CN116606637A - Liquid bridge plug and preparation method thereof - Google Patents
Liquid bridge plug and preparation method thereof Download PDFInfo
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- CN116606637A CN116606637A CN202310899456.5A CN202310899456A CN116606637A CN 116606637 A CN116606637 A CN 116606637A CN 202310899456 A CN202310899456 A CN 202310899456A CN 116606637 A CN116606637 A CN 116606637A
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- 239000007788 liquid Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical class O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 73
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 239000008367 deionised water Substances 0.000 claims abstract description 59
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 59
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 38
- 229920000642 polymer Polymers 0.000 claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 24
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 19
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 19
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000008117 stearic acid Substances 0.000 claims abstract description 19
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 18
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 18
- VZWMKHUMEIECPK-UHFFFAOYSA-M benzyl-dimethyl-octadecylazanium;bromide Chemical compound [Br-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 VZWMKHUMEIECPK-UHFFFAOYSA-M 0.000 claims abstract description 17
- QNILTEGFHQSKFF-UHFFFAOYSA-N n-propan-2-ylprop-2-enamide Chemical compound CC(C)NC(=O)C=C QNILTEGFHQSKFF-UHFFFAOYSA-N 0.000 claims abstract description 16
- YAXXOCZAXKLLCV-UHFFFAOYSA-N 3-dodecyloxolane-2,5-dione Chemical compound CCCCCCCCCCCCC1CC(=O)OC1=O YAXXOCZAXKLLCV-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011954 Ziegler–Natta catalyst Substances 0.000 claims abstract description 13
- 239000004094 surface-active agent Substances 0.000 claims abstract description 9
- 239000002562 thickening agent Substances 0.000 claims abstract description 9
- 239000003054 catalyst Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims description 96
- 238000002156 mixing Methods 0.000 claims description 49
- 239000000463 material Substances 0.000 claims description 42
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 38
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 34
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 27
- 238000001035 drying Methods 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 26
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 18
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 18
- 238000005406 washing Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 12
- 229920002401 polyacrylamide Polymers 0.000 claims description 11
- 230000032683 aging Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 9
- 238000007873 sieving Methods 0.000 claims description 9
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 9
- 238000000967 suction filtration Methods 0.000 claims description 9
- 230000007062 hydrolysis Effects 0.000 claims description 2
- 238000006460 hydrolysis reaction Methods 0.000 claims description 2
- 239000004971 Cross linker Substances 0.000 claims 1
- 239000004925 Acrylic resin Substances 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000005461 lubrication Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 52
- 230000000052 comparative effect Effects 0.000 description 15
- 239000010410 layer Substances 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000011229 interlayer Substances 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910021485 fumed silica Inorganic materials 0.000 description 3
- 238000010297 mechanical methods and process Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 1
- -1 alkyl glucoside Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229930182478 glucoside Natural products 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012782 phase change material Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/5045—Compositions based on water or polar solvents containing inorganic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/18—Bridging agents, i.e. particles for temporarily filling the pores of a formation; Graded salts
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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)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a liquid bridge plug and a preparation method thereof, and relates to the technical field of lubrication and sealing. The liquid bridge plug comprises a polymer, a cross-linking agent, a catalyst, a curing agent, a thickening agent, a surfactant and deionized water; wherein the polymer adopts polyacrylic resin, the cross-linking agent adopts polyethylene glycol and N-isopropyl acrylamide, the catalyst adopts Ziegler-Natta catalyst, the curing agent adopts dodecyl succinic anhydride and stearic acid, the thickening agent adopts activated montmorillonite, and the surfactant adopts octadecylbenzyl dimethyl ammonium bromide; the liquid bridge plug prepared by the invention has good plugging property, pressure bearing property and thermal stability.
Description
Technical Field
The invention relates to the technical field of lubrication and sealing, in particular to a liquid bridge plug and a preparation method thereof.
Background
In the long-term development process of oil and gas fields, layered treatment operations such as layered oil extraction, layered fracturing, layered water injection, layered water shutoff and other technological measures are often required for oil and water wells with multiple oil layers and thick oil layers. In the well bore layering treatment of these oil and water wells, mechanical methods are mostly used for packing oil layers, and mainly include mechanical packers, draggable bridge plugs and the like. However, when the mechanical method is used for packing an oil layer, if the range of the interlayer of the oil layer is smaller than 3m, the packing position is difficult to find, if the packer is set on the perforation section in a deviation manner, the packing effect is not achieved, and the mechanical method for separating the perforation section of the same oil layer in a thick oil layer is difficult to realize.
In order to solve the above problems, related researchers have been working on developing efficient liquid bridge plugs. However, the existing liquid bridge plug has poor thermal stability and poor mechanical stability, and is very easy to cause poor plugging effect.
The present invention thus solves these problems by preparing a liquid bridge plug.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a liquid bridge plug, which comprises, by mass, 176-543 parts of polymer, 1.75-9.3 parts of cross-linking agent, 0.175-1.4 parts of catalyst, 7-27 parts of curing agent, 1-2 parts of thickening agent, 9.6-20.4 parts of surfactant and 3000-7000 parts of deionized water; the cross-linking agent adopts polyethylene glycol and N-isopropyl acrylamide; the curing agent adopts dodecyl succinic anhydride and stearic acid; the thickener adopts activated montmorillonite; the surfactant adopts octadecyl benzyl dimethyl ammonium bromide.
Furthermore, the polymer adopts polyacrylamide with molecular weight of 1500-1600 ten thousand and hydrolysis degree of 20%.
Further, the molecular weight of the polyethylene glycol is 4000-8000.
Still further, the catalyst employs a Ziegler-Natta catalyst.
Further, a method for preparing the liquid bridge plug comprises the following preparation steps:
(1) Mixing activated montmorillonite and deionized water with the mass of 8.5-9.5 times of that of the activated montmorillonite, stirring for 30-50 min at 300-500 r/min, adding hydrochloric acid with the mass fraction of 0.3-3% to adjust the pH to 4-6, heating to 70-80 ℃ and continuously stirring for 25-35 min, then adding ethanol solution of octadecyl benzyl dimethyl ammonium bromide with the mass of 3.2-3.4 times of that of the activated montmorillonite, cooling to 65-75 ℃, stirring for 3-4 h at 80-100 r/min, washing for 2-4 times with deionized water, carrying out suction filtration, drying and grinding to obtain a primary mixed material;
(2) Mixing stearic acid serving as a curing agent with the mass of 0.8-1.2 times of that of the primary mixed material with ethanol with the mass of 9-11 times of that of the stearic acid, stirring for 30-50 min at 300-500 r/min, adding the primary mixed material obtained in the step (1), continuously stirring for 1-3 h, heating to 60-80 ℃, continuously stirring for 1-3 h, taking out, and putting into a baking oven with the temperature of 70-90 ℃ for drying for 9-11 h to obtain a remixed material;
(3) The preparation method comprises the steps of mixing a Ziegler-Natta catalyst, dodecyl succinic anhydride, a cross-linking agent solution, a re-mixing material and a polymer solution according to a mass ratio of 0.001-0.003: 0.002-0.004: 0.2 to 0.4:0.04 to 0.06:1, mixing, stirring for 30-50 min at 300-500 r/min, and adding a sodium hydroxide solution with the mass fraction of 5% to adjust the pH to 10 to obtain the liquid bridge plug.
Further, the mass fraction of the ethanol solution of the octadecyl benzyl dimethyl ammonium bromide in the step (1) is 30%.
Further, the preparation method of the activated montmorillonite in the step (1) comprises the following steps: mixing 12500-mesh montmorillonite and deionized water with the mass of 8.5-9.5 times of that of the montmorillonite, stirring for 30-50 min at 300-500 r/min, then adding sodium carbonate with the mass of 0.08-0.11 times of that of the montmorillonite, heating to 65-75 ℃, continuously stirring for 2-3 h, washing with deionized water for 2-4 times, drying at 70-90 ℃ for 11-14 h, crushing and sieving to obtain activated montmorillonite.
Further, the polymer solution of step (3) is prepared as follows: deionized water and polyacrylamide are mixed according to the mass ratio of 1: mixing 0.006-0.008, stirring for 30-50 min at 300-500 r/min, standing and aging for 23-25 h to obtain a polymer solution.
Further, the preparation method of the cross-linking agent solution in the step (3) comprises the following steps: the crosslinking agent polyethylene glycol, N-isopropyl acrylamide and deionized water are mixed according to the mass ratio of 1:0.6 to 0.8: 50-100, and stirring for 30-50 min at 300-500 r/min to obtain a cross-linking agent solution.
Compared with the prior art, the invention has the following beneficial effects:
the liquid bridge plug comprises a polymer, a cross-linking agent, a catalyst, a curing agent, a thickening agent, a surfactant and deionized water, wherein the polymer adopts polyacrylic resin, the cross-linking agent adopts polyethylene glycol and N-isopropyl acrylamide, the catalyst adopts a Ziegler-Natta catalyst, the curing agent adopts dodecyl succinic anhydride and stearic acid, the thickening agent is activated montmorillonite, and the surfactant adopts octadecyl benzyl dimethyl ammonium bromide.
Firstly, octadecyl benzyl dimethyl ammonium bromide enters between montmorillonite layers under the adsorption of montmorillonite, and octadecyl benzyl dimethyl ammonium bromide with small flexibility is arranged on the interlayer of montmorillonite in a standing way, so that similar montmorillonite layers are spread, the interlayer spacing of montmorillonite is increased, the oleophilic performance of montmorillonite is enhanced, when a liquid bridge plug is contacted with petroleum, the montmorillonite on the contact surface adsorbs oil solvent on the contact surface and expands, gel is formed on the contact surface of the liquid bridge plug and petroleum, and the plugging performance of the liquid bridge plug is enhanced.
Secondly, the polyacrylic resin and the cross-linking agent penetrate between montmorillonite layers with large interlayer spacing by adopting polyethylene glycol, N-isopropyl acrylamide and a curing agent stearic acid to form a stearic acid/montmorillonite and polyethylene glycol/montmorillonite composite phase change material, so that the heat stability of the liquid bridge plug is enhanced; meanwhile, polyacrylic resin, N-isopropyl acrylamide are polymerized with polyethylene glycol and deionized water to form multi-crosslinked poly-N-isopropyl acrylamide and polyacrylic acid composite gel, so that the pressure bearing capacity of the liquid bridge plug is enhanced.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to more clearly illustrate the method provided by the invention, the following examples are used for describing the method in detail, and the method for testing each index of the liquid bridge plug prepared in the following examples is as follows:
and (3) pressure bearing performance test: the liquid bridge plugs prepared in the examples and the comparative examples have a sealing leakage area of 1mm 2 At a maximum of 30min at some pressure, no pressure drop was measured.
Thermal stability performance test: the liquid bridge plugs prepared in the examples and the comparative examples have a leakage area of 1mm at a temperature of 150 ℃ and a humidity of 60% 2 At a maximum of 30min at some pressure, no pressure drop was measured.
Example 1
(1) Mixing 12500 mesh montmorillonite and deionized water with the mass of 8.5 times of that of the montmorillonite, stirring for 30min at 300r/min, then adding sodium carbonate with the mass of 0.08 times of that of the montmorillonite, heating to 65 ℃, continuously stirring for 2h, then washing with deionized water for 2 times, drying for 11h at 70 ℃, crushing and sieving to obtain activated montmorillonite; mixing activated montmorillonite and deionized water with the mass of 8.5 times of the activated montmorillonite, stirring for 300min at 300r/min, adding hydrochloric acid with the mass fraction of 0.3% to adjust the pH value to 4, heating to 70 ℃ and continuously stirring for 25min, then adding ethanol solution of octadecyl benzyl dimethyl ammonium bromide with the mass fraction of 30% which is 3.2 times of the mass fraction of the activated montmorillonite, cooling to 65 ℃, stirring for 3h at 80r/min, washing for 2 times with deionized water, carrying out suction filtration, drying and grinding to obtain a primary mixed material;
(2) Mixing stearic acid serving as a curing agent with the mass 0.8 times of that of the primary mixed material with ethanol with the mass 9 times of that of the stearic acid, stirring for 30min at 300r/min, adding the primary mixed material obtained in the step (1), continuously stirring for 1h, then heating to 60 ℃, continuously stirring for 1h, taking out, and drying in a baking oven at 70 ℃ for 9h to obtain a secondary mixed material;
(3) Deionized water and polyacrylamide are mixed according to the mass ratio of 1: mixing the materials at 0.006, stirring the materials at 300r/min for 30min, standing and aging the materials for 23h to obtain a polymer solution; the crosslinking agent polyethylene glycol, N-isopropyl acrylamide and deionized water are mixed according to the mass ratio of 1:0.6:50, mixing, stirring for 30min at 300r/min to obtain a cross-linking agent solution; mixing a Ziegler-Natta catalyst, dodecyl succinic anhydride, a cross-linking agent solution, a reblending agent and a polymer solution according to the mass ratio of 0.001:0.002:0.2:0.04:1, stirring for 30min at 300r/min, and adding sodium hydroxide solution with mass fraction of 5% to adjust the pH to 10 to obtain the liquid bridge plug.
Example 2
(1) Mixing 12500 mesh montmorillonite and deionized water 9 times of the montmorillonite, stirring for 40min at 400r/min, adding sodium carbonate 10 times of the montmorillonite, heating to 70deg.C, stirring for 2.5 and h, washing with deionized water for 3 times, drying at 80deg.C for 12 hr, crushing, and sieving to obtain activated montmorillonite; mixing activated montmorillonite and deionized water with the mass of 9 times of the activated montmorillonite, stirring for 40min at 400r/min, adding hydrochloric acid with the mass fraction of 1.6% to adjust the pH value to 5, heating to 75 ℃, continuously stirring for 30min, then adding ethanol solution of octadecyl benzyl dimethyl ammonium bromide with the mass fraction of 30% which is 3.3 times of the mass of the activated montmorillonite, cooling to 70 ℃, stirring for 3.5 h at 90r/min, washing for 3 times with deionized water, carrying out suction filtration, drying and grinding to obtain a primary mixed material;
(2) Mixing stearic acid serving as a curing agent with the mass 1 times of that of the primary mixed material with ethanol with the mass 10 times of that of the primary mixed material, stirring for 40min at 400r/min, adding the primary mixed material obtained in the step (1), continuously stirring for 2h, then heating to 70 ℃, continuously stirring for 2h, taking out, and drying in an oven at 80 ℃ for 10h to obtain a secondary mixed material;
(3) Deionized water and polyacrylamide are mixed according to the mass ratio of 1: mixing 0.007, stirring at 400r/min for 40min, standing and aging for 24h to obtain polymer solution; the crosslinking agent polyethylene glycol, N-isopropyl acrylamide and deionized water are mixed according to the mass ratio of 1:0.7:75, stirring for 40min at 400r/min to obtain a cross-linking agent solution; mixing a Ziegler-Natta catalyst, dodecyl succinic anhydride, a cross-linking agent solution, a reblending agent and a polymer solution according to the mass ratio of 0.002:0.003:0.3:0.05:1, stirring for 40min at 400r/min, and adding sodium hydroxide solution with mass fraction of 5% to adjust the pH to 10 to obtain the liquid bridge plug.
Example 3
(1) Mixing 12500 mesh montmorillonite and deionized water with a weight of 9.5 times of that of the montmorillonite, stirring for 50min at 500r/min, adding sodium carbonate with a weight of 0.11 times of that of the montmorillonite, heating to 75 ℃, continuously stirring for 3h, washing with deionized water for 4 times, drying at 90 ℃ for 14h, crushing, and sieving to obtain activated montmorillonite; mixing activated montmorillonite and deionized water with the mass of 9.5 times of the activated montmorillonite, stirring for 50min at 500r/min, adding hydrochloric acid with the mass fraction of 3% to adjust the pH value to 6, heating to 80 ℃ and continuously stirring for 35min, then adding ethanol solution of octadecyl benzyl dimethyl ammonium bromide with the mass fraction of 30% of the mass fraction of 3.4 times of the activated montmorillonite, cooling to 75 ℃, stirring for 4h at 100r/min, washing for 4 times with deionized water, carrying out suction filtration, drying and grinding to obtain a primary mixed material;
(2) Mixing stearic acid serving as a curing agent with the mass 1.2 times of that of the primary mixed material with ethanol with the mass 11 times of that of the stearic acid, stirring for 50min at 500r/min, adding the primary mixed material obtained in the step (1), continuously stirring for 3h, then heating to 80 ℃, continuously stirring for 3h, taking out, and drying in a baking oven at 90 ℃ for 11h to obtain a secondary mixed material;
(3) Deionized water and polyacrylamide are mixed according to the mass ratio of 1: mixing at 0.008, stirring at 500r/min for 50min, standing and aging for 25h to obtain polymer solution; the crosslinking agent polyethylene glycol, N-isopropyl acrylamide and deionized water are mixed according to the mass ratio of 1:0.8:100, stirring for 50min at 500r/min to obtain a cross-linking agent solution; mixing a Ziegler-Natta catalyst, dodecyl succinic anhydride, a cross-linking agent solution, a reblending agent and a polymer solution according to the mass ratio of 0.003:0.004:0.4:0.06:1, stirring for 50min at 500r/min, and adding sodium hydroxide solution with mass fraction of 5% to adjust pH to 10 to obtain the liquid bridge plug.
Comparative example 1
(1) Mixing 12500 mesh montmorillonite and deionized water 9 times of the montmorillonite, stirring for 40min at 400r/min, adding sodium carbonate 10 times of the montmorillonite, heating to 70deg.C, stirring for 2.5 and h, washing with deionized water for 3 times, drying at 80deg.C for 12 hr, crushing, and sieving to obtain activated montmorillonite; mixing activated montmorillonite and deionized water with the mass of 9 times of the activated montmorillonite, stirring for 40min at 400r/min, adding hydrochloric acid with the mass fraction of 1.6% to adjust the pH value to 5, heating to 75 ℃, continuously stirring for 30min, then adding an ethanol solution of alkyl glucoside with the mass fraction of 30% and the mass fraction of 3.3 times of the activated montmorillonite, cooling to 70 ℃, stirring for 3.5 h at 90r/min, washing for 3 times with deionized water, carrying out suction filtration, drying and grinding to obtain a primary mixed material;
(2) Mixing stearic acid serving as a curing agent with the mass 1 times of that of the primary mixed material with ethanol with the mass 10 times of that of the primary mixed material, stirring for 40min at 400r/min, adding the primary mixed material obtained in the step (1), continuously stirring for 2h, then heating to 70 ℃, continuously stirring for 2h, taking out, and drying in an oven at 80 ℃ for 10h to obtain a secondary mixed material;
(3) Deionized water and polyacrylamide are mixed according to the mass ratio of 1: mixing 0.007, stirring at 400r/min for 40min, standing and aging for 24h to obtain polymer solution; the crosslinking agent polyethylene glycol, N-isopropyl acrylamide and deionized water are mixed according to the mass ratio of 1:0.7:75, stirring for 40min at 400r/min to obtain a cross-linking agent solution; mixing a Ziegler-Natta catalyst, dodecyl succinic anhydride, a cross-linking agent solution, a reblending agent and a polymer solution according to the mass ratio of 0.002:0.003:0.3:0.05:1, stirring for 40min at 400r/min, and adding sodium hydroxide solution with mass fraction of 5% to adjust the pH to 10 to obtain the liquid bridge plug.
Comparative example 2
(1) Mixing 12500-mesh fumed silica and deionized water with the mass of 9 times of the fumed silica, stirring for 40min at 400r/min, then adding sodium carbonate with the mass of 10 times of the fumed silica, heating to 70 ℃, continuously stirring for 2.5 and h, then washing with deionized water for 3 times, drying at 80 ℃ for 12h, crushing and sieving to obtain activated fumed silica; mixing activated fumed silica and deionized water with the mass of 9 times of the activated fumed silica, stirring for 40min at 400r/min, adding hydrochloric acid with the mass fraction of 1.6% to adjust the pH value to 5, heating to 75 ℃, continuously stirring for 30min, then adding ethanol solution of octadecyl benzyl dimethyl ammonium bromide with the mass fraction of 30% which is 3.3 times of the mass of the activated fumed silica, cooling to 70 ℃, stirring for 3.5 h at 90r/min, washing for 3 times with deionized water, carrying out suction filtration, drying, and grinding to obtain a primary mixed material;
(2) Mixing stearic acid serving as a curing agent with the mass 1 times of that of the primary mixed material with ethanol with the mass 10 times of that of the primary mixed material, stirring for 40min at 400r/min, adding the primary mixed material obtained in the step (1), continuously stirring for 2h, then heating to 70 ℃, continuously stirring for 2h, taking out, and drying in an oven at 80 ℃ for 10h to obtain a secondary mixed material;
(3) Deionized water and polyacrylamide are mixed according to the mass ratio of 1: mixing 0.007, stirring at 400r/min for 40min, standing and aging for 24h to obtain polymer solution; the crosslinking agent polyethylene glycol, N-isopropyl acrylamide and deionized water are mixed according to the mass ratio of 1:0.7:75, stirring for 40min at 400r/min to obtain a cross-linking agent solution; mixing a Ziegler-Natta catalyst, dodecyl succinic anhydride, a cross-linking agent solution, a reblending agent and a polymer solution according to the mass ratio of 0.002:0.003:0.3:0.05:1, stirring for 40min at 400r/min, and adding sodium hydroxide solution with mass fraction of 5% to adjust the pH to 10 to obtain the liquid bridge plug.
Comparative example 3
(1) Mixing 12500 mesh montmorillonite and deionized water 9 times of the montmorillonite, stirring for 40min at 400r/min, adding sodium carbonate 10 times of the montmorillonite, heating to 70deg.C, stirring for 2.5 and h, washing with deionized water for 3 times, drying at 80deg.C for 12 hr, crushing, and sieving to obtain activated montmorillonite; mixing activated montmorillonite and deionized water with the mass of 9 times of the activated montmorillonite, stirring for 40min at 400r/min, adding hydrochloric acid with the mass fraction of 1.6% to adjust the pH value to 5, heating to 75 ℃, continuously stirring for 30min, then adding ethanol solution of octadecyl benzyl dimethyl ammonium bromide with the mass fraction of 30% which is 3.3 times of the mass of the activated montmorillonite, cooling to 70 ℃, stirring for 3.5 h at 90r/min, washing for 3 times with deionized water, carrying out suction filtration, drying and grinding to obtain a primary mixed material;
(2) Mixing stearic acid serving as a curing agent with the mass 1 times of that of the primary mixed material with ethanol with the mass 10 times of that of the primary mixed material, stirring for 40min at 400r/min, adding the primary mixed material obtained in the step (1), continuously stirring for 2h, then heating to 70 ℃, continuously stirring for 2h, taking out, and drying in an oven at 80 ℃ for 10h to obtain a secondary mixed material;
(3) Deionized water and polyacrylamide are mixed according to the mass ratio of 1: mixing 0.007, stirring at 400r/min for 40min, standing and aging for 24h to obtain polymer solution; crosslinking agent N-isopropyl acrylamide and deionized water according to the mass ratio of 0.7:75, stirring for 40min at 400r/min to obtain a cross-linking agent solution; mixing a Ziegler-Natta catalyst, dodecyl succinic anhydride, a cross-linking agent solution, a reblending agent and a polymer solution according to the mass ratio of 0.002:0.003:0.3:0.05:1, stirring for 40min at 400r/min, and adding sodium hydroxide solution with mass fraction of 5% to adjust the pH to 10 to obtain the liquid bridge plug.
Comparative example 4
(1) Mixing 12500 mesh montmorillonite and deionized water 9 times of the montmorillonite, stirring for 40min at 400r/min, adding sodium carbonate 10 times of the montmorillonite, heating to 70deg.C, stirring for 2.5 and h, washing with deionized water for 3 times, drying at 80deg.C for 12 hr, crushing, and sieving to obtain activated montmorillonite; mixing activated montmorillonite and deionized water with the mass of 9 times of the activated montmorillonite, stirring for 40min at 400r/min, adding hydrochloric acid with the mass fraction of 1.6% to adjust the pH value to 5, heating to 75 ℃, continuously stirring for 30min, then adding ethanol solution of octadecyl benzyl dimethyl ammonium bromide with the mass fraction of 30% which is 3.3 times of the mass of the activated montmorillonite, cooling to 70 ℃, stirring for 3.5 h at 90r/min, washing for 3 times with deionized water, carrying out suction filtration, drying and grinding to obtain a primary mixed material;
(3) Deionized water and polyacrylamide are mixed according to the mass ratio of 1: mixing 0.007, stirring at 400r/min for 40min, standing and aging for 24h to obtain polymer solution; the crosslinking agent polyethylene glycol, N-isopropyl acrylamide and deionized water are mixed according to the mass ratio of 1:0.7:75, stirring for 40min at 400r/min to obtain a cross-linking agent solution; mixing a Ziegler-Natta catalyst, dodecyl succinic anhydride, a cross-linking agent solution, a primary mixture and a polymer solution according to the mass ratio of 0.002:0.003:0.3:0.05:1, stirring for 40min at 400r/min, and adding sodium hydroxide solution with mass fraction of 5% to adjust the pH to 10 to obtain the liquid bridge plug.
Effect example
The following table 1 shows the results of analysis of the pressure resistance and thermal stability of the liquid bridge plugs prepared in examples 1 to 3 and comparative examples 1 to 4 according to the present invention.
Table 1 shows the results of analysis of the pressure-bearing and thermal stability of the liquid bridge plug
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | |
| Normal temperature pressure-bearing intensity (MPa) | 12.2 | 12.6 | 12.4 | 2.8 | 3.7 | 7.2 | 12.3 |
| Pressure of 150 ℃ under pressure (MPa) | 11.1 | 11.8 | 11.5 | 0.6 | 0.9 | 5.3 | 10.2 |
From Table 1, it can be found that the liquid bridge plugs prepared in examples 1, 2 and 3 have better pressure-bearing property and thermal stability; from comparison of experimental data of examples 1, 2 and 3 and comparative example 1, it can be found that the surfactant adopts octadecyl benzyl dimethyl ammonium bromide to prepare the liquid bridge plug, and the prepared liquid bridge plug has better pressure bearing property and thermal stability; from the experimental data of examples 1, 2 and 3 and comparative example 2, it can be found that the thickener adopts activated montmorillonite to prepare the liquid bridge plug, and the prepared liquid bridge plug has better pressure bearing property and thermal stability; from the experimental data of examples 1, 2 and 3 and comparative example 3, it can be found that the cross-linking agent adopts polyethylene glycol to prepare the liquid bridge plug, and the prepared liquid bridge plug has better pressure-bearing property and thermal stability; from the experimental data of examples 1, 2, 3 and comparative example 4, it was found that the curing agent used stearic acid to prepare the liquid bridge plug, and the prepared liquid bridge plug had better thermal stability.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The liquid bridge plug is characterized by comprising, by mass, 176-543 parts of a polymer, 1.75-9.3 parts of a cross-linking agent, 0.175-1.4 parts of a catalyst, 7-27 parts of a curing agent, 1-2 parts of a thickening agent, 9.6-20.4 parts of a surfactant and 3000-7000 parts of deionized water; the cross-linking agent adopts polyethylene glycol and N-isopropyl acrylamide; the curing agent adopts dodecyl succinic anhydride and stearic acid; the thickener adopts activated montmorillonite; the surfactant adopts octadecyl benzyl dimethyl ammonium bromide;
wherein the polymer adopts polyacrylamide with molecular weight of 1500-1600 ten thousand and hydrolysis degree of 20%.
2. The liquid bridge plug of claim 1, wherein the polyethylene glycol has a molecular weight of 4000 to 8000.
3. The liquid bridge plug of claim 1, wherein the catalyst is a ziegler-natta catalyst.
4. A method of preparing a liquid bridge plug according to any one of claims 1 to 3, comprising the steps of:
(1) Mixing activated montmorillonite and deionized water with the mass of 8.5-9.5 times of that of the activated montmorillonite, stirring for 30-50 min at 300-500 r/min, adding hydrochloric acid with the mass fraction of 0.3-3% to adjust the pH to 4-6, heating to 70-80 ℃ and continuously stirring for 25-35 min, then adding ethanol solution of octadecyl benzyl dimethyl ammonium bromide with the mass of 3.2-3.4 times of that of the activated montmorillonite, cooling to 65-75 ℃, stirring for 3-4 h at 80-100 r/min, washing for 2-4 times with deionized water, carrying out suction filtration, drying and grinding to obtain a primary mixed material;
(2) Mixing stearic acid serving as a curing agent with the mass of 0.8-1.2 times of that of the primary mixed material with ethanol with the mass of 9-11 times of that of the stearic acid, stirring for 30-50 min at 300-500 r/min, adding the primary mixed material obtained in the step (1), continuously stirring for 1-3 h, heating to 60-80 ℃, continuously stirring for 1-3 h, taking out, and putting into a baking oven with the temperature of 70-90 ℃ for drying for 9-11 h to obtain a remixed material;
(3) The preparation method comprises the steps of mixing a Ziegler-Natta catalyst, dodecyl succinic anhydride, a cross-linking agent solution, a re-mixing material and a polymer solution according to a mass ratio of 0.001-0.003: 0.002-0.004: 0.2 to 0.4:0.04 to 0.06:1, mixing, stirring for 30-50 min at 300-500 r/min, and adding a sodium hydroxide solution with the mass fraction of 5% to adjust the pH to 10 to obtain the liquid bridge plug.
5. The method for preparing a liquid bridge plug according to claim 4, wherein the mass fraction of the ethanol solution of octadecyl benzyl dimethyl ammonium bromide in the step (1) is 30%.
6. The method of preparing a liquid bridge plug according to claim 4, wherein the activated montmorillonite of step (1) is prepared by the following steps: mixing 12500-mesh montmorillonite and deionized water with the mass of 8.5-9.5 times of that of the montmorillonite, stirring for 30-50 min at 300-500 r/min, then adding sodium carbonate with the mass of 0.08-0.11 times of that of the montmorillonite, heating to 65-75 ℃, continuously stirring for 2-3 h, washing with deionized water for 2-4 times, drying at 70-90 ℃ for 11-14 h, crushing and sieving to obtain activated montmorillonite.
7. The method of preparing a liquid bridge plug according to claim 4, wherein the method of preparing the polymer solution of step (3) is as follows: deionized water and polyacrylamide are mixed according to the mass ratio of 1: mixing 0.006-0.008, stirring for 30-50 min at 300-500 r/min, standing and aging for 23-25 h to obtain a polymer solution.
8. The method of preparing a liquid bridge plug according to claim 4, wherein the method of preparing the crosslinker solution of step (3) is as follows: the crosslinking agent polyethylene glycol, N-isopropyl acrylamide and deionized water are mixed according to the mass ratio of 1:0.6 to 0.8: 50-100, and stirring for 30-50 min at 300-500 r/min to obtain a cross-linking agent solution.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1172890A (en) * | 1997-08-27 | 1998-02-11 | 辽河石油勘探局钻采工艺研究院 | Preparing and use of liquid bridging plug |
| CN102295729A (en) * | 2010-06-25 | 2011-12-28 | 中国石油化工集团公司 | Preparation method of absorbent resin plugging agent |
| CN108440888A (en) * | 2018-04-27 | 2018-08-24 | 佛山九陌科技信息咨询有限公司 | A kind of preparation method of imvite modified polyacrylamide |
| CN112094389A (en) * | 2020-09-25 | 2020-12-18 | 中国石油集团渤海钻探工程有限公司 | High-temperature-resistant liquid bridge plug, preparation method and construction method |
| CN112983374A (en) * | 2021-02-05 | 2021-06-18 | 中国石油天然气股份有限公司 | Liquid bridge plug under-pressure operation method |
| CN114437686A (en) * | 2020-10-20 | 2022-05-06 | 中国石油化工股份有限公司 | High-temperature-resistant high-salt-resistant chemical bridge plug composition for well bore, gel thereof, preparation method and application |
| CN116103027A (en) * | 2023-03-06 | 2023-05-12 | 深圳海程油田技术服务有限公司 | Liquid bridge plug and preparation method and application thereof |
| CN116218493A (en) * | 2021-12-06 | 2023-06-06 | 中国石油天然气股份有限公司 | Soluble liquid bridge plug, preparation method and horizontal well sectional water shutoff method |
| CN116285916A (en) * | 2023-03-21 | 2023-06-23 | 西南石油大学 | Metal drag reducer for drilling and grinding bridge plug operation and preparation method thereof |
-
2023
- 2023-07-21 CN CN202310899456.5A patent/CN116606637B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1172890A (en) * | 1997-08-27 | 1998-02-11 | 辽河石油勘探局钻采工艺研究院 | Preparing and use of liquid bridging plug |
| CN102295729A (en) * | 2010-06-25 | 2011-12-28 | 中国石油化工集团公司 | Preparation method of absorbent resin plugging agent |
| CN108440888A (en) * | 2018-04-27 | 2018-08-24 | 佛山九陌科技信息咨询有限公司 | A kind of preparation method of imvite modified polyacrylamide |
| CN112094389A (en) * | 2020-09-25 | 2020-12-18 | 中国石油集团渤海钻探工程有限公司 | High-temperature-resistant liquid bridge plug, preparation method and construction method |
| CN114437686A (en) * | 2020-10-20 | 2022-05-06 | 中国石油化工股份有限公司 | High-temperature-resistant high-salt-resistant chemical bridge plug composition for well bore, gel thereof, preparation method and application |
| CN112983374A (en) * | 2021-02-05 | 2021-06-18 | 中国石油天然气股份有限公司 | Liquid bridge plug under-pressure operation method |
| CN116218493A (en) * | 2021-12-06 | 2023-06-06 | 中国石油天然气股份有限公司 | Soluble liquid bridge plug, preparation method and horizontal well sectional water shutoff method |
| CN116103027A (en) * | 2023-03-06 | 2023-05-12 | 深圳海程油田技术服务有限公司 | Liquid bridge plug and preparation method and application thereof |
| CN116285916A (en) * | 2023-03-21 | 2023-06-23 | 西南石油大学 | Metal drag reducer for drilling and grinding bridge plug operation and preparation method thereof |
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