CN104045780A - High temperature resistant solid lubrication filtrate reducer for drilling fluid - Google Patents
High temperature resistant solid lubrication filtrate reducer for drilling fluid Download PDFInfo
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- CN104045780A CN104045780A CN201410240997.8A CN201410240997A CN104045780A CN 104045780 A CN104045780 A CN 104045780A CN 201410240997 A CN201410240997 A CN 201410240997A CN 104045780 A CN104045780 A CN 104045780A
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- polymerization
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- acrylamide
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Abstract
The invention relates to a high temperature resistant solid lubrication filtrate reducer for a drilling fluid. The high temperature resistant solid lubrication filtrate reducer is prepared through the following steps: 1, adding polymerization monomers into a reactor provided with water, and adding an alkaline substance to the obtained aqueous solution to adjust the pH value of the above polymerization system to 7, wherein the polymerization monomers comprise modified graphite, acrylamide, 2-acrylamide-2-methylpro panesulfonic acid and sulfonated lignin; 2adding an initiator into the polymerization system to initiate a polymerization reaction, wherein the addition amount of the initiator is 0.3-0.7% of the total amount of the polymerization monomers; and 3, shearing and granulating a copolymer obtained in step 2, drying, and crushing to obtain a product. The high temperature resistant solid lubrication filtrate reducer prepared through adopting aqueous solution polymerization has the advantages of easy control of the reaction process, simple operation, easy large-scale industrial production, stable quality, no pollution to the environment, and good compatibleness with routine drilling fluid treatment agents, and can meet process requirements of many drilling wells.
Description
Technical field
The present invention relates to a kind of drilling fluid water retaining, particularly high temperature resistance solid lubrication water retaining for a kind of drilling fluid.
Background technology
Along with the reduction of oil field available reserves, the increase of exploratory development difficulty, the difficulties such as unconventional oil gas, heavy oil tested layer, hypotonic ultra-low penetration reservoir, piedmont tectonic belts and marine oil and gas are employed Oil-gas Accumulation Types becomes the emphasis of exploitation.Drilling fluid is proposed to following requirement: 1, oilness is good, and hole structure, taking orientation well, horizontal well, extended reach well and multilateral well etc. as main, accounts for the more than 70% of recent years plan drilling well number, improve the probability of oilness reduction pressure differential sticking; 2, low dehydration and good shutoff keep wellbore stability, have micro-cracks in stratum, and the intrusion of drilling fluid filtrate causes clay mineral hydration swelling wherein, easily causes borehole well instability; 3, good contamination resistance, under deep-well, ultra deep well condition, the complex geological conditions such as saline bed, halite layer and brea bed occur frequent, under high-temperature and high-pressure conditions, can resist various pollutions.
Because the main adjustable factor that affects drilling well moment of torsion and resistance and drilling tool wearing and tearing is the lubricity of drilling fluid, therefore the lubricity of drilling fluid is to reducing the down hole problems such as bit freezing, ensureing that drilling well safely and fast plays vital effect.At present, the conventional method of improving drilling fluid lubricating performance, is mainly the oilness by rationally making with lubricator to reduce the coefficient of friction resistance and strengthening mud cake by improvement of mud cake.Since the eighties, lubricant for drilling fluid development is both at home and abroad than very fast, and kind mainly contains two classes, i.e. solid kind and liquid type.The former is as plastic pellet, glass pellet etc.Plastic pellet, this class solid lubricant of glass pellet, owing to being subject to the restriction of solids size, are easy to be removed by solid control equipment in drilling process, and under the extruding or beating of drilling rod, have the possibility of destruction, distortion; For the lubricant of liquid type, although easy to use, most additive for drilling fluid is all solid, so the packaging of liquid, transport and storage exist many restrictions.And the lubricant properties of these liquid is single, only can lubricate, obviously improving drilling fluid, to fall the lubricant of leak-off also rarely found.
Summary of the invention
Object of the present invention is exactly in view of the foregoing defects the prior art has, and a kind of drilling fluid high temperature resistance solid lubrication water retaining is provided.
High temperature resistance solid lubrication water retaining for a kind of drilling fluid, its preparation method, comprises following preparation process:
(1) polymerization single polymerization monomer is added in the reactor that fills water, described polymerization single polymerization monomer is modified graphite, acrylamide, 2-acrylamide-2-methyl propane sulfonic and sulfonated lignin; In this aqueous solution, add alkaline matter to regulate the pH value of polymerization system for neutral;
(2) in polymerization system, add initiator, consumption accounts for the 0.3-0.7% of polymerization single polymerization monomer total amount, initiated polymerization;
(3) by the multipolymer shear granulation, oven dry, the pulverizing that obtain in step (2), obtain product;
Polymerization single polymerization monomer add-on in step (1), the weight ratio of the add-on of modified graphite and other monomers is 1: (1 ~ 3);
The weight ratio of the add-on of acrylamide, 2-acrylamide-2-methyl propane sulfonic and sulfonated lignin in step (1) is 1: (1 ~ 3): (2 ~ 5);
Initiator is selected from the one in Potassium Persulphate, ammonium persulphate, hydrogen peroxide.
Being made by following methods of above-mentioned modified graphite: get 1 50mL porcelain crucible, clean and be placed in baking oven with distilled water, dry 1.5h at 120 DEG C, then in moisture eliminator, be cooled to room temperature, accurately take 10g natural graphite scale sample and be placed in porcelain crucible, porcelain crucible is placed in to retort furnace, at 400 DEG C, burns 0.5h, taking-up, in moisture eliminator, be cooled to room temperature.
The temperature of the polyreaction in above-mentioned step (2) is 50 ~ 70 DEG C; The pH value of described polymerization system is 6 ~ 9.
The time of the polyreaction in above-mentioned step (2) is 60 ~ 120 minutes.
The present invention forms through chemistry or electrochemical treatment the expandable structure material that specific surface is large, adsorptive power is strong by the raw material with excellent property.This material not only can be converted into solid by fluent material good lubricity, and all right improvement of mud cake and compactness, reduce the amount that filtrate enters stratum.Product can be sneaked in water-base drilling fluid easily, the coefficient of friction resistance value similar with oil-base mud is provided, the dosage with the performance, particularly this lubricated water retaining of good reduction API filtration and HTHP filter loss will be far smaller than lubricant in the on-the-spot mud of current use and the amount of water retaining.Lubricated and low leak-off is the omnidistance performance needing of wellbore construction, and we can both take into account by the high temperature resistance solid lubrication water retaining of research and development, thereby makes the application of site disposal agent to simplifying future development.
Owing to adopting natural material, this high temperature resistance solid lubrication water retaining will be nontoxic, biodegradable environment-friendly type treatment agent.Up to the present the domestic this solid lubricant that had not only had oilness but also had a filtration reduction still belongs to blank; therefore, this cheap, environmental protection, be convenient to transport, also there is the requirement that the research of high temperature resistance solid lubrication water retaining of several functions and successful Application must adapt to the needs of drilling engineering and meet environment protection.
The invention has the beneficial effects as follows: (1) AMPS/AM/SL-Ca/ modified graphite of the present invention graft copolymer not only has enhancing drilling fluid lubricating but also have the performance that reduces drilling fluid high-temperature high pressure filter loss under hot conditions, improve saline-alkaline tolerance simultaneously, made product there is superperformance under high temperature (180 DEG C) high salt (saturated brine) condition; (2) the present invention adopts aqueous solution polymerization, and reaction process is easy to control, simple to operate, is easy to large-scale industrial production, constant product quality, environmentally safe, owing to having introduced cheap sulfonated lignin and reduced the raw materials cost of polymkeric substance, the popularization of strong and product; (3) well liquid of the present invention is better by the compatibleness of solid lubrication water retaining and conventional drilling liquid treatment agent, can meet the processing requirement of multiple drilling well.
Embodiment
Embodiment 1: high temperature resistance solid lubrication water retaining for the drilling fluid that the present invention mentions, its preparation method, comprises following preparation process:
(1) polymerization single polymerization monomer is added in the reactor that fills water, described polymerization single polymerization monomer is modified graphite, acrylamide, 2-acrylamide-2-methyl propane sulfonic and sulfonated lignin; In this aqueous solution, add alkaline matter to regulate the pH value of polymerization system for neutral;
(2) in polymerization system, add initiator, consumption accounts for the 0.3-0.7% of polymerization single polymerization monomer total amount, initiated polymerization;
(3), by the multipolymer shear granulation, oven dry, the pulverizing that obtain in step (2), obtain AMPS/AM/SL-Ca/ modified graphite graft copolymer;
Polymerization single polymerization monomer add-on in step (1), the weight ratio of the add-on of modified graphite and other monomers is 1: (1 ~ 3);
The weight ratio of the add-on of acrylamide, 2-acrylamide-2-methyl propane sulfonic and sulfonated lignin in step (1) is 1: (1 ~ 3): (2 ~ 5);
Initiator is selected from the one in Potassium Persulphate, ammonium persulphate, hydrogen peroxide.
Being made by following methods of above-mentioned modified graphite: get 1 50mL porcelain crucible, clean and be placed in baking oven with distilled water, dry 1.5h at 120 DEG C, then in moisture eliminator, be cooled to room temperature, accurately take 10g natural graphite scale sample and be placed in porcelain crucible, porcelain crucible is placed in to retort furnace, at 400 DEG C, burns 0.5h, taking-up, in moisture eliminator, be cooled to room temperature.
The temperature of the polyreaction in above-mentioned step (2) is 50 ~ 70 DEG C; The pH value of described polymerization system is 6 ~ 9.
The time of the polyreaction in above-mentioned step (2) is 60 ~ 120 minutes.
Embodiment 2, the preparation of modified graphite, makes with reference to the making method of embodiment 1.Modified graphite wetting ability of the present invention is evaluated:
Natural graphite scale sample after treatment is moved into after distilled water, graphite scale slowly sinks, and in liquid phase, disperse gradually in sinking process, after vigorous stirring number minute, sample dispersion is to whole liquid phase, after stopping stirring, through after a while, most of sample sinks under water equably.
The preparation method of high temperature resistance solid lubrication water retaining for drilling fluid:
Initiator is dissolved by 25% of deionized water weight, stand-by; In proportion the 2-acrylamide-2-methyl propane sulfonic aqueous solution is added in reactor, under cooling conditions, add sodium hydroxide in reactor and pH value to 7.0, then add successively in proportion acrylamide, calcium lignin sulphonate, modified graphite, be heated with stirring to 60 DEG C; The initiator of dissolving is joined in reactor, and at 60 DEG C, insulated and stirred 1.5 hours, obtains brown thick liquid, remains at this temperature and carries out polyreaction 5 hours, dries, pulverizes, and obtains AMPS/AM/SL-Ca/ modified graphite graft copolymer.
The detection method of property of drilling fluid:
The detection of drilling fluid rheology performance is used Fann35A type viscometer to carry out at ambient temperature, measures successively 600r/min, 300 r/min, and 200 r/min, 100 r/min, 6 r/min, the reading of 3 r/min is designated as respectively:
Φ 600,
Φ 300,
Φ 200,
Φ 100,
Φ 6,
Φ 3reading, according to following formula computational plasticity viscosity and yield value:
Apparent viscosity (AV)=1/2 (
Φ 600);
Plastic viscosity (PV)=
Φ 600–
Φ 300;
Yield value (YP)=1/2 (
Φ 300– PV).
The detection of wellbore liquid leaching loss performance:
The detection of wellbore liquid leaching loss performance is carried out according to the following step:
Block the aperture of pressure filter joint with finger, oil base drilling fluid is poured in pressure filter, make liquid level higher than scale marks in cup and be l centimetre apart from distance from top, put O RunddichtringO well, pave filter paper, tighten bowl cover, then pressure filter is communicated with Y-junction, and measuring graduates is placed on below press filtration instrument spout.Pressurization timing rapidly, institute's plus-pressure is 0.7 MPa.Pressure source can be used nitrogen, carbon dioxide or pressurized gas, forbidding oxygen.In the time of time to 30 of leaching minute, the residual drop on filtration device spout is collected in graduated cylinder, remove graduated cylinder, read and record the volume (unit is mL) of gathered filtrate.
The detection of drilling fluid high temperature resistant property:
Drilling fluid is poured in high temperature ageing tank into aging 16h under 180 DEG C of conditions, rheological and the filtration property of testing afterwards drilling fluid.
The detection of drilling fluid lubricating performance:
(1) slide block (wide near axle center, but contact with axle center) is correctly installed, is opened motor 300r/min, idle running 15min, then adjusting rotary speed 70r/min, stable after pass motor; (2) adding distil water in sample cup, drives motor, idle running 5min(70r/min); (3) regulate the yellow pointer zero of dial torque wrench 16.95N.m(, blue pin at 16.95N.m), after pressurization, rotating speed is adjusted to 60r/min, unclamps dial torque wrench, then zeroing after stablizing.Be pressurized to 16.95N.m and turn 5min, meter reading should be in 28 ~ 48(± 3) in scope; (4) unclamp torque spanner, disable motor, outwells distilled water, dries test ring, test block surface, packs testing sample into and enters test cup, drives motor, and pressurization 16.95 N.m, (60r/min), turn 5min, read instrument K value; (5) should sample of every survey all apply distilled water and calibrate once, the distilled water coefficient of friction resistance 28 ~ 48(± 3), should not continue break-in.
Lubricating coefficient reduced rate=(K
base slurry-K
sample slurry)/K
base slurry× 100%
The detection of drilling fluid adhesion property:
On drilling fluid bowl strainer, put in order filter paper, rubber ring and nylon ring well, filter screen is pressed on nylon ring and is screwed with U-shaped spanner.Lower UNICOM valve rod is screwed in the screw of drilling fluid cup bottom and tightened.Four of the four hole alignment bracket in drilling fluid cup bottom are shadowed, cup is placed on the cup of support.Get the drilling fluid sample stirring and pour drilling fluid cup into groove place.Bowl cover is installed also to be screwed with pressure rod and hook spanner.On drilling fluid bowl cover, install UNICOM's valve rod, airline hose agent three-way component is loaded on UNICOM's valve rod, inserts mortise pin and is fixed, and close UNICOM's valve rod and three-way component purging valve.Regulating adjusting pressuring handle output pressure is 3.5MPa, opens UNICOM's valve rod, rotates counterclockwise 1/4 circle, and making drilling fluid cup internal pressure is 3.5MPa.25ml graduated cylinder is placed in to lower UNICOM valve rod below, then opens counterclockwise lower UNICOM valve rod 1/4 circle and start timing.Leak-off is complete, fastens rack beam firmly adhesion dish is depressed with pressure rod, makes the interior filter cake of adhesion dish and cup sticky real.The pressure regulation of rotation manifold regulating handle is to required pressure, and under the effect of air pressure, piston of air inflator is depressed adhesion dish, with sticky real maintenance for some time of filter cake.Unclamp manifold adjusting pressuring handle, rotation venting valve rod, emits the residual air in pressure tank, takes off pressure tank.After adhesion dish and filter cake glue in fact, close source of the gas main valve, after sticky reality 5 minutes or longer time, first torque meter pointer is adjusted to zero-bit, torque meter is connected with adhesion dish, between pressure rod card and support, holds torque meter, slowly exert oneself, measure the maximum torque producing when adhesion dish and filter cake start to slide.Generally, within every 5 minutes, use torque meter replicate measurement, until moment of torsion reaches maximum value, record torque value.
Sticking coefficient reduced rate=(K
base slurry-K
sample slurry)/K
base slurry× 100%
Drilling fluid lubricating Evaluation results under the different dosages of table 1 solid lubrication water retaining
Drilling fluid rheology and filtrate-loss control energy evaluation result under the different dosages of table 2 solid lubrication water retaining
Table 3 180 DEG C/16h drilling fluid lubricating and filtrate-loss control energy evaluation result
Table 4 saturated salt-water drilling fluid lubricates and filtrate-loss control energy evaluation result
From above data, use the drilling fluid system of the solid lubrication water retaining of preparation to show superior performance, show high lubricating effect, sticking coefficient is low, filter loss is low, and through after 180 DEG C of high temperature ageings 16 hours, the performance of drilling fluid system still remains on good level, illustrates that prepared solid lubrication water retaining has very strong high-temperature resistance.
Embodiment 3, the polymerization single polymerization monomer add-on in step (1), the weight ratio of the add-on of modified graphite and other monomers is 1: 3;
The weight ratio of the add-on of acrylamide, 2-acrylamide-2-methyl propane sulfonic and sulfonated lignin in step (1) is 1: 1: 2.
Embodiment 4, the polymerization single polymerization monomer add-on in step (1), the weight ratio of the add-on of modified graphite and other monomers is 1: 2;
The weight ratio of the add-on of acrylamide, 2-acrylamide-2-methyl propane sulfonic and sulfonated lignin in step (1) is 1: 2: 4.
Claims (4)
1. a high temperature resistance solid lubrication water retaining for drilling fluid, is characterized in that comprising following preparation process:
(1) polymerization single polymerization monomer is added in the reactor that fills water, described polymerization single polymerization monomer is modified graphite, acrylamide, 2-acrylamide-2-methyl propane sulfonic and sulfonated lignin; In this aqueous solution, add alkaline matter to regulate the pH value of polymerization system for neutral;
(2) in polymerization system, add initiator, consumption accounts for the 0.3-0.7% of polymerization single polymerization monomer total amount, initiated polymerization;
(3) by the multipolymer shear granulation, oven dry, the pulverizing that obtain in step (2), obtain product;
Polymerization single polymerization monomer add-on in step (1), the weight ratio of the add-on of modified graphite and other monomers is 1: (1 ~ 3);
The weight ratio of the add-on of acrylamide, 2-acrylamide-2-methyl propane sulfonic and sulfonated lignin in step (1) is 1: (1 ~ 3): (2 ~ 5);
Initiator is selected from the one in Potassium Persulphate, ammonium persulphate, hydrogen peroxide.
2. high temperature resistance solid lubrication water retaining for drilling fluid according to claim 1, it is characterized in that: being made by following methods of described modified graphite: get 1 50mL porcelain crucible, clean and be placed in baking oven with distilled water, dry 1.5h at 120 DEG C, then in moisture eliminator, be cooled to room temperature, accurately take 10g natural graphite scale sample and be placed in porcelain crucible, porcelain crucible is placed in to retort furnace, at 400 DEG C, burn 0.5h, taking-up, in moisture eliminator, be cooled to room temperature.
3. high temperature resistance solid lubrication water retaining for drilling fluid according to claim 1, is characterized in that: the temperature of the polyreaction in described step (2) is 50 ~ 70 DEG C; The pH value of described polymerization system is 6 ~ 9.
4. high temperature resistance solid lubrication water retaining for drilling fluid according to claim 1, is characterized in that: the time of the polyreaction in described step (2) is 60 ~ 120 minutes.
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Cited By (7)
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| CN105199682A (en) * | 2015-10-21 | 2015-12-30 | 西安长庆化工集团有限公司 | Strongly adsorbent solid lubricant for drilling fluid and synthesis method of solid lubricant |
| CN106432595A (en) * | 2015-08-12 | 2017-02-22 | 中国石油化工股份有限公司 | Low-friction filtrate reducer and preparation method and application thereof |
| CN107033860A (en) * | 2017-04-28 | 2017-08-11 | 中国石油集团渤海钻探工程有限公司 | A kind of potassium chloride polymer drilling fluid |
| CN107118749A (en) * | 2017-04-28 | 2017-09-01 | 中国石油集团渤海钻探工程有限公司 | A kind of potassium chloride polymer drilling fluid multiple-effect fluid loss additive and preparation method thereof |
| CN114085654A (en) * | 2020-08-24 | 2022-02-25 | 中石化石油工程技术服务有限公司 | Modified graphite treating agent for drilling fluid and preparation method thereof |
| CN114686183A (en) * | 2020-12-25 | 2022-07-01 | 中石化石油工程技术服务有限公司 | Lubricating plugging fluid loss additive for drilling fluid and preparation method thereof |
| CN115991977A (en) * | 2021-10-18 | 2023-04-21 | 中石化石油工程技术服务有限公司 | Raw material composition, filtrate reducer for drilling fluid, and preparation method and application thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106432595A (en) * | 2015-08-12 | 2017-02-22 | 中国石油化工股份有限公司 | Low-friction filtrate reducer and preparation method and application thereof |
| CN106432595B (en) * | 2015-08-12 | 2018-11-02 | 中国石油化工股份有限公司 | A kind of low frictional resistance fluid loss additive and its preparation method and application |
| CN105199682A (en) * | 2015-10-21 | 2015-12-30 | 西安长庆化工集团有限公司 | Strongly adsorbent solid lubricant for drilling fluid and synthesis method of solid lubricant |
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| CN107033860A (en) * | 2017-04-28 | 2017-08-11 | 中国石油集团渤海钻探工程有限公司 | A kind of potassium chloride polymer drilling fluid |
| CN107118749A (en) * | 2017-04-28 | 2017-09-01 | 中国石油集团渤海钻探工程有限公司 | A kind of potassium chloride polymer drilling fluid multiple-effect fluid loss additive and preparation method thereof |
| CN114085654A (en) * | 2020-08-24 | 2022-02-25 | 中石化石油工程技术服务有限公司 | Modified graphite treating agent for drilling fluid and preparation method thereof |
| CN114085654B (en) * | 2020-08-24 | 2023-07-21 | 中石化石油工程技术服务有限公司 | Modified graphite treating agent for drilling fluid and preparation method thereof |
| CN114686183A (en) * | 2020-12-25 | 2022-07-01 | 中石化石油工程技术服务有限公司 | Lubricating plugging fluid loss additive for drilling fluid and preparation method thereof |
| CN114686183B (en) * | 2020-12-25 | 2023-09-12 | 中石化石油工程技术服务有限公司 | Lubricating plugging filtrate reducer for drilling fluid and preparation method thereof |
| CN115991977A (en) * | 2021-10-18 | 2023-04-21 | 中石化石油工程技术服务有限公司 | Raw material composition, filtrate reducer for drilling fluid, and preparation method and application thereof |
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Effective date of registration: 20161227 Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant after: Well Logging Co., Ltd. of SINOPEC Shengli Petroleum Administration Bureau Applicant after: Drilling Engineering Technology Co., Ltd., Sinopec Victory Petroleum Engineering Co., Ltd. Address before: 257000 Dongying, Shandong, No. 7 drilling Road, No. Applicant before: Zhang Haiqing |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140917 |