CN106967196A - A kind of high temperature resistant PAMC inhibitor and its preparation method and application - Google Patents
A kind of high temperature resistant PAMC inhibitor and its preparation method and application Download PDFInfo
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- CN106967196A CN106967196A CN201710108221.4A CN201710108221A CN106967196A CN 106967196 A CN106967196 A CN 106967196A CN 201710108221 A CN201710108221 A CN 201710108221A CN 106967196 A CN106967196 A CN 106967196A
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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
- C08F220/56—Acrylamide; Methacrylamide
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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
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
Abstract
The invention belongs to the inhibitor technical field of water-base drilling fluid, the present invention relates to a kind of high temperature resistant PAMC inhibitor and its preparation method and application, the inhibitor is formed by acrylamide, cationic monomer, hydrophobic monomer copolymerization, and the application process of the inhibitor is：At normal temperatures, a certain amount of high temperature resistant PAMC inhibitor is added to the water abundant prehydration, it is then uniform with drilling fluid mixed.The present invention has advantages below compared with prior art：Because the PAMC inhibitor molecules amount is low, and containing resistant to elevated temperatures hydrophobic structure unit, therefore the contradiction between existing Polymeric quaternary ammonium salts inhibitor molecules amount and drilling fluid rheology can not only be solved, and at high temperature（100 DEG C of ＞）With excellent inhibition.
Description
Technical field
The invention belongs to the inhibitor technical field of water-base drilling fluid, the present invention relates to a kind of high temperature resistant cation polypropylene
Amide inhibitors and its preparation method and application, relate in particular to a kind of drilling fluid high temperature resistant, low molecule water insoluble hydrophobic
PAMC shale control agent and its preparation method and application.
Background technology
Inhibitor is the indispensable part of water-base drilling fluid, and its main function is to prevent shale hydration from expanding,
Reduce the probability of happening of the complex situations such as borehole well instability, bit freezing in drilling process.Cationic inhibitor be research with application compared with
For one of extensive water-base drilling fluid inhibitor.This, which is primarily due to cationic inhibitor, to be sent out with electronegative clay particle
Raw charge neutrality effect, sets up rapidly hydrophobic barrier on clay particle surface, more fast and effeciently hydrone can be prevented to penetrate into
Enter between clay particle crystal layer, play the effect for suppressing shale hydration expansion.
At present, cationic inhibitor mainly has two classes：One class is small molecule quaternary ammonium salt（Abbreviation small cation）, it is another kind of
It is Polymeric quaternary ammonium salts（Abbreviation macrocation）；Wherein, Polymeric quaternary ammonium salts be because that can provide multiple Cation adsorption points simultaneously, when
It is adsorbed to behind mud shale surface, is difficult to be desorbed, therefore it suppresses the effect of shale hydration expansion generally than small molecule season
Ammonium salt is good, and with permanent stability.But there is also serious deficiency for existing polymeric quartenary ammonium salt inhibitor：
（1）It is particularly thorny between molecular weight and drilling fluid rheology.Because existing Polymeric quaternary ammonium salts inhibitor molecules amount is general
All over higher, the rheological characteristic of drilling fluid can be made to occur drastically to change when using, thus need to add other inorganic agents and readjust brill
Well liquid rheological characteristic, causes fluid maintenance high expensive.
（2）Under high temperature（100 DEG C of ＞）Inhibition need further raising.At present, most Polymeric quaternary ammonium salts without
Method makes mud shale at high temperature（100 DEG C of ＞）Heat roll back yield higher than 85%, to find out its cause, being primarily due to lack in strand
Weary resistant to elevated temperatures hydrophobic structure unit.
The content of the invention
To overcome polymeric quartenary ammonium salt inhibitor above shortcomings, the present invention is proposed with low molecule amount（Molecular weight ＜
5.0×105g/mol）Water insoluble hydrophobic PAMC is as shale inhibitor, in PAMC point
Higher hydrocarbyl acrylate is introduced in subchain as high temperature resistant hydrophobic structure unit, PAMC is improved at high temperature
To the inhibition of mud shale.
The purpose of the present invention be for existing polymeric quartenary ammonium salt inhibitor not enough problem there is provided a kind of high temperature resistant,
Low molecule amount（Molecular weight ＜ 5.0 × 105g/mol）Water insoluble hydrophobic PAMC inhibitor and preparation method thereof and
Using.
The present invention is achieved by the following technical solutions：A kind of high temperature resistant PAMC inhibitor, it is special
Levy and be, the inhibitor is formed by acrylamide, cationic monomer, hydrophobic monomer copolymerization, and its structural formula is as follows：
X, y, z represents polymer in formula；R1For straight or branched alkyl, it is generally preferable to be the straight chain that carbon atom quantity is 12 ~ 18
Alkyl；R2For hydrogen atom or methyl；R3For hydrogen atom or methyl.
A kind of preparation method of high temperature resistant PAMC inhibitor, comprises the following steps：
（1）At a temperature of 25 ~ 50 DEG C, according to monomer mass percentage, by acrylamide 40 ~ 60%, cationic monomer 35 ~
40%th, hydrophobic monomer 0.5 ~ 8% is dissolved in organic in the mixed solvent, is configured to the reaction that monomer gross mass percent concentration is 1 ~ 10%
Liquid；
（2）Reaction solution is led to after 10 ~ 30min of nitrogen deoxygenation, the mass concentration for adding initiator is 3 ~ 5% ethanol solution, is triggered
The addition of agent is the 0.1 ~ 1% of monomer gross mass, then heats to 70 ~ 90 DEG C, reacts 3 ~ 7h；
（3）After reaction terminates, by reacting liquid filtering or centrifugation, pulverulent solids, as high temperature resistant cation poly- third are obtained
Acrylamide inhibitor.
As further improvement of these options, the cationic monomer is methylacryoyloxyethyl trimethyl ammonia chloride
Ammonium, acrylyl oxy-ethyl-trimethyl salmiac, one kind in octadecyldimethyl acroloyl ammonium chloride or any several mixed
Close；The hydrophobic monomer is dodecylacrylate, lauryl methacrylate, acrylic acid tetradecane base ester, metering system
Sour tetradecane base ester, aliphatic acrylate, methacrylic acid cetyl ester, octadecyl acrylate, metering system
Any mixing of one or more in sour stearyl；The initiator is azodiisobutyronitrile, the different heptyl of azo two, peroxide
Change one kind in benzoyl.
As further improvement of these options, organic mixed solvent is by percent by volume, by absolute ethyl alcohol
70 ~ 90% and butyl acetate 10 ~ 30% mix.
As further improvement of these options, the molecular weight of the high temperature resistant PAMC inhibitor can
Control is adjusted by the percent by volume for changing organic in the mixed solvent absolute ethyl alcohol and butyl acetate.
A kind of application of high temperature resistant PAMC inhibitor, at normal temperatures, by a certain amount of high temperature resistant sun from
Sub- polyacrylamide amine inhibitors are added to the water abundant prehydration, then uniform with drilling fluid mixed.
As further improvement of these options, the water mixes for any one or more in fresh water, salt solution, seawater
Close；Drilling fluid is water-base drilling fluid.
As further improvement of these options, on the basis of the weight of drilling fluid, described high temperature resistant cation gathers
The content of acrylic amide restrainer is 0.5 ~ 3 weight %.
Because the inhibitor molecules amount prepared by the present invention is lower than conventional Polymeric quaternary ammonium salts inhibitor molecules amount, and contain
Resistant to elevated temperatures hydrophobic structure unit, will not cause the rheological characteristic of drilling fluid to occur drastically to change, therefore, it is possible to overcome existing polymerization
Contradiction between thing quaternary ammonium salt inhibitor molecules amount and drilling fluid rheology.
The present invention has advantages below compared with prior art：
（1）Inhibitor molecules amount provided by the present invention is lower than common polymer quaternary ammonium salt inhibitor molecules amount, will not be to drilling well
Liquid rheology is affected greatly；
（2）The hydrophobic structure unit with chain alkyl is introduced in inhibitor provided by the present invention, strand, can be in high temperature
（100 DEG C of ＞）Under show good inhibition.
Embodiment
The process and effect of the present invention is further illustrated with reference to specific embodiment
Embodiment 1：
The method for preparing high temperature resistant PAMC inhibitor
Under 25 DEG C of temperature conditionss, according to monomer mass percentages, by acrylamide 60%, methylacryoyloxyethyl front three
Ammonium chloride 38%, lauryl methacrylate 2% is dissolved in be formed by 70% absolute ethyl alcohol and 30% butyl acetate by percent by volume
Solvent in, be configured to monomer gross mass percent concentration be 5% reaction solution；Reaction solution is led to after 10 ~ 30min of nitrogen deoxygenation,
The mass concentration for adding azodiisobutyronitrile is 5% ethanol solution, and the addition of azodiisobutyronitrile is monomer gross mass
0.2%；70 DEG C are then heated to, 7h is reacted；After reaction terminates, by reacting liquid filtering or centrifugation, pulverulent solids are obtained,
As high temperature resistant PAMC inhibitor.
Embodiment 2：
The method for preparing high temperature resistant PAMC inhibitor
Under 25 DEG C of temperature conditionss, according to monomer mass percentages, by acrylamide 60%, methylacryoyloxyethyl front three
Ammonium chloride 38%, lauryl methacrylate 2% is dissolved in be formed by 80% absolute ethyl alcohol and 20% butyl acetate by percent by volume
Solvent in, be configured to monomer gross mass percent concentration be 5% reaction solution；Reaction solution is led to after 10 ~ 30min of nitrogen deoxygenation,
The mass concentration for adding azodiisobutyronitrile is 5% ethanol solution, and the addition of azodiisobutyronitrile is monomer gross mass
0.2%；70 DEG C are then heated to, 7h is reacted；After reaction terminates, by reacting liquid filtering or centrifugation, pulverulent solids are obtained,
As high temperature resistant PAMC inhibitor.
Embodiment 3：
The method for preparing high temperature resistant PAMC inhibitor
Under 25 DEG C of temperature conditionss, according to monomer mass percentages, by acrylamide 60%, acrylyl oxy-ethyl-trimethyl chlorine
Change ammonium 39%, methacrylic acid cetyl ester 2% to be dissolved in and being formed by percent by volume by 80% absolute ethyl alcohol and 20% butyl acetate
Solvent in, be configured to monomer gross mass percent concentration be 4% reaction solution；Reaction solution is led to after 10 ~ 30min of nitrogen deoxygenation,
The mass concentration for adding benzoyl peroxide is 5% ethanol solution, and the addition of benzoyl peroxide is monomer gross mass
0.2%；80 DEG C are then heated to, 4h is reacted；After reaction terminates, by reacting liquid filtering or centrifugation, pulverulent solids are obtained,
As high temperature resistant PAMC inhibitor.
Embodiment 4：
The method for preparing high temperature resistant PAMC inhibitor
Under 25 DEG C of temperature conditionss, according to monomer mass percentages, by acrylamide 60%, methylacryoyloxyethyl front three
Ammonium chloride 39%, octadecyl methacrylate 1% is dissolved in by 70% absolute ethyl alcohol and 30% butyl acetate by percent by volume
In the solvent of formation, the reaction solution that monomer gross mass percent concentration is 5% is configured to；By reaction solution lead to nitrogen deoxygenation 10 ~
After 30min, the mass concentration for adding benzoyl peroxide is 3% ethanol solution, and the addition of benzoyl peroxide is total for monomer
The 0.2% of quality；80 DEG C are then heated to, 4h is reacted；After reaction terminates, by reacting liquid filtering or centrifugation, obtain powdered
Solid, as high temperature resistant PAMC inhibitor.
Experiment 1 determines the molecular weight of high temperature resistant PAMC inhibitor
Using the molecular weight of the inhibitor prepared by dynamic light scattering determination embodiment 1 ~ 4, concrete operations are as follows：
At room temperature, the inhibitor prepared by 0.5g embodiments 1 ~ 4 is weighed respectively, and 4 parts of 100mL deionizations are completely dissolved in respectively
In water, 4 parts of mass concentration 5mg/mL inhibitor mother liquor is configured to；
At room temperature, by 4 parts of inhibitor mother liquors be diluted to respectively with deionized water mass concentration be 0.5mg/mL, 1mg/mL,
1.5mg/mL, 2mg/mL, 2.5mg/mL the inhibitor aqueous solution, place 24h；
At room temperature, the special bottle of light scattering test is cleaned by ultrasonic for a long time with deionized water successively, uses ethanol soaking and washing,
It is stand-by after being cleaned repeatedly with the acetone through 0.45 μm of filtering with microporous membrane；
At room temperature, it is the above-mentioned inhibitor aqueous solution is scattered with light after 0.45 μm of syringe filters dust removal by filtration, is respectively charged into respectively
Penetrate in special bottle, use BI-200SM laser light scattering systems, using toluene as reference solution, in the case where excitation wavelength is 532nm, scattering
Angle is in the range of 15 ° ~ 120 °, scattering strength of the inhibitor aqueous solution to laser to be determined every 15 °, most afterwards through BI-200SM
Automatically conversion can draw the weight average molecular weight of inhibitor to laser light scattering system.
Above-mentioned inhibitor molecules amount measurement result is as shown in table 1.
The molecular weight and yield of inhibitor prepared by the embodiment 1 ~ 4 of table 1
The result of table 1 illustrates, using method provided by the present invention, can control the molecular weight of inhibitor of the present invention 50
×105In the range of；From table 1 embodiment 1 with from the point of view of the molecular weight of the inhibitor of embodiment 2, it is anhydrous in organic solvent by changing
The percent by volume of ethanol and butyl acetate, can be achieved the molecular-weight adjusting control of inhibitor of the present invention.
Experiment 2 determines the yield of high temperature resistant PAMC inhibitor
The yield that embodiment 1 ~ 4 prepares high temperature resistant PAMC inhibitor is determined using weight method, concrete operations are such as
Under：
The monomer gross mass in organic solvent, which is added, before reacting is designated as M1；Separating obtained PAMC after reacting
Inhibitor, under 50 DEG C of vacuum conditions, weighs after drying 24h, is designated as M2；By the M recorded1And M2It is used for according to equation below
Calculate the yield of inhibitor：
As shown in table 1, as can be seen from Table 1, the yield of inhibitor is more than 90% for the yield of the inhibitor of embodiment 1 ~ 4.
Test 3 inhibition evaluations
It should be noted that for the ease of determining high temperature resistant PAMC as the effect of shale-control agent for drilling fluid
Really, in this experiment, high temperature resistant PAMC is configured to by the aqueous solution using deionized water, to determine mud shale rock
Consider heat in the high temperature resistant PAMC aqueous solution to be worth doing to roll back yield, yield is rolled back with the heat of shale landwaste resistance to evaluate
High temperature PAMC is as the inhibition of shale-control agent for drilling fluid, and when evaluating, shale landwaste heat is rolled back
Yield is higher, illustrates that high temperature resistant PAMC is better to the inhibition of mud shale.Specific evaluation procedure is as follows：
High temperature resistant PAMC prepared in four parts of embodiments 4 is dissolved in deionized water respectively, matter is configured to
Amount percent concentration is respectively 0.5%, 1%, 1.5%, the 2% high temperature resistant PAMC aqueous solution；
Respectively into 350mL deionized waters and the above-mentioned various concentrations high temperature resistant PAMC aqueous solution of 350mL, respectively add
Entering 30g by 6 eye mesh screens but can fail mud shale landwaste by 10 eye mesh screens, be configured to 5 parts and treat test sample；
Treat that test sample is imported in roller furnace ageing can by 5 parts respectively, then ageing can is put into high temp roller furnace, at 120 DEG C,
After heat rolling 16h, take out, after temperature is down to room temperature, undispersed shale landwaste is recovered by filtration with 40 eye mesh screens；
By the shale landwaste of recovery after being dried at 100 DEG C to constant weight, weigh at room temperature, quality is designated as W, then according to following
The heat that formula calculates shale landwaste is rolled back yield：
Measured result is as shown in table 2.
Heat of the mud shale landwaste of table 2 in the aqueous solution of the inhibitor prepared by various concentrations embodiment 4 is rolled back
Yield
Remarks：Hot rolling condition is 120 DEG C, 16h.
The as shown by data of table 2, the inhibitor that the present invention is provided has excellent inhibition at high temperature, when inhibitor is being gone
When mass concentration percentage in ionized water is 1%, mud shale landwaste is at 120 DEG C, and the rate of recovery after heat rolling 16h may be up to 90%
More than.
Test the contrast of 4 inhibitions
In order to further illustrate the superior resistance of inhibitor provided by the present invention at high temperature, spy will be provided by the present invention
Inhibition of the inhibitor with commercial polymer quaternary ammonium salt and organic molecule quaternary ammonium salt inhibitor at high temperature to mud shale is entered
Contrast is gone, commercial polymer quaternary ammonium salt and organic molecule quaternary ammonium salt inhibitor are provided by Chengdu Xi Youhuawei companies；It is commercial
The commercial disignation of polymeric quartenary ammonium salt inhibitor is DY-1, and molecular weight is ＞ 1.0 × 106g/mol；Commercial organic molecule quaternary ammonium
The commercial disignation of salt inhibitor is JA-1, and molecular weight is 151.63.
The inhibitor and DY-1 prepared by embodiment 1 ~ 4 are dissolved in deionized water respectively, mass concentration percentage is configured to
Number is 1% aqueous solution；
Remaining testing procedure is as described in experiment 3, and measured result is as shown in table 3.
The inhibitor provided by the present invention of table 3 is contrasted with commercial polymer quaternary ammonium salt inhibition
Remarks：Hot rolling condition is 120 DEG C, 16h.
The as shown by data of table 3, in high temperature（120℃）Under, suppression of the inhibitor provided by the present invention to mud shale landwaste is imitated
Fruit is substantially better than commercial polymer quaternary ammonium salt and organic molecule quaternary ammonium salt inhibitor；Using inhibitor provided by the present invention,
The heat of mud shale landwaste at high temperature yield of rolling back is up to more than 90%, and uses commercial polymer quaternary ammonium salt inhibitor DY-1
With organic molecule quaternary ammonium salt JA-1, the heat of mud shale landwaste at high temperature yield of rolling back is only 40.3% and 62.5%.
Test influence contrast of 5 inhibitor to drilling fluid rheology
In order to illustrate that there is good compatibility between inhibitor provided by the present invention and water-base drilling fluid rheological characteristic, to addition 1%
It is water base after 1% commercial polymer quaternary ammonium salt DY-1 of the rheological characteristic of water-base drilling fluid and addition after inhibitor prepared by embodiment 4 to bore
The rheological characteristic of well liquid is contrasted, and its result is as shown in table 4.
What deserves to be explained is, water-based drilling formula of liquid used and respective handling agent are by the western oil Hua Wei in Chengdu in the present embodiment
Company provides, and the density of water-base drilling fluid is density 1.32g/cm3, water-based drilling formula of liquid composition and respective handling agent title are such as
Shown in table 5.
Rheology measurement step is as follows：
At room temperature, 3 parts of water-base drilling fluids are prepared by formula composition shown in table 5；
At normal temperatures, the inhibitor prepared by 4.62g embodiments 4 and 4.62g commercial polymer quaternary ammonium salts DY-1 are used respectively
After the abundant prehydration of 10mL deionized waters, it is added separately in 2 parts of 350mL water-base drilling fluids, is stirred under 10000rpm rotating speeds
5min, using the fast rotation viscometer of normal form six（Qingdao is purchased from spring oil Instrument Ltd., the trade mark is ZNN-D6B）Determine 2
Water base drilling fluid system and unchecked dose of water-base drilling fluid of the part added with different inhibitor（Base is starched）In 120 DEG C of aging 16h
Front and rear 600 turns（Φ600）With 300 turns（Φ300）Reading, and according to the apparent viscosity of below equation calculating drilling fluid（AV）、
Plastic viscosity（PV）, yield value（YP）And ratio of dynamic shear force/yield value to plastic viscosity：
Wherein, AV- apparent viscosities, mPa s；PV- plastic viscosities, mPa s；YP- yield values, Pa；Ratio of dynamic shear force/yield value to plastic viscosity unit is Pa/mPa
s。
Inhibitor and commercial polymer quaternary ammonium salt DY-1 are to water-base drilling fluid rheology impact pair prepared by the embodiment 4 of table 4
Than
Remarks：Aging condition is 120 DEG C, 16h.
As can be seen from Table 4, add after 1% commercial polymer quaternary ammonium salt DY-1, compared with base is starched, water-base drilling fluid
Rheological characteristic occur drastically to change, either before ageing still after weathering, water-base drilling fluid apparent viscosity, plastic viscosity are equal
Add more than 1 times, nearly 1 times of yield value increase；The inhibitor prepared by 1% embodiment 4 is added, compared with base is starched, water-base drilling fluid
Although rheological characteristic also changed, change unobvious, either before ageing still after weathering, water-base drilling fluid table
Viscosity, plastic viscosity, the incrementss of yield value are seen less than 0.5 times；From table 4 from the point of view of the change of ratio of dynamic shear force/yield value to plastic viscosity, 1% is added commercial
After Polymeric quaternary ammonium salts DY-1, either before ageing still after weathering, compared with base is starched, the ratio of dynamic shear force/yield value to plastic viscosity of water-base drilling fluid is equal
Decrease, the shear thinning behavior of this explanation water-base drilling fluid is deteriorated；The inhibitor prepared by 1% embodiment 4 is added, either
Before ageing still after weathering, the ratio of dynamic shear force/yield value to plastic viscosity that the ratio of dynamic shear force/yield value to plastic viscosity of water-base drilling fluid is starched before aging with base can be consistent substantially, this
Illustrate that the ability of inhibitor stable waterborne drilling well shear thinning behavior prepared by embodiment 4 is stronger.
In general, the result of table 4 shows, the inhibitor that provides of the present invention not only water-base drilling fluid rheological characteristic is produced compared with
Big influence, but also the rheological characteristic under water-base drilling fluid high temperature can be made to keep stable.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited to above-mentioned embodiment
Detail, in the range of the technology design of the present invention, can carry out a variety of simple variants to technical scheme, these
Simple variant belongs to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, can also be combined between the various different embodiments of the present invention, as long as it is without prejudice to this hair
Bright thought, it should equally be considered as content disclosed in this invention.
Claims (8)
1. a kind of high temperature resistant PAMC inhibitor, it is characterised in that the inhibitor is by acrylamide, cation
Monomer, hydrophobic monomer copolymerization are formed, and its structural formula is as follows：
X, y, z represents polymer in formula；R1For straight or branched alkyl, it is generally preferable to be the straight chain alkane that carbon atom quantity is 12 ~ 18
Base；R2For hydrogen atom or methyl；R3For hydrogen atom or methyl.
2. a kind of preparation method of high temperature resistant PAMC inhibitor as claimed in claim 1, it is characterised in that bag
Include following steps：
（1）At a temperature of 25 ~ 50 DEG C, according to monomer mass percentage, by acrylamide 40 ~ 60%, cationic monomer 35 ~
40%th, hydrophobic monomer 0.5 ~ 8% is dissolved in organic in the mixed solvent, is configured to the reaction that monomer gross mass percent concentration is 1 ~ 10%
Liquid；
（2）Reaction solution is led to after 10 ~ 30min of nitrogen deoxygenation, the mass concentration for adding initiator is 3 ~ 5% ethanol solution, is triggered
The addition of agent is the 0.1 ~ 1% of monomer gross mass, then heats to 70 ~ 90 DEG C, reacts 3 ~ 7h；
（3）After reaction terminates, by reacting liquid filtering or centrifugation, pulverulent solids, as high temperature resistant cation poly- third are obtained
Acrylamide inhibitor.
3. a kind of preparation method of high temperature resistant PAMC inhibitor as claimed in claim 2, it is characterised in that institute
Cationic monomer is stated for MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, acrylyl oxy-ethyl-trimethyl salmiac, octadecyl
One kind or any several mixing in dimethyl propylene allyl ammonium chloride；The hydrophobic monomer is dodecylacrylate, first
Base dodecyl acrylate, acrylic acid tetradecane base ester, methacrylic acid tetradecane base ester, aliphatic acrylate, methyl-prop
Any mixing of one or more in olefin(e) acid cetyl ester, octadecyl acrylate, octadecyl methacrylate；Institute
It is one kind in azodiisobutyronitrile, the different heptyl of azo two, benzoyl peroxide to state initiator.
4. a kind of preparation method of high temperature resistant PAMC inhibitor as claimed in claim 2, it is characterised in that institute
It is, by percent by volume, to be mixed by absolute ethyl alcohol 70 ~ 90% and butyl acetate 10 ~ 30% to state organic mixed solvent.
5. a kind of preparation method of high temperature resistant PAMC inhibitor as claimed in claim 4, it is characterised in that institute
The molecular weight for stating high temperature resistant PAMC inhibitor can be by changing organic in the mixed solvent absolute ethyl alcohol and acetic acid
Control is adjusted in the percent by volume of butyl ester.
6. a kind of application of the high temperature resistant PAMC inhibitor as described in claim 1,3 or 5 any one, its feature
It is, at normal temperatures, a certain amount of high temperature resistant PAMC inhibitor is added to the water abundant prehydration, then
It is uniform with drilling fluid mixed.
7. a kind of application of high temperature resistant PAMC inhibitor as claimed in claim 6, it is characterised in that the water
For any one or more mixing in fresh water, salt solution, seawater；Drilling fluid is water-base drilling fluid.
8. a kind of application of high temperature resistant PAMC inhibitor as claimed in claim 6, it is characterised in that with drilling well
On the basis of the weight of liquid, the content of described high temperature resistant PAMC inhibitor is 0.5 ~ 3 weight %.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113667461A (en) * | 2021-08-21 | 2021-11-19 | 中国石油大学(华东) | High-temperature-resistant super-hydrophobic shale inhibitor and preparation method and application thereof |
| CN113956855A (en) * | 2021-11-17 | 2022-01-21 | 中国石油大学(华东) | Cationic anti-sloughing agent for water-based drilling fluid and preparation method and application thereof |
| CN114686190A (en) * | 2021-12-14 | 2022-07-01 | 中国石油天然气集团有限公司 | High-temperature-resistant and saturated-salt-resistant plugging fluid loss agent and preparation method thereof |
| CN114835850A (en) * | 2022-05-19 | 2022-08-02 | 中国石油大学(华东) | Polymeric ionic liquid inhibitor and preparation method and application thereof |
| CN115536777A (en) * | 2022-11-08 | 2022-12-30 | 中国石油大学(华东) | Micromolecular hydrophobic association high-temperature-resistant shale inhibitor and preparation method and application thereof |
| CN115746803A (en) * | 2022-11-02 | 2023-03-07 | 中国石油化工股份有限公司 | Shale gas formation hydrophobic strong plugging water-based drilling fluid |
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Cited By (8)
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| CN113667461A (en) * | 2021-08-21 | 2021-11-19 | 中国石油大学(华东) | High-temperature-resistant super-hydrophobic shale inhibitor and preparation method and application thereof |
| CN113956855A (en) * | 2021-11-17 | 2022-01-21 | 中国石油大学(华东) | Cationic anti-sloughing agent for water-based drilling fluid and preparation method and application thereof |
| CN114686190A (en) * | 2021-12-14 | 2022-07-01 | 中国石油天然气集团有限公司 | High-temperature-resistant and saturated-salt-resistant plugging fluid loss agent and preparation method thereof |
| CN114835850A (en) * | 2022-05-19 | 2022-08-02 | 中国石油大学(华东) | Polymeric ionic liquid inhibitor and preparation method and application thereof |
| CN114835850B (en) * | 2022-05-19 | 2023-01-17 | 中国石油大学(华东) | Polymeric ionic liquid inhibitor and preparation method and application thereof |
| CN115746803A (en) * | 2022-11-02 | 2023-03-07 | 中国石油化工股份有限公司 | Shale gas formation hydrophobic strong plugging water-based drilling fluid |
| CN115536777A (en) * | 2022-11-08 | 2022-12-30 | 中国石油大学(华东) | Micromolecular hydrophobic association high-temperature-resistant shale inhibitor and preparation method and application thereof |
| CN115536777B (en) * | 2022-11-08 | 2023-08-04 | 中国石油大学(华东) | Small-molecular hydrophobic association high-temperature-resistant shale inhibitor and preparation method and application thereof |
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