CN109517590A - Transformation displacement graphene scion grafting acrylamide polymer oil displacement agent and preparation method - Google Patents
Transformation displacement graphene scion grafting acrylamide polymer oil displacement agent and preparation method Download PDFInfo
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- CN109517590A CN109517590A CN201811372351.XA CN201811372351A CN109517590A CN 109517590 A CN109517590 A CN 109517590A CN 201811372351 A CN201811372351 A CN 201811372351A CN 109517590 A CN109517590 A CN 109517590A
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- graphene
- scion grafting
- acrylamide polymer
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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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/588—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G83/00—Macromolecular compounds not provided for in groups C08G2/00 - C08G81/00
- C08G83/001—Macromolecular compounds containing organic and inorganic sequences, e.g. organic polymers grafted onto silica
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- Oil, Petroleum & Natural Gas (AREA)
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Abstract
The present invention relates to a kind of graphene scion grafting acrylamide polymer oil displacement agent and preparation methods.It has permeable oil-tight characteristic.Its technical solution is: the oil displacement agent in acrylamide/solution property/acrylic ternary copolymer scion grafting graphene by being made.Preparation method is: being first dissolved in acrylamide/solution property/acrylic ternary copolymer in the DFM of 1- (3- dimethylamino-propyl) -3- ethyl-carbodiimide hydrochloride that mass fraction is 5%, amino graphene is added after all dissolutions, 10h is reacted at -12 DEG C ~ -8 DEG C, it is used in NaOH again and pH is 6 ~ 7, be dried in vacuo to obtain graphene scion grafting acrylamide polymer.The oil displacement agent preparation method is simple and easy to do, using transformation displacement new process, has the characteristics that dosage is small, water content is low in displacing fluid.
Description
Technical field
The present invention relates to a kind of transformation displacement graphene scion graftings third that crude oil recovery ratio is improved for oil play oil field
Acrylamide polymer oil-displacing agent and preparation method.
Background technique
Oil field is often used oil displacement agent by displacement process and increases oil well output to improve crude oil recovery ratio.It uses at present
Oil displacement agent mainly have polymer oil-displacing agent (Hu Bozhong edit polymer flooding oil-extraction engineering, petroleum industry publishing house, 2004),
Surfactant flooding agent, alkali drive finish and biological oil displacement agent etc., these oil displacement agents can also be applied in combination, referred to as combination flooding
Finish.For polymer oil-displacing agent, mainly by water injection well elder generation injection of polymer, it is allowed to form " slug ", then again
Water filling forms pressure and pushes " polymer slug " that the mother oil displacement being adsorbed in oil reservoir cell walls is made to get off, and is pushed into oil well always and adopts
Out, which is commonly referred to as displacement.Now the problem is that water content is too high in the displacing fluid that oil well obtains, especially High water cut
Water content is up to 90% or more in oil reservoir displacing fluid.The crude oil of High water cut is handled by series of process such as grease layering, demulsifications again
After obtain output crude oil.Production cost, energy consumption etc. significantly rise, and there are also oil reservoir water to return to stratum after environmental protection treatment is qualified
Or it is discharged into environment.The present invention proposes a kind of transformation displacement process, and cooperates and implement transformation displacement oil displacement agent, to reach oil
The technical tactic that water content significantly tails off in well displacing fluid.
Summary of the invention
It is an object of the invention to: polymer displacement of reservoir oil technique is improved, the water content in oil well displacing fluid is made significantly to tail off, it is special
It proposes a kind of transformation displacement process, and transformation displacement graphene scion grafting acrylamide polymer oil displacement agent and preparation side is provided
Method.
In order to achieve the above object, the invention adopts the following technical scheme: preparing a kind of graphene scion grafting acryloyl first
Amine polymer, the polymer have permeable oil-tight property, before making " polymer slug " by change pressure in displacement process
Water in the liquid of end penetrates into " polymer slug " rear end, to guarantee that water content is reduced in displacing fluid.Graphene scion grafting propylene
Amide polymer constitutes as follows:
Wherein the molar percentage of x is 75-85%, and the molar percentage of y is 5-10%, and the molar percentage of z is 2-10%,For graphene.
The preparation method of graphene scion grafting acrylamide polymer the following steps are included:
15g acrylamide/solution property/acrylic ternary copolymer is first dissolved in 50mL mass
Score be 5% 1- (3- dimethylamino-propyl) -3- ethyl-carbodiimide hydrochloride DFM in, all dissolution after be added 0.25 ~
0.85g amino graphene reacts 10h at -12 DEG C ~ -8 DEG C, then is 6 ~ 7,50 DEG C with pH in NaOH solution and be dried in vacuo
Graphene scion grafting acrylamide polymer.The polymer has permeable oil-resisting characteristic.
The present invention compared with prior art, the beneficial effect is that: graphene scion grafting acrylamide polymer enters oil reservoir
It is capable of forming " polymer slug ", when water filling increases pressure, " polymer slug " front end water oil mixture is by displacement to oil well
Direction flowing.Water just penetrates " polymer in the oil water mixture of " polymer slug " front end after stopping water filling or reducing pressure
Slug " is flowed to water injection well direction.In this way, the liquid water content of last displacement to oil well is seldom by multiple transformation displacement, reach
The purpose of the real displacement of reservoir oil is arrived.In addition, since graphene hexagonal honeycomb lamellar structure toughness itself and plasticity are good, branch
The graphene connect can be changed bending and hydrophobic property in the complex environment of stratum duct, make its polymer slug intensity, toughness and bullet
Property increases substantially, and displacing agent dosage obviously tails off.Transformation displacement overall process is as shown in Fig. 1.
Detailed description of the invention
Fig. 1 transformation displacement process schematic diagram；
In Fig. 1: 1 hydrone；2 polymer slugs；3 oil molecules；4 hydrones penetrate polymer slug；5 water contents reduce
Displacing fluid.
Specific embodiment
Below by embodiment, the present invention is further described.
Embodiment 1
15g acrylamide/solution property/acrylic ternary copolymer is dissolved in 50mL mass point
In DFM of the number for 5% 1- (3- dimethylamino-propyl) -3- ethyl-carbodiimide hydrochloride, 0.51g ammonia all is added after dissolution
Base graphene reacts 10h at -10 DEG C, in NaOH solution and pH be 6 ~ 7, be dried in vacuo to obtain 14.2g graphene scion grafting propylene
Amide polymer.Implementation quality percentage be respectively 50% grease simulation core transformation displacement test the results show that crude oil Produced Liquid
Yield is 87.2%, and water content mass percent is 7.2%.
Reference examples 1
By graphene scion grafting acrylamide polymer implementation quality percentage described in example 1 everybody 50% grease simulation core
Conventional displacement test, the results show that crude oil extraction liquid yield is 88.6%, water content mass percent is 56.8%.
Reference examples 2
By acrylamide/solution property/acrylic ternary copolymer implementation quality described in example 1
Percentage everybody 50% grease simulation core transformation displacement test, the results show that crude oil extraction liquid yield be 84.2%, water content
Mass percent is 57.2%.
Claims (4)
1. a kind of transformation displacement graphene scion grafting acrylamide polymer oil displacement agent and preparation method, it is characterised in that graphene
Scion grafting acrylamide polymer oil displacement agent by amino graphene modified propylene amide/solution property/
Acrylic ternary copolymer obtains.
2. as right 1 requires the graphene scion grafting acrylamide polymer using transformation displacement process.
3. as right 1 requires the graphene scion grafting acrylamide polymer structure as follows:
Wherein the molar percentage of x is 75-85%, and the molar percentage of y is 5-10%, and the molar percentage of z is 2-10%.
4. as right 1 require the graphene scion grafting acrylamide polymer preparation method the following steps are included:
15g acrylamide/solution property/acrylic ternary copolymer is first dissolved in 50mL mass
Score be 5% 1- (3- dimethylamino-propyl) -3- ethyl-carbodiimide hydrochloride DFM in, all dissolution after be added 0.25 ~
0.85g amino graphene reacts 10h at -12 DEG C ~ -8 DEG C, then is 6 ~ 7,50 DEG C with pH in NaOH solution and be dried in vacuo
Graphene scion grafting acrylamide polymer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810526683 | 2018-05-29 | ||
| CN2018105266832 | 2018-05-29 |
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| CN109517590A true CN109517590A (en) | 2019-03-26 |
| CN109517590B CN109517590B (en) | 2020-12-01 |
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| CN201811372351.XA Active CN109517590B (en) | 2018-05-29 | 2018-11-19 | Graphene grafted acrylamide polymer oil displacement agent for pressure swing displacement and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111548466A (en) * | 2020-05-15 | 2020-08-18 | 宁波锋成纳米科技有限公司 | Polymer, preparation method thereof and oil displacement agent |
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| CN111548466A (en) * | 2020-05-15 | 2020-08-18 | 宁波锋成纳米科技有限公司 | Polymer, preparation method thereof and oil displacement agent |
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