CN114591719A - Filtrate reducer for oil-based drilling fluid - Google Patents
Filtrate reducer for oil-based drilling fluid Download PDFInfo
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- CN114591719A CN114591719A CN202210405033.9A CN202210405033A CN114591719A CN 114591719 A CN114591719 A CN 114591719A CN 202210405033 A CN202210405033 A CN 202210405033A CN 114591719 A CN114591719 A CN 114591719A
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- 238000005553 drilling Methods 0.000 title claims abstract description 46
- 239000012530 fluid Substances 0.000 title claims abstract description 40
- 239000000706 filtrate Substances 0.000 title abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 title abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 34
- 239000010426 asphalt Substances 0.000 claims abstract description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000654 additive Substances 0.000 claims abstract description 24
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 24
- 230000000996 additive effect Effects 0.000 claims abstract description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 13
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 8
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 24
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 21
- 229920000168 Microcrystalline cellulose Polymers 0.000 claims description 16
- 235000019813 microcrystalline cellulose Nutrition 0.000 claims description 16
- 239000008108 microcrystalline cellulose Substances 0.000 claims description 16
- 229940016286 microcrystalline cellulose Drugs 0.000 claims description 16
- KYNFOMQIXZUKRK-UHFFFAOYSA-N 2,2'-dithiodiethanol Chemical compound OCCSSCCO KYNFOMQIXZUKRK-UHFFFAOYSA-N 0.000 claims description 14
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 14
- 235000010980 cellulose Nutrition 0.000 claims description 14
- 229920002678 cellulose Polymers 0.000 claims description 14
- 239000001913 cellulose Substances 0.000 claims description 14
- 239000000178 monomer Substances 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 11
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000002390 rotary evaporation Methods 0.000 claims description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 8
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 claims description 8
- HFBMWMNUJJDEQZ-UHFFFAOYSA-N acryloyl chloride Chemical compound ClC(=O)C=C HFBMWMNUJJDEQZ-UHFFFAOYSA-N 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 7
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 6
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 5
- 239000002283 diesel fuel Substances 0.000 claims description 5
- IAZSXUOKBPGUMV-UHFFFAOYSA-N 1-butyl-3-methyl-1,2-dihydroimidazol-1-ium;chloride Chemical compound [Cl-].CCCC[NH+]1CN(C)C=C1 IAZSXUOKBPGUMV-UHFFFAOYSA-N 0.000 claims description 4
- IYFATESGLOUGBX-YVNJGZBMSA-N Sorbitan monopalmitate Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O IYFATESGLOUGBX-YVNJGZBMSA-N 0.000 claims description 4
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 4
- HVUMOYIDDBPOLL-XWVZOOPGSA-N Sorbitan monostearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O HVUMOYIDDBPOLL-XWVZOOPGSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 239000003208 petroleum Substances 0.000 abstract description 2
- 239000006185 dispersion Substances 0.000 abstract 1
- 239000002904 solvent Substances 0.000 description 16
- 238000007792 addition Methods 0.000 description 8
- 239000000047 product Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- FHDQNOXQSTVAIC-UHFFFAOYSA-M 1-butyl-3-methylimidazol-3-ium;chloride Chemical compound [Cl-].CCCCN1C=C[N+](C)=C1 FHDQNOXQSTVAIC-UHFFFAOYSA-M 0.000 description 3
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 3
- 229960001701 chloroform Drugs 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
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- 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
- 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
- C08F251/02—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof on to cellulose 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/08—Fiber-containing well treatment fluids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
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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)
- Macromonomer-Based Addition Polymer (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a filtrate reducer for an oil-based drilling fluid, belonging to the technical field of petroleum exploration and comprising the following raw materials in parts by weight: 120-130 parts of asphalt component and 20-30 parts of auxiliary agent; the asphalt component comprises 60-70 parts of oil phase, 10 parts of emulsifier and 50 parts of oxidized asphalt, under the protection of nitrogen, the emulsifier is added into the oil phase, the oxidized asphalt is added under the condition of 100-110 ℃, after stirring and dispersion, the auxiliary agent is added, and stirring is continued for 4-6 hours, so that the fluid loss additive for the oil-based drilling fluid is obtained. The invention selects the oxidized asphalt as the main raw material, has good high temperature resistance and oil solubility, has good fluid loss reduction effect, makes up the defect of single component by adding the auxiliary agent, can meet the requirement on the fluid loss of the oil-based drilling fluid in the drilling process, does not damage the stratum and can realize the protection effect on the oil layer.
Description
Technical Field
The invention belongs to the technical field of petroleum exploration, and particularly relates to a fluid loss additive for an oil-based drilling fluid.
Background
The filtrate reducer is a chemical additive which needs to be added in the oil field drilling fluid, and is also called a filtrate reducer and a filtrate reducer. During drilling, the invasion of the filtrate of the drilling fluid into the formation can cause hydration and expansion of shale, and in severe cases, the wellbore is unstable and various downhole complications are caused. The purpose of adding the fluid loss additive is to reduce the fluid loss of the drilling fluid as much as possible by forming a low-permeability, flexible, thin and compact filter cake on the well wall, and the fluid loss additive is an important drilling fluid treating agent for ensuring the stable performance of the drilling fluid, reducing the filtration loss of harmful liquid to a stratum, stabilizing the well wall and ensuring the well diameter regulation.
The addition of the filtrate reducer can obviously reduce the filtration loss of the drilling fluid, maintain and stabilize the well wall and ensure that the drilling is carried out quickly and safely. Along with the deeper and deeper drilling depth, the drilling bottom layer is more and more complex, and higher requirements are also put forward on the drilling fluid, so that the drilling fluid treating agent is required to have corresponding functions, and especially higher requirements are put forward on the aspects of temperature resistance and salt resistance; at present, among the most applied fluid loss additives, asphalt products have obvious thickening effect and are not beneficial to flow pattern control of oil-based drilling fluid.
Disclosure of Invention
In order to solve the technical problems mentioned in the background technology, the invention provides a fluid loss additive for an oil-based drilling fluid.
The purpose of the invention can be realized by the following technical scheme:
a fluid loss additive for oil-based drilling fluid comprises, by weight, 120-130 parts of asphalt component and 20-30 parts of auxiliary agent; the asphalt component comprises 60-70 parts of oil phase, 10 parts of emulsifier and 50 parts of oxidized asphalt;
further, the auxiliary agent is prepared by the following steps:
step S11, adding 2,2' -dithiodiethanol and triethylamine into tetrahydrofuran at the temperature of 0 ℃, then dropwise adding acryloyl chloride, stirring and reacting for 24 hours at the temperature of 20 ℃, removing the solvent by rotary evaporation after the reaction is finished, dissolving the solvent by trichloromethane, washing the solvent by 0.1mol/L potassium carbonate solution and deionized water in sequence, drying the solvent by anhydrous sodium sulfate, and removing the solvent by rotary evaporation to obtain a polymerizable monomer; the polymerizable monomer contains disulfide bonds, is introduced into the aid, and forms a blocking layer with integral gel property along with accumulation, extrusion and healing in the use process of the fluid loss additive, so that the pressure bearing capacity is improved, and the temperature resistance is better.
Step S12, under the condition of nitrogen protection, mixing microcrystalline cellulose and 1-butyl-3-methylimidazole chloride, adding potassium persulfate, stirring for 30min, adding a polymerizable monomer and glycidyl methacrylate, and continuing stirring for 3h after the addition is finished to obtain modified cellulose;
and step S13, mixing the modified cellulose and the amino-terminated branched substance, stirring for 5-6h at 30 ℃, and extracting the obtained product with acetone after the reaction is finished to obtain the auxiliary agent.
The microcrystalline cellulose is used as a reaction matrix, a polymerizable monomer and glycidyl methacrylate are used as reaction monomers, polymerization is carried out on the microcrystalline cellulose, then an amino-terminated branched compound is grafted, and the chain contains more branched short chains, so that oil molecules can be effectively bound, the hydrodynamic volume is small, the defect of asphalt fluid loss additives is overcome even if the chain is fully extended in an oil solution, the flow pattern regulation and control of the high-density oil-based drilling fluid are facilitated, and the advantage of the filtration-loss-reducing performance of cellulose products is fully exerted.
Further, in step S11, the molar ratio of the 2,2' -dithiodiethanol, triethylamine and acryloyl chloride is 1: 2.1: 2.1; tetrahydrofuran as a solvent;
in the step S12, the mass ratio of the microcrystalline cellulose to the 1-butyl-3-methylimidazolium chloride is 20: 1; the adding amount of the potassium persulfate is 3 percent of the mass of the microcrystalline cellulose; the mass ratio of the microcrystalline cellulose to the polymerizable monomer to the glycidyl methacrylate is 144: 3: 1.5;
in step S13, the ratio of the modified cellulose to the terminal amino group-branched substance is 100: 1.
further, the amino-terminated branched compound is prepared by the following steps:
under the conditions of 0 ℃ and nitrogen protection, mixing methyl acrylate and methanol, adding diethylenetriamine, stirring for 30min, heating to 30 ℃, continuing stirring for 4h, removing methanol by rotary evaporation, heating to 150 ℃, and keeping for 4h to obtain the terminal amino branching compound.
Further, the volume ratio of the diethylenetriamine to the methyl acrylate to the methanol is 52: 43: 100.
further, the oil phase is one of diesel oil and white oil.
Further, the emulsifier comprises one of span40 and span 60.
The fluid loss additive for the oil-based drilling fluid is prepared by the following steps:
adding an emulsifier into an oil phase under the protection of nitrogen, adding oxidized asphalt at the temperature of 110 ℃ below zero, stirring and dispersing, adding an auxiliary agent, and continuously stirring for 4-6h to obtain the fluid loss additive for the oil-based drilling fluid.
The invention has the beneficial effects that:
the invention selects the oxidized asphalt as the main raw material, has good high temperature resistance and oil solubility, has good fluid loss reduction effect, makes up the defect of single component by adding the auxiliary agent, can meet the requirement on the fluid loss of the oil-based drilling fluid in the drilling process, does not damage the stratum and can realize the protection effect on the oil layer. The added auxiliary agent makes up the defects of the asphalt filtrate reducer, is convenient for the flow pattern regulation and control of the high-density oil-based drilling fluid, and simultaneously gives full play to the advantages of the filtrate reduction performance of cellulose products.
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
Preparation of amino-terminated branchers:
under the conditions of 0 ℃ and nitrogen protection, mixing methyl acrylate and methanol, adding diethylenetriamine, stirring for 30min, heating to 30 ℃, continuing stirring for 4h, removing methanol by rotary evaporation, heating to 150 ℃, and keeping for 4h to obtain the terminal amino branching compound. The volume ratio of the diethylenetriamine to the methyl acrylate to the methanol is 52: 43: 100.
example 2
Preparing an auxiliary agent:
step S11, adding 2,2' -dithiodiethanol and triethylamine into tetrahydrofuran at the temperature of 0 ℃, then dropwise adding acryloyl chloride, stirring and reacting for 24 hours at the temperature of 20 ℃ after the addition is finished, removing a solvent by rotary evaporation after the reaction is finished, dissolving the solvent by trichloromethane, washing the solution by potassium carbonate solution and deionized water in 0.1mol/L in sequence, drying the solution by anhydrous sodium sulfate, and removing the solvent by rotary evaporation to obtain a polymerizable monomer; wherein the molar ratio of the 2,2' -dithiodiethanol to the triethylamine to the acryloyl chloride is 1: 2.1: 2.1; tetrahydrofuran as a solvent;
step S12, under the condition of nitrogen protection, mixing microcrystalline cellulose and 1-butyl-3-methylimidazole chloride, adding potassium persulfate, stirring for 30min, adding a polymerizable monomer and glycidyl methacrylate, and continuing stirring for 3h after the addition is finished to obtain modified cellulose; wherein the dosage mass ratio of the microcrystalline cellulose to the 1-butyl-3-methylimidazolium chloride is 20: 1; the addition amount of the potassium persulfate is 3 percent of the mass of the microcrystalline cellulose; the mass ratio of the microcrystalline cellulose to the polymerizable monomer to the glycidyl methacrylate is 144: 3: 1.5;
and step S13, mixing the modified cellulose and the amino-terminated branched substance prepared in the example 1, stirring for 5 hours at the temperature of 30 ℃, and extracting the obtained product with acetone after the reaction is finished to obtain the auxiliary agent. Wherein the dosage ratio of the modified cellulose to the amino-terminated branching compound is 100: 1.
example 3
Preparing an auxiliary agent:
step S11, adding 2,2' -dithiodiethanol and triethylamine into tetrahydrofuran at the temperature of 0 ℃, then dropwise adding acryloyl chloride, stirring and reacting for 24 hours at the temperature of 20 ℃, removing the solvent by rotary evaporation after the reaction is finished, dissolving the solvent by trichloromethane, washing the solvent by 0.1mol/L potassium carbonate solution and deionized water in sequence, drying the solvent by anhydrous sodium sulfate, and removing the solvent by rotary evaporation to obtain a polymerizable monomer; wherein the molar ratio of the 2,2' -dithiodiethanol to the triethylamine to the acryloyl chloride is 1: 2.1: 2.1; tetrahydrofuran as a solvent;
step S12, under the condition of nitrogen protection, mixing microcrystalline cellulose and 1-butyl-3-methylimidazole chloride, adding potassium persulfate, stirring for 30min, adding a polymerizable monomer and glycidyl methacrylate, and continuing stirring for 3h after the addition is finished to obtain modified cellulose; wherein the dosage mass ratio of the microcrystalline cellulose to the 1-butyl-3-methylimidazolium chloride is 20: 1; the addition amount of the potassium persulfate is 3 percent of the mass of the microcrystalline cellulose; the mass ratio of the microcrystalline cellulose to the polymerizable monomer to the glycidyl methacrylate is 144: 3: 1.5;
and step S13, mixing the modified cellulose and the amino-terminated branched substance prepared in the example 1, stirring for 6 hours at the temperature of 30 ℃, and extracting the obtained product with acetone after the reaction is finished to obtain the auxiliary agent. Wherein the dosage ratio of the modified cellulose to the amino-terminated branching compound is 100: 1.
example 4
Preparing a fluid loss additive for the oil-based drilling fluid:
adding span40 into diesel oil under the protection of nitrogen, adding oxidized asphalt at 100 ℃, stirring and dispersing, adding the auxiliary agent prepared in the example 3, and continuously stirring for 4 hours to obtain the filtrate reducer for the oil-based drilling fluid. The dosage of the raw materials is calculated by weight parts, 120 parts of asphalt component and 20 parts of auxiliary agent; the asphalt component comprises 60 parts of oil phase, 10 parts of emulsifier and 50 parts of oxidized asphalt;
example 5
Preparing a fluid loss additive for the oil-based drilling fluid:
adding span40 into diesel oil under the protection of nitrogen, adding oxidized asphalt at 105 ℃, stirring and dispersing, adding the auxiliary agent prepared in the example 3, and continuously stirring for 5 hours to obtain the filtrate reducer for the oil-based drilling fluid. The dosage of the raw materials is calculated by weight parts, 125 parts of asphalt component and 25 parts of auxiliary agent; the asphalt component comprises 65 parts of oil phase, 10 parts of emulsifier and 50 parts of oxidized asphalt;
example 6
Preparing a fluid loss additive for the oil-based drilling fluid:
adding span60 into white oil under the protection of nitrogen, adding oxidized asphalt at the temperature of 110 ℃, stirring and dispersing, adding the auxiliary agent prepared in the example 3, and continuously stirring for 6 hours to obtain the fluid loss additive for the oil-based drilling fluid. The dosage of the raw materials is calculated by weight parts, 130 parts of asphalt component and 30 parts of auxiliary agent; the asphalt component comprises 70 parts of oil phase, 10 parts of emulsifier and 50 parts of oxidized asphalt;
comparative example 1
The auxiliary agent in example 4 is changed into microcrystalline cellulose, and the rest raw materials and the preparation process are kept unchanged.
The samples prepared in examples 4-6 and comparative example 1 were tested according to GBT16783.2-2012 oil and gas industry drilling fluid field test part 2: the oil-based drilling fluid standard is that the performance of the full-oil-based drilling fluid and the full-oil-based drilling fluid added with 2% of the filtrate loss reducer prepared in the examples and the comparative examples are tested; heating for 16h at 100 ℃, and then measuring the comprehensive performance of each drilling fluid at 60 ℃.
The test results are shown in table 1 below:
TABLE 1
| Filtrate reducer | AV(mPa·s) | PV(mPa·s) | YP(Pa) | Fluid loss at 260 ℃ (mL) |
| Example 4 | 36 | 30 | 9 | 4.8 |
| Example 5 | 35 | 29 | 9 | 4.5 |
| Example 6 | 36 | 30 | 9 | 4.9 |
| Comparative example 1 | 47 | 40 | 13 | 20 |
From the above table 1, it can be seen that the fluid loss additive prepared by the invention has good fluid loss reducing effect, strong adaptability, good temperature resistance and strong adaptability, and can be used in both white oil-based and diesel oil-based systems.
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 (6)
1. The fluid loss additive for the oil-based drilling fluid is characterized by comprising the following raw materials in parts by weight: 120-130 parts of asphalt component and 20-30 parts of auxiliary agent; the asphalt component comprises 60-70 parts of oil phase, 10 parts of emulsifier and 50 parts of oxidized asphalt;
the auxiliary agent is prepared by the following steps:
mixing the modified cellulose and the amino-terminated branched substance, stirring for 5-6h at 30 ℃, and extracting the obtained product with acetone after the reaction is finished to obtain the auxiliary agent.
2. The fluid loss additive for oil-based drilling fluids according to claim 1, wherein the modified cellulose is prepared by the following steps:
step S11, adding 2,2' -dithiodiethanol and triethylamine into tetrahydrofuran at the temperature of 0 ℃, then dropwise adding acryloyl chloride, and stirring and reacting for 24 hours at the temperature of 20 ℃ after the addition to obtain a polymerizable monomer;
and step S12, under the condition of nitrogen protection, mixing microcrystalline cellulose and 1-butyl-3-methylimidazole chloride, adding potassium persulfate, stirring for 30min, adding a polymerizable monomer and glycidyl methacrylate, and continuing stirring for 3h after the addition is finished to obtain the modified cellulose.
3. The fluid loss additive for oil-based drilling fluids according to claim 1, wherein the amino-terminated branching compound is prepared by the following steps:
under the conditions of 0 ℃ and nitrogen protection, mixing methyl acrylate and methanol, adding diethylenetriamine, stirring for 30min, heating to 30 ℃, continuing stirring for 4h, removing methanol by rotary evaporation, heating to 150 ℃, and keeping for 4h to obtain the terminal amino branching compound.
4. The fluid loss additive for oil-based drilling fluids according to claim 1, wherein the oil phase is one of diesel oil and white oil.
5. The fluid loss additive for oil-based drilling fluids of claim 1, wherein the emulsifier comprises one of span40 and span 60.
6. The fluid loss additive for oil-based drilling fluids according to claim 1, prepared by the steps of:
adding an emulsifier into an oil phase under the protection of nitrogen, adding oxidized asphalt at the temperature of 110 ℃ below zero, stirring and dispersing, adding an auxiliary agent, and continuously stirring for 4-6h to obtain the fluid loss additive for the oil-based drilling fluid.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117757445A (en) * | 2024-02-22 | 2024-03-26 | 克拉玛依市义恩技术服务有限责任公司 | fluid loss additive for asphalt-based drilling fluid and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITVA20050074A1 (en) * | 2005-12-23 | 2007-06-24 | Lamberti Spa | FILTER REDUCER FOR DRILLING SLUDGE |
| CN108047104A (en) * | 2018-01-17 | 2018-05-18 | 北京化工大学 | A kind of preparation of polymerizable disulfide for reducing volume contraction and purposes |
| CN111876139A (en) * | 2020-08-06 | 2020-11-03 | 安徽陆海石油助剂科技有限公司 | Filtrate reducer oxidized asphalt for oil-based drilling fluid |
| CN112708403A (en) * | 2020-12-29 | 2021-04-27 | 扬州工业职业技术学院 | Petroleum drilling fluid and preparation method thereof |
| CN113214513A (en) * | 2021-04-26 | 2021-08-06 | 陕西科技大学 | Porous regenerated cellulose derivative and preparation method and application thereof |
-
2022
- 2022-04-18 CN CN202210405033.9A patent/CN114591719B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITVA20050074A1 (en) * | 2005-12-23 | 2007-06-24 | Lamberti Spa | FILTER REDUCER FOR DRILLING SLUDGE |
| CN108047104A (en) * | 2018-01-17 | 2018-05-18 | 北京化工大学 | A kind of preparation of polymerizable disulfide for reducing volume contraction and purposes |
| CN111876139A (en) * | 2020-08-06 | 2020-11-03 | 安徽陆海石油助剂科技有限公司 | Filtrate reducer oxidized asphalt for oil-based drilling fluid |
| CN112708403A (en) * | 2020-12-29 | 2021-04-27 | 扬州工业职业技术学院 | Petroleum drilling fluid and preparation method thereof |
| CN113214513A (en) * | 2021-04-26 | 2021-08-06 | 陕西科技大学 | Porous regenerated cellulose derivative and preparation method and application thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117757445A (en) * | 2024-02-22 | 2024-03-26 | 克拉玛依市义恩技术服务有限责任公司 | fluid loss additive for asphalt-based drilling fluid and preparation method thereof |
| CN117757445B (en) * | 2024-02-22 | 2024-04-30 | 克拉玛依市义恩技术服务有限责任公司 | Fluid loss additive for asphalt-based drilling fluid and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN114591719B (en) | 2023-03-31 |
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Denomination of invention: A filtrate reducer for oil-based drilling fluids Granted publication date: 20230331 Pledgee: Luan Branch of China Postal Savings Bank Co.,Ltd. Pledgor: ANHUI LUHAI PETROLEUM AUXILIARY TECHNOLOGY CO.,LTD. Registration number: Y2024980025436 |