CN111793488B - Chemical sand prevention agent for wood tar, preparation method and application thereof - Google Patents
Chemical sand prevention agent for wood tar, preparation method and application thereof Download PDFInfo
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- CN111793488B CN111793488B CN201910274187.7A CN201910274187A CN111793488B CN 111793488 B CN111793488 B CN 111793488B CN 201910274187 A CN201910274187 A CN 201910274187A CN 111793488 B CN111793488 B CN 111793488B
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- 239000004576 sand Substances 0.000 title claims abstract description 111
- 239000011276 wood tar Substances 0.000 title claims abstract description 69
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 64
- 239000000126 substance Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 230000002265 prevention Effects 0.000 title claims abstract description 15
- 239000007864 aqueous solution Substances 0.000 claims abstract description 15
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 48
- 238000000034 method Methods 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 18
- 239000000243 solution Substances 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 12
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- BGJSXRVXTHVRSN-UHFFFAOYSA-N 1,3,5-trioxane Chemical group C1OCOCO1 BGJSXRVXTHVRSN-UHFFFAOYSA-N 0.000 claims description 4
- 229930040373 Paraformaldehyde Natural products 0.000 claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 229920002866 paraformaldehyde Polymers 0.000 claims description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims 1
- 235000017557 sodium bicarbonate Nutrition 0.000 claims 1
- 230000035699 permeability Effects 0.000 abstract description 16
- 238000011084 recovery Methods 0.000 abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 105
- 239000000203 mixture Substances 0.000 description 18
- 239000003921 oil Substances 0.000 description 15
- 239000011521 glass Substances 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 14
- 238000003756 stirring Methods 0.000 description 13
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 12
- 239000005011 phenolic resin Substances 0.000 description 12
- 229920001568 phenolic resin Polymers 0.000 description 12
- 238000005303 weighing Methods 0.000 description 12
- 239000007795 chemical reaction product Substances 0.000 description 11
- 239000003129 oil well Substances 0.000 description 10
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 8
- 238000007596 consolidation process Methods 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 8
- 239000008098 formaldehyde solution Substances 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 239000006004 Quartz sand Substances 0.000 description 7
- 239000011259 mixed solution Substances 0.000 description 7
- 239000000047 product Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 239000008399 tap water Substances 0.000 description 5
- 235000020679 tap water Nutrition 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 150000002989 phenols Chemical class 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 150000002894 organic compounds Chemical group 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- -1 precoated gravel Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 239000003377 acid catalyst Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000003124 biologic agent Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000007849 furan resin Substances 0.000 description 1
- 159000000011 group IA salts Chemical class 0.000 description 1
- 150000007529 inorganic bases Chemical class 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water 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
- C09K8/56—Compositions for consolidating loose sand or the like around wells without excessively decreasing the permeability thereof
- C09K8/57—Compositions based on water or polar solvents
- C09K8/575—Compositions based on water or polar solvents containing organic compounds
- C09K8/5751—Macromolecular compounds
- C09K8/5758—Macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
Landscapes
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a wood tar chemical sand prevention agent and a preparation method and application thereof. The preparation method of the wood tar chemical sand control agent comprises the following steps: the wood tar and aldehyde are contacted and reacted in an alkaline aqueous solution to obtain the wood tar chemical sand prevention agent. The chemical sand control agent prepared by the invention has low raw material cost and simple preparation process, is cemented with sand grains at high temperature into a honeycomb-shaped consolidated body, has good pressure resistance, permeability and temperature resistance, and is suitable for thick oil thermal recovery sand control.
Description
Technical Field
The invention relates to a chemical sand control agent and a preparation method thereof, and mainly relates to the field of oilfield chemistry.
Background
China's loose sandstone reservoir has a large distribution range, a large reserve and an important position for production. However, under general exploitation conditions, the sand production hazard of an oil well is extremely large, which is mainly shown in the following steps: severely abrade surface and downhole equipment and even cause sand sticking; maintenance workload such as a sand washing inspection pump, a ground kettle cleaning and the like is increased sharply; the oil well is stopped due to sand blocking of a sand-buried oil layer or a shaft; when the sand production is serious, the well wall and even an oil layer collapse to damage a casing and even cause the abandonment of an oil well. These hazards increase both the production cost of the crude oil and the difficulty of oil field exploitation. Therefore, in order to prevent the sand production of the oil well, on one hand, a well cementation and completion mode is correctly selected according to an oil layer and oil well conditions, reasonable exploitation measures are made, and the management of the sand production layer oil well is enhanced; on the other hand, according to the requirements of an oil layer and a mining process, a corresponding sand prevention process technology is adopted to ensure the normal production of the oil well. At present, the domestic sand control process comprises the composite sand control processes of mechanical sand control such as wire-wrapped screen pipe gravel filling sand control, sand control of sand filter pipes and the like, chemical sand control agent chemical sand control, hydraulic fracturing-gravel filling composite sand control, precoated gravel and various sand filter pipes composite sand control and the like. The chemical sand control technology is suitable for thin-layer short well sections, the sand control effect on the siltstone stratum is good, no mechanical device is left in a shaft after construction, post-treatment is convenient, construction is convenient especially for thick oil thermal production wells, and the effect is good. At present, chemical sand control is mainly divided into two methods, namely artificial cemented formation and artificial well wall. An artificial cemented formation is one in which resin or other chemical sand-fixing agents are injected into the formation to directly consolidate the sand in the formation. The artificial well wall is formed by extruding resin sand slurry, precoated gravel, water-bearing dry mortar, cement mortar, emulsified cement and the like into the stratum around a shaft and solidifying the mixture to have certain strength and permeability. Therefore, the key of the technology is to develop the chemical sand control agent with excellent performance.
CN102311727B discloses a temperature-resistant phenolic resin sand control agent, a preparation method and an application thereof, the method enables coal tar and aldehyde substances to react under the action of an acid catalyst, and then a reaction product is mixed with phenolic resin to obtain the temperature-resistant phenolic resin sand control agent. The sand control agent can be used for improving the scouring resistance and the corrosion resistance of the artificial well wall to high-temperature steam in the steam injection process, and improving the sand control validity period of a steam huff-puff oil well.
CN103305201B discloses a resin sand control agent for a thick oil thermal recovery horizontal well, which is suitable for the production conditions of the thick oil thermal recovery horizontal well. The formula of the sand control agent comprises the following components: 40 to 50 percent of phenolic resin; 20-30% of furan resin; 5 to 15 percent of organic silicon resin; 10-20% of heat-resistant auxiliary agent; 5 to 10 percent of blending agent.
CN104650840B discloses a high-strength high-permeability chemical sand control agent, a preparation method and application thereof. The sand control agent consists of a propping agent, a cementing agent, an accelerating agent, a curing agent and a coupling agent in a certain proportion, has better tolerance to acid, water, salt and oil, has higher stability in high-temperature and high-humidity environments, is mainly applied to production of chemical sand control well extract and sand control of serious casing deformation wells, can not adopt wells for mechanical sand control and oil-water wells with lower oil layer temperature for sand control, and achieves the purposes of improving the liquid production amount of an oil well, prolonging the effective period of sand control of the oil well, increasing the oil production amount and reducing the production cost. Although the sand control agent has good sand control effect, the use range is limited, the preparation process is complex, the cost of raw materials is high, and the pressure resistance, permeability and temperature resistance are required to be improved.
Disclosure of Invention
Aiming at the technical defects, the invention provides a chemical sand control agent for wood tar and a preparation method thereof.
The invention also provides an application method of the wood tar chemical sand control agent.
The invention also provides a method for modifying wood tar and the modified wood tar product.
The invention also provides an application method of the modified wood tar.
The preparation method of the wood tar chemical sand control agent provided by the invention comprises the following steps: the wood tar and aldehyde are contacted and reacted in an alkaline aqueous solution to obtain the wood tar chemical sand prevention agent.
The density of the wood tar is 0.97-1.20 g/cm 3 (20 ℃ C.), an oxygen content of 35 to 60% and a viscosity of 5000 mPas or less (50 ℃ C.).
The aldehyde is selected from one or more of formaldehyde, paraformaldehyde and trioxymethylene. The mass ratio of the aldehyde to the wood tar is 1:3-15, preferably 1:3-10. The aldehyde is preferably prepared into an aqueous solution, and the mass concentration of the aldehyde in the aqueous solution is 20-40%.
The alkaline aqueous solution contains alkaline substance selected from inorganic base, alkaline salt, such as one or two of sodium hydroxide, potassium hydroxide, ammonia water, sodium carbonate, potassium carbonate, sodium bicarbonate, etc., preferably sodium hydroxide and potassium hydroxide. The mass ratio of the alkaline substance to the wood tar is 1:5 to 25, preferably 1:5 to 10. The mass concentration of the alkaline aqueous solution is 10-20%.
The reaction temperature is 20 to 60 ℃, preferably 30 to 50 ℃.
The reaction pressure is normal pressure.
The reaction time is 20 to 60min, preferably 30 to 60min.
According to a preferred embodiment of the present invention, the sand control agent may be prepared in the following manner: preparing a certain mass of alkaline aqueous solution, and uniformly mixing the alkaline aqueous solution and wood tar in proportion; and secondly, adding aldehyde substances into the mixed solution for reaction to obtain corresponding reaction products.
According to a preferred embodiment of the present invention, a proper amount of water may be further added to the above reaction product to control the sand control agent product in a proper concentration range for better fluidity. The water is common water such as tap water, well water and distilled water, and the addition of the water is controlled so that the mass fraction of the wood tar sand prevention agent (based on the mass of the wood tar raw material) in the whole reaction system is 20-40%.
According to a preferred embodiment of the present invention, a phenol solution (5 to 30%, preferably 10 to 20% aqueous solution of sodium hydroxide or potassium hydroxide) with a mass concentration of 5 to 30%, preferably 10 to 20% may be added to the wood tar chemical sand control agent and mixed uniformly. The mass ratio of the phenol to the wood tar chemical sand control agent is 1.
The invention also provides the wood tar chemical sand control agent prepared by the method.
The invention provides an application method of the wood tar chemical sand control agent, which comprises the following steps: the wood tar chemical sand prevention agent is injected into the stratum through a fixed pipe column, and after the high-temperature action, the wood tar chemical sand prevention agent is cemented with sand grains to form a consolidated body, so that the sand consolidation effect is achieved.
The invention provides a method for modifying wood tar, which comprises the following steps: the wood tar and aldehyde are contacted and reacted in an alkaline aqueous solution to obtain the modified wood tar.
The present invention provides a modified wood tar product obtained according to the above-described method.
The invention provides an application method of the modified wood tar, which comprises the following steps: the modified wood tar is injected into the stratum through a fixed pipe column, and after the high-temperature action, the modified wood tar is cemented with sand grains to form a consolidated body, so that the sand consolidation effect is achieved.
The wood tar is an organic compound containing phenols, hydrocarbons and acids generated by cracking plants at 450-500 ℃, is a brownish black viscous liquid, is a biological agent, has the functions of sterilization, corrosion prevention and foaming, and is green and environment-friendly.
The invention prepares the chemical sand control agent by modifying the wood tar, the product has good flowing property, the chemical sand control agent and sand grains can be cemented into a honeycomb-shaped consolidation body at high temperature by injecting the chemical sand control agent into the stratum through a fixed pipe column, and the chemical sand control agent has good pressure resistance, permeability and temperature resistance and is suitable for thick oil thermal recovery sand control.
Ordinary phenolic resin is easy to be oxidized at high temperature, so that the temperature resistance is poor, a continuous pore structure cannot be formed in a stratum, and the ordinary phenolic resin cannot adapt to chemical sand control of a thermal production well. The wood tar is an organic compound rich in phenols, hydrocarbons and acids, and the contained hydrocarbon compound has a larger plane structure, can shield methylene and phenolic hydroxyl in the structure of the phenolic resin product, and inhibit high-temperature oxidation of the phenolic resin product, so that the temperature resistance of the modified wood tar is enhanced; the contained phenolic compounds can replace phenol and aldehyde compounds to generate the reticular high-temperature resistant phenolic resin under the action of the alkaline catalyst; the wood tar has certain foaming performance, and the foaming performance is optimized under the action of high temperature, so that the wood tar forms a continuous pore structure in a stratum, and the flow of crude oil in the stratum is facilitated.
In summary, the main advantages of the present invention are: the chemical sand control agent is prepared by using cheap wood tar as a raw material, and the preparation process is simple; the prepared chemical sand control agent has good temperature resistance, can be cemented with sand grains into a honeycomb-shaped solidified body at the high temperature of 230-400 ℃, the pressure resistance can reach more than 8MPa, and the gas permeability can reach 6 mu m 2 The sand control agent is suitable for thick oil thermal recovery sand control.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
The specific indexes of the wood tar used in each example were: the density at 20 ℃ is 1.07g/cm 3 The oxygen content was 38.1%, and the viscosity at 50 ℃ was 1980 mPas.
The preparation method of the consolidated body comprises the following steps of weighing quartz sand and a wood tar chemical sand control agent according to a certain mass ratio, uniformly mixing, transferring into a glass tube with the diameter of 2.5cm and the length of 7cm, compacting until the sand surface is constant, putting into an autoclave filled with a proper amount of water, putting the autoclave into a heating furnace at a certain temperature, solidifying for a certain time, taking out, cooling to room temperature, opening the autoclave, and breaking the glass tube to obtain the consolidated body. And then cutting the consolidated body into consolidated body samples with the diameter of 2.5 +/-0.1 cm and the length of 2.5 +/-0.1 cm by using a core cutter for measuring the compressive strength and the permeability of the consolidated body samples. The mass ratio of the wood tar chemical sand control agent to sand grains is 1:4-9, preferably 1:4-6, the temperature of the heating furnace is 230-400 ℃, preferably 260-350 ℃, and the consolidation time is 2-6 hours, preferably 4-6 hours.
Example 1
Preparing a sodium hydroxide solution with the mass concentration of 20% and a formaldehyde solution with the mass concentration of 30%, weighing 10g of wood tar in a 200mL beaker, slowly adding 5g of the sodium hydroxide solution into the beaker, stirring the mixture at the same time until the mixture is uniformly mixed, slowly adding 3.3g of the formaldehyde solution with the mass concentration of 30% into the mixed solution for reaction, and stirring the mixture at the same time to obtain a corresponding reaction product; finally, 15g of tap water is added into the reaction product and stirred evenly, and the wood tar chemical sand prevention agent A is obtained 1 . The whole process is controlled in a thermostatic water bath at 50 ℃.
Example 2
Preparing a potassium hydroxide solution with the mass concentration of 20% and a trioxymethylene solution with the mass concentration of 30%, weighing 10g of wood tar in a 200mL beaker, slowly adding 10g of the potassium hydroxide solution into the beaker, stirring the mixture at the same time until the mixture is uniformly mixed, slowly adding 6.7g of the trioxymethylene solution with the mass concentration of 30% into the mixed solution for reaction, and stirring the mixture at the same time to obtain a corresponding reaction product; finally, 23.3g of tap water is added into the reaction product and stirred evenly to obtain the wood tar chemical sand control agent A 2 . The whole process is controlled to be carried out in a constant temperature water bath at 30 ℃.
Example 3
Preparing a potassium hydroxide solution with the mass concentration of 20% and a paraformaldehyde solution with the mass concentration of 30%, weighing 10g of wood tar in a 200mL beaker, slowly adding 7.0g of a sodium hydroxide solution into the beaker, stirring the mixture at the same time until the mixture is uniformly mixed, slowly adding 11g of the paraformaldehyde solution with the mass concentration of 30% into the mixed solution for reaction, and stirring the mixture at the same time to obtain the wood tar chemical sand control agent A 3 . The whole process is controlled to be carried out in a constant-temperature water bath at 40 ℃.
Example 4
Preparing a sodium hydroxide solution with the mass concentration of 20%, a formaldehyde solution with the mass concentration of 30% and a phenol solution with the mass concentration of 20% (the solvent is a 10% sodium hydroxide aqueous solution), weighing 10g of wood tar in a 200mL beaker, slowly adding 5g of the sodium hydroxide solution into the beaker, stirring the mixture at the same time until the mixture is uniformly mixed, slowly adding 3.3g of the formaldehyde solution with the mass concentration of 30% into the mixed solution for reaction, and stirring the mixture at the same time to obtain a corresponding reaction product; adding 15g of tap water into the reaction product, uniformly stirring, finally adding 3.3g of prepared sodium hydroxide aqueous solution of phenol, and uniformly stirring to obtain the wood tar chemical sand control agent A 4 . The whole process is controlled in a thermostatic water bath at 50 ℃.
EXAMPLE 5 preparation of consolidated bodies
Weighing 40g of 4 parts of 120-mesh quartz sand, and respectively adding 10g of the wood tar chemical sand control agent A 1 ～A 4 After being mixed evenly, the mixture is transferred into a glass tube with the diameter of 2.5cm and the length of 7cm, compacted until the sand surface is constant, put into an autoclave with proper amount of water, then the autoclave is put into a heating furnace at 300 ℃, cured for 4 hours, taken out and cooled to room temperature, the autoclave is opened, and the glass tube is broken, thus obtaining a consolidated body B 1 ～B 4 . And then cutting the consolidated body into consolidated body samples with the diameter of 2.5 +/-0.1 cm and the length of 2.5 +/-0.1 cm by using a core cutter for measuring the compressive strength and the permeability of the consolidated body samples.
EXAMPLE 6 preparation of the consolidated body
Weighing 40g of 2 parts of 120-mesh quartz sand, and respectively adding 10g of the wood tar chemical sand control agent A 1 After being mixed evenly, the mixture is transferred into a glass tube with the diameter of 2.5cm and the length of 7cm, compacted until the sand surface is constant, put into an autoclave with proper amount of water, then the autoclave is respectively put into heating furnaces with the temperature of 260 ℃ and 350 ℃, solidified for 4 hours, taken out and cooled to the room temperature, the autoclave is opened, and the glass tube is broken into pieces, thus obtaining a solidified body B 5 、B 6 . And then cutting the consolidation body into consolidation body samples with the diameter of 2.5 +/-0.1 cm and the length of 2.5 +/-0.1 cm by using a core cutting machine for measuring the compressive strength and the permeability of the consolidation body samples.
EXAMPLE 7 preparation of the consolidated body
Weighing 42.9g of 1 part of 120-mesh quartz sand, and adding 7.1g of the wood tar chemical sand control agent A 1 After being mixed evenly, the mixture is transferred into a glass tube with the diameter of 2.5cm and the length of 7cm, compacted until the sand surface is constant, put into an autoclave with proper amount of water, then the autoclave is respectively put into a heating furnace with the temperature of 300 ℃, solidified for 4 hours, taken out and cooled to the room temperature, the autoclave is opened, and the glass tube is broken, thus obtaining a consolidated body B 7 . And then cutting the consolidated body into consolidated body samples with the diameter of 2.5 +/-0.1 cm and the length of 2.5 +/-0.1 cm by using a core cutter for measuring the compressive strength and the permeability of the consolidated body samples.
EXAMPLE 8 preparation of the consolidated body
Weighing 40g of 1 part of 120-mesh quartz sand, and adding 10g of the wood tar chemical sand control agent A 1 After being mixed evenly, the mixture is transferred into a glass tube with the diameter of 2.5cm and the length of 7cm, compacted until the sand surface is constant, the mixture is put into an autoclave filled with proper amount of water, the autoclave is put into a heating furnace with the temperature of 300 ℃, cured for 6 hours, taken out and cooled to the room temperature, the autoclave is opened, and the glass tube is broken, thus obtaining a consolidated body B 8 . And then cutting the consolidated body into consolidated body samples with the diameter of 2.5 +/-0.1 cm and the length of 2.5 +/-0.1 cm by using a core cutter for measuring the compressive strength and the permeability of the consolidated body samples.
Comparative example 1
Weighing 40g of 120-mesh quartz sand 1, adding 10g of the resin combined sand control agent C1 prepared in 201310184669.6 patent example 1, uniformly mixing, transferring into a glass tube with the diameter of 2.5cm and the length of 7cm, compacting until the sand surface is constant, putting into an autoclave filled with a proper amount of water, putting the autoclave into a heating furnace at 300 ℃, curing for 4 hours, taking out, cooling to room temperature, opening the autoclave, and breaking the glass tube to obtain a solidified body D1. And then cutting the consolidated body into consolidated body samples with the diameter of 2.5 +/-0.1 cm and the length of 2.5 +/-0.1 cm by using a core cutter for measuring the compressive strength and the permeability of the consolidated body samples.
Comparative example 2
Weighing 40g of 120-mesh quartz sand, adding 10g of common phenolic resin sand control agent C2 (2123 phenolic resin, wuxi Xin She Hao chemical industry Co., ltd.) used in the field of sand control in oil fields, uniformly mixing, transferring into a glass tube with the diameter of 2.5cm and the length of 7cm, compacting until the sand surface is constant, putting into an autoclave with appropriate amount of water, putting the autoclave into a heating furnace at 300 ℃, curing for 4h, taking out, cooling to room temperature, opening the autoclave, and breaking the glass tube to obtain a solidified body D2. And then cutting the consolidated body into consolidated body samples with the diameter of 2.5 +/-0.1 cm and the length of 2.5 +/-0.1 cm by using a core cutter for measuring the compressive strength and the permeability of the consolidated body samples.
Comparative example 3
The sand control agent was prepared according to the method of example 1, except that the wood tar was changed to phenol of the same quality.
Preparing a sodium hydroxide solution with the mass concentration of 20% and a formaldehyde solution with the mass concentration of 30%, weighing 10g of phenol in a 200mL beaker, slowly adding 5g of the sodium hydroxide solution into the beaker, stirring the sodium hydroxide solution and the formaldehyde solution until the sodium hydroxide solution and the formaldehyde solution are uniformly mixed, slowly adding 3.3g of the formaldehyde solution with the mass concentration of 30% into the mixed solution for reaction, and stirring the mixed solution to obtain a corresponding reaction product; and finally, adding 15g of tap water into the reaction product, and uniformly stirring to obtain the phenolic resin chemical sand control agent C3. The consolidated body D3 was prepared according to the method of example 5, and then cut into a consolidated body sample having a diameter of 2.5. + -. 0.1cm and a length of 2.5. + -. 0.1cm using a core cutter for measuring the compressive strength and permeability thereof.
Example 9 testing of Properties of consolidated body samples
The compressive strength and the permeability of the consolidation body sample are implemented according to the China Petroleum and Natural gas industry Standard SY/T5276-2000 determination of rupture strength, compressive strength and gas permeability of chemical sand control artificial rock core. The results are shown in Table 1.
As can be seen from the table 1, the chemical sand control agent prepared by the invention has good temperature resistance, can be cemented with sand grains into a honeycomb-shaped solidified body at the high temperature of 230-400 ℃, has the pressure resistance of more than 8MPa and the gas permeability of more than 6 mu m < 2 >, and is suitable for thick oil thermal recovery sand control.
TABLE 1
Claims (10)
1. A preparation method of a wood tar chemical sand prevention agent is characterized in that wood tar and aldehyde are contacted and reacted in an alkaline aqueous solution to obtain the wood tar chemical sand prevention agent, wherein the mass ratio of the aldehyde to the wood tar is 1:3-15, and the reaction temperature is 20-60 ℃; adding water into the wood tar chemical sand prevention agent, controlling the wood tar sand prevention agent to account for 20-40% of the mass fraction of the wood tar raw material in the whole reaction system, adding a phenol solution, wherein the used solvent is a 5-30% sodium hydroxide or potassium hydroxide aqueous solution, and the mass ratio of the phenol to the wood tar chemical sand prevention agent is 1-10.
2. The method according to claim 1, wherein said wood tar has a density of 0.97 to 1.20g/cm 3 The oxygen content is 35-60%, and the viscosity is 5000 mPas or less.
3. The method of claim 1, wherein the aldehyde is selected from one or more of formaldehyde, paraformaldehyde, and trioxymethylene.
4. The method according to claim 1, wherein the mass ratio of aldehyde to wood tar is 1:3-10.
5. The method according to claim 1, wherein the basic aqueous solution contains a basic substance selected from one or two of sodium hydroxide, potassium hydroxide, ammonia water, sodium carbonate, potassium carbonate and sodium bicarbonate.
6. The method according to claim 1, wherein the mass ratio of alkaline substance to wood tar is 1:5 to 25.
7. The method according to claim 1, wherein the mass ratio of alkaline substance to wood tar is 1:5 to 10.
8. The process according to claim 1, wherein the reaction temperature is 30 to 50 ℃.
9. The method according to claim 1, wherein the mass ratio of the phenol to the wood tar chemical sand control agent is 1.
10. The method according to claim 1, wherein the phenol solution has a mass concentration of 5 to 30%.
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| BR9903224B1 (en) * | 1999-07-19 | 2011-01-25 | phenolic adhesives production process. | |
| CN101987948A (en) * | 2009-08-03 | 2011-03-23 | 北京化工大学 | Method for producing phenolic resin adhesive |
| CN102311727B (en) * | 2011-05-30 | 2013-07-10 | 中国石油天然气股份有限公司 | Temperature-resistant phenolic resin sand control agent and preparation method and application thereof |
| CN102558468B (en) * | 2011-12-29 | 2013-07-17 | 浙江省林业科学研究院 | Bamboo/wood tar-furfural thermosetting resin and preparation method thereof |
| CN103305201B (en) * | 2013-05-17 | 2015-11-18 | 中国石油天然气股份有限公司 | Heavy crude heat extraction horizontal well resin sand control agent and preparation method thereof and application |
| CN109609111B (en) * | 2018-12-27 | 2021-04-06 | 长江大学 | Wood tar resin sand consolidation agent and preparation method and application thereof |
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