CN104845604A - Oil well water plugging micro-emulsion composition and preparation method thereof - Google Patents
Oil well water plugging micro-emulsion composition and preparation method thereof Download PDFInfo
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- CN104845604A CN104845604A CN201510207788.8A CN201510207788A CN104845604A CN 104845604 A CN104845604 A CN 104845604A CN 201510207788 A CN201510207788 A CN 201510207788A CN 104845604 A CN104845604 A CN 104845604A
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- water
- plugging
- blocking agent
- acrylamide
- microemulsion
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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
- C09K8/5083—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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/58—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/36—Amides or imides
- C08F222/38—Amides
- C08F222/385—Monomers containing two or more (meth)acrylamide groups, e.g. N,N'-methylenebisacrylamide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/58—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine
- C08F220/585—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine and containing other heteroatoms, e.g. 2-acrylamido-2-methylpropane sulfonic acid [AMPS]
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- Polymers & Plastics (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The invention relates to a micro-emulsion plugging agent. A preparation method of the micro-emulsion plugging agent includes the steps: adding methylene diacrylamide into water, stirring water and heating the water to reach the temperature of 40-60 DEG C; adding 2-acrylamido-2-methyl propane sulfonic acid aluminum into the water and uniformly mixing the 2-acrylamido-2-methyl propane sulfonic acid aluminum with water; adding an emulsifying agent into mixture; stirring the mixture until a system is uniform; adding stabilizers into the mixture; adjusting a pH (potential of hydrogen) value to 6-7 to obtain the micro-emulsion plugging agent. The oil well water plugging composite plugging agent is applicable to an oil well with the formation temperature of 35-80 DEG C, high in water plugging rate, low in oil plugging rate, strong in formation rock surface binding force, fine in selectivity and long in water plugging validity period, the flowing resistance of the water can be greatly increased (the plugging rate is higher than 90%), breakthrough pressure reaches more than 18Mpa, and the water is plugged while oil is not plugged.
Description
Technical field
The present invention relates to a kind of oilwell water shutoff microemulsion composition and preparation method thereof.
Background technology
China's chemical water shutoff in oilfield technology is applied at the scene from the 1950's, so far existing more than 50 year history.Use grout water blockoff at first, after developed oil based cement, milk of lime, resin, active viscous crude etc., the sixties is based on resin, the seventies, water-soluble polymers and frozen glue thereof start in field use, from then on, Water in Water Shutoff in Oil Field technology enters a new developmental stage, blocking agent kind increases sharply, and process well increases, and economic benefit also significantly improves.China oil field generally adopts waterflooding mode, and formation heterogeneity is serious, and reservoir geology is complicated, and later stage rate of water cut increase under development is accelerated, and current oil well production is on average moisture reaches more than 80%, and some maturing fields of eastern region are moisture reaches more than 90%.Therefore, the workload of water plugging and profile controlling increases year by year, and work difficulty increases, and increases oily potentiality and reduces.
Water blockoff controls water-oil ratio or water production control exactly, its essence is and changes water flow characteristics in the earth formation, namely changes water Percolation Law in the earth formation.Water-blocking operation, according to the difference of construction object, is divided into oil well (recovery well) water blockoff and well (Injection Well) profile control two class.Its objective is the cementing technology situation remedying oil well and the rate of permeation (adjustment flow profile) reducing Water Flooding Layer, improve the recovery ratio of oil reservoir.Current water plugging profile control agent development both domestic and external is very fast, and kind is more, can be divided into non-selective blocking agent and the large class of selective water-plugging two by its performance and effect.Non-selective blocking agent refers to that blocking agent can the chemical agent of simultaneously reservoir plugging and water layer in oil well.Selective water shutoff agent refers to that blocking agent only works with water, and does not work with oil, therefore only results in blockage at water layer and affect very micro-on oil reservoir.
China major part oil field be in the High water cut productive life, many oil reservoirs by water logging, or after long-term injecting water pore texture great changes will take place, nonuniformity is more serious.These stratum need to carry out heavy dose of multistage plug deep process plug agent amount greatly, only have cheap blocking agent just to have use value.
Summary of the invention
The object of the invention is the oilwell water shutoff microemulsion blocking agent providing a kind of selectivity good and with low cost.
Present invention also offers the method for simple, the easy to operate preparation of a kind of technique above-mentioned oilwell water shutoff microemulsion blocking agent.
Implementation procedure of the present invention is as follows:
A kind of oilwell water shutoff microemulsion blocking agent, by mass percent be 1 ~ 20% methylene diacrylamide, 2 ~ 25% 2-acrylamide-2-methylpro panesulfonic acid aluminium, the emulsifying agent of 0.1 ~ 3%, the stablizer of 0.1 ~ 2% and 50 ~ 96.8% water form.Described emulsifying agent is polyoxyethylene nonylphenol ether.Described stablizer is glycol amine.
The preparation method of described 2-acrylamide-2-methylpro panesulfonic acid aluminium is: be dissolved in dimethyl formamide by 2-acrylamide-2-methylpro panesulfonic acid; add the aluminium hydroxide of metering; back flow reaction under nitrogen protection, recycling design, obtains 2-acrylamide-2-methylpro panesulfonic acid aluminium solid.
The preparation method of oilwell water shutoff microemulsion blocking agent of the present invention: methylene diacrylamide is added to the water, stir and be heated to 40 ~ 60 DEG C, add 2-acrylamide-2-methylpro panesulfonic acid aluminium again to mix, emulsifier for mixing is added in mixture, until system is homogeneous, add stablizer again, adjust ph to 6 ~ 7.
It is oil well between 35 ~ 80 DEG C that oilwell water shutoff microemulsion blocking agent of the present invention is applicable to formation temperature.It is high to the plugging rate of water, low to the plugging rate of oil, strong with formation rock surface bonding power, compared with existing plugging agent and technology, there is good selectivity and longer water blockoff validity period, greatly can increase the resistance to flow (plugging rate is greater than 90%) of water, breakthrough pressure reaches more than 18Mpa, reaches the object of the not stifled oil of water blockoff.Therefore, product of the present invention effectively can reduce injection water and charge into oil well along most permeable zone, and do not affect fuel-displaced duct, raw materials cost is low, applied widely, and water blockoff validity period is long, can significantly improve oil recovery factor.
Embodiment
Embodiment is only and illustrates the present invention, and can not be used for limiting to protection scope of the present invention.
2-acrylamide-2-methylpro panesulfonic acid aluminium of the present invention can take following preparation method: 100 parts of 2-acrylamide-2-methylpro panesulfonic acids are added 150 parts of dimethyl formamides; add 40 ~ 60 parts, aluminium hydroxide again; under nitrogen protection; be warming up to the reflux temperature of dimethyl formamide; take the water that reaction generates out of; react 3 ~ 6 hours, recycling design, obtain 2-acrylamide-2-methylpro panesulfonic acid aluminium solid.
Embodiment 1
50 parts of methylene diacrylamides are added in 770 parts of water, stir and be heated to 50 DEG C, add 150 parts of 2-acrylamide-2-methylpro panesulfonic acid aluminium again and mix, emulsifying agent 20 parts stirring is added in mixture, until system is homogeneous, add stablizer 10 parts again, namely adjust ph to 6.8 obtains emulsification blocking agent of the present invention.
Embodiment 2
100 parts of methylene diacrylamides are added in 665 parts of water, stir and be heated to 55 DEG C, add 200 parts of 2-acrylamide-2-methylpro panesulfonic acid aluminium again and mix, emulsifying agent 20 parts stirring is added in mixture, until system is homogeneous, add stablizer 15 parts again, namely adjust ph to 6.6 obtains emulsification blocking agent of the present invention.
Embodiment 3
150 parts of methylene diacrylamides are added in 625 parts of water, stir and be heated to 50 DEG C, add 200 parts of 2-acrylamide-2-methylpro panesulfonic acid aluminium again and mix, emulsifying agent 10 parts stirring is added in mixture, until system is homogeneous, add stablizer 15 parts again, namely adjust ph to 6.7 obtains emulsification blocking agent of the present invention.
Embodiment 4
160 parts of methylene diacrylamides are added in 585 parts of water, stir and be heated to 50 DEG C, add 220 parts of 2-acrylamide-2-methylpro panesulfonic acid aluminium again and mix, emulsifying agent 25 parts stirring is added in mixture, until system is homogeneous, add stablizer 10 parts again, namely adjust ph to 6.8 obtains emulsification blocking agent of the present invention.
Embodiment 5
What breakthrough pressure characterized is that blocking agent drives peak pressure when making breakthroughs at unit length Water in Porous Medium, has reacted blocking agent in porous medium and, to the shut-off capacity of aqueous phase fluid, can reflect the power of blocking agent preferably, adopt single tube model in experiment.First load the sand grains with particle diameter at 18cm × 2.5cm fill out sand tube, compacting as far as possible, by rock core vacuumizing, saturation water, then injects the microemulsified blocking agent of identical liquid measure in forward rock core, putting it into temperature is in the water-bath of 70 DEG C; Finally from water-bath, take out fill out sand tube, load rock core flowing experiment driving device, make displacing fluid reverse displacement with water, the peak pressure (being designated as Pmax) when test fill out sand tube makes breakthroughs, calculates breakthrough pressure gradient.
In formula,
p maxthe peak pressure that-water drive makes breakthroughs, MPa;
l-test core length, m;
p m-breakthrough pressure gradient, MPam
-1.
Embodiment 6
Added in 625 parts of water by 350 parts of methylene diacrylamides, stir and be heated to 50 DEG C, add emulsifying agent 10 parts stirring in mixture, until system is homogeneous, then add stablizer 15 parts, namely adjust ph to 6.7 obtains comparison example emulsification blocking agent.
Sample obtained by above-mentioned example is carried out performance test according to the method described above, and experimental result sees the following form.
Shown by upper table fill out sand tube simulated experiment result, the sealing ratiod of fill out sand tube simulation shutoff experiment is all more than 90%, and breakthrough pressure gradient is greater than 18MPam
-1.
Claims (5)
1. an oilwell water shutoff microemulsion blocking agent, is characterized in that: by mass percent be 1 ~ 20% methylene diacrylamide, 2 ~ 25% 2-acrylamide-2-methylpro panesulfonic acid aluminium, the emulsifying agent of 0.1 ~ 3%, the stablizer of 0.1 ~ 2% and 50 ~ 96.8% water form.
2. oilwell water shutoff microemulsion blocking agent according to claim 1, is characterized in that: described emulsifying agent is polyoxyethylene nonylphenol ether.
3. oilwell water shutoff microemulsion blocking agent according to claim 1, is characterized in that: described stablizer is glycol amine.
4. oilwell water shutoff microemulsion blocking agent according to claim 1; it is characterized in that the preparation method of described 2-acrylamide-2-methylpro panesulfonic acid aluminium is: be dissolved in dimethyl formamide by 2-acrylamide-2-methylpro panesulfonic acid; add the aluminium hydroxide of metering; back flow reaction under nitrogen protection; recycling design, obtains 2-acrylamide-2-methylpro panesulfonic acid aluminium solid.
5. the preparation method of oilwell water shutoff microemulsion blocking agent according to claim 1, it is characterized in that: methylene diacrylamide is added to the water, stir and be heated to 40 ~ 60 DEG C, add 2-acrylamide-2-methylpro panesulfonic acid aluminium again to mix, emulsifier for mixing is added in mixture, until system is homogeneous, then add stablizer, adjust ph to 6 ~ 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510207788.8A CN104845604A (en) | 2015-04-29 | 2015-04-29 | Oil well water plugging micro-emulsion composition and preparation method thereof |
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| CN201510207788.8A CN104845604A (en) | 2015-04-29 | 2015-04-29 | Oil well water plugging micro-emulsion composition and preparation method thereof |
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| CN104845604A true CN104845604A (en) | 2015-08-19 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102911647A (en) * | 2012-10-30 | 2013-02-06 | 中国石油化工股份有限公司 | Temporary plugging agent for drilling fluid and preparation method of temporary plugging agent |
| CN103216211A (en) * | 2012-01-18 | 2013-07-24 | 中国石油天然气股份有限公司 | Profile control method for fractured reservoir |
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2015
- 2015-04-29 CN CN201510207788.8A patent/CN104845604A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216211A (en) * | 2012-01-18 | 2013-07-24 | 中国石油天然气股份有限公司 | Profile control method for fractured reservoir |
| CN102911647A (en) * | 2012-10-30 | 2013-02-06 | 中国石油化工股份有限公司 | Temporary plugging agent for drilling fluid and preparation method of temporary plugging agent |
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Application publication date: 20150819 |
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