CN105294945A - Fluid loss additive for drilling fluid and preparation method of fluid loss additive - Google Patents
Fluid loss additive for drilling fluid and preparation method of fluid loss additive Download PDFInfo
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- CN105294945A CN105294945A CN201510847269.8A CN201510847269A CN105294945A CN 105294945 A CN105294945 A CN 105294945A CN 201510847269 A CN201510847269 A CN 201510847269A CN 105294945 A CN105294945 A CN 105294945A
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Abstract
The invention discloses a fluid loss additive for a drilling fluid and a preparation method of the fluid loss additive, and mainly relates to the field of the drilling fluid. The fluid loss additive is prepared from the following raw materials by weight: 90 to 110 parts of distilled water, 170 to 190 parts of acrylamide, 170 to 190 parts of acrylic acid, 90 to 100 parts of large basic ions, 105 to 135 parts of AMPS, 110 to 130 parts of soda, 3 to 5 parts of sodium persulfate, 3 to 5 parts of hydrogen peroxide, and 2.5 to 4 parts of an initiator V-50. The fluid loss additive is an acrylamide fluid loss additive which can be used in a salt water or saturated salt water drilling fluid system, and is relatively high in fluid loss reducing performance even under a high-salt high-temperature condition.
Description
Technical field
The present invention relates to a kind of fluid loss additive for boring fluid.
Background technology
In drilling process, the leak-off of drilling fluid is inevitable, and can form the filter cake protection borehole wall by leak-off.But drilling fluid filtration is excessive, easily causes mud shale expansion and cave in, filter cake thickens and hole diameter is reduced simultaneously, causes larger moment of torsion to the drilling tool rotated, easily causes pressure differential sticking.Therefore, suitably controlling filter loss is one of key property of drilling fluid.In drilling operation, conventional interpolation fluid loss agent of selecting plays stable colloid particle, improves filtrate viscosity, and the effect of trapping and blocking (filter cake) hole, thus obtains appropriate filter loss.
At present, in the development of at home and abroad all kinds fluid loss agent, acrylamide copolymer is as the important class of water-soluble polymers, with the performance that it is excellent, lower synthesis cost, and good thickening, the effects such as resistance, flocculation are fallen, be day by day subject to the attention of a domestic and international oil personage.But domestic and international years of researches progress shows, acrylamide copolymer main drawback is: shear stability is poor, salt tolerance is poor, poor heat stability and Heat-stable poor.Therefore how to choose suitable reagent, the intrinsic weakness of acrylamide copolymer is changed by effects such as polymerization, modifications, improving its heatproof, alkaline-resisting, anti-shear performance, and make it show the controlling more superior to filter loss, is the emphasis that industry technician continues to optimize innovation.
Summary of the invention
The object of the present invention is to provide a kind of fluid loss additive for boring fluid, it is a kind of acrylic amide fluid loss agent that can be used in salt solution or saturated salt-water drilling fluid system, under high salt hot conditions, still can have good filtrate loss controllability.
The present invention for achieving the above object, is achieved through the following technical solutions:
A kind of fluid loss additive for boring fluid, be made up of the raw material of following weight part: distilled water 90 ~ 110 parts, acrylamide 170 ~ 190 parts, 170 ~ 190 parts, vinylformic acid, macrocation (cationic polyamine Methacrylamide CPAM) 90 ~ 110 parts, AMPS (2-acrylamide-2-methyl propane sulfonic) 105 ~ 135 parts, soda ash 110 ~ 130 parts, 3 ~ 5 parts, hydrogen persulfate sodium, 3 ~ 5 parts, hydrogen peroxide, V-50 initiator 2.5 ~ 4 parts.
Preferably, be made up of the raw material of following weight part: distilled water 100 parts, acrylamide 180 parts, 180 parts, vinylformic acid, macrocation 100 parts, AMPS120 part, soda ash 120 parts, 4 parts, hydrogen persulfate sodium, 4 parts, hydrogen peroxide, V-50 initiator 3 parts.
Described acrylamide, vinylformic acid, macrocation, AMPS, V-50 initiator etc. all can conventional purchase obtain from the market.
The dosage of described a kind of fluid loss additive for boring fluid in fresh-water drilling fluid is 0.2 ~ 0.4%, and the dosage in unsaturated salt-water drilling fluid is 0.5 ~ 1.0%, and the dosage in saturated salt-water drilling fluid is 1 ~ 1.5%.
The preparation method of described a kind of fluid loss additive for boring fluid: by distilled water, acrylamide, vinylformic acid, macrocation, AMPS mix and blend, and slowly add soda ash, stirring and dissolving is to bubble-free; Under the nitrogen atmosphere continued, reaction 10min, adds Sodium Persulfate, and reaction 10min, adds hydrogen peroxide, and reaction 10min, adds V-50 initiator, react after ten minutes, continues polyreaction, namely obtains fluid loss additive for boring fluid after having reacted.
The preparation method of a kind of fluid loss additive for boring fluid described in optimization is as follows: by distilled water 90 ~ 110 parts, acrylamide 170 ~ 190 parts, 170 ~ 190 parts, vinylformic acid, macrocation 90 ~ 110 parts, AMPS105 ~ 135 part mix and blend, and slowly adding soda ash 110 ~ 130 parts, stirring and dissolving is to bubble-free; Under the nitrogen atmosphere continued, reaction 10min, adds Sodium Persulfate 3 ~ 5 parts, reaction 10min, add 3 ~ 5 parts, hydrogen peroxide, reaction 10min, adds V-50 initiator 2.5 ~ 4 parts, react after ten minutes, continue polyreaction, after having reacted, namely obtain fluid loss additive for boring fluid.
Contrast prior art, beneficial effect of the present invention is:
Choose acrylamide and acroleic acid polymerization, by adding the reaction reagent such as macrocation, APMS, modification is carried out to polymkeric substance, make it have salt tolerant, heatproof and anti-shear performance, and the feature that filtrate reducing is effective, effective filtrate reducing effect can be played under the Various Complex conditions such as fresh water, seawater and saturated saltwater mud system.
Embodiment
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Instrument, reagent, material etc. involved in following embodiment, unless otherwise noted, be existing conventional instrument, reagent, material etc. in prior art, obtain by regular commercial sources.Experimental technique involved in following embodiment, detection method etc., unless otherwise noted, are existing normal experiment method in prior art, detection method etc.
Embodiment 1: prepare fluid loss additive for boring fluid, preparation method is as follows:
Distilled water 100kg, acrylamide 180kg, vinylformic acid 180kg, macrocation 100kg, AMPS120kg are added in enamel stirring tank and stirs, slowly add soda ash 120kg stirring and dissolving, until be dissolved into bubble-free.The material dissolved is squeezed in polymeric kettle, inflated with nitrogen 10min, add hydrogen persulfate sodium 4kg, continue inflated with nitrogen 10min, add hydrogen peroxide 4kg, then inflated with nitrogen 10min, add V-50 initiator 3kg and continue inflated with nitrogen 10min closedown vent valve, nitrogen switch, wait to be polymerized.After range estimation polymerization completes, open flap type, air compressor, discharging; Open tablets press simultaneously, fluidized-bed carries out drying.By dried crushing material.
To using the obtained fluid loss additive for boring fluid of aforesaid method to carry out performance index judgement, concrete grammar is as follows:
Moisture: the weighing bottle being used in 105 DEG C ± 2 DEG C of known quality, takes about 3g ~ 4g sample accurately to 0.001g, is put in after drying 4h in 105 DEG C ± 2 DEG C baking ovens and takes out, and weigh after putting into moisture eliminator cooling 30min immediately, moisture is calculated as follows:
In formula: W---moisture, %;
M
2---sample and weighing bottle quality, unit is (g);
M
3---sample and weighing bottle quality after dry, unit is (g);
M
1---weighing bottle quality, unit is (g).
Screen over-size: take 50g (claiming accurate to 0.01g), being placed on aperture is in 0.9mm standard sieve, and immediately with hand dynamic, bounce standard sieve till sample no longer leaks down, weigh the quality of screenings, screen over-size is calculated as follows:
In formula: F---screen over-size, %;
M
4---screenings quality, unit is (g);
M---sample mass, unit is (g).
By test, its physicochemical property and performance index as shown in the table:
As seen from the above table, the present invention can be applicable to the drilling fluid system of salt solution or saturated brine, significantly improves anti-salt, heat-resisting property, has good controllability to filter loss, is that one is widely used, the fluid loss agent that filtrate loss controllability is good.
Claims (8)
1. a fluid loss additive for boring fluid, it is characterized in that: be made up of the raw material of following weight part: distilled water 90 ~ 110 parts, acrylamide 170 ~ 190 parts, 170 ~ 190 parts, vinylformic acid, macrocation 90 ~ 110 parts, AMPS105 ~ 135 part, soda ash 110 ~ 130 parts, 3 ~ 5 parts, hydrogen persulfate sodium, 3 ~ 5 parts, hydrogen peroxide, V-50 initiator 2.5 ~ 4 parts.
2. a kind of fluid loss additive for boring fluid according to claim 1, it is characterized in that: be made up of the raw material of following weight part: distilled water 100 parts, acrylamide 180 parts, 180 parts, vinylformic acid, macrocation 100 parts, AMPS120 part, soda ash 120 parts, 4 parts, hydrogen persulfate sodium, 4 parts, hydrogen peroxide, V-50 initiator 3 parts.
3. a kind of fluid loss additive for boring fluid according to any one of claim 1 ~ 2, it is characterized in that: be polymerized by the following method obtained: by distilled water, acrylamide, vinylformic acid, macrocation, AMPS mix and blend, and slowly adding soda ash, stirring and dissolving is to bubble-free; Under the nitrogen atmosphere continued, reaction 10min, adds Sodium Persulfate, and reaction 10min, adds hydrogen peroxide, and reaction 10min, adds V-50 initiator, react after ten minutes, continues polyreaction, namely obtains fluid loss additive for boring fluid after having reacted.
4. a kind of fluid loss additive for boring fluid according to any one of claims 1 to 3, it is characterized in that: be polymerized by the following method obtained: distilled water 100kg, acrylamide 180kg, vinylformic acid 180kg, macrocation 100kg, AMPS120kg are added in enamel stirring tank and stir, slowly add soda ash 120kg stirring and dissolving, until be dissolved into bubble-free; The material dissolved is squeezed in polymeric kettle, inflated with nitrogen 10min, add hydrogen persulfate sodium 4kg, continue inflated with nitrogen 10min, add hydrogen peroxide 4kg, then inflated with nitrogen 10min, add V-50 initiator 3kg and continue inflated with nitrogen 10min closedown vent valve, nitrogen switch, wait to be polymerized; After range estimation polymerization completes, open flap type, air compressor, discharging; Open tablets press simultaneously, fluidized-bed carries out drying; By dried crushing material.
5. a kind of fluid loss additive for boring fluid according to any one of Claims 1 to 4, it is characterized in that: the dosage of described a kind of fluid loss additive for boring fluid in fresh-water drilling fluid is 0.2 ~ 0.4%, dosage in unsaturated salt-water drilling fluid is 0.5 ~ 1.0%, and the dosage in saturated salt-water drilling fluid is 1 ~ 1.5%.
6. the preparation method of a kind of fluid loss additive for boring fluid according to any one of Claims 1 to 5, it is characterized in that: by distilled water, acrylamide, vinylformic acid, macrocation, AMPS mix and blend, and slowly adding soda ash, stirring and dissolving is to bubble-free; Under the nitrogen atmosphere continued, reaction 10min, adds Sodium Persulfate, and reaction 10min, adds hydrogen peroxide, and reaction 10min, adds V-50 initiator, react after ten minutes, continues polyreaction, namely obtains fluid loss additive for boring fluid after having reacted.
7. preparation method according to claim 6, it is characterized in that: by distilled water 90 ~ 110 parts, acrylamide 170 ~ 190 parts, 170 ~ 190 parts, vinylformic acid, macrocation 90 ~ 110 parts, AMPS105 ~ 135 part mix and blend, and slowly adding soda ash 110 ~ 130 parts, stirring and dissolving is to bubble-free; Under the nitrogen atmosphere continued, reaction 10min, adds Sodium Persulfate 3 ~ 5 parts, reaction 10min, add 3 ~ 5 parts, hydrogen peroxide, reaction 10min, adds V-50 initiator 2.5 ~ 4 parts, react after ten minutes, continue polyreaction, after having reacted, namely obtain fluid loss additive for boring fluid.
8. preparation method according to claim 6, it is characterized in that: distilled water 100kg, acrylamide 180kg, vinylformic acid 180kg, macrocation 100kg, AMPS120kg are added in enamel stirring tank and stirs, slowly add soda ash 120kg stirring and dissolving, until be dissolved into bubble-free; The material dissolved is squeezed in polymeric kettle, inflated with nitrogen 10min, add hydrogen persulfate sodium 4kg, continue inflated with nitrogen 10min, add hydrogen peroxide 4kg, then inflated with nitrogen 10min, add V-50 initiator 3kg and continue inflated with nitrogen 10min closedown vent valve, nitrogen switch, wait to be polymerized; After range estimation polymerization completes, open flap type, air compressor, discharging; Open tablets press simultaneously, fluidized-bed carries out drying; By dried crushing material.
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| CN201510847269.8A CN105294945A (en) | 2015-11-26 | 2015-11-26 | Fluid loss additive for drilling fluid and preparation method of fluid loss additive |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111560099A (en) * | 2020-06-23 | 2020-08-21 | 濮阳中原三力实业有限公司 | Composite fluid loss additive for well drilling and preparation method thereof |
| CN116102678A (en) * | 2022-12-23 | 2023-05-12 | 中国石油天然气集团有限公司 | Salt-tolerant drag reducer, preparation method thereof, salt-tolerant slickwater and application thereof |
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- 2015-11-26 CN CN201510847269.8A patent/CN105294945A/en active Pending
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111560099A (en) * | 2020-06-23 | 2020-08-21 | 濮阳中原三力实业有限公司 | Composite fluid loss additive for well drilling and preparation method thereof |
| CN116102678A (en) * | 2022-12-23 | 2023-05-12 | 中国石油天然气集团有限公司 | Salt-tolerant drag reducer, preparation method thereof, salt-tolerant slickwater and application thereof |
| CN116102678B (en) * | 2022-12-23 | 2024-05-03 | 中国石油天然气集团有限公司 | Salt-tolerant drag reducer, preparation method thereof, salt-tolerant slickwater and application thereof |
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Application publication date: 20160203 |