CN111500267A - Petroleum drilling auxiliary and preparation method thereof - Google Patents
Petroleum drilling auxiliary and preparation method thereof Download PDFInfo
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- CN111500267A CN111500267A CN202010519270.9A CN202010519270A CN111500267A CN 111500267 A CN111500267 A CN 111500267A CN 202010519270 A CN202010519270 A CN 202010519270A CN 111500267 A CN111500267 A CN 111500267A
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- 238000005553 drilling Methods 0.000 title claims abstract description 70
- 239000003208 petroleum Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title abstract description 18
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical class C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 235000019808 microcrystalline wax Nutrition 0.000 claims abstract description 39
- 239000004200 microcrystalline wax Substances 0.000 claims abstract description 39
- 150000003109 potassium Chemical class 0.000 claims abstract description 38
- 238000001914 filtration Methods 0.000 claims abstract description 24
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- YKVBYISUDGOVDM-UHFFFAOYSA-N 6-acetamido-4-hydroxynaphthalene-2-sulfonic acid Chemical compound C1=C(S(O)(=O)=O)C=C(O)C2=CC(NC(=O)C)=CC=C21 YKVBYISUDGOVDM-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229920001661 Chitosan Polymers 0.000 claims abstract description 18
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 18
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 claims abstract description 17
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 17
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 17
- RKFMOTBTFHXWCM-UHFFFAOYSA-M [AlH2]O Chemical compound [AlH2]O RKFMOTBTFHXWCM-UHFFFAOYSA-M 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 239000006185 dispersion Substances 0.000 claims abstract description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 52
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 39
- 239000004021 humic acid Substances 0.000 claims description 27
- 238000002156 mixing Methods 0.000 claims description 24
- 229920002125 Sokalan® Polymers 0.000 claims description 23
- 239000004584 polyacrylic acid Substances 0.000 claims description 23
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 18
- 229910052700 potassium Inorganic materials 0.000 claims description 18
- 239000011591 potassium Substances 0.000 claims description 18
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 16
- PUKLDDOGISCFCP-JSQCKWNTSA-N 21-Deoxycortisone Chemical compound C1CC2=CC(=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@@](C(=O)C)(O)[C@@]1(C)CC2=O PUKLDDOGISCFCP-JSQCKWNTSA-N 0.000 claims description 15
- FCYKAQOGGFGCMD-UHFFFAOYSA-N Fulvic acid Natural products O1C2=CC(O)=C(O)C(C(O)=O)=C2C(=O)C2=C1CC(C)(O)OC2 FCYKAQOGGFGCMD-UHFFFAOYSA-N 0.000 claims description 13
- 229940095100 fulvic acid Drugs 0.000 claims description 13
- 239000002509 fulvic acid Substances 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 12
- 239000000725 suspension Substances 0.000 claims description 12
- 239000013078 crystal Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 239000012295 chemical reaction liquid Substances 0.000 claims description 4
- 239000012752 auxiliary agent Substances 0.000 abstract description 15
- 239000000243 solution Substances 0.000 description 32
- 230000000052 comparative effect Effects 0.000 description 20
- 230000000694 effects Effects 0.000 description 16
- 239000004927 clay Substances 0.000 description 12
- 239000000654 additive Substances 0.000 description 11
- 239000012530 fluid Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 150000003839 salts Chemical class 0.000 description 8
- 239000000706 filtrate Substances 0.000 description 7
- 230000001603 reducing effect Effects 0.000 description 7
- 230000000996 additive effect Effects 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 6
- 125000000524 functional group Chemical group 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 229920005615 natural polymer Polymers 0.000 description 4
- 239000002002 slurry Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010668 complexation reaction Methods 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000011085 pressure filtration Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000012496 blank sample Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- -1 polysiloxane Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004094 surface-active 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
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- 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)
- Compositions Of Macromolecular Compounds (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention discloses a petroleum drilling aid and a preparation method thereof, belonging to the technical field of petroleum aid preparation. The petroleum drilling auxiliary comprises the following raw materials: the modified humic acid, 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, maleic anhydride acylated chitosan, modified potassium hexatitanate whisker, nonylphenol polyoxyethylene ether, linear organopolysiloxane, microcrystalline wax, hydroxy aluminum, water and petroleum drilling aid are prepared by high-speed dispersion. By improving the prior art of the petroleum drilling auxiliary agent, the high-temperature and low-temperature filtration loss is remarkably reduced, and the application requirement is met.
Description
Technical Field
The invention belongs to the technical field of petroleum additives, and particularly relates to a petroleum drilling additive and a preparation method thereof.
Background
The filtrate reducer is one of the most important additives in petroleum drilling, and plays an important role in maintaining stable performance of drilling fluid and safely and efficiently drilling. The process that free water in drilling fluid permeates to stratum under the action of pressure difference is called fluid loss, and the overlarge fluid loss often brings about a plurality of adverse results to drilling work, for example, mud cakes generated by high fluid loss can be attached to a well wall, the hydraulic diameter of a well hole and a drilling tool annular space is reduced, drilling sticking accidents are easy to occur, and in order to solve the problems that blowout, well leakage, well collapse and the like can be induced by high pumping pressure used by drilling sticking. In addition, water that penetrates the formation after fluid loss can also cause clay particles to swell and migrate, resulting in plugging of the producing formation, thereby reducing oil production. Therefore, when oil is exploited, a fluid loss additive needs to be added into the drilling fluid to reduce the fluid loss of the drilling fluid. The natural polymer fluid loss additive such as humic acid, cellulose, lignin, starch and the like is widely applied to oil exploitation due to low price and wide sources, but along with gradual deepening of a well in oil exploitation and frequent occurrence of high-temperature and high-salt reservoirs, the natural polymer fluid loss additive generally does not have the functions of high temperature resistance and salt resistance, so that the application range of the natural polymer fluid loss additive is limited. In order to improve the situation, some researchers add other temperature-resistant and salt-resistant additives into the natural polymer filtrate reducer to improve the quality of the mud cake of the drilling fluid and reduce the high-temperature and high-pressure filtrate loss, but the additives are difficult to simultaneously achieve the effects of temperature resistance and salt resistance, and in order to simultaneously achieve the effects of temperature resistance and salt resistance, the types and the amount of the additives required to be added are large, so that the complexity of the underground situation is increased, the occurrence probability of dangerous accidents is increased, and the petroleum yield is reduced. Therefore, in order to solve the above problems, it is necessary to develop a new high temperature resistant and salt resistant filtrate reducer.
Chinese patent application document 'an oil drilling auxiliary agent and a preparation method thereof (publication number: CN 109913186B)' discloses an oil drilling auxiliary agent, which comprises the following components in parts by mass: 80-100 parts of modified humic acid, 20-30 parts of 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, 10-15 parts of maleic anhydride acylated chitosan, 5-10 parts of modified potassium hexatitanate whisker, 1-2 parts of surfactant and 500 parts of water 400-. The invention also provides a preparation method of the petroleum drilling auxiliary agent. The modified humic acid and the 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid in the formula can be used in a matched mode, the synergistic effect is achieved, the high temperature resistance and salt resistance effects of the filtrate reducer are improved, the modified potassium hexatitanate whisker is particularly excellent in high temperature resistance, and the dosage of the filtrate reducer in drilling fluid can be reduced. The petroleum drilling auxiliary agent disclosed by the invention has the functions of resisting high temperature of 260 ℃ and saturated saline water, can effectively reduce the filtration loss of drilling fluid, has a wide application prospect, but the performance of the petroleum drilling auxiliary agent is still to be improved, and cannot meet the application requirements.
Disclosure of Invention
The invention provides a petroleum drilling auxiliary agent and a preparation method thereof, and aims to solve the problems of how to optimize components, dosage and the like and further improve the effects of reducing filtration loss and resisting heat on the basis of the petroleum drilling auxiliary agent disclosed in the Chinese patent application document 'a petroleum drilling auxiliary agent and a preparation method thereof (publication number: CN 109913186B').
In order to solve the technical problems, the invention adopts the following technical scheme:
an oil drilling aid comprising the following raw materials: modified humic acid, 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, maleic anhydride acylated chitosan, modified potassium hexatitanate whisker, nonylphenol polyoxyethylene ether, linear organopolysiloxane, microcrystalline wax, aluminum hydroxide and water; the weight ratio of the linear polyorganosiloxane, the microcrystalline wax and the aluminum hydroxide is (10-14): (6-10): (3-5).
Further, the weight ratio of the linear poly-organic polysiloxane, the microcrystalline wax and the aluminum hydroxide is 13:7: 4.
Further, the petroleum drilling aid comprises the following raw materials in parts by weight: 80-100 parts of modified humic acid, 20-30 parts of 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, 10-15 parts of maleic anhydride acylated chitosan, 5-10 parts of modified potassium hexatitanate whisker, 1-2 parts of nonylphenol polyoxyethylene ether, 10-14 parts of linear organopolysiloxane, 6-10 parts of microcrystalline wax, 3-5 parts of hydroxyl aluminum and 500 parts of water 400-.
Further, the petroleum drilling aid comprises the following raw materials in parts by weight: 90 parts of modified humic acid, 25 parts of 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, 12.5 parts of maleic anhydride acylated chitosan, 7.5 parts of modified potassium hexatitanate whisker, 1.5 parts of nonylphenol polyoxyethylene ether, 13 parts of linear organopolysiloxane, 7 parts of microcrystalline wax, 4 parts of hydroxy aluminum and 450 parts of water.
Further, the modified humic acid is obtained by modifying humic acid with polyacrylic acid and a silane coupling agent, and is prepared by the following steps: dissolving polyacrylic acid in ethanol to obtain a solution A; adding a silane coupling agent KH550 into the solution A, and uniformly mixing to obtain a solution B; adding humic acid into the solution B, uniformly dispersing by ultrasonic, heating to 60-80 ℃, reacting for 4-5h under the condition of stirring, filtering after the reaction is finished, and drying to obtain the modified humic acid; wherein the mass ratio of the polyacrylic acid to the silane coupling agent KH550 to the humic acid to the ethanol is 1-2: 2: 20: 100.
further, the oil drilling aid according to claim 5, wherein the mass ratio of the polyacrylic acid to the silane coupling agent KH550 to the humic acid to the ethanol is 1.7: 2: 20: 100.
further, the modified potassium hexatitanate whisker is obtained by modifying potassium hexatitanate crystal with silane coupling agent, and is prepared by the following steps: mixing and dissolving a silane coupling agent KH550 and ethanol according to a mass ratio of 1:20 to obtain a solution C; mixing potassium hexatitanate whiskers with ethanol according to a mass ratio of 1:10, and performing ultrasonic dispersion to obtain a suspension; dropwise adding the solution C into the suspension under the stirring condition, reacting at 60 ℃ for 1-2h after dropwise adding is finished, and then filtering and drying the reaction liquid to obtain the modified potassium hexatitanate whisker; wherein the mass ratio of the silane coupling agent KH550 to the potassium hexatitanate whisker is 1: 20-30.
Furthermore, the modified potassium hexatitanate whisker has the diameter of 0.2-1.0 micron and the length of 8-12 microns.
Further, the humic acid is fulvic acid.
The invention also provides a preparation method of the petroleum drilling auxiliary agent, which comprises the following steps: weighing modified humic acid, 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, maleic anhydride acylated chitosan, modified potassium hexatitanate whisker, nonylphenol polyoxyethylene ether, linear organopolysiloxane, microcrystalline wax, hydroxy aluminum and water in parts by weight, mixing, dispersing at high speed, and obtaining the petroleum drilling aid after the dispersion is finished.
The invention has the following beneficial effects:
(1) according to the invention, the modified fulvic acid is added, the fulvic acid has numerous functional groups on the molecules, but the heat and salt resistance is poor, so that the fulvic acid is modified by adopting polyacrylic acid and a silane coupling agent to improve the heat and salt resistance of the fulvic acid; after fulvic acid is modified by polyacrylic acid, carboxyl in the polyacrylic acid can be combined with functional groups in the fulvic acid to form macromolecules with a space grid structure, and when the modified fulvic acid is used as a filtrate reducer applied to drilling fluid, clay particles can be adsorbed onto molecular chains of the grid structure to block linear motion of the clay particles, so that the clay particles are difficult to contact with each other and bond; the modified potassium hexatitanate whisker is added in the formula, is a high-heat-resistant substance, can resist high temperature under the condition of extremely small using amount, and can further improve the heat resistance of the fluid loss additive when being used in the system.
(2) The linear poly-organopolysiloxane, the microcrystalline wax and the aluminum hydroxide play a synergistic role in preparing the petroleum drilling auxiliary agent, and the fluid loss reducing effect is synergistically improved, and the possible mechanism is presumed as follows:
the microcrystalline wax has high viscosity and ductility, can effectively fuse fulvic acid, can improve the heat resistance effect, has a strong impregnation function, and improves the viscosity, so that the movement of clay particles is reduced, and the effect of reducing the fluid loss is achieved; the linear polyorganopolysiloxane has the viscosity of about 5000mPas, has good heat-resistant effect, can further improve the heat-resistant effect of the petroleum drilling aid, and can be used together with the microcrystalline wax to greatly improve the performance of the microcrystalline wax, prevent the microcrystalline wax from being separated from other components, improve the dispersibility and stabilize the aluminum hydroxide; the aluminum hydroxide plays an important role in preventing the clay particles from loosening and structurally expanding, can effectively improve the density of nearby clay, thereby reducing the filtration effect and effectively improving the integrity of the clay, active functional groups of the aluminum hydroxide can be complexed with acid substances, and the linear polyorganopolysiloxane is added, so that the complexation of the active functional groups and acid substances can be effectively reduced, and the effect is improved.
(3) The invention improves the prior art for preparing the petroleum drilling auxiliary agent, and the filtration loss and heat resistance are obviously improved.
Detailed Description
In order to facilitate a better understanding of the invention, the following examples are given to illustrate, but not to limit the scope of the invention.
In an embodiment, the petroleum drilling aid comprises the following raw materials in parts by weight: 80-100 parts of modified humic acid, 20-30 parts of 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, 10-15 parts of maleic anhydride acylated chitosan, 5-10 parts of modified potassium hexatitanate whisker, 1-2 parts of nonylphenol polyoxyethylene ether, 10-14 parts of linear organopolysiloxane, 6-10 parts of microcrystalline wax, 3-5 parts of hydroxyl aluminum and 500 parts of water 400-.
The modified humic acid is obtained by modifying humic acid with polyacrylic acid and a silane coupling agent, and is prepared by the following steps: dissolving polyacrylic acid in ethanol to obtain a solution A; adding a silane coupling agent KH550 into the solution A, and uniformly mixing to obtain a solution B; adding humic acid into the solution B, uniformly dispersing by ultrasonic, heating to 60-80 ℃, reacting for 4-5h under the condition of stirring, filtering after the reaction is finished, and drying to obtain the modified humic acid; wherein the mass ratio of the polyacrylic acid to the silane coupling agent KH550 to the humic acid to the ethanol is 1-2: 2: 20: 100.
the modified potassium hexatitanate crystal whisker is obtained by modifying potassium hexatitanate crystal with silane coupling agent, and is prepared by the following steps: mixing and dissolving a silane coupling agent KH550 and ethanol according to a mass ratio of 1:20 to obtain a solution C; mixing potassium hexatitanate whiskers with ethanol according to a mass ratio of 1:10, and performing ultrasonic dispersion to obtain a suspension; dropwise adding the solution C into the suspension under the stirring condition, reacting at 60 ℃ for 1-2h after dropwise adding is finished, and then filtering and drying the reaction liquid to obtain the modified potassium hexatitanate whisker; wherein the mass ratio of the silane coupling agent KH550 to the potassium hexatitanate whisker is 1: 20-30.
The modified potassium hexatitanate whisker has the diameter of 0.2-1.0 micron and the length of 8-12 microns.
The humic acid is fulvic acid.
The preparation method of the petroleum drilling auxiliary comprises the following steps: weighing modified humic acid, 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, maleic anhydride acylated chitosan, modified potassium hexatitanate whisker, nonylphenol polyoxyethylene ether, linear organopolysiloxane, microcrystalline wax, hydroxy aluminum and water in parts by weight, mixing, dispersing at high speed, and obtaining the petroleum drilling aid after the dispersion is finished.
Example 1
The petroleum drilling auxiliary comprises the following raw materials in parts by weight: 90 parts of modified humic acid, 25 parts of 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, 12.5 parts of maleic anhydride acylated chitosan, 7.5 parts of modified potassium hexatitanate whisker, 1.5 parts of nonylphenol polyoxyethylene ether, 13 parts of linear organopolysiloxane, 7 parts of microcrystalline wax, 4 parts of hydroxy aluminum and 450 parts of water.
The modified humic acid is obtained by modifying humic acid with polyacrylic acid and a silane coupling agent, and is prepared by the following steps: dissolving polyacrylic acid in ethanol to obtain a solution A; adding a silane coupling agent KH550 into the solution A, and uniformly mixing to obtain a solution B; adding humic acid into the solution B, uniformly dispersing by ultrasonic, heating to 75 ℃, reacting for 4 hours under the condition of stirring, filtering after the reaction is finished, and drying to obtain the modified humic acid; wherein the mass ratio of the polyacrylic acid to the silane coupling agent KH550 to the humic acid to the ethanol is 1.7: 2: 20: 100.
the modified potassium hexatitanate crystal whisker is obtained by modifying potassium hexatitanate crystal with silane coupling agent, and is prepared by the following steps: mixing and dissolving a silane coupling agent KH550 and ethanol according to a mass ratio of 1:20 to obtain a solution C; mixing potassium hexatitanate whiskers with ethanol according to a mass ratio of 1:10, and performing ultrasonic dispersion to obtain a suspension; dropwise adding the solution C into the suspension under the stirring condition, reacting at 60 ℃ for 1.5h after dropwise adding is finished, and then filtering and drying the reaction solution to obtain the modified potassium hexatitanate whisker; wherein the mass ratio of the silane coupling agent KH550 to the potassium hexatitanate whisker is 1: 26.
the modified potassium hexatitanate whisker has the diameter of 1 micron and the length of 9 microns.
The humic acid is fulvic acid.
The preparation method of the petroleum drilling auxiliary comprises the following steps: weighing modified humic acid, 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, maleic anhydride acylated chitosan, modified potassium hexatitanate whisker, nonylphenol polyoxyethylene ether, linear organopolysiloxane, microcrystalline wax, hydroxy aluminum and water in parts by weight, mixing, dispersing at high speed, and obtaining the petroleum drilling aid after the dispersion is finished.
Example 2
The petroleum drilling auxiliary comprises the following raw materials in parts by weight: 80 parts of modified humic acid, 30 parts of 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, 10 parts of maleic anhydride acylated chitosan, 10 parts of modified potassium hexatitanate whisker, 1 part of nonylphenol polyoxyethylene ether, 14 parts of linear organopolysiloxane, 6 parts of microcrystalline wax, 5 parts of hydroxy aluminum and 400 parts of water.
The modified humic acid is obtained by modifying humic acid with polyacrylic acid and a silane coupling agent, and is prepared by the following steps: dissolving polyacrylic acid in ethanol to obtain a solution A; adding a silane coupling agent KH550 into the solution A, and uniformly mixing to obtain a solution B; adding humic acid into the solution B, uniformly dispersing by ultrasonic, heating to 62 ℃, reacting for 4.3 hours under the condition of stirring, filtering after the reaction is finished, and drying to obtain the modified humic acid; wherein the mass ratio of the polyacrylic acid to the silane coupling agent KH550 to the humic acid to the ethanol is 1: 2: 20: 100.
the modified potassium hexatitanate crystal whisker is obtained by modifying potassium hexatitanate crystal with silane coupling agent, and is prepared by the following steps: mixing and dissolving a silane coupling agent KH550 and ethanol according to a mass ratio of 1:20 to obtain a solution C; mixing potassium hexatitanate whiskers with ethanol according to a mass ratio of 1:10, and performing ultrasonic dispersion to obtain a suspension; dropwise adding the solution C into the suspension under the stirring condition, reacting at 60 ℃ for 1h after dropwise adding is finished, and then filtering and drying the reaction solution to obtain the modified potassium hexatitanate whisker; wherein the mass ratio of the silane coupling agent KH550 to the potassium hexatitanate whisker is 1: 22.
the modified potassium hexatitanate whisker has a diameter of 3 microns and a length of 10 microns.
The humic acid is fulvic acid.
The preparation method of the petroleum drilling auxiliary comprises the following steps: weighing modified humic acid, 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, maleic anhydride acylated chitosan, modified potassium hexatitanate whisker, nonylphenol polyoxyethylene ether, linear organopolysiloxane, microcrystalline wax, hydroxy aluminum and water in parts by weight, mixing, dispersing at high speed, and obtaining the petroleum drilling aid after the dispersion is finished.
Example 3
The petroleum drilling auxiliary comprises the following raw materials in parts by weight: 100 parts of modified humic acid, 20 parts of 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, 15 parts of maleic anhydride acylated chitosan, 5 parts of modified potassium hexatitanate whisker, 2 parts of nonylphenol polyoxyethylene ether, 10 parts of linear organopolysiloxane, 10 parts of microcrystalline wax, 3 parts of hydroxy aluminum and 500 parts of water.
The modified humic acid is obtained by modifying humic acid with polyacrylic acid and a silane coupling agent, and is prepared by the following steps: dissolving polyacrylic acid in ethanol to obtain a solution A; adding a silane coupling agent KH550 into the solution A, and uniformly mixing to obtain a solution B; adding humic acid into the solution B, uniformly dispersing by ultrasonic, heating to 80 ℃, reacting for 4.2 hours under the condition of stirring, filtering after the reaction is finished, and drying to obtain the modified humic acid; wherein the mass ratio of the polyacrylic acid to the silane coupling agent KH550 to the humic acid to the ethanol is 1.3: 2: 20: 100.
the modified potassium hexatitanate crystal whisker is obtained by modifying potassium hexatitanate crystal with silane coupling agent, and is prepared by the following steps: mixing and dissolving a silane coupling agent KH550 and ethanol according to a mass ratio of 1:20 to obtain a solution C; mixing potassium hexatitanate whiskers with ethanol according to a mass ratio of 1:10, and performing ultrasonic dispersion to obtain a suspension; dropwise adding the solution C into the suspension under the stirring condition, reacting at 60 ℃ for 2h after dropwise adding is finished, and then filtering and drying the reaction liquid to obtain the modified potassium hexatitanate whisker; wherein the mass ratio of the silane coupling agent KH550 to the potassium hexatitanate whisker is 1: 28.
the modified potassium hexatitanate whisker has the diameter of 6 microns and the length of 12 microns.
The humic acid is fulvic acid.
The preparation method of the petroleum drilling auxiliary comprises the following steps: weighing modified humic acid, 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, maleic anhydride acylated chitosan, modified potassium hexatitanate whisker, nonylphenol polyoxyethylene ether, linear organopolysiloxane, microcrystalline wax, hydroxy aluminum and water in parts by weight, mixing, dispersing at high speed, and obtaining the petroleum drilling aid after the dispersion is finished.
Comparative example 1
The procedure of example 1 was followed except that the raw materials for the preparation of the petroleum drilling aid lacked linear polyorganopolysiloxane, microcrystalline wax, and aluminum hydroxy.
Comparative example 2
Essentially the same procedure as in example 1, except that the raw materials for making the petroleum drilling aid lack linear polyorganopolysiloxane.
Comparative example 3
Essentially the same procedure as in example 1 except that the microcrystalline wax is absent from the feedstock for the preparation of the petroleum drilling aid.
Comparative example 4
Essentially the same procedure as in example 1 except that the feedstock for the production of the petroleum drilling aid lacks aluminum hydroxy.
Comparative example 5
The petroleum drilling assistant was prepared by the method of example 1, which is "a petroleum drilling assistant and its preparation method (publication number: CN 109913186B)".
Comparative example 6
The procedure was essentially the same as in example 1 except for the addition of 16 parts of linear polyorganopolysiloxane, 4 parts of microcrystalline wax and 6 parts of aluminum hydroxy.
Comparative example 7
The procedure was essentially the same as in example 1 except for 8 parts of linear polyorganopolysiloxane, 12 parts of microcrystalline wax and 2 parts of aluminum hydroxy.
Comparative example 8
The preparation process is basically the same as that of example 1 except for 15 parts of linear polyorganopolysiloxane, 12 parts of microcrystalline wax and 6 parts of aluminum hydroxide.
Adding 16g of bentonite into 400m L saturated salt solution, stirring at a stirring speed of 2000r/min for 30min, and sealing and maintaining at room temperature for 24h to obtain base slurry.
Taking 10 parts of base slurry, taking one part as a blank sample, adding no auxiliary agent, adding only one auxiliary agent prepared in examples 1-3 and comparative examples 1-8 to the other 9 parts, wherein the addition amount is 0.5 percent of the weight of the fresh water base slurry, stirring for 30min at a stirring speed of 2000r/min after the addition is finished, measuring the filtration loss after aging for 16h at 260 ℃, and measuring the filtration loss of the sample by using a normal-temperature medium-pressure filtration loss instrument and a high-temperature high-pressure filtration loss instrument, wherein the specific results are shown in the following table.
| Experimental project | Filtration loss at room temperature | High temperature filtration loss |
| Example 1 | 6.7 | 19.3 |
| Example 2 | 6.9 | 20.1 |
| Example 3 | 7.2 | 20.7 |
| Comparative example 1 | 10.5 | 28.4 |
| Comparative example 2 | 8.0 | 22.1 |
| Comparative example 3 | 7.8 | 21.2 |
| Comparative example 4 | 7.5 | 21.6 |
| Comparative example 5 | 8.7 | 26.5 |
| Comparative example 6 | 8.1 | 24.7 |
| Comparative example 7 | 8.2 | 23.1 |
| Comparative example 8 | 8.4 | 23.9 |
From the above table, it can be seen that:
(1) from the data of examples 1-3, it can be seen that example 1 is the most preferred example.
(2) As can be seen from the data of example 1 and comparative examples 1-4, the linear polyorganopolysiloxane, the microcrystalline wax and the aluminum hydroxide act synergistically in preparing the petroleum drilling aid to synergistically reduce the normal-temperature and high-temperature filtration loss, and the possible mechanism is presumed as follows:
the microcrystalline wax has high viscosity and ductility, can effectively fuse fulvic acid, can improve the heat resistance effect, has a strong impregnation function, and improves the viscosity, so that the movement of clay particles is reduced, and the effect of reducing the fluid loss is achieved; the linear polyorganopolysiloxane has the viscosity of about 5000mPas, has good heat-resistant effect, can further improve the heat-resistant effect of the petroleum drilling aid, and can be used together with the microcrystalline wax to greatly improve the performance of the microcrystalline wax, prevent the microcrystalline wax from being separated from other components, improve the dispersibility and stabilize the aluminum hydroxide; the aluminum hydroxide plays an important role in preventing the clay particles from loosening and structurally expanding, can effectively improve the density of nearby clay, thereby reducing the filtration effect and effectively improving the integrity of the clay, active functional groups of the aluminum hydroxide can be complexed with acid substances, and the linear polyorganopolysiloxane is added, so that the complexation of the active functional groups and acid substances can be effectively reduced, and the effect is improved.
(3) As can be seen from comparison of the data of example 1 and comparative example 5, the normal and high temperature fluid loss was significantly reduced by the improvement of the prior art.
(4) As can be seen from the data of comparative examples 6-8, the weight ratio of the linear polyorganopolysiloxane, microcrystalline wax, aluminum hydroxy is not (10-14): (6-10): (3-5), the values of normal and high temperature fluid loss obtained were very different from those of examples 1-3 and much smaller than those of examples 1-3. The invention takes linear poly-organopolysiloxane, microcrystalline wax and aluminum hydroxide as a reinforcing system, and the weight ratio of linear poly-organopolysiloxane, microcrystalline wax and aluminum hydroxide is controlled to be (10-14): (6-10): (3-5), so that the normal temperature and high temperature filtration loss can be effectively reduced when the reinforcing system is applied to the petroleum drilling auxiliary agent.
The above description should not be taken as limiting the invention to the embodiments, but rather, as will be apparent to those skilled in the art to which the invention pertains, numerous simplifications or substitutions may be made without departing from the spirit of the invention, which shall be deemed to fall within the scope of the invention as defined by the claims appended hereto.
Claims (10)
1. An oil drilling aid, characterized by comprising the following raw materials: modified humic acid, 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, maleic anhydride acylated chitosan, modified potassium hexatitanate whisker, nonylphenol polyoxyethylene ether, linear organopolysiloxane, microcrystalline wax, aluminum hydroxide and water; the weight ratio of the linear polyorganosiloxane, the microcrystalline wax and the aluminum hydroxide is (10-14): (6-10): (3-5).
2. The oil drilling aid of claim 1, wherein the weight ratio of linear polyorganopolysiloxane, microcrystalline wax, and aluminum hydroxy is 13:7: 4.
3. The oil drilling aid of claim 1, comprising the following raw materials in parts by weight: 80-100 parts of modified humic acid, 20-30 parts of 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, 10-15 parts of maleic anhydride acylated chitosan, 5-10 parts of modified potassium hexatitanate whisker, 1-2 parts of nonylphenol polyoxyethylene ether, 10-14 parts of linear organopolysiloxane, 6-10 parts of microcrystalline wax, 3-5 parts of hydroxyl aluminum and 500 parts of water 400-.
4. The oil drilling aid of claim 3, comprising the following raw materials in parts by weight: 90 parts of modified humic acid, 25 parts of 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, 12.5 parts of maleic anhydride acylated chitosan, 7.5 parts of modified potassium hexatitanate whisker, 1.5 parts of nonylphenol polyoxyethylene ether, 13 parts of linear organopolysiloxane, 7 parts of microcrystalline wax, 4 parts of hydroxy aluminum and 450 parts of water.
5. The oil drilling aid as claimed in claim 1, 3 or 4, wherein the modified humic acid is obtained by modifying humic acid with polyacrylic acid and silane coupling agent, and is prepared by the following steps: dissolving polyacrylic acid in ethanol to obtain a solution A; adding a silane coupling agent KH550 into the solution A, and uniformly mixing to obtain a solution B; adding humic acid into the solution B, uniformly dispersing by ultrasonic, heating to 60-80 ℃, reacting for 4-5h under the condition of stirring, filtering after the reaction is finished, and drying to obtain the modified humic acid; wherein the mass ratio of the polyacrylic acid to the silane coupling agent KH550 to the humic acid to the ethanol is 1-2: 2: 20: 100.
6. the oil drilling aid according to claim 5, wherein the mass ratio of the polyacrylic acid to the silane coupling agent KH550 to the humic acid to the ethanol is 1.7: 2: 20: 100.
7. the oil drilling aid according to claim 1, 3 or 4, wherein the modified potassium hexatitanate whiskers are obtained by modifying potassium hexatitanate crystals with a silane coupling agent, and are prepared by the following steps: mixing and dissolving a silane coupling agent KH550 and ethanol according to a mass ratio of 1:20 to obtain a solution C; mixing potassium hexatitanate whiskers with ethanol according to a mass ratio of 1:10, and performing ultrasonic dispersion to obtain a suspension; dropwise adding the solution C into the suspension under the stirring condition, reacting at 60 ℃ for 1-2h after dropwise adding is finished, and then filtering and drying the reaction liquid to obtain the modified potassium hexatitanate whisker; wherein the mass ratio of the silane coupling agent KH550 to the potassium hexatitanate whisker is 1: 20-30.
8. The oil drilling aid of claim 7, wherein the modified potassium hexatitanate whiskers have a diameter of 0.2-1.0 microns and a length of 8-12 microns.
9. The oil drilling aid of claim 5, wherein the humic acid is fulvic acid.
10. A method of preparing an oil drilling aid according to any one of claims 1 to 9, comprising the steps of: weighing modified humic acid, 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, maleic anhydride acylated chitosan, modified potassium hexatitanate whisker, nonylphenol polyoxyethylene ether, linear organopolysiloxane, microcrystalline wax, hydroxy aluminum and water in parts by weight, mixing, dispersing at high speed, and obtaining the petroleum drilling aid after the dispersion is finished.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112521920A (en) * | 2020-12-09 | 2021-03-19 | 江西省三汇科技有限公司 | Humic acid-containing drilling mud treating agent |
| CN112708403A (en) * | 2020-12-29 | 2021-04-27 | 扬州工业职业技术学院 | Petroleum drilling fluid and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109913186A (en) * | 2019-04-10 | 2019-06-21 | 陕西延长石油（集团）有限责任公司 | A kind of assistant for drilling petroleum well and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109913186A (en) * | 2019-04-10 | 2019-06-21 | 陕西延长石油（集团）有限责任公司 | A kind of assistant for drilling petroleum well and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112521920A (en) * | 2020-12-09 | 2021-03-19 | 江西省三汇科技有限公司 | Humic acid-containing drilling mud treating agent |
| CN112708403A (en) * | 2020-12-29 | 2021-04-27 | 扬州工业职业技术学院 | Petroleum drilling fluid and preparation method thereof |
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