CN110079283A - A method of improving Environment-protecting Drilling Fluids inorganic agent temperature resistance - Google Patents
A method of improving Environment-protecting Drilling Fluids inorganic agent temperature resistance Download PDFInfo
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- CN110079283A CN110079283A CN201810077619.0A CN201810077619A CN110079283A CN 110079283 A CN110079283 A CN 110079283A CN 201810077619 A CN201810077619 A CN 201810077619A CN 110079283 A CN110079283 A CN 110079283A
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- drilling fluids
- inorganic agent
- environment
- temperature resistance
- protecting
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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
- C08F120/00—Homopolymers 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
- C08F120/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F120/52—Amides or imides
- C08F120/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F120/56—Acrylamide; Methacrylamide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
- C08J3/246—Intercrosslinking of at least two polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2301/08—Cellulose derivatives
- C08J2301/26—Cellulose ethers
- C08J2301/28—Alkyl ethers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2303/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2303/04—Starch derivatives
- C08J2303/08—Ethers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2433/00—Characterised by the use of homopolymers or 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 of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/24—Homopolymers or copolymers of amides or imides
- C08J2433/26—Homopolymers or copolymers of acrylamide or methacrylamide
Abstract
The present invention provides a kind of method for improving Environment-protecting Drilling Fluids inorganic agent temperature resistance, at room temperature, prepares quality acrylamide solution, and in 60~90 DEG C of waters bath with thermostatic control, ammonium persulfate solution is added, stops heating after stirring；Continue to add water and sodium hydroxide, is warming up to 90 DEG C or more and is hydrolyzed, taken out after stirring, strong hydrated polymer is made；After Environment-protecting Drilling Fluids inorganic agent is configured to aqueous solution, aforementioned strong hydrated polymer, crosslinking agent, formates is added, after 50~80 DEG C of waters bath with thermostatic control slowly stir 20-40 minutes, stops heating, Environment-protecting Drilling Fluids inorganic agent is made.This method optimizes Environment-protecting Drilling Fluids inorganic agent using adjustment molecular structure, molecular weight, aquation group, crosslinking agent, improves its temperature resistance, is conducive to green drilling well, is suitable for the fields such as oil drilling.
Description
Technical field
The present invention relates to one of drilling well auxiliary chemicals technical fields to improve Environment-protecting Drilling Fluids inorganic agent temperature resistance
Method.
Background technique
With the continuous reinforcement of environmental protection consciousness in oil exploitation, rejected well drilling liquid to the pollution problem of environment increasingly
It is valued by people.The country gradually starts to require to carry out harmless treatment to rejected well drilling liquid and discarded drilling cuttings etc., reduces
The destruction of pollution and ecological environment to environment.The processing mode cost input of this " end treatment " is high, and is difficult to thoroughly disappear
Depollution hidden danger brings huge economy and environmental pressure to drilling well industry.Constantly to deep with In Oil Field Exploration And Development
Layer promotes, and the more excellent inorganic agent of temperature resistance, traditional most of Environment-protecting Drilling Fluids processing need to be introduced in drilling fluid
Agent is mainly obtained by the way of natural macromolecule modification, is mainly had: starch, cellulose family etc., but big in drilling fluid
Part temperature resistance≤120 DEG C are not able to satisfy deep high-temperature stratum drilling well demand.
To improve Environment-protecting Drilling Fluids inorganic agent heat-resisting property, presently mainly it is to introduce the strong ionic group of hydrophily
It is main, such as sulfonic group, sulphur methyl and carboxyl, to guarantee that thicker aquation can be formed after inorganic agent is adsorbed on clay particle surface
Film makes drilling fluid have stronger thermal stability.Some methods are in order to further increase the heat-resisting property of inorganic agent, in inorganic agent
Cr is introduced in molecule3+、Fe3+The high valent cationics such as iron are allowed to form complex compound with organic agent, but are to the feature of environmental protection
One very big loss.
Existing researcher proposes the preparation method for starch conversion, and application No. is 201010237144.0 to propose
5-8g oxidized form initiator A is added in a kind of preparation method of drilling fluid environment-friendly type coating agent in 95-92mL water respectively first
With 5-8g reduced form initiator B, come prepare oxidized form initiator A solution that concentration is 5%-8% and concentration be 5%-8% also
Prototype initiator B solution；Then 10-40mL water is added in beaker, 8.0-13.5g non-ionic monomer, stirring are added into water
And it sufficiently dissolves；Then 1.0-5.0g biopolymer monomer is added, continues to stir, it is allowed sufficiently to dissolve；Add 4.0-
10.0g anionic monomer continues to be sufficiently stirred；2.0-7.5gpH value regulator is added, is sufficiently stirred；It is separately added into 0.5- later
3.0mL oxidized form and reduced form initiator, are sufficiently stirred；Finally continue to stir, starts fever polymerization after five minutes, at 40-50 DEG C
Under the conditions of, 2-4h is reacted, final products are obtained.To obtain a kind of strong applicability, heat and salinity tolerance performance is excellent, and environmental-protecting performance is good
Coating agent.A kind of modification of chitosan is proposed as the shale control agent in drilling fluid application No. is 201610729687.1 to exist
Application in oil/gas drilling, modified group R1-R3It is each independently selected from the alkyl of C1-C8, R4It is taken selected from unsubstituted or hydroxyl
The alkylidene of the C1-C8 in generation.Application No. is 200810104553.6 propose a kind of anti-temperature starch composition for drilling liquid and its
Preparation method, it includes starch, catalyst, cation reagent and crosslinking agent, and wherein starch is by potato starch, tapioca, jade
Rice starch is constituted, and weight fraction ratio is 30~80: 20~60: 10~50；The weight ratio of the catalyst and starch is 5~30
: 100, the weight ratio of the cation reagent and starch is 1~20: 100, and the weight ratio of crosslinking agent and starch is 0.01~0.6:
100.The drilling fluid anti-temperature starch not only can effectively inhibit its Fermented but also its temperature resistance is made to be increased to 150 by 120 DEG C
DEG C, to substantially increase the use scope of drilling fluid starch.Application No. is 201410268639.8 propose it is a kind of compound
Active enzyme preparation and its method for being used to prepare lignite class filtrate reducer for drilling fluid in oilfields, the composite reactive enzyme preparation include with
Lower formula components: Sphingobacterium, bacillus pumilus, flavin reductase and ammonium acetate, the Sphingobacterium, short and small gemma
Bacillus, flavin reductase, the molar ratio between ammonium acetate are as follows: 5~10:5~10:10~50:40~80.The bright preparation of this method
The lignite class filtrate reducer for drilling fluid in oilfields product that temperature resistance, salt resistance, viscosity reduction, especially heat and salinity tolerance performance effectively improve makes
With conveniently, additive amount is few, dissolves without using solvent, can be directly appended to use in drilling fluid, use cost is cheap and environmentally friendly.
The above research plays important impetus to the raising of Environment-protecting Drilling Fluids inorganic agent heat-resisting property, but fails
Optimize for Environment-protecting Drilling Fluids inorganic agent molecular structure, or need in terms of molecular size range, crosslinking agent into
One step is clear.
Summary of the invention
It is anti-that in response to the problems existing in the prior art, the purpose of the present invention is to provide a kind of raising Environment-protecting Drilling Fluids inorganic agents
The method of warm nature, this method is using adjustment molecular structure, molecular weight, aquation group, crosslinking agent to Environment-protecting Drilling Fluids inorganic agent
It optimizes, improves its temperature resistance, be conducive to green drilling well, be suitable for the fields such as oil drilling.
In order to reach the purpose of the present invention, the technical scheme is that be achieved:
At room temperature, the acrylamide solution 400-600ml for preparing mass concentration ratio 6-12%, in 60~90 DEG C of waters bath with thermostatic control
In, mass concentration ratio 8-12% ammonium persulfate solution 4-6ml is added, slowly stirs, after 20-40 minutes, stops heating；Continue to add
Water 400-600ml and mass concentration ratio 8-12% sodium hydroxide 15-25ml, is warming up to 90 DEG C or more and is hydrolyzed, slowly stir
It mixes, is taken out after 20-40 minutes, strong hydrated polymer is made；15-25g Environment-protecting Drilling Fluids inorganic agent is configured to mass concentration
After aqueous solution than 15-25%, aforementioned strong hydrated polymer 3-6ml, crosslinking agent 1.5-2.5g, formates 3-5g is added, 50~
After 80 DEG C of waters bath with thermostatic control slowly stir 20-40 minutes, stop heating, Environment-protecting Drilling Fluids inorganic agent is made.
Above scheme advanced optimizes scheme:
At room temperature, the acrylamide solution 450-550ml for preparing mass concentration ratio 9-11%, in 60~90 DEG C of waters bath with thermostatic control
In, mass concentration ratio 9-11% ammonium persulfate solution 4.5-5.5ml is added, slowly stirs, after 20-40 minutes, stops heating；After
Continuous plus water 450-550ml and mass concentration ratio 9-11% sodium hydroxide 18-22ml, is warming up to 90 DEG C or more and is hydrolyzed, slowly
Slow stirring, takes out after 20-40 minutes, strong hydrated polymer is made；18-22g Environment-protecting Drilling Fluids inorganic agent is configured to quality
After the aqueous solution of concentration ratio 18-22%, aforementioned strong hydrated polymer 4.5-5.5ml, crosslinking agent 1.5-2.5g, formates is added
3.5-4.5g stops heating after 50~80 DEG C of waters bath with thermostatic control slowly stir 20-40 minutes, and Environment-protecting Drilling Fluids processing is made
Agent.
Strong hydrated polymer molecular weight≤1,000,000, degree of hydrolysis >=60% are distributed in straight chain.
The Environment-protecting Drilling Fluids inorganic agent includes carboxymethyl starch or carboxymethyl cellulose class modified natural polymer material
Material.
The crosslinking agent includes one or more of combinations of sodium trimetaphosphate, sodium tripolyphosphate class.
The formates includes one or more of combinations of potassium formate, sodium formate.
The present invention has the advantage that compared with prior art
(1) the strong hydrated polymer that the present invention uses, relative to materials such as multi-component copolymer graft polymers, molecular structure is in straight chain
Distribution, grafts on modified natural polymer, is keeping the feature of environmental protection, hydrability simultaneously, temperature resistance is stronger, is easy to execute-in-place；
(2) crosslinking agent of the invention used, formates are relative to Cr3+、Fe3+The high valent cationics such as iron are environmental-friendly
Profile material ensure that the additive for drilling fluid feature of environmental protection；
(3) present invention can be used in the stringent region deep formation drilling technology of environmental requirement, improve drilling fluid temperature resistance.Experiment
Above-mentioned Environment-protecting Drilling Fluids inorganic agent temperature resistance, which is added, in verifying can be improved 20~50 DEG C.
Specific embodiment
Below by specific embodiment, the invention will be further described.
Embodiment 1:
At room temperature, it is molten that 10% ammonium persulfate is added dropwise in 65 DEG C of waters bath with thermostatic control in the acrylamide solution 500ml for preparing 10%
Liquid 5ml, is slowly stirred, and after half an hour, stops heating；500ml water is added, 10% sodium hydroxide 20ml is added, is put into boiling water
In bath, it is warming up to 90 DEG C or more and is hydrolyzed, slowly stir, taken out after half an hour, strong hydrated polymer is made；By 20g carboxylic first
Base starch is configured to 20% aqueous solution, the strong hydrated polymer of 5ml, 2g sodium tripolyphosphate, 4g potassium formate is added, in 60 DEG C of thermostatted waters
After bath slowly stirs half an hour, stop heating to get the better Environment-protecting Drilling Fluids inorganic agent of temperature resistance.
Embodiment 2:
At room temperature, it is molten that 9% ammonium persulfate is added dropwise in 75 DEG C of waters bath with thermostatic control in the acrylamide solution 500ml for preparing 9%
Liquid 5ml, is slowly stirred, and after 25 minutes, stops heating；500ml water is continuously added, 10% sodium hydroxide 20ml is added, is put into
In boiling water bath, it is warming up to 95 DEG C and is hydrolyzed, slowly stir, taken out after half an hour, strong hydrated polymer is made；By 20g carboxylic first
Base cellulose is configured to 20% aqueous solution, the strong hydrated polymer of 5ml, 2g sodium tripolyphosphate, 4g potassium formate is added, in 60 DEG C of constant temperature
After water-bath slowly stirs half an hour, stop heating to get the better Environment-protecting Drilling Fluids inorganic agent of temperature resistance
Embodiment 3:
At room temperature, it is molten that 10% ammonium persulfate is added dropwise in 70 DEG C of waters bath with thermostatic control in the acrylamide solution 550ml for preparing 10%
Liquid 5.2ml, is slowly stirred, and after forty minutes, stops heating；550ml water is added, 10% sodium hydroxide 23ml is added, is put into boiling
In water-bath, it is warming up to 96 DEG C and is hydrolyzed, slowly stir, taken out after half an hour, strong hydrated polymer is made；By 25g carboxymethyl
Starch is configured to 20% aqueous solution, the strong hydrated polymer of 6ml, 2.5g sodium tripolyphosphate, 4.5g sodium formate is added, in 60 DEG C of constant temperature
After water-bath slowly stirs half an hour, stop heating to get the better Environment-protecting Drilling Fluids inorganic agent of temperature resistance.
Embodiment 4:
At room temperature, it is molten that 10% ammonium persulfate is added dropwise in 75 DEG C of waters bath with thermostatic control in the acrylamide solution 500ml for preparing 10%
Liquid 5ml, is slowly stirred, and after half an hour, stops heating；500ml water is added, 10% sodium hydroxide 20ml is added, is put into boiling water
In bath, it is warming up to 90 DEG C and is hydrolyzed, slowly stir, taken out after half an hour, strong hydrated polymer is made；20g carboxymethyl is formed sediment
Powder is configured to 20% aqueous solution, and the strong hydrated polymer of 5ml, 2g sodium trimetaphosphate, 4g potassium formate is added, slow in 70 DEG C of waters bath with thermostatic control
After slow stirring half an hour, stop heating to get the better Environment-protecting Drilling Fluids inorganic agent of temperature resistance.
Embodiment 5:
At room temperature, it is molten that 10% ammonium persulfate is added dropwise in 75 DEG C of waters bath with thermostatic control in the acrylamide solution 500ml for preparing 10%
Liquid 5ml, is slowly stirred, and after half an hour, stops heating；500ml water is added, 10% sodium hydroxide 20ml is added, is put into boiling water
In bath, it is warming up on 98 DEG C and is hydrolyzed, slowly stir, taken out after half an hour, strong hydrated polymer is made；By 20g carboxymethyl
Starch is configured to 20% aqueous solution, the strong hydrated polymer of 5ml, 2g sodium tripolyphosphate, 2g potassium formate, 2g sodium formate is added, at 70 DEG C
After water bath with thermostatic control slowly stirs half an hour, stop heating to get the better Environment-protecting Drilling Fluids inorganic agent of temperature resistance.
% in above-described embodiment is mass percent.
Claims (6)
1. a kind of method for improving Environment-protecting Drilling Fluids inorganic agent temperature resistance, it is characterised in that:
At room temperature, the acrylamide solution 400-600ml for preparing mass concentration ratio 6-12%, in 60~90 DEG C of waters bath with thermostatic control
In, mass concentration ratio 8-12% ammonium persulfate solution 4-6ml is added, slowly stirs, after 20-40 minutes, stops heating；Continue to add
Water 400-600ml and mass concentration ratio 8-12% sodium hydroxide 15-25ml, is warming up to 90 DEG C or more and is hydrolyzed, slowly stir
It mixes, is taken out after 20-40 minutes, strong hydrated polymer is made；15-25g Environment-protecting Drilling Fluids inorganic agent is configured to mass concentration
Aforementioned strong hydrated polymer 3-6ml, crosslinking agent 1.5-2.5g, formates 3-5g is added in aqueous solution than 15-25% afterwards, 50~
After 80 DEG C of waters bath with thermostatic control slowly stir 20-40 minutes, stop heating, Environment-protecting Drilling Fluids inorganic agent is made.
2. the method according to claim 1 for improving Environment-protecting Drilling Fluids inorganic agent temperature resistance, it is characterised in that: in room temperature
Under, the acrylamide solution 450-550ml of mass concentration ratio 9-11% is prepared, in 60~90 DEG C of waters bath with thermostatic control, quality is added
Concentration ratio 9-11% ammonium persulfate solution 4.5-5.5ml, is slowly stirred, and after 20-40 minutes, stops heating；Continue to add water 450-
550ml and mass concentration ratio 9-11% sodium hydroxide 18-22ml, is warming up to 90 DEG C or more and is hydrolyzed, slowly stir, 20-
It takes out after forty minutes, strong hydrated polymer is made；18-22g Environment-protecting Drilling Fluids inorganic agent is configured to mass concentration ratio 18-
After 22% aqueous solution, aforementioned strong hydrated polymer 4.5-5.5ml, crosslinking agent 1.5-2.5g, formates 3.5-4.5g is added,
After 50~80 DEG C of waters bath with thermostatic control slowly stir 20-40 minutes, stop heating, Environment-protecting Drilling Fluids inorganic agent is made.
3. the method according to claim 1 or 2 for improving Environment-protecting Drilling Fluids inorganic agent temperature resistance, it is characterised in that: institute
State strong hydrated polymer molecular weight≤1,000,000, degree of hydrolysis >=60%.
4. the method according to claim 3 for improving Environment-protecting Drilling Fluids inorganic agent temperature resistance, it is characterised in that: the ring
Guarantor's type additive for drilling fluid includes carboxymethyl starch or carboxymethyl cellulose class modified natural polymer material.
5. the method according to claim 3 for improving Environment-protecting Drilling Fluids inorganic agent temperature resistance, it is characterised in that: the friendship
Connection agent includes one or more of combinations of sodium trimetaphosphate, sodium tripolyphosphate class.
6. a kind of method for improving Environment-protecting Drilling Fluids inorganic agent temperature resistance according to claim 3, it is characterised in that: institute
State one or more of combinations that formates includes potassium formate, sodium formate.
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| CN101255333A (en) * | 2008-04-21 | 2008-09-03 | 北京中科日升科技有限公司 | Anti-temperature starch composition for drilling liquid and preparation method thereof |
| CN102775968A (en) * | 2012-07-03 | 2012-11-14 | 彭传兵 | Heat-resistant and salt-tolerant filtrate loss reducer for drilling fluid and preparation method thereof |
| CN104558217A (en) * | 2014-12-30 | 2015-04-29 | 北京中科日升科技有限公司 | Cross-linked starch for drilling fluid and preparation method thereof |
| CN105199059A (en) * | 2015-10-29 | 2015-12-30 | 中国地质大学（北京） | Chromium-free viscosity reducer for drilling fluid for oil field and preparation method of viscosity reducer |
| CN105324459A (en) * | 2013-03-20 | 2016-02-10 | 埃尔凯姆有限公司 | Viscosifier for oil well fluids |
| CN105452300A (en) * | 2013-08-08 | 2016-03-30 | 生物聚合物网络有限公司 | Modified starch |
| CN106433581A (en) * | 2016-09-22 | 2017-02-22 | 中国海洋石油总公司 | Clay-free high temperature resistance reservoir drilling fluid and preparation method thereof |
-
2018
- 2018-01-26 CN CN201810077619.0A patent/CN110079283A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255333A (en) * | 2008-04-21 | 2008-09-03 | 北京中科日升科技有限公司 | Anti-temperature starch composition for drilling liquid and preparation method thereof |
| CN102775968A (en) * | 2012-07-03 | 2012-11-14 | 彭传兵 | Heat-resistant and salt-tolerant filtrate loss reducer for drilling fluid and preparation method thereof |
| CN105324459A (en) * | 2013-03-20 | 2016-02-10 | 埃尔凯姆有限公司 | Viscosifier for oil well fluids |
| CN105452300A (en) * | 2013-08-08 | 2016-03-30 | 生物聚合物网络有限公司 | Modified starch |
| CN104558217A (en) * | 2014-12-30 | 2015-04-29 | 北京中科日升科技有限公司 | Cross-linked starch for drilling fluid and preparation method thereof |
| CN105199059A (en) * | 2015-10-29 | 2015-12-30 | 中国地质大学（北京） | Chromium-free viscosity reducer for drilling fluid for oil field and preparation method of viscosity reducer |
| CN106433581A (en) * | 2016-09-22 | 2017-02-22 | 中国海洋石油总公司 | Clay-free high temperature resistance reservoir drilling fluid and preparation method thereof |
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