CN115073509A - CO 2 Regulation and control type crack gas channeling prevention plugging agent and preparation method and application thereof - Google Patents
CO 2 Regulation and control type crack gas channeling prevention plugging agent and preparation method and application thereof Download PDFInfo
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- CN115073509A CN115073509A CN202110283028.0A CN202110283028A CN115073509A CN 115073509 A CN115073509 A CN 115073509A CN 202110283028 A CN202110283028 A CN 202110283028A CN 115073509 A CN115073509 A CN 115073509A
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- 230000005465 channeling Effects 0.000 title claims abstract description 79
- 230000002265 prevention Effects 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 35
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 55
- 230000001105 regulatory effect Effects 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 150000001875 compounds Chemical class 0.000 claims abstract description 32
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 32
- LDVVTQMJQSCDMK-UHFFFAOYSA-N 1,3-dihydroxypropan-2-yl formate Chemical compound OCC(CO)OC=O LDVVTQMJQSCDMK-UHFFFAOYSA-N 0.000 claims abstract description 29
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000011259 mixed solution Substances 0.000 claims abstract description 25
- 239000003054 catalyst Substances 0.000 claims abstract description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 239000013067 intermediate product Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 230000009471 action Effects 0.000 claims abstract description 6
- 239000002981 blocking agent Substances 0.000 claims description 31
- DNIAPMSPPWPWGF-UHFFFAOYSA-N monopropylene glycol Natural products CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 10
- -1 propylene glycol fatty acid ester Chemical class 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 238000013329 compounding Methods 0.000 claims description 7
- 150000002148 esters Chemical group 0.000 claims description 7
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 claims description 5
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 5
- 239000000194 fatty acid Substances 0.000 claims description 5
- 229930195729 fatty acid Natural products 0.000 claims description 5
- 239000005049 silicon tetrachloride Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims 1
- 230000006872 improvement Effects 0.000 description 17
- 238000002347 injection Methods 0.000 description 12
- 239000007924 injection Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 239000000839 emulsion Substances 0.000 description 8
- 230000018109 developmental process Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 6
- 239000007795 chemical reaction product Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000007863 gel particle Substances 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 3
- 239000000499 gel Substances 0.000 description 3
- 230000036632 reaction speed Effects 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000033558 biomineral tissue development Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/04—Esters of silicic acids
- C07F7/07—Cyclic esters
-
- 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/261—Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
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- Geochemistry & Mineralogy (AREA)
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Abstract
The invention discloses CO 2 The regulating type crack gas channeling prevention plugging agent has the structural formula:
CO (carbon monoxide) 2 The preparation method of the regulating type crack gas channeling prevention plugging agent comprises the following steps: (1) mixing tetraethoxysilane and monoglyceride to obtain a mixture, heating the mixture to 140-150 ℃, and reacting for 6-7 hours under the action of a catalyst to obtain an intermediate product; (2) uniformly mixing a compound emulsifier and water to obtain a mixed solution, adding the intermediate product obtained in the step (1), and dispersing at 80-90 ℃ for 50-60min to obtain the productCO 2 A regulating type gas channeling prevention plugging agent for cracks. By using
As CO 2 A regulating type gas channeling prevention plugging agent for cracks.
Description
Technical Field
The invention belongs to the field of oil field exploration, and particularly relates to CO 2 A regulating type crack gas channeling prevention plugging agent, a preparation method and application thereof.
Background
Fracturing development (especially early oil-water wells) is commonly adopted for low-permeability oil reservoirs, and along with the continuous water injection development of low-permeability oil fields, injected water flows along fracturing fractures, so that the water injection development effect is seriously influenced, and the water drive recovery rate is low.
The alternation of water and gas is one of the effective methods for improving the water flooding development effect of low-permeability oil fields. However, the regulation and control effect of the water-gas alternation on the early large-scale fracturing is limited, so that the oil well quickly sees gas, and the water-gas alternation flooding effect is poor. Therefore, the development of the anti-channeling agent which is easy to inject and can effectively block the channeling of the crack has important significance for improving the economic benefit of oil field exploitation.
Disclosure of Invention
The object of the present invention is to provide CO 2 A regulating type crack gas channeling prevention plugging agent, a preparation method and application thereof.
CO 2 Regulation type crack gas channeling prevention sealThe plugging agent can be hydrolyzed to form gel particles and CO in the high-temperature environment of the stratum 2 The reaction speed can be regulated and controlled by the injection amount, the high-salt environment does not influence aggregation among gel particles to form a high-strength plugging system, and effective plugging of cracks is realized. The gas channeling blocking preventing agent has low initial viscosity, strong flowability and excellent injectability. The system is not influenced by temperature and mineralization degree, so that long-term effective plugging can be realized. Solves the problem of high-temperature and high-salinity reservoir CO 2 The channeling along the crack is serious, and the development effect is influenced.
The technical scheme adopted by the invention is as follows:
CO 2 the regulating type crack gas channeling prevention plugging agent has the structural formula:
CO as described above 2 The regulating crack gas channeling preventing and blocking agent is synthesized by using tetraethoxysilane and monoglyceride through an ester exchange reaction, and the synthesis mechanism is as follows:
CO (carbon monoxide) 2 The preparation method of the regulating type crack gas channeling prevention plugging agent comprises the following steps:
(1) mixing tetraethoxysilane and monoglyceride to obtain a mixture, heating the mixture to 140-150 ℃, and reacting for 6-7 hours under the action of a catalyst to obtain an intermediate product;
(2) uniformly mixing a compound emulsifier and water to obtain a mixed solution, adding the intermediate product obtained in the step (1), and dispersing at 80-90 ℃ for 50-60min to obtain CO 2 A regulating type gas channeling prevention plugging agent for cracks.
As a further improvement of the invention, in the step (1), the molar ratio of the tetraethoxysilane to the monoglyceride is 1 (2-2.1).
As a further improvement of the invention, in the step (1), the catalyst is concentrated sulfuric acid or silicon tetrachloride.
Furthermore, the addition amount of the catalyst is 0.5-1 wt% of the sum of the mass of the tetraethoxysilane and the monoglyceride.
As a further improvement of the invention, in the step (2), the mass percentage of the water is 70-80 wt%.
As a further improvement of the invention, in the step (2), the compound emulsifier is prepared by compounding propylene glycol fatty acid ester and polyoxyethylene monooleate.
Further, the preparation process of the mixed solution in the step (2) is as follows: adding a proper amount of water, and then submitting the compound emulsifier, wherein the HLB value of the mixed solution is 10-13.
As a further improvement of the invention, in the step (2), the compound emulsifier is prepared by compounding SP80 and TW 80.
Further, the preparation process of the mixed solution in the step (2) is as follows: adding a proper amount of water, and then submitting the compound emulsifier, wherein the HLB value of the mixed solution is 9-12.
By using
As CO 2 A regulating type gas channeling prevention plugging agent for cracks.
CO 2 The anti-channeling mechanism of the regulating type crack anti-channeling plugging agent is as follows:
CO 2 the regulated crack gas channeling preventing plugging agent can be hydrolyzed to generate solid gel and CO in the high-temperature environment of the oil well stratum 2 The resulting low pH environment can accelerate this reaction process, and the resulting solid gel can create an impermeable barrier in the microscopic pores, resulting in good channeling sealing.
Compared with the prior art, the invention has the following advantages:
the invention makes full use of CO 2 Regulation of CO 2 Regulated crack gas channeling prevention plugging agent, CO 2 The adjustable crack gas channeling preventing and blocking agent takes tetraethoxysilane and monoglyceride as raw materials, and gel particles are prepared by ester exchange reaction, CO 2 The reaction speed can be regulated and controlled by the injection amount, the high-salt environment does not influence aggregation among gel particles to form a high-strength plugging system, and effective plugging of cracks is realized. CO 2 2 The regulating and controlling type crack gas channeling preventing plugging agent has low initial viscosity, strong liquidity and good injectability. The system is not influenced by temperature and mineralization degree, so that long-term effective plugging can be realized. Solves the problem of high-temperature and high-salinity reservoir CO 2 The channeling along the crack is serious, and the development effect is influenced.
The specific implementation mode is as follows:
the technical solution in the embodiments of the present invention will be clearly and completely described below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
CO of the invention 2 The regulating type crack gas channeling blocking agent has the following structural formula:
the principle is as follows: prepared CO for preventing crack and gas channeling 2 When the controlled anti-channeling and blocking agent is used, tetraethoxysilane and monoglyceride are used as raw materials, and the anti-channeling and blocking agent is prepared by ester exchange reaction and is insoluble in water and ethanol, so that the anti-channeling and blocking agent can be dispersed in water to form stable emulsion. CO 2 2 The reaction speed can be regulated and controlled by the injection amount, the high-salt environment does not influence aggregation among gel particles to form a high-strength plugging system, and effective plugging of cracks is realized. The anti-channeling principle is realized by the following reactions:
example 1
CO (carbon monoxide) 2 The preparation method of the regulating type crack gas channeling prevention plugging agent comprises the following steps:
adding 21g of tetraethoxysilane and 28g of monoglyceride into a three-neck flask with a stirrer, mixing, then adding 0.42g of concentrated sulfuric acid, heating to 140 ℃, and reacting for 6 hours to obtain a waxy particle product;
mixing 0.84g of compound emulsifier with 75g of water, adding 25g of reaction product, and dispersing at 80 ℃ for 50min to obtain CO 2 A regulating type gas channeling prevention plugging agent for cracks.
CO is carried out under the condition that the injection pressure is 3.5MPa 2 Gas drive is stopped after gas channeling is stable, then the anti-channeling blocking agent emulsion is injected into the simulated core cracks, and CO is continuously injected after the anti-channeling blocking agent system is stable 2 And measuring that the gas flow rate at the core fracture position before plugging is up to 680mL/min, and the gas flow rate at the core fracture position after plugging is reduced to 70 mL/min. The experimental result shows that the anti-channeling blocking agent has good channeling blocking effect.
Example 2
CO (carbon monoxide) 2 The preparation method of the regulating type crack gas channeling prevention plugging agent comprises the following steps:
adding 24g of tetraethoxysilane and 32g of monoglyceride into a three-neck flask with a stirrer, mixing, then adding 0.45g of concentrated sulfuric acid, heating to 150 ℃, and reacting for 7 hours to obtain a wax-like particle product;
mixing 0.85g of compound emulsifier with 80g of water, adding 20g of reaction product, and dispersing at 80 ℃ for 60min to obtain CO 2 A regulating type crack gas channeling prevention plugging agent.
CO is carried out under the condition that the injection pressure is 3.5MPa 2 Gas drive is stopped after gas channeling is stable, then the anti-channeling blocking agent emulsion is injected into the simulated core cracks, and CO is continuously injected after the anti-channeling blocking agent system is stable 2 And measuring that the gas flow rate at the core fracture position before plugging is up to 680mL/min, and the gas flow rate at the core fracture position after plugging is reduced to 65 mL/min. The experimental result shows that the anti-channeling and blocking agent toolHas good channeling sealing effect.
Example 3
CO (carbon monoxide) 2 The preparation method of the regulating type crack gas channeling prevention plugging agent comprises the following steps:
26g of ethyl orthosilicate and 35g of monoglyceride were added to a three-necked flask equipped with a stirrer, followed by 0.50g of silicon tetrachloride. Heating to 150 ℃, and reacting for 6.5h to obtain a wax particle product;
mixing 0.92g of compound emulsifier with 80g of water, adding 20g of reaction product, and dispersing at 90 ℃ for 55min to obtain CO 2 A regulating type gas channeling prevention plugging agent for cracks.
CO is carried out under the condition that the injection pressure is 3.5MPa 2 Gas drive is stopped after gas channeling is stable, then the anti-channeling blocking agent emulsion is injected into the simulated core cracks, and CO is continuously injected after the anti-channeling blocking agent system is stable 2 And measuring that the gas flow rate at the core fracture before plugging is up to 680mL/min, and the gas flow rate at the core fracture after plugging is reduced to 70 mL/min. The experimental result shows that the anti-channeling blocking agent has good channeling blocking effect.
Example 4
CO (carbon monoxide) 2 The preparation method of the regulating type crack gas channeling prevention plugging agent comprises the following steps:
30g of ethyl orthosilicate and 40g of monoglyceride were added to a three-necked flask equipped with a stirrer, followed by 0.64g of silicon tetrachloride. Heating to 140 ℃, and reacting for 7h to obtain a wax particle product;
mixing 0.94g of compound emulsifier with 80g of water, adding 20g of reaction product, and dispersing at 85 ℃ for 60min to obtain CO 2 A regulating type gas channeling prevention plugging agent for cracks.
CO is carried out under the condition that the injection pressure is 3.5MPa 2 Gas drive is stopped after gas channeling is stable, then the anti-channeling blocking agent emulsion is injected into the simulated core cracks, and CO is continuously injected after the anti-channeling blocking agent system is stable 2 And measuring that the gas flow rate at the core fracture position before plugging is up to 680mL/min, and the gas flow rate at the core fracture position after plugging is reduced to 60 mL/min. The experimental result shows that the anti-channeling blocking agent has good channeling blocking effect.
Example 5
CO (carbon monoxide) 2 The preparation method of the regulating type crack gas channeling prevention plugging agent comprises the following steps:
20g of ethyl orthosilicate and 27g of monoglyceride were added to and mixed in a three-necked flask equipped with a stirrer, followed by the addition of 0.42g of concentrated sulfuric acid. Heating to 145 ℃, and reacting for 6h to obtain a wax particle product;
mixing 0.85g of compound emulsifier and 75g of water, adding 25g of reaction product, and dispersing at 90 ℃ for 50min to obtain CO 2 A regulating type gas channeling prevention plugging agent for cracks.
CO is carried out under the condition that the injection pressure is 3.5MPa 2 Gas drive is stopped after gas channeling is stable, then the anti-channeling blocking agent emulsion is injected into the simulated core cracks, and CO is continuously injected after the anti-channeling blocking agent system is stable 2 And measuring that the gas flow rate at the core fracture position before plugging is up to 680mL/min, and the gas flow rate at the core fracture position after plugging is reduced to 70 mL/min. The experimental result shows that the anti-channeling blocking agent has good channeling blocking effect.
Example 6
CO (carbon monoxide) 2 The preparation method of the regulating type crack gas channeling preventing plugging agent comprises the following steps:
in a three-necked flask equipped with a stirrer, 35g of ethyl orthosilicate and 47g of monoglyceride were added and mixed, followed by addition of 0.72g of concentrated sulfuric acid. Heating to 150 ℃, and reacting for 7h to obtain a wax particle product;
mixing 1.20g of compound emulsifier with 80g of water, adding 20g of reaction product, and dispersing at 90 ℃ for 60min to obtain CO 2 A regulating type gas channeling prevention plugging agent for cracks.
CO is carried out under the condition that the injection pressure is 3.5MPa 2 Gas drive is stopped after gas channeling is stable, then the anti-channeling blocking agent emulsion is injected into the simulated core cracks, and CO is continuously injected after the anti-channeling blocking agent system is stable 2 And measuring that the gas flow rate at the core fracture position before plugging is up to 680mL/min, and the gas flow rate at the core fracture position after plugging is reduced to 50 mL/min. The experimental result shows that the anti-channeling blocking agent has good channeling blocking effect.
CO for preventing gas channeling prepared in examples 1 to 6 2 Placing the control type anti-channeling and plugging agent in a beaker, adjusting pH with acid to obtain silica gel, testing basic performance of the silica gel, simultaneously testing resistance factor of carbon dioxide, placing the silica gel in a test tube (the specification of the test tube is phi 2.5 multiplied by 5cm), and injecting 0.1PV CO 2 And respectively recording the pressure at the two sides of the test tube. Using the formula R f ＝P Transfusion system /P Go out The resistance factor is calculated. The test results are shown in table 1.
Table 1 examples 1-6 system performance testing
As can be seen from the table, the apparent density of the plugging gel prepared is more than or equal to 0.088g/cm 3 The contact angle is more than or equal to 131 degrees, the hydrophobic effect can be generated, and simultaneously, the resistance factor>43, has good channeling-preventing effect and plugging effect.
CO is carried out under the condition that the injection pressure is 3.5MPa 2 Gas flooding, stopping after gas channeling is stable, and injecting the anti-channeling blocking agent emulsion obtained in the embodiment 1-6 into a simulated core crack (K is approximately equal to 2 mu m) 2 ) Continuously injecting CO after the anti-channeling and blocking agent system is stabilized 2 And measuring the gas flow rate at the core crack before and after plugging. The results are shown in Table 2.
Table 2 plugging effect of the systems of examples 1-6 on cracks
The experimental result shows that the plugging rate of the preparation system to the crack is more than or equal to 89.7%, and the plugging effect is good. After being placed at 150 ℃ for 6 months, the plugging rate is basically kept unchanged.
Example 7
CO 2 The regulating type crack gas channeling prevention plugging agent has the structural formula:
CO as described above 2 The regulating crack gas channeling preventing and blocking agent is synthesized by using tetraethoxysilane and monoglyceride through an ester exchange reaction, and the synthesis mechanism is as follows:
CO (carbon monoxide) 2 The preparation method of the regulating type crack gas channeling prevention plugging agent comprises the following steps:
(1) mixing tetraethoxysilane and monoglyceride to obtain a mixture, heating the mixture to 140 ℃, and reacting for 7 hours under the action of a catalyst to obtain an intermediate product;
(2) uniformly mixing a compound emulsifier and water to obtain a mixed solution, adding the intermediate product obtained in the step (1), and dispersing at 80 ℃ for 60min to obtain CO 2 A regulating type gas channeling prevention plugging agent for cracks.
As a further improvement of the invention, in the step (1), the molar ratio of the ethyl orthosilicate to the monoglyceride is 1:2.
As a further improvement of the invention, in the step (1), the catalyst is concentrated sulfuric acid.
Further, the addition amount of the catalyst is 0.5 wt% of the sum of the mass of the tetraethoxysilane and the monoglyceride.
As a further improvement of the invention, in the step (2), the mass ratio of the water is 70 wt%.
As a further improvement of the invention, in the step (2), the compound emulsifier is prepared by compounding propylene glycol fatty acid ester and polyoxyethylene monooleate.
Further, the preparation process of the mixed solution in the step (2) is as follows: adding a proper amount of water, and then submitting the compound emulsifier, wherein the HLB value of the mixed solution is 10.
In another embodiment, in step (2), the compound emulsifier is SP80 compounded with TW 80.
Further, the preparation process of the mixed solution in the step (2) is as follows: adding a proper amount of water, and then submitting the compound emulsifier, wherein the HLB value of the mixed solution is 9.
By using
As CO 2 A regulating type gas channeling prevention plugging agent for cracks.
Example 8
CO 2 The regulating type crack gas channeling prevention plugging agent has the structural formula:
CO as described above 2 The regulating crack gas channeling preventing and blocking agent is synthesized by using tetraethoxysilane and monoglyceride through an ester exchange reaction, and the synthesis mechanism is as follows:
CO (carbon monoxide) 2 The preparation method of the regulating type crack gas channeling prevention plugging agent comprises the following steps:
(1) mixing tetraethoxysilane and monoglyceride to obtain a mixture, heating the mixture to 150 ℃, and reacting for 6 hours under the action of a catalyst to obtain an intermediate product;
(2) uniformly mixing a compound emulsifier and water to obtain a mixed solution, adding the intermediate product obtained in the step (1), and dispersing at 90 ℃ for 50min to obtain CO 2 A regulating type gas channeling prevention plugging agent for cracks.
As a further improvement of the invention, in the step (1), the molar ratio of the ethyl orthosilicate to the monoglyceride is 1: 2.1.
As a further improvement of the invention, in step (1), the catalyst is silicon tetrachloride.
Further, the addition amount of the catalyst is 1 wt% of the sum of the mass of the tetraethoxysilane and the monoglyceride.
As a further improvement of the invention, in the step (2), the mass percentage of the water is 80 wt%.
As a further improvement of the invention, in the step (2), the compound emulsifier is prepared by compounding propylene glycol fatty acid ester and polyoxyethylene monooleate.
Further, the preparation process of the mixed solution in the step (2) is as follows: adding a proper amount of water, and then submitting the compound emulsifier, wherein the HLB value of the mixed solution is 13.
In another embodiment, in step (2), the compound emulsifier is SP80 compounded with TW 80.
Further, the preparation process of the mixed solution in the step (2) is as follows: adding a proper amount of water, and then submitting the compound emulsifier, wherein the HLB value of the mixed solution is 12.
By using
As CO 2 A regulating type gas channeling prevention plugging agent for cracks.
Example 9
CO 2 The regulating type crack gas channeling prevention plugging agent has the structural formula:
CO as described above 2 The regulating crack gas channeling preventing and blocking agent is synthesized by using tetraethoxysilane and monoglyceride through an ester exchange reaction, and the synthesis mechanism is as follows:
CO (carbon monoxide) 2 The preparation method of the regulating type crack gas channeling prevention plugging agent comprises the following steps:
(1) mixing tetraethoxysilane and monoglyceride to obtain a mixture, heating the mixture to 145 ℃, and reacting for 6.5 hours under the action of a catalyst to obtain an intermediate product;
(2) uniformly mixing a compound emulsifier and water to obtain a mixed solution, adding the intermediate product obtained in the step (1), and dispersing at 85 ℃ for 55min to obtain CO 2 A regulating type gas channeling prevention plugging agent for cracks.
As a further improvement of the invention, in the step (1), the molar ratio of the ethyl orthosilicate to the monoglyceride is 1: 2.05.
As a further improvement of the invention, in the step (1), the catalyst is concentrated sulfuric acid.
Further, the addition amount of the catalyst is 0.75 wt% of the sum of the mass of the tetraethoxysilane and the monoglyceride.
As a further improvement of the invention, in the step (2), the mass percentage of the water is 75 wt%.
As a further improvement of the invention, in the step (2), the compound emulsifier is prepared by compounding propylene glycol fatty acid ester and polyoxyethylene monooleate.
Further, the preparation process of the mixed solution in the step (2) is as follows: adding a proper amount of water, and then submitting the compound emulsifier, wherein the HLB value of the mixed solution is 12.
In another embodiment, in step (2), the compound emulsifier is SP80 compounded with TW 80.
Further, the preparation process of the mixed solution in the step (2) is as follows: adding a proper amount of water, and then submitting the compound emulsifier, wherein the HLB value of the mixed solution is 10.
By using
As CO 2 A regulating type gas channeling prevention plugging agent for cracks.
The embodiments of the present invention have been described in detail. However, the present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (12)
1.CO 2 The regulation type crack gas channeling prevention plugging agent is characterized by comprising the following structural formula:
2. the CO of claim 1 2 The regulating crack gas channeling preventing and blocking agent is characterized in that the agent is synthesized by tetraethoxysilane and monoglyceride through ester exchange reaction.
3. CO (carbon monoxide) 2 The preparation method of the adjustable crack gas channeling prevention plugging agent is characterized by comprising the following steps:
(1) mixing tetraethoxysilane and monoglyceride to obtain a mixture, heating the mixture to 140-150 ℃, and reacting for 6-7 hours under the action of a catalyst to obtain an intermediate product;
(2) uniformly mixing a compound emulsifier and water to obtain a mixed solution, adding the intermediate product obtained in the step (1), and dispersing at 80-90 ℃ for 50-60min to obtain CO 2 A regulating type crack gas channeling prevention plugging agent.
4. A CO as claimed in claim 3 2 The preparation method of the adjustable crack gas channeling prevention plugging agent is characterized in that in the step (1), the molar ratio of ethyl orthosilicate to monoglyceride is 1 (2-2.1).
5. A CO as claimed in claim 3 2 The preparation method of the regulating type crack gas channeling prevention plugging agent is characterized in that in the step (1), the catalyst is concentrated sulfuric acid or silicon tetrachloride.
6. A CO as claimed in claim 3 2 Regulation type crack gas channeling preventionThe preparation method of the blocking agent is characterized in that the addition amount of the catalyst is 0.5-1 wt% of the sum of the mass of the ethyl orthosilicate and the mass of the monoglyceride.
7. A CO as claimed in claim 3 2 The preparation method of the regulating type crack gas channeling prevention plugging agent is characterized in that in the step (2), the mass ratio of water is 70-80 wt%.
8. A CO as claimed in claim 3 2 The preparation method of the adjustable crack gas channeling prevention plugging agent is characterized in that in the step (2), the compound emulsifier is prepared by compounding propylene glycol fatty acid ester and polyoxyethylene monooleate.
9. A CO as claimed in claim 3 or 8 2 The preparation method of the regulating type crack gas channeling prevention plugging agent is characterized in that the preparation process of the mixed solution in the step (2) is as follows: adding a proper amount of water, and then submitting the compound emulsifier, wherein the HLB value of the mixed solution is 10-13.
10. A CO as claimed in claim 3 2 The preparation method of the regulated crack gas channeling prevention plugging agent is characterized in that in the step (2), the compound emulsifier is prepared by compounding SP80 and TW 80.
11. A CO as claimed in claim 3 2 The preparation method of the regulating type crack gas channeling preventing plugging agent is characterized in that the preparation process of the mixed liquid in the step (2) is as follows: adding a proper amount of water, and then submitting the compound emulsifier, wherein the HLB value of the mixed solution is 9-12.
12. By using
As CO 2 A regulating type gas channeling prevention plugging agent for cracks.
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| CN202110283028.0A CN115073509B (en) | 2021-03-16 | 2021-03-16 | CO 2 Regulation-control type crack gas channeling prevention plugging agent and preparation method and application thereof |
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Citations (3)
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|---|---|---|---|---|
| US6005132A (en) * | 1996-07-23 | 1999-12-21 | Wacker-Chemie Gmbh | Method of preparing alkoxy silanes |
| CN107353886A (en) * | 2017-08-03 | 2017-11-17 | 西南石油大学 | A kind of anti-CO of compact oil reservoir2Nano composite material of has channeling and preparation method thereof |
| CN107686723A (en) * | 2017-08-11 | 2018-02-13 | 中国石油天然气股份有限公司 | CO (carbon monoxide)2Response in-situ gel channeling sealing sol and preparation method and application thereof |
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2021
- 2021-03-16 CN CN202110283028.0A patent/CN115073509B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6005132A (en) * | 1996-07-23 | 1999-12-21 | Wacker-Chemie Gmbh | Method of preparing alkoxy silanes |
| CN107353886A (en) * | 2017-08-03 | 2017-11-17 | 西南石油大学 | A kind of anti-CO of compact oil reservoir2Nano composite material of has channeling and preparation method thereof |
| CN107686723A (en) * | 2017-08-11 | 2018-02-13 | 中国石油天然气股份有限公司 | CO (carbon monoxide)2Response in-situ gel channeling sealing sol and preparation method and application thereof |
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| Title |
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| 褚奇等: "硅烷偶联剂改性纳米 SiO2 封堵剂的制备与作用机理", 《钻井液与完井液》, vol. 33, no. 4, pages 47 - 50 * |
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