CN111793168A - High-temperature-resistant salt-resistant filtrate reducer quadripolymer for drilling fluid - Google Patents
High-temperature-resistant salt-resistant filtrate reducer quadripolymer for drilling fluid Download PDFInfo
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- CN111793168A CN111793168A CN202010789472.5A CN202010789472A CN111793168A CN 111793168 A CN111793168 A CN 111793168A CN 202010789472 A CN202010789472 A CN 202010789472A CN 111793168 A CN111793168 A CN 111793168A
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- 238000005553 drilling Methods 0.000 title claims abstract description 48
- 239000012530 fluid Substances 0.000 title claims abstract description 45
- 239000000706 filtrate Substances 0.000 title claims abstract description 43
- 150000003839 salts Chemical class 0.000 title claims abstract description 42
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 41
- 229920000642 polymer Polymers 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract 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 abstract description 22
- 239000008367 deionised water Substances 0.000 claims abstract description 21
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 21
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 claims abstract description 12
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229940047670 sodium acrylate Drugs 0.000 claims abstract description 12
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims abstract description 11
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims abstract description 11
- 239000003999 initiator Substances 0.000 claims abstract description 11
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims abstract description 11
- 239000000654 additive Substances 0.000 claims abstract description 10
- 230000000996 additive effect Effects 0.000 claims abstract description 10
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims abstract description 9
- 229920006029 tetra-polymer Polymers 0.000 claims abstract description 7
- -1 acrylamide propyl sodium Chemical compound 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 45
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 35
- 238000003756 stirring Methods 0.000 claims description 35
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 30
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 30
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 claims description 30
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 20
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 claims description 20
- 239000011259 mixed solution Substances 0.000 claims description 20
- 238000005406 washing Methods 0.000 claims description 20
- 239000000243 solution Substances 0.000 claims description 17
- LRWZZZWJMFNZIK-UHFFFAOYSA-N 2-chloro-3-methyloxirane Chemical compound CC1OC1Cl LRWZZZWJMFNZIK-UHFFFAOYSA-N 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- JBIROUFYLSSYDX-UHFFFAOYSA-M benzododecinium chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 JBIROUFYLSSYDX-UHFFFAOYSA-M 0.000 claims description 11
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- CKRZKMFTZCFYGB-UHFFFAOYSA-N N-phenylhydroxylamine Chemical compound ONC1=CC=CC=C1 CKRZKMFTZCFYGB-UHFFFAOYSA-N 0.000 claims description 10
- 229920002472 Starch Polymers 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 239000005457 ice water Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- 239000002244 precipitate Substances 0.000 claims description 10
- 229910052708 sodium Inorganic materials 0.000 claims description 10
- 239000011734 sodium Substances 0.000 claims description 10
- 235000019698 starch Nutrition 0.000 claims description 10
- 239000008107 starch Substances 0.000 claims description 10
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- FWFUWXVFYKCSQA-UHFFFAOYSA-M sodium;2-methyl-2-(prop-2-enoylamino)propane-1-sulfonate Chemical compound [Na+].[O-]S(=O)(=O)CC(C)(C)NC(=O)C=C FWFUWXVFYKCSQA-UHFFFAOYSA-M 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 2
- 125000002843 carboxylic acid group Chemical group 0.000 abstract description 3
- 125000005371 silicon functional group Chemical group 0.000 abstract description 3
- 125000000542 sulfonic acid group Chemical group 0.000 abstract description 3
- 230000033558 biomineral tissue development Effects 0.000 abstract description 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 230000003301 hydrolyzing effect Effects 0.000 abstract 1
- 239000004927 clay Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000005755 formation reaction Methods 0.000 description 6
- FJANPTQNXLPMKX-UHFFFAOYSA-N CC(C)(C[Na])NC(=O)C=C Chemical compound CC(C)(C[Na])NC(=O)C=C FJANPTQNXLPMKX-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 230000001603 reducing effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000036571 hydration Effects 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 4
- 125000000524 functional group Chemical group 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000011085 pressure filtration Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 125000001453 quaternary ammonium group Chemical group 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 229920000536 2-Acrylamido-2-methylpropane sulfonic acid Polymers 0.000 description 1
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical compound OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical class O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000006467 substitution reaction Methods 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
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
-
- 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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Macromonomer-Based Addition Polymer (AREA)
Abstract
The invention discloses a high-temperature-resistant salt-resistant filtrate reducer quaternary polymer for drilling fluid, which is prepared from the following raw materials in parts by weight: 100 portions of deionized water, 20 to 30 portions of 2-methyl-2 acrylamide propyl sodium sulfonate, 8 to 10 portions of sodium acrylate, 11 to 15 portions of N-vinyl pyrrolidone, 40 to 60 portions of ammonium persulfate, 40 to 60 portions of sodium bisulfite, 10 to 14 portions of macromonomer and 0.1 to 0.5 portion of initiator; the surface of the macromonomer is positively charged, and an organic silicon functional group is introduced, so that the high temperature resistance of the filtrate reducer is improved, and the high temperature resistance of the polymer is further improved by adopting the structures of C-C, C-S, C-N and the like of the side chain of the high temperature resistant salt-resistant filtrate reducer tetrapolymer for the drilling fluid; the side chain is also introduced with sulfonic acid group and carboxylic acid group, thus enhancing the hydrolytic capability and high-temperature resistance and salt resistance of the fluid loss additive under high temperature and high mineralization.
Description
Technical Field
The invention belongs to the technical field of preparation of filtrate reducer, and particularly relates to a high-temperature-resistant salt-resistant filtrate reducer quaternary polymer for drilling fluid.
Background
As the depth of the formation increases, the formation temperature increases and during drilling, saline formations are often encountered. The polymer filtrate reducer molecule mainly ensures the stability and the multi-stage dispersibility of the drilling fluid through the action of functional groups on the side chain and clay particles, thereby leading the drilling fluid to form compact and low-permeability mud cakes in the drilling process and reducing the filtrate loss of the drilling fluid. The presence of inorganic salts in the drilling fluid can also severely affect the effect of the functional groups and the clay particles, thereby resulting in a reduction in the fluid loss performance of the polymer. The fluid loss additive is used as a drilling fluid treating agent, and can still keep a good fluid loss reducing effect under the severe environment of high temperature, high pressure and high salinity. Although the types of the current filtrate reducers are various, the filtrate reducers with high temperature resistance and composite salt water resistance are not common.
The invention CN106432632A provides an amino polymer fluid loss additive for a high-temperature-resistant and salt-resistant water-based drilling fluid, and a preparation method and application thereof, wherein the fluid loss additive is prepared from acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, allyl polyethylene glycol and trihydroxyethyl allyl ammonium bromide, the molar ratio of the four monomers is 8.1-20.2: 9-15.2: 2.1-4.3: 8 to 10. The filtrate reducer can be effectively adsorbed on clay particles, and simultaneously, hydration groups such as sulfonic groups and hydroxyl groups can bring adsorbed hydration layers to the clay particles, so that the space stability of a dispersion system is enhanced, the coalescence of fine particles is effectively inhibited, and compact mud cakes are formed, thereby achieving the effect of reducing the filtrate. Van der Waals force and electrostatic attraction exist between the cationic quaternary ammonium group and the clay particles with negative charges on the surface, the cationic quaternary ammonium group can be firmly adsorbed on the surface of the clay particles, and the rigidity of the main chain can be enhanced by the steric hindrance generated by the long side chain of the polyoxyethylene group, so that the temperature resistance of the polymer is improved.
Disclosure of Invention
In order to overcome the technical problems, the invention provides a high-temperature-resistant salt-resistant filtrate reducer quaternary polymer for drilling fluid.
The technical problems to be solved by the invention are as follows:
as the depth of the formation increases, the formation temperature also increases and during drilling, saline formations are often encountered; the presence of inorganic salts in the drilling fluid can also severely affect the effect of the functional groups and the clay particles, thereby resulting in a reduction in the fluid loss performance of the polymer. The fluid loss additive is used as a drilling fluid treating agent, and can still keep a good fluid loss reducing effect under the severe environment of high temperature, high pressure and high salinity.
The purpose of the invention can be realized by the following technical scheme:
the high-temperature-resistant salt-resistant filtrate reducer quaternary polymer for the drilling fluid is prepared from the following raw materials in parts by weight: 100 portions of deionized water, 20 to 30 portions of 2-methyl-2 acrylamide propyl sodium sulfonate, 8 to 10 portions of sodium acrylate, 11 to 15 portions of N-vinyl pyrrolidone, 40 to 60 portions of ammonium persulfate, 40 to 60 portions of sodium bisulfite, 10 to 14 portions of macromonomer and 0.1 to 0.5 portion of initiator;
the high-temperature-resistant salt-resistant filtrate reducer quadripolymer for the drilling fluid is prepared by the following steps:
step one, adding deionized water into a four-neck flask, then sequentially adding 2-methyl-2-acrylamido propanesulfonic acid sodium salt, sodium acrylate, N-vinyl pyrrolidone, ammonium persulfate and sodium bisulfite, and stirring for 30min under the conditions that the rotating speed is 300-400r/min and the temperature is 25-30 ℃ to obtain a first mixed solution;
secondly, adding sodium hydroxide with the mass fraction of 40% into the first mixed solution to adjust the pH value of the system to be 7-9, setting the temperature to be 50-70 ℃ and the rotating speed to be 400r/min, and reacting for 4-6h to obtain a second mixed solution;
and thirdly, adding a macromonomer and an initiator into the second mixed solution under the protection of nitrogen, setting the temperature to be 30-60 ℃ and the rotating speed to be 350-plus-450 r/min, reacting for 4-12h, washing for three times by using absolute ethyl alcohol, and drying at the temperature of 100-plus-120 ℃ to constant weight to prepare the high-temperature-resistant salt-resistant filtrate reducer quaternary polymer for the drilling fluid.
Further, the macromonomer is prepared by the following steps:
s11, adding phenylhydroxylamine and potassium iodide into a three-neck flask, stirring in an ice-water bath, setting the rotation speed to be 100-200r/min, dropwise adding epoxy chloropropane while stirring, keeping the rotation speed unchanged after the epoxy chloropropane is dropwise added, continuing to react for 2-3h in the ice-water bath, standing for 6-7 days at the temperature of 20-30 ℃ under the condition of keeping out of the sun after the reaction is finished, separating lower-layer viscous liquid by using a separating funnel, and washing the viscous liquid for three times by using ether to obtain a mixture A;
s12, adding sodium carboxymethyl starch and absolute ethyl alcohol into a three-mouth bottle, setting the rotation speed at 250-300r/min, stirring for 20min at the temperature of 25 ℃, adding deionized water and a sodium hydroxide solution with the mass fraction of 20% into the three-mouth bottle, raising the temperature to 60-70 ℃, adding dodecyl dimethyl benzyl ammonium chloride and the mixture A, keeping the rotation speed unchanged, stirring for 4-6h, cooling to 20-30 ℃, washing for three times by using the absolute ethyl alcohol, and drying at the temperature of 100-120 ℃ to constant weight to obtain a mixture B;
s13, adding the mixture B into a three-neck flask, firstly adding absolute ethyl alcohol, uniformly stirring, then adding dimethyl sulfoxide and toluene, uniformly stirring, adjusting the pH value to 3-5 by using 1mol/L hydrochloric acid solution, setting the temperature to be 60-70 ℃, introducing nitrogen, dropwise adding hexamethyldisilazane under the protection of nitrogen, reacting for 7-9h, cooling to 25 ℃, standing and filtering to obtain a precipitate, washing the precipitate for three times by using absolute ethyl alcohol, and drying at the temperature of 100 ℃ and 120 ℃ to constant weight to obtain the macromonomer.
Further, the ratio of the amounts of the substances of phenylhydroxylamine, potassium iodide and epichlorohydrin in step S11 is 1: 50-60: 10-13, and the epoxy chloropropane is dripped in 40 min; in the step S12, the mass ratio of the sodium carboxymethyl starch, the absolute ethyl alcohol, the deionized water, the sodium hydroxide solution with the mass fraction of 20%, the dodecyl dimethyl benzyl ammonium chloride and the mixture A is 4: 0.03: 26-30: 2-4: 1: 4; in the step S13, the mass ratio of the mixture B to the absolute ethyl alcohol to the dimethyl sulfoxide to the toluene to the hexamethyldisilazane is 4: 3: 26-30: 16-20: 2.
further, the average molecular weight of the prepared high-temperature-resistant salt-resistant filtrate reducer quadripolymer for the drilling fluid is 800 ten thousand.
The invention has the beneficial effects that:
the main chain of the high-temperature-resistant salt-resistant filtrate reducer quaternary polymer for the drilling fluid is of a C-C single bond structure, the average bond energy of the C-C single bonds is 347.3kJ/mol, and the quaternary polymer is not easy to degrade at high temperature; the side chain of the high-temperature-resistant salt-resistant filtrate reducer quaternary polymer for the drilling fluid has C-C, C-S and other structures provided by 2-methyl-2-acrylamido propanesulfonic acid sodium salt, has C-C, C-N and other structures provided by N-vinyl pyrrolidone, and has high structural bond energy of C-C, C-S, C-N and other structures, so that the temperature resistance of the polymer is further improved; the side chain is also introduced with a sulfonic acid group provided by 2-methyl-2 acrylamido propyl sodium sulfonate and a carboxylic acid group provided by sodium acrylate, and the sulfonic acid group and the carboxylic acid group can form a hydration film, so that the drilling fluid has stronger stability, and the hydrolysis capability of the fluid loss additive under high temperature and high mineralization is enhanced.
The surface of the macromonomer is positively charged, and an organic silicon functional group is introduced, so that the high temperature resistance of the fluid loss additive is improved, the average molecular weight of the high temperature resistant salt-resistant fluid loss additive quaternary polymer for the drilling fluid is 800 ten thousand, the quaternary polymer can be quickly adhered to the surfaces of drill cuttings and clay, and the effects of coating, flocculating and reducing fluid loss are achieved; the dodecyl dimethyl benzyl ammonium chloride is easy to dissolve in water, is a transparent solution, has no toxicity, does not corrode metal, is stable even in boiling water, can effectively prevent the filtrate reducer from further hydration expansion by introducing ammonium salt, ammonium salt and organic silicon functional groups, reduces the absorption of hydroxyl on the surface of the filtrate reducer, and reduces the apparent viscosity of the drilling fluid. The quaternary polymer of the high-temperature-resistant and salt-resistant filtrate reducer for the drilling fluid has strong salt and temperature resistance, the temperature resistance can reach 260 ℃, and the product performance is stable.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The high-temperature-resistant salt-resistant filtrate reducer quaternary polymer for the drilling fluid is prepared from the following raw materials in parts by weight: 100 parts of deionized water, 20 parts of 2-methyl-2-acrylamido propyl sodium sulfonate, 8 parts of sodium acrylate, 11 parts of N-vinyl pyrrolidone, 40 parts of ammonium persulfate, 40 parts of sodium bisulfite, 10 parts of macromonomer and 0.1 part of initiator;
the high-temperature-resistant salt-resistant filtrate reducer quadripolymer for the drilling fluid is prepared by the following steps:
step one, adding deionized water into a four-neck flask, then sequentially adding 2-methyl-2-acrylamido propanesulfonic acid sodium salt, sodium acrylate, N-vinyl pyrrolidone, ammonium persulfate and sodium bisulfite, and stirring for 30min under the conditions that the rotating speed is 300-400r/min and the temperature is 25 ℃ to obtain a first mixed solution;
secondly, adding sodium hydroxide with the mass fraction of 40% into the first mixed solution to adjust the pH value of a system to be 7, setting the temperature to be 50 ℃ and the rotating speed to be 300r/min, and reacting for 4 hours to obtain a second mixed solution;
and thirdly, adding a macromonomer and an initiator into the second mixed solution under the protection of nitrogen, setting the temperature at 30 ℃ and the rotating speed at 350r/min, reacting for 4 hours, washing for three times by using absolute ethyl alcohol, and drying at 100 ℃ to constant weight to obtain the high-temperature-resistant salt-resistant filtrate reducer quaternary polymer for the drilling fluid.
Wherein the macromonomer is prepared by the following steps:
s11, adding phenylhydroxylamine and potassium iodide into a three-neck flask, stirring in an ice-water bath at a set rotation speed of 100r/min, dropwise adding epoxy chloropropane while stirring, keeping the rotation speed unchanged after the epoxy chloropropane is dropwise added, continuing to react for 2 hours in the ice-water bath, standing for 6 days at a temperature of 20 ℃ under a dark condition after the reaction is finished, separating a lower-layer viscous liquid by using a separating funnel, and washing the viscous liquid for three times by using ethyl ether to obtain a mixture A;
s12, adding sodium carboxymethyl starch and absolute ethyl alcohol into a three-necked bottle, setting the rotating speed to be 250r/min, stirring for 20min at the temperature of 25 ℃, adding deionized water and a sodium hydroxide solution with the mass fraction of 20% into the three-necked bottle, raising the temperature to 60 ℃, adding dodecyl dimethyl benzyl ammonium chloride and the mixture A, keeping the rotating speed unchanged, stirring for 4h, cooling to 20 ℃, washing for three times by using the absolute ethyl alcohol, and drying to constant weight at the temperature of 100 ℃ to obtain a mixture B;
s13, adding the mixture B into a three-neck bottle, adding absolute ethyl alcohol, uniformly stirring, adding dimethyl sulfoxide and toluene, uniformly stirring, adjusting the pH value to 3 by using 1mol/L hydrochloric acid solution, setting the temperature to be 60 ℃, introducing nitrogen, dropwise adding hexamethyldisilazane under the protection of nitrogen, reacting for 7 hours, cooling to 25 ℃, standing and filtering to obtain a precipitate, washing the precipitate for three times by using absolute ethyl alcohol, and drying at 100 ℃ to constant weight to obtain the macromonomer.
Wherein the ratio of the amounts of phenylhydroxylamine, potassium iodide and epichlorohydrin in step S11 is 1: 50: 10, and finishing dripping the epoxy chloropropane within 40 min; in the step S12, the mass ratio of the sodium carboxymethyl starch, the absolute ethyl alcohol, the deionized water, the sodium hydroxide solution with the mass fraction of 20%, the dodecyl dimethyl benzyl ammonium chloride and the mixture A is 4: 0.03: 26: 2: 1: 4; in the step S13, the mass ratio of the mixture B to the absolute ethyl alcohol to the dimethyl sulfoxide to the toluene to the hexamethyldisilazane is 4: 3: 26: 16: 2.
example 2
The high-temperature-resistant salt-resistant filtrate reducer quaternary polymer for the drilling fluid is prepared from the following raw materials in parts by weight: 150 parts of deionized water, 25 parts of 2-methyl-2-acrylamido propyl sodium sulfonate, 9 parts of sodium acrylate, 13 parts of N-vinyl pyrrolidone, 50 parts of ammonium persulfate, 50 parts of sodium bisulfite, 12 parts of macromonomer and 0.3 part of initiator;
the high-temperature-resistant salt-resistant filtrate reducer quadripolymer for the drilling fluid is prepared by the following steps:
step one, adding deionized water into a four-neck flask, then sequentially adding 2-methyl-2-acrylamido propyl sodium sulfonate, sodium acrylate, N-vinyl pyrrolidone, ammonium persulfate and sodium bisulfite, and stirring for 30min at the rotating speed of 350r/min and the temperature of 26 ℃ to obtain a first mixed solution;
secondly, adding sodium hydroxide with the mass fraction of 40% into the first mixed solution to adjust the pH value of a system to be 8, setting the temperature to be 60 ℃ and the rotating speed to be 350r/min, and reacting for 5 hours to obtain a second mixed solution;
and thirdly, adding a macromonomer and an initiator into the second mixed solution under the protection of nitrogen, setting the temperature at 45 ℃ and the rotating speed at 300/min, reacting for 8 hours, washing for three times by using absolute ethyl alcohol, and drying at 110 ℃ to constant weight to obtain the high-temperature-resistant salt-resistant filtrate reducer quadripolymer for the drilling fluid.
Wherein the macromonomer is prepared by the following steps:
s11, adding phenylhydroxylamine and potassium iodide into a three-neck flask, stirring in an ice-water bath, setting the rotation speed to be 150r/min, dropwise adding epoxy chloropropane while stirring, keeping the rotation speed unchanged after the epoxy chloropropane is dropwise added, continuing to react for 2.5 hours in the ice-water bath, standing for 6 days at the temperature of 25 ℃ under the condition of keeping out of the sun after the reaction is finished, separating the lower-layer viscous liquid by using a separating funnel, and washing the viscous liquid for three times by using ether to obtain a mixture A;
s12, adding sodium carboxymethyl starch and absolute ethyl alcohol into a three-necked bottle, setting the rotating speed at 270r/min, stirring for 20min at the temperature of 25 ℃, adding deionized water and a sodium hydroxide solution with the mass fraction of 20% into the three-necked bottle, raising the temperature to 65 ℃, adding dodecyl dimethyl benzyl ammonium chloride and a mixture A, keeping the rotating speed unchanged, stirring for 5h, cooling to 25 ℃, washing for three times by using the absolute ethyl alcohol, and drying to constant weight at the temperature of 110 ℃ to obtain a mixture B;
s13, adding the mixture B into a three-neck bottle, adding absolute ethyl alcohol, uniformly stirring, adding dimethyl sulfoxide and toluene, uniformly stirring, adjusting the pH value to 4 by using 1mol/L hydrochloric acid solution, setting the temperature to 65 ℃, introducing nitrogen, dropwise adding hexamethyldisilazane under the protection of nitrogen, reacting for 8 hours, cooling to 25 ℃, standing and filtering to obtain a precipitate, washing the precipitate for three times by using absolute ethyl alcohol, and drying at 110 ℃ to constant weight to obtain the macromonomer.
Wherein the ratio of the amounts of phenylhydroxylamine, potassium iodide and epichlorohydrin in step S11 is 1: 55: 12, and finishing dripping the epoxy chloropropane within 40 min; in the step S12, the mass ratio of the sodium carboxymethyl starch, the absolute ethyl alcohol, the deionized water, the sodium hydroxide solution with the mass fraction of 20%, the dodecyl dimethyl benzyl ammonium chloride and the mixture A is 4: 0.03: 28: 3: 1: 4; in the step S13, the mass ratio of the mixture B to the absolute ethyl alcohol to the dimethyl sulfoxide to the toluene to the hexamethyldisilazane is 4: 3: 28: 18: 2.
example 3
The high-temperature-resistant salt-resistant filtrate reducer quaternary polymer for the drilling fluid is prepared from the following raw materials in parts by weight: 200 parts of deionized water, 30 parts of 2-methyl-2 acrylamide propyl sodium sulfonate, 10 parts of sodium acrylate, 15 parts of N-vinyl pyrrolidone, 60 parts of ammonium persulfate, 60 parts of sodium bisulfite, 14 parts of macromonomer and 0.5 part of initiator;
the high-temperature-resistant salt-resistant filtrate reducer quadripolymer for the drilling fluid is prepared by the following steps:
step one, adding deionized water into a four-neck flask, then sequentially adding 2-methyl-2-acrylamido propyl sodium sulfonate, sodium acrylate, N-vinyl pyrrolidone, ammonium persulfate and sodium bisulfite, and stirring for 30min at the rotation speed of 400r/min and the temperature of 30 ℃ to obtain a first mixed solution;
secondly, adding sodium hydroxide with the mass fraction of 40% into the first mixed solution to adjust the pH value of a system to be 9, setting the temperature to be 70 ℃ and the rotating speed to be 400r/min, and reacting for 6 hours to obtain a second mixed solution;
and thirdly, adding a macromonomer and an initiator into the second mixed solution under the protection of nitrogen, setting the temperature at 60 ℃ and the rotating speed at 450r/min, reacting for 12 hours, washing for three times by using absolute ethyl alcohol, and drying at 120 ℃ to constant weight to obtain the high-temperature-resistant salt-resistant filtrate reducer quaternary polymer for the drilling fluid.
Wherein the macromonomer is prepared by the following steps:
s11, adding phenylhydroxylamine and potassium iodide into a three-neck flask, stirring in an ice-water bath, setting the rotation speed to be 200r/min, dropwise adding epoxy chloropropane while stirring, keeping the rotation speed unchanged after the epoxy chloropropane is dropwise added, continuing to react for 3 hours in the ice-water bath, standing for 7 days at the temperature of 30 ℃ under the condition of keeping out of the sun after the reaction is finished, separating the lower-layer viscous liquid by using a separating funnel, and washing the viscous liquid for three times by using ethyl ether to obtain a mixture A;
s12, adding sodium carboxymethyl starch and absolute ethyl alcohol into a three-neck flask, setting the rotating speed to be 300r/min, stirring for 20min at the temperature of 25 ℃, adding deionized water and a sodium hydroxide solution with the mass fraction of 20% into the three-neck flask, raising the temperature to 70 ℃, adding dodecyl dimethyl benzyl ammonium chloride and the mixture A, keeping the rotating speed unchanged, stirring for 6h, cooling to 30 ℃, washing for three times by using the absolute ethyl alcohol, and drying to constant weight at the temperature of 120 ℃ to obtain a mixture B;
s13, adding the mixture B into a three-neck bottle, adding absolute ethyl alcohol, uniformly stirring, adding dimethyl sulfoxide and toluene, uniformly stirring, adjusting the pH value to 5 by using 1mol/L hydrochloric acid solution, setting the temperature to 70 ℃, introducing nitrogen, dropwise adding hexamethyldisilazane under the protection of nitrogen, reacting for 9 hours, cooling to 25 ℃, standing and filtering to obtain a precipitate, washing the precipitate for three times by using absolute ethyl alcohol, and drying at 120 ℃ to constant weight to obtain the macromonomer.
Wherein the ratio of the amounts of phenylhydroxylamine, potassium iodide and epichlorohydrin in step S11 is 1: 50-60: 10-13, and the epoxy chloropropane is dripped in 40 min; in the step S12, the mass ratio of the sodium carboxymethyl starch, the absolute ethyl alcohol, the deionized water, the sodium hydroxide solution with the mass fraction of 20%, the dodecyl dimethyl benzyl ammonium chloride and the mixture A is 4: 0.03: 30: 4: 1: 4; in the step S13, the mass ratio of the mixture B to the absolute ethyl alcohol to the dimethyl sulfoxide to the toluene to the hexamethyldisilazane is 4: 3: 30: 20: 2.
comparative example 1
The comparative example is a common quaternary polymer of the high-temperature-resistant salt-resistant filtrate reducer for the drilling fluid in the market.
The performance of the high-temperature-resistant and salt-resistant filtrate reducer tetrapolymers for the drilling fluid, which are prepared in the examples 1-3 and the comparative example 1, is tested, firstly, the high-temperature-resistant and salt-resistant filtrate reducer tetrapolymers for the drilling fluid, which are prepared in the examples 1-3 and the comparative example 1, are added into fresh water slurry and saturated brine slurry, and the addition amount of the filtrate reducer is 0.5 percent of the mass of the slurry; the normal temperature and pressure filtration loss and the normal temperature and pressure filtration loss after the high temperature aging of hot rolling for 16h at 260 ℃ are measured, and the detection results are shown in the following table 1:
TABLE 1
As can be seen from the above Table 1, the performances of the quaternary polymer of the high-temperature-resistant and salt-resistant filtrate reducer for drilling fluid prepared in the examples 1-3 are superior to those of the quaternary polymer of the comparative example 1, and the quaternary polymer of the high-temperature-resistant and salt-resistant filtrate reducer for drilling fluid prepared in the examples 1-3 has strong salt and temperature resistance, the temperature resistance can reach 260 ℃, and the product performance is stable.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (4)
1. The high-temperature-resistant salt-resistant filtrate reducer quaternary polymer for the drilling fluid is characterized by being prepared from the following raw materials in parts by weight: 100 portions of deionized water, 20 to 30 portions of 2-methyl-2 acrylamide propyl sodium sulfonate, 8 to 10 portions of sodium acrylate, 11 to 15 portions of N-vinyl pyrrolidone, 40 to 60 portions of ammonium persulfate, 40 to 60 portions of sodium bisulfite, 10 to 14 portions of macromonomer and 0.1 to 0.5 portion of initiator;
the high-temperature-resistant salt-resistant filtrate reducer quadripolymer for the drilling fluid is prepared by the following steps:
step one, adding deionized water into a four-neck flask, then sequentially adding 2-methyl-2-acrylamido propanesulfonic acid sodium salt, sodium acrylate, N-vinyl pyrrolidone, ammonium persulfate and sodium bisulfite, and stirring for 30min under the conditions that the rotating speed is 300-400r/min and the temperature is 25-30 ℃ to obtain a first mixed solution;
secondly, adding sodium hydroxide with the mass fraction of 40% into the first mixed solution to adjust the pH value of the system to be 7-9, setting the temperature to be 50-70 ℃ and the rotating speed to be 400r/min, and reacting for 4-6h to obtain a second mixed solution;
and thirdly, adding a macromonomer and an initiator into the second mixed solution under the protection of nitrogen, setting the temperature to be 30-60 ℃ and the rotating speed to be 350-plus-450 r/min, reacting for 4-12h, washing for three times by using absolute ethyl alcohol, and drying at the temperature of 100-plus-120 ℃ to constant weight to prepare the high-temperature-resistant salt-resistant filtrate reducer quaternary polymer for the drilling fluid.
2. The high temperature and salt resistant fluid loss additive tetrapolymer for drilling fluid according to claim 1, wherein the macromonomer is prepared by the steps of:
s11, adding phenylhydroxylamine and potassium iodide into a three-neck flask, stirring in an ice-water bath, setting the rotation speed to be 100-200r/min, dropwise adding epoxy chloropropane while stirring, keeping the rotation speed unchanged after the epoxy chloropropane is dropwise added, continuing to react for 2-3h in the ice-water bath, standing for 6-7 days at the temperature of 20-30 ℃ under the condition of keeping out of the sun after the reaction is finished, separating lower-layer viscous liquid by using a separating funnel, and washing the viscous liquid for three times by using ether to obtain a mixture A;
s12, adding sodium carboxymethyl starch and absolute ethyl alcohol into a three-mouth bottle, setting the rotation speed at 250-300r/min, stirring for 20min at the temperature of 25 ℃, adding deionized water and a sodium hydroxide solution with the mass fraction of 20% into the three-mouth bottle, raising the temperature to 60-70 ℃, adding dodecyl dimethyl benzyl ammonium chloride and the mixture A, keeping the rotation speed unchanged, stirring for 4-6h, cooling to 20-30 ℃, washing for three times by using the absolute ethyl alcohol, and drying at the temperature of 100-120 ℃ to constant weight to obtain a mixture B;
s13, adding the mixture B into a three-neck flask, firstly adding absolute ethyl alcohol, uniformly stirring, then adding dimethyl sulfoxide and toluene, uniformly stirring, adjusting the pH value to 3-5 by using 1mol/L hydrochloric acid solution, setting the temperature to be 60-70 ℃, introducing nitrogen, dropwise adding hexamethyldisilazane under the protection of nitrogen, reacting for 7-9h, cooling to 25 ℃, standing and filtering to obtain a precipitate, washing the precipitate for three times by using absolute ethyl alcohol, and drying at the temperature of 100 ℃ and 120 ℃ to constant weight to obtain the macromonomer.
3. The high temperature and salt resistant fluid loss additive tetrapolymer for drilling fluid according to claim 2, wherein the amount ratio of the substances of phenylhydroxylamine, potassium iodide and epichlorohydrin in step S11 is 1: 50-60: 10-13, and the epoxy chloropropane is dripped in 40 min; in the step S12, the mass ratio of the sodium carboxymethyl starch, the absolute ethyl alcohol, the deionized water, the sodium hydroxide solution with the mass fraction of 20%, the dodecyl dimethyl benzyl ammonium chloride and the mixture A is 4: 0.03: 26-30: 2-4: 1: 4; in the step S13, the mass ratio of the mixture B to the absolute ethyl alcohol to the dimethyl sulfoxide to the toluene to the hexamethyldisilazane is 4: 3: 26-30: 16-20: 2.
4. the high temperature and salt resistant filtrate reducer tetrapolymer for drilling fluid according to claim 1, wherein the average molecular weight of the prepared high temperature and salt resistant filtrate reducer tetrapolymer for drilling fluid is 800 ten thousand.
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