CN113355071B - Degradable high-strength resin water shutoff agent and preparation method and application thereof - Google Patents
Degradable high-strength resin water shutoff agent and preparation method and application thereof Download PDFInfo
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- CN113355071B CN113355071B CN202110661542.3A CN202110661542A CN113355071B CN 113355071 B CN113355071 B CN 113355071B CN 202110661542 A CN202110661542 A CN 202110661542A CN 113355071 B CN113355071 B CN 113355071B
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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
- C09K8/502—Oil-based compositions
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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
- C09K2208/08—Fiber-containing well treatment fluids
Abstract
The invention relates to a degradable high-strength resin water shutoff agent and a preparation method and application thereof. The degradable high-strength resin water shutoff agent is prepared from the following raw materials in parts by weight: 79.2 to 88.6 parts of epoxy plant residual oil, 5.4 to 13.2 parts of curing agent, 0.8 to 1.8 parts of initiator, 4.2 to 4.8 parts of flexibilizer and 0.5 to 1.2 parts of reinforcing agent, wherein the sum of the parts by weight of the components is 100 parts. The degradable high-strength resin water shutoff agent prepared by using the epoxy plant residual oil provided by the invention has the advantages of high strength, degradability, excellent plugging performance, deepening property, strong dilution resistance, low price and the like, can effectively solve the high water content problem of high-temperature high-salinity carbonate fractured reservoir, and has important significance on casing damage well repairing and water shutoff fracturing technologies.
Description
Technical Field
The invention relates to the technical field of oil fields, in particular to a degradable high-strength resin water shutoff agent and a preparation method and application thereof.
Background
The water injection development is a main exploitation means of various high-strength oil fields, because of continuous water injection exploitation, contradictions among different reservoirs are prominent, injected water and bottom water quickly break through along a large-crack channel, the water content of an oil well is greatly increased, the oil yield is quickly reduced, and the blocking of the large-crack channel is a key for improving the water injection displacement efficiency. The granular plugging agent and the gel plugging agent are the most widely used plugging agents for plugging oil fields, and the polymer gel plugging agent has the advantages of low price, simple preparation process, excellent plugging effect and the like, so the granular plugging agent and the gel plugging agent are widely applied to chemical water plugging of oil fields, but for high-temperature high-salinity carbonate fractured reservoirs, the reservoir burial depth exceeds 5000m, the temperature is more than 125 ℃, and the mineralization degree exceeds 22 multiplied by 10 4 mg/L, the reservoir layer mainly takes karst caves and cracks with large sizes from a plurality of meters to tens of meters as main materials, the water volume of a reservoir space is large, the polymer jelly has poor dilution resistance, is easy to hydrolyze at high temperature and has poor plugging effect in high-temperature high-salinity carbonate fractured oil reservoirs. The granular plugging agent mainly refers to coal ash, cement, walnut shells, rubber and other particles, is prepared into suspension to be injected into a stratum, and bridging is carried out at a pore throat to realize plugging, and the plugging agent has the advantages of low price, high plugging strength and the like, but the plugging agent is prepared by mixing the coal ash, the cement, the walnut shells, the rubber and other particlesThe bridging difficulty in a large crack channel of the fracture-cavity oil reservoir is large, and remote plugging adjustment is difficult to realize. The Chinese patent with application publication number CN107699219A discloses a high-temperature-resistant high-strength gel plugging system, which has a good plugging effect on a channeling channel, but resin gel has high cost, poor selectivity and difficult degradation, and is easy to cause permanent damage to a reservoir. The Chinese patent with application publication No. CN107699219A discloses a temporary plugging agent for oil and gas reservoir cracks, which contains 10-40% of plant fibers and has the advantages of easy degradation, no pollution and the like, but the plugging agent has poor long-term plugging performance and low strength.
Therefore, the development of a high-strength water plugging agent with low price, high strength, degradability and dilution resistance is still needed to improve the recovery ratio of the high-temperature high-salinity carbonate fractured reservoir.
Disclosure of Invention
In view of the above, there is a need to provide a degradable high-strength resin water shutoff agent and a preparation method thereof, so as to solve the technical problems of high cost, low strength, difficult degradation and poor dilution resistance of the water shutoff agent in the prior art.
The invention provides a degradable high-strength resin water shutoff agent, which is prepared from the following raw materials in parts by weight:
79.2 to 88.6 parts of epoxy plant residual oil, 5.4 to 13.2 parts of curing agent, 0.8 to 1.8 parts of initiator, 4.2 to 4.8 parts of flexibilizer and 0.5 to 1.2 parts of reinforcing agent, wherein the sum of the parts by weight of the components is 100 parts.
The second aspect of the invention provides a preparation method of a degradable high-strength resin water shutoff agent, which comprises the following steps:
and mixing the epoxy plant residual oil and the curing agent, uniformly stirring, adding the initiator, the toughening agent and the reinforcing agent, and continuously uniformly stirring to obtain the degradable high-strength resin water shutoff agent.
The third aspect of the invention provides an application of a degradable high-strength resin water shutoff agent, which is applied to the plugging of high-temperature high-salinity carbonate rock fracture oil reservoirs.
Compared with the prior art, the invention has the beneficial effects that:
the degradable high-strength resin water shutoff agent prepared by using the epoxy plant residual oil provided by the invention has the advantages of high strength, degradability, excellent plugging performance, deepening property, strong dilution resistance, low price and the like, can effectively solve the problem of high water content of an oil well, is used for plugging a high-temperature high-salinity carbonate rock fracture oil reservoir, and has important significance on casing damage well repair and water shutoff fracturing technologies.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a degradable high-strength resin water shutoff agent, which is prepared from the following raw materials in parts by weight:
79.2 to 88.6 parts of epoxy plant residual oil, 5.4 to 13.2 parts of curing agent, 0.8 to 1.8 parts of initiator, 4.2 to 4.8 parts of flexibilizer and 0.5 to 1.2 parts of reinforcing agent, wherein the sum of the parts by weight of the components is 100 parts.
In this embodiment, the epoxidized plant oil residue is obtained by dehydrating a plant oil residue and then modifying the epoxidation of unsaturated carbon-carbon double bonds in the molecule. In some preferred embodiments of the present invention, the epoxy value of the epoxidized vegetable oil residue is 5.5% to 6.5%, and further 6.2% to 6.5%, within which range the resulting water shutoff agent can have better performance and lower cost.
In some embodiments of the invention, the epoxidized vegetable oil residue is obtained by the steps of: dehydrating the plant residual oil, wherein the molar weight of the plant residual oil is calculated by the average molar number of each effective component in the plant residual oil, and the plant residual oil is prepared by the following steps: formic acid: the mol ratio of the hydrogen peroxide is 1 (2-4) to (7-9), the plant residual oil, the formic acid and the hydrogen peroxide are weighed, and then Al accounting for 3-5 percent of the total mass of the plant residual oil, the formic acid and the hydrogen peroxide is weighed 3+ The resin catalyst is stirred and reacted for 3 to 5 hours at the temperature of between 50 and 80 ℃, and then the epoxy plant residual oil is obtained by alkali washing and water washing purification. Wherein the plant isThe water content of the dehydrated residual oil is less than or equal to 1 percent; the mass fraction of formic acid is 80-98%, and the mass fraction of hydrogen peroxide is 28-35%; al (Al) 3+ The resin catalyst can be D151 macroporous weak acid cation exchange resin, IRA96RF macroporous ion exchange resin or D072H strong acid cation exchange resin; the stirring speed is 300-500 r/min.
Further, the content of the plant residue includes: 45-50% of water, 20-25% of phospholipid and 25-30% of neutral oil, wherein the dehydrated phospholipid and neutral oil mainly contain a large amount of unsaturated double bonds in molecules.
Furthermore, the plant residual oil is residual oil residue in the preparation process of the soybean oil, and the dehydrated effective components of the plant residual oil comprise: lecithin, phosphatidic acid, glycerol trioleate, glycerol oleic acid dilinoleate, palmitic acid dilinoleate, linoleic acid dilinoleate and glycerol-palmitic acid-oleic acid-linoleate.
In the embodiment, the curing agent is selected from one or a combination of ethylenediamine, diethylenetriamine and dicyandiamide; compared with other types of curing, the amine curing agent is selected, so that the compressive strength of the water shutoff agent can be obviously improved. The initiator is selected from 2-ethyl-4-methylimidazole; the toughening agent is selected from acrylic rubber; the reinforcing agent is selected from polyamide fibers.
Further, the degradable high-strength resin water shutoff agent is prepared from the following raw materials in parts by weight: 79.2 to 82.4 parts of epoxy plant residual oil, 10.3 to 13.2 parts of curing agent, 1.4 to 1.6 parts of initiator, 4.8 parts of flexibilizer and 1.1 to 1.2 parts of reinforcing agent, wherein the sum of the parts by weight of the components is 100 parts. Within the content range, the obtained degradable high-strength resin water plugging agent has the highest compressive strength after being gelled.
In the actual use process, the system components can be properly adjusted according to well conditions, well types, formation water quality conditions and the like.
The second aspect of the invention provides a preparation method of a degradable high-strength resin water shutoff agent, which comprises the following steps:
and mixing the epoxy plant residual oil and the curing agent, uniformly stirring, adding the initiator, the toughening agent and the reinforcing agent, and continuously uniformly stirring to obtain the degradable high-strength resin water shutoff agent.
In the present embodiment, the stirring rate is 300 to 500r/min.
The third aspect of the invention provides an application of a degradable high-strength resin water shutoff agent, which is applied to the plugging of high-temperature high-salinity carbonate rock fracture oil reservoirs.
Furthermore, the oil deposit temperature is 120-130 deg.C, and the salinity is 22X 10 4 ～23×10 4 mg/L, the gelling time of the water shutoff agent is 3 to 16 hours, and the compressive strength is 21.3 to 59.7MPa
Furthermore, the water shutoff agent can be completely degraded within 16-72 hours when the temperature is 120-130 ℃ and 10% sodium hydroxide solution is added.
For avoiding redundancy, in the following examples of the present invention, the epoxy plant oil residue was obtained by the following processes:
dehydrating the plant residual oil until the water content is less than or equal to 1 percent, according to the weight percentage of the plant residual oil: formic acid: the molar ratio of hydrogen peroxide is 1 3+ A resin catalyst (D151) is stirred and reacted for 4 hours at the temperature of 60 ℃, and then the epoxy plant residual oil (the epoxy value is 6.3 percent) is obtained through alkali washing and water washing purification; wherein, the plant residual oil is residual oil foot in the preparation process of the soybean oil, and the effective components after dehydration comprise: 16.638% of lecithin, 23.546% of phosphatidic acid, 26.293% of glycerol trioleate, 8.904% of glycerol oleic acid dilinoleate, 4.339% of palmitic acid dilinoleate, 7.756% of linoleic acid dilinoleate and 11.324% of glycerol-palmitic acid-oleic acid-linoleate, wherein the average mole number of the effective components is 5.6g/mol.
Example 1
Adding 88.4g of epoxy plant residual oil into a 150ml beaker, slowly adding 5.4g of ethylenediamine into the beaker at the stirring speed of 500r/min, and uniformly stirring; then sequentially adding 1.2g of 2-ethyl-4-methylimidazole, 4.5g of acrylic rubber and 0.5g of polyamide fiber into a beaker, adjusting the stirring speed to 300r/min, and continuously stirring for 1.5h to obtain a gelling solution; weighing 20g of gelling solution, placing the gelling solution in a pressure-resistant bottle, then placing the bottle in an oil bath kettle at 130 ℃, reacting for 14h, gelling, wherein the compressive strength of the formed oil gel is 21.3MPa, placing the solidified water plugging agent in a 10% sodium hydroxide solution at 130 ℃, and completely degrading within 16 h.
Example 2
Adding 87.2g of epoxy plant residual oil into a 150ml beaker, slowly adding 5.8g of diethylenetriamine into the beaker at a stirring speed of 500r/min, and uniformly stirring; then, sequentially adding 1.4g 2-ethyl-4-methylimidazole, 4.7g acrylic rubber and 0.9g polyamide fiber into a beaker, adjusting the stirring speed to 300r/min, and continuously stirring for 1.5h to obtain a gelling solution; weighing 20g of gelling solution, adding the gelling solution into a pressure-resistant bottle, then placing the bottle in an oil bath kettle at 130 ℃ for reacting for 13h, gelling, wherein the compressive strength of the formed oil gel is 29.6MPa, and placing the cured water plugging agent into a 10% sodium hydroxide solution at 130 ℃ for complete degradation within 23 h.
Example 3
Adding 87.1g of epoxy plant residual oil into a 150ml beaker, slowly adding 6.7g of dicyandiamide into the beaker at the stirring speed of 500r/min, and uniformly stirring; then sequentially adding 1.1g of 2-ethyl-4-methylimidazole, 4.5g of acrylic rubber and 0.6g of polyamide fiber into a beaker, adjusting the stirring speed to 300r/min, and continuously stirring for 1.5h to obtain a gelling solution; weighing 20g of gelling solution, adding the gelling solution into a pressure-resistant bottle, then placing the bottle in an oil bath kettle at 130 ℃ for reacting for 12h, gelling, wherein the compressive strength of the formed oil gel is 36.7MPa, and placing the cured water plugging agent into a 10% sodium hydroxide solution at 130 ℃ for complete degradation within 43 h.
Example 4
Adding 85.2g of epoxy plant residual oil into a 150ml beaker, slowly adding 5.4g of ethylenediamine and 3.2g of diethylenetriamine into the beaker at a stirring speed of 500r/min, and uniformly stirring; then sequentially adding 1.2g of 2-ethyl-4-methylimidazole, 4.2g of acrylic rubber and 0.8g of polyamide fiber into a beaker, adjusting the stirring speed to 300r/min, and continuously stirring for 1.5h to obtain a gelling solution; weighing 20g of gelling solution, adding the gelling solution into a pressure-resistant bottle, then placing the bottle in an oil bath kettle at 130 ℃ for reacting for 8h, gelling, wherein the compressive strength of the formed oil gel is 43.6MPa, and placing the cured water plugging agent into a 10% sodium hydroxide solution at 130 ℃ for complete degradation within 39 h.
Example 5
Adding 82.4g of epoxy plant residual oil into a 150ml beaker, slowly adding 10.3g of diethylenetriamine into the beaker at a stirring speed of 500r/min, and uniformly stirring; then, sequentially adding 1.4g of 2-ethyl-4-methylimidazole, 4.8g of acrylic rubber and 1.1g of polyamide fiber into a beaker, adjusting the stirring speed to 300r/min, and continuously stirring for 1.5h to obtain a gelling solution; weighing 20g of gelling solution, adding the gelling solution into a pressure-resistant bottle, then placing the bottle in an oil bath kettle at 130 ℃, gelling after 5h, wherein the compressive strength of the formed oil gel is 52.6MPa, and the solidified water plugging agent is placed in a 10% sodium hydroxide solution at the temperature of 130 ℃ and can be completely degraded within 48 h.
Example 6
Adding 79.2g of epoxy plant residual oil into a 150ml beaker, slowly adding 13.2g of dicyandiamide into the beaker at the stirring speed of 500r/min, and uniformly stirring; then sequentially adding 1.6g of 2-ethyl-4-methylimidazole, 4.8g of acrylic rubber and 1.2g of polyamide fiber into a beaker, adjusting the stirring speed to 300r/min, and continuously stirring for 1.5h to obtain a gelling solution; weighing 20g of gelling solution, adding the gelling solution into a pressure-resistant bottle, then placing the bottle in an oil bath kettle at 130 ℃, gelling after 3h, wherein the compressive strength of the formed oil gel is 59.7MPa, and the solidified water plugging agent is placed in a 10% sodium hydroxide solution at the temperature of 130 ℃ and can be completely degraded within 72 h.
Comparative example 1
The curing agent of example 6 was replaced with phthalic anhydride and the other components, amounts and reaction conditions were the same as in example 6. The gelling time is 16h, the compressive strength of the formed oil gel is 15.4MPa, the temperature is 130 ℃, and the mineralization degree is 22 multiplied by 10 4 Aging for 30 days in mg/L simulated formation environment, the retention rate of the water plugging agent is 10%, and the plugging performance is lost.
Comparative example 2
The epoxy plant residue of example 6 was replaced with bisphenol a type epoxy resin, and the other components, amounts and reaction conditions were the same as those of example 6. The gelling time is 2h, the compressive strength after curing is 42.3MPa, the water plugging agent after curing is placed in a 10% sodium hydroxide solution and soaked for 30d, and the degradation rate of the water plugging agent is lower than 5%.
Comparative example 3
The epoxy plant residue of example 6 was replaced with an epoxy plant residue having an epoxy value of 5%, and the other components, amounts and reaction conditions were identical to those of example 6. The gel forming time is 30h, the compressive strength after curing is 2.34MPa, the temperature is 130 ℃, and the mineralization degree is 22 multiplied by 10 4 Aging for 30 days in mg/L simulated formation environment, the retention rate of the water plugging agent is 42.3 percent, and the plugging performance is lost.
Example 7
The plugging capability of the plugging agent to be studied was examined by taking the plugging agent formulations of example 5 and example 6 as study objects, which are respectively marked as # 1 and # 2. The experimental procedure was as follows: the sand filling pipe with the length of 30cm and the diameter of phi 2.5cm is filled with stones with the diameter of 5-8 mm. Carrying out water injection displacement on the sand filling pipe at a displacement speed of 1mL/min, and measuring the original permeability k after the pressure is stable 0 . And (3) measuring the plugging rate, injecting diesel oil with the volume of 0.25PV, then respectively injecting the gelling solutions with the volumes of 0.5PV in the examples 5 and 6, then injecting simulated formation water with the volume of 0.25PV, aging in an oven at 130 ℃ for 1 day and 60 days, then performing water injection displacement on the sand filling pipe at the displacement speed of 1mL/min, and measuring the permeability k after plugging after pressure stabilization 1 Using the formula E = (k) 0 -k 1 )/k 0 The core plugging rate E after the oil gel solution is injected is calculated by multiplying by 100%, and the experimental result is shown in Table 1.
TABLE 1 plugging Rate of different systems of plugging agents
The results show that: the plugging agent is aged for 60 days in a simulated formation environment, and the plugging rates of the plugging agent formulas of the examples 5 and 6 are higher than 97%, which shows that the plugging agent has excellent thermal stability and plugging performance.
Compared with the prior art, the invention has the following beneficial effects:
(1) The epoxy plant residual oil selected by the invention is obtained by epoxidizing and modifying dehydrated plant residual oil, has the characteristics of wide source, low price, environmental friendliness, degradability and the like, and has important significance in the aspects of economy and environment;
(2) The invention mainly utilizes epoxy plant residual oil and curing agent to generate chemical reaction to form a body structure; the epoxy plant residual oil contains a large amount of epoxy groups, the curing agent contains strong-polarity amine, the epoxy groups are subjected to ring opening under the action of the initiator in a high-temperature environment, and then are mutually associated with the amine in the curing agent to form macromolecules with a net structure, and as the molecules of the curing agent are small, the softening long-chain structure does not exist, the three-dimensional net structure is compact, and the compressive strength of the formed colloid is high;
(3) The water shutoff agent is a liquid homogeneous system, the initial viscosity of the resin is low, no diluent is required to be added, and the operation is convenient; the water shutoff agent is a plant base, so that the damage to the stratum is small; the water shutoff agent system has no particles, has excellent penetration performance, can enter tiny fine gaps, has excellent penetration performance, and can realize remote plugging adjustment; the water shutoff agent system is not only suitable for plugging a high-temperature high-salinity carbonate fractured reservoir, but also can be applied to a water shutoff fracturing technology and a casing damage well repairing technology;
(4) The water shutoff agent is an oily water shutoff agent insoluble in oil and water, can not be diluted by the oil and water after being injected into a stratum, and can not be influenced by salt ions, and the water shutoff agent is aged for 60 days under the high-temperature condition, so that the shutoff strength is almost unchanged;
(5) The water shutoff agent is mainly polymerized in the form of ester bonds and ether bonds, the ether bonds and the ester bonds can be decomposed in a strong alkaline environment, the water shutoff agent can be completely degraded by adding 10% sodium hydroxide solution to soak for 72 hours at the temperature of 130 ℃, the water shutoff agent is a non-acid system, the solution after the water shutoff is similar to oil and water in properties, the oil reservoir can not be damaged, the operation cost is reduced, and the price is low.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (6)
1. The degradable high-strength resin water shutoff agent is characterized by comprising the following raw materials in parts by weight: 79.2-88.6 parts of epoxy plant residual oil, 5.4-13.2 parts of curing agent, 0.8-1.8 parts of initiator, 4.2-4.8 parts of toughening agent and 0.5-1.2 parts of reinforcing agent, wherein the sum of the parts by weight of the components is 100 parts; wherein the content of the first and second substances,
the epoxy plant residual oil is obtained by dehydrating the plant residual oil and then epoxidizing and modifying unsaturated carbon-carbon double bonds in molecules; the epoxy value of the epoxy plant residual oil is 5.5-6.5%; the plant residual oil is residual oil foot in the preparation process of the soybean oil, and the dehydrated effective components comprise: lecithin, phosphatidic acid, glycerol trioleate, glycerol oleic acid dilinoleate, palmitic acid dilinoleate, linoleic acid dilinoleate, glycerol-palmitic acid-oleic acid-linoleate;
the curing agent is selected from one or a combination of ethylenediamine, diethylenetriamine and dicyandiamide; the initiator is selected from 2-ethyl-4-methylimidazole; the toughening agent is selected from acrylic rubber; the reinforcing agent is selected from polyamide fibers.
2. The degradable high-strength resin water shutoff agent according to claim 1, wherein the epoxy plant residue is obtained by the steps of: dehydrating the plant residual oil, wherein the molar weight of the plant residual oil is calculated by the average molar number of each effective component in the plant residual oil, and the plant residual oil is prepared by the following steps: formic acid: the molar ratio of the hydrogen peroxide is 1 (2) - (4) (7) - (9), the plant residual oil, the formic acid and the hydrogen peroxide are weighed, and then Al accounting for 3% -5% of the total mass of the plant residual oil, the formic acid and the hydrogen peroxide is weighed 3+ And (3) stirring the resin catalyst at 50 to 80 ℃ for reaction for 3 to 5 hours, and then carrying out alkali washing and water washing for purification to obtain the epoxy plant residual oil.
3. The degradable high-strength resin water shutoff agent according to claim 2, wherein the formic acid is in a form of formic acidThe mass fraction of the hydrogen peroxide is 80-98%, and the mass fraction of the hydrogen peroxide is 28-35%; al (aluminum) 3+ The resin catalyst can be D151 macroporous weak acid cation exchange resin, IRA96RF macroporous ion exchange resin or D072H strong acid cation exchange resin.
4. The degradable high-strength resin water shutoff agent according to claim 1, which is prepared from the following raw materials in parts by weight: 79.2 to 82.4 parts of epoxy plant residual oil, 10.3 to 13.2 parts of curing agent, 1.4 to 1.6 parts of initiator, 4.8 parts of flexibilizer and 1.1 to 1.2 parts of reinforcing agent, wherein the sum of the parts by weight of the components is 100 parts.
5. A preparation method of the degradable high-strength resin water shutoff agent as claimed in any one of claims 1 to 4, which is characterized by comprising the following steps:
mixing epoxy plant residual oil and a curing agent, uniformly stirring, then adding an initiator, a toughening agent and a reinforcing agent, and continuously and uniformly stirring to obtain the degradable high-strength resin water plugging agent.
6. The use of the degradable high-strength resin water shutoff agent according to any one of claims 1 to 4, wherein the degradable high-strength resin water shutoff agent is used for plugging high-temperature high-salinity carbonate fractured reservoirs.
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| CN114876432B (en) * | 2022-05-26 | 2023-03-31 | 燕山大学 | Fractured oil-gas reservoir hot fluid mixing and injecting in-situ residual oil water plugging process and device |
| CN116042198A (en) * | 2023-01-30 | 2023-05-02 | 西南石油大学 | Temperature response type bio-based temporary plugging agent and preparation method thereof |
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| WO2016093800A1 (en) * | 2014-12-09 | 2016-06-16 | Halliburton Energy Services, Inc. | Composition including a glycerol ester including at least two epoxides for treatment of subterranean formations |
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