CN106947441B9 - Preparation method of wetting agent for oil-based drilling fluid and oil-based drilling fluid adopting wetting agent - Google Patents
Preparation method of wetting agent for oil-based drilling fluid and oil-based drilling fluid adopting wetting agent Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 54
- 239000012530 fluid Substances 0.000 title claims abstract description 49
- 239000000080 wetting agent Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title description 6
- 239000003921 oil Substances 0.000 claims abstract description 45
- 235000019198 oils Nutrition 0.000 claims abstract description 44
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 29
- 239000000194 fatty acid Substances 0.000 claims abstract description 29
- 229930195729 fatty acid Natural products 0.000 claims abstract description 29
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 238000003756 stirring Methods 0.000 claims abstract description 27
- 235000015112 vegetable and seed oil Nutrition 0.000 claims abstract description 24
- 239000008158 vegetable oil Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 15
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims abstract description 12
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 11
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims abstract description 11
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 10
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000001530 fumaric acid Substances 0.000 claims abstract description 10
- 238000010790 dilution Methods 0.000 claims abstract description 5
- 239000012895 dilution Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000003995 emulsifying agent Substances 0.000 claims description 20
- 239000002199 base oil Substances 0.000 claims description 10
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 9
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 9
- 229910052601 baryte Inorganic materials 0.000 claims description 9
- 239000010428 baryte Substances 0.000 claims description 9
- 239000001110 calcium chloride Substances 0.000 claims description 9
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 239000000706 filtrate Substances 0.000 claims description 9
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 8
- 239000000292 calcium oxide Substances 0.000 claims description 8
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 8
- 239000002689 soil Substances 0.000 claims description 8
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 239000011630 iodine Substances 0.000 claims description 6
- 229910052740 iodine Inorganic materials 0.000 claims description 6
- 235000021122 unsaturated fatty acids Nutrition 0.000 claims description 4
- 150000004670 unsaturated fatty acids Chemical class 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000005098 hot rolling Methods 0.000 abstract description 10
- 239000004033 plastic Substances 0.000 abstract description 7
- 238000011085 pressure filtration Methods 0.000 abstract description 4
- 239000008096 xylene Substances 0.000 abstract description 4
- 239000000839 emulsion Substances 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 10
- 235000020778 linoleic acid Nutrition 0.000 description 9
- OYHQOLUKZRVURQ-IXWMQOLASA-N linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 description 9
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 8
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 8
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 8
- OYHQOLUKZRVURQ-HZJYTTRNSA-N Linoleic acid Chemical compound CCCCC\C=C/C\C=C/CCCCCCCC(O)=O OYHQOLUKZRVURQ-HZJYTTRNSA-N 0.000 description 8
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 8
- 239000005642 Oleic acid Substances 0.000 description 8
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 7
- 239000007795 chemical reaction product Substances 0.000 description 6
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 239000002283 diesel fuel Substances 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- -1 fatty acid diamine Chemical class 0.000 description 3
- 238000005698 Diels-Alder reaction Methods 0.000 description 2
- 238000007259 addition reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002462 imidazolines Chemical class 0.000 description 2
- QISOBCMNUJQOJU-UHFFFAOYSA-N 4-bromo-1h-pyrazole-5-carboxylic acid Chemical compound OC(=O)C=1NN=CC=1Br QISOBCMNUJQOJU-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000007805 chemical reaction reactant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 125000002347 octyl 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])[H] 0.000 description 1
- 229940083254 peripheral vasodilators imidazoline derivative Drugs 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009736 wetting Methods 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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Lubricants (AREA)
Abstract
The application discloses a method for preparing a wetting agent for an oil-based drilling fluid, comprising the steps of: mixing and stirring vegetable oil fatty acid and maleic anhydride or fumaric acid or acrylic acid, heating to 200-220 ℃, reacting for 2-4 hours, and cooling to 130 ℃; adding diethylenetriamine, heating and dehydrating until no water is separated out at 260 ℃; adding vegetable oil fatty acid, wherein the adding amount is 1.1-1.25 times of the first adding weight, heating to 220 ℃, and separating water until no water is separated; cooling to 130 deg.C, adding xylene for dilution, adding 0.7 times of vegetable oil fatty acid, and stirring. The wetting agent provided by the invention has the advantages that the high-temperature and high-pressure filtration loss is 2.2-4.0 ml after the wetting agent is subjected to high temperature of 260 ℃ and hot rolling for 16 hours in an oil-based drilling fluid, the changes of the apparent viscosity and the plastic viscosity before and after the hot rolling are small, the rheological property is good, the plastic viscosity is low, the mechanical drilling speed is favorably improved, the emulsion stability is good after the hot rolling, and the emulsion breaking voltage is over 1000V.
Description
Technical Field
The invention relates to the field of petroleum exploration and development, in particular to the field of oil-based drilling fluid.
Background
With the increasing demand of the world for oil, gas and shale gas resources, the drilling technology of oil and gas is continuously developed. High-temperature or ultra-high-temperature drilling fluid matched with the high-temperature deep well, the ultra-deep well and the high-temperature shale gas well is required for drilling, but the current drilling fluid is difficult to meet the requirement.
Disclosure of Invention
In view of the shortcomings of the prior art, the present invention provides a method for preparing a wetting agent for an oil-based drilling fluid, comprising the steps of:
mixing and stirring vegetable oil fatty acid and maleic anhydride or fumaric acid or acrylic acid, heating to 200-220 ℃, reacting for 2-4 hours, and cooling to 130 ℃;
adding diethylenetriamine, heating and dehydrating until no water is separated out at 260 ℃;
adding vegetable oil fatty acid, wherein the adding amount is 1.1-1.25 times of the first adding weight, heating to 220 ℃, and separating water until no water is separated;
cooling to 130 deg.C, adding xylene for dilution, adding 0.7 times of vegetable oil fatty acid, and stirring.
In some embodiments of the invention, the vegetable oil fatty acids have an unsaturated fatty acid content of no less than 50%.
The invention also provides an oil-based drilling fluid which comprises the following components:
base oil, calcium chloride aqueous solution, organic soil, barite, a main emulsifier, an auxiliary emulsifier, a wetting agent, calcium oxide and a filtrate reducer; wherein the wetting agent is prepared according to the method described above.
In some embodiments of the present invention, the oil-based drilling fluid comprises the following components:
240-270 ml of base oil; 30-60 ml of 25% calcium chloride aqueous solution, 6.0-7.5g of organic soil, 660-666 g of barite, 4.5-5.4 g of primary emulsifier, 4.5-5.1 g of auxiliary emulsifier, 4.5-5.1 g of wetting agent, 6g of calcium oxide and 18g of filtrate reducer.
In some embodiments of the invention, the components in the oil-based drilling fluid can be adjusted, the adding amount of the barite is adjusted according to the required density, the oil-water ratio is adjusted according to the required oil-water ratio, the concentration of the calcium chloride is determined according to the formation activity, and the adding amount of other treating agents can be adjusted according to the rheological requirement.
In some embodiments of the invention, the base oil is white oil or diesel oil, the primary emulsifier is HY-MOMUL-HF, the secondary emulsifier is HY-MOCOAT-HF, and the fluid loss additive is HY-TROL.
In addition, the invention also provides a preparation method of the oil-based drilling fluid, which comprises the following steps:
measuring base oil (white oil or diesel oil), adding main emulsifier, auxiliary emulsifier and wetting agent, and stirring for 5 min;
adding 25% calcium chloride water solution, stirring for 15 min;
adding calcium oxide, organic soil and filtrate reducer, and stirring for 10 min;
adding barite, and stirring for 30 min;
wherein the high stirring speed is 12000 r/min
The wetting agent and the oil-based drilling fluid adopting the wetting agent have the high-temperature and high-pressure filtration loss of 2.2-4.0 ml after hot rolling at the high temperature of 260 ℃ for 16 hours, have small changes of apparent viscosity and plastic viscosity before and after hot rolling, good rheological property and low plastic viscosity, are beneficial to improving the mechanical drilling speed, and have the demulsification voltage of more than 1000V after hot rolling. The wetting agent provided by the invention has a wetting effect in the oil-based drilling fluid and also has a high-temperature stabilizing effect on the oil-based drilling fluid.
Detailed Description
The present invention will be described in further detail with reference to specific examples for the purpose of making the objects, technical solutions and advantages thereof clearer, however, it should be understood that the present invention may be embodied in various forms without being limited to the examples set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention provides an oil-based drilling fluid which comprises base oil, a 25% calcium chloride aqueous solution, organic soil, barite, a main emulsifier, an auxiliary emulsifier, a wetting agent, calcium oxide and a filtrate reducer.
Wherein the content of each component is as follows:
240-270 ml of base oil; 30-60 ml of 25% calcium chloride aqueous solution, 6.0-7.5g of organic soil, 660-666 g of barite, 4.5-5.4 g of primary emulsifier, 4.5-5.1 g of auxiliary emulsifier, 4.5-5.1 g of wetting agent, 6g of calcium oxide and 18g of filtrate reducer.
Wherein the base oil is white oil or diesel oil, the main emulsifier is HY-MOMUL-HF, the auxiliary emulsifier is HY-MOCOAT-HF, and the filtrate reducer is HY-TROL.
The wetting agent used in the present invention is a novel wetting agent, the components and the preparation method of which will be described in detail below, and for the sake of easy distinction, the novel wetting agent will be hereinafter referred to as SH-MOWET and the conventional wetting agent will be referred to as HY-MOWET.
Examples 1 to 4 and comparative examples 5 to 6 were prepared according to the ingredients shown in the following table:
the preparation method of the oil-based drilling fluid comprises the following steps:
(1) measuring base oil (white oil or diesel oil) with a measuring cylinder, pouring into a high-stirring cup, adding the main emulsifier, the auxiliary emulsifier and the wetting agent, and stirring for 5 min;
(2) adding 25% calcium chloride water solution, stirring for 15 min;
(3) adding calcium oxide, organic soil and filtrate reducer, and stirring for 10 min;
(4) adding barite, and stirring for 30 min.
The high stirring is carried out at 12000 r/min on a high-speed stirrer.
The oil-based drilling fluids prepared in examples 1 to 4 and comparative examples 5 to 6 were measured according to the following steps, and the following data were obtained:
(1) pouring the prepared oil-based drilling fluid into a measuring cup with a heating sleeve, heating to 66 ℃, and measuring the rheological property and the demulsification voltage of the drilling fluid at 66 ℃ (150 DEG F);
(2) pouring the measured oil-based drilling fluid into an aging tank and sealing;
(3) heating a roller heating furnace to 260 ℃, putting the aging tank into the roller heating furnace, and hot rolling for 16h at the temperature of 260 ℃;
(4) taking the aging tank out of the roller heating furnace, cooling, then pouring the oil-based drilling fluid into a high-stirring cup, and stirring at the rotating speed of 12000 r/min for 10 min;
(5) the rheology of oil-based drilling fluids was measured at 66 ℃ (150 ° f) and the fluid loss at high temperature and high pressure at 180 ℃ and the breaking voltage were measured.
Wherein, AV-the apparent viscosity of the drilling fluid, in mpa.s;
PV-the plastic viscosity of the drilling fluid, in mpa.s;
YP-yield value of drilling fluid, in pa;
GEL is the static shear force pa of the drilling fluid;
HTHP and FL are high-temperature and high-pressure filtration loss of the drilling fluid, and the unit ml is;
ES-breaking voltage of oil-based drilling fluids, unit v.
From the test data of examples 1-4 oil-based drilling fluids and comparative examples 5 and 6, the following conclusions can be drawn:
after the oil-based drilling fluid of the embodiments 1-4 is subjected to hot rolling at the high temperature of 260 ℃ for 16 hours, the high-temperature and high-pressure filtration loss is 2.2-4.0 ml, which is obviously superior to 45ml of the oil-based drilling fluid of the comparative example 5 and 38ml of the oil-based drilling fluid of the comparative example 6;
the oil-based drilling fluid of the embodiments 1 to 4 has small changes of apparent viscosity and plastic viscosity before and after hot rolling, good rheological property and low plastic viscosity, and is beneficial to improving the mechanical drilling speed;
the demulsification voltage of the oil-based drilling fluid of the embodiments 1-4 after hot rolling is over 1000V, and the emulsion stability of the oil-based drilling fluid is obviously superior to 428V and 420V of the comparative examples 5 and 6;
the properties of the oil-based drilling fluids of comparative examples 5 and 6 at normal temperature are basically equivalent to those of the oil-based drilling fluid provided by the invention, but the rheological properties of the oil-based drilling fluids are poor, the filtration loss is increased, and the demulsification voltage is obviously reduced after the oil-based drilling fluids are rolled at the high temperature of 260 ℃, which shows that some treating agents in the system are degraded after the oil-based drilling fluids without SH-MOWET as a wetting agent are rolled at the high temperature of 260 ℃.
Therefore, the oil-based drilling fluid system provided by the invention is more stable in high-temperature performance and can meet the requirements of site construction.
The wetting agents used in the present invention are quite complex mixtures, the reaction sequence and principle of which are roughly as follows:
1. vegetable oil fatty acid with unsaturated fatty acid content not less than 50% reacts with acrylic acid or fumaric acid or maleic anhydride at high temperature of 200-220 ℃ for 2-4 hours;
the main component of vegetable oil fatty acid is unsaturated fatty acid, and the main components are linoleic acid and oleic acid containing 18 carbon atoms, and the structural formula is as follows:
linoleic acid CH3(CH2)5-CH＝CH-CH＝CH-(CH2)7COOH；
Oleic acid CH3(CH2)7-CH＝CH-(CH2)7COOH。
Linoleic acid contains a conjugated double bond, and can perform Diels-Alder cyclic addition reaction with acrylic acid, fumaric acid and maleic anhydride (maleic anhydride) under the catalysis of a small amount of iodine. (note: without iodine catalysis, reaction temperature increased by 20 ℃)
Linoleic acid and acrylic acid to yield:
reaction of linoleic acid and fumaric acid to yield:
reaction of linoleic acid and maleic anhydride to yield:
oleic acid contains only one double bond and is not amenable to Diels-Alder reactions, but oleic acid undergoes addition reactions with carboxylic acids and anhydrides on carbon atoms adjacent to the double bond to form a variety of compounds, for example:
2. the reaction of the reaction product of the two and diethylenetriamine is carried out at 200-265 ℃, and the reaction product is a mixture of fatty acid amide, fatty acid diamine and unreacted fatty acid;
the reaction product of linoleic acid and acrylic acid or fumaric acid or maleic anhydride in vegetable oil fatty acid is reacted with diethylenetriamine to generate amide or imide:
oleic acid and fumaric acid with diethylenetriamine may form a mixture of amidoamines or imidazolines of the formula:
CH3(CH2)7CH＝CH-(CH2)7CONHCH2CH2NHCH2CH2NH2(g)
3. the mixture is further reacted with fatty acid at 200-220 deg.C to produce their derivatives.
The generated amidoamine or imidazoline reacts with oleic acid and linoleic acid in vegetable oil to generate amidoamine or imidazoline derivatives with more complex structures. Such as:
CH3(CH2)7CH＝CH(CH2)7CONHCH2CH2NHCH2CH2NHCO(CH2)7CH＝CH(CH2)7CH3(j)
when the initial reactants are linoleic acid and fumaric or acrylic acid, the results of their reaction with diethylenetriamine and then with fatty acids include:
when the initial reactants are oleic acid and maleic anhydride, their reaction with the diethylenetriamine reaction product and then with oleic acid in fatty acids may result in a reaction product of the following structure:
in conclusion, the final product is a mixture of a plurality of reaction products and reactants, has good high-temperature resistance and can be used as a high-temperature or ultrahigh-temperature wetting agent of the oil-based drilling fluid and a high-temperature stabilizer of the oil-based drilling fluid.
The preparation method of the wetting agent comprises the following steps:
mixing and stirring vegetable oil fatty acid and maleic anhydride or fumaric acid or acrylic acid, heating to 200-220 ℃, reacting for 2-4 hours, and cooling to 130 ℃;
adding diethylenetriamine, heating and dehydrating until no water is separated out at 260 ℃;
adding vegetable oil fatty acid, wherein the adding amount is 1.1-1.25 times of the first adding weight (namely W/W is 1.1-1.25), heating to 220 ℃, and separating water until no water is separated;
cooling to 130 deg.C, adding xylene for dilution, adding 0.7 times of vegetable oil fatty acid (i.e. V/W is 0.7), and stirring.
The wetting agent can be prepared according to the following specific method:
example 1:
adding 140g of vegetable oil fatty acid, 25g of maleic anhydride and a small amount of iodine into a three-mouth bottle provided with a thermometer, a condenser pipe and a dehydration device, starting stirring, heating the mixture to 200-220 ℃, reacting for 2-4 hours, cooling to 130 ℃, then adding 50g of diethylenetriamine, dehydrating the reactant after the temperature is above 160 ℃, heating and dehydrating until no water is separated out at 260 ℃, adding 176g of vegetable oil fatty acid, heating to 220 ℃, separating water until no water is separated out, cooling to 130 ℃, adding 100ml of xylene, uniformly stirring, and finishing the reaction.
Example 2:
adding 140g of vegetable oil fatty acid, 20g of fumaric acid and 0.3g of iodine into a three-mouth bottle provided with a thermometer, a condenser pipe and a dehydration device, starting stirring, heating the mixture to 200-220 ℃, reacting for 2-4 hours, cooling to 130 ℃, then adding 50g of diethylenetriamine, dehydrating the reactant after the temperature is over 160 ℃, adding 176g of vegetable oil fatty acid, heating to 220 ℃ until no water is separated out after heating and dehydrating to 260 ℃, and reacting until no water is separated out. Cooling to 130 ℃, adding 100ml of dimethylbenzene, and stirring uniformly to finish the reaction.
Example 3:
adding 140g of vegetable oil fatty acid, 20g of acrylic acid and 0.3g of iodine into a three-mouth bottle provided with a thermometer, a condenser pipe and a dehydration device, starting stirring, heating the mixture to 200-220 ℃, reacting for 2-4 hours, cooling to 130 ℃, then adding 50g of diethylenetriamine, reacting at a temperature above 160 ℃ to begin dehydration, heating to dehydrate to 260 ℃, adding 160g of vegetable oil fatty acid, heating to 220 ℃, and reacting until no water is separated out. And cooling to 140 ℃, adding 100ml of dimethylbenzene, and uniformly stirring to finish the reaction.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and are not limitative. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (3)
1. A method of making a wetting agent for an oil-based drilling fluid comprising the steps of:
mixing vegetable oil fatty acid, iodine and maleic anhydride or fumaric acid or acrylic acid, stirring, heating to 200-220 ℃, reacting for 2-4 hours, and cooling to 130 ℃;
adding diethylenetriamine, heating and dehydrating until no water is separated out at 260 ℃;
adding vegetable oil fatty acid, wherein the adding amount is 1.1-1.25 times of the first adding weight, heating to 220 ℃, and separating water until no water is separated;
cooling to 130 ℃, adding dimethylbenzene for dilution, adding the dimethylbenzene for dilution, wherein the adding volume of the dimethylbenzene is 0.7 times of the weight of the vegetable oil fatty acid added for the first time, and uniformly stirring, wherein the content of unsaturated fatty acid in the vegetable oil fatty acid is not lower than 50%.
2. The oil-based drilling fluid consists of the following components:
base oil, calcium chloride aqueous solution, organic soil, barite, a main emulsifier, an auxiliary emulsifier, a wetting agent, calcium oxide and a filtrate reducer;
wherein the wetting agent is prepared according to the method of claim 1.
3. The oil-based drilling fluid of claim 2 comprising the following components:
240-270 ml of base oil; 30-60 ml of 25% calcium chloride aqueous solution, 6.0-7.5g of organic soil, 660-666 g of barite, 4.5-5.4 g of primary emulsifier, 4.5-5.1 g of auxiliary emulsifier, 4.5-5.1 g of wetting agent, 6g of calcium oxide and 18g of filtrate reducer.
Priority Applications (1)
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| CN108276976B (en) * | 2017-12-28 | 2021-03-30 | 中国石油天然气集团公司 | Efficient oil-based drilling fluid emulsifier and preparation method thereof |
| CN109337659A (en) * | 2018-11-07 | 2019-02-15 | 北京石大胡杨石油科技发展有限公司 | A kind of oil resistant base drilling fluid and preparation method thereof |
| CN109796948A (en) * | 2018-12-07 | 2019-05-24 | 中石化石油工程技术服务有限公司 | A kind of preparation method of oil base drilling fluid inert diluent |
| CN110776883A (en) * | 2019-10-29 | 2020-02-11 | 中国海洋石油集团有限公司 | Emulsifier for oil-based drilling fluid |
| CN111848961B (en) * | 2020-07-20 | 2022-04-08 | 荆州市学成实业有限公司 | Preparation method of modified polyamide extreme pressure lubricant for high-efficiency drilling fluid |
| CN113969154B (en) * | 2020-07-22 | 2023-01-31 | 中国石油化工股份有限公司 | Emulsified cleaning liquid and preparation method and application thereof |
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Correction item: Denomination of Invention|Abstract|Claims|Description Correct: Preparation method of wetting agent for oil-based drilling fluid and oil-based drilling fluid using the wetting agent|Correct False: Preparation method of wetting agent for oil-based drilling fluid and oil-based drilling fluid using the wetting agent|error Number: 50-01 Page: full text Volume: 35 Correction item: Denomination of Invention|Abstract Correct: Preparation method of wetting agent for oil-based drilling fluid and oil-based drilling fluid using the wetting agent|Correct False: Preparation method of wetting agent for oil-based drilling fluid and oil-based drilling fluid using the wetting agent|error Number: 50-01 Volume: 35 |
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