CN110157398A - A kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent - Google Patents
A kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent Download PDFInfo
- Publication number
- CN110157398A CN110157398A CN201910428742.7A CN201910428742A CN110157398A CN 110157398 A CN110157398 A CN 110157398A CN 201910428742 A CN201910428742 A CN 201910428742A CN 110157398 A CN110157398 A CN 110157398A
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- Prior art keywords
- injection
- depolymerization
- increasing yield
- agent
- environmental protection
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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
- C09K8/52—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
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- 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
Abstract
The invention discloses a kind of injection well environmental protection viscosity reductions to drop resistance depolymerization increasing yield and injection agent, abbreviation depolymerizing agent (DPA), the increasing yield and injection agent is by mass percentage, it is grouped as by following group: inorganic ammonium salt 10%-40%, inorganic acid 0%-30%, organic acid 5%-35%, bleeding agent 2%-50%, alcohol 2%-35%, aldehyde 5%-35%.Increasing yield and injection agent prepared by the present invention has both depolymerization and solubility property, anaerobic agent, heavy metal free, safety anti-explosive, broken poly-, viscosity reduction drop hinder, are environmentally protective, slit cement can be dissolved, straight joint expands larynx, and anatonosis augmented injection improves oil displacement efficiency, depolymerization anatonosis, the present invention infuses poly layer using the method injection injection well of low discharge capacity pulsed, reduces the danger of Tectonic earthquake, can be used for filling the water, drilling well, complete well, the injection wells depolymerization anatonosis such as pressure break.
Description
Technical field
The present invention relates to waterflood enhanced recovery technical field, more particularly to a kind of injection well environmental protection viscosity reduction drop
Hinder the agent of depolymerization increasing yield and injection.
Background technique
The tertiary oil recovery main method that oil field is carried out at present is polymer flooding, the basic principle is that utilizing polyphosphazene polymer
The high viscosity for closing object, the petroleum at macropore center is displaced.The major advantage of polymer flooding: adjustment injection profile makes height
Seeping channel velocity reduces, and the viscous pressurization of height promotes the oil in macropore to displace, and increases yield.Polymer flooding presently, there are master
Want disadvantage: polymer cannot change wetability, and the absorption oil on macropore wall surface is motionless；The high viscosity of high molecular polymer
The absorption oil in the free oil and micron, nano pore in millimeter duct is blocked, prevent a large amount of petroleum is from being plucked out of；
The high viscosity of high molecular polymer blocks millimeter, micron, nano pore, and water injection rate falls sharply day by day, oil production rate day by day quickly under
Drop, causes oil exploitation to stop production.Polymer plugging is released, it is extremely urgent to increase water injection rate.Polymer is more difficult to degrade or even 100
Year is non-degradable, and it is long-term that polymer is damaged caused by stratum.
Injection well is too many at present, the increasingly rapid drawdown of injection well water injection rate, field output increasingly rapid drawdown.Conventional acidulation, Strong oxdiative
Agent (hydrogen peroxide and chlorine dioxide), microorganism depolymerization etc., cannot all reach ideal industrial significance.Daqing oil field titanium dioxide chlorinolysis
All once there is explosion accident in poly-, Dagang Oilfield hydrogen peroxide depolymerization, and it is larger to commonly use depolymerization mode security risk.
Therefore, in conjunction with the above problem, a kind of environmentally protective, safely and effectively injection well viscosity reduction drop resistance depolymerization volume increase increasing is provided
The problem of injecting is those skilled in the art's urgent need to resolve.
Summary of the invention
In view of this, the present invention provides a kind of injection well environmental protection viscosity reductions to drop resistance depolymerization increasing yield and injection agent, abbreviation depolymerizing agent
(DPA), the increasing yield and injection agent preparation method simple possible, the increasing yield and injection agent safety anti-explosive prepared, broken poly-, viscosity reduction drop resistance,
It is environmentally protective.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of drop resistance depolymerization increasing yield and injection agent of injection well environmental protection viscosity reduction, the increasing yield and injection agent by mass percentage, by
Following group is grouped as: inorganic ammonium salt 10%-40%, inorganic acid 0%-30%, organic acid 5%-35%, bleeding agent 2%-50%,
Alcohol 2%-35%, aldehyde 5%-35%.
Preferably, the inorganic ammonium salt is ammonium fluoride, ammonium acid fluoride, ammonium chloride, ammonium sulfate.
Preferably, the inorganic acid is hydrochloric acid, hydrofluoric acid, sulfuric acid, phosphoric acid.
Preferably, the organic acid is oxalic acid, formic acid, acetic acid, propionic acid.
Preferably, the bleeding agent is fatty alcohol polyoxyethylene ether JFC, the fast T of aerosol-OT salt, alkaline-resisting infiltration
Saturating agent OEP-70, alkali-resistant penetrant AEP, seeping at high temperature agent JFC-M.
Preferably, the alcohol is methanol, ethyl alcohol, n-butanol, isopropanol.
Preferably, the aldehyde is formaldehyde, paraformaldehyde.
A kind of preparation method of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent, the preparation method specifically: one
The preparation method of kind injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent, which is characterized in that the preparation method specifically: choosing
The component for selecting Gao Xieju, highly dissoluble, by inorganic ammonium salt, organic acid, inorganic acid bleeding agent, alcohol, aldehyde mixed solution in it is molten
Solution, setting temperature are 10-90 DEG C and stir evenly that setting temperature is 10-40 DEG C of stirring 4-2h, and temperature is 40-90 DEG C of stirring 1.5h；
Wherein, the injection mode of the increasing yield and injection agent is that low discharge capacity pulsed injects injection well note poly layer.
Preferably, discharge capacity 0.5m is pressed with waterpower pump truck3/min-1.0m3/ min, pulsed injection need the storage of the broken glue of polymer
Layer.
Preferably, the increasing yield and injection agent can be applied to hypertonic and hyper-tight sandstone oil reservoir, hypertonic and super fine and close carbonic acid
Rock salt oil reservoir.
A kind of polymerization of the injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent in drilling well, complete well, pressing crack construction process
Object de-plugging application.
By using above-mentioned preferred embodiment, the beneficial effects of the present invention are: the drop resistance depolymerization volume increase of injection well environmental protection viscosity reduction
Injection agent is made of low molecule (molecular weight is less than 500) substance；Depolymerization and solubility property are had both, anaerobic agent is broken to gather, without a huge sum of money
Belong to, without boron element, safety anti-explosive, broken poly-, viscosity reduction drop hinder, are environmentally protective, can dissolve slit cement, straight joint expands larynx, anatonosis
Augmented injection improves oil displacement efficiency 5%-30%, and augmented injection 20%-400%, depolymerization anatonosis effect is good, and polymer viscosity reduces 90%-
99%, resistance-reducing yield is high, the efficient 80%-100% of depolymerization EFFECTIVE RANGE, the method that the present invention uses low discharge capacity pulsed
It injects injection well and infuses poly layer, injection pressure reduces 10%-70%, reduces the danger of Tectonic earthquake, can be used for filling the water, is drilling well, complete
The injection wells depolymerization anatonosis such as well, pressure break.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment 1:
The embodiment of the present invention 1 discloses a kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent, the technical side of use
Case is as follows:
A kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent, is 13,300,000 polydispersity polymers for working fluid,
The increasing yield and injection agent by mass percentage, is grouped as by following group: 10% ammonium acid fluoride, 12% ammonium sulfate, 3% oxalic acid,
10% phosphoric acid, 8% formic acid, 6%JFC, 6% fast T, 11%AEP, 4% methanol, 30% formaldehyde.
Core flooding permeability improves 230.2%.
Embodiment 2:
The embodiment of the present invention 2 discloses a kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent, the technical side of use
Case is as follows:
A kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent, is 13,900,000 polydispersity polymers for working fluid,
The increasing yield and injection agent by mass percentage, is grouped as by following group: 10% ammonium acid fluoride, 10% ammonium sulfate, 5% oxalic acid,
8% phosphoric acid, 6% formic acid, 6%JFC, 6% fast T, 10%AEP, 2%JFC-M, 5% methanol, 30% formaldehyde, 2% paraformaldehyde.
Core flooding permeability improves 311.5%.
Embodiment 3:
The embodiment of the present invention 3 discloses a kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent, the technical side of use
Case is as follows:
A kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent, is 18,000,000 polydispersity polymers for working fluid,
The increasing yield and injection agent by mass percentage, is grouped as by following group: 12% ammonium acid fluoride, 4% ammonium chloride, 8% ammonium sulfate,
4% oxalic acid, 20% formic acid, 5% acetic acid, 10% phosphoric acid, 10%AEP, 5% methanol, 20% formaldehyde, 2% paraformaldehyde.
This increasing yield and injection agent makes viscosity after the 18000000 polydispersity polymer depolymerization of 3000ppm be less than 2.0mPa.S, drop
Viscous rate is greater than 99.2%, and core flooding permeability improves 218.4%.
Embodiment 4:
The embodiment of the present invention 4 discloses a kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent, the technical side of use
Case is as follows:
A kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent, is salt-resistant polymer micelle (0.1% for working fluid
The oil-containing soil of salt-resistant polymer), the increasing yield and injection agent by mass percentage, is grouped as by following group: 10% ammonium fluoride,
10% ammonium chloride, 5% oxalic acid, 5% formic acid, 18%JFC, 15% fast T, 5% n-butanol, 5% isopropanol, 25% formaldehyde, more than 2%
Polyformaldehyde.
This increasing yield and injection agent makes viscosity after the oil-containing soil depolymerization of 0.1% salt-resistant polymer be less than 1.5m Pa.s.
Embodiment 5:
The embodiment of the present invention 5 discloses a kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent, the technical side of use
Case is as follows:
A kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent is drilled well de-plugging so that used 0.15% hydrolysis poly- third
Acrylamide+0.5%CMC carboxymethyl cellulose, the increasing yield and injection agent by mass percentage, are grouped as by following group: 5% fluorine
Change ammonium, 10% ammonium acid fluoride, 10% ammonium chloride, 5% phosphoric acid, 5% formic acid, 8%JFC, 6% fast T, 4% methanol, 6% ethyl alcohol,
8% n-butanol, 6% isopropanol, 25% formaldehyde, 2% paraformaldehyde.
This increasing yield and injection agent is greater than 0.15% hydrolyzed polyacrylamide+0.5%CMC carboxymethyl cellulose viscosity break ratio
99.3%, core flooding permeability improves 134.1%.
Embodiment 6:
The embodiment of the present invention 6 discloses a kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent, the technical side of use
Case is as follows:
A kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent, for+1.2% weak base of 0.2% polymer of working fluid
Na2CO3+ 0.3% mersolates, the increasing yield and injection agent by mass percentage, are grouped as by following group: 4% hydrogen fluorine
Acid, 10% phosphoric acid, 10% formic acid, 10% acetic acid, 6% propionic acid, 25%JFC, 15% fast T, 10%AEP, 5% methanol, 5% aldehyde.
+ 1.2% weak base Na of 0.2% polymer2CO3Viscosity is less than 1.5mPa.s after+0.3% mersolates depolymerization.
Embodiment 7:
The embodiment of the present invention 7 discloses a kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent, the technical side of use
Case is as follows:
A kind of drop resistance depolymerization increasing yield and injection agent of injection well environmental protection viscosity reduction, for+0.3% soda ash of 6% bentonite of working fluid+
0.5% carboxyl methyl cellulose, the increasing yield and injection agent by mass percentage, are grouped as by following group: 8% ammonium acid fluoride,
8% ammonium chloride, 5% phosphoric acid, 5% acetic acid, 20%JFC, 12% fast T, 6% methanol, 6% ethyl alcohol, 4% n-butanol, 4% isopropyl
Alcohol, 20% formaldehyde, 2% paraformaldehyde.
Viscosity is less than 1.9mPa.s after+0.5% carboxyl methyl cellulose depolymerization of+0.3% soda ash of 6% bentonite.
Injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent DPA can both release the blocking for infusing hypertonic oilfield injection well, increase
Water is filled, anatonosis volume increase can also be in the Oil in Super-low Permeability oil field anatonosis volume increase that not polymer injection recovers the oil.
It is lasting that injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent DPA demand is big, market is big, required time has
Property.Injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent DPA has wide applicability, can in high volume organize to produce, full
The demand of a large amount of injection wells in sufficient Daqing oil field, Shengli Oil Field, Dagang Oilfield etc. oil field, the drop resistance depolymerization of injection well environmental protection viscosity reduction increase
Producing injection agent DPA influences extremely great, economic benefit, social benefit to the energy strategy of country, energy demand, the economy of energy
It is all difficult to the appraisal.Injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent DPA has wide applicability, can high-volume
Tissue production.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (9)
1. a kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent, which is characterized in that quality hundred is pressed in the increasing yield and injection agent
Divide than meter, is grouped as by following group: inorganic ammonium salt 10%-40%, inorganic acid 0%-30%, organic acid 5%-35%, bleeding agent
2%-50%, alcohol 2%-35%, aldehyde 5%-35%.
2. a kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent according to claim 1, which is characterized in that described
Inorganic ammonium salt is ammonium fluoride, ammonium acid fluoride, ammonium chloride, ammonium sulfate.
3. a kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent according to claim 1, which is characterized in that described
Inorganic acid is hydrochloric acid, hydrofluoric acid, sulfuric acid, phosphoric acid.
4. a kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent according to claim 1, which is characterized in that described
Organic acid is oxalic acid, formic acid, acetic acid, propionic acid.
5. a kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent according to claim 1, which is characterized in that described
Bleeding agent is fatty alcohol polyoxyethylene ether JFC, the fast T of aerosol-OT salt, alkali-resistant penetrant OEP-70, alkaline-resisting infiltration
Agent AEP, seeping at high temperature agent JFC-M.
6. a kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent according to claim 1, which is characterized in that described
Alcohol is methanol, ethyl alcohol, n-butanol, isopropanol.
7. a kind of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent according to claim 1, which is characterized in that described
Aldehyde is formaldehyde, paraformaldehyde.
8. a kind of preparation method of injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent, which is characterized in that the preparation method
Specifically: the component for selecting high depolymerization, highly dissoluble, by inorganic ammonium salt, organic acid, inorganic acid bleeding agent, alcohol, aldehyde mixing
It is dissolved in solution, setting temperature is 10-90 DEG C and stirs evenly, and setting temperature is 10-40 DEG C of stirring 4-2h, and temperature is 40-90 DEG C
Stir 1.5h；
Wherein, the injection mode of the increasing yield and injection agent is that low discharge capacity pulsed injects injection well note poly layer.
9. a kind of any injection well environmental protection viscosity reduction drop resistance depolymerization increasing yield and injection agent of claim 1-8 is in drilling well, complete well, pressure
Split the polymer de-plugging application in work progress.
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Effective date of registration: 20201224 Address after: Floor 16, building 3, No.21, Jiuxianqiao Road, Chaoyang District, Beijing Applicant after: CHINA UNITED COALBED METHANE Co.,Ltd. Applicant after: Chengdu University of Technology Applicant after: CHENGDU ELM TECHNOLOGY DEVELOPMENT Co.,Ltd. Address before: 610051 Building 2, phase I, Shili caiyunjian, Cuijia village, shengdeng Township, Chenghua District, Chengdu City, Sichuan Province Applicant before: CHENGDU ELM TECHNOLOGY DEVELOPMENT Co.,Ltd. Applicant before: Renshou Branch of Chengdu Energy Materials Technology Development Co.,Ltd. Applicant before: Renshousheng Material Technology Co.,Ltd. |
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Application publication date: 20190823 |
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