CN106008844B - A kind of strong rejection capability high temperature oil well cement retarder and preparation method thereof - Google Patents
A kind of strong rejection capability high temperature oil well cement retarder and preparation method thereof Download PDFInfo
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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
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/10—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of amides or imides
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/161—Macromolecular compounds comprising sulfonate or sulfate groups
- C04B24/163—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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
- C08F220/58—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine
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- 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/20—Retarders
- C04B2103/22—Set retarders
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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
- C08F220/58—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine
- C08F220/585—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine and containing other heteroatoms, e.g. 2-acrylamido-2-methylpropane sulfonic acid [AMPS]
Abstract
The present invention relates to a kind of strong rejection capability high temperature oil well cement retarders and preparation method thereof.Mainly solve the problems, such as that existing cement slurry Hydrochemical Anomalies, the linear mutation of thickening and thickening time are short.Its component of the oil well cement retarder and proportion are as follows by weight percentage：Itaconic acid is 1.22%, 2- acrylamide-2-methylpro panesulfonic acid is 6.63%, acrylic acid 4.61%, sodium styrene sulfonate 4.54%, initiator 0.085%, remaining is deionized water；Preparation method includes the following steps：The first step prepares high polymer main chain；Second step prepares graft copolymer.The strong rejection capability high temperature oil well cement retarder, it can be realized the control to cement slurry thickening time, the linear mutation such as guarantee in 90 DEG C~150 DEG C temperature ranges thickening curve simultaneously and there is no " bulge " and walk " step ", meets cementing operation needs under complex geological condition.
Description
Technical field
The present invention relates to the oil well cement additives being drilled in well and well cementation field in oilfield development process, especially a kind of
Strong rejection capability high temperature oil well cement retarder and preparation method thereof.
Background technique
As domestic and international each elephant is to the pay attention to day by day of the resources explorations such as unconventional oil and gas, deep-seated gas, deep-well surpasses
Deep drilling exploration quantity is continuously increased, and the requirement to oil well cement paste also will be further harsh.When oil/gas well cementing job, cement slurry
It first passes through casing and is pumped into shaft bottom, return to well on the annular space then formed again via casing and casing or casing and wellbore
Mouth or predetermined position, to achieve the purpose that insulate reservoir and protection sleeve pipe.In the process, as the oil of hydraulic cementing materials
Well cement again can be with the continuous aquation of its internal active material and consistency rises, mobility is deteriorated, finally not pumpable.Deep-well
When well cementation, the time needed for cement slurry pumping procedure will also be increase accordingly, in addition the raising of bottom hole temperature (BHT), pressure, the water of cement
Change speed than further speeding up when room temperature.Therefore, slow down the hydration rate of oil-well cement using retarder, be accurately controlled water
The thickening time of mud makes it remain liquid pumpable state in displacement process, avoid bridge blinding, and does not influence comprehensive
Can, it has important practical significance to guaranteeing that cementing operation is safe and improves cementing quality.
Although existing oil well cement retarder kind is more, such as low molecular weight cellulose class, lignin, carbohydrate,
The using effect of (90 DEG C~150 DEG C) is not good enough in high temperature section, it is perfect to need.Most of retarder intramolecular chemical key
It is weak, homogenieity is poor, using temperature be higher than 90 DEG C after be easy by thermal failure, lose deferred action.Meanwhile oil-well cement at 110 DEG C
Hydration reaction start difference occur, C-S-H gelling is no longer stabilized, delay effect and water of these variations to retarder
The comprehensive performance of mud system can all generate large effect.In the case, the dosage of some retarder products and when thickening
Between between exponent function relation developed by linear relationship, the usage amount that meets under the conditions of safe construction increased dramatically, using such water
When mud system progress long well section well cementation, it is easy so that the oil-well cement appearance at the top of long envelope section, in lower temperature region is too slow
Coagulation phenomena, to cause cement slurry bad stability, casing and high concentration salt solutions time of contact to increase, stratum soaking time becomes
The harm such as long, leads to the delay of subsequent construction and the increase of channelling risk.Separately there are some retarder Product Activities to get higher, cement slurry
Performance is extremely sensitive to the response fluctuation of its dosage, and the difference of some thousandths of can make thickening time difference huge, lower than reasonable
May cause when dosage rush it is solidifying or not slow setting and while being higher than, will lead to cement slurry and not coagulate；It is easy to stir because making up a prescription when practical application
The problems such as mixing uneven and container wall built-up residual makes the bad reproducibility of thickening time, increase previous experiments workload and medical fluid mixed
With difficulty, the incorporation of formation fluid may also lead to the reduction of product design, increase " plant flag bar " during cementing operation
Risk.Though also being easy in 110 DEG C~130 DEG C sections in addition, portioned product has retarding effect in this temperature range
The unusual fluctuations phenomenon of the linear mutation of the thickening such as existing " bulge ", " step ", has an impact to performances such as the rheologies of cement slurry, it is difficult to full
The needs of cementing operation under sufficient complex geological condition.
In conclusion high temperature section of the existing oil well cement retarder at 90~150 DEG C, especially hydrated cementitious are anti-
Should occur there is certain defect or deficiency mostly in 110~130 DEG C of sections of difference, being unfavorable for cementing operation safety and oil gas
The development and utilization of resource.Meanwhile People's Republic of China (PRC) oil and gas industry standard SY/T 5504.1-2013《Oil-well cement
Additive evaluation method part 1：Retarder》Show mating cement slurry (the density 1.90g/cm added with ideal retarder3
±0.01g/cm3) should have initial consistency≤30Bc, the linear mutation value≤10Bc of thickening, the performances such as the thickening time is adjustable.
Summary of the invention
When the invention reside in overcoming existing cement slurry Hydrochemical Anomalies present in background technique, the linear mutation of thickening and thickening
Between short problem, and provide a kind of strong rejection capability high temperature oil well cement retarder.The strong rejection capability high temperature oil-well cement is slow
Solidifying agent can be realized the control to cement slurry thickening time, while guarantee there is no thickening curve in 90 DEG C~150 DEG C temperature ranges
The linear mutation such as " bulge " and " step ", meets cementing operation needs under complex geological condition.The present invention also provides a kind of strong
The preparation method of inhibition high temperature oil well cement retarder.
The present invention solves the problems, such as that it can reach by following technical solution：A kind of strong rejection capability high temperature oil-well cement is slow
Solidifying agent, component and proportion are as follows by weight percentage：Itaconic acid is 1.22%, 2- acrylamide-2-methylpro panesulfonic acid is
6.63%, acrylic acid 4.61%, sodium styrene sulfonate 4.54%, initiator 0.085%, remaining is deionized water.
The present invention also provides a kind of preparation methods of strong rejection capability high temperature oil well cement retarder, include the following steps：
The first step, the preparation of high polymer main chain：
(1) it according to mass ratio, weighs itaconic acid (IA) and 2- acrylamide-2-methylpro panesulfonic acid (AMPS) is put into reaction
In device, deionized water is added, stirs evenly；
(2) it weighs acrylic acid and pours into reactor, stir evenly；
(3) solution ph is adjusted to 7~8；
(4) a certain amount of deionized water is supplemented, so that the solid content of activated monomer is 15wt% in solution；
(5) it is passed through nitrogen (N2) and start stirring, 50 DEG C of reaction temperature are warming up to, continues to stir after temperature is constant；
(6) initiator is added, keeps the temperature, be stirred to react；
(7) after being cooled to room temperature, solution by portions obtained will be reacted and be added gradually in a certain amount of acetone, filtering precipitating
Product is high polymer main chain material, spare after dry；
Second step, the preparation of graft copolymer：
(1) high polymer main chain material and sodium styrene sulfonate after drying are weighed according to mass ratio, be added in deionized water
It is sufficiently stirred；
(2) it weighs acrylic acid and pours into reactor, stir evenly；
(3) solution ph is adjusted to 7~8；
(4) a certain amount of deionized water is supplemented, so that the solid content of reaction raw materials is 17wt% in solution；
(5) it is passed through N2And stirring is started, 50 DEG C of reaction temperature are warming up to, continues to stir after temperature is constant；
(6) initiator is added, keeps the temperature, be stirred to react；
(7) it is cooled to room temperature, discharges, acquired solution is strong rejection capability high temperature oil well cement retarder.
The present invention can have the advantages that compared with above-mentioned background technique：The strong rejection capability high temperature oil-well cement
Retarder, by surface graft copolymerization, functional group steric hindrance is big, that rigidity is strong and with certain electrostatic repulsion introduces tool
Have on resistant to high temperatures, slow setting effect high polymer main chain, the high temperature oil well cement retarder of strong rejection capability has been made, has changed biography
The single linear molecular structure of system polymer retarder, the inward turning indexing increased when Molecular connectivity indices change build, reduce polymerization
Winding degree and viscosity change of the object molecule in high temperature, so that inhibiting cement slurry to tie up to 110 DEG C~130 DEG C may produce
The linear jumping phenomenon of the thickening such as raw " bulge ", " step ".The retarder is suitable for each rank oil-well cement, and has just thick
Feature low, the thickening time is adjustable, dosage susceptibility is small, thickening curve is normal, 40Bc~100Bc transit time is short, Neng Gou
The pumpable time effectively slowed down hydrated cementitious speed within the scope of 90 DEG C~150 DEG C, accurately control cement slurry, replacing it
Liquid pumpable state is remained in journey, avoids the construction risks such as bridge blinding, while not influencing the comprehensive performance of cement slurry again.Cause
This, the exploitation of the retarder, the reliability using to raising high temperature mortar architecture, reduction experimental work amount and medical fluid mixture
Difficulty, guarantee cementing operation safely, improve cementing quality, meet deep-well and ultra-deep well drilling speed-raising require important reality
Meaning.
Detailed description of the invention
The thickening of cement slurry is bent when attached drawing 1 is cement retarder dosage 2.70% of the present invention under the conditions of 90 DEG C × 53.3MPa
Line；
The thickening of cement slurry is bent when attached drawing 2 is cement retarder dosage 2.97% of the present invention under the conditions of 90 DEG C × 53.3MPa
Line；
The thickening of cement slurry is bent when attached drawing 3 is cement retarder dosage 4.50% of the present invention under the conditions of 110 DEG C × 67.0MPa
Line；
The thickening of cement slurry is bent when attached drawing 4 is cement retarder dosage 4.95% of the present invention under the conditions of 110 DEG C × 67.0MPa
Line；
The thickening of cement slurry is bent when attached drawing 5 is cement retarder dosage 7.30% of the present invention under the conditions of 130 DEG C × 80.7MPa
Line；
The thickening of cement slurry is bent when attached drawing 6 is cement retarder dosage 8.03% of the present invention under the conditions of 130 DEG C × 80.7MPa
Line；
The thickening of cement slurry is bent when attached drawing 7 is cement retarder dosage 9.70% of the present invention under the conditions of 150 DEG C × 94.4MPa
Line；
The thickening of cement slurry when attached drawing 8 is cement retarder dosage 10.67% of the present invention under the conditions of 150 DEG C × 94.4MPa
Curve.
Specific embodiment：
The invention will be further described below in conjunction with the accompanying drawings and the specific embodiments：
Prepare strong rejection capability high temperature oil well cement retarder：
The first step, the preparation of high polymer main chain：
(1) according to mass ratio, 3.6 parts of itaconic acids (IA) and 19.5 parts of 2- acrylamide-2-methylpro panesulfonic acids are weighed
(AMPS) it is put into reactor, 100 parts of deionized water is added, stirs evenly；
(2) 7.3 parts of acrylic acid (AA) are weighed and pour into reactor, are stirred evenly；
(3) solution ph is adjusted to 7~8 with NaOH；
(4) a certain amount of deionized water is supplemented, so that the solid content of activated monomer is 15wt% in solution；
(5) it is passed through nitrogen (N2) and start stirring, 50 DEG C of reaction temperature are warming up to, continues to stir 30min after temperature is constant；
(6) initiator ammonium persulfate (APS) is added, keeps the temperature, is stirred to react 6~8h；
(7) after being cooled to room temperature, solution by portions obtained will be reacted and be added gradually in a certain amount of acetone (Ac), filtered
Precipitated product is high polymer main chain material, spare after dry.
Second step, the preparation of graft copolymer：
(1) according to mass ratio, high polymer main chain material and 7.9 parts of sodium styrene sulfonate (SSS) after weighing 18 parts of dryings,
It is added in 100 parts of deionized waters and is sufficiently stirred；
(2) 3.7 parts of AA are weighed and pour into reactor, are stirred evenly；
(3) solution ph is adjusted to 7~8 with NaOH；
(4) a certain amount of deionized water is supplemented, so that the solid content of reaction raw materials is 17wt% in solution；
(5) it is passed through N2And stirring is started, 50 DEG C of reaction temperature are warming up to, continues to stir 30min after temperature is constant；
(6) initiator A PS is added, keeps the temperature, be stirred to react 6~7h；
(7) it is cooled to room temperature, discharges, acquired solution is strong rejection capability high temperature oil well cement retarder.
Following example is the cement slurry prepared using the cement retarder, the major experimental instrument that following example uses
Have：30-60 type watt rib blender, 7025 type high temperature and pressure multiviscosity meters, 1910 high temperature and pressure protective cauldrons, CHANDLER company of the U.S.
Product.
Raw material used in experimentation have：G grades of oil-well cements of high sulfate resisting type (HSR), Dalian Cement Group have
The production of limit company；Quartz sand, 200 mesh, macro profit quartzy silicon powder Co., Ltd；Retarder and distilled water of the present invention.
Embodiment 1
Testing program parameter is：90 DEG C of test temperature, test pressure 53.3MPa, heating-up time 49min.
Cement-slurry method is：G grades of oil-well cement+21.6g retarder of the present invention of 800g (account for oil-well cement weight
2.7wt%)+330.4g water.Cement slurry density is 1.90 × 103kg/m3, experimental result is shown in attached drawing 1 and tables 1.
Embodiment 2
Testing program：110 DEG C of test temperature, test pressure 67.0MPa, heating-up time 57min.
Cement-slurry method is：G grades of oil-well cement+210g quartz sand+27g retarder of the present invention of 600g (account for oil-well cement weight
The 4.5wt% of amount)+309g water.Cement slurry density is 1.90 × 103kg/m3, experimental result is shown in attached drawing 3 and tables 1.
Embodiment 3
Testing program：130 DEG C of test temperature, test pressure 80.7MPa, heating-up time 65min.
Cement-slurry method is：G grades of oil-well cement+210g quartz sand+43.8g retarder of the present invention of 600g (account for oil-well cement
The 7.3wt% of weight)+292.2g water.Cement slurry density is 1.90 × 103kg/m3, experimental result is shown in attached drawing 5 and tables 1.
Embodiment 4
Testing program：150 DEG C of test temperature, test pressure 94.4MPa, heating-up time 73min.
Cement-slurry method is：G grades of oil-well cement+210g quartz sand+58.2g retarder of the present invention of 600g (account for oil-well cement
The 9.7wt% of weight)+277.8g water.Cement slurry density is 1.90 × 103kg/m3, experimental result is shown in attached drawing 7 and tables 1.
The evaluation of 1 embodiment basic performance of table
By above-mentioned test data it is found that with test temperature increase, cement slurry meets oil and gas industry standard
(SY/T 5504.1-2013《Oil well cement additive evaluation method part 1：Retarder》) in correspond to the thickening time require when
Required retarder dosage of the present invention also increases with it.Under 90 DEG C × 53.3MPa experimental condition, retarder dosage of the present invention
When 2.7wt% (with oil-well cement weight ratio), just thick is only 12Bc, the effective pumping for being conducive to cement slurry；Thickening time reaches
268min, curve are normal and without packet, can effectively ensure that the pumpable time of slurry；40Bc~100Bc transit time
13min is beneficial to the anti-of raising oil/gas well and alters packing ability, reduces channelling risk；Free liquid 0.2%, for 24 hours compression strength
25.3MPa meets Industry code requirements；When dosage raising 10% reaches 2.97wt%, the thickening time extends 60min, dosage
Susceptibility is 22.39% (being detailed in attached drawing 2), and curve is normal, without packet, and transit time is short, illustrates the retarder in this temperature spot
Locate function admirable, safe and reliable.In apparent 110 DEG C and 130 DEG C of hydrated cementitious difference performance, added with strong rejection capability high temperature oil
Thick < 20Bc at the beginning of the mortar architecture of well cement retarder, the thickening time is long, and curve is normal, without mutation, 40Bc~100Bc transition
Time is short, and dosage susceptibility is reduced to 18% or less (being detailed in attached drawing 4, attached drawing 6).Retarder at 150 DEG C, in mortar architecture
Dosage reaches 9.7wt% (with oil-well cement weight ratio), just it is thick it is low, the thickening time is long, thickening curve smoothing, 40Bc~100Bc
Transit time is only 5min, and dosage susceptibility is also only 10.7% (being detailed in attached drawing 8).
Therefore, the strong rejection capability high temperature oil well cement retarder, solve puzzlement oilfield development process in be drilled well and
The problem of cement slurry Hydrochemical Anomalies of well cementation field many years, thickening are mutated, surveys the resources such as domestic and international unconventional oil and gas, deep-seated gas
Visiting exploitation and the improvement of deep-well, ultradeep well packing effect, cementing quality has important economic value and social effect.
Strong rejection capability high temperature oil well cement retarder of the invention is suitable for 90~150 it can be seen from data in table 1
DEG C, cement slurry thickening time is long, and first thick < 20Bc is thickened linear good, the linear mutation value≤5Bc of curve, without " packet ", " platform
The jumping phenomenons such as rank ", 40Bc~100Bc transit time are no more than 20min, fluidity > 24cm, dosage susceptibility < 23%, trip
Chaotropic < 0.2%, for 24 hours compression strength > 24MPa.Illustrating product of the present invention not only has effects that good delay, slow setting simultaneously,
Oil-well cement also can be effectively suppressed the problem of the Hydrochemical Anomalies in high temperature section, thickening are mutated, workability is good, intensity is sent out
It educates fast, can satisfy cementing operation needs under deep-well, ultradeep well and complex geological condition.
Claims (2)
1. a kind of strong rejection capability high temperature oil well cement retarder, component and proportion are as follows by weight percentage：Itaconic acid is
1.22%, 2- acrylamide-2-methylpro panesulfonic acid be 6.63%, acrylic acid 4.61%, sodium styrene sulfonate 4.54%,
Initiator is 0.085%, remaining is deionized water,
Preparation method includes the following steps：
The first step, the preparation of high polymer main chain：
(1) according to mass ratio, weigh itaconic acid and 2- acrylamide-2-methylpro panesulfonic acid be put into reactor, addition go from
Sub- water, stirs evenly；
(2) it weighs acrylic acid and pours into reactor, stir evenly；
(3) solution ph is adjusted to 7~8；
(4) a certain amount of deionized water is supplemented, so that the solid content of activated monomer is 15wt% in solution；
(5) it is passed through nitrogen and starts stirring, be warming up to 50 DEG C of reaction temperature, continue to stir after temperature is constant；
(6) initiator is added, keeps the temperature, be stirred to react；
(7) after being cooled to room temperature, solution by portions obtained will be reacted and be added gradually in a certain amount of acetone, precipitated product is filtered
As high polymer main chain material, it is spare after dry；
Second step, the preparation of graft copolymer：
(1) high polymer main chain material and sodium styrene sulfonate after drying are weighed according to mass ratio, be added in deionized water sufficiently
Stirring；
(2) it weighs acrylic acid and pours into reactor, stir evenly；
(3) solution ph is adjusted to 7~8；
(4) a certain amount of deionized water is supplemented, so that the solid content of reaction raw materials is 17wt% in solution；
(5) it is passed through N2And stirring is started, 50 DEG C of reaction temperature are warming up to, continues to stir after temperature is constant；
(6) initiator is added, keeps the temperature, be stirred to react；
(7) it is cooled to room temperature, discharges, acquired solution is strong rejection capability high temperature oil well cement retarder.
2. a kind of strong rejection capability high temperature oil well cement retarder according to claim 1, it is characterised in that：The initiation
Agent is ammonium persulfate；The solution ph is adjusted with NaOH solution.
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| CN109503781B (en) * | 2017-09-14 | 2021-05-04 | 中石化石油工程技术服务有限公司 | Inorganic-organic polymer oil well cement retarder, and preparation method and application thereof |
| CN107699216A (en) * | 2017-09-27 | 2018-02-16 | 中国石油天然气集团公司 | Gas storage well cement slurry |
| CN107963828A (en) * | 2017-11-07 | 2018-04-27 | 常州布奇纺织有限公司 | A kind of preparation method of high temperature resistant type compound retarder |
| CN112724413A (en) * | 2021-01-08 | 2021-04-30 | 西南石油大学 | Preparation method of temperature-sensitive tackifying type suspending agent for well cementation cement slurry |
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Address after: 100007, Oil Mansion, No. 9, North Main Street, Beijing, Beijing, Dongzhimen, Dongcheng District Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: DAQING PETROLEUM ADMINISTRATION Co.,Ltd. Address before: 100007, Oil Mansion, No. 9, North Main Street, Beijing, Beijing, Dongzhimen, Dongcheng District Patentee before: China National Petroleum Corp. Patentee before: DA QING PETROLEUM ADMINISTRATION BUREAU |
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