CN104231132A - Multifunctional oil-displacing polymer and preparation method thereof - Google Patents
Multifunctional oil-displacing polymer and preparation method thereof Download PDFInfo
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- 229920000642 polymer Polymers 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 22
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims abstract description 10
- IKZUTTBMFIUNNV-UHFFFAOYSA-N formaldehyde N-methylmethanamine Chemical compound C=O.CNC IKZUTTBMFIUNNV-UHFFFAOYSA-N 0.000 claims abstract description 10
- JZMJDSHXVKJFKW-UHFFFAOYSA-M methyl sulfate(1-) Chemical compound COS([O-])(=O)=O JZMJDSHXVKJFKW-UHFFFAOYSA-M 0.000 claims abstract description 10
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims abstract description 10
- 239000008098 formaldehyde solution Substances 0.000 claims abstract description 6
- 239000000243 solution Substances 0.000 claims description 27
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 14
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims description 11
- 239000012670 alkaline solution Substances 0.000 claims description 10
- 230000035484 reaction time Effects 0.000 claims description 10
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- 238000006392 deoxygenation reaction Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 2
- 230000001804 emulsifying effect Effects 0.000 abstract description 8
- 239000003513 alkali Substances 0.000 abstract description 7
- 239000010779 crude oil Substances 0.000 abstract description 7
- 238000011084 recovery Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 17
- 239000011435 rock Substances 0.000 description 12
- 238000006073 displacement reaction Methods 0.000 description 7
- 239000002585 base Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000008719 thickening Effects 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 3
- 239000013543 active substance Substances 0.000 description 3
- 150000001408 amides Chemical class 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000011206 ternary composite Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000006683 Mannich reaction Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000012488 sample solution Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to a multifunctional oil-displacing polymer and a preparation method thereof; adding 300 parts of water and 20 parts of polyacrylamide; then adding a formaldehyde-dimethylamine solution prepared by mixing 16 parts of formaldehyde and 20 parts of dimethylamine into a reaction kettle in a vacuumizing and deoxidizing state, controlling the reaction temperature to be 25-35 ℃, and reacting for 100-120 minutes at constant temperature; then adding 10 parts of formaldehyde solution and 18 parts of sodium bisulfite, adjusting the pH value to 11.0-13.0 by using alkali solution, and quickly heating to 65-85 ℃ for constant-temperature reaction for 80-90 minutes; cooling to normal temperature, adding 16 parts of methyl sulfate, and reacting for 40-60 minutes to obtain the polymer; the oil-displacing polymer prepared by the method has strong tackifying and emulsifying capabilities and higher crude oil recovery capability.
Description
Technical field
The present invention relates to a kind of flooding polymers, be a kind of on polyacrylamide molecular skeleton specifically, introduce multi-functional flooding polymers of one of sulphur methyl, carboxyl and quaternary ammonium salt functional structure unit and preparation method thereof successively.
Background technology
At present, the method for tertiary oil recovery that oil field is commonly used mainly contains polymer flooding, ternary composite driving, binary combination flooding etc.The polymkeric substance mainly partially hydrolyzed polyacrylamide that polymer displacement of reservoir oil tech adopts, it injects the viscosity of fluid by increasing, reduce the mobility ratio of water oil, reduces the fingering of water, expand sweep efficiency, polymkeric substance has visco-elasticity simultaneously, can improve oil displacement efficiency, thus improves the recovery ratio of oil reservoir, but the interfacial tension between polymkeric substance and crude oil is very high, do not have solubilising and emulsifying capacity to crude oil, thus the degree of this technology raising oil recovery factor is restricted, and generally only has 10%-15%.Poly-/table/alkali ternary composite driving is while maintenance injected fluid viscosity, and realize reaching ultra low interfacial tension between profit, oil recovery factor can improve more than 20% on the basis of water drive.But due to adding of highly basic in ternary system, the dispersion of stratum clay, transfer can be caused, zone permeability is caused to decline, alkali and reservoir fluid and rock forming mineral react, alkali dirt can be formed, formation damages, and can cause the fouling of oil well, ground Produced Liquid process instrumentation and pipeline etc., have a strong impact on normal production.Poly-/table binary combination flooding has given full play to the synergy of polymkeric substance and tensio-active agent to improve the method for recovery ratio, play the visco-elasticity of polymkeric substance to greatest extent, reduce oil water interfacial tension, decrease the negative impact that emulsion process brings, weaken because in ternary, the existence of alkali causes the scale formation of stratum and well.The production cost that multiple elements design drives chemical agent is all higher, in addition because the absorption of mixture in reservoir of porous medium of different chemical agent, the performance characteristic such as diffusion and migration differ greatly, when also can cause the displacement of reservoir oil in reservoir pore " chromatogram effect ".Based on above reason, we need a kind of comprehensive polymkeric substance and the advantage both tensio-active agent, without under the condition of alkali, thickening, reduce mobility ratio, expand sweep efficiency, improve the advantages such as the solubilising of crude oil and emulsifying capacity are gathered, realize high-level efficiency unitary chemical displacement of reservoir oil product that is more economical, environmental protection.
Summary of the invention
The object of the invention is for overcoming problems of the prior art, a kind of multi-functional flooding polymers and preparation method thereof is provided, this kind of multi-functional flooding polymers, combine the advantage of both polymkeric substance and tensio-active agent, without under the condition of alkali, thickening, reduce mobility ratio, expand sweep efficiency, improve to superior set such as the solubilising of crude oil and emulsifying capacities.
The technical scheme adopted for realizing the object of the invention is: design a kind of multi-functional flooding polymers, it is characterized in that: it take polyacrylamide as initial feed, contained the Polymer Used For Oil Displacement of sulphur methyl, carboxyl and quaternary ammonium salt functional structure unit by amine-methylated, sulfomethylation, partial amides base hydrolysis.
Described Polymer Used For Oil Displacement is made up of by following weight proportion following raw material:
Polyacrylamide is 20 parts, water is 320 parts, formaldehyde is 26 parts, dimethylamine is 20 parts, sodium bisulfite is 18 parts, alkali metal hydroxide is 5 parts, methyl sulfate is 16 parts.
The preparation method of described a kind of multi-functional flooding polymers is:
1) get that polyacrylamide is 20 parts, water is 320 parts, formaldehyde is 26 parts, dimethylamine is 20 parts, sodium bisulfite is 18 parts, alkali metal hydroxide is 5 parts, methyl sulfate is 16 parts, for subsequent use;
2) first start the stirring arm of reactor, add the polyacrylamide solution that concentration is 6%, wherein said concentration is that in the polyacrylamide solution of 6%, water is 300 parts, polyacrylamide is 20 parts; Then mixing in advance under the state vacuumizing deoxygenation and reacting the formaldehyde-dimethylamine solution generated joins in reactor, wherein said formaldehyde-dimethylamine solution is by 16 parts of formaldehyde and 20 parts of dimethylamine mixed preparing, controlling temperature of reaction is 25 ~ 35 DEG C, 100 ~ 120 minutes isothermal reaction time; After the first step reaction terminates, drop into the formaldehyde solution of 10 parts and the sodium bisulfite of 18 parts, with alkaline solution adjust ph to 11.0 ~ 13.0 that concentration is 20%, second step reaction is carried out in even rapid temperature increases to 65 ~ 85 DEG C, wherein said concentration is alkali metal hydroxide 5 parts in the alkaline solution of 20%, 20 parts, water; 80 ~ 90 minutes isothermal reaction time, be then cooled to normal temperature, the methyl sulfate adding 16 parts reacts 40 ~ 60 minutes, the final polymkeric substance obtaining this product.
Described alkali metal hydroxide is the wherein one in sodium hydroxide, potassium hydroxide, calcium hydroxide, hydrated barta.
The invention has the beneficial effects as follows: add in proportion at twice due to the formaldehyde in flooding polymers of the present invention instead of once excessively to add, be conducive to the conservative control of the stable of the first step Mannich reaction product and second step sulfomethylation, partial amides base hydrolysis degree.Flooding polymers of the present invention has very strong thickening, emulsifying capacity and higher oil recovering ability.
Embodiment
Embodiment 1
1) get that polyacrylamide is 20Kg, water is 320Kg, formaldehyde is 26Kg, dimethylamine is 20Kg, sodium bisulfite is 18Kg, alkali metal hydroxide is 5Kg, methyl sulfate is 16Kg, for subsequent use; Described alkali metal hydroxide is sodium hydroxide.
2) first start the stirring arm of reactor, add the polyacrylamide solution that concentration is 6%, wherein said concentration is that in the polyacrylamide solution of 6%, water is 300Kg, polyacrylamide is 20Kg; Then mixing in advance under the state vacuumizing deoxygenation and reacting the formaldehyde-dimethylamine solution generated joins in reactor, wherein said formaldehyde-dimethylamine solution is by 16Kg formaldehyde and 20Kg dimethylamine mixed preparing, controlling temperature of reaction is 35 DEG C, 100 minutes isothermal reaction time; After the first step reaction terminates, drop into the formaldehyde solution of 10Kg part and the sodium bisulfite of 18Kg, regulate pH value to 13.0 with the alkaline solution that concentration is 20%, even rapid temperature increases to 70 DEG C carries out second step reaction, wherein said concentration is sodium hydroxide 5Kg in the alkaline solution of 20%, water 20Kg; 90 minutes isothermal reaction time, be then cooled to normal temperature, the methyl sulfate adding 16Kg reacts 40 minutes, the final polymkeric substance obtaining this product.
Embodiment 2
First start the stirring arm of reactor, add the polyacrylamide solution that concentration is 6%, wherein said concentration is that in the polyacrylamide solution of 6%, water is 300Kg, polyacrylamide is 20Kg; Then mixing in advance under the state vacuumizing deoxygenation and reacting the formaldehyde-dimethylamine solution generated joins in reactor, wherein said formaldehyde-dimethylamine solution is by 16Kg formaldehyde and 20Kg dimethylamine mixed preparing, controlling temperature of reaction is 25 DEG C, 110 minutes isothermal reaction time; After the first step reaction terminates, drop into the formaldehyde solution of 10Kg part and the sodium bisulfite of 18Kg, regulate pH value to 12.0 with the alkaline solution that concentration is 20%, even rapid temperature increases to 85 DEG C carries out second step reaction, wherein said concentration is potassium hydroxide 5Kg in the alkaline solution of 20%, water 20Kg; 85 minutes isothermal reaction time, be then cooled to normal temperature, the methyl sulfate adding 16Kg reacts 50 minutes, the final polymkeric substance obtaining this product.
Embodiment 3
First start the stirring arm of reactor, add the polyacrylamide solution that concentration is 6%, wherein said concentration is that in the polyacrylamide solution of 6%, water is 300Kg, polyacrylamide is 20Kg; Then mixing in advance under the state vacuumizing deoxygenation and reacting the formaldehyde-dimethylamine solution generated joins in reactor, wherein said formaldehyde-dimethylamine solution is by 16Kg formaldehyde and 20Kg dimethylamine mixed preparing, controlling temperature of reaction is 30 DEG C, 120 minutes isothermal reaction time; After the first step reaction terminates, drop into the formaldehyde solution of 10Kg part and the sodium bisulfite of 18Kg, regulate pH value to 11.0 with the alkaline solution that concentration is 20%, even rapid temperature increases to 65 DEG C carries out second step reaction, wherein said concentration is sodium hydroxide 5Kg in the alkaline solution of 20%, water 20Kg; 80 minutes isothermal reaction time, be then cooled to normal temperature, the methyl sulfate adding 16Kg reacts 60 minutes, the final polymkeric substance obtaining this product.
Embodiment 4
Embodiment 4 is substantially identical with embodiment 1, and difference is: described alkali metal hydroxide is calcium hydroxide.
Embodiment 5
Embodiment 5 is substantially identical with embodiment 1, and difference is: described alkali metal hydroxide is hydrated barta.
Flooding polymers of the present invention is not limited only to the preparation method in above-described embodiment, as long as its preparation method take polyacrylamide as initial feed, contained the Polymer Used For Oil Displacement of sulphur methyl, carboxyl and quaternary ammonium salt functional structure unit by amine-methylated, sulfomethylation, partial amides base hydrolysis.
Assay
Experimental program 1: the tackifying of multi-functional flooding polymers
The multi-functional flooding polymers that Example 1 is obtained, configures the multi-functional flooding polymers of 500mg/L and common M6000 polymers soln respectively with clear water and sewage.Pipette 2 ц L sample solutions on carrier with microsyringe, move to rapidly precooling 30s on liquid nitrogen, then container is immersed liquid nitrogen freezing 2-3min, be transferred to rapidly-30 DEG C of vacuum freeze driers, freezingly vacuumize dry 48h, take out metal spraying plated film.Sample is moved into SEM scanning electronic microscope, carry out the pattern observing multi-functional flooding polymers and common M6000 polymer water molecular coil, choose picture, analyze.
Experimental result and analysis 1:
Common M6000 polymer molecule defines the reticulated structure of local, individual layer in clear water solution, and mesh is comparatively large, and comparatively sparse, and grid frame is thicker.In sewage solution, the uneven reticulated structure formed by Van der Waals cross-linking set, is not well bound up between mesh, and occur a lot of breakpoint, defect appears in grid, and skeleton is sparse, can adsorb and wrap up water molecules quantity and significantly reduce, and tackifying ability is deteriorated.
Multi-functional flooding polymers is in clear water, and due to the existence of function base, molecule is interior, intermolecular to interconnect, and form fine and close reticulated structure, mesh is not obvious.In sewage solution, multi-functional flooding polymers is intermolecular, connect each other in molecule, forms the space net structure of layer stereo, makes every effort to minimum with the volume of waste water.There is node, chain bundle between mesh and mesh, chain bundle, mesh, node combine the space net structure forming solid.The existing supporting role of this grid structure, adsorbs again and wraps up large quantity of moisture generation deformation resistance, increasing substantially soltion viscosity.
Can draw from above-mentioned analysis: due to the existence of function base, in the solution, molecule is interior, intermolecular suitable combination, forms space multistory reticulated structure, therefore has very strong tackifying for multi-functional flooding polymers.
Experimental program 2: the emulsifying property of multi-functional flooding polymers
(1) multi-functional flooding polymers solution obtained for embodiment 1 and common M6000 polymers soln and crude oil are added in colorimetric cylinder by different ratios.
(2), after solution in colorimetric cylinder being rocked 3 ~ 5 minutes, leave standstill and observe.
Experimental result and analysis 2:
Rock evenly after multi-functional flooding polymers solution mixes by different ratios with crude oil, no matter multi-functional flooding polymers concentration is lower concentration 600mg/L, or 1000mg/L, all can not layering at once after rocking; And common M6000 polymers soln and oil mix than 1:5 by fluid, not emulsification after rocking, after static placement, layering at once, shows that multi-functional flooding polymers has good emulsifying capacity.
Experimental program 3: the resistance coefficient of multi-functional flooding polymers and residual resistance factor
The multi-functional flooding polymers that Example 1 is obtained, be the multi-functional flooding polymers solution (after shearing) of 1000mg/L by waste water concentration, M6000 polymer concentration is after 1000mg/L(shears).The basic data of the rock core of experiment is in table 1.
Table 1: the basic data of experiment rock core
| Rock core number | Length (cm) | Diameter (cm) | Porosity (%) | Perm-plug method (md) |
| 1-1 | 10.63 | 2.50 | 26.31 | 566 |
| 2-1 | 10.51 | 2.50 | 24.58 | 595 |
Experimentation salinity is the simulated formation water of 4000mg/L, rock core of finding time, saturated local water, measures the void volume of rock core; First; water drive is carried out with the constant flow rate of 0.3mL/min; the pressure difference data at two ends is imported and exported according to rock core; the water phase permeability of rock core is measured with Darcy's law; then multi-functional flooding polymers solution and M6000 polymers soln is injected respectively with identical speed again; after rock core pressure at two ends is stable, measure resistance coefficient; Finally, transfer water drive to, measure residual resistance factor.
Experimental result and analysis 3:
Table 2: the resistance coefficient of multi-functional flooding polymers in rock core and residual resistance factor
The resistance coefficient of table 3:M6000 polymkeric substance in rock core and residual resistance factor
Experimental result shows: compared with the M6000 polymers soln of same concentration, and the resistance coefficient of multi-functional flooding polymers solution and residual resistance factor all will exceed a lot, can better play Polymer enlargement swept volume and improve recovery ratio.
Meanwhile, the multi-functional flooding polymers adopting embodiment 2-5 obtained also distinguishes above-mentioned three experimental programs, and result is consistent with the experimental result of the multi-functional flooding polymers adopting embodiment 1 obtained.
Conclusion
By above Experimental Comparison, can find out, relatively and general polymer, multi-functional flooding polymers has very strong thickening, emulsifying capacity and higher oil recovering ability to multi-functional flooding polymers of the present invention.
Claims (2)
1. a preparation method for multi-functional flooding polymers, is characterized in that:
(1) start the stirring arm of reactor, add 300 parts, water, polyacrylamide is 20 parts;
(2) then join in reactor by the formaldehyde-dimethylamine solution of 16 parts of formaldehyde and 20 parts of dimethylamine mixed preparing under the state vacuumizing deoxygenation, controlling temperature of reaction is 25 ~ 35 DEG C, 100 ~ 120 minutes isothermal reaction time;
(3) after the first step reaction terminates, drop into the formaldehyde solution of 10 parts and the sodium bisulfite of 18 parts, with alkaline solution adjust ph to 11.0 ~ 13.0 that concentration is 20%, second step reaction is carried out in even rapid temperature increases to 65 ~ 85 DEG C, wherein concentration is alkali metal hydroxide 5 parts in the alkaline solution of 20%, 20 parts, water; 80 ~ 90 minutes isothermal reaction time;
(4) be then cooled to normal temperature, the methyl sulfate adding 16 parts reacts 40 ~ 60 minutes, the final polymkeric substance obtaining this product.
Described alkali metal hydroxide is the wherein one in sodium hydroxide, potassium hydroxide, calcium hydroxide, hydrated barta.
2. a multi-functional flooding polymers, is characterized in that: prepared by following weight proportion preparation method according to claim 1 by following raw material;
Polyacrylamide is 20 parts, water is 320 parts, formaldehyde is 26 parts, dimethylamine is 20 parts, sodium bisulfite is 18 parts, alkali metal hydroxide is 5 parts, methyl sulfate is 16 parts.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108238689A (en) * | 2018-01-16 | 2018-07-03 | 航天凯天环保科技股份有限公司 | A kind of processing method of polymer flooding oily water |
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|---|---|---|---|---|
| US6387998B1 (en) * | 1997-10-29 | 2002-05-14 | Kemira Chemicals Oy | Process for preparing a cationically modified (meth)acrylamide polymer and use of the polymer |
| CN102336867A (en) * | 2011-06-29 | 2012-02-01 | 陆明富 | Preparation method of tackifier for drilling fluid |
| CN102702401A (en) * | 2012-07-06 | 2012-10-03 | 河南省科学院高新技术研究中心 | Synthesis method of cationic polyacrylamide with ionic degree of 65-78% |
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| US6387998B1 (en) * | 1997-10-29 | 2002-05-14 | Kemira Chemicals Oy | Process for preparing a cationically modified (meth)acrylamide polymer and use of the polymer |
| CN102336867A (en) * | 2011-06-29 | 2012-02-01 | 陆明富 | Preparation method of tackifier for drilling fluid |
| CN102702401A (en) * | 2012-07-06 | 2012-10-03 | 河南省科学院高新技术研究中心 | Synthesis method of cationic polyacrylamide with ionic degree of 65-78% |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108238689A (en) * | 2018-01-16 | 2018-07-03 | 航天凯天环保科技股份有限公司 | A kind of processing method of polymer flooding oily water |
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