CN106046251A - Temperature-resistant and salt-tolerant polymeric filtrate loss reducer for water-based drilling fluid and method for preparing temperature-resistant and salt-tolerant polymeric filtrate loss reducer - Google Patents
Temperature-resistant and salt-tolerant polymeric filtrate loss reducer for water-based drilling fluid and method for preparing temperature-resistant and salt-tolerant polymeric filtrate loss reducer Download PDFInfo
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- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
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- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
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Abstract
The invention relates to a temperature-resistant and salt-tolerant polymeric filtrate loss reducer for water-based drilling fluid and a method for preparing the temperature-resistant and salt-tolerant polymeric filtrate loss reducer. The method includes copolymerizing monomers of alkenyl amide, alkenyl propanesulfonic acid, alkenyl ammonium chloride and vinyl pyrrolidone by the aid of free radical solution polymerization processes according to certain proportions to obtain the temperature-resistant and salt-tolerant polymeric filtrate loss reducer. The relative molecular mass of copolymers is 100-300 thousands. The temperature-resistant and salt-tolerant polymeric filtrate loss reducer and the method have the advantages that the temperature-resistant and salt-tolerant polymeric filtrate loss reducer is high in temperature resistance (the temperature-resistant and salt-tolerant polymeric filtrate loss reducer can resist temperatures of 220 DEG C) and is still excellent in filtrate loss reducing performance in high-salinity environments, and basic mud systems are good in rheological property after the temperature-resistant and salt-tolerant polymeric filtrate loss reducer is added into the basic mud systems; high-temperature thickening can be prevented, accordingly, requirements of current deep drilling operation can be met, the method is simple and is high in yield, and conditions are mild.
Description
Technical field
The present invention relates to a kind of Process of Oil Well Drilling is applicable to the water-base drilling fluid temperature resistance salt tolerant fall filter of deep formation
Lose agent and preparation method thereof, particularly to amphoteric ion polymer fluid loss additive and preparation method thereof.
Background technology
Along with the reinforcement to deep formation Oil And Gas Exploration And Development dynamics, drilling depth constantly increases, and bottom hole temperature (BHT) is held
Height of continuing rising, and the probability on the high saliferous calcium stratum of brill chance is also in increase, as the filtrate reducing of water base drilling fluid system key inorganic agent
Agent often faces the baptism that high temperature invades simultaneously with salt calcium, and development has the fluid loss additive of temperature resistance salt resistant character concurrently has become oil
The task of top priority in chemical research field, field.
Polymerization species fluid loss additive is the additive for drilling fluid being used widely in recent years, by between itself and clay particle
Adsorption and self high polymer characteristic, make drilling fluid form fine and close hypotonic filter cake, reduction drilling fluid during leak-off
Filter loss, and control its rheological property simultaneously.But when drilling fluid is chronically at hot environment, the molecular structure of fluid loss additive is easy
Thermal degradation occurring, loses high polymer characteristic, and its molecular thermalmotion aggravates because being heated, desorption probability increases, and causes filtrate reducing
Agent was lost efficacy, and the intrusion of salt calcium then can be further exacerbated by the inefficacy of fluid loss additive.
The polymer filtrate reducer of China's on-the-spot application at present is many by strengthening consumption and compounding with other inorganic agents
Mode, to realize the technology requirement of system temperature resistance salt tolerant, thus bring the defects such as with high costs, Drilling Fluid Viscosity is excessive.Logical
Cross and analyze the mechanism of action of this type of fluid loss additive and understand, promote the fundamental way of its temperature resistance salt resistant character and be to optimize its molecule knot
Structure designs.
Summary of the invention
It is an object of the invention to provide a kind of water-base drilling fluid temperature resistance salt tolerant polymer filtrate reducer, this fluid loss additive
There is good heat-resisting property (temperature resistance is up to 220 DEG C), there is stronger anti-salt calcium ability simultaneously.
It is a further object to provide the preparation method of this fluid loss additive, this fluid loss additive passes through free-atom aqueous solution
Polyreaction and obtain, its preparation method is simple to operate, mild condition, and yield is higher.
For reaching above technical purpose, the present invention provides techniques below scheme.
The present invention provides a kind of quadripolymer fluid loss additive, and this quadripolymer formula is as follows:
Wherein, M is Na or K；
A=55%～65%, b=15%～30%, c=5%～15%, d=1-a-b-c.
This fluid loss additive is anti-by polymerization by eneamide, thiazolinyl propane sulfonic acid, thiazolinyl ammonium chloride and vinyl pyrrolidone
The copolymer that should generate, the relative molecular mass of this copolymer is 10～300,000.This fluid loss additive is called for short PTS.
The preparation method of the fluid loss additive of the present invention is as follows: weigh eneamide, thiazolinyl propane sulfonic acid, alkene according to a certain percentage
Ammonium chloride and four kinds of monomers of vinyl pyrrolidone, be dissolved in deionized water by thiazolinyl propane sulfonic acid, and with alkaline matter by solution
Regulation, to neutral, put into eneamide, thiazolinyl ammonium chloride and vinyl pyrrolidone, mix and blend, leads to after pouring reaction vessel into
It is warming up to predetermined temperature after nitrogen deoxygenation, puts into initiator, react to the scheduled time taking-up and be the thick finished product of fluid loss additive；Will
The thick finished product of fluid loss additive is dissolved in organic solvent, obtains fluid loss additive of the present invention after purifying.
Eneamide of the present invention is selected from acrylamide, N, N-DMAA, N, N-diethyl acryloyl
At least one of amine；Thiazolinyl propane sulfonic acid is selected from vinyl sulfonic acid sodium or potassium, sodium allylsulfonate or potassium, sodium p styrene sulfonate or potassium
At least one；Thiazolinyl ammonium chloride is selected from trihydroxyethyl allyl ammonium chloride, methyl dihydroxy ethyl allyl ammonium chloride and ethyl two
At least one of ethoxy allyl ammonium chloride；Vinyl pyrrolidone is selected from NVP.
Initiator of the present invention is oxidation-reduction initiator, is made up of with reducing agent oxidant, and its consumption is polymerization
(0.3～0.6) wt% of monomer total amount, wherein said oxidant is (0.5～2.0) with the mol ratio of reducing agent: 1；Wherein
At least one in potassium peroxydisulfate, Ammonium persulfate. and hydrogen peroxide of oxidant, reducing agent is selected from sodium sulfite, sulfurous acid
At least one in sodium, sodium thiosulfate.
Organic solvent used by fluid loss additive purification of the present invention is dehydrated alcohol, oxolane and at least the one of acetone
Kind.
The preparation method of the quadripolymer fluid loss additive of the present invention specifically comprises the following steps that
(1) weighing four kinds of monomers, mol ratio is eneamide: thiazolinyl propane sulfonic acid: thiazolinyl ammonium chloride: vinyl pyrrolidone
=(9～12): (2～4): (1～3): (1～2)；
(2) thiazolinyl propane sulfonic acid is dissolved in deionized water, is neutralized to pH=7～8 with sodium hydroxide, throw after pouring reaction vessel into
Enter eneamide, thiazolinyl ammonium chloride and vinyl pyrrolidone, mix and blend, logical nitrogen deoxygenation；
(3) logical nitrogen was warming up to 45～65 DEG C after 30 minutes, add the initiator of 0.3%～0.6wt%, monomer is the denseest
Degree is 15～30%, takes out white gels shape product, be the thick finished product of fluid loss additive after reacting 5～9 hours；
(4) thick for fluid loss additive finished product is dissolved in the organic solvent of excess, isolates precipitate, dry and pulverize, i.e. get Ben Fa
Publicly price-reduction fluid loss agents.
The invention still further relates to synthesize monomer thiazolinyl ammonium chloride needed for fluid loss additive, its structure is as follows:
Wherein R=-C2H4OH、-CH3Or-C2H5。
The preparation method of fluid loss additive monomer thiazolinyl ammonium chloride of the present invention is as follows: (1) weighs hydramine and chloropropene,
Mol ratio is hydramine: chloropropene=(2～4): (1～3)；
(2) both pour reaction vessel into, mix and blend, logical nitrogen is warming up to 40～60 DEG C after 30 minutes, reacts 4～9
Take out thick liquid after hour, be monomer crude product；
(3) monomer crude product is dissolved in the mixed organic solvents of excess, through being recrystallized to give white sticky paste, stands
After carry out reduce pressure sucking filtration, drying pulverize after i.e. obtain described monomer sterling.
Hydramine of the present invention is selected from least in triethanolamine, N methyldiethanol amine, N-ethyldiethanolamine
Kind.
The performance of the PTS series fluid loss additive prepared by more preferably evaluation, what introducing was prepared the most voluntarily has similar point
The fluid loss additive PDADS sample as a comparison of minor structure, compared for the performance of PTS series and PDADS, and the structural formula of PDADS is as follows:
Accompanying drawing explanation
Fig. 1 is the infrared spectrum spectrogram of intermediate monomer trihydroxyethyl allyl ammonium chloride of the present invention；
Fig. 2 is the infrared spectrum spectrogram of fluid loss additive PTS-1 of the present invention.
Detailed description of the invention
Embodiment 1: the preparation of fluid loss additive PTS-1
2-acrylamide-2-methylpro panesulfonic acid (AMPS) is dissolved in deionized water, with NaOH, solution is neutralized to
PH=7～8, by N,N-DMAA (DMAA), trihydroxyethyl allyl ammonium chloride (TAAC) and N-vinyl pyrrole
Alkanone (NVP) mixes with the solution after neutralization, and in the rear there-necked flask adding band thermometer, reflux, stirring, logical nitrogen is arranged
Oxygen.Progressively being warming up to 50 DEG C, logical nitrogen adds the initiator ammonium persulfate-sodium sulfite of 0.3% after 30 minutes, monomer is the denseest
Degree is 20%, after reacting 7 hours, is fully washed by gained white gels shape product dehydrated alcohol, isolates precipitate, high temperature
Drying pulverizing and obtain fluid loss additive PTS-1, obtain target product, productivity is 90.8%, and its reaction equation is as follows:
The structural characterization of fluid loss additive PTS-1:
See the infrared spectrum spectrogram that Fig. 2, Fig. 2 are PTS-1, the characteristic absorption peak of collection of illustrative plates be analyzed as follows:
3363cm-1Place is the stretching vibration absworption peak of O-H in copolymer；1645cm-1Place is in DMAA tertiary amide groups
C=O key chattering absworption peak；1548cm-1Place is N-H key stretching vibration absworption peak in TAAC；1498cm-1Place is in DMAA
C-N key stretching vibration peak；1444cm-1Place is the vibration absorption peak of methylene；1349cm-1Place is in DMAA tertiary amide groups
The characteristic absorption peak of C-N key；1220cm-1Place is-SO in AMPS3 -Vibration absorption peak；1027cm-1Place is in amide group
The stretching vibration peak of C-O-N；967cm-1Place is N-Cl ionic bond Absorption Characteristics peak in TAAC quaternary ammonium group；
From the infrared spectrum of fluid loss additive, with the molecular radical of anticipation in its molecular structure, thus infer, with mesh
Mark product structure is consistent.
Embodiment 2: the preparation of fluid loss additive PTS-2
2-acrylamide-2-methylpro panesulfonic acid (AMPS) is dissolved in deionized water, with NaOH, solution is neutralized to
PH=7～8, by N,N-DMAA (DMAA), methyl dihydroxy ethyl allyl ammonium chloride (TMAC) and N-vinyl
Ketopyrrolidine (NVP) mixes with the solution after neutralization, in the rear there-necked flask adding band thermometer, reflux, and stirring, logical nitrogen
Deoxygenation.Progressively being warming up to 50 DEG C, logical nitrogen adds the initiator ammonium persulfate-sodium sulfite of 0.3% after 30 minutes, monomer is total
Concentration is 20%, after reacting 7 hours, is fully washed by gained white gels shape product dehydrated alcohol, isolates precipitate, high
Temperature is dried pulverizing and is obtained fluid loss additive PTS-2, obtains target product, and productivity is 91.4%, and its reaction equation is as follows:
Embodiment 3: the preparation of fluid loss additive PTS-3
2-acrylamide-2-methylpro panesulfonic acid (AMPS) is dissolved in deionized water, with NaOH, solution is neutralized to
PH=7～8, by N,N-DMAA (DMAA), ethyl dihydroxy ethyl allyl ammonium chloride (TEAC) and N-vinyl
Ketopyrrolidine (NVP) mixes with the solution after neutralization, in the rear there-necked flask adding band thermometer, reflux, and stirring, logical nitrogen
Deoxygenation.Progressively being warming up to 50 DEG C, logical nitrogen adds the initiator ammonium persulfate-sodium sulfite of 0.3% after 30 minutes, monomer is total
Concentration is 20%, after reacting 7 hours, is fully washed by gained white gels shape product dehydrated alcohol, isolates precipitate, high
Temperature is dried pulverizing and is obtained fluid loss additive PTS-3, obtains target product, and productivity is 91.2%, and its reaction equation is as follows:
Embodiment 4: the preparation of fluid loss additive PTS-4
2-acrylamide-2-methylpro panesulfonic acid (AMPS) is dissolved in deionized water, with NaOH, solution is neutralized to
PH=7～8, by acrylamide (AM), methyl dihydroxy ethyl allyl ammonium chloride (TMAC) and NVP (NVP)
Mix with the solution after neutralizing, in the rear there-necked flask adding band thermometer, reflux, stirring, logical nitrogen deoxygenation.Progressively heat up
To 50 DEG C, logical nitrogen adds the initiator ammonium persulfate-sodium sulfite of 0.3% after 30 minutes, total monomer is 20%, instead
After answering 7 hours, fully being washed by gained white gels shape product dehydrated alcohol, isolate precipitate, high temperature is dried and is pulverized
To fluid loss additive PTS-4, obtaining target product, productivity is 91.4%, and its reaction equation is as follows:
Embodiment 5: the preparation of intermediate monomer
1, the preparation of intermediate monomer trihydroxyethyl allyl ammonium chloride
Weighing triethanolamine and chloropropene successively, molar ratio between the two is 1:1.5, adds three mouthfuls of band reflux
In flask, stirring, logical nitrogen deoxygenation, it is warming up to 55 DEG C, after reacting 6 hours, obtained orange-yellow thick liquid is dissolved in excess
Acetone, with the mixed solvent of dehydrated alcohol, carries out recrystallization to it, it is thus achieved that white sticky paste, stand at low temperature a period of time
Afterwards it being carried out the sucking filtration that reduces pressure, dry after pulverizing, obtain the trihydroxyethyl allyl ammonium chloride (TAAC) after purification, productivity is
91.2%, its reaction equation is as follows:
The structural characterization of trihydroxyethyl allyl ammonium chloride:
It is the infrared spectrum spectrogram of trihydroxyethyl allyl ammonium chloride referring to Fig. 1, Fig. 1, the characteristic absorption peak of spectrogram is divided
Analyse as follows:
It it is the stretching vibration absworption peak of O-H near 3363cm-1；Shake for the flexible of carbon-carbon double bond C=C near 1617cm-1
Dynamic absworption peak；1444cm-1 is the vibration absorption peak of methylene；It it is the vibration absorption peak of quaternary ammonium group near 967cm-1；
It is two kinds of different hydrocarbon bending vibration absworption peaks of HC=CH2 near 1049cm-1 with 829cm-1.
From the infrared spectrum of product, intermediate monomer, with the molecular radical of initial designs, is thus inferred, ties with target
Structure expection is consistent.
2, the preparation of intermediate monomer methyl dihydroxy ethyl allyl ammonium chloride
Weighing N methyldiethanol amine and chloropropene successively, molar ratio between the two is 1:1.5, adds band reflux
There-necked flask in, stirring, logical nitrogen deoxygenation, be warming up to 50 DEG C, after reacting 5 hours, obtained light yellow thick liquid be dissolved in
The acetone of excess, with the mixed solvent of dehydrated alcohol, carries out recrystallization to it, it is thus achieved that white sticky paste, stand at low temperature one
After the section time, it is carried out the sucking filtration that reduces pressure, dry after pulverizing, obtain the methyl dihydroxy ethyl allyl ammonium chloride after purification
(TMAC), productivity is 91.3%, and its reaction equation is as follows:
3, the preparation of intermediate monomer ethyl dihydroxy ethyl allyl ammonium chloride
Weighing N-ethyldiethanolamine and chloropropene successively, molar ratio between the two is 1:1.5, adds band reflux
There-necked flask in, stirring, logical nitrogen deoxygenation, be warming up to 50 DEG C, after reacting 5 hours, obtained transparent thick liquid be dissolved in
The acetone of amount, with the mixed solvent of dehydrated alcohol, carries out recrystallization to it, it is thus achieved that milky jelly, during stand at low temperature one section
After between, it is carried out the sucking filtration that reduces pressure, dry after pulverizing, obtain ethyl dihydroxy ethyl allyl ammonium chloride (TEAC) after purification, produce
Rate is 90.8%, and its reaction equation is as follows:
The performance impact that fresh water-based is starched by embodiment 6 fluid loss additive
The preparation of 4% fresh water-based slurry: add 40g bentonite in every 1000mL fresh water, add the most under agitation
2.4g natrium carbonicum calcinatum regulation pH value, to OK range, takes 400mL base slurry high-speed stirred 20min, subsequently curing in airtight condition 24h, i.e.
Obtain fresh water-based slurry.
Weighing different amounts of fluid loss additive successively, be dissolved in 400mL fresh water-based slurry, different addition of filtrate reducer is respectively prepared
Two parts, after high-speed stirred 20min, curing in airtight condition 24h, portion at room temperature flow measurement degeneration and API filtration, another part puts into rolling
In sub-stove, under the conditions of 220 DEG C, heat rolling was taken out after 16 hours, after being cooled to room temperature, tested its rheological characteristic, API filtration and height
Temperature high pressure (HTHP) filter loss.
The impact on fresh water-based slurry filtrate loss controllability of table 1 fluid loss additive
Data from table 1 are it will be seen that all of PTS series of products filtrate loss controllability in fresh water-based is starched is superior to
PDADS, the most again with the filtrate loss controllability of PTS-1 as optimum.PTS-1 can by fresh water-based starch aging front API filtration from
28.0ml is down to 5.8ml, aging after be then down to 14.2ml, HTHP filter loss from 78.4ml and be then down to 35.8ml from 129.0ml, card
Bright it possesses excellent high temperature resistance filtrate loss controllability.
The impact on fresh water-based slurry rheological characteristic of table 2 fluid loss additive
Data from table 2 are found out, along with the increase of addition of filtrate reducer, the apparent viscosity of system increases therewith, and moves
Shear force change is little, and numerical value is more or less the same, and shows that PTS series of products are provided with good proposing with PDADS in fresh water-based is starched
Stick and fresh water-based after cutting effect, and high temperature ageing, also will not be made to starch excessive adhesion-promoting, it was demonstrated that its heat-resisting property is excellent, be conducive to it deeply
Application in well drillng operation.
The impact on compound salt-water basic slurry filtration reduction of embodiment 7 fluid loss additive
The preparation of compound salt-water basic slurry: add 40g bentonite in every 1000mL fresh water, add the most under agitation
2.4g natrium carbonicum calcinatum regulation pH value, to OK range, puts into the anhydrous CaCl of 50gNaCl, 8g then2, take after fully dissolving
400mL base is starched, and high-speed stirred 20min curing in airtight condition 24h obtain compound salt-water basic slurry.
Weighing different amounts of fluid loss additive successively, be dissolved in 400mL complex salt water slurry, different addition of filtrate reducer is respectively joined
Making two parts, after high-speed stirred 20min, curing in airtight condition 24h, portion at room temperature surveys API filtration, and another part puts into roller furnace
In, under the conditions of 220 DEG C, heat rolling was taken out after 16 hours, after being cooled to room temperature, tested its API filtration and High Temperature High Pressure (HTHP)
Filter loss.
The impact on compound salt-water basic slurry filtrate loss controllability of table 3 fluid loss additive
Data from table 3 are it will be seen that PTS series and PDADS all can effectively reduce the leak-off of compound salt-water basic slurry
Amount, API with HTHP filter loss declines to a great extent with the increase of addition of filtrate reducer, but the most aging data front and back, it is known that PTS system
The filtrate loss controllability of row product is slightly better than PDADS, PTS-1 then wherein optimum filtrate loss controllability.PTS-1 can be by compound
The aging front API filtration of brine mud is down to 11.2ml from 88.0ml, aging after be then down to 19.4ml, HTHP from 122.4ml
Filter loss is then down to 51.8ml from 154.4ml, it was demonstrated that it possesses excellent temperature resistance salt tolerant filtrate loss controllability.
The impact on compound salt-water basic slurry rheological property of table 4 fluid loss additive
Data from table 4 are found out, along with the increase of addition of filtrate reducer, the apparent viscosity of compound salt-water basic slurry increases therewith
Greatly, and yield value change is little, and add PTS series of products aging with the base of PDADS slurry before and after apparent viscosity and yield value
Numerical value is closer to, and shows that PTS series of products and PDADS are provided with the good glutinous effect that carries, and height in compound salt-water basic slurry
Also the excessive adhesion-promoting of compound salt-water basic slurry will not be made, it was demonstrated that it has excellent temperature resistance and salt tolerant calcium performance concurrently after temperature is aging.
Although, the present invention is described in detail the most with a general description of the specific embodiments, but
On the basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Cause
This, these modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to the scope of protection of present invention.
Claims (10)
1. a quadripolymer, it is characterised in that this quadripolymer has a below formula structure:
Wherein, M is Na or K；A=55%～65%, b=15%～30%, c=5%～15%, d=1-a-b-c.
2. the preparation method of quadripolymer as claimed in claim 1, it is characterised in that:
Weigh eneamide, thiazolinyl propane sulfonic acid, thiazolinyl ammonium chloride and four kinds of monomers of vinyl pyrrolidone according to a certain percentage, will
Thiazolinyl propane sulfonic acid is dissolved in deionized water, and with alkaline matter by the most neutral for solution regulation, puts into thiazolinyl acyl after pouring reaction vessel into
Amine, thiazolinyl ammonium chloride and vinyl pyrrolidone, mix and blend, it is warming up to predetermined temperature after logical nitrogen deoxygenation, puts into initiator,
React to the scheduled time to take out and obtain this quadripolymer crude product；Crude product is dissolved in organic solvent, obtains after purifying
This quadripolymer sterling.
3. the preparation method of quadripolymer as claimed in claim 2, it is characterised in that:
Described eneamide is selected from acrylamide, N, N-DMAA, N, at least the one of N-acrylamide
Kind；Thiazolinyl propane sulfonic acid is selected from least one of vinyl sulfonic acid sodium or potassium, sodium allylsulfonate or potassium, sodium p styrene sulfonate or potassium；
Thiazolinyl ammonium chloride is selected from trihydroxyethyl allyl ammonium chloride, methyl dihydroxy ethyl allyl ammonium chloride and ethyl dihydroxy ethyl allyl
At least one of ammonium chloride；Vinyl pyrrolidone is selected from NVP.
4. the preparation method of quadripolymer as claimed in claim 2, it is characterised in that:
Described initiator is oxidation-reduction initiator, is made up of with reducing agent oxidant, and its consumption is polymerization monomer total amount
(0.3～0.6) wt%, wherein said oxidant is (0.5～2.0) with the mol ratio of reducing agent: 1；Wherein oxidant is selected from
At least one in potassium peroxydisulfate, Ammonium persulfate. and hydrogen peroxide, reducing agent is selected from sodium sulfite, sodium sulfite, thiosulfuric acid
At least one in sodium.
5. the preparation method of quadripolymer as claimed in claim 2, it is characterised in that: described predetermined temperature is 45～65
DEG C, the scheduled time is 5～9 hours.
6. the preparation method of quadripolymer as claimed in claim 2, it is characterised in that: the organic solvent used by purification step
For at least one of dehydrated alcohol, oxolane and acetone.
7. the preparation method of quadripolymer as claimed in claim 1, it is characterised in that specifically comprise the following steps that
(1) weighing four kinds of monomers, mol ratio is eneamide: thiazolinyl propane sulfonic acid: thiazolinyl ammonium chloride: vinyl pyrrolidone=(9
～12): (2～4): (1～3): (1～2)；
(2) thiazolinyl propane sulfonic acid is dissolved in deionized water, is neutralized to pH=7～8 with sodium hydroxide, after pouring reaction vessel into, put into alkene
Base amide, thiazolinyl ammonium chloride and vinyl pyrrolidone, mix and blend, logical nitrogen deoxygenation；
(3) logical nitrogen was warming up to 45～65 DEG C after 30 minutes, add the initiator of 0.3%～0.6wt%, total monomer is
15～30%, take out white gels shape product after reacting 5～9 hours, be this quadripolymer crude product；
(4) crude product is dissolved in the organic solvent of excess, isolates precipitate, dry and pulverize, obtain this quadripolymer sterling.
8. the monomer being used for preparing quadripolymer described in claim 1, it is characterised in that its structure is as follows:
Wherein R=-C2H4OH、-CH3Or-C2H5。
9. the preparation method of the monomer for preparing described quadripolymer as claimed in claim 8, it is characterised in that include
Following steps:
(1) weighing hydramine and chloropropene, mol ratio is hydramine: chloropropene=(2～4): (1～3)；
(2) both pour reaction vessel into, mix and blend, logical nitrogen is warming up to 40～60 DEG C after 30 minutes, reacts 4～9 hours
Rear taking-up thick liquid, is monomer crude product；
(3) monomer crude product is dissolved in the mixed organic solvents of excess, through being recrystallized to give white sticky paste, stands laggard
Row decompression sucking filtration, drying i.e. obtains described monomer sterling after pulverizing.
10. the quadripolymer described in claim 1 is used for the water-base drilling fluid application of temperature resistance salt tolerant polymer filtrate reducer.
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| CN201610364238.1A CN106046251B (en) | 2016-05-26 | 2016-05-26 | Water-base drilling fluid temperature resistance salt tolerant polymer filtrate reducer and preparation method thereof |
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| CN106632845A (en) * | 2016-12-19 | 2017-05-10 | 天津中油渤星工程科技有限公司 | Preparation method of anti-dispersion flocculant for oil well cement |
| CN108484829A (en) * | 2018-04-19 | 2018-09-04 | 中国石油大学(北京) | It is suitable for partial hydrolysis acrylamide copolymer and water-base drilling fluid and its application of high temperature resistance supermolecule coating agent |
| CN108641683A (en) * | 2018-03-30 | 2018-10-12 | 中国石油大学(华东) | A kind of high temperature resistance high salinity high-density water-based drilling fluid and its application |
| CN108949124A (en) * | 2018-09-06 | 2018-12-07 | 克拉玛依市恒祥科技有限责任公司 | A kind of gel forming polymer and preparation method thereof, polymer weak gel drilling fluid |
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| CN106632845A (en) * | 2016-12-19 | 2017-05-10 | 天津中油渤星工程科技有限公司 | Preparation method of anti-dispersion flocculant for oil well cement |
| CN106632845B (en) * | 2016-12-19 | 2019-03-19 | 天津中油渤星工程科技有限公司 | A kind of preparation method of the anti-dispersing flocculants of oil-well cement |
| CN108641683A (en) * | 2018-03-30 | 2018-10-12 | 中国石油大学(华东) | A kind of high temperature resistance high salinity high-density water-based drilling fluid and its application |
| CN108641683B (en) * | 2018-03-30 | 2019-05-24 | 中国石油大学(华东) | A kind of high salinity high-density water-based drilling fluid resistant to high temperatures and its application |
| CN108484829A (en) * | 2018-04-19 | 2018-09-04 | 中国石油大学(北京) | It is suitable for partial hydrolysis acrylamide copolymer and water-base drilling fluid and its application of high temperature resistance supermolecule coating agent |
| CN108484829B (en) * | 2018-04-19 | 2019-02-26 | 中国石油大学(北京) | It is suitable for partial hydrolysis acrylamide copolymer and water-base drilling fluid and its application of supermolecule coating agent resistant to high temperatures |
| CN108949124A (en) * | 2018-09-06 | 2018-12-07 | 克拉玛依市恒祥科技有限责任公司 | A kind of gel forming polymer and preparation method thereof, polymer weak gel drilling fluid |
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