CN110791262A - Lignin-derived non-foam drilling fluid viscosity reducer and preparation method thereof - Google Patents
Lignin-derived non-foam drilling fluid viscosity reducer and preparation method thereof Download PDFInfo
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- CN110791262A CN110791262A CN201911079633.5A CN201911079633A CN110791262A CN 110791262 A CN110791262 A CN 110791262A CN 201911079633 A CN201911079633 A CN 201911079633A CN 110791262 A CN110791262 A CN 110791262A
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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
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D307/87—Benzo [c] furans; Hydrogenated benzo [c] furans
Abstract
The invention relates to a lignin-derived non-foam drilling fluid viscosity reducer and a preparation method thereof. The method comprises the following steps: mixing the lignin material with water at normal temperature; adding tertiary amine, a quaternizing agent and water; mixing, and adding iodide into the mixed solution in the reaction container; evaporating the solvent of the mixture, and pulverizing. The obtained drilling fluid treating agent is nontoxic and easily degradable, has a strong viscosity reduction effect, and eliminates the foaming effect, so that the drilling fluid treating agent is more suitable for field application.
Description
Technical Field
The invention relates to the technical field of environment-friendly drilling fluid additives and application, in particular to a lignin-derived non-foam drilling fluid viscosity reducer.
Background
The quantity of petroleum resources which can be recovered in China is predicted to be 150 hundred million tons at present, and about 85 hundred million tons are discovered and proved to account for 57 percent of the proved degree of the petroleum resources which can be recovered. The part of petroleum resources to be explored are mainly distributed in Tarim, Quercoas, Chauda and Tuoha, and are main successive areas of the petroleum yield in China. Meanwhile, 73% of the resource amount is buried below 5000 meters. The method realizes breakthrough of oil gas in new areas, new fields and new stratums, particularly deep layers, finds and enlarges the range and the field of oil gas in oil fields, becomes a main means for smoothly realizing the goal of replacing China petroleum resources, and is the most important realization mode for the quick and large-scale development of the deep well ultra-deep well drilling technology. The deeper the wellbore, the higher the temperature in the wellbore during drilling. Because the clay particles in the drilling fluid are automatically dispersed under the high-temperature condition, the particle concentration is increased, the specific surface area is increased, and the problem of high-temperature thickening of the drilling fluid is more and more prominent. The viscosity reducer is one of indispensable drilling fluid treating agents in the drilling process and plays an important role in adjusting the rheological property of the drilling fluid.
The lignin is a phenolic compound existing in a plant body, is a natural environment-friendly material due to the characteristics of low price, degradability and no pollution to the environment, and is widely applied to drilling fluid. Iron-chromium lignosulfonate is a typical lignin viscosity reducer, and is prepared by oxidizing waste liquid of acid papermaking with potassium dichromate and adding ferrous sulfate for reaction. The iron-chromium lignosulfonate has good viscosity reduction and cutting effects on drilling fluid, strong salt and calcium resistance, wide raw material sources and low price, and the use temperature can reach about 170 ℃, but the iron-chromium lignosulfonate contains toxic metal chromium and is contrary to the requirement of environmental protection, so that the use of the iron-chromium lignosulfonate is limited at present, and researchers focus on researching and developing chromium-free lignin viscosity reducers or metal ion-free lignin viscosity reducers.
On the other hand, industrial lignin is a byproduct in the paper industry, and although the industrial lignin contains functional groups such as hydroxyl, carboxyl, sulfonic acid and the like, the industrial lignin has few coordination sites with transition metals, weak coordination capacity with clay and poor viscosity reduction effect. In order to strengthen the coordination of the industrial lignin, the cationic number of the lignin can be increased by reacting with a quaternizing agent, so that the anionic charge and interaction of the lignin and clay are improved, and the viscosity reduction effect is improved.
In addition, various drilling fluid additives derived from lignin materials have serious foaming in use, and a large amount of foam can cause the density of the drilling fluid to be reduced, the formation pressure cannot be balanced, and the risk of well kick and blowout exists. Meanwhile, the mud cake formed after the drilling fluid is filtered on the well wall is easily damaged by the large foam, so that the permeability of the mud cake is increased, the filter loss is increased, the drilling fluid loss is caused, and the possibility of the well wall being soaked, expanded and collapsed by water is increased. Therefore, in the development field of lignin-derived drilling fluid viscosity reducer, a foam-free additive suitable for field application can be developed only if the viscosity reducing effect is strengthened and the foaming effect is eliminated. The quaternized industrial lignin has enhanced water solubility, is supplemented with a cationic surfactant, and realizes the inhibition effect on the possible foam generation through the offset effect of the cationic surfactant on foaming.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a preparation method of an environment-friendly viscosity reducer for drilling fluid, and the obtained drilling fluid treating agent is a natural non-toxic product as a raw material, is easy to degrade, has a strong viscosity reducing effect, and eliminates the foaming effect, so that the drilling fluid treating agent is more suitable for field application.
In order to achieve the purpose, the invention adopts the technical scheme that:
a lignin-derived non-foaming drilling fluid viscosity reducer comprising the steps of:
firstly, mixing a lignin material and water with the mass of 2-10 times of that of the lignin material in a reaction container at normal temperature, and uniformly stirring, wherein the lignin material is alkali lignin with industrial grade and above purity, and the water is water with industrial grade and above purity;
secondly, adding tertiary amine and quaternizing agent with the mass ratio of 1-2:1 and water with the mass ratio of 5-20 times of the total mass of the tertiary amine and the quaternizing agent into another reaction vessel, uniformly stirring, reacting at 50-100 ℃ for 2-6 hours under stirring, and cooling to room temperature, wherein the tertiary amine is industrial grade or above trimethylamine, triethylamine, triethanolamine, dimethylethanolamine and a composition thereof, the quaternizing agent is industrial grade or above epichlorohydrin, 1, 2-dichloroethane, 1, 2-dibromoethane and a composition thereof, the water is industrial grade or above water, the lignin has a complex structure, the typical structure is as shown in the following formula, and the quaternizing reaction is as shown in the following formula, and 1, 2-dichloroethane and trimethylamine are taken as an example.
Thirdly, mixing the mixed liquor obtained in the first step and the mixed liquor obtained in the second step according to a ratio of 100-10:1, adding iodide accounting for 0.1-0.5% of the mixed liquor obtained in the second step into the mixed liquor obtained in the second step, uniformly stirring, reacting for 2-6 hours at 50-90 ℃, cooling to room temperature, adding foam inhibitor accounting for 0.5-5% of the lignin material, uniformly stirring, wherein the iodide is sodium iodide, potassium iodide and a composition thereof with industrial grade and above purity, the foam inhibitor is dodecyl pyridine, tetradecyl pyridine, hexadecyl pyridine, octadecyl pyridine, dodecyl pyridine bromide, tetradecyl pyridine, hexadecyl pyridine bromide, octadecyl pyridine bromide, dodecyl trimethyl ammonium chloride, tetradecyl trimethyl ammonium chloride, dodecyl trimethyl ammonium chloride and combinations thereof with industrial grade and above purity, Cetyl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, dodecyl trimethyl ammonium bromide, tetradecyl trimethyl ammonium bromide, cetyl trimethyl ammonium bromide, stearyl trimethyl ammonium bromide and combinations thereof;
and fourthly, evaporating the solvent of the mixture, and crushing to be below 40 meshes to obtain the lignin-derived environment-friendly viscosity reducer for the drilling fluid.
GB/T16783.1-2014 oil and gas industry drilling fluid field test part 1: water-based drilling fluid, SY-T5560 and 1992, evaluation procedure for defoamer for drilling fluid, were used to evaluate the viscosity of drilling fluid. When the dosage of the lignin-derived environment-friendly viscosity reducer for the drilling fluid is 0.3-3% of the drilling fluid, the viscosity of the water-based drilling fluid can be reduced by more than 30% at 30-180 ℃, and the drilling fluid does not foam during use.
The product introduces quaternary ammonium salt groups to strengthen the adsorption of the quaternary ammonium salt groups and clay in the drilling fluid, does not add heavy metal ions with environmental pollution as a foam inhibitor, and simultaneously uses the foam inhibitor to control foam generated when lignin products are used, thereby becoming a foam-free environment-friendly drilling fluid treating agent.
Examples
The invention is further illustrated by the following examples. It should be understood that the method described in the examples is only for illustrating the present invention and not for limiting the present invention, and that simple modifications of the preparation method of the present invention based on the concept of the present invention are within the scope of the claimed invention.
Example 1
Firstly, mixing a lignin material and 2 times of water by mass in a reaction container at normal temperature, and uniformly stirring, wherein the lignin material is industrial-grade alkali lignin, and the water is industrial-grade tap water;
secondly, adding tertiary amine and quaternizing agent with the mass ratio of 1:1 and water which is 5 times of the total mass of the tertiary amine and the quaternizing agent into another reaction vessel, uniformly stirring, reacting for 2 hours at 100 ℃ under stirring, and cooling to room temperature, wherein the tertiary amine is industrial-grade trimethylamine, the quaternizing agent is industrial-grade epichlorohydrin, and the water is industrial-grade tap water;
thirdly, mixing the mixed liquor obtained in the first step and the mixed liquor obtained in the second step according to a ratio of 100:1, adding an iodide accounting for 0.5% of the mass of the mixed liquor obtained in the second step into the mixed liquor in a reaction container, uniformly stirring, reacting at 90 ℃ for 2 hours, cooling to room temperature, adding a foam inhibitor accounting for 5% of the mass of the lignin material, and uniformly stirring, wherein the iodide is industrial-grade sodium iodide, and the foam inhibitor is industrial-grade cetylpyridinium chloride;
and fourthly, evaporating the solvent of the mixture, and crushing to be below 40 meshes to obtain the lignin-derived environment-friendly viscosity reducer for the drilling fluid.
Respectively weighing 5mg of the dry lignin-derived environment-friendly viscosity reducer for drilling fluid by using an analytical balance, placing the weighed viscosity reducer in a miniature aluminum crucible, adding a crucible cover, punching to prepare a sample to be detected, and placing the sample into a sample seat of a DSC analyzer for analysis. And (3) uniformly heating from 0-200 ℃ within 20 minutes by adopting nitrogen protection. The glass transition temperature was measured to be 161.5 ℃ higher than 155.0 ℃ for the lignin feedstock. Mixing the sample and KBr at a mass ratio of 1:100, grinding into fine powder, placing into a tabletting mold, and tabletting into a transparent filmAnd (3) placing the chip on a sample holder for testing, and carrying out full-wavelength scanning (400-4000 nm). At 3400cm-1The wide and strong absorption peak near the position is the stretching vibration of O-H, 2895-2920cm-1Absorption peaks at 1595cm are the stretching vibration of methyl and methylene C-H-1And 1420cm-1The absorption peak near the lignin is the skeleton vibration absorption of benzene ring, and is 2895-2920cm higher than that of the lignin raw material-1The absorption peak at (a) is significantly enhanced, indicating an increase in the number of alkyl groups in the enhanced component.
GB/T16783.1-2014 oil and gas industry drilling fluid field test part 1: water-based drilling fluid, SY-T5560 and 1992, evaluation procedure for defoamer for drilling fluid, were used to evaluate the viscosity of drilling fluid. When the dosage of the lignin-derived environment-friendly viscosity reducer for the drilling fluid is 0.3 percent of the drilling fluid, the viscosity of the water-based drilling fluid can be reduced by 33 percent at 30 ℃, and the drilling fluid does not foam in use.
Example 2
Firstly, mixing a lignin material and 3 times of water by mass in a reaction container at normal temperature, and uniformly stirring, wherein the lignin material is chemical soda ash lignin, and the water is distilled water;
secondly, adding tertiary amine and quaternizing agent with the mass ratio of 1.2:1 and water with the mass ratio of 8 times of the total mass of the tertiary amine and the quaternizing agent into another reaction vessel, uniformly stirring, reacting for 3 hours at 90 ℃ under stirring, and cooling to room temperature, wherein the tertiary amine is analytically pure triethylamine, the quaternizing agent is analytically pure 1, 2-dichloroethane, and the water is distilled water;
step three, mixing the mixed liquor obtained in the step one and the mixed liquor obtained in the step two according to a ratio of 80:1, adding iodide which is 0.3% of the mixed liquor obtained in the step two into the mixed liquor obtained in the step two, uniformly stirring, reacting at 80 ℃ for 2 hours, cooling to room temperature, adding foam inhibitor which is 3% of the lignin material by mass, uniformly stirring, wherein the iodide is analytically pure potassium iodide, and the foam inhibitor is analytically pure octadecyl pyridine bromide;
and fourthly, evaporating the solvent of the mixture, and crushing to be below 40 meshes to obtain the lignin-derived environment-friendly viscosity reducer for the drilling fluid.
Respectively weighing 5mg of the dry lignin-derived environment-friendly viscosity reducer for drilling fluid by using an analytical balance, placing the weighed viscosity reducer in a miniature aluminum crucible, adding a crucible cover, punching to prepare a sample to be detected, and placing the sample into a sample seat of a DSC analyzer for analysis. And (3) uniformly heating from 0-200 ℃ within 20 minutes by adopting nitrogen protection. The glass transition temperature was measured to be 162.0 ℃ higher than 155.0 ℃ for the lignin feedstock. Mixing a sample and KBr according to a mass ratio of 1:100, grinding into fine powder, placing the fine powder in a tabletting mold, pressing into a transparent sheet, placing the transparent sheet on a sample rack for testing, and carrying out full-wavelength scanning (400-4000 nm). At 3400cm-1The wide and strong absorption peak near the position is the stretching vibration of O-H, 2895-2920cm-1Absorption peaks at 1595cm are the stretching vibration of methyl and methylene C-H-1And 1420cm-1The absorption peak near the lignin is the skeleton vibration absorption of benzene ring, and is 2895-2920cm higher than that of the lignin raw material-1The absorption peak at (a) is significantly enhanced, indicating an increase in the number of alkyl groups in the enhanced component.
GB/T16783.1-2014 oil and gas industry drilling fluid field test part 1: water-based drilling fluid, SY-T5560 and 1992, evaluation procedure for defoamer for drilling fluid, were used to evaluate the viscosity of drilling fluid. When the dosage of the lignin-derived environment-friendly viscosity reducer for drilling fluid is 0.45 percent of the drilling fluid, the viscosity of the water-based drilling fluid can be reduced by 40 percent at 60 ℃, and the drilling fluid does not foam in use.
Example 3
Firstly, mixing a lignin material and 5 times of water by mass in a reaction container at normal temperature, and uniformly stirring, wherein the lignin material is chemical soda ash lignin, and the water is industrial-grade deionized water;
secondly, adding tertiary amine and quaternizing agent with the mass ratio of 2:1 and water with the mass ratio of 10 times of the total mass of the tertiary amine and the quaternizing agent into another reaction vessel, uniformly stirring, reacting for 4 hours at 70 ℃ under stirring, and cooling to room temperature, wherein the tertiary amine is chemically pure triethanolamine, the quaternizing agent is chemically pure 1, 2-dibromoethane, and the water is industrial-grade deionized water;
thirdly, mixing the mixed liquor obtained in the first step and the mixed liquor obtained in the second step according to a ratio of 50:1, adding an iodide accounting for 0.1% of the mass of the mixed liquor obtained in the second step into the mixed liquor in a reaction container, uniformly stirring, reacting at 60 ℃ for 5 hours, cooling to room temperature, adding a foam inhibitor accounting for 1% of the mass of the lignin material, uniformly stirring, wherein the iodide is chemically pure sodium iodide, and the foam inhibitor is dodecyl trimethyl ammonium chloride and octadecyl trimethyl ammonium chloride which are chemically pure in a mass ratio of 1: 2;
and fourthly, evaporating the solvent of the mixture, and crushing to be below 40 meshes to obtain the lignin-derived environment-friendly viscosity reducer for the drilling fluid.
Respectively weighing 5mg of the dry lignin-derived environment-friendly viscosity reducer for drilling fluid by using an analytical balance, placing the weighed viscosity reducer in a miniature aluminum crucible, adding a crucible cover, punching to prepare a sample to be detected, and placing the sample into a sample seat of a DSC analyzer for analysis. And (3) uniformly heating from 0-200 ℃ within 20 minutes by adopting nitrogen protection. The glass transition temperature was measured to be 161.6 ℃ higher than 155.0 ℃ for the lignin feedstock. Mixing a sample and KBr according to a mass ratio of 1:100, grinding into fine powder, placing the fine powder in a tabletting mold, pressing into a transparent sheet, placing the transparent sheet on a sample rack for testing, and carrying out full-wavelength scanning (400-4000 nm). At 3400cm-1The wide and strong absorption peak near the position is the stretching vibration of O-H, 2895-2920cm-1Absorption peaks at 1595cm are the stretching vibration of methyl and methylene C-H-1And 1420cm-1The absorption peak near the lignin is the skeleton vibration absorption of benzene ring, and is 2895-2920cm higher than that of the lignin raw material-1The absorption peak at (a) is significantly enhanced, indicating an increase in the number of alkyl groups in the enhanced component.
GB/T16783.1-2014 oil and gas industry drilling fluid field test part 1: water-based drilling fluid, SY-T5560 and 1992, evaluation procedure for defoamer for drilling fluid, were used to evaluate the viscosity of drilling fluid. When the dosage of the lignin-derived environment-friendly viscosity reducer for drilling fluid is 1.0 percent of the drilling fluid, the viscosity of the water-based drilling fluid can be reduced by 45 percent at 100 ℃, and the drilling fluid does not foam in use.
Example 4
Firstly, mixing a lignin material and 10 times of water by mass in a reaction container at normal temperature, and uniformly stirring, wherein the lignin material is industrial-grade alkali lignin, and the water is industrial-grade tap water;
secondly, adding tertiary amine and quaternizing agent with the mass ratio of 1.8:1 and water which is 20 times of the total mass of the tertiary amine and the quaternizing agent into another reaction vessel, uniformly stirring, reacting for 6 hours at 50 ℃ under stirring, and cooling to room temperature, wherein the tertiary amine is industrial-grade trimethylamine, the quaternizing agent is industrial-grade epichlorohydrin, and the water is industrial-grade tap water;
thirdly, mixing the mixed liquor obtained in the first step and the mixed liquor obtained in the second step according to a ratio of 100:1, adding an iodide accounting for 0.2% of the mass of the mixed liquor obtained in the second step into the mixed liquor in a reaction container, uniformly stirring, reacting at 50 ℃ for 6 hours, cooling to room temperature, adding a foam inhibitor accounting for 0.5% of the mass of the lignin material, and uniformly stirring, wherein the iodide is industrial-grade potassium iodide, and the foam inhibitor is industrial-grade hexadecyl trimethyl ammonium chloride;
and fourthly, evaporating the solvent of the mixture, and crushing to be below 40 meshes to obtain the lignin-derived environment-friendly viscosity reducer for the drilling fluid.
Respectively weighing 5mg of the dry lignin-derived environment-friendly viscosity reducer for drilling fluid by using an analytical balance, placing the weighed viscosity reducer in a miniature aluminum crucible, adding a crucible cover, punching to prepare a sample to be detected, and placing the sample into a sample seat of a DSC analyzer for analysis. And (3) uniformly heating from 0-200 ℃ within 20 minutes by adopting nitrogen protection. The glass transition temperature was measured to be 163.5 ℃ higher than 155.0 ℃ for the lignin feedstock. Mixing a sample and KBr according to a mass ratio of 1:100, grinding into fine powder, placing the fine powder in a tabletting mold, pressing into a transparent sheet, placing the transparent sheet on a sample rack for testing, and carrying out full-wavelength scanning (400-4000 nm). At 3400cm-1The wide and strong absorption peak near the position is the stretching vibration of O-H, 2895-2920cm-1Absorption peaks at 1595cm are the stretching vibration of methyl and methylene C-H-1And 1420cm-1The absorption peak near the lignin is the skeleton vibration absorption of benzene ring, and is 2895-2920cm higher than that of the lignin raw material-1The absorption peak at (a) is significantly enhanced, indicating an increase in the number of alkyl groups in the enhanced component.
GB/T16783.1-2014 oil and gas industry drilling fluid field test part 1: water-based drilling fluid, SY-T5560 and 1992, evaluation procedure for defoamer for drilling fluid, were used to evaluate the viscosity of drilling fluid. When the dosage of the lignin-derived environment-friendly viscosity reducer for the drilling fluid is 2.5 percent of the drilling fluid, the viscosity of the water-based drilling fluid can be reduced by 50 percent at 120 ℃, and the drilling fluid does not foam in use.
Example 5
Firstly, mixing a lignin material and 5 times of water by mass in a reaction container at normal temperature, and uniformly stirring, wherein the lignin material is industrial-grade alkali lignin, and the water is industrial-grade deionized water;
secondly, adding tertiary amine and quaternizing agent with the mass ratio of 1.2:1 and water which is 5 times of the total mass of the tertiary amine and the quaternizing agent into another reaction vessel, uniformly stirring, reacting for 2.5 hours at 90 ℃ under stirring, and cooling to room temperature, wherein the tertiary amine is industrial-grade dimethylethanolamine, the quaternizing agent is industrial-grade 1, 2-dibromoethane, and the water is industrial-grade deionized water;
thirdly, mixing the mixed liquor obtained in the first step and the mixed liquor obtained in the second step according to a ratio of 25:1, adding an iodide accounting for 0.3% of the mass of the mixed liquor obtained in the second step into the mixed liquor in a reaction container, uniformly stirring, reacting at 80 ℃ for 3 hours, cooling to room temperature, adding a foam inhibitor accounting for 2% of the mass of the lignin material, and uniformly stirring, wherein the iodide is a composition of sodium iodide and potassium iodide in an industrial-grade mass ratio of 1:2, and the foam inhibitor is industrial-grade octadecyl trimethyl ammonium bromide;
and fourthly, evaporating the solvent of the mixture, and crushing to be below 40 meshes to obtain the lignin-derived environment-friendly viscosity reducer for the drilling fluid.
Respectively weighing 5mg of the dry lignin-derived environment-friendly viscosity reducer for drilling fluid by using an analytical balance, placing the weighed viscosity reducer in a miniature aluminum crucible, adding a crucible cover, punching to prepare a sample to be detected, and placing the sample into a sample seat of a DSC analyzer for analysis. And (3) uniformly heating from 0-200 ℃ within 20 minutes by adopting nitrogen protection. The glass transition temperature was measured to be 161.0 ℃ higher than 155.0 ℃ for the lignin feedstock. Mixing the sample and KBr at a mass ratio of 1:100, grinding into fine powder, placing into a tabletting mold, and tablettingThe transparent thin sheet is placed on a sample holder for testing, and full-wavelength scanning (400-4000 nm) is carried out. At 3400cm-1The wide and strong absorption peak near the position is the stretching vibration of O-H, 2895-2920cm-1Absorption peaks at 1595cm are the stretching vibration of methyl and methylene C-H-1And 1420cm-1The absorption peak near the lignin is the skeleton vibration absorption of benzene ring, and is 2895-2920cm higher than that of the lignin raw material-1The absorption peak at (a) is significantly enhanced, indicating an increase in the number of alkyl groups in the enhanced component.
GB/T16783.1-2014 oil and gas industry drilling fluid field test part 1: water-based drilling fluid, SY-T5560 and 1992, evaluation procedure for defoamer for drilling fluid, were used to evaluate the viscosity of drilling fluid. When the dosage of the lignin-derived environment-friendly viscosity reducer for drilling fluid is 3% of the drilling fluid, the viscosity of the water-based drilling fluid can be reduced by 51% at 180 ℃, and the drilling fluid does not foam in use.
Example 6
Firstly, mixing a lignin material and 3 times of water by mass in a reaction container at normal temperature, and uniformly stirring, wherein the lignin material is industrial-grade alkali lignin, and the water is industrial-grade tap water;
secondly, adding tertiary amine and quaternizing agent with the mass ratio of 1.1:1 and water with the mass ratio of 6 times of the total mass of the tertiary amine and the quaternizing agent into another reaction vessel, uniformly stirring, reacting at 85 ℃ for 3 hours under stirring, and cooling to room temperature, wherein the tertiary amine is a composition of trimethylamine and triethanolamine with the mass ratio of industrial grade substances of 3:1, the quaternizing agent is industrial grade epichlorohydrin, and the water is industrial grade tap water;
thirdly, mixing the mixed liquor obtained in the first step and the mixed liquor obtained in the second step according to a ratio of 15:1, adding an iodide accounting for 0.2% of the mass of the mixed liquor obtained in the second step into the mixed liquor in a reaction container, uniformly stirring, reacting at 80 ℃ for 3 hours, cooling to room temperature, adding a foam inhibitor accounting for 2.5% of the mass of the lignin material, and uniformly stirring, wherein the iodide is industrial-grade potassium iodide, and the foam inhibitor is industrial-grade octadecyl trimethyl ammonium bromide;
and fourthly, evaporating the solvent of the mixture, and crushing to be below 40 meshes to obtain the lignin-derived environment-friendly viscosity reducer for the drilling fluid.
Respectively weighing 5mg of the dry lignin-derived environment-friendly viscosity reducer for drilling fluid by using an analytical balance, placing the weighed viscosity reducer in a miniature aluminum crucible, adding a crucible cover, punching to prepare a sample to be detected, and placing the sample into a sample seat of a DSC analyzer for analysis. And (3) uniformly heating from 0-200 ℃ within 20 minutes by adopting nitrogen protection. The glass transition temperature was measured to be 160.5 ℃ higher than 155.0 ℃ for the lignin feedstock. Mixing a sample and KBr according to a mass ratio of 1:100, grinding into fine powder, placing the fine powder in a tabletting mold, pressing into a transparent sheet, placing the transparent sheet on a sample rack for testing, and carrying out full-wavelength scanning (400-4000 nm). At 3400cm-1The wide and strong absorption peak near the position is the stretching vibration of O-H, 2895-2920cm-1Absorption peaks at 1595cm are the stretching vibration of methyl and methylene C-H-1And 1420cm-1The absorption peak near the lignin is the skeleton vibration absorption of benzene ring, and is 2895-2920cm higher than that of the lignin raw material-1The absorption peak at (a) is significantly enhanced, indicating an increase in the number of alkyl groups in the enhanced component.
GB/T16783.1-2014 oil and gas industry drilling fluid field test part 1: water-based drilling fluid, SY-T5560 and 1992, evaluation procedure for defoamer for drilling fluid, were used to evaluate the viscosity of drilling fluid. When the dosage of the lignin-derived environment-friendly viscosity reducer for drilling fluid is 1.2 percent of the drilling fluid, the viscosity of the water-based drilling fluid can be reduced by 44 percent at 120 ℃, and the drilling fluid does not foam in use.
Claims (7)
1. A preparation method of lignin-derived non-foam drilling fluid viscosity reducer is characterized by comprising the following steps:
1) mixing the lignin material with water of 2-10 times of the weight of the lignin material in a reaction container at normal temperature, stirring the mixture evenly,
2) adding tertiary amine and quaternizing agent with the mass ratio of 1-2:1 and water with the mass ratio of 5-20 times of the total mass of the tertiary amine and the quaternizing agent into another reaction vessel, stirring uniformly, reacting for 2-6 hours at 50-100 ℃ under stirring, cooling to room temperature,
3) mixing the mixed solution obtained in the first step and the mixed solution obtained in the second step according to the ratio of 100-10:1, adding iodide accounting for 0.1-0.5% of the mixed solution obtained in the second step into the mixed solution in a reaction container, uniformly stirring, reacting for 2-6 hours at 50-90 ℃, cooling to room temperature, adding a foam inhibitor accounting for 0.5-5% of the mass of the lignin material, uniformly stirring,
4) the solvent of the mixture is distilled off and crushed to be below 40 meshes, thus obtaining the lignin-derived environment-friendly viscosity reducer for drilling fluid.
2. The method of claim 1, wherein:
in step 1), the lignin material is alkali lignin of industrial grade and above purity, and the water is water of industrial grade and above purity.
3. The method of claim 1, wherein:
in the step 2), the tertiary amine is industrial grade or higher trimethylamine, triethylamine, triethanolamine, dimethylethanolamine and a composition thereof, the quaternizing agent is industrial grade or higher epichlorohydrin, 1, 2-dichloroethane, 1, 2-dibromoethane and a composition thereof, and the water is industrial grade or higher water.
4. The method of claim 1, wherein:
in step 3), the iodide is sodium iodide, potassium iodide and their composition with industrial grade and above purity, the foam inhibitor is dodecyl pyridine chloride, tetradecyl pyridine chloride, hexadecyl pyridine chloride, octadecyl pyridine chloride, dodecyl pyridine bromide, tetradecyl pyridine bromide, hexadecyl pyridine bromide, octadecyl pyridine bromide, dodecyl trimethyl ammonium chloride, tetradecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride, dodecyl trimethyl ammonium bromide, tetradecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium bromide, octadecyl trimethyl ammonium bromide and their composition with industrial grade and above purity.
5. A lignin-derived non-foam drilling fluid viscosity reducer, characterized by comprising the following components: quaternized lignin and a quaternary ammonium salt foam inhibitor, wherein the quaternary ammonium salt foam inhibitor accounts for 0.5-5% of the mass of the quaternized lignin.
6. The lignin-derived non-foam drilling fluid viscosity reducer of claim 5, wherein: prepared by the process of claim 1 or 2.
7. Use of the lignin-derived non-foam drilling fluid viscosity reducer of claim 5 or 6 in petrochemical industry.
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| CN201911079633.5A Active CN110791262B (en) | 2019-11-07 | 2019-11-07 | Lignin-derived non-foam drilling fluid viscosity reducer and preparation method thereof |
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