CN102250604A - Controlled releasing microcapsule for scale prevention, wax prevention or viscosity reduction of oil well - Google Patents
Controlled releasing microcapsule for scale prevention, wax prevention or viscosity reduction of oil well Download PDFInfo
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- CN102250604A CN102250604A CN2011101391545A CN201110139154A CN102250604A CN 102250604 A CN102250604 A CN 102250604A CN 2011101391545 A CN2011101391545 A CN 2011101391545A CN 201110139154 A CN201110139154 A CN 201110139154A CN 102250604 A CN102250604 A CN 102250604A
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Abstract
The invention relates to the technical field of petrochemical engineering, in particular to a controlled releasing microcapsule for scale prevention, wax prevention or viscosity reduction of an oil well. The invention discloses a solid controlled releasing microcapsule for scale and corrosion prevention in the production process of crude oil and wax prevention or viscosity reduction in the production process of the crude oil as well as a preparation method thereof. Filler comprising an inorganic framework and agent components is arranged in a macromolecule composite membrane. The controlled releasing microcapsule has a stable structure comprising an inside inorganic framework support and an outer-layer macromolecular composite membrane wrapping film, can be used for realizing the slow release of the agent and achieving the aim of maintaining the agent effective for a long term as well as the functions of corrosion inhibition and dispersion. With proper volume and density, the controlled releasing microcapsule can be prevented from being taken away by an extraction solution and can be added through a sleeve; and the controlled releasing microcapsule is simple in process and is strong in maneuverability. According to the controlled releasing microcapsule, volatile matters and harmful components which do harm to the human health are avoided; various components can be basically and slowly dissolved; the labor intensity of workers is reduced; and one-time agent addition can ensure stable operation for 30-90 days.
Description
Technical field
The present invention relates to the petrochemical technology field, relate in particular to a kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction.It is to be used for crude production process pipeline, the antiscale of the pump housing, protection against corrosion, and is used for solid slow-release microcapsule of crude production process pipeline wax control or viscosity reduction and preparation method thereof.
Background technology
Along with China's oilfield exploitation progressively enters the middle and later periods, crude oil water containing increases year by year, and the water of this high salinity is quite serious to the corrosion of oily inlet pipe wall and tube wall, the fouling of the oil pumping pump housing.
Scale inhibitors that uses and inhibiter mostly are liquid greatly at present, add inconvenient continuously, and preventing freeze in winter also is very big problem, and the big polymorph of solid antiscaling block is big, need the operation well workover to add, complex process need be stopped well operations, and some powdery type is not had long-term scale inhibition, corrosion inhibition along with crude oil takes away in a large number; More emerging fritter scale inhibitors, needing the High Temperature High Pressure moulding mostly is not easy efflorescence, is exactly that molten water-based can be not up to standard, does not reach the requirement of long-term antiscale, inhibition.
In the waxy crude oil recovery process, because the wax deposition of oil well, viscosity of crude is big in addition, causes the up and centrifugal current increase of oil pumper, and the oil well power consumption increases serious caused rod broken.The general way that solves is a chemical recovery, and heat is washed, and adds liquid viscosity reduction, wax control medicament, mechanical paraffin removal etc., and some well will be driven hot line for a long time could ordinary production.The consequent electricity charge and measure expense are considerable, and the Oil extraction cost is too high.The medicine machine input is bigger though liquid dosing pattern is both economical, the later maintenance trouble, and also hand labor intensity is big.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, a kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction is provided.It is simple that purpose provides a kind of technology, do not have the volatile matter and the objectionable constituent that are detrimental to health, and the slow-release microcapsule of slowly dissolved antiscale, wax control or viscosity reduction.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction, it is to be provided with the weighting material that is made of inorganic skeleton and medicament component in having the polymer compound film of surperficial mesh.
The composition of described inorganic skeleton can be made up of a kind of in zinc chloride, zinc sulfate, water glass, yellow soda ash, Sodium orthomolybdate, tripoly phosphate sodium STPP, the Sodium hexametaphosphate 99 or four kinds and mixes.
Described polymer compound film is that inorganic silicon compounds such as oxidized polyethlene wax emulsion, high-pressure polyethylene, tensio-active agents such as polyoxyethylenated alcohol sodium sulfate AES, OP-10, EVA resin, borax and pure aluminium silicate mix.
Described medicament component diameter is 5 ~ 10mm, the solid circles cylindricality particle of height≤15mm, and its density is greater than 1.0g/cm3.
Described medicament component is one or more mixtures in inhibiter, Scale inhibitors, dispersive wax-proofing agent and the viscosity-depression agent, and its formation is following three kinds by ratio of weight and the number of copies:
Dispersive wax-proofing agent: 70-100 part; Inhibiter: 0-30 part;
Described a kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction: described inhibiter be polyamines polymkeric substance, heterocyclic amine, imidazolines, 12 and the one or more combination of tetradecyl bi-quaternary ammonium salt etc. form; Described Scale inhibitors is organophosphate or poly carboxylic acid dirt dispersion agent etc.; Described dispersive wax-proofing agent comprises that OP, NP are class, sodium alkyl benzene sulfonate, fatty alcohol-ether sodium sulfate, fatty acid diethanolamine, polyoxyethylenated alcohol sodium sulfate AES, alkylol amide 6501, AE09, fluorocarbon surfactant F-1 etc.; Described viscosity-depression agent: comprise that OP, NP are class, sodium alkyl benzene sulfonate, fatty alcohol-ether sodium sulfate, fatty acid diethanolamine, polyoxyethylenated alcohol sodium sulfate AES, alkylol amide 6501, AE09, fluorocarbon surfactant F-1, vinylformic acid-maleic anhydride-styrene copolymers, maleic anhydride-vinyl acetate copolymer, vinylformic acid-maleic anhydride-vinyl acetate terpolymers; Hydroxy ethylene diphosphonic acid HEDP, hydrolytic polymaleic anhydride HPMA, bi-quaternary ammonium salt etc.
Described a kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction: described organophosphate or poly carboxylic acid dirt dispersion agent comprise organic phosphates anti-incrustation corrosion inhibitor, sequestrant, and described organic phosphates anti-incrustation corrosion inhibitor, sequestrant comprise Amino Trimethylene Phosphonic Acid ATMP, sodium ethylenediamine tetramethylenephosphonate EDTMPS, hydroxy ethylene diphosphonic acid HEDP, diethylenetriamine pentamethylene phosphonic acids DTPMP etc.Described poly carboxylic acid dirt dispersion agent comprises: hydrolytic polymaleic anhydride HPMA, phosphono-carboxylic acids copolymer p OCA.Vinylformic acid and acrylate, sulfonate, phosphonic acids, the binary of 2-acrylamido-2-methyl propane sulfonic acid AMPS, ternary, tetrapolymer etc.;
Described a kind of production technique that is used for the slow-release microcapsule of oil well antiscale, wax control or viscosity reduction is: earlier according to the above ratio with medicament 4 compositions and inorganic skeleton 4 thorough mixing, and then the forming under the pressure of 10-20MPa, oven dry is to moisture 5%-10%; Then with after the polymer wrap thin-film material high temperature ultra micro emulsification that mixes, on vibratory screening apparatus evenly spray at this work in-process particle surface, after the cooling promptly.
Described a kind of slow-release microcapsule that is used for oil well antiscale or wax control: described inorganic skeleton 3 is to be made of following raw materials by weight portion ratio: zinc chloride, water glass, tripoly phosphate sodium STPP=(1～5): (3～7): (1～3); Described polymer compound film 2 is to be made of following raw materials by weight portion ratio: oxidized polyethlene wax emulsion: EVA resin: OP-10: the mixture of pure aluminium silicate=(1～5): (1～3): (0.1～0.5): (3～6); Medicament component 4 is to be mixed by following raw materials by weight portion ratio: hydroxy ethylene diphosphonic acid HEDP: hydrolytic polymaleic anhydride HPMA: vinylformic acid-maleic anhydride-vinyl acetate terpolymers: tetrahydroglyoxaline=(1～6): (1～6): (1～6): (0.5～2).
Described a kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction: described inorganic skeleton propping agent is to be made of following raw materials by weight portion ratio: zinc sulfate: water glass: yellow soda ash=(1～6): (2～5): (1～6); Described polymer compound film is to be made of following raw materials by weight portion ratio: oxidized polyethlene wax emulsion: low pressure polyethylene: AES and pure aluminium silicate: the mixture of borax=(1～5): (0.2～2): (0.1～0.5): (1～4.5): (0.5～2); Described medicament component is to be made of following raw materials by weight portion ratio: sodium alkyl benzene sulfonate: AES: fluorocarbon surfactant F-1: vinylformic acid-maleic anhydride-vinyl acetate terpolymers=(1～6): (1～2): (0.01～0.1): (1～6).
Described a kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction: described inorganic skeleton propping agent is to be made of following raw materials by weight portion ratio: zinc sulfate: water glass: yellow soda ash=(1～2): (1～3): (1～5); Described polymer compound film is to be made of than mixing following raw materials by weight portion: oxidized polyethlene wax emulsion: low pressure polyethylene: polyoxyethylenated alcohol sodium sulfate AES and pure aluminium silicate: the mixture of borax=(1～2): (0.5～1.5): (0.1～0.5): (1～4): (0.5～2); Described medicament component is by being to be made of following raw materials by weight portion ratio: sodium alkyl benzene sulfonate: polyoxyethylenated alcohol sodium sulfate AES: fluorocarbon surfactant F-1: vinylformic acid-maleic anhydride-vinyl acetate terpolymers=(1～6): (0.5～1.5): (0.01～0.1): (0.5～2.5).
Described a kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction: it is to be made of following raw materials by weight portion ratio that described inorganic skeleton 3 supports: agent sulphur zinc: water glass: yellow soda ash: Sodium hexametaphosphate 99=(1～3): (1～4): (1～3): (1～4); Described polymer compound film 2 is to be made of than mixing following raw materials by weight portion: oxidized polyethlene wax emulsion: high-pressure polyethylene: EVA resin: polyoxyethylenated alcohol sodium sulfate AES: pure aluminium silicate: borax=(0.5～2): (0.5～2): (1～3): (0.2～1): (1～4): (1～4); Described medicament component 4 is to be made of following raw materials by weight portion ratio: sodium alkyl benzene sulfonate: fluorocarbon surfactant F-1: hydroxy ethylene diphosphonic acid HEDP: hydrolytic polymaleic anhydride HPMA: vinylformic acid-maleic anhydride-vinyl acetate terpolymers: bi-quaternary ammonium salt=(1～4): (0.01～0.1): (0.5～3): (1～4): (1～4): (0.3～1.5).
The invention has the beneficial effects as follows:
Slow-release microcapsule of the present invention adopts inner inorganic skeleton to support and the common rock steady structure that constitutes of outer polymer compound film wrap membrane structure, can realize that medicament slowly discharges, and has reached the permanently effective purpose of medicament.
The present invention adopts normal temperature with medicament component and inorganic skeleton thorough mixing, and the high pressure compacting forms diameter 5 ~ 10mm, the solid circles cylindricality particle of height≤15mm then.Control this particle water ratio between 5%-10%, be beneficial to keep granule strength, then to this work in-process particle mixture with oxidized polyethlene wax emulsion, EVA resin, tensio-active agent and inorganic silicon compound on vibratory screening apparatus, determine its ratio according to oil quality characteristic, evenly spray after the ultra micro emulsification, obtain finished product slow-release microcapsule of the present invention after the cooling at this work in-process particle surface.
This slow-release microcapsule can be added by oil well casing because volume is little, because the adding of inorganic components makes density＞1.0g/cm3, so can sink to the shaft bottom fully; Slow-release microcapsule inside is supported with inorganic skeleton, both can reach to keep the capsule configuration, does not hinder the release of medicine component again, and can play corrosion inhibition.Simultaneously can increase density, be beneficial to medicament and arrive the shaft bottom smoothly; Because outer compound polymer wrap, observing this integument under Electronic Speculum is reticulated structure in addition, and nearly 1000 orders of mesh can make water molecules and medicine component freely pass through between 2000 orders fully, and medicine component is released.Simultaneously, again can sustained release speed, prevent that inner skeleton is too fast loose.
The inorganic skeleton propping agent of inside of the present invention can use and can satisfy intensity that the present invention requires, can play most of inorganic materials of inhibition, dissemination again.Outside overlay film is not got rid of use and can be satisfied other macromolecular materials of the perviousness of requirement of the present invention, aperture and dissolution rate as outer composite high-molecular mould material.
Modern design of the present invention just is that suitable volume, density both can prevent that slow-release microcapsule from being taken away by extraction liquid, can add from sleeve pipe at any time again, and technology is simple, and is workable.Do not have the volatile matter and the objectionable constituent that are detrimental to health, each component can both slowly be dissolved substantially.Simultaneously, be added with support frame, and at skin parcel one deck polymer laminated film, continuing for a long time to play a role and played vital role to medicament in slow-release microcapsule inside.Reduced working strength of workers, a dosing guarantees steadily to move in 30-90 days at least.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: surperficial mesh 1, polymer compound film 2, inorganic skeleton 3, medicament component 4.
Below in conjunction with specific embodiments of the invention and accompanying drawing, the present invention is described in detail.
Embodiment
Embodiment 1:
As shown in Figure 1, Fig. 1 is a structural representation of the present invention.The present invention is a kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction.
This slow-release microcapsule inside is supported with inorganic skeleton 3, and the density that makes medicament component 4 is greater than 1.0g/cm3.Both can reach maintenance capsule configuration, not hinder the release of medicine component again.These inorganic skeleton 3 propping agents can use the intensity that can satisfy requirement of the present invention, can play most of inorganic materials of wax control, dispersion, corrosion inhibition.The inorganic skeleton composition can be made up of zinc chloride, water glass, yellow soda ash, Sodium orthomolybdate, tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 etc.
Volume of the present invention and shape are to be diameter 5 ~ 10mm, the solid circles cylindricality particle of height≤15mm, and the adding of inorganic skeleton 3 can keep shape, makes medicament density greater than 1.0g/cm3.Can reach the permanently effective purpose of the stable performance of medicament, can not interruptedly directly send to the shaft bottom with waterpower again from oil well casing.
The mixture of the outer field compound polymer compound film 2 wrap film selective oxidation polythene wax emulsions of the present invention, EVA resin, tensio-active agent and inorganic silicon compound both can form the reticulated structure surface.The adding of tensio-active agent can prevent that crude oil from the adhering to of its surface, influencing separating out of medicine component.Another effect of inorganic silicon raw material is to play the adjusting control agent effect, and its adding is in order to dissolve later stage controlled oxidation polythene wax emulsion, the time of EVA resin dispersion in oil at slow-release microcapsule.Outside overlay film polymer compound film 2 is not got rid of use and can be satisfied other macromolecular materials of the perviousness of requirement of the present invention, aperture and dissolution rate as outer composite high-molecular mould material.
The medicament component 4 of this slow-release microcapsule can be one or more of inhibiter, Scale inhibitors, dispersive wax-proofing agent, viscosity-depression agent, combination in proportion.The following is massfraction:
Viscosity-depression agent: 70-100 part; Inhibiter: 0-30 part.
Above-mentioned medicament component 4 inhibiter, Scale inhibitors, dispersive wax-proofing agent, viscosity-depression agent etc. are mixture.According to well water, crude oil property, extraction liquid dirt type, factors such as downhole temperature, down-hole pressure are determined concrete prescription.
Being constructed as follows of medicament component 4 of the present invention:
Inhibiter: can by polyamines polymkeric substance, heterocyclic amine, imidazolines, 12 and one or more of tetradecyl bi-quaternary ammonium salt form;
Scale inhibitors: select organophosphate, the poly carboxylic acid dirt dispersion agent.Comprise most of organic phosphates anti-incrustation corrosion inhibitors, sequestrant, as: Amino Trimethylene Phosphonic Acid ATMP, sodium ethylenediamine tetramethylenephosphonate EDTMPS, hydroxy ethylene diphosphonic acid HEDP, diethylenetriamine pentamethylene phosphonic acids DTPMP etc.And polycarboxylic acid, as: hydrolytic polymaleic anhydride HPMA, phosphono-carboxylic acids copolymer p OCA.Vinylformic acid and acrylate, sulfonate, phosphonic acids, binary, ternary, the tetrapolymer of 2-acrylamido-2-methyl propane sulfonic acid AMPS;
Dispersive wax-proofing agent: comprise that OP, NP are class, sodium alkyl benzene sulfonate, fatty alcohol-ether sodium sulfate, fatty acid diethanolamine, AES, alkylol amide 6501, AE09, fluorocarbon surfactant F-1 etc.;
Viscosity-depression agent: comprise that OP, NP are class, sodium alkyl benzene sulfonate, fatty alcohol-ether sodium sulfate, fatty acid diethanolamine, AES, alkylol amide 6501, AE09, fluorocarbon surfactant F-1, vinylformic acid-maleic anhydride-styrene copolymers, maleic anhydride-vinyl acetate copolymer etc.
Production technique of the present invention is as follows:
According to block oil well produced liquid situation, determine the slow-release microcapsule purposes, be to be used for oil well antiscale, oil well paraffin prevention, still not only antiscale but also wax control.To determine reagent combination, again according to corresponding inorganic skeleton of formulation selection and polymer wrap thin-film material.
Elder generation is with medicament component 4 and inorganic skeleton 3 thorough mixing, and then the forming under the pressure of 10-20MPa, and oven dry is to moisture below 10%.With after the polymer wrap thin-film material high temperature ultra micro emulsification that mixes, evenly spray obtains the finished product slow-release microcapsule at this work in-process particle surface after the cooling on vibratory screening apparatus then.
Following example is intended to further describe the present invention, only represents the present invention's a example, does not comprise the right of whole requirements of the present invention.Put before the principle that does not change claim of the present invention, anyone will fall within the claim scope of the present invention in change or change by any way.
A kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction is to be provided with the intersection mixed structure weighting material that is made of inorganic skeleton 3 and medicament component 4 in the polymer compound film 2 that has surperficial mesh 1.
Volume of the present invention and shape are to be diameter 5mm, the solid circles cylindricality particle of high 15mm, and the adding of inorganic skeleton 3 can keep shape, and the density that makes medicament component 4 is 1.3g/cm3.
A kind of slow-release microcapsule that is used for the slow-release microcapsule of oil well antiscale, wax control or viscosity reduction as the corrosion-mitigation scale-inhibition purposes.
Described inorganic skeleton 3 is that the inorganic skeleton propping agent is to be made of following raw materials by weight portion ratio: zinc chloride: water glass: tripoly phosphate sodium STPP=4:4:2;
The outer compound polymer compound film 2 of described slow-release microcapsule is that the mixture by oxidized polyethlene wax emulsion, EVA resin, OP-10 and pure aluminium silicate constitutes, and its ratio of weight and number is: the oxidized polyethlene wax emulsion: EVA resin: OP-10: the mixture=2.5:2:0.5:5 of pure aluminium silicate;
Described medicament component 4 is to be mixed by following raw materials by weight portion ratio: hydroxy ethylene diphosphonic acid HEDP: hydrolytic polymaleic anhydride HPMA: vinylformic acid-maleic anhydride-vinyl acetate terpolymers: tetrahydroglyoxaline=3:3:3:1.
A kind of production technique that is used for the slow-release microcapsule of oil well antiscale, wax control or viscosity reduction is:
Get earlier 4 kilograms of zinc chloride, 4 kilograms of water glass, tripoly phosphate sodium STPP according to the above ratio and be hybridly prepared into inorganic skeleton 3 for 2 kilograms;
Get according to the above ratio: 2.5 kilograms of oxidized polyethlene wax emulsions, 2 kilograms of EVA resins, 0.5 kilogram of OP-10 and pure aluminium silicate mix the outer compound polymer compound film 2 of slow-release microcapsule for 5 kilograms again;
Get according to the above ratio at last: 3 kilograms of hydroxy ethylene diphosphonic acid HEDP, 3 kilograms of hydrolytic polymaleic anhydride HPMA, 3 kilograms of vinylformic acid-maleic anhydrides-vinyl acetate terpolymers, 1 kilogram of mixed preparing of tetrahydroglyoxaline forms medicament component 4.
With medicament component 4 and inorganic skeleton 4 thorough mixing that prepare, then at the forming under the pressure of 10MPa, dry to water ratio between 5%-10%; After the polymer wrap thin-film material that mixes was polymer compound film 2 high temperature ultra micro emulsifications, evenly spray got product after the cooling at this work in-process particle surface on vibratory screening apparatus.
A kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction is to be provided with the intersection mixed structure weighting material that is made of inorganic skeleton 3 and medicament component 4 in the polymer compound film 2 that has surperficial mesh 1.
Volume of the present invention and shape are to be diameter 7mm, the solid circles cylindricality particle of high 13mm, and the adding of inorganic skeleton 3 can keep shape, and the density that makes medicament component 4 is 1.3g/cm3.
A kind of slow-release microcapsule that is used for the slow-release microcapsule of oil well antiscale, wax control or viscosity reduction as the oil well paraffin prevention purposes.
These slowly-releasing wax control microcapsule inorganic skeleton 3 propping agents are to be made of following raw materials by weight portion ratio: zinc sulfate: water glass: yellow soda ash=2:3:5;
The outer compound polymer of slow-release microcapsule wrap film is that polymer compound film 2 is to be made of following raw materials by weight portion ratio: oxidized polyethlene wax emulsion: low pressure polyethylene: polyoxyethylenated alcohol sodium sulfate AES and pure aluminium silicate: the mixture=2:1.5:0.5:4:2 of borax;
The medicament component 4 of slow-release microcapsule is to be made of following raw materials by weight portion ratio: sodium alkyl benzene sulfonate: polyoxyethylenated alcohol sodium sulfate AES: fluorocarbon surfactant F-1: vinylformic acid-maleic anhydride-vinyl acetate terpolymers=6:1.5:0.01:2.5;
Its preparation method is with embodiment 1.
A kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction is to be provided with the intersection mixed structure weighting material that is made of inorganic skeleton 3 and medicament component 4 in the polymer compound film 2 that has surperficial mesh 1.
Volume of the present invention and shape are to be diameter 8mm, the solid circles cylindricality particle of high 12mm, and the adding of inorganic skeleton 3 can keep shape, and the density that makes medicament component 4 is 1.4g/cm3.
A kind of slow-release microcapsule that is used for the slow-release microcapsule of oil well antiscale, wax control or viscosity reduction as oil well paraffin prevention, antiscale purposes.
This slowly-releasing wax control, antiscale microcapsule inorganic skeleton 3 propping agents are to be made of following raw materials by weight portion ratio: zinc sulfate: water glass: yellow soda ash=2:3:5;
The outer compound polymer of slow-release microcapsule wrap film is that polymer compound film 2 is to be made of than mixing following raw materials by weight portion: oxidized polyethlene wax emulsion: low pressure polyethylene: polyoxyethylenated alcohol sodium sulfate AES and pure aluminium silicate: the mixture=2:1.5:0.5:4:2 of borax;
The medicament component 4 of slow-release microcapsule is by being to be made of following raw materials by weight portion ratio: sodium alkyl benzene sulfonate: polyoxyethylenated alcohol sodium sulfate AES: fluorocarbon surfactant F-1: vinylformic acid-maleic anhydride-vinyl acetate terpolymers=6:1.5:0.01:2.5.
Its preparation method is with embodiment 1.
Embodiment 4
A kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction is to be provided with the intersection mixed structure weighting material that is made of inorganic skeleton 3 and medicament component 4 in the polymer compound film 2 that has surperficial mesh 1.
Volume of the present invention and shape are to be diameter 9mm, the solid circles cylindricality particle of high 10mm, and the adding of inorganic skeleton 3 can keep shape, and the density that makes the medicament component is greater than 1.3g/cm3.
A kind of slow-release microcapsule of oil well antiscale, wax control or viscosity reduction that is used for is as oil well viscosity reduction, the dual purpose slow-release microcapsule of antiscale.
This slowly-releasing wax control, 3 supports of antiscale microcapsule inorganic skeleton are to be made of following raw materials by weight portion ratio: agent sulphur zinc: water glass: yellow soda ash: Sodium hexametaphosphate 99=2:3:2:3;
The outer compound polymer of slow-release microcapsule wrap film is that polymer compound film 2 is to be made of than mixing following raw materials by weight portion: oxidized polyethlene wax emulsion: high-pressure polyethylene: EVA resin: polyoxyethylenated alcohol sodium sulfate AES: pure aluminium silicate: borax=1:1.5:2:0.5:3:2;
The medicament component 4 of slow-release microcapsule is to be made of following raw materials by weight portion ratio: sodium alkyl benzene sulfonate: fluorocarbon surfactant F-1: hydroxy ethylene diphosphonic acid HEDP: hydrolytic polymaleic anhydride HPMA: vinylformic acid-maleic anhydride-vinyl acetate terpolymers: bi-quaternary ammonium salt=3:0.01:2:2:2:1.
Its preparation method is with embodiment 1.
Embodiment 5
Volume of the present invention and shape can also be diameter 10mm, high 9mm or height are the solid circles cylindricality particle of any one numerical value among 8mm, 7mm, 6mm, 5mm, 4mm, 3mm, 2mm, the 1mm, the adding of inorganic skeleton 3 can keep shape, and the density that makes medicament component 4 is that any one numerical value among 1.5g/cm3 or 1.6g/cm3 or 1.7g/cm3 or 1.8g/cm3 or 1.9g/cm3 or 2g/cm3 or 2.5g/cm3 or 3g/cm3 or the 4g/cm3 all can.
Claims (11)
1. slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction is characterized in that: it is to be provided with the weighting material that is made of inorganic skeleton (3) and medicament component (4) in the polymer compound film that has surperficial mesh (1) (2).
2. a kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction according to claim 1 is characterized in that: the composition of described inorganic skeleton (3) can be made up of a kind of in zinc chloride, zinc sulfate, water glass, yellow soda ash, Sodium orthomolybdate, tripoly phosphate sodium STPP, the Sodium hexametaphosphate 99 or four kinds and mixes.
3. a kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction according to claim 1 is characterized in that: described polymer compound film (2) is that inorganic silicon compounds such as oxidized polyethlene wax emulsion, high-pressure polyethylene, tensio-active agents such as polyoxyethylenated alcohol sodium sulfate AES, OP-10, EVA resin, borax and pure aluminium silicate mix.
4. a kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction according to claim 1 is characterized in that: described medicament component (4) diameter is 5 ~ 10mm, the solid circles cylindricality particle of height≤15mm, and its density is greater than 1.0g/cm3;
Described medicament component (4) is one or more mixtures in inhibiter, Scale inhibitors, dispersive wax-proofing agent and the viscosity-depression agent, and its formation is following three kinds by ratio of weight and the number of copies:
5. a kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction according to claim 4 is characterized in that:
Described inhibiter be polyamines polymkeric substance, heterocyclic amine, imidazolines, 12 and tetradecyl bi-quaternary ammonium salt etc. in one or more combination form;
Described Scale inhibitors is organophosphate or poly carboxylic acid dirt dispersion agent etc.;
Described dispersive wax-proofing agent comprises that OP, NP are class, sodium alkyl benzene sulfonate, fatty alcohol-ether sodium sulfate, fatty acid diethanolamine, polyoxyethylenated alcohol sodium sulfate AES, alkylol amide 6501, AE09, fluorocarbon surfactant F-1 etc.;
Described viscosity-depression agent: comprise that OP, NP are class, sodium alkyl benzene sulfonate, fatty alcohol-ether sodium sulfate, fatty acid diethanolamine, polyoxyethylenated alcohol sodium sulfate AES, alkylol amide 6501, AE09, fluorocarbon surfactant F-1, vinylformic acid-maleic anhydride-styrene copolymers, maleic anhydride-vinyl acetate copolymer, vinylformic acid-maleic anhydride-vinyl acetate terpolymers; Hydroxy ethylene diphosphonic acid HEDP, hydrolytic polymaleic anhydride HPMA, bi-quaternary ammonium salt etc.
6. a kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction according to claim 5 is characterized in that:
Described organophosphate or poly carboxylic acid dirt dispersion agent comprise organic phosphates anti-incrustation corrosion inhibitor, sequestrant, and described organic phosphates anti-incrustation corrosion inhibitor, sequestrant comprise Amino Trimethylene Phosphonic Acid ATMP, sodium ethylenediamine tetramethylenephosphonate EDTMPS, hydroxy ethylene diphosphonic acid HEDP, diethylenetriamine pentamethylene phosphonic acids DTPMP etc.;
Described poly carboxylic acid dirt dispersion agent comprises: hydrolytic polymaleic anhydride HPMA, phosphono-carboxylic acids copolymer p OCA, vinylformic acid and acrylate, sulfonate, phosphonic acids, the binary of 2-acrylamido-2-methyl propane sulfonic acid AMPS, ternary, tetrapolymer etc.
7. according to the described a kind of production technique that is used for the slow-release microcapsule of oil well antiscale, wax control or viscosity reduction of claim 1 to 6 be: earlier according to the above ratio with medicament (4) composition and inorganic skeleton (3) thorough mixing, and then the forming under the pressure of 10-20MPa, oven dry is to moisture 5%-10%; Then with after the polymer wrap thin-film material high temperature ultra micro emulsification that mixes, on vibratory screening apparatus evenly spray at this work in-process particle surface, after the cooling promptly.
8. a kind of slow-release microcapsule that is used for oil well antiscale or wax control according to claim 1 is characterized in that:
Described inorganic skeleton (3) is to be made of following raw materials by weight portion ratio: zinc chloride, water glass, tripoly phosphate sodium STPP=(1～5): (3～7): (1～3);
Described polymer compound film (2) is to be made of following raw materials by weight portion ratio: oxidized polyethlene wax emulsion: EVA resin: OP-10: the mixture of pure aluminium silicate=(1～5): (1～3): (0.1～0.5): (3～6);
Medicament component (4) is to be mixed by following raw materials by weight portion ratio: hydroxy ethylene diphosphonic acid HEDP: hydrolytic polymaleic anhydride HPMA: vinylformic acid-maleic anhydride-vinyl acetate terpolymers: tetrahydroglyoxaline=(1～6): (1～6): (1～6): (0.5～2).
9. a kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction according to claim 1 is characterized in that:
Described inorganic skeleton (3) propping agent is to be made of following raw materials by weight portion ratio: zinc sulfate: water glass: yellow soda ash=(1～6): (2～5): (1～6);
Described polymer compound film (2) is to be made of following raw materials by weight portion ratio: oxidized polyethlene wax emulsion: low pressure polyethylene: AES and pure aluminium silicate: the mixture of borax=(1～5): (0.2～2): (0.1～0.5): (1～4.5): (0.5～2);
Described medicament component (4) is to be made of following raw materials by weight portion ratio: sodium alkyl benzene sulfonate: AES: fluorocarbon surfactant F-1: vinylformic acid-maleic anhydride-vinyl acetate terpolymers=(1～6): (1～2): (0.01～0.1): (1～6).
10. a kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction according to claim 1 is characterized in that:
Described inorganic skeleton (3) propping agent is to be made of following raw materials by weight portion ratio: zinc sulfate: water glass: yellow soda ash=(1～2): (1～3): (1～5);
Described polymer compound film (2) is to be made of than mixing following raw materials by weight portion: oxidized polyethlene wax emulsion: low pressure polyethylene: polyoxyethylenated alcohol sodium sulfate AES and pure aluminium silicate: the mixture of borax=(1～2): (0.5～1.5): (0.1～0.5): (1～4): (0.5～2);
Described medicament component (4) is by being to be made of following raw materials by weight portion ratio: sodium alkyl benzene sulfonate: polyoxyethylenated alcohol sodium sulfate AES: fluorocarbon surfactant F-1: vinylformic acid-maleic anhydride-vinyl acetate terpolymers=(1～6): (0.5～1.5): (0.01～0.1): (0.5～2.5).
11. a kind of slow-release microcapsule that is used for oil well antiscale, wax control or viscosity reduction according to claim 1 is characterized in that:
It is to be made of following raw materials by weight portion ratio that described inorganic skeleton (3) supports: agent sulphur zinc: water glass: yellow soda ash: Sodium hexametaphosphate 99=(1～3): (1～4): (1～3): (1～4);
Described polymer compound film (2) is to be made of than mixing following raw materials by weight portion: oxidized polyethlene wax emulsion: high-pressure polyethylene: EVA resin: polyoxyethylenated alcohol sodium sulfate AES: pure aluminium silicate: borax=(0.5～2): (0.5～2): (1～3): (0.2～1): (1～4): (1～4);
Described medicament component (4) is to be made of following raw materials by weight portion ratio: sodium alkyl benzene sulfonate: fluorocarbon surfactant F-1: hydroxy ethylene diphosphonic acid HEDP: hydrolytic polymaleic anhydride HPMA: vinylformic acid-maleic anhydride-vinyl acetate terpolymers: bi-quaternary ammonium salt=(1～4): (0.01～0.1): (0.5～3): (1～4): (1～4): (0.3～1.5).
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| CN2011101391545A CN102250604A (en) | 2011-05-27 | 2011-05-27 | Controlled releasing microcapsule for scale prevention, wax prevention or viscosity reduction of oil well |
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| CN2011101391545A CN102250604A (en) | 2011-05-27 | 2011-05-27 | Controlled releasing microcapsule for scale prevention, wax prevention or viscosity reduction of oil well |
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Application publication date: 20111123 |