CN104531098A - Salt-resistant filtrate loss reducer for grafted starch drilling fluid - Google Patents
Salt-resistant filtrate loss reducer for grafted starch drilling fluid Download PDFInfo
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- CN104531098A CN104531098A CN201410831902.XA CN201410831902A CN104531098A CN 104531098 A CN104531098 A CN 104531098A CN 201410831902 A CN201410831902 A CN 201410831902A CN 104531098 A CN104531098 A CN 104531098A
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- acrylamide
- drilling fluid
- loss reduction
- auxiliary agent
- resistant filter
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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
- C09K8/02—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
- 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
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F291/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds according to more than one of the groups C08F251/00 - C08F289/00
-
- 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
- C08F8/00—Chemical modification by after-treatment
- C08F8/12—Hydrolysis
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention relates to a salt-resistant filtrate loss reducer for a grafted starch drilling fluid. The salt-resistant filtrate loss reducer is prepared from acrylamide, 2-acrylamide-2-methyl propane sulfonic acid, sodium carbonate and starch as raw materials by the processes of raw material preparation, polymerization reaction, hydrolysis reaction and modified drying. The salt-resistant filtrate loss reducer has the advantages of relatively high compatibility, relatively high filtration reducing ability in fresh water, saline water, saturated salt water and composite saltwater drilling fluid, and high-temperature resistance; and the drilling efficiency and the oil quality can be effectively improved.
Description
Technical field
The invention belongs to petroleum chemicals field, be specifically related to a kind of graft starch drilling fluid salt resistant filter loss reduction agent.
Background technology
In oil production process; because deep-well, ultra deep well downhole temperature and pressure are high; stratal configuration more complicated; often high-pressure oil-gas layer and brine layer can be run in drilling process; drilling fluid liquid phase is caused to infiltrate stratum; affect the stable of hydrocarbon zone and quality product, the effective ways addressed this problem at present add fluid loss agent exactly in drilling fluid, and the quality of fluid loss agent largely affects efficiency and the quality of drilling well.
Chinese patent " a kind of preparation method of fluid loss additive for boring fluid " (patent No. ZL200910113490.5) discloses a kind of anti-fluid loss agents; its with Sodium salts humic acids, etherification starch, Natvosol, polyacrylamide and water-soluble silicon oil for Material synthesis; this kind of method complex process; heat-resisting property is poor; facility investment and raw materials cost high; there is a large amount of discharging of waste liquid, be unfavorable for environment protection.
Summary of the invention
Technical problem to be solved by this invention is, provides that a kind of technique is simply controlled, output efficiency is high, filtrate reducing is effective and the employing starch with saline-alkaline tolerance carries out the drilling fluid salt resistant filter loss reduction agent of grafting.
The technical scheme that the present invention solves the employing of its technical problem is: a kind of graft starch drilling fluid salt resistant filter loss reduction agent, it comprises the raw material of following weight: acrylamide 2400-3600kg, 2-acrylamide-2-methyl propane sulfonic 0-200kg, soda ash 180-350kg, starch 500-2500kg;
Preferably, the weight of described 2-acrylamide-2-methyl propane sulfonic is 50-200kg.
Optimum, comprise the raw material of following weight: acrylamide 2400kg, 2-acrylamide-2-methyl propane sulfonic 50kg, soda ash 240kg and starch 1500kg.
Further, its preparation technology comprises:
Step (1) raw material prepares: prepare acrylamide solution and the soda ash aqueous solution respectively, the total mass of water used is 3-5 times of acrylamide quality, after having prepared, two kinds of aqueous solution is obtained feed liquid, after adding reactor, off-response still valve passes into nitrogen, then adds auxiliary agent; The consumption of described auxiliary agent is the 0.1-0.8% of acrylamide quality, and described auxiliary agent is Potassium Persulphate or ammonium sulfate;
Step (2) polyreaction: 5-11 DEG C of low temperature causes, and non-temperature control is to 60-90 DEG C, and namely after initiated polymerization, polyreaction heat release makes reaction system be warming up to 60-90 DEG C, and reaction terminates;
Step (3) hydrolysis reaction: after polyreaction terminates, keeps temperature in the kettle 60 DEG C-90 DEG C, keeps 6 hours;
Step (4) modification, drying: step (3) products therefrom press-in tablets press is carried out granulation, sends in kneader, add starch and the 2-acrylamide-2-methyl propane sulfonic of described weight through conveying fan, adjust ph is to 8-10, dry, to obtain final product.
Further improvement, the described feed liquid mass concentration of step (1) is 20-30%.
Further improvement, step (1) auxiliary agent at twice equivalent adds, and the working method that auxiliary agent adds and lead to nitrogen is: keep nitrogen flow 100m
3/ h, logical nitrogen 10 minutes; Change nitrogen flow to 60m
3/ h, first time adds auxiliary agent; Change nitrogen flow to 100m
3/ h, keeps 40 minutes; Change nitrogen flow to 60m
3/ h, second time adds auxiliary agent; Change nitrogen flow to 120m
3/ h, keeps 10-15 minute.
Further improvement, step (4) dry standard is that material solid content is not less than 88%.
Further improvement, preparation technology selects≤deionized water of 20 μ s/cm.
Positively effect of the present invention is:
1, present invention process is simply controlled, and technique adopts two-step approach, and specifically comprise polymerization stage and modification stage, the first step is acrylamide, soda ash and the water homopolymerization in reactor, and reaction product is solid colloid; Second step is the first step gained solid colloid, 2-acrylamide-2-methyl propane sulfonic and the starch modified-reaction at kneader.Select two-step approach that reaction is tended towards stability, be conducive to the control of technological process, improve the stability of product property, strengthen the security of personnel and equipment;
2, the 2-acrylamide-2-methyl propane sulfonic that adds of the present invention is as rigid unitary, can change the molecular density of polymkeric substance; And the sulfonic acid functional group of the carbon-carbon double bond had in molecular structure, carboxylic acid group and strong polarity, make electric density large, hydrability is strong, thus salinity, temperature-insensitive to external world, reach the ability of salt resistant filter loss reduction agent temperature resistance, anti-salt;
3, passing through when adding auxiliary agent to adjust nitrogen flow in time, improving the solubleness of auxiliary agent, speed of reaction and reaction homogeneity, improving reaction efficiency;
4, the present invention selects the grafting degree of starch determination end product, effectively can reduce production cost;
5, low temperature elicitation technique efficiency of initiation is high, easy to operate.
Salt resistant filter loss reduction agent of the present invention is by force water-soluble, and compatibleness is good, all has stronger filtrate reducing ability, have temperature resistance ability concurrently in fresh water, salt solution, saturated brine and composite salt aqueous drilling fluid, can effectively improve drilling efficiency and oil quality.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, below in conjunction with embodiment in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
embodiment 1
The raw material choose of embodiment 1: acrylamide 2400kg, 2-acrylamide-2-methyl propane sulfonic 50kg, soda ash 240kg, starch 1500kg.
The preparation process of the present embodiment is:
Step (1) raw material prepares: prepare acrylamide solution and the soda ash aqueous solution respectively, the total mass of water used is 3-5 times of acrylamide quality, after having prepared, two kinds of aqueous solution is obtained feed liquid, after adding reactor, off-response still valve passes into nitrogen, then adds auxiliary agent; The consumption of described auxiliary agent is 0.5% of acrylamide quality, and described auxiliary agent is Potassium Persulphate;
Step (2) polyreaction: 5-11 DEG C of low temperature causes, and non-temperature control is to 60-90 DEG C;
Step (3) hydrolysis reaction: after polyreaction terminates, keeps temperature in the kettle 60 DEG C-90 DEG C, keeps 6 hours;
Step (4) modification, drying: step (3) products therefrom press-in tablets press is carried out granulation, sends in kneader, add starch and the 2-acrylamide-2-methyl propane sulfonic of described weight through conveying fan, adjust ph is to 8-10, dry, to obtain final product.
The described feed liquid mass concentration of step (1) is 20-30%.
Step (1) auxiliary agent at twice equivalent adds, and the working method that auxiliary agent adds and lead to nitrogen is: keep nitrogen flow 100m
3/ h, logical nitrogen 10 minutes; Change nitrogen flow to 60m
3/ h, first time adds auxiliary agent; Change nitrogen flow to 100m
3/ h, keeps 40 minutes; Change nitrogen flow to 60m
3/ h, second time adds auxiliary agent; Change nitrogen flow to 120m
3/ h, keeps 10-15 minute.
Step (4) dry standard is that material solid content is not less than 88%.
Preparation technology selects≤deionized water of 20 μ s/cm.
The recommendation dosage of embodiment 1 in fresh-water drilling fluid, 0.2% ~ 0.5%, the recommendation dosage in salt-water drilling fluid, 1.0% ~ 2.0%.
The Testing index of the present embodiment is in table 1.
The Testing index of table 1 embodiment 1
embodiment 2-7
Embodiment 2-7 difference from Example 1 is only raw material and proportioning, proportioning in kg, specifically in table 2.
The raw material of table 2 embodiment 2-7 and proportioning
It is nontoxic that filter humectant falls in the anti-salt of the present embodiment, to environment and the person harmless, its safety index meets international material safety date sheet (MSDS).
Claims (8)
1. a graft starch drilling fluid salt resistant filter loss reduction agent, is characterized in that, it comprises the raw material of following weight: acrylamide 2400-3600kg, 2-acrylamide-2-methyl propane sulfonic 0-200kg, soda ash 180-350kg, starch 500-2500kg.
2. a kind of graft starch drilling fluid salt resistant filter loss reduction agent according to claim 1, is characterized in that, the weight of described 2-acrylamide-2-methyl propane sulfonic is 50-200kg.
3. a kind of graft starch drilling fluid salt resistant filter loss reduction agent according to claim 1, is characterized in that, comprise the raw material of following weight: acrylamide 2400kg, 2-acrylamide-2-methyl propane sulfonic 50kg, soda ash 240kg and starch 1500kg.
4. a kind of graft starch drilling fluid salt resistant filter loss reduction agent according to any one of claim 1-3, it is characterized in that, preparation technology comprises:
Step (1) raw material prepares: prepare acrylamide solution and the soda ash aqueous solution respectively, the total mass of water used is 3-5 times of acrylamide quality, after having prepared, two kinds of aqueous solution is obtained feed liquid, after adding reactor, off-response still valve passes into nitrogen, then adds auxiliary agent; The consumption of described auxiliary agent is the 0.1-0.8% of acrylamide quality, and described auxiliary agent is Potassium Persulphate or ammonium sulfate;
Step (2) polyreaction: 5-11 DEG C of low temperature causes, and non-temperature control is to 60-90 DEG C;
Step (3) hydrolysis reaction: after polyreaction terminates, keeps temperature in the kettle 60 DEG C-90 DEG C, keeps 6 hours;
Step (4) modification, drying: step (3) products therefrom press-in tablets press is carried out granulation, sends in kneader, add starch and the 2-acrylamide-2-methyl propane sulfonic of described weight through conveying fan, adjust ph is to 8-10, dry, to obtain final product.
5. a kind of graft starch drilling fluid salt resistant filter loss reduction agent according to claim 4, is characterized in that, the described feed liquid mass concentration of step (1) is 20-30%.
6. a kind of graft starch drilling fluid salt resistant filter loss reduction agent according to claim 4, it is characterized in that, step (1) auxiliary agent at twice equivalent adds, and the working method that auxiliary agent adds and lead to nitrogen is: keep nitrogen flow 100m
3/ h, logical nitrogen 10 minutes; Change nitrogen flow to 60m
3/ h, first time adds auxiliary agent; Change nitrogen flow to 100m
3/ h, keeps 40 minutes; Change nitrogen flow to 60m
3/ h, second time adds auxiliary agent; Change nitrogen flow to 120m
3/ h, keeps 10-15 minute.
7. a kind of graft starch drilling fluid salt resistant filter loss reduction agent according to claim 4, is characterized in that, step (4) dry standard is that material solid content is not less than 88%.
8. a kind of graft starch drilling fluid salt resistant filter loss reduction agent according to claim 4, is characterized in that, preparation technology selects≤and the deionized water of 20 μ s/cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410831902.XA CN104531098A (en) | 2014-12-29 | 2014-12-29 | Salt-resistant filtrate loss reducer for grafted starch drilling fluid |
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| CN201410831902.XA CN104531098A (en) | 2014-12-29 | 2014-12-29 | Salt-resistant filtrate loss reducer for grafted starch drilling fluid |
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| CN104531098A true CN104531098A (en) | 2015-04-22 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104927804A (en) * | 2015-05-06 | 2015-09-23 | 中国石油集团渤海钻探工程有限公司 | Heat resistance and salt tolerance polymer filtrate reducer and preparation method therefor |
| CN106939061A (en) * | 2017-03-15 | 2017-07-11 | 石家庄华莱鼎盛科技有限公司 | Fluid loss additive for boring fluid natural polymerses and preparation method thereof |
| CN108774507A (en) * | 2018-05-31 | 2018-11-09 | 钦州学院 | A kind of mixing fluid loss additive and preparation method thereof |
| CN108774508A (en) * | 2018-05-31 | 2018-11-09 | 广西大学 | A kind of starch base organosilicon fire-resistant fluid loss additive and preparation method thereof |
| CN108774505A (en) * | 2018-08-16 | 2018-11-09 | 张建华 | A kind of fluid loss additive for boring fluid and its preparation method and application |
| CN109097008A (en) * | 2018-08-09 | 2018-12-28 | 中国石油集团渤海钻探工程有限公司 | Without native phase high density saturated salt-water drilling fluid fluid loss additive and preparation method thereof |
| CN109825262A (en) * | 2019-02-22 | 2019-05-31 | 天津渤海中联石油科技有限公司 | A kind of drilling fluid compound film former and preparation method thereof |
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| CN102898585A (en) * | 2011-07-26 | 2013-01-30 | 四川仁智油田技术服务股份有限公司 | Preparation method of high temperature resistant drilling fluid filtrate reducer |
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Patent Citations (1)
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104927804A (en) * | 2015-05-06 | 2015-09-23 | 中国石油集团渤海钻探工程有限公司 | Heat resistance and salt tolerance polymer filtrate reducer and preparation method therefor |
| CN104927804B (en) * | 2015-05-06 | 2018-01-12 | 中国石油集团渤海钻探工程有限公司 | Heat Resistant and Salt Tolerant Polymer fluid loss additive and preparation method thereof |
| CN106939061A (en) * | 2017-03-15 | 2017-07-11 | 石家庄华莱鼎盛科技有限公司 | Fluid loss additive for boring fluid natural polymerses and preparation method thereof |
| CN108774507A (en) * | 2018-05-31 | 2018-11-09 | 钦州学院 | A kind of mixing fluid loss additive and preparation method thereof |
| CN108774508A (en) * | 2018-05-31 | 2018-11-09 | 广西大学 | A kind of starch base organosilicon fire-resistant fluid loss additive and preparation method thereof |
| CN109097008A (en) * | 2018-08-09 | 2018-12-28 | 中国石油集团渤海钻探工程有限公司 | Without native phase high density saturated salt-water drilling fluid fluid loss additive and preparation method thereof |
| CN108774505A (en) * | 2018-08-16 | 2018-11-09 | 张建华 | A kind of fluid loss additive for boring fluid and its preparation method and application |
| CN109825262A (en) * | 2019-02-22 | 2019-05-31 | 天津渤海中联石油科技有限公司 | A kind of drilling fluid compound film former and preparation method thereof |
| CN109825262B (en) * | 2019-02-22 | 2021-01-26 | 天津渤海中联石油科技有限公司 | Composite film forming agent for drilling fluid and preparation method thereof |
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Application publication date: 20150422 |