CN106318356A - Water plugging emulsion and preparation method thereof - Google Patents
Water plugging emulsion and preparation method thereof Download PDFInfo
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- CN106318356A CN106318356A CN201510398915.7A CN201510398915A CN106318356A CN 106318356 A CN106318356 A CN 106318356A CN 201510398915 A CN201510398915 A CN 201510398915A CN 106318356 A CN106318356 A CN 106318356A
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- emulsion
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- water blockoff
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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
Abstract
The invention discloses a water plugging emulsion and a preparation method thereof. The water plugging emulsion contains an oil phase, an emulsifier, a dispersing agent, a stabilizer and a stability enhancer. The preparation method comprises the following steps: dissolving and dispersing the components in water under stirring conditions, heating, slowly pouring the 60-110-DEG C oil phase into a water phase, and completely emulsifying by high-speed stirring. After being injected into the stratum, the water plugging emulsion has high stability, can effectively plug the water layer, does not have the plugging action on crude oil, and is capable of lowering the water content in the production well output liquid and enhancing the crude oil yield.
Description
Technical field
The present invention relates to field of oil development, say further, relate in a kind of oilfield development process for
Emulsion of oilwell water shutoff and preparation method thereof.
Background technology
At present both at home and abroad the oil field overwhelming majority uses waterflooding extraction, and the middle and late stage in exploitation injects water can be along
Crack, high permeable strip etc. enter producing well so that production fluid aqueous too high even producing well water logging, no
Only considerably increase and process the expense of water and reduce crude output.
Water blockoff is the measure of a kind of simple and effective raising crude output, currently mainly has Mechanical Method and chemistry
Method.Mechanical Method water blockoff is only suitable for water exit and clearly and there is certain thickness interlayer between water layer and oil reservoir
Oil well, and require that oil well cementing quality to be got well.Wider range that chemical method water blockoff adapts to, water shutoff agent kind
Class is various, such as polymer gel class, inorganic gel class, particulate species, foam class etc., wherein oil-in-water type
Type of latex type water shutoff agent is a kind of typical selective water shutoff agent, has the feature of the not stifled oil of water blockoff.
Patent CN1644647A discloses one " compound method of modified paraffin selective water shutoff agent ", first
Before this paraffin, oleic acid, stearic acid, ammonia, water were made O/w emulsion, then by modified paraffin breast
Liquid and Petropols, paper pulp, water are mixed and made into water shutoff agent, this blocking agent in oil reservoir, the paraffin crystallized out
Emulsified being dispersed in crude oil, the modified paraffin crystal aggregation that to oil layer blocking, will not enter aquaporin becomes
Bigger crystalline solid, mutually bonds, and blowhole is played ponding.Patent CN101935520B
Disclose one " Novel emulsion organic resin selective plugging agent ", by polyacrylamide, liquid organic resin (stone
Oleoresin), surfactant (OP-100) and firming agent (methyl ethyl ketone peroxide) composition.Zhao Yongfeng
Etc. describe the preparation of a kind of Water in Water Shutoff in Oil Field reversed-phase emulsion and performance (Speciality Petrochemicals is in progress, 2011,
The first phase), its material used is diesel oil, emulsifying agent, nano silicon.
Summary of the invention
In order to improve stability and the water plugging property of water shutoff agent, the invention provides a kind of for oilwell water shutoff
Emulsion and preparation method thereof.After this water shutoff agent injects stratum, not only good stability, and can effectively seal
Water-blocking layer, does not has plugging action, thus reduces the moisture content of fluid produced by oil production well, improves crude oil crude oil
Yield.
A kind of water blockoff emulsion of the present invention is achieved in that
A kind of water blockoff emulsion, described water blockoff emulsion contains: oil phase, emulsifying agent, dispersant, stable
Agent and water；
Described oil phase is one or more in dewatered oil, oil plant residual oil, Colophonium；Described emulsifying agent
For oleic acid, it is also possible to include one or more in following material: enuatrol, alkylbenzenesulfonate, dehydration
Span；Described dispersant agent is one or both in sodium humate, sodium lignin sulfonate；
Described stabilizer is one or more in sodium hydroxide, sodium carbonate, sodium bicarbonate.
In the specific implementation, based on gross mass 100%, described water blockoff emulsion contains: oil phase 20%-60%,
Emulsifying agent 0.05%-1%, dispersant are 0.05%-3%, stabilizer 0.005%-0.8%；Preferably content
For oil phase 40%-50%, emulsifying agent 0.1%-0.3%, dispersant 0.5%-1%, stabilizer 0.01%-0.5%.
In the specific implementation, described oil phase is oil plant residual oil, and described emulsifying agent is oleic acid and benzene sulfonamide
The mixture of acid sodium 3:1 in mass ratio, described dispersant is sodium humate with sodium lignin sulfonate by quality
The ratio mixture of 2:1, described stabilizer is the mixture of sodium hydroxide and sodium bicarbonate 10:1 in mass ratio.
In the specific implementation, described water blockoff emulsion is possibly together with stabilizing reinforcer, and described stabilizing reinforcer is
Polymeric sodium metaphosphate.；Based on gross mass 100%, in described water blockoff emulsion, containing of described stabilizing reinforcer
Amount is for less than or equal to 0.5%.
In the specific implementation, preferred described water blockoff emulsion, based on gross mass 100%, oil phase is 50%,
Emulsifying agent is 0.25%, dispersant is 0.8%, stabilizer is 0.35%, stabilizing reinforcer is 0.1%,
Surplus is water.
The preparation method of a kind of water blockoff emulsion of the present invention is achieved in that
Under agitation, described oleic acid is dissolved in described oil phase, by the institute in addition to described oleic acid
Stating emulsifying agent, and described dispersant, described stabilizer, described stabilizing reinforcer, dissolving is dispersed in water,
Obtain aqueous phase；Then by described heated aqueous to 60-90 DEG C (preferably 70 DEG C), temperature is 60-110 DEG C
The described oil phase of (preferably 90 DEG C) is poured slowly in described aqueous phase, stirs at 1000r/min-2000r/min
Mix down to complete emulsifying；Then under the stirring of 200r/min-500r/min, it is cooled to room temperature, obtains described
Water blockoff emulsion.
The water blockoff emulsion that the present invention prepares at room temperature is placed 30 days, slightly settles, and does not occurs cementing
Phenomenon, rocks the reagent bottle equipped with blocking agent gently, and emulsion becomes uniform, flowable, not the phenomenon such as caking.
Compared with prior art, water shutoff agent oil phase of the present invention, water, emulsifying agent, dispersant, steady
Determine agent, stabilizing reinforcer is prepared under conditions of heating, stirring, is characterized in that numerous emulsifiers is assisted
Higher with effect emulsifying capacity, introduce dispersant and can strengthen emulsion intercalation method, that adds is steady simultaneously
Determining reinforcing agent and can improve emulsion intercalation method further with oil phase component phase separation, the blocking agent of formation is at oil reservoir
Middle oil phase is soluble in crude oil, meets oil and does not blocks up；Breakdown of emulsion when running into aqueous phase, oil phase separates out blocking duct.
During construction, oil well is injected in emulsion dilution, after this water blockoff injects stratum by emulsion, not only good stability,
And can effectively block water layer, crude oil is not had plugging action, thus reduces the aqueous of fluid produced by oil production well
Rate, raising crude output.
Detailed description of the invention
It is described in further detail technical scheme, protection scope of the present invention not office below in conjunction with embodiment
It is limited to following detailed description of the invention.
Embodiment 1:
This example is used for preparing oilwell water shutoff emulsion.
Oil phase is oil plant residual oil, and emulsifying agent is the mixing of oleic acid and sodium alkyl benzene sulfonate 3:1 in mass ratio
Thing, dispersant is the mixture of sodium humate and sodium lignin sulfonate 2:1 in mass ratio, and stabilizer is hydrogen
Sodium oxide and the mixture of sodium bicarbonate 10:1 in mass ratio, stabilizing reinforcer is Polymeric sodium metaphosphate..
Being sequentially added into water 53g in 250mL reaction vessel under agitation, sodium alkyl benzene sulfonate is pressed
0.125g, dispersant 1g, stabilizer 0.5g, stirring and dissolving, be uniformly dispersed, by heated aqueous to 80 DEG C；
0.375g oleic acid is dissolved in 45g oil phase, the most under high velocity agitation by oil phase that temperature is 90 DEG C
Being poured slowly in aqueous phase, stirring, to complete emulsifying, i.e. obtains water blockoff emulsion.
Placing 1 month, agitated emulsion recovers uniform state again.Inject 0.3PV in rock core, aqueous phase
Permeability reduction 80%.
Embodiment 2:
This example is used for preparing oilwell water shutoff emulsion.
Oil phase is oil plant residual oil, and emulsifying agent is the mixing of oleic acid and sodium alkyl benzene sulfonate 3:1 in mass ratio
Thing, dispersant is the mixture of sodium humate and sodium lignin sulfonate 2:1 in mass ratio, and stabilizer is hydrogen
Sodium oxide and the mixture of sodium bicarbonate 10:1 in mass ratio, stabilizing reinforcer is Polymeric sodium metaphosphate..
Water 50.4g, sodium alkyl benzene sulfonate it is sequentially added under agitation in 250mL reaction vessel
0.025g, dispersant 0.8g, stabilizer 0.6, stabilizing reinforcer 0.1g, stirring and dissolving, be uniformly dispersed,
By heated aqueous to 80 DEG C；0.075g oleic acid is dissolved in 48g oil phase, the most under high velocity agitation
The oil phase that temperature is 90 DEG C is poured slowly in aqueous phase, and stirring, to complete emulsifying, i.e. obtains water blockoff emulsion.
Placing 1 month, agitated emulsion recovers uniform state again.Inject 0.3PV in rock core, aqueous phase
Permeability reduction 80%.
Claims (8)
1. a water blockoff emulsion, it is characterised in that described water blockoff emulsion contains: oil phase, emulsifying
Agent, dispersant, stabilizer and water；
Described oil phase is one or more in dewatered oil, oil plant residual oil, Colophonium；Described emulsifying agent
For oleic acid, optionally include one or more in following material: enuatrol, alkylbenzenesulfonate, dehydration
Span；Described dispersant agent is one or both in sodium humate, sodium lignin sulfonate；
Described stabilizer is one or more in sodium hydroxide, sodium carbonate, sodium bicarbonate.
Water blockoff emulsion the most according to claim 1, it is characterised in that:
Based on gross mass 100%, described water blockoff emulsion contains: oil phase 20-60 weight %, emulsifying agent
0.05-1 weight %, dispersant 0.05-3 weight %, stabilizer 0.005-0.8 weight %.
Water blockoff emulsion the most according to claim 2, it is characterised in that:
Based on gross mass 100%, described water blockoff emulsion contains: oil phase 40-50 weight %, emulsifying agent
0.1-0.3 weight %, dispersant 0.5-1 weight %, stabilizer 0.01-0.5 weight %；
Described oil phase is oil plant residual oil, and described emulsifying agent is oleic acid with sodium alkyl benzene sulfonate in mass ratio
The mixture of 3:1, described dispersant is the mixing of sodium humate and sodium lignin sulfonate 2:1 in mass ratio
Thing, described stabilizer is the mixture of sodium hydroxide and sodium bicarbonate 10:1 in mass ratio.
Water blockoff emulsion the most according to claim 3, it is characterised in that:
Described water blockoff emulsion is possibly together with stabilizing reinforcer, and described stabilizing reinforcer is Polymeric sodium metaphosphate..
Water blockoff emulsion the most according to claim 4, it is characterised in that:
Based on gross mass 100%, in described water blockoff emulsion, the content of described stabilizing reinforcer is:
Less than or equal to 0.5 weight %.
Water blockoff emulsion the most according to claim 5, it is characterised in that:
Based on gross mass 100%, consisting of of described water blockoff emulsion: oil phase 50 weight %, emulsifying agent
0.25 weight %, dispersant 0.8 weight %, stabilizer 0.35 weight %, stabilizing reinforcer 0.1 weight %,
Surplus is water.
7. according to the preparation method of the water blockoff emulsion one of claim 1～6 Suo Shu, it is characterised in that
The method comprises the following steps:
Under agitation, described oleic acid is dissolved in described oil phase, by the institute in addition to described oleic acid
Stating emulsifying agent, and described dispersant, described stabilizer, described stabilizing reinforcer, dissolving is dispersed in water,
Obtain aqueous phase；Then by described heated aqueous to 60-90 DEG C, by the described oil phase that temperature is 60-110 DEG C
It is poured slowly in described aqueous phase, stirs down to complete emulsifying at 1000r/min-2000r/min；Then exist
It is cooled to room temperature under the stirring of 200r/min-500r/min, obtains described water blockoff emulsion.
Preparation method the most according to claim 7, it is characterised in that:
By described heated aqueous to 65-70 DEG C, then the described oil phase that temperature is 90-100 DEG C is slowly fallen
Entering in described aqueous phase, stirring is to complete emulsifying；The most under agitation it is cooled to room temperature, obtains described water blockoff
Use emulsion.
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| CN201510398915.7A CN106318356B (en) | 2015-07-08 | 2015-07-08 | A kind of water blockoff lotion and preparation method thereof |
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| CN201510398915.7A CN106318356B (en) | 2015-07-08 | 2015-07-08 | A kind of water blockoff lotion and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110713824A (en) * | 2019-09-24 | 2020-01-21 | 大港油田集团有限责任公司 | Anti-adsorption composite oil displacement system and preparation method thereof |
| CN111334263A (en) * | 2018-12-18 | 2020-06-26 | 中国石油天然气股份有限公司 | Self-selective plugging agent based on aging oil and water plugging method |
| CN112210357A (en) * | 2020-10-23 | 2021-01-12 | 中国石油大学(华东) | W/O/W type multiple emulsion water shutoff system and preparation method thereof |
| CN113336884A (en) * | 2021-06-15 | 2021-09-03 | 长江大学 | Oil-water interface suspension water-control emulsion, and preparation method and application thereof |
| CN114479796A (en) * | 2020-11-12 | 2022-05-13 | 中国石油化工股份有限公司 | Low-cost vegetable oil gel system and preparation method thereof |
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| CN102876305A (en) * | 2011-07-14 | 2013-01-16 | 中国石油化工股份有限公司 | Oil well water shutoff agent and oil well water shutoff method |
| CN102952526A (en) * | 2011-08-26 | 2013-03-06 | 中国石油化工股份有限公司 | High-softening point emulsified asphalt water-based drilling fluid additive and preparation method thereof |
| CN103897678A (en) * | 2012-12-27 | 2014-07-02 | 中国石油化工股份有限公司 | Water-in-oil drilling fluid and preparation method thereof |
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2015
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Patent Citations (3)
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| CN102876305A (en) * | 2011-07-14 | 2013-01-16 | 中国石油化工股份有限公司 | Oil well water shutoff agent and oil well water shutoff method |
| CN102952526A (en) * | 2011-08-26 | 2013-03-06 | 中国石油化工股份有限公司 | High-softening point emulsified asphalt water-based drilling fluid additive and preparation method thereof |
| CN103897678A (en) * | 2012-12-27 | 2014-07-02 | 中国石油化工股份有限公司 | Water-in-oil drilling fluid and preparation method thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111334263A (en) * | 2018-12-18 | 2020-06-26 | 中国石油天然气股份有限公司 | Self-selective plugging agent based on aging oil and water plugging method |
| CN111334263B (en) * | 2018-12-18 | 2022-10-04 | 中国石油天然气股份有限公司 | Self-selective plugging agent based on aging oil and water plugging method |
| CN110713824A (en) * | 2019-09-24 | 2020-01-21 | 大港油田集团有限责任公司 | Anti-adsorption composite oil displacement system and preparation method thereof |
| CN110713824B (en) * | 2019-09-24 | 2021-09-07 | 大港油田集团有限责任公司 | Anti-adsorption composite oil displacement system and preparation method thereof |
| CN112210357A (en) * | 2020-10-23 | 2021-01-12 | 中国石油大学(华东) | W/O/W type multiple emulsion water shutoff system and preparation method thereof |
| CN112210357B (en) * | 2020-10-23 | 2023-03-03 | 中国石油大学(华东) | W/O/W type multiple emulsion water shutoff system and preparation method thereof |
| CN114479796A (en) * | 2020-11-12 | 2022-05-13 | 中国石油化工股份有限公司 | Low-cost vegetable oil gel system and preparation method thereof |
| CN113336884A (en) * | 2021-06-15 | 2021-09-03 | 长江大学 | Oil-water interface suspension water-control emulsion, and preparation method and application thereof |
| CN113336884B (en) * | 2021-06-15 | 2023-01-10 | 长江大学 | Oil-water interface suspension water-control emulsion, and preparation method and application thereof |
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| CN106318356B (en) | 2019-05-07 |
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