CN114907823A - High-temperature-resistant shear-promoting agent for oil-based drilling fluid, preparation method and compound shear-promoting agent - Google Patents
High-temperature-resistant shear-promoting agent for oil-based drilling fluid, preparation method and compound shear-promoting agent Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 80
- 239000012530 fluid Substances 0.000 title claims abstract description 73
- 150000001875 compounds Chemical class 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 47
- 239000002253 acid Substances 0.000 claims abstract description 37
- 239000000440 bentonite Substances 0.000 claims abstract description 30
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 30
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229920000768 polyamine Polymers 0.000 claims abstract description 17
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims description 32
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000008367 deionised water Substances 0.000 claims description 12
- 229910021641 deionized water Inorganic materials 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 239000002244 precipitate Substances 0.000 claims description 12
- 239000000725 suspension Substances 0.000 claims description 12
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 11
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 10
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- OYHQOLUKZRVURQ-HZJYTTRNSA-N Linoleic acid Chemical compound CCCCC\C=C/C\C=C/CCCCCCCC(O)=O OYHQOLUKZRVURQ-HZJYTTRNSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 235000020778 linoleic acid Nutrition 0.000 claims description 6
- OYHQOLUKZRVURQ-IXWMQOLASA-N linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 claims description 6
- 239000000047 product Substances 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- 238000002390 rotary evaporation Methods 0.000 claims description 6
- 239000011265 semifinished product Substances 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000005119 centrifugation Methods 0.000 claims description 4
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 3
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 3
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 3
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 claims description 3
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 3
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000005642 Oleic acid Substances 0.000 claims description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 3
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 3
- 235000019387 fatty acid methyl ester Nutrition 0.000 claims description 3
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 3
- 235000021313 oleic acid Nutrition 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 3
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 3
- 239000004711 α-olefin Substances 0.000 claims description 3
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 238000010008 shearing Methods 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 12
- 230000001965 increasing effect Effects 0.000 description 11
- 239000003995 emulsifying agent Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 239000002283 diesel fuel Substances 0.000 description 7
- 230000032683 aging Effects 0.000 description 6
- 239000012267 brine Substances 0.000 description 6
- 239000000292 calcium oxide Substances 0.000 description 6
- 235000012255 calcium oxide Nutrition 0.000 description 6
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 6
- 239000004033 plastic Substances 0.000 description 5
- 239000011575 calcium Substances 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000010428 baryte Substances 0.000 description 2
- 229910052601 baryte Inorganic materials 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- DAJSVUQLFFJUSX-UHFFFAOYSA-M sodium;dodecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCS([O-])(=O)=O DAJSVUQLFFJUSX-UHFFFAOYSA-M 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 150000001408 amides Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000009918 complex formation Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
-
- 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
- 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
-
- 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
- C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based
- C09K8/34—Organic liquids
-
- 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
- Y02P20/141—Feedstock
Abstract
The invention provides a high-temperature-resistant shear-promoting agent for oil-based drilling fluid, a preparation method and a compound shear-promoting agent, aiming at solving the problem that the effect of organic bentonite as a shear-promoting agent in the prior art is poor. The high-temperature resistant stripping agent comprises the following raw materials of C12-C24 alkyl saturated acid, C12-C24 alkyl unsaturated acid and polyamine, wherein the molar ratio of the C12-C24 alkyl saturated acid to the C12-C24 alkyl unsaturated acid to the polyamine is 0.8-1: 1: 0.8 to 1.2. The compound shear strength improving agent comprises the high-temperature resistant shear strength improving agent for the oil-based drilling fluid and modified organic bentonite, wherein the mass ratio of the high-temperature resistant shear strength improving agent to the modified organic bentonite is 1: 1 to 3. The high-temperature-resistant shear strength improver and the compound shear strength improver have strong tackifying and shearing functions, can form a stable network structure in an oil-based drilling fluid system, and can meet the requirements of the shear strength improver for the oil-based drilling fluid.
Description
Technical Field
The invention relates to the field of drilling fluid, in particular to a high-temperature-resistant shear strength improving agent for oil-based drilling fluid, a preparation method and a compound shear strength improving agent.
Background
With the continuous and deep development of oil and gas resources, the oil-based drilling fluid is widely applied to the drilling process of various complex formations due to the excellent inhibitive performance, lubricity and self-stability of the oil-based drilling fluid. However, in the drilling process of most horizontal wells and shale gas wells, the shear force is one of important parameters for controlling the rheological property, the filtration loss property and other stability of the oil-based drilling fluid, and is also an important index for influencing key parameters such as the underground rock carrying effect, the well cleaning, the barite sedimentation stability, the suction pressure and the like. The oil-based drilling fluid has insufficient shearing force, the stability of the drilling fluid can be damaged, and the poor rock carrying capacity is generated, so that the situations of rock debris bed occurrence, drill sticking and the like can be caused, and therefore, complex wells such as various deep wells, high-temperature and high-pressure wells, horizontal wells and the like can be successfully drilled only by stably controlling the shearing force. In recent years, organobentonite is mainly selected as a commonly used tackifying and cutting-improving agent in China, but the organobentonite is easy to thicken obviously under a high-temperature condition, influences the rheological property of the oil-based drilling fluid, is easy to induce well leakage risks, is difficult to pull out and the like.
Disclosure of Invention
The invention provides a high-temperature-resistant shear-promoting agent for oil-based drilling fluid, a preparation method and a compound shear-promoting agent, aiming at solving the problem that the effect of organic bentonite as a shear-promoting agent in the prior art is poor. The high-temperature-resistant shear strength improver and the compound shear strength improver have strong tackifying and shearing functions, can form a stable network structure in an oil-based drilling fluid system, and can meet the requirements of the shear strength improver for the oil-based drilling fluid.
The technical scheme adopted by the invention is as follows:
the high-temperature-resistant shear strength improver for the oil-based drilling fluid comprises the following raw materials of C12-C24 alkyl saturated acid, C12-C24 alkyl unsaturated acid and polyamine, wherein the molar ratio of the C12-C24 alkyl saturated acid to the C12-C24 alkyl unsaturated acid to the polyamine is 0.8-1: 1: 0.8 to 1.2.
Further, the C12-C24 alkyl saturated acid is one or more of dodecyl acid, octadecyl acid and docodecyl acid.
Further, the C12-C24 alkyl unsaturated acid is one or more of oleic acid, linoleic acid and linoleic acid.
Further, the polyamine is one or more of ethylenediamine and triethylamine.
The method for preparing the high-temperature-resistant shear-promoting agent for the oil-based drilling fluid comprises the following steps:
step S1, adding C12-C24 alkyl saturated acid and C12-C24 alkyl unsaturated acid into a reactor, starting stirring, introducing nitrogen for protection, and then starting heating;
step S2, heating to 120-130 ℃, and then dripping polyamine;
step S3, after the polyamine is dripped, heating to 150-160 ℃, and preserving heat for 3-5 hours;
and step S4, cooling to obtain the high-temperature-resistant shear strength improving agent for the oil-based drilling fluid.
The compound shear strength improving agent comprises the high-temperature resistant shear strength improving agent for the oil-based drilling fluid and modified organic bentonite, wherein the mass ratio of the high-temperature resistant shear strength improving agent to the modified organic bentonite is 1: 1 to 3.
Further, the preparation process of the modified organic bentonite comprises the following steps:
step S1, adding deionized water and montmorillonite powder into a reactor, fully stirring to obtain a uniform dispersion liquid, adjusting the pH to 1.00-5.00, controlling the temperature to be 60-100 ℃, then adding inorganic salt into the reactor, wherein the amount of the inorganic salt accounts for 4-8% of the weight of the montmorillonite, fully reacting, and condensing and refluxing for 1-4 hours to obtain a uniform suspension liquid;
step S2, removing the solvent in the suspension obtained in the step S1 by adopting a centrifugal, filtering or rotary evaporation method to obtain a precipitate, washing the precipitate for multiple times by using deionized water and ethanol, and drying, grinding and sieving the obtained product to obtain a semi-finished product;
step S3, adding the semi-finished product obtained in the step S2 into deionized water, fully stirring to obtain uniform dispersion liquid, controlling the reaction temperature to be 60-100 ℃, then adding organic sulfonate into a reaction container, wherein the use amount of the organic sulfonate accounts for 4-8% of the weight of the montmorillonite, fully reacting, condensing and refluxing for 1-4 hours, and obtaining uniform suspension liquid;
and S4, removing the solvent in the suspension obtained in the step S3 by centrifugation, filtration or rotary evaporation to obtain a precipitate, washing the precipitate with deionized water and ethanol for multiple times, and drying, grinding and sieving the obtained product to obtain the modified organic bentonite.
Further, the inorganic salt includes Mg (NO) 3 ) 2 、Ca(NO 3 ) 2 、Fe(NO 3 ) 3 、MgCl 2 、CaCl 2 、FeCl 3 、ZnCl 2 、BiCl 3 、ZnSO 4 、CuSO 4 One or more of.
Further, the organic sulfonate comprises one or more of sodium dodecyl sulfonate, sodium dodecyl benzene sulfonate, alpha-olefin sulfonate and fatty acid methyl ester sulfonate.
The invention has the beneficial effects that:
1. the high-temperature-resistant shear strength improver for the oil-based drilling fluid, which is prepared by the invention, has a strong tackifying and shear strength improving effect in an oil-based drilling fluid system, can form a stable network structure in oil of the oil-based drilling fluid system, and can meet the requirements of the shear strength improver for the oil-based drilling fluid.
2. The high-temperature resistant shear strength improver for the oil-based drilling fluid, which is prepared by the invention, is compounded with the modified organic bentonite to obtain a compound shear strength improver, and the rheological property requirement of the drilling fluid can be met by a small addition amount in an oil-based drilling fluid system.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.
The high-temperature-resistant shear strength improver for the oil-based drilling fluid comprises the following raw materials of C12-C24 alkyl saturated acid, C12-C24 alkyl unsaturated acid and polyamine, wherein the molar ratio of the C12-C24 alkyl saturated acid to the C12-C24 alkyl unsaturated acid to the polyamine is 0.8-1: 1: 0.8 to 1.2.
Further, the C12-C24 alkyl saturated acid is one or more of dodecyl acid, octadecyl acid and docodecyl acid.
Further, the C12-C24 alkyl unsaturated acid is one or more of oleic acid, linoleic acid and linoleic acid.
Further, the polyamine is one or more of ethylenediamine and triethylamine.
The method for preparing the high-temperature-resistant shear-promoting agent for the oil-based drilling fluid comprises the following steps:
step S1, adding C12-C24 alkyl saturated acid and C12-C24 alkyl unsaturated acid into a reactor, starting stirring, introducing nitrogen for protection, and then starting heating;
step S2, heating to 120-130 ℃, and then dripping polyamine;
step S3, after the polyamine is dripped, heating to 150-160 ℃, and preserving heat for 3-5 hours;
and step S4, cooling to obtain the high-temperature-resistant cutting agent for the oil-based drilling fluid.
Examples 1-3 were prepared using the above method, with the compositions of examples 1-3 shown in table 1 below:
TABLE 1 compositions of examples 1-3
The high temperature resistant shear strength enhancing agents of examples 1-3 were placed in an oil-based drilling fluid system for evaluation, and the results are shown in tables 2 and 3 below.
The formula of the oil-based drilling fluid comprises the following components: 80% of 0# diesel oil, 3.0% of emulsifier, 0.5-1.5% of high-temperature resistant cutting agent, 3.0% of quicklime and 20.0% of CaCl 2 Saline (mass concentration: 25%).
The preparation process of the oil-based drilling fluid comprises the following steps: sequentially adding an emulsifier (HW Pmul-3) and 0# diesel oil into a high-stirring cup, stirring at 11000r/min while adding a high-temperature resistant shear-improving agent, stirring at high speed for 10min, adding quick lime, stirring at high speed for 15min, adding brine, stirring at high speed for 30min, aging at 150 ℃ in a roller heating furnace for 16h, taking out a water bath, cooling, stirring at 11000r/min for 10min, and testing the performance at 50 ℃. Wherein, the test 1 is added with the high temperature resistant shear promoting agent in the example 1, the test 2 is added with the high temperature resistant shear promoting agent in the example 2, and the test 3 is added with the high temperature resistant shear promoting agent in the example 3.
TABLE 2 influence of high temperature resistant shear enhancing agents of examples 1-3 on drilling fluid performance
TABLE 3 Effect of the high temperature resistant shear improvers of examples 1-3 on drilling fluid Performance
As can be seen from tables 2 and 3, the high temperature resistant shear strength improver (KS) in the present example has a very significant viscosity increasing shear strength improving effect, i.e., a good rheological property adjusting effect, as a flow pattern modifier for oil-based drilling fluids. The demulsification voltage basically keeps stable about 400 v, which shows that the system has good stability. Meanwhile, the change range of the apparent viscosity, the dynamic shear force and the plastic viscosity of the oil-based drilling fluid is small by changing the addition of the high-temperature resistant shear enhancing agent (KS). When the addition proportion of the high-temperature resistant shear-promoting agent (KS) is about 1 percent, the setting property of the oil-based drilling fluid system can meet the requirement of drilling operation, and the oil-based drilling fluid system can be applied to the drilling operation with wider filter capacity requirement and higher mechanical drilling speed requirement.
From the principle analysis, the high-temperature resistant shear strength improving agent (KS) synthesized in the embodiment is an amide polymer, the main chain is saturated, a proper number of side chains are contained, and the side chains have certain rigid groups. The high temperature resistant shear-enhancing agent (KS) has physical entanglement among molecules in an oil-based drilling fluid system, so that a network structure is formed in oil, namely the viscosity and the shear force of the oil are greatly increased. When the concentration value of molecular chains of the high-temperature resistant shear enhancing agent (KS) in oil is more than a certain value, the number of the molecular chains in a unit space is large enough, and the space distance between the molecular chains is reduced. If the distance between the molecular chains is reduced to a distance at which physical entanglement occurs, a phenomenon occurs in which the molecular chains of the high temperature resistant shear promoter physically entangle. Because the physical entanglement is a dynamic equilibrium process, the physical entanglement can be reduced or even eliminated as the oil is increased or the concentration of the high temperature resistant shear-enhancing agent (KS) is reduced, so that even though the concentration of the high temperature resistant shear-enhancing agent (KS) is increased continuously, the apparent viscosity and the plastic viscosity of the oil-based drilling fluid are increased, but the apparent viscosity and the plastic viscosity of the oil-based drilling fluid are increased by a smaller extent than those of the oil-based drilling fluid, namely, the apparent viscosity and the dynamic shear force of the drilling fluid are increased, and the plastic viscosity is not increased favorably.
The results of the evaluation of the temperature performance using the high temperature resistant shear improver of example 1 are shown in Table 4.
The formula of the oil-based drilling fluid comprises the following components: 80% of 0# diesel oil, 3.0% of emulsifier, 2.0% of high-temperature resistant cutting agent, 3.0% of quicklime and 20.0% of CaCl 2 Brine (concentration: 25.0%).
The preparation process of the oil-based drilling fluid comprises the following steps: sequentially adding emulsifier (HW Pmul-3), 0# diesel oil and high temperature resistant shear-promoting agent into a high stirring cup, stirring at 11000r/min for 10min, adding calcium lime, stirring at high speed for 10min, adding brine, and stirring at high speed for 30 min. Aging at 150 deg.C and 180 deg.C for 16h in a roller heating furnace, taking out, cooling in water bath, stirring at 11000r/min for 10min, and testing at 50 deg.C. The high temperature resistant shear strength improver in example 1 was added in tests 4 and 5 in different amounts.
TABLE 4 evaluation of drilling fluid properties at different temperatures for high temperature resistant shear strength additives
As can be seen from Table 4, the 2% addition of the high temperature resistant shear strength improver (KS) has a very obvious tackifying and shear strength improving effect as a flow pattern regulator of the oil-based drilling fluid, and the demulsification voltage basically keeps stable about 500 v, which indicates that the system has good stability. With the increasing aging temperature, the apparent viscosity, the dynamic shear force and the plastic viscosity of the modified polypropylene after aging are increased.
Based on the same inventive concept, the embodiment also provides a compound shear strength improving agent, which comprises the high-temperature resistant shear strength improving agent for the oil-based drilling fluid and modified organic bentonite, wherein the mass ratio of the high-temperature resistant shear strength improving agent to the modified organic bentonite is 1: 1 to 3.
Further, the preparation process of the modified organic bentonite comprises the following steps:
step S1, adding deionized water and montmorillonite powder into a reactor, fully stirring to obtain a uniform dispersion liquid, adjusting the pH to 1.00-5.00, controlling the temperature to be 60-100 ℃, then adding inorganic salt into the reactor, wherein the amount of the inorganic salt accounts for 4-8% of the weight of the montmorillonite, fully reacting, and condensing and refluxing for 1-4 hours to obtain a uniform suspension liquid;
step S2, removing the solvent in the suspension obtained in the step S1 by adopting a centrifugal, filtering or rotary evaporation method to obtain a precipitate, washing the precipitate for multiple times by using deionized water and ethanol, and drying, grinding and sieving the obtained product to obtain a semi-finished product;
step S3, adding the semi-finished product obtained in the step S2 into deionized water, fully stirring to obtain a uniform dispersion liquid, controlling the reaction temperature to be 60-100 ℃, then adding organic sulfonate into a reaction container, wherein the use amount of the organic sulfonate accounts for 4-8% of the weight of montmorillonite, fully reacting, and condensing and refluxing for 1-4 hours to obtain a uniform suspension liquid;
and S4, removing the solvent in the suspension obtained in the step S3 by centrifugation, filtration or rotary evaporation to obtain a precipitate, washing the precipitate with deionized water and ethanol for multiple times, and drying, grinding and sieving the obtained product to obtain the modified organic bentonite.
Further, the inorganic salt includes Mg (NO) 3 ) 2 、Ca(NO 3 ) 2 、Fe(NO 3 ) 3 、MgCl 2 、CaCl 2 、FeCl 3 、ZnCl 2 、BiCl 3 、ZnSO 4 、CuSO 4 One or more of.
Further, the organic sulfonate comprises one or more of sodium dodecyl sulfonate, sodium dodecyl benzene sulfonate, alpha-olefin sulfonate and fatty acid methyl ester sulfonate.
After the modified organic bentonite is modified twice, the long carbon chains carried by the modified organic bentonite are dissolved in oil, so that the organic bentonite is connected with the oil, and the organic bentonite has good gelling rate and tackifying and shearing effects in the oil-based drilling fluid. And secondly, due to the difference of the polarities of the inorganic salt, the organic sulfonate and the oil, the inorganic salt and the organic sulfonate are easy to mutually aggregate and are physically entangled to form a space network structure, so that the organic bentonite has better gelatinizing rate and tackifying and shear-promoting effects in the oil-based drilling fluid. Finally, oxygen atoms in sulfonic acid groups contained in the organic sulfonate and hydroxyl on the surface of the montmorillonite form hydrogen bonds, so that the surface acting force of the organic sulfonate and the montmorillonite is enhanced, an organic film with oleophylic chains facing outwards is formed, and the gelling rate of the organic bentonite is obviously improved by the organic film.
The prepared modified organobentonite was used in an oil-based drilling fluid system to evaluate its performance, and the results are shown in table 5 below.
The formula is as follows: 80% of 0# diesel oil, 3.0% of emulsifier, 3.0% of modified organic bentonite, 3.0% of quicklime and 20% of CaCl 2 Brine (concentration: 25%)
The preparation process of the oil-based drilling fluid comprises the following steps: sequentially adding an emulsifier and 0# diesel oil into a high-stirring cup, stirring at a high speed of 12000r/min while adding the modified organic bentonite, stirring at a high speed for 20min, adding quick lime, stirring at a high speed for 10min, adding brine, and stirring at a high speed for 30 min. Placing the mixture into a roller heating furnace, aging for 16h at 150 ℃, taking out the mixture to be cooled in a water bath, highly stirring for 10min at 12000r/min, and testing the performance at 50 ℃, wherein the results are as follows:
TABLE 5 non-aggravating Standard Experimental Properties of modified Organobentonite in oil-based drilling fluid System
The high temperature resistant shear strength improver and the modified organobentonite in example 1 were used to prepare a compounded shear strength improver, which was used in an oil-based drilling fluid system to evaluate the performance thereof, and the results are shown in table 6 below.
The oil-based drilling fluid comprises the following components in percentage by weight: 80% of 3# white oil, 0.8% of emulsifier, 1.8% of auxiliary emulsifier, 0.8% of wetting agent, 1.7-2.0% of compound cutting agent, 6.0% of filtrate loss reducer (Trol-101), 3.0% of quicklime, 20.0% of CaCl 2 Brine (concentration: 25.0%) + barite powder.
The preparation process of the oil-based drilling fluid comprises the following steps: sequentially adding emulsifier and 0# diesel oil into a high-stirring cup, stirring at 11000r/min for 10min, adding Trol-101, stirring for 10min, adding calcium lime, stirring for 15min, adding brineStirring at high temperature for 30min, adding barite (density of 4.25 g/cm) 3 ) Stirring for 30 min. Aging at 150 deg.C for 16h in a roller heating furnace, taking out, cooling in water bath, stirring at 11000r/min for 10min, and testing at 50 deg.C with the test results shown in Table 5.
TABLE 6 evaluation of Performance of built shear strength additives in oil-based drilling fluids
From table 6, it can be found that the rheological property of the oil-based drilling fluid system prepared by using the compound shear strength improver is lower than that of the oil-based drilling fluid system prepared by using the modified organic bentonite or the high-temperature resistant shear strength improver (KS) alone, for example, the combination of 1.2% of the modified organic bentonite, 0.5% of the high-temperature resistant shear strength improver (KS), 1.5% of the modified organic bentonite, 0.5% of the high-temperature resistant shear strength improver (KS), and the like can show that the modified organic bentonite and the high-temperature resistant shear strength improver (KS) have a certain synergistic effect in the oil-based drilling fluid system. Presumably, the organic sulfonate molecular chain and the temperature-resistant shear improver (KS) molecular chain in the modified organic bentonite are further physically intertwined in the oil phase of the white oil-based drilling fluid, so that the capability of the compound shear improver for forming a network structure in an oil-based drilling fluid system is improved, and the viscosity and the dynamic shear force are further increased to reduce the filtration loss. Meanwhile, the demulsification voltage of the system is over 1000V, which shows that the drilling fluid system is very stable, and the drilling fluid system can be applied to drilling operation with requirements on both the filtration loss and the mechanical drilling rate.
Claims (9)
1. The high-temperature-resistant shear strength improver for the oil-based drilling fluid is characterized by comprising C12-C24 alkyl saturated acid, C12-C24 alkyl unsaturated acid and polyamine, wherein the molar ratio of the C12-C24 alkyl saturated acid to the C12-C24 alkyl unsaturated acid to the polyamine is 0.8-1: 1: 0.8 to 1.2.
2. The high-temperature-resistant shear strength improver for the oil-based drilling fluid, according to claim 1, wherein the C12-C24 alkyl saturated acid is one or more of dodecyl acid, octadecyl acid and docodecyl acid.
3. The high-temperature-resistant shear improver for the oil-based drilling fluid, according to claim 1, wherein the C12-C24 alkyl unsaturated acid is one or more of oleic acid, linoleic acid and linoleic acid.
4. The high temperature resistant shear strength improver for oil-based drilling fluids according to claim 1, wherein the polyamine is one or more of ethylenediamine and triethylamine.
5. A method of preparing the high temperature resistant shear-promoting agent for oil-based drilling fluids according to any one of claims 1 to 4, comprising:
step S1, adding C12-C24 alkyl saturated acid and C12-C24 alkyl unsaturated acid into a reactor, starting stirring, introducing nitrogen for protection, and then starting heating;
step S2, heating to 120-130 ℃, and then dripping polyamine;
step S3, after the polyamine is dripped, heating to 150-160 ℃, and preserving heat for 3-5 hours;
and step S4, cooling to obtain the high-temperature-resistant shear strength improving agent for the oil-based drilling fluid.
6. The compound shear strength improving agent is characterized by comprising the high-temperature resistant shear strength improving agent for the oil-based drilling fluid and modified organic bentonite according to any one of claims 1 to 4; wherein the mass ratio of the high-temperature resistant shear-promoting agent to the modified organic bentonite is 1: 1 to 3.
7. The compound shear strength improver according to claim 6, wherein the preparation process of the modified organic bentonite comprises the following steps:
step S1, adding deionized water and montmorillonite powder into a reactor, fully stirring to obtain a uniform dispersion liquid, adjusting the pH to 1.00-5.00, controlling the temperature to be 60-100 ℃, then adding inorganic salt into the reactor, wherein the amount of the inorganic salt accounts for 4-8% of the weight of the montmorillonite, fully reacting, and condensing and refluxing for 1-4 hours to obtain a uniform suspension liquid;
step S2, removing the solvent in the suspension obtained in the step S1 by adopting a centrifugation, filtration or rotary evaporation method to obtain a precipitate, washing the precipitate with deionized water and ethanol for multiple times, drying, grinding and sieving the obtained product to obtain a semi-finished product;
step S3, adding the semi-finished product obtained in the step S2 into deionized water, fully stirring to obtain a uniform dispersion liquid, controlling the reaction temperature to be 60-100 ℃, then adding organic sulfonate into a reaction container, wherein the use amount of the organic sulfonate accounts for 4-8% of the weight of montmorillonite, fully reacting, and condensing and refluxing for 1-4 hours to obtain a uniform suspension liquid;
and S4, removing the solvent in the suspension obtained in the step S3 by centrifugation, filtration or rotary evaporation to obtain a precipitate, washing the precipitate with deionized water and ethanol for multiple times, and drying, grinding and sieving the obtained product to obtain the modified organic bentonite.
8. The built shear improver of claim 7, wherein the inorganic salt comprises Mg (NO) 3 ) 2 、Ca(NO 3 ) 2 、Fe(NO 3 ) 3 、MgCl 2 、CaCl 2 、FeCl 3 、ZnCl 2 、BiCl 3 、ZnSO 4 、CuSO 4 One or more of.
9. The compound shear improver of claim 7, wherein the organic sulfonate comprises one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, alpha-olefin sulfonate, and fatty acid methyl ester sulfonate.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103012180A (en) * | 2012-12-26 | 2013-04-03 | 中国石油集团渤海钻探工程有限公司 | Preparation method of organic rheology modifying agent for full-oil-based drilling fluid |
| CN103666414A (en) * | 2013-12-12 | 2014-03-26 | 中国石油集团渤海钻探工程有限公司 | Polyamide amine flowing modifier for mineral oil based drilling fluid and preparation method of modifier |
| CN105733316A (en) * | 2016-01-27 | 2016-07-06 | 北京理工大学 | Preparation method of organic acid salt intercalated modified montmorillonite |
| WO2019036286A1 (en) * | 2017-08-15 | 2019-02-21 | Saudi Arabian Oil Company | Oil-based drilling fluid compositions which include layered double hydroxides as rheology modifiers and amino amides as emulsifiers |
| US20190233709A1 (en) * | 2018-01-30 | 2019-08-01 | Ingevity South Carolina, Llc | High solids tolerant invert emulsion fluids |
| CN114436885A (en) * | 2020-11-03 | 2022-05-06 | 中石化石油工程技术服务有限公司 | Oil-based drilling fluid shear strength improving agent, preparation method thereof and high-density oil-based drilling fluid |
-
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- 2022-06-09 CN CN202210645022.8A patent/CN114907823A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103012180A (en) * | 2012-12-26 | 2013-04-03 | 中国石油集团渤海钻探工程有限公司 | Preparation method of organic rheology modifying agent for full-oil-based drilling fluid |
| CN103666414A (en) * | 2013-12-12 | 2014-03-26 | 中国石油集团渤海钻探工程有限公司 | Polyamide amine flowing modifier for mineral oil based drilling fluid and preparation method of modifier |
| CN105733316A (en) * | 2016-01-27 | 2016-07-06 | 北京理工大学 | Preparation method of organic acid salt intercalated modified montmorillonite |
| WO2019036286A1 (en) * | 2017-08-15 | 2019-02-21 | Saudi Arabian Oil Company | Oil-based drilling fluid compositions which include layered double hydroxides as rheology modifiers and amino amides as emulsifiers |
| US20190233709A1 (en) * | 2018-01-30 | 2019-08-01 | Ingevity South Carolina, Llc | High solids tolerant invert emulsion fluids |
| CN114436885A (en) * | 2020-11-03 | 2022-05-06 | 中石化石油工程技术服务有限公司 | Oil-based drilling fluid shear strength improving agent, preparation method thereof and high-density oil-based drilling fluid |
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