CN106967196B - A kind of high temperature resistant cationic polyacrylamide inhibitor and its preparation method and application - Google Patents
A kind of high temperature resistant cationic polyacrylamide inhibitor and its preparation method and application Download PDFInfo
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- 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
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- C09K8/02—Well-drilling compositions
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Abstract
The invention belongs to the inhibitor technical fields of water-base drilling fluid, the present invention relates to a kind of high temperature resistant cationic polyacrylamide inhibitor and its preparation method and application, the inhibitor is to be copolymerized to be formed by acrylamide, cationic monomer, hydrophobic monomer, the application method of the inhibitor are as follows: at normal temperature, a certain amount of high temperature resistant cationic polyacrylamide inhibitor is added to the water abundant prehydration, it is then uniform with drilling fluid mixed.The present invention is had the advantage that compared with prior art since the cationic polyacrylamide inhibitor molecules amount is low, and contain hydrophobic structure unit resistant to high temperature, therefore it not only can solve the contradiction between existing Polymeric quaternary ammonium salts inhibitor molecules amount and drilling fluid rheology, but also (100 DEG C of >) has excellent inhibition at high temperature.
Description
Technical field
The invention belongs to the inhibitor technical fields of water-base drilling fluid, and the present invention relates to a kind of high temperature resistant cation polypropylenes
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
Cationic polyacrylamide shale control agent and its preparation method and application.
Background technique
Inhibitor is the indispensable component part of water-base drilling fluid, and 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 send 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, plays the effect for inhibiting shale hydration expansion.
Currently, there are two main classes for cationic inhibitor: one kind is small molecule quaternary ammonium salt (abbreviation small cation), 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 after being adsorbed to mud shale surface, is not easy to be desorbed, therefore it inhibits the effect of shale hydration expansion generally than small molecule season
Ammonium salt is good, and has permanent stability.But there is also serious deficiencies for existing polymeric quartenary ammonium salt inhibitor:
(1) particularly thorny between molecular weight and drilling fluid rheology.Due to existing Polymeric quaternary ammonium salts inhibitor molecules
Amount is universal higher, and when use can make the rheological characteristic of drilling fluid that change dramatically occur, thus need to be added other inorganic agents and adjust again
Whole drilling fluid rheology leads to fluid maintenance high expensive.
(2) inhibition of (100 DEG C of >) needs to be further increased under high temperature.Currently, most Polymeric quaternary ammonium salts without
Method makes the heat of mud shale (100 DEG C of >) at high temperature roll back yield higher than 85%, to find out its cause, being primarily due to lack in strand
Weary hydrophobic structure unit resistant to high temperature.
Summary of the invention
To overcome polymeric quartenary ammonium salt inhibitor above shortcomings, the present invention is proposed with low molecular weight (molecular weight <
5.0×105G/mol) water insoluble hydrophobic cationic polyacrylamide is as shale inhibitor, in cationic polyacrylamide point
Higher hydrocarbyl acrylate is introduced in subchain as high temperature resistant hydrophobic structure unit, improves cationic polyacrylamide at high temperature
To the inhibition of mud shale.
The purpose of the present invention is being directed to the insufficient problem of existing polymeric quartenary ammonium salt inhibitor, provide a kind of high temperature resistant,
Low molecular weight (molecular weight < 5.0 × 105G/mol) water insoluble hydrophobic cationic polyacrylamide inhibitor and preparation method thereof and
Using.
The present invention is achieved by the following technical solutions: a kind of high temperature resistant cationic polyacrylamide inhibitor, special
Sign is that the inhibitor is to be copolymerized to be formed by acrylamide, cationic monomer, hydrophobic monomer, and structural formula is as follows:
X, y, z indicates the degree of polymerization in formula；R1 is linear or branched alkyl group, it is generally preferable to be carbon atom quantity be 12 ~ 18
Straight chained alkyl；R2For hydrogen atom or methyl；R3For hydrogen atom or methyl.
A kind of preparation method of high temperature resistant cationic polyacrylamide inhibitor, comprising the following steps:
(1) 25 ~ 50 DEG C at a temperature of, according to monomer mass percentage, by acrylamide 40 ~ 60%, cationic monomer 35
~ 40%, 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) after reaction solution being led to 10 ~ 30min of nitrogen deoxygenation, the ethanol solution that the mass concentration of initiator is 3 ~ 5% is added,
The additional amount of initiator is the 0.1 ~ 1% of monomer gross mass, then heats to 70 ~ 90 DEG C, reacts 3 ~ 7h；
(3) after reaction, reaction solution is filtered or is centrifugated, obtain pulverulent solids, as high temperature resistant cation
Polyacrylamide amine inhibitors.
As further improvement of these options, the cationic monomer is methylacryoyloxyethyl trimethyl ammonia chloride
One of ammonium, acrylyl oxy-ethyl-trimethyl salmiac or any several mixing；The hydrophobic monomer is lauryl
Base ester, lauryl methacrylate, acrylic acid tetradecane base ester, methacrylic acid tetradecane base ester, aliphatic acrylate,
One or more of methacrylic acid cetyl ester, octadecyl acrylate, octadecyl methacrylate are any
Mixing；The initiator is one of azodiisobutyronitrile, the different heptyl of azo two, benzoyl peroxide.
As further improvement of these options, organic mixed solvent is by percent by volume, by dehydrated alcohol
70 ~ 90% and butyl acetate 10 ~ 30% mix.
As further improvement of these options, the molecular weight of the high temperature resistant cationic polyacrylamide inhibitor can
Control is adjusted in percent by volume by changing organic in the mixed solvent dehydrated alcohol and butyl acetate.
A kind of application of high temperature resistant cationic polyacrylamide inhibitor, at normal temperature, 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 be fresh water, salt water, in seawater any one or more is mixed
It closes；Drilling fluid is water-base drilling fluid.
As further improvement of these options, on the basis of the weight of drilling fluid, the high temperature resistant cation is poly-
The content of acrylic amide restrainer is 0.5 ~ 3 weight %.
The inhibitor molecules amount as prepared by the present invention is lower than common Polymeric quaternary ammonium salts inhibitor molecules amount, and contains
Hydrophobic structure unit resistant to high temperature, change dramatically occurs for the rheological characteristic that not will lead to drilling fluid, therefore can overcome existing polymerization
Contradiction between object quaternary ammonium salt inhibitor molecules amount and drilling fluid rheology.
The present invention has the advantage that 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 right
Drilling fluid rheology affects greatly；
(2) inhibitor provided by the present invention introduces the hydrophobic structure unit with chain alkyl, Neng Gou in strand
Good inhibition is shown under high temperature (100 DEG C of >).
Specific embodiment
Further illustrate process and effect of the invention combined with specific embodiments below
Embodiment 1:
The method for preparing high temperature resistant cationic polyacrylamide inhibitor
Under the conditions of 25 DEG C of temperature, according to monomer mass percentages, by acrylamide 60%, methylacryoyloxyethyl
Trimethyl ammonium chloride 38%, lauryl methacrylate 2% is dissolved in by 70% dehydrated alcohol and 30% butyl acetate by percent by volume
In the solvent of formation, it is configured to the reaction solution that monomer gross mass percent concentration is 5%；By reaction solution lead to nitrogen deoxygenation 10 ~
After 30min, the ethanol solution that the mass concentration of azodiisobutyronitrile is 5% is added, the additional amount of azodiisobutyronitrile is that monomer is total
The 0.2% of quality；70 DEG C are then heated to, 7h is reacted；After reaction, reaction solution is filtered or is centrifugated, obtained powdered
Solid, as high temperature resistant cationic polyacrylamide inhibitor.
Embodiment 2:
The method for preparing high temperature resistant cationic polyacrylamide inhibitor
Under the conditions of 25 DEG C of temperature, according to monomer mass percentages, by acrylamide 60%, methylacryoyloxyethyl
Trimethyl ammonium chloride 38%, lauryl methacrylate 2% is dissolved in by 80% dehydrated alcohol and 20% butyl acetate by percent by volume
In the solvent of formation, it is configured to the reaction solution that monomer gross mass percent concentration is 5%；By reaction solution lead to nitrogen deoxygenation 10 ~
After 30min, the ethanol solution that the mass concentration of azodiisobutyronitrile is 5% is added, the additional amount of azodiisobutyronitrile is that monomer is total
The 0.2% of quality；70 DEG C are then heated to, 7h is reacted；After reaction, reaction solution is filtered or is centrifugated, obtained powdered
Solid, as high temperature resistant cationic polyacrylamide inhibitor.
Embodiment 3:
The method for preparing high temperature resistant cationic polyacrylamide inhibitor
Under the conditions of 25 DEG C of temperature, according to monomer mass percentages, by acrylamide 60%, acrylyl oxy-ethyl front three
Ammonium chloride 39%, methacrylic acid cetyl ester 2% are dissolved in by 80% dehydrated alcohol and 20% butyl acetate by percent by volume
In the solvent of formation, it is configured to the reaction solution that monomer gross mass percent concentration is 4%；By reaction solution lead to nitrogen deoxygenation 10 ~
After 30min, the ethanol solution that the mass concentration of benzoyl peroxide is 5% is added, the additional amount of benzoyl peroxide is that monomer is total
The 0.2% of quality；80 DEG C are then heated to, 4h is reacted；After reaction, reaction solution is filtered or is centrifugated, obtained powdered
Solid, as high temperature resistant cationic polyacrylamide inhibitor.
Embodiment 4:
The method for preparing high temperature resistant cationic polyacrylamide inhibitor
Under the conditions of 25 DEG C of temperature, according to monomer mass percentages, by acrylamide 60%, methylacryoyloxyethyl
Trimethyl ammonium chloride 39%, octadecyl methacrylate 1% is dissolved in by 70% dehydrated alcohol and 30% butyl acetate by volume hundred
Divide in the solvent than being formed, is configured to the reaction solution that monomer gross mass percent concentration is 5%；By reaction solution lead to nitrogen deoxygenation 10 ~
After 30min, the ethanol solution that the mass concentration of benzoyl peroxide is 3% is added, the additional amount of benzoyl peroxide is that monomer is total
The 0.2% of quality；80 DEG C are then heated to, 4h is reacted；After reaction, reaction solution is filtered or is centrifugated, obtained powdered
Solid, as high temperature resistant cationic polyacrylamide inhibitor.
The molecular weight of 1 measurement high temperature resistant cationic polyacrylamide inhibitor of experiment
Using the molecular weight of inhibitor prepared by dynamic light scattering determination embodiment 1 ~ 4, concrete operations are as follows:
At room temperature, inhibitor prepared by 0.5g embodiment 1 ~ 4 is weighed respectively, is completely dissolved in 4 parts of 100mL respectively and is gone
In ionized water, it is configured to the inhibitor mother liquor of 4 parts of mass concentration 5mg/mL；
At room temperature, 4 parts of inhibitor mother liquors are diluted to mass concentration with deionized water respectively is 0.5mg/mL, 1mg/
The inhibitor aqueous solution of mL, 1.5mg/mL, 2mg/mL, 2.5mg/mL are placed for 24 hours；
At room temperature, the dedicated bottle of light scattering test is successively cleaned by ultrasonic with deionized water for a long time, is impregnated with ethyl alcohol
Cleaning, repeatedly with stand-by after the acetone of 0.45 μm of filtering with microporous membrane cleans；
At room temperature, it after above-mentioned inhibitor aqueous solution being used 0.45 μm of syringe filters dust removal by filtration respectively, is respectively charged into
Light scatters in dedicated bottle, with BI-200SM laser light scattering system, using toluene as reference solution, and in the case where excitation wavelength is 532nm,
Angle of scattering is that an inhibitor aqueous solution is measured every 15 ° to the scattering strength of laser, most afterwards through BI- within the scope of 15 ° ~ 120 °
200SM laser light scattering system converts automatically can obtain the weight average molecular weight of inhibitor.
Above-mentioned inhibitor molecules measurement is fixed, and the results are shown in Table 1.
The molecular weight and yield of inhibitor prepared by 1 embodiment 1 ~ 4 of table
1 result of table explanation, using method provided by the present invention, can control the molecular weight of inhibitor of the present invention
50 × 105In range；From embodiment 1 in table 1 with from the point of view of the molecular weight of 2 inhibitor of embodiment, by change organic solvent in
The percent by volume of dehydrated alcohol and butyl acetate is, it can be achieved that the molecular-weight adjusting of inhibitor of the present invention controls.
The yield of 2 measurement high temperature resistant cationic polyacrylamide inhibitor of experiment
The yield of high temperature resistant cationic polyacrylamide inhibitor is prepared using weight method measurement embodiment 1 ~ 4, it is specific to grasp
Make as follows:
The monomer gross mass being added in organic solvent before reaction is denoted as M1；Separating obtained cation polypropylene after reacting
Amide inhibitors, under 50 DEG C of vacuum conditions, drying is weighed afterwards for 24 hours, is denoted as M2；The M that will be recorded1And M2According to following formula
For calculating the yield of inhibitor:
The yield of 1 ~ 4 inhibitor of embodiment is as shown in table 1, and as can be seen from Table 1, the yield of inhibitor is 90%
More than.
Test the evaluation of 3 inhibitions
It should be noted that for the ease of measurement high temperature resistant cationic polyacrylamide as shale-control agent for drilling fluid
Effect high temperature resistant cationic polyacrylamide is configured to by aqueous solution using deionized water, to measure mud page in this experiment
Heat of the rock landwaste in high temperature resistant cationic polyacrylamide aqueous solution is rolled back yield, rolls back yield with the heat of shale landwaste to comment
Inhibitory effect of the valence high temperature resistant cationic polyacrylamide as shale-control agent for drilling fluid, in evaluation, shale landwaste heat
Yield of rolling back is higher, illustrates that high temperature resistant cationic polyacrylamide is better to the inhibition of mud shale.Specific evaluation procedure is as follows:
High temperature resistant cationic polyacrylamide prepared in four parts of embodiments 4 is dissolved in deionized water respectively, is prepared
It is respectively 0.5%, 1%, 1.5%, 2% high temperature resistant cationic polyacrylamide aqueous solution at mass concentration percentage；
Respectively into 350mL deionized water and the above-mentioned various concentration high temperature resistant cationic polyacrylamide aqueous solution of 350mL,
Each 30g that is added can pass through 6 mesh screens but fail the mud shale landwaste by 10 mesh screens, be configured to 5 parts to test sample；
5 parts are imported in roller furnace ageing can to test sample respectively, then ageing can is put into high temp roller furnace, in 120
At DEG C, after heat rolling 16h, takes out, be cooled to room temperature to temperature, undispersed shale landwaste is recovered by filtration with 40 mesh screens；
The shale landwaste of recycling is dried at 100 DEG C to constant weight, is weighed at room temperature, quality is denoted as W, then basis
The heat that following formula calculate shale landwaste is rolled back yield:
Measured result is as shown in table 2.
Heat in the aqueous solution of 2 mud shale landwaste inhibitor prepared by various concentration embodiment 4 of table is rolled back
Yield
Remarks: hot rolling condition is 120 DEG C, 16h.
Table 2 statistics indicate that, inhibitor provided by the invention has excellent inhibition at high temperature, when inhibitor is being gone
When mass concentration percentage in ionized water is 1%, for mud shale landwaste at 120 DEG C, the rate of recovery after heat rolling 16h may be up to 90%
More than.
Test the comparison of 4 inhibitions
The superior resistance of provided inhibitor at high temperature in order to further illustrate the present invention, it is special to be proposed the present invention
The inhibitor and commercial polymer quaternary ammonium salt and small organic molecule quaternary ammonium salt inhibitor of confession at high temperature imitate the inhibition of mud shale
Fruit is compared, and commercial polymer quaternary ammonium salt and small organic molecule quaternary ammonium salt inhibitor are provided by Chengdu Xi Youhuawei company；
The commercial disignation of commercial polymer quaternary ammonium salt inhibitor is DY-1, and molecular weight is > 1.0 × 106g/mol；Commercial small organic molecule
The commercial disignation of quaternary ammonium salt inhibitor is JA-1, molecular weight 151.63.
Inhibitor prepared by embodiment 1 ~ 4 and DY-1 are dissolved in deionized water respectively, are configured to mass concentration percentage
Number is 1% aqueous solution；
For remaining testing procedure as described in experiment 3, measured result is as shown in table 3.
The inhibitor provided by the present invention of table 3 and commercial polymer quaternary ammonium salt inhibition compare
Remarks: hot rolling condition is 120 DEG C, 16h.
Table 3 statistics indicate that, under high temperature (120 DEG C), inhibitor provided by the present invention imitates the inhibition of mud shale landwaste
Fruit is substantially better than commercial polymer quaternary ammonium salt and small organic molecule quaternary ammonium salt inhibitor；Using inhibitor provided by the present invention,
The heat of mud shale landwaste at high temperature roll back yield be up to 90% or more, and use commercial polymer quaternary ammonium salt inhibitor DY-1
With small 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 comparison of 5 inhibitor to drilling fluid rheology
In order to illustrate having good compatibility between inhibitor provided by the present invention and water-base drilling fluid rheological characteristic, to adding
Add after inhibitor prepared by 1% embodiment 4 water after 1% commercial polymer quaternary ammonium salt DY-1 of the rheological characteristic of water-base drilling fluid and addition
The rheological characteristic of base drilling fluid is compared, and the results are shown in Table 4.
It is worth noting that 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-base drilling fluid formula composition and respective handling agent title are such as
Shown in table 5.
Steps are as follows for rheology measurement:
At room temperature, 3 parts of water-base drilling fluids are prepared by formula composition shown in table 5；
At normal temperature, inhibitor prepared by 4.62g embodiment 4 and 4.62g commercial polymer quaternary ammonium salt DY-1 are distinguished
After the abundant prehydration of 10mL deionized water, it is added separately in 2 parts of 350mL water-base drilling fluids, is stirred under 10000rpm revolving speed
5min is mixed, is measured using the fast rotational viscometer (being purchased from Qingdao with spring petroleum Instrument Ltd., trade mark ZNN-D6B) of normal form six
2 parts added with the water base drilling fluid system of different inhibitor and unchecked dose of water-base drilling fluid (base slurry) in 120 DEG C of aging 16h
600 turns (Φ 600) of front and back and 300 turns (Φ 300) reading, and according to the following formula calculate drilling fluid apparent viscosity (AV),
Plastic viscosity (PV), yield value (YP) and ratio of dynamic shear force/yield value to plastic viscosity:
Wherein, AV- apparent viscosity, mPa s；PV- plastic viscosity, mPa s；YP- yield value, Pa；Ratio of dynamic shear force/yield value to plastic viscosity unit is Pa/
mPa‧s。
Inhibitor prepared by 4 embodiment 4 of table and commercial polymer quaternary ammonium salt DY-1 are to water-base drilling fluid rheology impact pair
Than
Remarks: aging condition is 120 DEG C, 16h.
As can be seen from Table 4, after 1% commercial polymer quaternary ammonium salt DY-1 being added, compared with base slurry, water-base drilling fluid
Rheological characteristic change dramatically occurs, either before ageing still after weathering, water-base drilling fluid apparent viscosity, plastic viscosity are equal
It increases more than 1 times, yield value increases nearly 1 times；Inhibitor prepared by 1% embodiment 4 is added, compared with base slurry, water-base drilling fluid
Although rheological characteristic also changed, change it is 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 the point of view of the variation of ratio of dynamic shear force/yield value to plastic viscosity in table 4, it is commercial to be added 1%
After Polymeric quaternary ammonium salts DY-1, either before ageing still after weathering, compared with base slurry, the ratio of dynamic shear force/yield value to plastic viscosity of water-base drilling fluid is equal
It decreases, this illustrates that the shear thinning behavior of water-base drilling fluid is deteriorated；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, table 4 the result shows that, inhibitor provided by the invention not only to water-base drilling fluid rheological characteristic generate compared with
It is big to influence, but also the rheological characteristic under water-base drilling fluid high temperature can be made to keep stablizing.
The preferred embodiment of the present invention has been described above in detail, still, what present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, these
Simple variant all belongs to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, any combination can also be carried out between various different embodiments of the invention, as long as it is without prejudice to this hair
Bright thought, it should also be regarded as the disclosure of the present invention.
Claims (6)
1. a kind of high temperature resistant cationic polyacrylamide inhibitor, which is characterized in that the high temperature resistant cationic polyacrylamide
The preparation method of inhibitor, comprising the following steps:
Under the conditions of 25 DEG C of temperature, according to monomer mass percentages, by acrylamide 60%, methylacryoyloxyethyl front three
Ammonium chloride 38%, lauryl methacrylate 2%, which is dissolved in, to be formed by 70% dehydrated alcohol and 30% butyl acetate by percent by volume
Solvent in, be configured to monomer gross mass percent concentration be 5% reaction solution；After reaction solution is led to 10 ~ 30min of nitrogen deoxygenation,
The ethanol solution that the mass concentration of azodiisobutyronitrile is 5% is added, the additional amount of azodiisobutyronitrile is monomer gross mass
0.2%；70 DEG C are then heated to, 7h is reacted；After reaction, reaction solution is filtered or is centrifugated, obtain pulverulent solids,
As high temperature resistant cationic polyacrylamide inhibitor.
2. a kind of high temperature resistant cationic polyacrylamide inhibitor, which is characterized in that the high temperature resistant cationic polyacrylamide
The preparation method of inhibitor, comprising the following steps:
Under the conditions of 25 DEG C of temperature, according to monomer mass percentages, by acrylamide 60%, methylacryoyloxyethyl front three
Ammonium chloride 38%, lauryl methacrylate 2%, which is dissolved in, to be formed by 80% dehydrated alcohol and 20% butyl acetate by percent by volume
Solvent in, be configured to monomer gross mass percent concentration be 5% reaction solution；After reaction solution is led to 10 ~ 30min of nitrogen deoxygenation,
The ethanol solution that the mass concentration of azodiisobutyronitrile is 5% is added, the additional amount of azodiisobutyronitrile is monomer gross mass
0.2%；70 DEG C are then heated to, 7h is reacted；After reaction, reaction solution is filtered or is centrifugated, obtain pulverulent solids,
As high temperature resistant cationic polyacrylamide inhibitor.
3. a kind of high temperature resistant cationic polyacrylamide inhibitor, which is characterized in that the high temperature resistant cationic polyacrylamide
The preparation method of inhibitor, comprising the following steps:
Under the conditions of 25 DEG C of temperature, according to monomer mass percentages, by acrylamide 60%, methylacryoyloxyethyl front three
Ammonium chloride 39%, octadecyl methacrylate 1% is dissolved in by 70% dehydrated alcohol and 30% butyl acetate by percent by volume
In the solvent of formation, it is configured to the reaction solution that monomer gross mass percent concentration is 5%；By reaction solution lead to nitrogen deoxygenation 10 ~
After 30min, the ethanol solution that the mass concentration of benzoyl peroxide is 3% is added, the additional amount of benzoyl peroxide is that monomer is total
The 0.2% of quality；80 DEG C are then heated to, 4h is reacted；After reaction, reaction solution is filtered or is centrifugated, obtained powdered
Solid, as high temperature resistant cationic polyacrylamide inhibitor.
4. a kind of application of the high temperature resistant cationic polyacrylamide inhibitor as described in any one of claim 1-3, special
Sign is, at normal temperature, a certain amount of high temperature resistant cationic polyacrylamide inhibitor is added to the water abundant prehydration, so
It is uniform with drilling fluid mixed afterwards.
5. a kind of application of high temperature resistant cationic polyacrylamide inhibitor as claimed in claim 4, which is characterized in that the water
For any one or more mixing in fresh water, salt water, seawater；Drilling fluid is water-base drilling fluid.
6. a kind of application of high temperature resistant cationic polyacrylamide inhibitor as claimed in claim 4, which is characterized in that with drilling well
On the basis of the weight of liquid, the content of the high temperature resistant cationic polyacrylamide inhibitor is 0.5 ~ 3 weight %.
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| CN113667461B (en) * | 2021-08-21 | 2022-12-02 | 中国石油大学(华东) | High-temperature-resistant super-hydrophobic shale inhibitor, and preparation method and application thereof |
| CN113956855B (en) * | 2021-11-17 | 2023-05-23 | 中国石油大学(华东) | Cationic collapse preventing 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 |
| 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 |
| 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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| CA2807700C (en) * | 2013-03-07 | 2018-05-22 | Anming Wu | Drilling fluid composition |
| US9695350B2 (en) * | 2013-05-31 | 2017-07-04 | Halliburton Energy Services, Inc. | Ampholyte polymeric compounds in subterranean applications |
| CN104558404B (en) * | 2013-10-28 | 2017-01-25 | 中国石油化工股份有限公司 | Hydrophobically associating polymer for shale gas exploitation |
| CN105924575A (en) * | 2016-06-28 | 2016-09-07 | 江西富诚环保新材料科技有限公司 | Composite drag reducer special for shale gas and preparation method thereof |
| CN106279520B (en) * | 2016-08-31 | 2018-10-12 | 成都西油华巍科技有限公司 | A kind of drilling fluid amide polymer shale control agent and preparation method thereof |
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2017
- 2017-02-27 CN CN201710108221.4A patent/CN106967196B/en not_active Expired - Fee Related
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