CN106349428A - Preparation method of acidically-decomposable high-temperature-resistant gel blocking agent - Google Patents
Preparation method of acidically-decomposable high-temperature-resistant gel blocking agent Download PDFInfo
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- CN106349428A CN106349428A CN201610733691.5A CN201610733691A CN106349428A CN 106349428 A CN106349428 A CN 106349428A CN 201610733691 A CN201610733691 A CN 201610733691A CN 106349428 A CN106349428 A CN 106349428A
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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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/516—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls characterised by their form or by the form of their components, e.g. encapsulated material
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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 invention relates to a preparation method for preparing an acidically-decomposable high-temperature-resistant gel blocking agent by adopting modified bentonite as a raw material. The preparation method comprises two portions, i.e. modification of bentonite and preparation of gel blocking agent. Specifically, the preparation method comprises the following steps: modifying the bentonite by using sodium hydroxide, Na2CO3 and water, mixing the modified bentonite, acrylamide, 2-acrylamide-2-methyl propyl sulfonic acid, non-ion surfactant, a cross-linking agent and an initiator, and performing the reaction under certain conditions, thus obtaining the gel blocking agent. The preparation method has the beneficial effects that the strength, the flexibility and the water-absorption expansion capacity are good, the performance can be maintained in an environment of 150 DEG C, and the gel has an acidic decomposition property that is not possessed by other gel blocking materials. The gel blocking agent can be acidically decomposed both in a hydrochloric acid solution and a hydrofluoric acid solution, the higher the temperature is, the higher the decomposition speed is, and the broken-down performance is good.
Description
Technical field
The present invention relates to a kind of prepare acidificable breakdown type high temperature resistance gel plugging agent with modified bentonite for raw material
Preparation method.
Background technology
At present, during gel plugging agent is widely used in well workover or the drilling leakage blockage in oil field, due to its
In special environment, therefore it is required that it has good high temperature resistant property, high resiliency, high intensity, water absorption and decomposability
Etc. many performances.And the performance of domestic and international at present invented gel plugging agent all has short slab, thus affect overall performance and
Service life.
As: periodical (development of GEL USED FOR PLUGGING WELL LOST CIRCULATION and application [j]. Henan oil, 1998,12 (5): 23- 26.) in public
That opens is modified using Rhizoma amorphophalli powder, forms the gel of a kind of high viscoelasticity and some strength.Bohai Oil Corporation utilizes this to coagulate
Glue sealing agent prepares compounding use with bridging-off agent f, by kill-job leak stopping of the severe circulation loss success of sz-36-1 Jing3128mChu.
But this GEL USED FOR PLUGGING WELL LOST CIRCULATION is higher to temperature requirement, effective gel when temperature is relatively low, can not be formed, when temperature is more than 120 DEG C,
Gel strength can reduce again, so general use between 80-120 DEG C.
As: periodical (blowout leakage in double mausoleums 1 is with the process [j] depositing complex hole condition. gas industry, 2007,27 (1): 60-
63.) the domestic Southwest Petroleum Institute disclosed in develops the special gel that a kind of code name is znd-2, the maximum of this gel
Feature is that it has excellent shear thinning behavior, (about 7s at low shear rates-1) can be associated by intramolecular hydrogen bond, produce
Up to 1 × 104～3 × 104The viscosity of mpa s, at high shear rates (about 1000s-1) then there is good mobility
(viscosity 50～100mpa s).This sealing agent can be very good in drop ply be detained, formed have certain viscosity, elasticity,
Intensity and the gel slug of structure.And this special gel can be matched with cement mortar, for drain spray with layer drop ply, Xu
Deep 8- puts down more than the 30 mouthful of severe mud losses wells such as 1, sieve family 2 and all achieves good effect of field application.This special gel
Maximum operation (service) temperature is 125 DEG C, destructurized formation " soybean curd shape " material under strong acidic environment, but is not acidified
Decompose, there is a problem of that anti-row is difficult.
In sum, current gel-like loss circulation material is varied, but two problems of generally existing, and first is high temperature resistance
Effect is not good, and using temperature generally between 90-120 DEG C, it is higher that this makes the blocking agent of gel-like may not apply to temperature
Stratum, range is significantly limited；Two is as most sealing agent, is difficult de-plugging, is not suitable for oil-gas Layer leak stopping.
Content of the invention
The present invention is adopted the technical scheme that to solve above-mentioned technical problem:
A kind of preparation method of acidificable breakdown type high temperature resistance gel plugging agent, it is by the raw material reaction life of following weight portion
The cross-linked gel becoming:
A, mass fraction are 25% bentone soil paste 40 ~ 50 weight portion；
B, acrylamide (am) 2 ~ 6 weight portion；
C, 2- acrylamide-2-methylpro panesulfonic acid (amps) 8 ~ 12 weight portion；
D, high-temperature stabilizer 1 ~ 5 weight portion；
E, nonionic surfactant 3 ~ 5 weight portion；
F, initiator 0.01 ~ 0.03 weight portion；
G, cross-linking agent 0.03 ~ 0.05 weight portion；
Its preparation process is as follows:
(1) raw material a, b and c are added and carry out in reactor being sufficiently stirred for dissolving, and adjust ph value to neutrality；
(2) raw material d and e is added in reactor and stir；
(3) raw material f and g is added in reactor and be placed on 60 DEG C of water bath with thermostatic control heating；
(4) product is taken out and cut into fritter, be placed in after being cleaned with water in 90 DEG C of environment and dry, before use will using pulverizer
It is milled to desired particle size.
In above-mentioned reaction, modified alta-mud in described bentone soil paste is anti-by the raw material of following weight portion
Should generate:
H, sodium hydroxide 1 ~ 2 weight portion；
I, sodium carbonate 2 ~ 5 weight portion；
J, bentonite 7 ~ 12 weight portion；
K, water, balance of water；
Its preparation process is as follows:
(1) raw material h, i and k are added in reaction vessel and be warming up to 80 ~ 90 DEG C under stirring；
(2) raw material j is added in described reaction vessel and is kept stirring for state, be warming up to 100 DEG C after having added and keep
For a period of time；
(3) stop heating and being cooled to room temperature after the completion of reacting, take out product cleaning and be dried, obtain final product described modified alta-mud.
In the above-mentioned reaction preparing acidificable breakdown type high temperature resistance gel plugging agent, its step is by hydrogen-oxygen in (1)
Change sodium and be adjusted ph value.
In the above-mentioned reaction preparing acidificable breakdown type high temperature resistance gel plugging agent, described nonionic surfactant is excellent
Elect as span-80.
Heating in water bath in the above-mentioned reaction preparing acidificable breakdown type high temperature resistance gel plugging agent, in its step (3)
Time be 4.5 ~ 5.5 hours, preferably 5 hours.
Drying time in the above-mentioned reaction preparing acidificable breakdown type high temperature resistance gel plugging agent, in its step (4)
For 8.5 ~ 9.5 hours, preferably 9 hours.
In the above-mentioned reaction preparing modified alta-mud, be warming up in its step (2) after 100 DEG C keep time be 3.5 ~
4.5 hours, preferably 4 hours.
It should be noted that oil well and drilling leakage blockage are used for by sealing agent prepared by present method invention.
In the R＆D process of the technical program, because main polymer chain has high temperature resistant feature, therefore select monomer am
Making the main chain of product with amps polymerization is the effect that " c-c " plays high temperature resistance.Strong and resistance to due to containing hydrophilic ability in amps
The sulfonic group of high temperature, introducing this group in polymer can make polymer chain remain at high temperature keep extended position；Closing
Add special modified alta-mud during one-tenth, intensity and the imbibition ability of product can be increased；Building-up process adds
Enter surfactant sp80, the outside proper alignment of its hydrophobic group can reduce the friction between macromole, be conducive to improving
The toughness of gel and elastic force, and its hydrophilic group then increased the hydrophilicity of gel；In system, addition high-temperature stabilizer can
To stop the thermal oxidative degradation of polymer, to improve its high temperature resistance.
To sum up, the invention has the beneficial effects as follows:
Gel prepared by the present invention can 150 DEG C of high temperature resistance, 12 times of imbibition, more than 5 times of draw ratio, there is certain deformation
Property.Compared with conventional Gelling Plugging Agent, while ensureing that it has sufficient intensity, toughness and imbibition ability, high temperature resistance
Ability improves 30 DEG C.
In addition, this gel has the acidifying decomposability that other gel-like plugging materials do not possess.In hydrochloric acid and Fluohydric acid.
Solution in, all can be acidified decomposition, temperature is higher, and decomposition rate is faster, there is good de-plugging performance.
Brief description
Fig. 1 is the thermal gravimetric analysis curve figure of the gel plugging agent of the present invention；
Fig. 2 is the photo before the sealing agent imbibition of the present invention；
Fig. 3 is the photo at 150 DEG C, after aging 16 hours for the sealing agent of the present invention；
Fig. 4 be the present invention sealing agent stretch in pullling test before with ruler contrast photo；
Fig. 5 be the present invention sealing agent stretch in pullling test in ruler contrast photo；
Fig. 6 be the present invention sealing agent stretch in pullling test after with ruler contrast photo；
Fig. 7 be the sealing agent of the present invention at 100 DEG C, sealing agent molten front photo of acid in hf solution；
Fig. 8 be the present invention sealing agent at 100 DEG C, sealing agent in hf solution acid molten after photo；
Fig. 9 be the sealing agent of the present invention at 100 DEG C, sealing agent molten front photo of acid in hcl solution；
Figure 10 be the present invention sealing agent at 100 DEG C, sealing agent in hcl solution acid molten after photo.
Specific embodiment
Embodiment 1
A kind of preparation method of acidificable breakdown type high temperature resistance gel plugging agent, mainly includes two parts, one is that bentonite is entered
Row is modified；Two is to prepare gel plugging agent.
As follows to alta-mud modification method:
Weigh the sodium hydroxide of 1～3 weight portion, 2～5 weight portion na2co3, balance of water, it is added in reaction vessel, stirring
Mix and under state, be warming up to 80 DEG C～90 DEG C.The bentonite weighing 7～12 weight portions is slowly added in described reaction vessel, adds
During be kept stirring for state, be warming up to 100 DEG C after the completion of addition, react 4 h at 100 DEG C.After reaction terminates, it is cooled to
Room temperature, reactant is carried out drying, obtains final product modified alta-mud.
The preparation method of gel plugging agent is as follows:
(1) described modified alta-mud is configured to the bentone soil paste that mass fraction is 25%, takes the described of 40～50 weight portions
Bentone soil paste, is added thereto to the acrylamide (am) of 2～6 weight portions and the 2- acrylamido -2- of 8～12 weight portions
Methyl propane sulfonic acid (amps) is sufficiently stirred for dissolving, and adjusts ph to neutrality with naoh；
(2) high-temperature stabilizer of 1～5 weight portion and the nonionic table of 3～5 weight portions are added in above-mentioned neutral mixed solution
Face activating agent sp80, stirs；
(3) initiator of 0.01～0.03 weight portion and the cross-linking agent of 0.03～0.05 weight portion are added in step (2) solution,
Reaction unit is placed in 5 hours of 60 DEG C of water bath with thermostatic control reacting by heating；
(4) above-mentioned product is taken out, product is cut into suitable size, be dried 9 hours in 90 DEG C of baking oven after being cleaned with water, make
It is milled down to required granularity with front pulverizer.
In order to verify the heat stability of the gel plugging agent prepared by the present invention, thermogravimetric-means of differential scanning calorimetry is carried out to it
Analytic process (tga-dsc) is tested, experimental condition: temperature range: 25 ~ 700 DEG C；Heating rate is 10.00 DEG C/min；Atmosphere
Flow is 30ml/min.The thermal gravimetric analysis curve figure obtaining is accompanying drawing 1, it is analyzed it can be observed that
0-210 DEG C: this stage thermal weight loss speed is very gentle, after a small amount of moisture that main cause is remaining in polymer is heated
Evaporation.
210-320 DEG C: due to presence-so in molecular structure3 2-、-conh2Etc. strong hydrophilic group, these groups and environment
In hydrone interaction formation combine water, in conjunction with water be heated situation volatilization lead to this stage to be very faint heat absorption
Journey, the speed of thermal weight loss is also slow.
320-372 DEG C: in the environment of being heated ,-conh2Proceed by thermal decomposition, but decomposition rate is slow, for inhaling
Thermal response.Meanwhile, sealing agent starts to melt, and melting process releases substantial amounts of heat, and intensity is greater than thermal decomposition, and result shows
For heat release.Hereafter ,-conh2Decomposition accelerate, show as a sharp endothermic peak in collection of illustrative plates, and paddy peak be collection of illustrative plates
Minimum.
372-620 DEG C: the sulfonic acid group in this stage polymer proceeds by thermal decomposition, heat decomposition curve is also relatively steeper
High and steep.And block the partial side-chain in agent molecule to also begin to rupture.
620-700 DEG C: sealing agent molecular backbone starts to decompose.
By analysis, the sealing agent prepared by the present invention has good heat-resisting property.
In order to verify the high temperature resistant property of the gel plugging agent of present invention preparation further, it is carried out with senile experiment, real
Testing step is: takes desiccant gel sealing agent and the 100g water of the 5g present invention, is added in high temperature ageing tank, in roller heating stove
Roll aging 16h, aging temperature is 150 DEG C.After experiment terminates, it is cooled to room temperature, take out gel plugging agent, observe its form,
Wherein, accompanying drawing 2 is the photo before the imbibition of this sealing agent；Accompanying drawing 3 be this sealing agent at 150 DEG C, after aging 16 hours
Photo.Instrument in above-mentioned experiment is: high temperature ageing tank, xgrl-4 roller heating stove.
Carrying out, by accompanying drawing 2 and accompanying drawing 3, the conclusion that paired observation can draw is: sealing agent particulate water absorbent expand before its color
For russet, in irregular shape；In irregular shape after 16 hours of heat rolling at 150 DEG C, and viscoelasticity is found relatively by touching
Good.
In order to verify the tensile strength of the gel plugging agent of present invention preparation, it is carried out pullling test, to imbibition
Inventive gel afterwards carries out tensile deformation, and wherein, Fig. 4 is the front comparison diagram with ruler of stretching；Fig. 5 be stretching in ruler
Comparison diagram；Fig. 6 is comparison diagram with ruler after stretching.Can observe and draw, this sealing agent draw ratio after weathering is up to 5
More than times, external force almost can return to original state after removing, and illustrates that the toughness of sealing agent is fabulous.
One big advantage of the gel plugging agent of the present invention is acidificable decomposition, in order to verify its acidifying decomposability, to it
Continue acidifying decomposition experiment.Its experimental procedure is:
Weigh the sealing agent (particle diameter is more than 10 mesh) that 1.0g is dried, be placed in the acid solution of 100ml, at a certain temperature, put
After putting certain time, residue is crossed 100 mesh sieve, after being rinsed well with tap water, dries and weigh (m), calculate acid-soluble ratio s,
S=(1-m)/1 × 100%(3-3)
S is acid-soluble ratio；M is residue quality.
Acidifying experiment 1
Acidifying experiment is carried out using the hydrofluoric acid solution of volume fraction 20%, at 100 DEG C, blocks after the reaction of 0.8 hour
Agent is completely dissolved in a solution of hydrofluoric acid, acid molten before and after effect as shown in accompanying drawing 7 and accompanying drawing 8, reacted solution water white transparency.
Acidifying experiment 2
Acidifying experiment, at 100 DEG C, sealing agent after the reaction of 0.5 hour are carried out using the hydrochloric acid solution of volume fraction 20%
It is completely decomposed into little particle and is deposited in container bottom, top is then the clear solution of yellow.This is the list due to synthesizing sealing agent
Fe is contained in body3+, fe after sealing agent decomposes in acid3+Discharge, and and cl-Complexation, forms [fecl6]3-, [fecl6]3-
Assume yellow.
After above-mentioned acidification reaction, it is computed, acid-soluble ratio reaches 90% to 100%.
Embodiment 2
Change into 3.5 hours by being warming up to the time keeping after 100 DEG C in bentonite modified reaction；Will be anti-for gel plugging agent preparation
Should in heating in water bath time change into 4.5 hours, drying time change into 8.5 hours, other conditions are with embodiment 1.
Embodiment 3
Change into 4.5 hours by being warming up to the time keeping after 100 DEG C in bentonite modified reaction；Will be anti-for gel plugging agent preparation
Should in heating in water bath time change into 5.5 hours, drying time change into 9.5 hours, other conditions are with embodiment 1.
After the gel plugging agent of above-mentioned three kinds of embodiments preparation is compared it was concluded that three with existing its
His gel-like sealing agent is compared and is respectively provided with high temperature resistance, and toughness is big, prepares in the advantage of easy acidolysis, and embodiment 1 among three
Gel plugging agent performance more prominent.
Above-mentioned specific embodiment is only the concrete case of the present invention, and the scope of patent protection of the present invention includes but is not limited to
The product form of above-mentioned specific embodiment and style, any claims of the present invention and any art of meeting
Suitable change or modification that those of ordinary skill is done to it, all should fall into the scope of patent protection of the present invention.
Claims (8)
1. a kind of preparation method of acidificable breakdown type high temperature resistance gel plugging agent is it is characterised in that it is by following weight portion
Raw material reaction generate cross-linked gel:
Mass fraction is 25% bentone soil paste 40 ~ 50 weight portion；
Acrylamide (am) 2 ~ 6 weight portion；
2- acrylamide-2-methylpro panesulfonic acid (amps) 8 ~ 12 weight portion；
High-temperature stabilizer 1 ~ 5 weight portion；
Nonionic surfactant 3 ~ 5 weight portion；
Initiator 0.01 ~ 0.03 weight portion；
Cross-linking agent 0.03 ~ 0.05 weight portion；
Its preparation process is as follows:
(1) raw material a, b and c are added and carry out in reactor being sufficiently stirred for dissolving, and adjust ph value to neutrality；
(2) raw material d and e is added in reactor and stir；
(3) raw material f and g is added in reactor and be placed on 60 DEG C of water bath with thermostatic control heating；
(4) product is taken out and cut into fritter, be placed in after being cleaned with water in 90 DEG C of environment and dry, before use will using pulverizer
It is milled to desired particle size.
2. the preparation method of a kind of acidificable breakdown type high temperature resistance gel plugging agent according to claim 1, its feature exists
In the modified alta-mud in described bentone soil paste is to be generated by the raw material reaction of following weight portion:
Sodium hydroxide 1 ~ 2 weight portion；
Sodium carbonate 2 ~ 5 weight portion；
Bentonite 7 ~ 12 weight portion；
Water, balance of water；
Its preparation process is as follows:
Raw material h, i and k are added in reaction vessel and is warming up to 80 ~ 90 DEG C under stirring；
Raw material j is added in described reaction vessel and is kept stirring for state, be warming up to 100 DEG C after having added and keep one section
Time；
Stop heating and being cooled to room temperature after the completion of reaction, take out product cleaning and be dried, obtain final product described modified alta-mud.
3. the preparation method of a kind of acidificable breakdown type high temperature resistance gel plugging agent according to claim 1, its feature exists
In being that ph value is adjusted by sodium hydroxide in described step (1).
4. a kind of preparation method of acidificable breakdown type temperature gel plugging agent according to claim 1 is it is characterised in that institute
Stating nonionic surfactant is span-80.
5. the preparation method of a kind of acidificable breakdown type high temperature resistance gel plugging agent according to claim 1, its feature exists
In the time of the heating in water bath in described step (3) is 4.5 ~ 5.5 hours.
6. the preparation method of a kind of acidificable breakdown type high temperature resistance gel plugging agent according to claim 1, its feature exists
In the drying time in described step (4) is 8.5 ~ 9.5 hours.
7. the preparation method of a kind of acidificable breakdown type high temperature resistance gel plugging agent according to claim 2, its feature exists
In the time being warming up to holding after 100 DEG C in described step (2) is 3.5 ~ 4.5 hours.
8. a kind of preparation method system by the acidificable breakdown type high temperature resistance gel plugging agent of any one described in claim 1-6
Standby sealing agent is it is characterised in that be used for oil well and drilling leakage blockage.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107151552A (en) * | 2017-05-04 | 2017-09-12 | 中国地质大学（武汉） | One kind can water swelling sealing agent |
| CN107189772A (en) * | 2017-05-02 | 2017-09-22 | 中国地质大学（武汉） | One kind can water swelling sealing agent |
| CN110564393A (en) * | 2019-08-08 | 2019-12-13 | 大庆油田有限责任公司 | Micro-expansion type plugging agent and preparation method thereof |
| CN114716608A (en) * | 2022-05-07 | 2022-07-08 | 中国石油天然气集团有限公司 | Water-based drilling fluid, plugging agent for water-based drilling fluid and preparation method of plugging agent |
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| CN110564393B (en) * | 2019-08-08 | 2022-06-10 | 大庆油田有限责任公司 | Micro-expansion type plugging agent and preparation method thereof |
| CN114716608A (en) * | 2022-05-07 | 2022-07-08 | 中国石油天然气集团有限公司 | Water-based drilling fluid, plugging agent for water-based drilling fluid and preparation method of plugging agent |
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