CN116333710B - High-temperature-resistant viscosity reducer for oil extraction and preparation method thereof - Google Patents
High-temperature-resistant viscosity reducer for oil extraction and preparation method thereof Download PDFInfo
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 38
- 238000000605 extraction Methods 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 22
- ZZTCPWRAHWXWCH-UHFFFAOYSA-N diphenylmethanediamine Chemical compound C=1C=CC=CC=1C(N)(N)C1=CC=CC=C1 ZZTCPWRAHWXWCH-UHFFFAOYSA-N 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 17
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 17
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000012986 chain transfer agent Substances 0.000 claims abstract description 15
- 239000008367 deionised water Substances 0.000 claims abstract description 15
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 15
- 239000003513 alkali Substances 0.000 claims abstract description 14
- 239000003999 initiator Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 28
- 238000006243 chemical reaction Methods 0.000 claims description 25
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- DKIDEFUBRARXTE-UHFFFAOYSA-N 3-mercaptopropanoic acid Chemical compound OC(=O)CCS DKIDEFUBRARXTE-UHFFFAOYSA-N 0.000 claims description 7
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 6
- 229920000053 polysorbate 80 Polymers 0.000 claims description 6
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000003921 oil Substances 0.000 abstract description 31
- 239000010779 crude oil Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 13
- 230000009467 reduction Effects 0.000 abstract description 9
- 230000018044 dehydration Effects 0.000 abstract description 3
- 238000006297 dehydration reaction Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 19
- 238000011084 recovery Methods 0.000 description 10
- 230000001603 reducing effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 6
- 239000007924 injection Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000013065 commercial product Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- -1 polyoxyethylene laurate Polymers 0.000 description 2
- CYIDZMCFTVVTJO-UHFFFAOYSA-N pyromellitic acid Chemical compound OC(=O)C1=CC(C(O)=O)=C(C(O)=O)C=C1C(O)=O CYIDZMCFTVVTJO-UHFFFAOYSA-N 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- HNNQYHFROJDYHQ-UHFFFAOYSA-N 3-(4-ethylcyclohexyl)propanoic acid 3-(3-ethylcyclopentyl)propanoic acid Chemical compound CCC1CCC(CCC(O)=O)C1.CCC1CCC(CCC(O)=O)CC1 HNNQYHFROJDYHQ-UHFFFAOYSA-N 0.000 description 1
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 1
- 229920006197 POE laurate Polymers 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical group CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/04—Anhydrides, e.g. cyclic anhydrides
- C08F222/06—Maleic anhydride
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/588—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific polymers
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention provides a high-temperature-resistant viscosity reducer for oil extraction and a preparation method thereof, wherein the high-temperature-resistant viscosity reducer for oil extraction is mainly prepared from the following raw materials in parts by weight: 10-20 parts of diphenyl methane diamine, 15-30 parts of maleic anhydride, 5-15 parts of an initiator, 15-25 parts of acrylic acid and 5-10 parts of a chain transfer agent; 15-25 parts of emulsifying agent, 8-15 parts of alkali liquor and 30-60 parts of deionized water. The high-temperature-resistant viscosity reducer for oil extraction prepared by the invention has good compatibility with other assistants, does not influence crude oil extraction and later crude oil dehydration, is used at a high temperature of 230 ℃, has obvious viscosity reduction effect, and has simple preparation process and low cost.
Description
Technical Field
The invention relates to the technical field of oilfield chemical additives, in particular to a high-temperature-resistant viscosity reducer for oil extraction and a preparation method thereof.
Background
With the penetration of the limit degree of the crude oil extraction technology, the extraction difficulty is gradually increased, so that the improvement of the oil recovery ratio is a problem generally concerned in the whole industry. Tertiary oil recovery is a technology for improving the recovery ratio of crude oil in an oil field, and is realized by water injection, gas injection, chemical injection, ultrasonic stimulation, microorganism injection or heat recovery and other methods. The popularization and application of tertiary oil recovery play an important role in improving the recovery rate of crude oil and stabilizing the crude oil yield of an oil field.
At present, common thickened oil fields are generally developed by water injection, and super thickened oil fields are generally developed by steam injection. The viscosity of crude oil is 2000-100000 mPa.s, and the viscosity of crude oil is high, the fluidity is poor, and great difficulty is brought to exploitation and gathering and transportation. To improve steam injection quality and reduce crude oil viscosity, recovery is typically performed with reinjection of steam-assisted viscosity reducers.
The viscosity reducer used in the oil field is divided into an oil-soluble viscosity reducer and a water-soluble viscosity reducer, wherein the oil-soluble viscosity reducer is flammable in solvent and low in flash point, and the water-soluble viscosity reducer is generally adopted in consideration of safety of field use.
However, most of the existing water-soluble viscosity reducers are easy to decompose at high temperature and have poor thermal stability, and the viscosity reducing capacity of the water-soluble viscosity reducer is greatly reduced under the condition of matching steam at high temperature when thick oil is extracted.
Disclosure of Invention
In view of the above, a first object of the present invention is to provide a high temperature resistant viscosity reducer for oil recovery, which can improve recovery efficiency without affecting viscosity reduction effect under high temperature conditions.
The second aim of the invention is to provide a preparation method of the high-temperature-resistant viscosity reducer for oil extraction, which has simple production process and convenient field application.
In order to achieve the above object of the present invention, the following technical solutions are specifically adopted:
The high-temperature-resistant viscosity reducer for oil extraction is mainly prepared from the following raw materials in parts by weight: 10-20 parts of diphenyl methane diamine, 15-30 parts of maleic anhydride, 5-15 parts of an initiator, 15-25 parts of acrylic acid and 5-10 parts of a chain transfer agent; 15-25 parts of emulsifying agent, 8-15 parts of alkali liquor and 30-60 parts of deionized water.
Preferably, the high-temperature-resistant viscosity reducer for oil extraction is mainly prepared from the following raw materials in parts by weight: 11-19 parts of diphenyl methane diamine, 16-29 parts of maleic anhydride, 6-14 parts of an initiator, 16-24 parts of acrylic acid and 6-9 parts of a chain transfer agent; 16-24 parts of emulsifying agent, 9-14 parts of alkali liquor and 31-59 parts of deionized water.
Preferably, the high-temperature-resistant viscosity reducer for oil extraction is mainly prepared from the following raw materials in parts by weight: 15 parts of diphenyl methane diamine, 22 parts of maleic anhydride, 10 parts of an initiator, 20 parts of acrylic acid and 8 parts of a chain transfer agent; 20 parts of emulsifying agent, 12 parts of alkali liquor and 45 parts of deionized water.
Further, the initiator is any one of potassium persulfate and ammonium persulfate.
Further, the chain transfer agent is any one of thioglycollic acid and mercaptopropionic acid.
Further, the emulsifier is any one of OP-10, tween 80 and span 80.
Further, the alkali liquor is 30% sodium hydroxide aqueous solution.
The invention also provides a preparation method of the high-temperature-resistant viscosity reducer for oil extraction, which comprises the following steps:
Adding diphenyl methane diamine and deionized water into a reaction kettle, heating to 60+/-5 ℃, stirring for 38-42min, and stirring until the diphenyl methane diamine and the deionized water are completely dissolved;
adding maleic anhydride and acrylic acid into a reaction kettle, continuously stirring for 18-22min, adding an initiator into the reaction kettle for three times, heating to 80+/-2 ℃, and continuously stirring for reaction for 3.5-4.5h;
adding chain transfer agent and emulsifier into a reaction kettle, continuously stirring for 55-65min, cooling to 42-48 ℃, adding the rest deionized water, adding alkali liquor to adjust pH to 6.5-7.5, and continuously stirring for 28-32min.
Among the above raw materials, diphenylmethane diamine can be used as a solvent, a stabilizer, or the like.
The copolymer of maleic anhydride and acrylic acid is prepared by adding acrylic acid into maleic anhydride for copolymerization and then hydrolyzing, and can be used as a scale and corrosion inhibitor, wherein maleic anhydride and acrylic acid are used as monomers, ammonium persulfate or potassium persulfate is used as an initiator, and the phosphorus-free builder synthesized by adopting an aqueous solution polymerization method has excellent high temperature resistance, can be used under severe conditions such as 300 ℃ high temperature and the like, and has high thermal stability; has good compatibility and synergy with other water treatment medicaments.
Chain transfer agents are also known as relative molecular mass modifiers, which are effective in effecting free radical transfer of chain-growth radicals to regulate the relative molecular mass of the polymer. Chain transfer agents may be used to control the chain length of the polymer, i.e., to control the degree of polymerization of the polymer, or the viscosity of the polymer. Generally, the more chain transfer agent is added, the shorter the chain of the polymer, and the lower the viscosity.
Emulsifiers are substances which enable a mixed liquid of two or more components which are not compatible with each other to form a stable emulsion. The principle of action is that during emulsification, the dispersed phase is dispersed in the continuous phase in the form of droplets (micron-sized), the emulsifier reduces the interfacial tension of the components in the mixed system, and forms a stronger film on the surface of the droplets or an electric double layer on the surface of the droplets due to the charges given by the emulsifier, preventing the droplets from aggregating with each other, and maintaining a uniform emulsion. The emulsifier is a surfactant, and has hydrophilic group and lipophilic group in the molecule. The "hydrophilic-lipophilic balance (HLB value)" is generally used to indicate the hydrophilicity or lipophilicity of an emulsifier, the lower the HLB value, the more lipophilic it is; conversely, the higher the HLB value, the more hydrophilic it is. The emulsifier OP-10, tween 80 or span 80 adopted by the invention is dissolved in oil and organic solvent, has lipophilicity and is used as an oil emulsifying dispersant.
The alkali liquor can also have viscosity reduction effect on the thick oil, the crude oil contains some acidic substances such as fatty acid, naphthenic acid, pyromellitic acid and asphaltic acid, the acidic substances are potential surface active substances and can be activated by alkali to form O/W type emulsifying agent, and under the action of the emulsifying agent, the thick oil and water form O/W type emulsion, so that viscosity can be reduced greatly. The thick oil is emulsified and reduced in viscosity by adopting alkali liquor, so that the effect is remarkable.
In the raw material formula, the mass ratio of the four components of diphenyl methane diamine, maleic anhydride, an initiator and acrylic acid is approximately 1:1.5:0.75: and 1.25, the viscosity reduction effect is optimal.
The chain transfer agent and the emulsifier are specially adopted to carry out synergism on the whole viscosity reducer, the chain transfer agent is mercaptoacetic acid or mercaptopropionic acid, the emulsifier is OP-10, tween 80 or span 80, the viscosity reducing effect of the viscosity reducer is obviously enhanced by adding the chain transfer agent and the emulsifier, and the effect is strongest when the mass ratio of the chain transfer agent to the emulsifier is 1:2.5, because the consumption of the chain transfer agent and the emulsifier can ensure that the viscosity reducing effect of the whole viscosity reducer can be influenced if the addition of the chain transfer agent and the emulsifier is too large in a relatively balanced state.
Compared with the prior art, the invention has the beneficial effects that:
The high-temperature-resistant viscosity reducer for oil extraction prepared by the invention has good compatibility with other assistants, does not influence crude oil extraction and later crude oil dehydration, is used at a high temperature of 230 ℃, has obvious viscosity reduction effect, and has simple preparation process and low cost.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
Example 1
(1) Adding 10 parts of diphenyl methane diamine and 30 parts of deionized water into a reaction kettle, heating to 60+/-5 ℃, and stirring for 40min until the diphenyl methane diamine and the deionized water are completely dissolved;
(2) Adding 15 parts of maleic anhydride and 15 parts of acrylic acid into a reaction kettle, and continuously stirring for 20min;
(3) Adding 5 parts of potassium persulfate into a reaction kettle for three times, heating to 80+/-2 ℃, and continuously stirring for reaction for 4 hours;
(4) Adding 5 parts of mercaptopropionic acid and 80 parts of span into a reaction kettle, and continuously stirring for 60min;
(5) Cooling to 45deg.C, adding alkali liquor to adjust pH to 7.5, and stirring for 30min.
Example 2
(1) Adding 20 parts of diphenyl methane diamine and 60 parts of deionized water into a reaction kettle, heating to 60+/-5 ℃, and stirring for 40min until the diphenyl methane diamine and the deionized water are completely dissolved;
(2) Adding 30 parts of maleic anhydride and 25 parts of acrylic acid into a reaction kettle, and continuously stirring for 20min;
(3) Adding 15 parts of ammonium persulfate into a reaction kettle for three times, heating to 80+/-2 ℃, and continuously stirring for reaction for 4 hours;
(4) Adding 10 parts of mercaptopropionic acid and 25 parts of tween 80 into a reaction kettle, and continuously stirring for 60min;
(5) Cooling to 45deg.C, adding alkali liquor to adjust pH to 7.0, and stirring for 30min.
Example 3
(1) Adding 15 parts of diphenyl methane diamine and deionized water into a reaction kettle, heating to 60+/-5 ℃, and stirring for 40min until the diphenyl methane diamine is completely dissolved;
(2) Adding 22 parts of maleic anhydride and 20 parts of acrylic acid into a reaction kettle, and continuously stirring for 20min;
(3) Adding 10 parts of potassium persulfate into a reaction kettle for three times, heating to 80+/-2 ℃, and continuously stirring for reaction for 4 hours;
(4) Adding 8 parts of mercaptopropionic acid and 80 parts of span into a reaction kettle, and continuously stirring for 60min;
(5) Cooling to 45 ℃, adding alkali liquor to adjust the pH value to 7.5, and continuously stirring for 30min to obtain the high-temperature-resistant viscosity reducer.
Comparative example 1
The procedure is as in example 2, except that 5 parts of diphenylmethane diamine are used.
Comparative example 2
The specific procedure is as in example 2, except that 8 parts of maleic anhydride are used.
Comparative example 3
The specific procedure was as in example 2, except for 3 parts of potassium persulfate.
Comparative example 4
The specific procedure was as in example 2, except for 10 parts of acrylic acid.
Comparative example 5
Commercial product 1: viscosity reducer POEM (polyoxyethylene laurate).
Comparative example 6
Commercial product 2: and the viscosity reducer is nonylphenol polyoxyethylene (4) ether ammonium sulfate.
Test results
The viscosity reduction performance of the above examples was tested as follows.
Crude oil is selected for test evaluation: density 1.0328g/cm3, asphaltene content 19.3%, wax content: 14.6%, surface crude oil viscosity: 800000 mPas (50 ℃), water: 5.6%, freezing point: 55 ℃ and sulfur content: 0.47%.
The viscosity reducer for thick oil prepared in examples 1 to 3 and comparative examples 1 to 4 and the commercially available viscosity reducer for comparative examples 5 and 6, which were added to thick oil in an amount of 0.5wt% based on the total mass of thick oil, were measured at 50℃at 150℃and at 230℃by using a rotational viscosity meter after stirring for 1 hour, and the viscosity reduction rate was calculated, and the measurement results are shown in Table 1:
TABLE 1
| Viscosity reducer | 50℃(％) | 150℃(％) | 230℃(％) |
| Example 1 | 96.8 | 95.1 | 92.3 |
| Example 2 | 97.2 | 96.2 | 93.7 |
| Example 3 | 96.3 | 95.3 | 92.9 |
| Comparative example 1 | 93.5 | 92.3 | 89.6 |
| Comparative example 2 | 94.3 | 93.2 | 88.7 |
| Comparative example 3 | 92.9 | 92.0 | 85.4 |
| Comparative example 4 | 93.1 | 91.9 | 89.1 |
| Comparative example 5 commercial product 1 | 92.4 | 50.5 | 32.5 |
| Comparative example 6 commercial product 2 | 93.1 | 51.6 | 31.6 |
As can be seen from the data in Table 1, the high temperature resistant viscosity reducer for oil recovery of the present invention has a viscosity reduction rate superior to that of comparative examples 1 to 4 and the commercially available viscosity reducer through a reasonable composition to mass ratio. And the blending ratio used in example 2 of the present invention is most excellent in effect.
As for the comparison result of comparative example 1 and example 2, when the amount of diphenylmethane diamine is 5 parts, the decrease in mass ratio of diphenylmethane diamine in all components has a certain effect on the viscosity reducing efficiency thereof, and thus the viscosity reducing effect is reduced.
For the comparison result of comparative example 2 with example 2, when the amount of maleic anhydride is 8 parts, the mass ratio of maleic anhydride in all components is reduced, affecting the viscosity-reducing efficiency, and thus the viscosity-reducing effect is reduced.
For the comparison result of comparative example 3 and example 2, when the amount of the initiator potassium persulfate is3 parts, the mass ratio of the initiator in all components is reduced, which affects the viscosity-reducing efficiency, and thus the viscosity-reducing effect is reduced.
For the comparison result of comparative example 4 with example 2, when the amount of acrylic acid is 10 parts, the mass ratio of acrylic acid in all components is reduced, affecting the viscosity-reducing efficiency, and thus the viscosity-reducing effect is reduced.
Comparing example 2 with examples 1 and 3 in Table 1, it can be seen that the viscosity reduction effect is best when the components are added in the upper part of the range.
In a word, the high-temperature-resistant viscosity reducer for oil extraction prepared by the embodiment of the invention contains viscosity reducing components with various different mechanisms, the components are not mutually contradicted, the compatibility with other auxiliary agents is good, the crude oil extraction and the later-stage crude oil dehydration are not influenced, the viscosity reducing effect is obvious when the viscosity reducer is used under the high-temperature condition of 230 ℃, the preparation process is simple, the cost is low, and the viscosity reducer is the high-temperature-resistant viscosity reducer meeting the sustainable development requirement.
While particular embodiments of the present invention have been illustrated and described, it will be appreciated that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
Claims (1)
1. The high-temperature-resistant viscosity reducer for oil extraction is characterized by being prepared from the following raw materials in parts by weight: 20 parts of diphenylmethane diamine, 30 parts of maleic anhydride, 15 parts of initiator ammonium persulfate, 25 parts of acrylic acid and 10 parts of chain transfer agent mercaptopropionic acid; 25 parts of emulsifier Tween 80, 8-15 parts of alkali liquor and 60 parts of deionized water;
The preparation method of the high-temperature-resistant viscosity reducer for oil extraction comprises the following steps:
adding 20 parts of diphenyl methane diamine and 60 parts of deionized water into a reaction kettle, heating to 60+/-5 ℃, stirring for 40min, and stirring until the components are completely dissolved;
adding 30 parts of maleic anhydride and 25 parts of acrylic acid into a reaction kettle, continuously stirring for 20min, adding 15 parts of initiator ammonium persulfate into the reaction kettle for three times, heating to 80+/-2 ℃, and continuously stirring for reaction for 4h;
adding 10 parts of chain transfer agent mercaptopropionic acid and 25 parts of emulsifier Tween 80 into a reaction kettle, continuously stirring for 60min, cooling to 45 ℃, adding the rest deionized water, adding alkali liquor to adjust the pH to 7.0, and continuously stirring for 30min.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102363726A (en) * | 2010-12-10 | 2012-02-29 | 新疆德蓝股份有限公司 | Novel oil soluble viscosity breaking agent for thickened oil recovery |
| CN104130756A (en) * | 2014-07-01 | 2014-11-05 | 青岛蓬勃石油技术服务有限公司 | High-temperature-resistant viscosity reducer for viscous oil and preparation method thereof |
| CN108822252A (en) * | 2018-07-05 | 2018-11-16 | 北京百特泰科能源工程技术有限公司 | Amphiphilic macromolecule viscous crude activator and its application |
| CN109021948A (en) * | 2018-08-29 | 2018-12-18 | 江苏师范大学 | A kind of preparation method of novel heavy crude thinner |
| CN113403053A (en) * | 2020-03-16 | 2021-09-17 | 中国石油化工股份有限公司 | Oil-soluble thick oil viscosity reducer |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102363726A (en) * | 2010-12-10 | 2012-02-29 | 新疆德蓝股份有限公司 | Novel oil soluble viscosity breaking agent for thickened oil recovery |
| CN104130756A (en) * | 2014-07-01 | 2014-11-05 | 青岛蓬勃石油技术服务有限公司 | High-temperature-resistant viscosity reducer for viscous oil and preparation method thereof |
| CN108822252A (en) * | 2018-07-05 | 2018-11-16 | 北京百特泰科能源工程技术有限公司 | Amphiphilic macromolecule viscous crude activator and its application |
| CN109021948A (en) * | 2018-08-29 | 2018-12-18 | 江苏师范大学 | A kind of preparation method of novel heavy crude thinner |
| CN113403053A (en) * | 2020-03-16 | 2021-09-17 | 中国石油化工股份有限公司 | Oil-soluble thick oil viscosity reducer |
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