CN113512157B - High-temperature-resistant, salt-resistant and anti-collapse filtrate reducer and preparation method thereof - Google Patents
High-temperature-resistant, salt-resistant and anti-collapse filtrate reducer and preparation method thereof Download PDFInfo
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- 150000003839 salts Chemical class 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 25
- 239000000706 filtrate Substances 0.000 title claims abstract description 25
- 229920005610 lignin Polymers 0.000 claims abstract description 59
- 101001065065 Aspergillus awamori Feruloyl esterase A Proteins 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims description 38
- 230000015556 catabolic process Effects 0.000 claims description 34
- 238000006731 degradation reaction Methods 0.000 claims description 34
- 239000007788 liquid Substances 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000000243 solution Substances 0.000 claims description 22
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 20
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 20
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 20
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 20
- 238000005303 weighing Methods 0.000 claims description 19
- 239000002994 raw material Substances 0.000 claims description 17
- GQOKIYDTHHZSCJ-UHFFFAOYSA-M dimethyl-bis(prop-2-enyl)azanium;chloride Chemical compound [Cl-].C=CC[N+](C)(C)CC=C GQOKIYDTHHZSCJ-UHFFFAOYSA-M 0.000 claims description 16
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 16
- XFTALRAZSCGSKN-UHFFFAOYSA-M sodium;4-ethenylbenzenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C1=CC=C(C=C)C=C1 XFTALRAZSCGSKN-UHFFFAOYSA-M 0.000 claims description 14
- 240000008042 Zea mays Species 0.000 claims description 12
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 12
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 235000005822 corn Nutrition 0.000 claims description 12
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 12
- 108010093096 Immobilized Enzymes Proteins 0.000 claims description 11
- 230000035484 reaction time Effects 0.000 claims description 11
- 239000000696 magnetic material Substances 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 8
- 239000011259 mixed solution Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 239000010902 straw Substances 0.000 claims description 8
- 239000003431 cross linking reagent Substances 0.000 claims description 7
- 239000003999 initiator Substances 0.000 claims description 7
- 238000006011 modification reaction Methods 0.000 claims description 7
- 241000209140 Triticum Species 0.000 claims description 5
- 235000021307 Triticum Nutrition 0.000 claims description 5
- 239000000654 additive Substances 0.000 abstract description 19
- 238000005553 drilling Methods 0.000 abstract description 11
- 239000012530 fluid Substances 0.000 abstract description 7
- 238000006116 polymerization reaction Methods 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 239000000178 monomer Substances 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 description 17
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 16
- 230000000996 additive effect Effects 0.000 description 12
- 239000013505 freshwater Substances 0.000 description 9
- 239000012670 alkaline solution Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 108090000790 Enzymes Proteins 0.000 description 3
- 102000004190 Enzymes Human genes 0.000 description 3
- 108010029541 Laccase Proteins 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 108010041969 feruloyl esterase Proteins 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- ODLMAHJVESYWTB-UHFFFAOYSA-N propylbenzene Chemical compound CCCC1=CC=CC=C1 ODLMAHJVESYWTB-UHFFFAOYSA-N 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 150000003384 small molecules Chemical class 0.000 description 2
- MNCGMVDMOKPCSQ-UHFFFAOYSA-M sodium;2-phenylethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 MNCGMVDMOKPCSQ-UHFFFAOYSA-M 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical class O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002605 large molecules Chemical class 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 235000018553 tannin Nutrition 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
Classifications
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- 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
- C08F289/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided for in groups C08F251/00 - C08F287/00
-
- 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
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/34—Lubricant additives
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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)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
The invention relates to the technical field of filtrate reducer, in particular to a high-temperature-resistant salt-resistant anti-collapse filtrate reducer and a preparation method thereof. The lignin degraded by the immobilized feruloyl esterase has small molecular weight, increased active sites, easy reaction of other monomers, good solubility of the compound obtained by polymerization, good compatibility with other drilling fluid additives, high temperature resistance, salt resistance and remarkable anti-sloughing performance.
Description
Technical Field
The invention belongs to the technical field of filtrate reducer, and particularly relates to a high-temperature-resistant, salt-resistant and anti-collapse filtrate reducer and a preparation method thereof.
Background
The fluid loss additive is an additive which can ensure the stable performance of drilling fluid, reduce the filtration loss of harmful liquid to geological layers, improve the stability of well walls and ensure the regular caliber of an oil well. The use of the filtrate reducer can effectively ensure the safe production of the oil field. With the continuous increase of the exploitation amount and the continuous improvement of the exploration technology, more and more deep wells and ultra-deep wells appear, which puts forward more and higher requirements on drilling fluid and various additives used for the drilling fluid, such as a filtrate reducer, such as continuous high temperature resistance and salt resistance. In order to ensure that the well drilling is carried out smoothly, the stability of the well wall is also a very main influence factor in the well drilling process, so that higher requirements on the anti-collapse performance are also provided.
At present, natural polymer materials commonly used in oil exploitation are widely used as fluid loss additives such as tannin, starch, lignin, cellulose and the like due to wide sources and low price. Wherein the lignin is a three-dimensional network phenolic compound highly crosslinked by a phenylpropane structural unit, is connected with each other by a C-C bond and an ether bond (beta-0-4, alpha-0-4, 4-O-5), has functional groups such as alcoholic hydroxyl group and phenolic hydroxyl group, and has a structure similar to that of the phenolic resin. The lignin has a complex structure, and compared with other biomass macromolecules, the lignin has no regular molecular structure, and the complex molecular structure and different reaction characteristics of the lignin bring difficulties to large-scale application in the field of chemical synthesis. The lignin is a high molecular polymer, has large molecular weight and low activity, is directly used for modification, has less chemical reaction active sites, so that the modification reaction yield is low, and the modified product has certain high temperature resistance, but has poor rheological performance due to overlarge molecular structure, and has poor salt resistance and anti-collapse performance.
Disclosure of Invention
Aiming at the defects, the invention aims to provide a high-temperature-resistant salt-resistant anti-collapse filtrate reducer and a preparation method thereof. The degraded lignin has small molecular weight, increased active sites, easy reaction of other monomers, good solubility of the polymerized compound, good compatibility with other drilling fluid additives, and outstanding high temperature resistance, salt resistance and collapse resistance.
In order to solve the above problems and achieve the object of the present invention, the present invention provides the following technical solutions:
the high-temperature-resistant, salt-resistant and anti-collapse filtrate reducer is characterized by comprising the following raw materials: 5-8 parts of lignin degradation liquid, 12-18 parts of maleic anhydride, 7-13 parts of sodium p-styrene sulfonate, 5-10 parts of dimethyl diallyl ammonium chloride, a proper amount of alkaline solution, 0.04-0.17 part of Benzoyl Peroxide (BPO), 0.01-0.03 part of dicumyl peroxide (DCP) and 0.05-0.07 part of potassium persulfate through chemical reaction.
Further, the preparation method of the lignin degradation liquid comprises the following steps: taking field waste as a lignin source, carrying out superfine grinding, adding water for mixing, placing the mixed solution in an immobilized enzyme reactor, and carrying out enzymolysis by adopting immobilized feruloyl esterase to obtain lignin degradation solution; the field waste materials are as follows: one or more of corn stalk, wheat straw and corn cob.
Further, the immobilized feruloyl esterase is prepared from feruloyl esterase and an immobilized carrier Fe3O4 nano magnetic material.
Further, the addition amount of the immobilized feruloyl esterase is 4-8wt% of the dosage of the lignin raw material; the temperature of enzymolysis is 37-40 ℃; the reaction time is 3-4h.
The invention also provides a preparation method of the high-temperature-resistant, salt-resistant and anti-collapse fluid loss agent, which is characterized by comprising the following steps:
s1, weighing 5-8 parts by weight of lignin degradation liquid, 12-18 parts by weight of maleic anhydride, 7-13 parts by weight of sodium p-styrene sulfonate and 5-10 parts by weight of dimethyl diallyl ammonium chloride, adding 600-800 parts by weight of water, adding an alkaline agent to adjust the pH value of the solution to 8-9, and obtaining a mixture A for later use;
s2, weighing 0.04-0.17 part by weight of benzoyl peroxide and 0.01-0.03 part by weight of dicumyl peroxide as cross-linking agents to obtain a mixture B for later use;
s3, weighing 0.05-0.07 part by weight of potassium persulfate, adding water to prepare 0.5% solution serving as an initiator, and obtaining a mixture C for later use;
and S4, adding the mixture A, the mixture B and the mixture C prepared by the steps S1 to S3 into a reactor, fully stirring, and carrying out modification reaction at the temperature of 65-75 ℃ for 3-6h.
Further, the preparation method of the lignin degradation liquid comprises the following steps: taking field waste as a lignin source, carrying out superfine grinding, adding water for mixing, placing the mixed solution in an immobilized enzyme reactor, and carrying out enzymolysis by adopting immobilized feruloyl esterase to obtain lignin degradation solution; the field waste materials are as follows: one or more of corn stalk, wheat straw and corn cob.
Further, the immobilized feruloyl esterase is prepared from feruloyl esterase and an immobilized carrier Fe3O4 nano magnetic material.
Further, the addition amount of the immobilized feruloyl esterase is 4-8wt% of the dosage of the lignin raw material; the temperature of enzymolysis is 37-40 ℃; the reaction time is 3-4h.
Further, the mass ratio of the lignin degradation liquid to the maleic anhydride to the sodium p-styrene sulfonate to the dimethyldiallylammonium chloride is 1.5.
Further, the reaction temperature was 70 ℃ and the reaction time was 4.5 hours.
The invention provides a high temperature resistant, salt resistant and anti-collapse filtrate reducer and a preparation method thereof, wherein a lignin raw material is degraded by biological enzyme, the lignin with a macromolecular three-dimensional network structure can be hydrolyzed into small molecules, the three-dimensional network structure is broken, and then the small molecules, the large molecules, the maleic anhydride, sodium styrene sulfonate and dimethyl diallyl ammonium chloride are polymerized under the action of an initiator and a cross-linking agent to form a new macromolecular polymer, and the polymer enhances the high temperature resistant, salt resistant and anti-collapse performance of the polymer by asymmetric polymerization points and introduction of alpha-methyl.
Compared with the prior art, the invention has the following beneficial effects:
(1) The method creatively adopts the enzymolysis liquid after the degradation of the immobilized enzyme as the raw material of the polymerization reaction, and the immobilized enzyme is fixed by the carrier, so that the concentration of the enzyme during the catalytic degradation can be improved, the speed and the efficiency of the enzymolysis reaction can be improved, the recycling can be realized, and the method is a very environment-friendly degradation method.
(2) The ferulic acid esterase can hydrolyze ester bonds in a plant wood fiber structure, break a network structure formed by the ester bonds, break a three-dimensional network structure of lignin through an enzymolysis reaction, reduce molecular weight, and reconstruct a molecular structure through a polymerization reaction, so that molecular chains grow and are crosslinked to form a new network structure, thereby realizing the change of polymer performance.
(3) After polymerization, the molecules contain cationic groups, so that the polymer has good anti-collapse and clay hydration and dispersion inhibiting capabilities, can effectively control water loss and viscosity increase, improves the rheological property, the lubricating property and the anti-collapse performance of slurry, improves the performance in the aspects of temperature resistance and salt resistance, and has good compatibility.
Description of the preferred embodiment
The high-temperature-resistant, salt-resistant and anti-collapse filtrate reducer is characterized by comprising the following raw materials: 5-8 parts of lignin degradation liquid, 12-18 parts of maleic anhydride, 7-13 parts of sodium p-styrene sulfonate, 5-10 parts of dimethyl diallyl ammonium chloride, a proper amount of alkaline solution, 0.04-0.17 part of Benzoyl Peroxide (BPO), 0.01-0.03 part of dicumyl peroxide (DCP) and 0.05-0.07 part of potassium persulfate through chemical reaction.
Further, the preparation method of the lignin degradation liquid comprises the following steps: taking field waste as a lignin source, carrying out superfine grinding, adding water for mixing, placing the mixed solution in an immobilized enzyme reactor, and carrying out enzymolysis by adopting immobilized feruloyl esterase to obtain lignin degradation solution; the field waste materials are as follows: one or more of corn stalk, wheat straw and corn cob.
Further, the immobilized feruloyl esterase is prepared from feruloyl esterase and an immobilized carrier Fe3O4 nano magnetic material.
Further, the addition amount of the immobilized feruloyl esterase is 4-8wt% of the dosage of the lignin raw material; the temperature of enzymolysis is 37-40 ℃; the reaction time is 3-4h.
The invention also provides a preparation method of the high-temperature-resistant, salt-resistant and anti-collapse fluid loss agent, which is characterized by comprising the following steps:
s1, weighing 5-8 parts by weight of lignin degradation liquid, 12-18 parts by weight of maleic anhydride, 7-13 parts by weight of sodium p-styrene sulfonate and 5-10 parts by weight of dimethyl diallyl ammonium chloride, adding 600-800 parts by weight of water, adding an alkaline agent to adjust the pH value of the solution to 8-9, and obtaining a mixture A for later use;
s2, weighing 0.04-0.17 part by weight of benzoyl peroxide and 0.01-0.03 part by weight of dicumyl peroxide as cross-linking agents to obtain a mixture B for later use;
s3, weighing 0.05-0.07 part by weight of potassium persulfate, adding water to prepare 0.5% solution serving as an initiator, and obtaining a mixture C for later use;
s4, adding the mixture A, the mixture B and the mixture C prepared in the steps S1 to S3 into a reactor, fully stirring, and carrying out modification reaction at 65-75 ℃ for 3-6h.
Further, the preparation method of the lignin degradation liquid comprises the following steps: taking field waste as a lignin source, carrying out superfine grinding, adding water for mixing, placing the mixed solution in an immobilized enzyme reactor, and carrying out enzymolysis by adopting immobilized feruloyl esterase to obtain lignin degradation solution; the field waste materials are as follows: one or more of corn stalk, wheat straw and corn cob.
Further, the immobilized feruloyl esterase is prepared from feruloyl esterase and an immobilized carrier Fe3O4 nano magnetic material.
Further, the addition amount of the immobilized feruloyl esterase is 4-8wt% of the dosage of the lignin raw material; the temperature of enzymolysis is 37-40 ℃; the reaction time is 3-4h.
Further, the mass ratio of the lignin degradation liquid to the maleic anhydride to the sodium p-styrene sulfonate to the dimethyldiallylammonium chloride is 1.5.
Further, the reaction temperature was 70 ℃ and the reaction time was 4.5 hours.
For the specific application as a fluid loss additive, the conventional means in the art can be used without particular requirements. And the special requirements on other components except the filtrate reducer in the high-temperature resistant drilling fluid are not made.
The high temperature resistant, salt resistant and anti-collapse fluid loss agent and the preparation method thereof provided by the present invention are described below with reference to the examples, but they should not be construed as limiting the scope of the present invention.
Example 1
A high-temperature-resistant, salt-resistant and anti-collapse filtrate reducer is prepared from the following raw materials: 6 parts of lignin degradation liquid, 15 parts of maleic anhydride, 9 parts of sodium p-styrene sulfonate, 6 parts of dimethyl diallyl ammonium chloride, a proper amount of alkaline solution, 0.1 part of Benzoyl Peroxide (BPO), 0.02 part of dicumyl peroxide (DCP) and 0.06 part of potassium persulfate by weight through chemical reaction.
The preparation method of the high-temperature-resistant, salt-resistant and anti-collapse filtrate reducer comprises the following specific steps:
s1, weighing the lignin degradation liquid, maleic anhydride, sodium p-styrene sulfonate and dimethyl diallyl ammonium chloride according to the using amount, adding 700 parts by weight of water, adding a proper amount of alkaline solution, and adjusting the pH value of the solution to 8 to obtain a mixture A for later use;
s2, weighing Benzoyl Peroxide (BPO) and dicumyl peroxide (DCP) as cross-linking agents to obtain a mixture B for later use;
s3, weighing potassium persulfate, adding water to prepare a solution with the mass fraction of 0.5% as an initiator, and obtaining a mixture C for later use;
and S4, adding the mixture A, the mixture B and the mixture C prepared in the S1-S3 into a reactor together, fully stirring, and carrying out modification reaction at the temperature of 70 ℃ for 4.5 hours.
The preparation method of the lignin degradation liquid comprises the following steps: taking corn straws as a lignin source, carrying out superfine grinding, adding water for mixing, placing the mixed solution in an immobilized enzyme reactor, and carrying out enzymolysis by adopting immobilized feruloyl esterase to obtain lignin degradation solution; the immobilized feruloyl esterase is prepared from feruloyl esterase and an immobilized carrier Fe3O4 nano magnetic material.
The addition amount of the immobilized feruloyl esterase is 5wt% of the dosage of the lignin raw material; the temperature of enzymolysis is 38 ℃; the reaction time was 3.5h.
Example 2
A high-temperature-resistant, salt-resistant and anti-collapse filtrate reducer is prepared from the following raw materials: 5 parts of lignin degradation liquid, 12 parts of maleic anhydride, 7 parts of sodium p-styrenesulfonate, 5 parts of dimethyl diallyl ammonium chloride, a proper amount of alkaline solution, 0.04 part of Benzoyl Peroxide (BPO), 0.01 part of dicumyl peroxide (DCP) and 0.05 part of potassium persulfate through chemical reaction.
The preparation method of the high-temperature-resistant, salt-resistant and anti-collapse filtrate reducer comprises the following specific steps:
s1, weighing the lignin degradation liquid, maleic anhydride, sodium p-styrene sulfonate and dimethyl diallyl ammonium chloride according to the using amount, adding 600 parts by weight of water, adding a proper amount of alkaline solution, and adjusting the pH value of the solution to 8 to obtain a mixture A for later use;
s2, weighing Benzoyl Peroxide (BPO) and dicumyl peroxide (DCP) as cross-linking agents to obtain a mixture B for later use;
s3, weighing potassium persulfate, adding water to prepare a solution with the mass fraction of 0.5% as an initiator, and obtaining a mixture C for later use;
and S4, adding the mixture A, the mixture B and the mixture C prepared in the S1-S3 into a reactor together, fully stirring, and carrying out modification reaction at 65 ℃ for 6h.
The preparation method of the lignin degradation liquid comprises the following steps: taking corn straws as a lignin source, carrying out superfine grinding, adding water for mixing, placing the mixed solution in an immobilized enzyme reactor, and carrying out enzymolysis by adopting immobilized feruloyl esterase to obtain lignin degradation solution; the immobilized feruloyl esterase is prepared from feruloyl esterase and an immobilized carrier Fe3O4 nano magnetic material.
The addition amount of the immobilized feruloyl esterase is 5wt% of the dosage of the lignin raw material; the temperature of enzymolysis is 38 ℃; the reaction time was 3.5h.
Example 3
A high-temperature-resistant, salt-resistant and anti-collapse filtrate reducer is prepared from the following raw materials: 8 parts of lignin degradation liquid, 18 parts of maleic anhydride, 13 parts of sodium p-styrene sulfonate, 10 parts of dimethyl diallyl ammonium chloride, a proper amount of alkaline solution, 0.17 part of Benzoyl Peroxide (BPO), 0.03 part of dicumyl peroxide (DCP) and 0.07 part of potassium persulfate by weight through chemical reaction.
The preparation method of the high-temperature-resistant, salt-resistant and anti-collapse filtrate reducer comprises the following specific steps:
s1, weighing the lignin degradation liquid, maleic anhydride, sodium styrene sulfonate and dimethyl diallyl ammonium chloride according to the using amount, adding 800 parts by weight of water, adding a proper amount of alkaline solution, and adjusting the pH value of the solution to 9 to obtain a mixture A for later use;
s2, weighing Benzoyl Peroxide (BPO) and dicumyl peroxide (DCP) as cross-linking agents to obtain a mixture B for later use;
s3, weighing potassium persulfate, adding water to prepare a solution with the mass fraction of 0.5% as an initiator, and obtaining a mixture C for later use;
and S4, adding the mixture A, the mixture B and the mixture C prepared from the S1-S3 into a reactor together, fully stirring, and carrying out modification reaction at the reaction temperature of 75 ℃ for 3h.
The preparation method of the lignin degradation liquid comprises the following steps: taking corn straws as a lignin source, carrying out superfine grinding, adding water for mixing, placing the mixed solution in an immobilized enzyme reactor, and carrying out enzymolysis by adopting immobilized feruloyl esterase to obtain lignin degradation solution; the immobilized feruloyl esterase is prepared from feruloyl esterase and an immobilized carrier Fe3O4 nano magnetic material.
The addition amount of the immobilized feruloyl esterase is 5wt% of the dosage of the lignin raw material; the temperature of enzymolysis is 38 ℃; the reaction time was 3.5h.
The performance test of the high-temperature-resistant, salt-resistant and anti-collapse filtrate reducer prepared by the invention comprises the following steps:
comparative example 1
Compared with example 1, the immobilized enzyme adopted in comparative example 1 is immobilized laccase, which is also a biological enzyme capable of degrading lignin, but the action principle is different from that of ferulic acid esterase. The immobilized laccase is prepared from laccase and an immobilized carrier Fe3O4 nano magnetic material. Other raw materials, amounts, steps and parameters were the same as those of example 1.
Comparative example 2 is a commercially available mature fluid loss additive SMP-I.
The experimental method comprises the following steps:
1. influence of addition amount on fluid loss reduction effect and salt resistance test
a. ) Preparing fresh water base slurry: 1000mL of distilled water is weighed, 42g of bentonite and 3g of anhydrous Na 2 CO 3 are added under continuous stirring, the mixture is stirred at a high speed for 2 hours, and the mixture is maintained in a sealed container for 24 hours.
b. ) Preparing saturated saline base slurry: and adding 36 mass percent of sodium chloride into the fresh water base slurry, stirring at a high speed for 30min, and maintaining in a sealing solution for 24h.
Respectively adding the fluid loss additive into the fresh water base slurry and the saturated salt water base slurry, and investigating the influence of different addition amounts of the two fluid loss additives on the rheological property and the fluid loss of the base slurry, wherein the addition amount is 0.5-3%.
Table 1 evaluation results of fluid loss additives in fresh water-based slurry with different additive amounts
Note: in Table 1, AV represents the apparent viscosity, PV represents the plastic viscosity, YP represents the dynamic shear force, and FLAPI represents the fluid loss.
Table 2 evaluation results of different amounts of fluid loss additives in saturated brine-based slurry
Note: in Table 2, AV represents the apparent viscosity, PV represents the plastic viscosity, YP represents the dynamic shear force, and FLAPI represents the fluid loss.
Analysis of the above experimental results shows that when the fluid loss additive prepared according to the present invention is added to the fresh water-based slurry and the saturated brine-based slurry, the viscosity increases with the addition amount, and the fluid loss decreases with the addition amount. When the addition amount of the fluid loss additive in the fresh water-based slurry is 1%, the fluid loss rate is 56.3%, and when the addition amount is 3%, the fluid loss rate can reach 81.5%; the addition amount of the fluid loss additive in the saturated base slurry is 2%, the fluid loss rate is 37.9%, and when the addition amount is 3%, the fluid loss rate is 76.6%. And the flowability and the fluid loss are obviously better than those of the commercially available SMP-I. The fluid loss additive prepared in the comparative example 1 has poor rheological property and poor fluid loss property. And the experimental result also shows that the filtrate reducer prepared by the invention has good salt resistance.
2. Temperature resistance test
As the influence of the addition amount on the fluid loss effect and the salt resistance test result show that the fluid loss agent prepared in the comparative example 1 has poor rheological property and fluid loss performance, the temperature resistance test does not test the fluid loss agent.
The rheological property and the filtration loss of the base slurry are tested by measuring 100mL of fresh water base slurry, adding the filtrate reducer into the fresh water base slurry according to the addition amount of 1wt%, and then rolling and aging the fresh water base slurry for 16 hours at 180-210 ℃.
TABLE 3 measurement results at different aging temperatures
Note: in Table 3, AV represents the apparent viscosity, PV represents the plastic viscosity, YP represents the dynamic shear force, and FLAPI represents the fluid loss.
Analysis of the experimental results shows that the fluid loss additive prepared by the invention has little change in rheological property and fluid loss property at a high temperature of 180-210 ℃, namely shows excellent high temperature resistance. The rheological properties of comparative example 2, although relatively excellent at high temperature, were drastically reduced in fluid loss properties with increasing temperature.
3. Collapse resistance test
A shale rolling recovery experiment is adopted to detect the inhibiting capability of the drilling fluid added with the fluid loss additive on the dispersibility of the shale, and the method can directly and quantitatively evaluate the dispersing tendency of the shale after the shale is fully expanded. According to a test method for physicochemical properties of shale (SY/T5613-2000), a roller heating furnace is adopted to carry out a shale rolling recovery rate test on the filtrate reducer prepared by the invention. The rock sample is made of drilling cuttings with the same grain size as the well section in the oil field, and the drilling cuttings are sieved by a 8-10-mesh sieve. After 4 groups of formulas with different addition amounts are subjected to hot rolling aging at 80 ℃ for 16h, pouring the treated materials into a 20-mesh material separating sieve for recycling and separation, then drying at 105 ℃ for 4h, cooling for 24h, and weighing.
TABLE 4 shale Rolling recovery Experimental results
The experimental result is analyzed, the rolling recovery rate of the shale is increased along with the increase of the addition amount, when the addition amount is 2.0%, the rolling recovery rate of the shale can be improved to 83.5% from 22.5% of a white control group when only distilled water is used, and the result shows that the filtrate reducer prepared by the invention has good anti-collapse effect.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, and the scope of the present invention is defined by the appended claims, and all changes that come within the meaning and range of equivalency of the specification are therefore intended to be embraced therein.
Claims (5)
1. The high-temperature-resistant, salt-resistant and anti-collapse filtrate reducer is characterized by comprising the following raw materials: 5-8 parts of lignin degradation liquid, 12-18 parts of maleic anhydride, 7-13 parts of sodium p-styrene sulfonate, 5-10 parts of dimethyl diallyl ammonium chloride, 0.04-0.17 part of benzoyl peroxide, 0.01-0.03 part of dicumyl peroxide and 0.05-0.07 part of potassium persulfate by weight through chemical reaction; the preparation method of the lignin degradation liquid comprises the following steps: by field wasteAs a lignin source, carrying out superfine grinding, adding water for mixing, placing the mixed solution in an immobilized enzyme reactor, and carrying out enzymolysis by adopting immobilized feruloyl esterase to obtain a lignin degradation solution; the field waste materials are as follows: one or more of corn stalk, wheat straw and corncob; the immobilized feruloyl esterase is prepared from feruloyl esterase and an immobilized carrier Fe 3 O 4 And preparing the nano magnetic material.
2. The high temperature resistant, salt resistant and anti-sloughing fluid loss agent of claim 1, wherein: the addition amount of the immobilized feruloyl esterase is 4-8wt% of the dosage of the lignin raw material; the temperature of enzymolysis is 37-40 ℃; the reaction time is 3-4h.
3. The preparation method of the high-temperature-resistant, salt-resistant and anti-collapse fluid loss agent as claimed in claim 1, wherein the preparation method comprises the following steps:
s1, weighing 5-8 parts by weight of lignin degradation liquid, 12-18 parts by weight of maleic anhydride, 7-13 parts by weight of sodium p-styrene sulfonate and 5-10 parts by weight of dimethyl diallyl ammonium chloride, adding 600-800 parts by weight of water, adding an alkaline agent to adjust the pH value of the solution to 8-9, and obtaining a mixture A for later use;
s2, weighing 0.04-0.17 part by weight of benzoyl peroxide and 0.01-0.03 part by weight of dicumyl peroxide as cross-linking agents to obtain a mixture B for later use;
s3, weighing 0.05-0.07 part by weight of potassium persulfate, adding water to prepare 0.5% solution serving as an initiator, and obtaining a mixture C for later use;
s4, adding the mixture A, the mixture B and the mixture C prepared in the steps S1 to S3 into a reactor, fully stirring, and carrying out modification reaction at 65-75 ℃ for 3-6h.
4. The preparation method of the high-temperature-resistant, salt-resistant and anti-collapse fluid loss agent as claimed in claim 3, wherein the preparation method comprises the following steps: the mass ratio of the lignin degradation liquid to the maleic anhydride to the sodium p-styrene sulfonate to the dimethyl diallyl ammonium chloride is 1.
5. The preparation method of the high-temperature-resistant, salt-resistant and anti-collapse fluid loss agent as claimed in claim 4, wherein the preparation method comprises the following steps: the reaction temperature in S4 is 70 ℃, and the reaction time is 4.5h.
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