CN109233774A CN 109233774 A CN109233774 A CN 109233774A CN 201710561339 A CN201710561339 A CN 201710561339A CN 109233774 A CN109233774 A CN 109233774A
- Authority
- CN
- China
- Prior art keywords
- agent
- plugging
- water
- host
- pretreating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
-
- 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
- C09K8/5086—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/26—Gel breakers other than bacteria or enzymes
Abstract
The invention discloses a kind of de-plugging agents and its preparation method and application, belong to field of oilfield exploitation.The de-plugging agent includes: pretreating agent and host agent；The volume ratio of pretreating agent and host agent are as follows: 15~25:25~35；Pretreating agent includes the following components'mass percentage: nonionic surfactant 2%~3%, mud acid 2%~5%, expansion-resisting agent 3%~5%, surplus are water；Host agent includes the following components'mass percentage: oxidant 8%~12%, polymeric alcohol 2%~3%, surplus are water.When in use, first injection allocation pretreating agent, then injection allocation host agent.By the synergistic effect of nonionic surfactant, mud acid, expansion-resisting agent, water in pretreating agent, the thick substances in reservoir are stripped down, swelling clay mineral is prevented, to dredge reservoir.By the synergistic effect of oxidant, polymeric alcohol, water in host agent, the thick substances stripped down are made to break glue, and be decomposed into small molecule, with efficient de-plugging, host agent can also form hydrophobic film, be not easily accessible the components such as oxidant in reservoir, and then protect reservoir.
Description
Technical field
The present invention relates to field of oilfield exploitation, in particular to a kind of de-plugging agent and its preparation method and application.
Background technique
In the later period exploitation in oil field, technique of polymer flooding is mostly used to improve crude oil production efficiency.However, with poly-
The number for closing object drive increases and the concentration of polymer flooding polymer gel profile control agent increases, and polymer gel profile control agent holds
Aggregation is concentrated easily at the pore throat of near wellbore zone, forms thick substances, and polymer gel profile control agent is easy in the hole of reservoir
It is adsorbed in gap, this makes the imbibition index of reservoir die-off, and increases the injection pressure of water injection well.In addition, the liquid of injection water injection well
Body contains the harmful bacteria for being also easy to produce thick substances, and thick substances are easy to form sticky indissoluble object with metal ion, and block
Circulation road, this equally increases the injection pressure of water injection well.The injection pressure of water injection well increases, and is unfavorable for later period injection allocation, also deposits
In security risk.Based on above-mentioned it is found that it is very necessary for providing a kind of de-plugging agent for decomposing or dissolving above-mentioned thick substances
's.
The de-plugging agent that the prior art provides includes chlorine dioxide, potassium permanganate, hydrogen peroxide, Compound-acid etc..Wherein, titanium dioxide
Chlorine, potassium permanganate, hydrogen peroxide have strong oxidizing property, can play the role of aoxidizing broken glue, so that thick substances decompose, Jin Erti
The permeability of high reservoir.Compound-acid is the joint product of the acid such as hydrochloric acid, sulfuric acid, mud acid, can make thick substances in reservoir, with
And can acid-soluble material dissolution, and then improve reservoir permeability.
The inventor finds that the existing technology has at least the following problems:
Chlorine dioxide in the prior art, potassium permanganate, hydrogen peroxide etc. have strong oxidizing property, are easy that it occurs in reservoir
His oxidation reaction, damages reservoir, and oxidation reaction product can also block flow channels, plugging removal effect is poor.And it is compound
Acid cannot sufficiently dissolve thick substances (mixture of such as dead oil and polymer gel), and plugging removal effect is poor.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that reservoir will not be damaged by providing one kind, de-plugging
The good de-plugging agent and its preparation method and application of effect.Specific technical solution is as follows:
In a first aspect, the de-plugging agent includes: pretreating agent and host agent the embodiment of the invention provides a kind of de-plugging agent；
The volume ratio of the pretreating agent and the host agent are as follows: 15~25:25~35.
The pretreating agent includes the following components'mass percentage: nonionic surfactant 2%~3%, mud acid 2%
~5%, expansion-resisting agent 3%~5%, surplus are water.
The host agent includes the following components'mass percentage: oxidant 8%~12%, polymeric alcohol 2%~3%, surplus
For water.
Specifically, preferably, the nonionic surfactant is nonylphenol polyoxyethylene ether.
Specifically, preferably, the expansion-resisting agent is potassium chloride and/or sodium chloride.
Specifically, preferably, the host agent further include: the activator that mass percent is 1%~2%.
Specifically, preferably, the activator is disodium-hydrogen and/or sodium bicarbonate.
Specifically, preferably, the oxidant is potassium peroxydisulfate and/or sodium peroxydisulfate.
Specifically, preferably, the polymeric alcohol is in diethylene glycol, glycerine, two polyglycerols, three polyglycerols
At least one.
Second aspect, the embodiment of the invention also provides the preparation methods of the de-plugging agent, which comprises
According to the mass percent of each component, water, nonionic surfactant, expansion-resisting agent are added into the first reaction kettle,
And the first preset time is stirred under the first preset temperature, it adds mud acid and stirs evenly, and carry out first and stand activation, obtain
Pretreating agent.
Add water, optional activator, oxidant into the second reaction kettle, and stirring second is default under the second preset temperature
Then time adds polymeric alcohol and stirs evenly, and carry out second and stand activation, obtains host agent.
Specifically, preferably, first preset time is 10~20min, first preset temperature is 20~30
℃。
Second preset time is 15~25min, and second preset temperature is 50~60 DEG C.
Described first time for standing activation and the second standing activation was 2~3h.
The third aspect, the embodiment of the invention also provides application of the de-plugging agent in water injection well de-plugging, described
In, the injection allocation pretreating agent first in the water injection well to de-plugging, then injection allocation host agent；
The injection discharge capacity of the pretreating agent and the host agent is 1.5~2m3/h。
Technical solution provided in an embodiment of the present invention has the benefit that
De-plugging agent provided in an embodiment of the present invention, when in use, the injection allocation pretreating agent first into the water injection well to de-plugging,
Then injection allocation host agent.By the synergistic effect of nonionic surfactant, mud acid, expansion-resisting agent, water in pretreating agent, by reservoir
In thick substances strip down, prevent swelling clay mineral, to dredge reservoir, improve the permeability of reservoir.By in host agent
Oxidant, polymeric alcohol, water synergistic effect, so that the thick substances stripped down is broken glue, and be decomposed into small molecule, efficiently to solve
It is stifled.Host agent with said components can also form hydrophobic film, be not easily accessible the components such as oxidant in reservoir, and then protect storage
Layer.By the synergistic effect of pretreating agent and host agent, plugging removal effect is not only acted as, reservoir is also protected.
Specific embodiment
Unless otherwise defined, all technical terms used in the embodiment of the present invention all have usual with those skilled in the art
The identical meaning understood.It to make the object, technical solutions and advantages of the present invention clearer, below will be to embodiment party of the present invention
Formula is described in further detail.
In a first aspect, the de-plugging agent includes: pretreating agent and host agent the embodiment of the invention provides a kind of de-plugging agent；In advance
The volume ratio of inorganic agent and host agent are as follows: 15~25:25~35.Wherein, pretreating agent includes the following components'mass percentage: non-
Ionic surface active agent 2%~3%, mud acid 2%~5%, expansion-resisting agent 3%~5%, surplus are water.Host agent includes following quality
The component of percentage: oxidant 8%~12%, polymeric alcohol 2%~3%, surplus are water.
De-plugging agent provided in an embodiment of the present invention, when in use, the injection allocation pretreating agent first into the water injection well to de-plugging,
Then injection allocation host agent.By the synergistic effect of nonionic surfactant, mud acid, expansion-resisting agent, water in pretreating agent, by reservoir
In thick substances strip down, prevent swelling clay mineral, to dredge reservoir, improve the permeability of reservoir.By in host agent
Oxidant, polymeric alcohol, water synergistic effect, so that the thick substances stripped down is broken glue, and be decomposed into small molecule, efficiently to solve
It is stifled.Host agent with said components can also form hydrophobic film, be not easily accessible the components such as oxidant in reservoir, and then protect storage
Layer.By the synergistic effect of pretreating agent and host agent, plugging removal effect is not only acted as, reservoir is also protected.
For de-plugging efficient under the synergistic effect of pretreating agent and host agent, the volume ratio of pretreating agent and host agent are as follows: 15
~25:25~35, such as can be 15:25,15:30,15:35,20:25,20:30,20:35,25:25,25:30,25:35
Deng.
The mass percent of nonionic surfactant is 2%~3%, for example, can for 2%, 2.2%, 2.4%,
2.6%, 2.8%, 3% etc., the mass percent of mud acid is 2%~5%, such as can be 2%, 3%, 4%, 5% etc., is prevented swollen
The mass percent of agent is 3%~5%, such as can be 3%, 4%, 5% etc., and surplus is water.Pass through above-mentioned mass percent
Nonionic surfactant, mud acid, expansion-resisting agent, water synergistic effect, make pretreating agent have excellent removing, infiltration, prevent
The only performances such as clay swell, efficiently to dredge flow channels.
The mass percent of oxidant is 8%~12%, such as can be 8%, 9%, 10%, 11%, 12% etc., polymerization
The mass percent of alcohol is 2%~3%, such as can be 2%, 2.2%, 2.4%, 2.6%, 2.8%, 3% etc., and surplus is
Water.By the synergistic effect of the oxidant of above-mentioned mass percent, polymeric alcohol, water, make host agent efficient-decomposition thick substances, and makes
Reservoir surface forms hydrophobic film, is damaged to avoid reservoir.
In pretreating agent, nonionic surfactant and mud acid, expansion-resisting agent act synergistically, and make thick substances from reservoir
It is stripped down on hole, mechanical equipment.Preferably, nonionic surfactant is nonylphenol polyoxyethylene ether.
The effect that the nonionic surfactant removes thick substances is good, the mixing of also peelable dead oil and polymer gel
Object, efficiently to dredge flow channels, and it is cheap, it is easy to obtain.
In pretreating agent, expansion-resisting agent and nonionic surfactant, mud acid act synergistically, and clay mineral can be prevented swollen
It is swollen, to avoid flow channels reduction.Preferably, expansion-resisting agent is potassium chloride and/or sodium chloride, such as expansion-resisting agent can be chlorination
The mixture of potassium, sodium chloride or potassium chloride and sodium chloride.
Above two expansion-resisting agent and the preventive effect of expansion that other components act synergistically are good, cheap, are easy to obtain.
In pretreating agent, mud acid and nonionic surfactant, expansion-resisting agent act synergistically, dissolve part thick substances and
Certain clay minerals improve the permeability of reservoir to dredge reservoir.Wherein, mud acid is the mixture of hydrofluoric acid and hydrochloric acid, for
The ratio of hydrofluoric acid and hydrochloric acid is not especially limited.Cheap, the easy acquisition of mud acid, and it is acid lucky, storage will not be injured
Layer.
In order to accelerate host agent break glue and decompose thick substances rate, adjust the pH value of host agent, and avoid injury reservoir,
Host agent further include: the activator that mass percent is 1%~2%, such as activator mass percent can for 1%,
1.2%, 1.4%, 1.6%, 1.8%, 2% etc..
In host agent, activator can have the broken glue of quickening and decomposition thick substances to be a variety of, and can adjust host agent
The reagent of pH value.Preferably, activator be disodium-hydrogen and/or sodium bicarbonate, such as activator be disodium-hydrogen,
The mixture of sodium bicarbonate or disodium-hydrogen and sodium bicarbonate.When activator is the mixed of disodium-hydrogen and sodium bicarbonate
When closing object, the mass ratio of disodium-hydrogen and sodium bicarbonate can be 1:1,1:2,1:3,2:1,2:3 etc..
It is acted synergistically by the activator and oxidant of above-mentioned mass percent, polymeric alcohol, host agent can be made efficiently to break glue
And thick substances are decomposed, and adjust the pH value of host agent, avoid injury reservoir.
In host agent, oxidant and polymeric alcohol, activator act synergistically, and can play brokenly glue and oxygenolysis thick substances
The effect of (such as polymer gel).Preferably, oxidant is potassium peroxydisulfate and/or sodium peroxydisulfate, such as oxidant can be
The mixture of potassium peroxydisulfate, sodium peroxydisulfate or potassium peroxydisulfate and sodium peroxydisulfate.
When above two oxidant and other components act synergistically, the effect for breaking glue and decomposition thick substances is good, can
Polymer gel (such as polyacrylamide) is decomposed into the small molecule for being dissolved in water.
In host agent, polymeric alcohol do not have α-hydrogen atom (in organic molecule, all carbon atoms being connected directly with functional group
Referred to as alpha -carbon atom, the hydrogen atom connecting with alpha -carbon atom are known as α-hydrogen atom), it is not easy to be oxidized agent oxidation, and in reservoir
In can form hydrophobic film, enter to prevent components such as block agents and injure reservoir.Preferably, polymeric alcohol is selected from diethyl two
At least one of alcohol, glycerine, two polyglycerols, three polyglycerols.Such as polymeric alcohol can be selected from above-mentioned four kinds of polymeric alcohols
In any one, two kinds, three kinds, four kinds.
Above-mentioned six kinds of polymeric alcohols it is cheap, be easy to obtain, and act synergistically hydrophobic easy to form with other components
Film prevents the components such as oxidant from injuring reservoir.
Second aspect, the embodiment of the invention provides the preparation methods of above-mentioned de-plugging agent, this method comprises:
According to the mass percent of each component, water, nonionic surfactant, expansion-resisting agent are added into the first reaction kettle,
And the first preset time is stirred under the first preset temperature, it adds mud acid and stirs evenly, and carry out first and stand activation, obtain
Pretreating agent.
Add water, optional activator, oxidant into the second reaction kettle, and stirring second is default under the second preset temperature
Then time adds polymeric alcohol and stirs evenly, and carry out second and stand activation, obtains host agent.
It is above-mentioned to prepare pretreating agent and the method for host agent is simple, can extemporaneous preparation, can also be by configured pretreating agent
It transports with host agent to construction site.
When in said components if there is particulate material, need to add particulate material slowly using vacuum pump suction-type
Enter in corresponding reaction kettle, in order to its high-efficiency dissolution.
First preset time is 10~20min, such as can be 10min, 12min, 14min, 16min, 18min, 20min
Deng.First preset temperature is 20~30 DEG C, such as can be 20 DEG C, 22 DEG C, 24 DEG C, 26 DEG C, 28 DEG C, 30 DEG C etc..Second is default
Time is 15~25min, such as can be 15min, 17min, 19min, 21min, 23min, 25min etc..Second preset temperature
It is 50~60 DEG C, such as can is 50 DEG C, 52 DEG C, 54 DEG C, 56 DEG C, 58 DEG C, 60 DEG C etc..First, which stands activation and second, stands work
The time of change is 2~3h, such as can be 2.2h, 2.4h, 2.6h, 2.8h, 3h etc..
The first preset time and the first preset temperature is arranged such, fills nonionic surfactant, expansion-resisting agent in water
Divide dissolution, is then uniformly mixed again with mud acid, to obtain the pretreating agent of uniform component.The second preset time and is arranged such
Two preset temperatures dissolve optional activator, oxidant sufficiently in water, are then uniformly mixed again with polymeric alcohol, to obtain
The host agent of uniform component.It was arranged such for the first time for standing activation and the second standing activation, convenient for making pretreating agent and host agent
In each ingredient play the role of collaboration enhancing, both make efficiently cooperation de-plugging.
The third aspect, the embodiment of the invention also provides application of the above-mentioned de-plugging agent in water injection well de-plugging, in the application,
The injection allocation pretreating agent first in the water injection well to de-plugging, then injection allocation host agent；
The injection discharge capacity of pretreating agent and host agent is 1.5~2m3/ h, such as can be 1.5m3/h、1.6m3/h、1.7m3/
h、1.8m3/h、1.9m3/h、2m3/ h etc..
In use, first making to fill the water well off, pretreating agent is injected in water injection well by control profile control pump, is then passed through
Profile control pump injects host agent in water injection well.The injection discharge capacity of pretreating agent and host agent is arranged such, so that the two is acted synergistically, with height
Effect makes reservoir blockages relieving, reduces the injection pressure of water injection well, while also reservoir being avoided to come to harm.
Hereinafter the present invention will be further described through by specific embodiment.
In following specific embodiments, condition person is not specified in related operation, according to normal conditions or manufacturer
It is recommended that condition carry out.It is raw materials used production firm is not specified and specification person be can be with conventional products that are commercially available.
Wherein, disodium-hydrogen (Na2HPO4), sodium bicarbonate (NaHCO3) it is purchased from six factory of Tianjin chemical reagent, potassium peroxydisulfate
(K2S2O8), sodium peroxydisulfate (Na2S2O8) it is purchased from Tianjin Ke Miou chemical reagent factory company, mud acid is purchased from six factory of Tianjin chemical reagent
Company, the concentration of hydrofluoric acid are 3%, and the concentration of hydrochloric acid is 12%.
Embodiment 1
A kind of de-plugging agent is present embodiments provided, which includes 15m3Pretreating agent and 25m3Host agent, the de-plugging agent are logical
It crosses following methods to be prepared: according to the mass percent of each component, water 93%, polyoxyethylene nonyl phenyl being added in the first reaction kettle
Vinethene 2%, KCl 3%, and 10min is stirred under conditions of 20 DEG C, then mud acid 2% is added into the first reaction kettle, stirring
Uniformly, activation 2h is stood, pretreating agent is obtained.Water 89%, NaHCO are added in the second reaction kettle31%, K2S2O88%, and
15min is stirred under conditions of 50 DEG C, then diethylene glycol 2% is added into the second reaction kettle, is stirred evenly, and activation 2h is stood,
Obtain host agent.
Embodiment 2
A kind of de-plugging agent is present embodiments provided, which includes 20m3Pretreating agent and 30m3Host agent, the de-plugging agent are logical
It crosses following methods to be prepared: according to the mass percent of each component, it is poly- that water 90.5%, nonyl phenol being added in the first reaction kettle
Ethylene oxide ether 2.5%, NaCl 4%, and 14min is stirred under conditions of 22 DEG C, then mud acid 3% is added into the first reaction kettle,
It stirs evenly, stands activation 2.4h, obtain pretreating agent.Water 87.4%, Na are added in the second reaction kettle2HPO41.2%,
Na2S2O89%, and 18min is stirred under conditions of 52 DEG C, then glycerine 2.4% is added into the second reaction kettle, stirring is equal
It is even, activation 2.4h is stood, host agent is obtained.
Embodiment 3
A kind of de-plugging agent is present embodiments provided, which includes 22m3Pretreating agent and 32m3Host agent, the de-plugging agent are logical
It crosses following methods to be prepared: according to the mass percent of each component, it is poly- that water 88.7%, nonyl phenol being added in the first reaction kettle
Ethylene oxide ether 2.8%, KCl 4.5%, and 18min is stirred under conditions of 26 DEG C, then mud acid is added into the first reaction kettle
4%, it stirs evenly, stands activation 2.6h, obtain pretreating agent.Water 84.9%, NaHCO are added in the second reaction kettle3With
Na2HPO4Mixture 1.5%, K2S2O811%, and 22min is stirred under conditions of 56 DEG C, then be added into the second reaction kettle
Two polyglycerols 2.6%, stir evenly, and stand activation 2.6h, obtain host agent.Wherein, NaHCO3With Na2HPO4Mass ratio be
1:1。
Embodiment 4
A kind of de-plugging agent is present embodiments provided, which includes 25m3Pretreating agent and 35m3Host agent, the de-plugging agent are logical
It crosses following methods to be prepared: according to the mass percent of each component, water 87%, polyoxyethylene nonyl phenyl being added in the first reaction kettle
Vinethene 3%, NaCl 5%, and 20min is stirred under conditions of 30 DEG C, then mud acid 5% is added into the first reaction kettle, stirring
Uniformly, activation 3h is stood, pretreating agent is obtained.Water 86%, Na are added in the second reaction kettle2HPO42%, K2S2O8With
Na2S2O8Mixture 12%, and 25min is stirred under conditions of 60 DEG C, then three polyglycerols are added into the second reaction kettle
3%, it stirs evenly, stands activation 3h, obtain host agent.
Application Example 1
The stripping ability for the pretreating agent in de-plugging agent that this application embodiment provides embodiment 1-4 is evaluated.Tool
Body evaluation procedure are as follows: the mixture of same amount of greasy dirt and gelatin polymer is respectively placed in five identical Clear glass bottles and jars
In, by de-plugging agent that same amount of embodiment 1-4 is provided pretreating agent and mass concentration be 3% mud acid set respectively
In five Clear glass bottles and jars, and the mixture of greasy dirt and gelatin polymer is submerged, is then placed on five Clear glass bottles and jars
In baking oven (temperature is 75 DEG C).By above-mentioned five tests, sequentially number is No. 1, No. 2, No. 3, No. 4, No. 5.After for 24 hours, five are observed
The exfoliated state of the mixture of greasy dirt and gelatin polymer in Clear glass bottles and jars, particular state is referring to the following table 1.
Table 1
| Test | The exfoliated state of the mixture of greasy dirt and gelatin polymer |
| No. 1 | Greasy dirt is separated with gelatin polymer, and greasy dirt is evenly dispersed |
| No. 2 | Greasy dirt is separated with gelatin polymer, and greasy dirt is evenly dispersed |
| No. 3 | Greasy dirt is separated with gelatin polymer, and greasy dirt is evenly dispersed |
| No. 4 | Greasy dirt is separated with gelatin polymer, and greasy dirt is evenly dispersed |
| No. 5 | Greasy dirt is not separated with the mixture of gelatin polymer |
As shown in Table 1, the pretreating agent that embodiment 1-4 is provided can separate greasy dirt with gelatin polymer, and uniformly divide
It dissipates.And mud acid solution is not easy to separate greasy dirt with the mixture of gelatin polymer.As it can be seen that de-plugging agent provided in an embodiment of the present invention
In pretreating agent have excellent stripping ability, meet de-plugging construction requirement.
Application Example 2
The gel breaking capacity for the host agent in de-plugging agent that this application embodiment provides embodiment 1-4 is evaluated.Specifically comment
Valence process are as follows: host agent that same amount of embodiment 1-4 is provided, the hydrogen peroxide solution that mass concentration is 8% are respectively placed in five
In Clear glass bottles and jars, and five Clear glass bottles and jars are placed in baking oven (temperature be 75 DEG C), for 24 hours after, take equal amount phenolic aldehyde tree
Rouge gel is individually positioned in five Clear glass bottles and jars, is rocked uniformly, and sequentially number is No. 6,7 respectively by above-mentioned five tests
Number, No. 8, No. 9, No. 10.Then respectively after 1h, 2h, 4h, the state of gelling material is observed, and exist using Mars rheometer
7.34s-1The viscosity of solution in lower measurement vial.It for the broken glue rate of phenolic resin gel, can be measured, be had by weight method
Body method are as follows: prepared phenolic resin gel is weighed as M1, it is then placed in aging in insulating box, a period of time is placed and takes out
Afterwards, elimination liquid clear liquid obtains solid elastic gel and is weighed as M2, M1-M2/M1As broken glue rate.The design parameter of acquisition referring to
Table 2.
Table 2
| Test | 1h | 2h | 4h | Phenolic resin gel breaks glue rate/% | Viscosity/mPas |
| No. 6 | It is broken | Racemulose | Uniform decomposition | 97.5 | 16 |
| No. 7 | It is broken | Racemulose | Uniform decomposition | 96.4 | 15 |
| No. 8 | It is broken | Racemulose | Uniform decomposition | 96.7 | 12 |
| No. 9 | It is broken | Racemulose | Uniform decomposition | 97.9 | 8 |
| No. 10 | It is broken | Big tufted | Racemulose | 62 | 53 |
As shown in Table 2, the host agent that embodiment 1-4 is provided can make gelling material break glue after 1h, can make to coagulate after 4h
Jelly uniform decomposition, and the viscosity of host agent and gelling material mixed liquor is reduced, it is good to the broken glue effect of phenolic resin gel.And
The gel breaking capacity of 8% hydrogen peroxide is poor.As it can be seen that the gel breaking capacity of host agent is good in de-plugging agent provided in an embodiment of the present invention, it can
Meet the requirement of de-plugging construction.
Application Example 3
This application embodiment is applied to the antihypertensive effect in water injection well to the de-plugging agent that embodiment 1-4 is provided and evaluates.
Specific evaluation procedure are as follows: de-plugging test is carried out to tetra- mouthfuls of water injection wells of a, b, c, d of certain fault-block oilfield in Ji, this four mouthfuls of water injection wells are equal
Injection allocation novalac polymer profile control agent is 35m with fluence3/ d, injection allocation time are three months, the pressure mistake of present reservoir
Greatly, it is not easy to carry out injection allocation.The de-plugging agent that embodiment 1-4 is provided is passed through respectively in profile control pump injection allocation to this four mouthfuls of water injection wells,
In process of injection allocation, first injection allocation pretreating agent, then injection allocation host agent, then stop to infuse closing well.Two days later, it measures under well head pressure respectively
Drop amount, design parameter are as shown in table 3:
Table 3
As shown in Table 3, the de-plugging agent that embodiment 1-4 is provided can be substantially reduced the pressure of reservoir, and then make water injection well well
Mouth pressure decline, in order to the injection distribution working in later period.As it can be seen that de-plugging agent provided in an embodiment of the present invention can satisfy de-plugging operation
Use demand.
The foregoing is merely presently preferred embodiments of the present invention, the protection scope being not intended to limit the invention, all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.
Claims (10)
1. a kind of de-plugging agent, which is characterized in that the de-plugging agent includes: pretreating agent and host agent；
The volume ratio of the pretreating agent and the host agent are as follows: 15~25:25~35；
The pretreating agent includes the following components'mass percentage: nonionic surfactant 2%~3%, mud acid 2%~
5%, expansion-resisting agent 3%~5%, surplus are water；
The host agent includes the following components'mass percentage: oxidant 8%~12%, polymeric alcohol 2%~3%, surplus are water.
2. de-plugging agent according to claim 1, which is characterized in that the nonionic surfactant is polyoxyethylene nonyl phenyl second
Alkene ether.
3. de-plugging agent according to claim 1, which is characterized in that the expansion-resisting agent is potassium chloride and/or sodium chloride.
4. de-plugging agent according to claim 1, which is characterized in that the host agent further include: mass percent be 1%~
2% activator.
5. de-plugging agent according to claim 4, which is characterized in that the activator is disodium-hydrogen and/or bicarbonate
Sodium.
6. de-plugging agent according to claim 1, which is characterized in that the oxidant is potassium peroxydisulfate and/or sodium peroxydisulfate.
7. de-plugging agent according to claim 1, which is characterized in that the polymeric alcohol is selected from diethylene glycol, glycerine, dimerization
At least one of glycerine, three polyglycerols.
8. the preparation method of any one of the claim 1-7 de-plugging agent, which is characterized in that the described method includes:
According to the mass percent of each component, the addition water, nonionic surfactant, expansion-resisting agent into the first reaction kettle, and
The first preset time is stirred under first preset temperature, mud acid is added and stirs evenly, and carries out first and stands activation, obtains pre- place
Manage agent；
Into the second reaction kettle plus water, optional activator, oxidant, and when stirring second is default under the second preset temperature
Between, it then adds polymeric alcohol and stirs evenly, and carry out second and stand activation, obtain host agent.
9. according to the method described in claim 8, it is characterized in that, first preset time be 10~20min, described first
Preset temperature is 20~30 DEG C；
Second preset time is 15~25min, and second preset temperature is 50~60 DEG C；
Described first time for standing activation and the second standing activation was 2~3h.
10. application of the described in any item de-plugging agents of claim 1-8 in water injection well de-plugging, which is characterized in that answered described
In, the injection allocation pretreating agent first in the water injection well to de-plugging, then injection allocation host agent；
The injection discharge capacity of the pretreating agent and the host agent is 1.5~2m3/h。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710561339.2A CN109233774A (en) | 2017-07-11 | 2017-07-11 | A kind of de-plugging agent and its preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710561339.2A CN109233774A (en) | 2017-07-11 | 2017-07-11 | A kind of de-plugging agent and its preparation method and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109233774A true CN109233774A (en) | 2019-01-18 |
Family
ID=65083939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710561339.2A Pending CN109233774A (en) | 2017-07-11 | 2017-07-11 | A kind of de-plugging agent and its preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109233774A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630217A (en) * | 2019-09-12 | 2019-12-31 | 西安石油大学 | Chlorine dioxide oil-water well production and injection increasing process for tight oil reservoir |
| CN111286317A (en) * | 2020-03-20 | 2020-06-16 | 东北大学 | Polyacrylamide/chromium gel normal-temperature static gel breaker and preparation method thereof |
| CN112852396A (en) * | 2021-01-06 | 2021-05-28 | 中国石油天然气股份有限公司 | Multifunctional blocking remover and preparation method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1435464A (en) * | 2002-11-08 | 2003-08-13 | 郝占元 | Borehole synthetic chlorine dioxide blocking remover and broken down method therewith for oil field |
| CN102250601A (en) * | 2011-05-06 | 2011-11-23 | 河北科技大学 | Composite blocking remover for oil well and application method thereof |
| CN102250602A (en) * | 2011-05-06 | 2011-11-23 | 河北科技大学 | Composite acid blockage removing agent for oil well |
| CN102775975A (en) * | 2012-07-19 | 2012-11-14 | 中国石油天然气股份有限公司 | Blocking remover for reservoir of oil well |
| CN102925128A (en) * | 2012-11-05 | 2013-02-13 | 中国海洋石油总公司 | Compound chemical blocking removing agent of oil field polymer injection well |
| CN103436244A (en) * | 2013-02-28 | 2013-12-11 | 黑龙江昊辰能源开发有限公司 | Composite unblocking agent and method for composite unblocking by using temporary blocking agent and composite unblocking agent |
| CN104388070A (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 | Oil-well unblocking agent and method for preparing same |
| WO2015057664A1 (en) * | 2013-10-14 | 2015-04-23 | Blue Earth Labs Llc | Composition and method including mixed oxidants for treating liquids injected into or received from subterranean formations |
| CN106190075A (en) * | 2015-04-30 | 2016-12-07 | 中国海洋石油总公司 | A kind of combined oxidation de-plugging agent |
| CN106634915A (en) * | 2016-12-30 | 2017-05-10 | 西南石油大学 | Thickened oil well polymer plugging remover |
-
2017
- 2017-07-11 CN CN201710561339.2A patent/CN109233774A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1435464A (en) * | 2002-11-08 | 2003-08-13 | 郝占元 | Borehole synthetic chlorine dioxide blocking remover and broken down method therewith for oil field |
| CN102250601A (en) * | 2011-05-06 | 2011-11-23 | 河北科技大学 | Composite blocking remover for oil well and application method thereof |
| CN102250602A (en) * | 2011-05-06 | 2011-11-23 | 河北科技大学 | Composite acid blockage removing agent for oil well |
| CN102775975A (en) * | 2012-07-19 | 2012-11-14 | 中国石油天然气股份有限公司 | Blocking remover for reservoir of oil well |
| CN102925128A (en) * | 2012-11-05 | 2013-02-13 | 中国海洋石油总公司 | Compound chemical blocking removing agent of oil field polymer injection well |
| CN103436244A (en) * | 2013-02-28 | 2013-12-11 | 黑龙江昊辰能源开发有限公司 | Composite unblocking agent and method for composite unblocking by using temporary blocking agent and composite unblocking agent |
| WO2015057664A1 (en) * | 2013-10-14 | 2015-04-23 | Blue Earth Labs Llc | Composition and method including mixed oxidants for treating liquids injected into or received from subterranean formations |
| CN104388070A (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 | Oil-well unblocking agent and method for preparing same |
| CN106190075A (en) * | 2015-04-30 | 2016-12-07 | 中国海洋石油总公司 | A kind of combined oxidation de-plugging agent |
| CN106634915A (en) * | 2016-12-30 | 2017-05-10 | 西南石油大学 | Thickened oil well polymer plugging remover |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630217A (en) * | 2019-09-12 | 2019-12-31 | 西安石油大学 | Chlorine dioxide oil-water well production and injection increasing process for tight oil reservoir |
| CN110630217B (en) * | 2019-09-12 | 2021-11-23 | 西安石油大学 | Chlorine dioxide oil-water well production and injection increasing process for tight oil reservoir |
| CN111286317A (en) * | 2020-03-20 | 2020-06-16 | 东北大学 | Polyacrylamide/chromium gel normal-temperature static gel breaker and preparation method thereof |
| CN111286317B (en) * | 2020-03-20 | 2021-08-31 | 东北大学 | Polyacrylamide/chromium gel normal-temperature static gel breaker and preparation method thereof |
| CN112852396A (en) * | 2021-01-06 | 2021-05-28 | 中国石油天然气股份有限公司 | Multifunctional blocking remover and preparation method thereof |
| CN112852396B (en) * | 2021-01-06 | 2022-05-10 | 中国石油天然气股份有限公司 | Multifunctional blocking remover and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102604625B (en) | Water-based fracturing fluid used for continental face shale gas fracturing and preparation method thereof | |
| US3411580A (en) | Mud removal method | |
| US7638468B2 (en) | Surfactant based viscoelastic fluids | |
| RU2369736C2 (en) | System of stabilisers and enhancers of functional qualities of aqueous liquids, thickened by viscoelastic surfactants | |
| RU2371572C2 (en) | Compositions on basis of orthoethers and methods of usage at implementation of underground works | |
| US5460226A (en) | Formation fracturing | |
| EP1520085B1 (en) | Compositions and methods for treating a subterranean formation | |
| US4591447A (en) | Aqueous gelling and/or foaming agents for aqueous acids and methods of using the same | |
| US4018689A (en) | Composition and method for reducing the surface tension of aqueous fluids | |
| AU2005252686B2 (en) | Metal-mediated viscosity reduction of fluids gelled with viscoelastic surfactants | |
| RU2347069C2 (en) | Created fracture cleaning process | |
| US20140158355A1 (en) | Crosslinked synthetic polymer gel systems for hydraulic fracturing | |
| CN109233774A (en) | A kind of de-plugging agent and its preparation method and application | |
| CN111534290B (en) | Water-lock releasing agent for reservoir protection drilling fluid and preparation and use methods thereof | |
| WO2007085423A1 (en) | Process for breaking the viscosity of polymer-thickened aqueous systems for mineral oil and natural gas extraction | |
| CN102575146A (en) | Microemulsion to improve shale gas production by controlling water imbibition | |
| JP2020532627A (en) | Enhanced high temperature crosslinked crushing fluid | |
| AT520254A2 (en) | Synthetic fluid loss pill based on polymer | |
| US11753585B2 (en) | Organic acid system with high temperature resistance | |
| CN105482795A (en) | Temporary plugging workover fluid suitable for fractured reservoirs, and preparation method thereof | |
| RU2467163C1 (en) | Method of processing primarily flat horizontal well hole for removal of mud bulk from bottom-hole formation zone | |
| US4426296A (en) | Method of acidizing wells using gelled acids | |
| CN103820089A (en) | Emulsified asphalt selective water plugging agent and preparation method thereof | |
| RU2540767C1 (en) | Method for colmatage removal from bottomhole formation zone upon first opening to restore permeability and porosity of header | |
| CN106854463B (en) | Recyclable fracturing fluid and preparation method thereof and application method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190118 |
|
| RJ01 | Rejection of invention patent application after publication |