CN111852362A - Chemical sand prevention method for heavy oil thermal recovery - Google Patents
Chemical sand prevention method for heavy oil thermal recovery Download PDFInfo
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- CN111852362A CN111852362A CN201910350352.2A CN201910350352A CN111852362A CN 111852362 A CN111852362 A CN 111852362A CN 201910350352 A CN201910350352 A CN 201910350352A CN 111852362 A CN111852362 A CN 111852362A
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- Prior art keywords
- sand control
- sand
- wood tar
- solution
- control agent
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- 239000004576 sand Substances 0.000 title claims abstract description 156
- 239000000126 substance Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000011084 recovery Methods 0.000 title claims abstract description 13
- 230000002265 prevention Effects 0.000 title claims description 28
- 239000000295 fuel oil Substances 0.000 title abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 73
- 238000004140 cleaning Methods 0.000 claims abstract description 26
- 238000007711 solidification Methods 0.000 claims abstract description 8
- 230000008023 solidification Effects 0.000 claims abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 69
- 239000011276 wood tar Substances 0.000 claims description 53
- 239000000243 solution Substances 0.000 claims description 40
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 19
- 239000007864 aqueous solution Substances 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 15
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 10
- 239000003513 alkali Substances 0.000 claims description 9
- 239000004094 surface-active agent Substances 0.000 claims description 9
- 239000002904 solvent Substances 0.000 claims description 8
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 7
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 7
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- BGJSXRVXTHVRSN-UHFFFAOYSA-N 1,3,5-trioxane Chemical group C1OCOCO1 BGJSXRVXTHVRSN-UHFFFAOYSA-N 0.000 claims description 4
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 claims description 4
- 229930040373 Paraformaldehyde Natural products 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 4
- 229920002866 paraformaldehyde Polymers 0.000 claims description 4
- RZXLPPRPEOUENN-UHFFFAOYSA-N Chlorfenson Chemical compound C1=CC(Cl)=CC=C1OS(=O)(=O)C1=CC=C(Cl)C=C1 RZXLPPRPEOUENN-UHFFFAOYSA-N 0.000 claims description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 2
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 claims description 2
- 159000000011 group IA salts Chemical class 0.000 claims description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 2
- 239000002736 nonionic surfactant Substances 0.000 claims description 2
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 claims 3
- 150000007529 inorganic bases Chemical class 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 34
- 238000010276 construction Methods 0.000 abstract description 19
- 230000035699 permeability Effects 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 7
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 145
- 238000004519 manufacturing process Methods 0.000 description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 25
- 238000003756 stirring Methods 0.000 description 20
- 238000010793 Steam injection (oil industry) Methods 0.000 description 19
- 239000000203 mixture Substances 0.000 description 17
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 15
- 229920001568 phenolic resin Polymers 0.000 description 15
- 239000005011 phenolic resin Substances 0.000 description 15
- 239000011521 glass Substances 0.000 description 14
- 238000005303 weighing Methods 0.000 description 12
- 239000003129 oil well Substances 0.000 description 11
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 10
- 239000007795 chemical reaction product Substances 0.000 description 10
- 239000008098 formaldehyde solution Substances 0.000 description 10
- 238000002156 mixing Methods 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 8
- 239000006004 Quartz sand Substances 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 7
- 239000011259 mixed solution Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 150000001299 aldehydes Chemical class 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000007596 consolidation process Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000008399 tap water Substances 0.000 description 5
- 235000020679 tap water Nutrition 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- UBESITQVAPQMMN-UHFFFAOYSA-N 2-dodecylphenol;sodium Chemical compound [Na].CCCCCCCCCCCCC1=CC=CC=C1O UBESITQVAPQMMN-UHFFFAOYSA-N 0.000 description 2
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000007849 furan resin Substances 0.000 description 2
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- UEZVMMHDMIWARA-UHFFFAOYSA-N Metaphosphoric acid Chemical compound OP(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-N 0.000 description 1
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N N-phenyl amine Natural products NC1=CC=CC=C1 PAYRUJLWNCNPSJ-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
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- -1 aniline modified phenolic resin Chemical class 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000009671 shengli Substances 0.000 description 1
- LGORLCOUTMVEAC-UHFFFAOYSA-M sodium;2-nonylphenolate Chemical compound [Na+].CCCCCCCCCC1=CC=CC=C1[O-] LGORLCOUTMVEAC-UHFFFAOYSA-M 0.000 description 1
- 239000000375 suspending agent Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Classifications
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
-
- 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
-
- 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
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- 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
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a chemical sand control method for heavy oil thermal recovery, which mainly comprises the following steps: injecting a front cleaning solution into a sand outlet well; injecting a chemical sand control agent; injecting steam for oil displacement; and fourthly, well closing solidification. The sand control method directly utilizes the steam temperature in the heavy oil thermal recovery to carry out cementation and solidification on the sand control agent and the formation sand to form a sand control solidified body with high permeability, realizes effective sand control, does not need a curing agent and a pore-increasing agent, and has simple construction process and good sand control effect.
Description
Technical Field
The invention relates to a chemical sand prevention method for heavy oil thermal recovery, which 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 sand production of the oil well, on one hand, well cementation and completion modes are selected correctly according to the oil layer and the 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, domestic sand control technologies comprise mechanical sand control, chemical sand control and composite sand control technologies. 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 agents with good application effects at home and abroad mainly comprise sand control agents such as phenolic resin, modified furan resin and urea resin, the sand control effect is improved by firstly injecting pretreatment agents such as organic solvents and surfactant aqueous solutions in the construction process, or polymerizable monomers are injected into a stratum, underground synthetic resin is used for sand control construction, or the phenolic resin is coated on the surface of sand, so that an artificial well wall with certain strength and permeability is formed in a near-well zone, and the aim of sand control is fulfilled.
CN103305201B discloses a resin sand control agent for a thickened oil thermal recovery horizontal well, which is suitable for the production conditions of the thickened 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.
CN101519587A discloses a chemical resin type sand consolidation agent for an oil-water well and a sand control process technology, and the formula is as follows: 5-10% of organic silicon resin, 15-20% of a dispersing agent (furfural), 10-15% of an mutual solvent (acetaldehyde), 10-15% of a curing agent (metaphosphoric acid), 15-20% of a demulsifier, 15-20% of aniline modified phenolic resin, 25-30% of hydrochloric acid, 5-10% of triethanolamine, 5-10% of aluminum sulfate, and OP 10: 5 to 10 percent. The process comprises the steps of flushing sand to a position required by design, putting a construction pipe column according to the design requirement, pretreating an oil layer, selecting a resin type sand consolidation agent to be replaced, extruding the resin type sand consolidation agent and an extrusion displacement liquid, slowly lifting out the construction pipe column after the pressure is naturally diffused, and finally completing the well after the waiting for setting for 72 hours.
CN102226388B discloses a sand control construction process using water to dilute and carry phenolic resin: mixing the phenolic resin sand control agent with suspending agents such as light calcium carbonate, glycerol, diesel oil and/or kerosene to obtain a premix, then mixing the premix with water to obtain a phenolic resin suspension, and injecting the phenolic resin suspension into a stratum to perform sand control construction operation. The construction process can increase the solidification treatment radius of the phenolic resin sand control agent to the stratum, and eliminates the risk of blocking the stratum easily caused by directly using the phenolic resin for sand control construction. The chemical sand control agent and the sand control method have good sand control effect, but the application range is limited, the formula of the sand control agent is complex, the cost of raw materials is high, and the construction process is complex.
Disclosure of Invention
Aiming at the technical defects, the invention provides a chemical sand prevention method for heavy oil thermal recovery, which has the advantages of high sand prevention efficiency, low construction cost and the like.
The thickened oil thermal recovery sand prevention method comprises the following steps: injecting a front cleaning solution into a sand outlet well; injecting a chemical sand control agent; injecting steam for oil displacement; and fourthly, well closing solidification.
The pre-cleaning solution is a mixed aqueous solution of alkali and a surfactant, wherein the alkali is selected from one or more of sodium hydroxide, potassium hydroxide, lithium hydroxide, sodium carbonate, potassium carbonate, ethylenediamine, dimethylamine and diethylamine; the surfactant is an anionic-nonionic surfactant, preferably C6-C20Alkyl phenol polyoxyethylene ether sulfonate, C6-C20One or more of alkylphenol polyoxyethylene ether sulfate. Wherein, the alkali liquorThe mass concentration of (A) is 0.1 to 2.0%, preferably 0.3 to 1.0%, and the mass concentration of the surfactant solution is 0.1 to 2.0%, preferably 0.3 to 0.5%.
The chemical sand control agent can be a chemical sand control agent used in the prior art, such as a phenolic resin sand control agent and the like, and preferably a wood tar chemical sand control agent.
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 density of the wood tar is 0.97-1.20 g/cm3(20 ℃) an oxygen content of 35 to 60% and a viscosity of 5000 mPas or less (50 ℃).
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 one or two of inorganic alkali and alkaline salt, such as 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: 5-25, preferably 1: 5 to 10. The mass concentration of the alkaline aqueous solution is 10-20%.
The reaction temperature is 20-60 ℃, and preferably 30-50 ℃.
The reaction pressure is normal pressure.
The reaction time is 20-60 min, preferably 30-60 min.
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 amount 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 (5-30%, preferably 10-20% aqueous solution of sodium hydroxide or potassium hydroxide) with a mass concentration of 5-30%, preferably 10-20% 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 prevention agent is 1: 10-25, and preferably 1: 15-20.
And injecting the steam for oil displacement and closing the well for solidification according to the conventional process parameters of the oil field site.
In summary, the main advantages of the present invention are:
the alkali liquor in the preposed cleaning solution can remove inorganic impurities on the surface of sand grains, can be used as an alkaline catalyst required by the synthesis of a subsequent chemical sand control agent, and can generate a certain emulsification synergistic effect with a surfactant;
Secondly, the surfactant in the pre-cleaning solution mainly plays a role in cleaning crude oil and organic sediments on the surface of sand grains, changing the wettability of the surface of the sand grains and promoting the sand prevention agent to be adsorbed on the surface of the sand grains;
the preposed cleaning solution is resistant to high-temperature washing and has good compatibility with the wood tar chemical sand prevention agent;
the chemical wood tar sand prevention agent is used for performing thickened oil thermal recovery sand prevention, the preparation process of the chemical wood tar sand prevention agent is simple, the cost is low, the chemical wood tar sand prevention agent and sand grains can be cemented into a honeycomb-shaped consolidated body at high temperature (260-350 ℃), and the pressure resistance, the permeability and the temperature resistance are good;
the sand control process directly utilizes the steam temperature in the heavy oil thermal recovery to carry out cementation and solidification on the sand control agent and the formation sand to form a sand control solidified body with high permeability, thereby achieving the purpose of effective sand control, needing no curing agent and pore-increasing agent, having simple construction process and good sand control effect.
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 are as follows: the density at 20 ℃ is 1.07g/cm 3The 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 solidification time is 2-6 hours, preferably 4-6 hours.
In the field embodiment, the dosage of the preposed cleaning solution is calculated according to the following method: selecting a thickened oil steam huff-puff well with certain oil layer thickness and porosity for sand prevention construction, designing a sand prevention treatment radius, and using the sand prevention agent according to a formula Q ═ Pi R2H ψ calculation, where R is the treatment radius (m), H is the oil layer thickness (m), ψ is the oil layer porosity (%), and the amount of the pre-cleaning liquid was 0.3Q.
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 obtained1. 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 A2. The whole process is controlled to be carried out in a constant temperature water bath at 30 ℃.
Example 3
Preparing 20% by mass of potassium hydroxide solution and 30% by mass of paraformaldehyde solution, weighing 10g of wood tar in a 200mL beaker, slowly adding 7.0g of sodium hydroxide solution into the beaker, stirring the mixture simultaneously until the mixture is uniformly mixed, slowly adding 11g of 30% by mass of paraformaldehyde solution into the mixed solution for reaction, and stirring the mixture uniformly 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 A4. The whole process is controlled in a thermostatic water bath at 50 ℃.
EXAMPLE 5 preparation of the consolidated body
Weighing 40g of 4 parts of 120-mesh quartz sand, and respectively adding 10g of the wood tar chemical sand control agent A1～A4After mixing uniformly, the mixture is transferred to a straight lineCompacting in a glass tube with diameter of 2.5cm and length of 7cm until sand surface is constant, placing in an autoclave filled with appropriate amount of water, placing the autoclave in a heating furnace at 300 deg.C, curing for 4 hr, taking out, cooling to room temperature, opening the autoclave, and breaking the glass tube to obtain a consolidated body B 1～B4. 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 A1After 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 B5、B6. 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 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 A1After 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 A1Mixing, transferring into glass tube with diameter of 2.5cm and length of 7cm, compacting until sand surface is constant, and placing into autoclave filled with appropriate amount of waterThen placing the high-pressure autoclave in a heating furnace at 300 ℃, curing for 6h, taking out, cooling to room temperature, opening the high-pressure autoclave, and breaking the glass tube to obtain a solidified body B8. 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 part, adding 10g of the resin combined sand control agent C1 prepared in patent 201310184669.6 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 consolidated 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 Yehao chemical 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 a proper 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 consolidated 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. A consolidated body D3 was prepared according to the method of example 5, and then the consolidated body was cut into a consolidated body sample having a diameter of 2.5. + -. 0.1cm and a length of 2.5. + -. 0.1cm by 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 executed according to the China Petroleum and gas industry Standard SY/T5276-2000 determination of the rupture strength, the compressive strength and the gas permeability of the chemical sand control artificial 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 a high temperature of 230-400 ℃, has the pressure resistance of more than 8MPa and the gas permeability of more than 6 mu m2, and is suitable for thick oil thermal recovery sand control.
TABLE 1
| Consolidation body | Compressive strength/MPa | Permeability/μm2 |
| B1 | 8.1 | 5.3 |
| B2 | 7.6 | 4.9 |
| B3 | 7.5 | 5.2 |
| B4 | 8.6 | 6.4 |
| B5 | 8.0 | 5.1 |
| B6 | 8.0 | 5.3 |
| B7 | 7.7 | 4.8 |
| B8 | 8.3 | 5.5 |
| D1 | 5.0 | 2.2 |
| D2 | 1.0 | 2.0 |
| D3 | 6.0 | 4.5 |
EXAMPLE 10 in situ preparation of chemical Sand control agent for Wood Tar
200kg of wood tar (density 1.07g/cm at 20 ℃) was added to a 1-cube reaction vessel equipped with a stirring device3The oxygen content is 38.1 percent, the viscosity at 50 ℃ is 1980mPa & s), then 100kg of sodium hydroxide solution (the mass concentration is 20 percent, the solvent is water transported outside the oil field united station) is added while stirring until the mixture is uniformly mixed, then 66kg of formaldehyde solution (the mass concentration is 30 percent, the solvent is water transported outside the oil field united station) is added and stirred until the reaction is complete (about 1 hour), finally 300kg of water transported outside the oil field united station is added and stirred uniformly, and the wood tar chemical sand-preventing agent is obtained.
EXAMPLE 11 in situ preparation of chemical Sand control agent for Wood Tar
200kg of wood tar (density 1.07g/cm at 20 ℃) was added to a 1-cube reaction vessel equipped with a stirring device3The oxygen content is 38.1 percent, the viscosity at 50 ℃ is 1980mPa & s), then, while stirring, adding 100kg of sodium hydroxide solution (the mass concentration is 20 percent, the solvent is water transported outside the oil field united station) until the mixture is uniformly mixed, then adding 66kg of formaldehyde solution (the mass concentration is 30 percent, the solvent is water transported outside the oil field united station), stirring until the reaction is complete (about 1 hour), then adding 300kg of water transported outside the oil field united station, stirring uniformly, finally adding 66kg of phenol solution (the mass concentration is 20 percent, the solvent is 10 percent of sodium hydroxide solution), and stirring until the reaction is complete, thus obtaining the wood tar chemical sand control agent.
Example 12 Sand control construction method for Henan oilfield on site
The sand production of a steam huff-puff well-1 in the Henan oilfield is serious, the pump detection period caused by the sand production is 30 days, the effective oil layer thickness of the well is 40m, the porosity is 32%, the designed sand prevention treatment radius is 1.5m, and the dosage of the wood tar chemical sand prevention agent is 90m3The dosage of the pre-cleaning liquid is 27 tons. Firstly, 27 tons of pre-cleaning solution (sodium hydroxide mass concentration of 0.3%, sodium dodecyl phenol polyoxyethylene ether sulfate mass concentration of 0.5%) was injected, and then 90m of pre-cleaning solution was injected 3The wood tar chemical sand control agent in the implementation 10 is injected with high-temperature high-pressure saturated steam, and relevant steam injection parameters are as follows: steam dryness of 70%, steam injection strength of 80t/m, steam injection speed of 150t/d, steam injection pressure of 12MPa, and totalThe amount of steam injected was 2397 t. And finally, after the well is stewed and solidified for 5 days, putting the oil well into production. After the sand control operation, the pump inspection period caused by sand production is 323 days.
Example 13 Sand control construction method in Shengli oilfield
The sand production of a steam huff-puff well in a victory oil field is serious, the pump detection period caused by the sand production is 36 days, the effective oil layer thickness of the well is 28m, the porosity is 35 percent, the designed sand control treatment radius is 1.3m, and the dosage of the wood tar chemical sand control agent is 52m3The dosage of the preposed cleaning solution is 15.6 tons. Firstly, 15.6 tons of pre-cleaning liquid (sodium hydroxide mass concentration is 0.5%, sodium nonylphenol polyoxyethylene ether sulfonate mass concentration is 0.5%) is injected, and then 52m of pre-cleaning liquid is injected3The wood tar chemical sand control agent in the embodiment 11 is injected with high-temperature high-pressure saturated steam, and the relevant steam injection parameters are as follows: the steam dryness is 50 percent, the steam injection strength is 90t/m, the steam injection speed is 130t/d, the steam injection pressure is 12MPa, and the total steam injection amount is 1798 t. And finally, after the well is stewed and solidified for 3 days, putting the oil well into production. After the sand control operation, the pump detection period caused by sand production is 368 days.
Comparative example 4 sand control construction method for Henan oilfield on site
The sand production of a certain steam huff-puff well-2 in the Henan oilfield is serious, the pump detection period caused by the sand production is 40 days, the effective oil layer thickness of the well is 25m, the porosity is 30%, the designed sand prevention treatment radius is 1.5m, and the consumption of the wood tar chemical sand prevention agent is 53m3The dosage of the preposed cleaning solution is 15.9 tons. First, 15.9 tons of a pre-cleaning solution (sodium hydroxide mass concentration of 0.3%, sodium dodecylphenol polyoxyethylene ether sulfate mass concentration of 0.5%) was poured in, and then 53m of a pre-cleaning solution was poured in3Ordinary phenolic resin sand control agent (2123 phenolic resin, wuxinye hao chemical limited) that the oil field sand control field used then injects high temperature high pressure saturated steam, and relevant steam injection parameter is: the steam dryness is 70 percent, the steam injection strength is 80t/m, the steam injection speed is 150t/d, the steam injection pressure is 12MPa, and the total steam injection amount is 2100 t. And finally, after the well is stewed and solidified for 5 days, putting the oil well into production. After the sand control operation, the pump inspection period caused by sand production is 108 days.
Comparative example 5 Henan oilfield on-site sand prevention construction method
The sand production of a certain steam huff-puff well-3 in the Henan oilfield is serious, the pump detection period caused by the sand production is 45 days, the effective oil layer thickness of the well is 38m, the porosity is 30%, the designed sand prevention treatment radius is 1.5m, and the calculated dosage of the wood tar chemical sand prevention agent is 80.5m 3The dosage of the pre-cleaning liquid is 24 tons. First, 24 tons of a pre-cleaning solution (5% by mass of a cleaning solution for oil layer of Shanpu SP-105, Shandong Industrial cleaning Water treatment Co., Ltd., containing no alkali) was injected, and 80.5m of a pre-cleaning solution was further injected3The wood tar chemical sand control agent in the embodiment 1 is injected with high-temperature high-pressure saturated steam, and relevant steam injection parameters are as follows: the steam dryness is 70 percent, the steam injection strength is 80t/m, the steam injection speed is 150t/d, the steam injection pressure is 12MPa, and the total steam injection amount is 2250 t. And finally, after the well is stewed and solidified for 5 days, putting the oil well into production. After the sand control operation, the pump detection period caused by sand production is 208 days.
Claims (13)
1. A thickened oil thermal recovery sand control method comprises the following steps: injecting a front cleaning solution into a sand outlet well; injecting a chemical sand control agent; injecting steam for oil displacement; fourthly, well closing solidification; the pre-cleaning solution is a mixed aqueous solution of alkali and a surfactant.
2. The method according to claim 1, wherein the alkali is selected from one or more of sodium hydroxide, potassium hydroxide, lithium hydroxide, sodium carbonate, potassium carbonate, ethylenediamine, dimethylamine and diethylamine; preferably, the mass concentration of the alkali liquor is 0.1-2.0%, preferably 0.3-1.0%.
3. The method according to claim 1, wherein the surfactant is an anionic-nonionic surfactant, preferably C6-C20Alkyl phenol polyoxyethylene ether sulfonate, C6-C20One or more of alkylphenol polyoxyethylene ether sulfate; preferably, the mass concentration of the surfactant solution is 0.1-2.0%, preferably 0.3-0.5%.
4. The method according to claim 1, wherein the chemical sand control agent is preferably a wood tar chemical sand control agent, and the preparation method 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.
5. The method according to claim 4, wherein said wood tar has a density of 0.97 to 1.20g/cm3(20 ℃) an oxygen content of 35 to 60% and a viscosity of 5000 mPas or less (50 ℃).
6. The method of claim 4, wherein the aldehyde is selected from one or more of formaldehyde, paraformaldehyde, and trioxymethylene.
7. The method according to claim 4, wherein the mass ratio of aldehyde to wood tar is 1:3 to 15, preferably 1:3 to 10.
8. The method according to claim 4, wherein the alkaline aqueous solution contains an alkaline substance selected from the group consisting of inorganic bases and alkaline salts.
9. The method according to claim 4, wherein the mass ratio of alkaline substance to wood tar is 1: 5-25, preferably 1: 5 to 10.
10. A process according to claim 4, wherein the reaction temperature is 20 to 60 ℃, preferably 30 to 50 ℃.
11. The method according to claim 4, wherein a 5-30%, preferably 10-20% phenol solution by mass concentration is added to the wood tar chemical sand control agent.
12. The process according to claim 11, wherein the solvent in the phenol solution is 5 to 30%, preferably 10 to 20% aqueous sodium hydroxide or potassium hydroxide solution.
13. The method according to claim 11, wherein the mass ratio of the phenol to the wood tar chemical sand control agent is 1: 10-25, preferably 1: 15-20.
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| CN116378600A (en) * | 2023-06-06 | 2023-07-04 | 新疆能通能原石油工程有限公司 | Oil layer reconstruction plugging method |
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