CN103555296B - Water retaining of the anti-composite salt polymkeric substance of drilling fluid high temperature resistance and preparation method thereof - Google Patents
Water retaining of the anti-composite salt polymkeric substance of drilling fluid high temperature resistance and preparation method thereof Download PDFInfo
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- CN103555296B CN103555296B CN201310543270.2A CN201310543270A CN103555296B CN 103555296 B CN103555296 B CN 103555296B CN 201310543270 A CN201310543270 A CN 201310543270A CN 103555296 B CN103555296 B CN 103555296B
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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
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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
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
Abstract
The present invention proposes water retaining of the anti-composite salt polymkeric substance of a kind of drilling fluid high temperature resistance and preparation method thereof.It is made up of the raw material of following weight percent: vinylformic acid 10-15%, sodium hydroxide 6-8.5%, deionized water 60-65%, acrylamide 4-8%, tetraphenyl ethylene sodium sulfonate 5-6%, NVP 6-8%, initiator 0.1-0.5%.Compared with prior art, the invention has the beneficial effects as follows that it can significantly reduce drilling fluid high-temperature high pressure filter loss, entirety improves the temperature resistance of drilling fluid system and anti-salt calcium contamination ability simultaneously.And by improvement of mud cake, improve permeability resume figure, available protecting hydrocarbon zone.Can 180 DEG C of high temperature and composite salt be resisted, can be used as deep-well, creep into the water retaining of saline bed and seawater drilling well.
Description
Technical field
The present invention relates to a kind of water retaining, particularly the water retaining and preparation method thereof of the anti-composite salt polymkeric substance of a kind of drilling fluid high temperature resistance.
Background technology
Along with the increase of the oil gas well drilling degree of depth, bottom temperature, pressure constantly raise, more and more higher to the requirement of additive for drilling fluid.Due to ultra deep well to bore the complex formation of chance, down-hole High Temperature High Pressure and working cycle long etc., drilling liquid technology is had higher requirement.The main difficult technical that high temperature ultra-deep well drilling liquid faces is as follows: the first, and drilling fluids at high temperature stability problem is particularly outstanding.Because under high temperature action, main organic agent in drilling fluid can go bad gradually, degrades and lose efficacy, as starch based treatment agent easily ferments when temperature is more than 120 DEG C, cellulose family and conventional high polymers class treatment agent will be degraded when temperature is more than 140 DEG C and be lost efficacy.Physics, the chemical action of these treatment agents under high temperature, finally cause change or the inefficacy of property of drilling fluid, and drilling engineering can be caused normally to carry out.The second, the drilling fluid rheology under high solid loading and leak-off are difficult to control.High reservoir pressure requires the necessary high-density of drilling fluid, and solid load is also quite high, and when solid particle size grating is unreasonable, makes drilling fluid rheology and the more difficult control of leak-off.For keeping the stable performance of high-temperature high-density drilling fluid, having to add the treatment agent of multiple higher concentration, but due to the high temperature complex reaction between all kinds for the treatment of agent, making property of drilling fluid be difficult to safeguard and regulation and control.3rd, often will bore and meet many cover pressure series of strata stratum, Safe Density window is narrow, and Formation bearing pressure is poor, collapses, leaks, the complexcase such as card coexist.In addition, the Wellbore Stability that the salt cream mud often run into mixes layer is more outstanding, and this anti-salt to drilling fluid, anticalcium, anti-solid phase pollution capacity are had higher requirement.
At home, high temperature ultra deep well quantity gets more and more in recent years.Water retaining is one of maximum additive for drilling fluid of consumption.For realize drilling operation safely and fast with higher comprehensive benefit, require that drilling fluid has suitable leak-off wall building properties, thus fluid loss agent become volume of production and marketing maximum, research and develop one of most active additive for drilling fluid.Can drilling fluid keep lower filter loss under Temperature Deep condition, and key will see that whether the temperature tolerance of fluid loss agent is good.For drill high calcium-containing stratum or with the drilling fluid of brine disposal, ensure that the performance of drilling fluid meets the requirements, the fluid loss agent of anti-salt calcium must be developed.
Summary of the invention
The present invention proposes water retaining of the anti-composite salt polymkeric substance of a kind of drilling fluid high temperature resistance and preparation method thereof, solve deficiency of the prior art, for the anti-salt of drilling fluid water retaining ubiquity of current domestic use, the defect of high-temperature resistance difference, with vinylformic acid, acrylamide, tetraphenyl ethylene sodium sulfonate and NVP (NVP) for modified monomer, synthesize high temperature resistance anti-composite salt tetrapolymer water retaining.
Technical scheme of the present invention is achieved in that the water retaining of the anti-composite salt polymkeric substance of a kind of drilling fluid high temperature resistance, it is made up of the raw material of following weight percent: vinylformic acid 10-15%, sodium hydroxide 6-8.5%, deionized water 60-65%, acrylamide 4-8%, tetraphenyl ethylene sodium sulfonate 5-6%, NVP 6-8%, initiator 0.1-0.5%.
Further, it is made up of the raw material of following weight percent: vinylformic acid 12-13%, sodium hydroxide 7-8%, deionized water 62-63%, acrylamide 5-7%, tetraphenyl ethylene sodium sulfonate 5.2-5.8%, NVP 6.5-7.5%, initiator 0.2-0.4%.
Further, it is made up of the raw material of following weight percent: vinylformic acid 12.2%, sodium hydroxide 7.2%, deionized water 62.3%, acrylamide 5.5%, tetraphenyl ethylene sodium sulfonate 5.5%, NVP 7%, initiator 0.3%.
Further, described initiator is redox initiation system.
Further, described redox initiation system is Persulphate-Bisulphite initiator system or persulphate-sulphite initiator system.
Further, the weight ratio that in described Persulphate-Bisulphite initiator system, persulphate and hydrosulphite add is 1:1.
Further, the weight ratio that in described persulphate-sulphite initiator system, persulphate and sulphite add is 1:1
Further, described persulphate is ammonium persulphate or Potassium Persulphate; Described hydrosulphite is sodium bisulfite; Described sulphite is S-WAT.
The preparation method of the water retaining of the anti-composite salt polymkeric substance of above-mentioned drilling fluid high temperature resistance, it comprises the following steps:
(1) 20-30% of initiator by deionized water weight is dissolved, stand-by;
(2) vinylformic acid is added in reactor, to add under cooled conditions in sodium hydroxide to reactor and pH value to 6.5-7.5, then add remaining deionized water, acrylamide, tetraphenyl ethylene sodium sulfonate and NVP successively, be heated with stirring to 55-65 DEG C;
(3) join in reactor by the initiator dissolved in step (1), insulated and stirred 7-9 hour at 55-65 DEG C, obtains water white transparency or pale yellow viscous liquid, continues insulated and stirred 1.5-2.5 hour at 55-65 DEG C, filling discharging.
Further, vinylformic acid adds in reactor in (2) by described step, adds in sodium hydroxide to reactor under cooled conditions and pH value to 7.0.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the drilling fluid high temperature resistance anti-composite salt polymkeric substance water retaining in the present invention, because of with functional groups such as lactam groups, has good temperature resistance, can resist 180 DEG C of high temperature;
(2) the drilling fluid high temperature resistance anti-composite salt polymkeric substance water retaining in the present invention carries the insensitive group of salt, so have good anti-salt calcium performance;
(3) the drilling fluid high temperature resistance anti-composite salt polymkeric substance water retaining in the present invention, by grain diameter grating in improvement system, strengthens filter cake compressibility thus reduces Permeability, improving permeability resume figure, significantly improving reservoir protection effect;
(4) the drilling fluid high temperature resistance anti-composite salt polymkeric substance water retaining in the present invention can effectively reduce drilling fluid system filter loss, good with conventional processing agent compatibleness, can meet deep-well, creep into the processing requirement of saline bed and seawater drilling well.
(5) the drilling fluid high temperature resistance anti-composite salt polymkeric substance water retaining in the present invention effectively can reduce frictional resistance, has good lubricity;
(6) drilling fluid high temperature resistance anti-composite salt polymkeric substance water retaining can reduce sticky shear force, little to other rheology impact of drilling fluid.
Embodiment
Be clearly and completely described the technical scheme in the present invention below, obviously, described embodiment is only several embodiments wherein of the present invention, 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 water retaining of 1.1 1 kinds of anti-composite salt polymkeric substance of drilling fluid high temperature resistance, it is made up of the raw material of following weight percent: vinylformic acid 12.2%, sodium hydroxide 7.2%, deionized water 62.3%, acrylamide 5.5%, tetraphenyl ethylene sodium sulfonate 5.5%, NVP 7%, initiator 0.3%.
Prepare the water retaining 1000kg of the anti-composite salt polymkeric substance of drilling fluid high temperature resistance of the present invention, concrete raw material and consumption are: vinylformic acid 122kg, sodium hydroxide 72kg, deionized water 623kg, acrylamide 55kg, tetraphenyl ethylene sodium sulfonate 55kg, NVP 7kg, initiator 3kg, wherein initiator is ammonium persulphate 1.5kg, S-WAT 1.5kg.
1.2 preparation processes:
(1) 130kg deionized water is added in reactor, stir, add ammonium persulphate and S-WAT, stir 0.5h, pump into test tank stand-by;
(2) vinylformic acid is added in reactor, add in sodium hydroxide to reactor under cooled conditions and pH value to 7, then remaining successively deionized water 493kg, acrylamide, tetraphenyl ethylene sodium sulfonate and NVP, be heated with stirring to 58 DEG C;
(3) slowly added in reactor by the initiator dissolved in step (1), at 58 DEG C, insulated and stirred 8 hours, obtains light yellow clear liquid, to continue at 58 DEG C insulated and stirred 2 hours, filling discharging.
Embodiment 2:
The water retaining of 2.1 1 kinds of anti-composite salt polymkeric substance of drilling fluid high temperature resistance, it is made up of the raw material of following weight percent: vinylformic acid 12.0%, sodium hydroxide 7.0%, deionized water 62.0%, acrylamide 7.0%, tetraphenyl ethylene sodium sulfonate 5.3%, NVP 6.5%, initiator 0.2%.
Prepare the water retaining 1000kg of the anti-composite salt polymkeric substance of drilling fluid high temperature resistance of the present invention, concrete raw material and consumption are: vinylformic acid 120kg, sodium hydroxide 70kg, deionized water 620kg, acrylamide 70kg, tetraphenyl ethylene sodium sulfonate 53kg, NVP 65kg, initiator 2kg, wherein initiator is Potassium Persulphate 1kg, sodium bisulfite 1kg.
2.2 preparation processes:
(1) 186kg deionized water is added in reactor, stir, add Potassium Persulphate and sodium bisulfite, stir 0.5h, pump into test tank stand-by;
(2) vinylformic acid is added in reactor, add in sodium hydroxide to reactor under cooled conditions and pH value to 6.5, then remaining successively deionized water 434kg, acrylamide, tetraphenyl ethylene sodium sulfonate and NVP, be heated with stirring to 65 DEG C;
(3) slowly added in reactor by the initiator dissolved in step (1), at 65 DEG C, insulated and stirred 7 hours, obtains light yellow clear liquid, to continue at 65 DEG C insulated and stirred 1.5 hours, filling discharging.
Embodiment 3:
The water retaining of 3.1 1 kinds of anti-composite salt polymkeric substance of drilling fluid high temperature resistance, it is made up of the raw material of following weight percent: vinylformic acid 15.0%, sodium hydroxide 8.5%, deionized water 60.0%, acrylamide 4.0%, tetraphenyl ethylene sodium sulfonate 5.6%, NVP 6.5%, initiator 0.4%.
Prepare the water retaining 1000kg of the anti-composite salt polymkeric substance of drilling fluid high temperature resistance of the present invention, concrete raw material and consumption are: vinylformic acid 150kg, sodium hydroxide 85kg, deionized water 600kg, acrylamide 40kg, tetraphenyl ethylene sodium sulfonate 56kg, NVP 65kg, initiator 4kg, wherein initiator is ammonium persulphate 2kg, sodium bisulfite 2kg.
3.2 preparation processes:
(1) 150kg deionized water is added in reactor, stir, add Potassium Persulphate and sodium bisulfite, stir 0.5h, pump into test tank stand-by;
(2) vinylformic acid is added in reactor, add in sodium hydroxide to reactor under cooled conditions and pH value to 7.5, then remaining successively deionized water 450kg, acrylamide, tetraphenyl ethylene sodium sulfonate and NVP, be heated with stirring to 60 DEG C;
(3) slowly added in reactor by the initiator dissolved in step (1), at 60 DEG C, insulated and stirred 9 hours, obtains light yellow clear liquid, continues insulation at 60 DEG C and stirs 2.5 hours, filling discharging.
The water retaining of gained in embodiment of the present invention 1-3 is done performance comparison with two kinds of water retainings of the prior art (i.e. water retaining A and water retaining B), obtains result as following table:
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the water retaining of the anti-composite salt polymkeric substance of drilling fluid high temperature resistance, it is characterized in that: it is made up of the raw material of following weight percent: vinylformic acid 10-15%, sodium hydroxide 6-8.5%, deionized water 60-65%, acrylamide 4-8%, sodium p styrene sulfonate 5-6%, NVP 6-8%, initiator 0.1-0.5%;
Described initiator is redox initiation system; Described redox initiation system is Persulphate-Bisulphite initiator system or persulphate-sulphite initiator system; The weight ratio that in described Persulphate-Bisulphite initiator system, persulphate and hydrosulphite add is 1:1; The weight ratio that in described persulphate-sulphite initiator system, persulphate and sulphite add is 1:1;
Its preparation method comprises the following steps:
(1) 20-30% of initiator by deionized water weight is dissolved, stand-by;
(2) vinylformic acid is added in reactor, to add under cooled conditions in sodium hydroxide to reactor and pH value to 6.5-7.5, then add remaining deionized water, acrylamide, sodium p styrene sulfonate and NVP successively, be heated with stirring to 55-65 DEG C;
(3) join in reactor by the initiator dissolved in step (1), insulated and stirred 7-9 hour at 55-65 DEG C, obtains water white transparency or pale yellow viscous liquid, continues insulated and stirred 1.5-2.5 hour at 55-65 DEG C, filling discharging.
2. the water retaining of the anti-composite salt polymkeric substance of drilling fluid high temperature resistance according to claim 1, it is characterized in that: it is made up of the raw material of following weight percent: vinylformic acid 12-13%, sodium hydroxide 7-8%, deionized water 62-63%, acrylamide 5-7%, sodium p styrene sulfonate 5.2-5.8%, NVP 6.5-7.5%, initiator 0.2-0.4%.
3. the water retaining of the anti-composite salt polymkeric substance of drilling fluid high temperature resistance according to claim 2, it is characterized in that: it is made up of the raw material of following weight percent: vinylformic acid 12.2%, sodium hydroxide 7.2%, deionized water 62.3%, acrylamide 5.5%, sodium p styrene sulfonate 5.5%, NVP 7%, initiator 0.3%.
4. the water retaining of the anti-composite salt polymkeric substance of drilling fluid high temperature resistance according to claim 1, is characterized in that: described persulphate is ammonium persulphate or Potassium Persulphate; Described hydrosulphite is sodium bisulfite; Described sulphite is S-WAT.
5. the preparation method of the water retaining of the anti-composite salt polymkeric substance of drilling fluid high temperature resistance according to claim 1, it is characterized in that: vinylformic acid adds in reactor in (2) by described step, add in sodium hydroxide to reactor under cooled conditions and pH value to 7.0.
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| CN104059623A (en) * | 2014-06-13 | 2014-09-24 | 中国石油集团渤海钻探工程有限公司 | High-temperature-resistant salt-resistant fluid loss agent and preparation method thereof |
| CN104892837A (en) * | 2015-05-29 | 2015-09-09 | 中国石油集团川庆钻探工程有限公司 | Preparation method of fluid loss agent for well-cementing cement slurry |
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| CN109054781B (en) * | 2018-08-19 | 2020-05-05 | 石家庄华莱鼎盛科技有限公司 | Diluent silicon ether polymer for drilling fluid and preparation method thereof |
| CN110028940B (en) * | 2019-04-30 | 2021-05-18 | 中国石油集团川庆钻探工程有限公司 | Strong-inhibition di-potassium amino ion polymer drilling fluid and preparation method thereof |
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