CN113249102B - Slow cross-linking gel for profile control of medium-high temperature oil reservoir and preparation method thereof - Google Patents
Slow cross-linking gel for profile control of medium-high temperature oil reservoir and preparation method thereof Download PDFInfo
- Publication number
- CN113249102B CN113249102B CN202110381322.5A CN202110381322A CN113249102B CN 113249102 B CN113249102 B CN 113249102B CN 202110381322 A CN202110381322 A CN 202110381322A CN 113249102 B CN113249102 B CN 113249102B
- Authority
- CN
- China
- Prior art keywords
- percent
- profile control
- high temperature
- medium
- gel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—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
-
- 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
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/882—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/887—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
-
- 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
- C09K2208/10—Nanoparticle-containing well treatment fluids
Landscapes
- 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)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a slow cross-linking gel for profile control of a medium-high temperature oil reservoir and a preparation method thereof, wherein the gel comprises the following components in percentage by mass: 0.4 to 1.0 percent of main agent, 0.2 to 1.0 percent of cross-linking agent, 0.05 to 0.2 percent of catalyst, 0.3 to 1.0 percent of stabilizer, 0.025 to 0.1 percent of accelerant and the balance of water, wherein the sum of the components is 100 percent. The main agent is acrylamide/2-acrylamide-2-methylpropanesulfonic acid (AM-AMPS) copolymer, the cross-linking agent is melamine formaldehyde resin, the catalyst is ammonium chloride, the stabilizing agent is acidic silica sol, and the accelerating agent is hydroquinone. The slow cross-linking gel for profile control of medium-high temperature oil reservoir is suitable for being used at the temperature of between 90 and 110 ℃ and the mineralization degree of 1.0 multiplied by 10 5 ～4.0×10 5 mg/L oil layer water shutoff profile control, gelling time is controllable within 72-168 hours, the formed jelly has high strength, can reach G-I level, has good stability, and can meet the requirements of deep profile control field operation.
Description
Technical Field
The invention relates to the field of oilfield chemistry, in particular to a slow crosslinking gel for profile control of a medium-high temperature oil reservoir, which can be used as a water plugging agent for high-dose plugging or deep profile control.
Background
In the later stage of oilfield flooding development, due to the reasons of reservoir heterogeneity, oil-water flow difference and the like, water channeling often occurs in an oil well, and the water content is increased sharply. The premature water channeling of the oil well can cause the reservoir swept volume to be small, the recovery ratio to be low, and simultaneously, the problems of large sewage treatment capacity, pipeline corrosion and the like are caused, the oil extraction cost is increased, and the environmental pollution is easily caused. The profile control and water shutoff is an important technology for controlling water and stabilizing oil in a high water-cut oil field, and the key is a shutoff agent. The jelly is the most commonly used plugging agent for profile control and water plugging of oil-water wells and is generated by reacting a water-soluble polymer with a cross-linking agent under certain conditions. The commonly used water-soluble polymer is partially hydrolyzed polyacrylamide, and the crosslinking agent includes inorganic crosslinking agents (such as chromium, zirconium and aluminum), phenolic crosslinking agents, polyethyleneimine and the like. However, when profile control and water shutoff are carried out on oil reservoirs at medium and high temperatures (90-110 ℃), the problems that the plugging fails due to the thermal decomposition of polymers, the gelling is too fast to meet the technical requirements of large dosage or deep profile control and the like often exist. In addition, the high-temperature oil reservoir in China is often accompanied by the problem of high salinity, and the high mineralization can cause the dehydration shrinkage of jelly, so that the plugging fails. The problems are all the problems to be solved in the research of the gel plugging agent.
Patents on gels containing chromium are reported, for example: patent CN104910883A discloses a delayed crosslinking chromium gel profile control water plugging agent. The blocking agent consists of 0.3 to 0.8 percent of partially hydrolyzed polyacrylamide, 0.02 to 0.20 percent of sodium dichromate, 0.15 to 0.50 percent of additive and water. Although the plugging agent has high gelling strength and good thermal stability at 80 ℃, the gelling time of the chromium gel is difficult to regulate and control, which is not beneficial to deep profile control, and Cr 3+ Has high toxicity and is gradually limited to use.
The phenolic crosslinking agent may be composed of a combination of a phenol (phenol, hydroquinone, resorcinol, etc.) and an aldehyde (formaldehyde, paraformaldehyde, urotropine, etc.), or a synthetic industrial product such as a water-soluble phenol resin may be used as it is. The patent CN103232839A discloses a water shutoff agent for water shutoff and profile control of high-temperature and high-salinity oil reservoirs, which adopts a phenolic cross-linking agent, is suitable for oil reservoirs with a temperature of 90-150 ℃, has high gelling strength but short gelling time (less than 2 days), and has strict control and limited field application because formaldehyde, urotropine and the like belong to dangerous chemicals; patent CN106634903A discloses an interpenetrating polymer network gel and its preparation method and application, and patent CN110790959A discloses a water-soluble phenolic resin cross-linking agent low-temperature rapid gelling accelerator and its preparation method and application. The cross-linking agent of the plugging agent adopts water-soluble phenolic resin, the formed gel has good plugging performance and is resistant to scouring, but the cross-linking of the water-soluble phenolic resin and a polymer is too fast, the gelling time is short, the technical requirements of deep profile control or large-dose plugging cannot be met, and in addition, the gel strength is weak and the stability is poor.
Patent CN103232839A reports a gel plugging agent prepared from tannin extract and lignin as raw materials. Although the plugging agent has strong temperature resistance, once the gel is gelled, the gel is difficult to be broken by heat and a gel breaker, the formed gel is brittle and lacks elasticity, and the effective plugging is difficult to form due to weak adhesion. And plugging measures by precipitation, for example, patent CN102040975A discloses a silicate plugging agent, which is prepared conveniently and cheaply by sodium silicate, aluminum sulfate, calcium chloride, starch and cement, but has short gelling time at high temperature and is not beneficial to field application. Therefore, the development of the stable water shutoff system which is suitable for the profile control of the medium-high temperature oil reservoir and can slowly gelatinize has important significance and application value for further improving the recovery ratio.
Disclosure of Invention
Aiming at the defects of the prior art, particularly the gel forming time of the gel plugging agent is fast, and the technical requirements of large-dose plugging or deep profile control are difficult to meet. The invention preferably selects melamine formaldehyde resin which is slowly crosslinked with a water-soluble polymer as a crosslinking agent, and provides the jelly which grows at 90-110 ℃ and has better stability after the jelly is formed by adding a low-dose phenol accelerator and nano particles, and the preparation method thereof.
The technical scheme of the invention is as follows:
the slow cross-linking gel for profile control of medium-high temperature oil reservoirs comprises a main agent, a cross-linking agent, a catalyst, a stabilizer, an accelerant and water, and comprises the following components in percentage by mass:
0.4 to 1.0 percent of main agent, wherein the main agent is acrylamide/2-acrylamide-2-methylpropanesulfonic acid (AM-AMPS) copolymer;
0.2 to 1.0 percent of cross-linking agent, wherein the cross-linking agent is melamine formaldehyde resin;
0.05-0.2% of catalyst, wherein the catalyst is ammonium chloride or acetic acid;
0.3 to 1.0 percent of stabilizer, wherein the stabilizer is acid silica sol;
0.025 to 0.1 percent of accelerator, wherein the accelerator is one of phenol, hydroquinone and resorcinol;
the balance of water;
the sum of the mass percentages of the components is 100 percent.
According to the invention, preferably, the main agent is acrylamide/2-acrylamide-2-methylpropanesulfonic acid (AM-AMPS) copolymer;
the relative molecular weight of the preferred acrylamide/2-acrylamide-2-methylpropanesulfonic acid (AM-AMPS) copolymer is 800 to 1800 ten thousand, more preferably 1200 to 1500 ten thousand; the degree of hydrolysis is 20% to 30%, more preferably 25% to 30%.
According to the present invention, preferably, the catalyst is ammonium chloride or acetic acid, more preferably ammonium chloride.
According to the invention, the stabilizer is preferably an acidic silica sol with a particle size of 5 to 50nm, more preferably 10 to 14nm.
According to the present invention, preferably, the promoter is one of phenol, hydroquinone and resorcinol, and hydroquinone is more preferred.
According to the invention, it is preferred that the water has a degree of mineralization of 1.0X 10 5 ～4.0×10 5 mg/L formation water.
According to the invention, preferably, the slow crosslinking gel for profile control of the medium-high temperature oil reservoir has the gelling time of 72-168 hours and the gelling strength of G grade or above.
According to the invention, preferably, the slow cross-linking gel for profile control of the medium-high temperature oil reservoir comprises the following components in percentage by mass:
0.5 to 0.7 percent of acrylamide/2-acrylamide-2-methylpropanesulfonic acid (AM-AMPS) copolymer;
0.4 to 0.6 percent of melamine formaldehyde resin;
0.05 to 0.1 percent of ammonium chloride;
1.0 percent of acidic silica sol;
0.025 percent to 0.05 percent of hydroquinone;
the balance of water;
the sum of the mass percentages of the components is 100 percent.
According to the invention, the effect of the components is as follows:
the acrylamide/2-acrylamide-2-methylpropanesulfonic acid (AM-AMPS) copolymer used in the invention is a temperature-resistant polymer, is not easy to decompose under medium-high temperature conditions, and has more excellent temperature resistance than HPAM. The melamine formaldehyde resin cross-linking agent used is slow in cross-linking with the polymer, can keep a low-viscosity state for a long time under the condition of high temperature in the gel-forming liquid, and provides enough operation time for large-dose or deep profile control.
The preferable accelerator is preferably hydroquinone, which is a free radical trapping agent, and can react with a small amount of formaldehyde generated by decomposing the melamine formaldehyde resin under an acidic condition and amide groups which do not participate in crosslinking on the molecular weight of the polymer, so that the grid density of the crosslinked polymer is improved, the degradation of the amide groups at a high temperature is effectively reduced, and the stability of the jelly is enhanced.
The catalyst used in the invention mainly plays a role in adjusting the pH value of the glue solution. Keeping the subacidity of the glue-forming solution and ensuring the crosslinking environment of the melamine formaldehyde resin. In addition, the oxidation of the accelerant in the processes of liquid preparation, storage and transportation can be reduced, and the action effect of the accelerant is ensured.
The stabilizer in the invention is acidic silica sol which can form hydrogen bonds with hydrophilic groups in the polymer and is attached among polymer molecular chains to increase the grid strength of the jelly glue, thereby improving the strength and stability of the jelly glue; the addition of the acidic silica sol can also reduce the pH value of the glue solution, thereby providing a weak acidic environment for the crosslinking of the melamine formaldehyde resin.
According to the invention, the preparation method of the slow cross-linking gel for profile control of the medium-high temperature oil reservoir comprises the following steps:
adding the cross-linking agent, the catalyst, the stabilizer and the accelerator into water according to the proportion, uniformly stirring, finally slowly adding the main agent under the stirring condition, and uniformly stirring to obtain the glue solution.
The medium-high temperature oil reservoir is at a temperature of 90-110 ℃.
The invention has the following beneficial effects:
1. the slow crosslinking gel for profile control of medium-high temperature oil reservoirs is suitable for water shutoff profile control of oil layers at the temperature of 90-110 ℃, improves the stratum water absorption profile, increases the subsequent water flooding wave and volume, and further increases the crude oil recovery ratio.
2. The plugging agent has excellent performance, good gelling effect under medium-high temperature conditions, high strength, good thermal stability and low dehydration rate in brine, and can effectively plug high-water-bearing strata of medium-high temperature oil reservoirs.
3. The invention has long gelling time, adjustable gelling strength, low gelling liquid viscosity and easy injection, and can meet the technical requirements of high-dose profile control or deep profile control.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following specific examples.
As a preference of the embodiment, the plugging agent of the present invention has the following composition: 0.6% of AM-AMPS copolymer, 0.5% of melamine formaldehyde resin, 0.1% of ammonium chloride, 1.0% of acidic silica sol, 0.025% of hydroquinone and the balance of water.
As a preference of the embodiment, the plugging agent of the present invention is composed as follows: 0.6% of AM-AMPS copolymer, 0.4% of melamine formaldehyde resin, 0.05% of ammonium chloride, 1.0% of acidic silica sol, 0.05% of hydroquinone and the balance of water.
All examples are given for the preparation of 100g of product, all examples using water with a degree of mineralization of 1.0X 10 5 ～4.0×10 5 mg/L, the particle diameter of the acidic silica sol is 10-14 nm.
In the following examples, the jelly strength was evaluated by the jelly strength code method. The rating scale is shown in table 1.
TABLE 1 gel strength grade Scale Table
Example 1
Adding 0.5g of melamine formaldehyde resin, 0.1g of ammonium chloride, 1.0g of acidic silica sol and 0.025g of hydroquinone into water according to the proportion, uniformly stirring, finally slowly adding 0.6g of AM-AMPS copolymer under the stirring condition, and fully and uniformly stirring to obtain the glue solution. And (3) placing the gel-forming liquid into an ampoule bottle, sintering and sealing the ampoule bottle by using an alcohol burner, and placing the ampoule bottle into a constant-temperature water bath kettle at 90 ℃ for aging to obtain the jelly.
Example 2
Adding 0.4g of melamine formaldehyde resin, 0.05g of ammonium chloride, 1.0g of acidic silica sol and 0.05g of hydroquinone into water according to the proportion, uniformly stirring, finally slowly adding 0.6g of AM-AMPS copolymer under the stirring condition, and fully and uniformly stirring to obtain the glue solution. And (3) placing the gel-forming liquid into an ampoule bottle, sintering and sealing by using an alcohol burner, and aging in an oven at 110 ℃ to obtain the jelly.
Comparative example 1
Adding 0.5g of melamine formaldehyde resin, 0.1g of ammonium chloride, 1.0g of acidic silica sol and 0.025g of hydroquinone into water according to the proportion, uniformly stirring, finally slowly adding 0.6g of partially hydrolyzed polyacrylamide under the stirring condition, and fully and uniformly stirring to obtain a glue-forming solution. Placing the gel-forming liquid in an ampoule bottle, sintering and sealing with an alcohol burner, and aging in a constant-temperature water bath kettle at 90 deg.C to obtain jelly.
Comparative example 2
Adding 0.5g of melamine formaldehyde resin, 1.0g of acid silica sol and 0.025g of hydroquinone into water according to the proportion, uniformly stirring, finally slowly adding 0.6g of AM-AMPS copolymer under the stirring condition, and fully and uniformly stirring to obtain a glue-forming solution. Placing the gel-forming liquid in an ampoule bottle, sintering and sealing with an alcohol burner, and aging in a constant-temperature water bath kettle at 90 deg.C to obtain jelly.
Comparative example 3
Adding 0.5g of melamine formaldehyde resin, 0.1g of ammonium chloride and 0.025g of hydroquinone into water according to the proportion, uniformly stirring, finally slowly adding 0.6g of AM-AMPS copolymer under the stirring condition, and fully and uniformly stirring to obtain the glue solution. Placing the gel-forming liquid in an ampoule bottle, sintering and sealing with an alcohol burner, and aging in a constant-temperature water bath kettle at 90 deg.C to obtain jelly.
Comparative example 4
Adding 0.5g of melamine formaldehyde resin, 0.1g of ammonium chloride, 0.3g of acidic silica sol and 0.025g of hydroquinone into water according to the proportion, uniformly stirring, finally slowly adding 0.6g of AM-AMPS copolymer under the stirring condition, and fully and uniformly stirring to obtain the glue solution. Placing the gel-forming liquid into an ampoule bottle, sintering and sealing by using an alcohol blast burner, and placing the ampoule bottle in a constant-temperature water bath kettle at 90 ℃ for aging to obtain the jelly.
Comparative example 5
Adding 0.5g of melamine formaldehyde resin, 0.1g of ammonium chloride and 1.0g of acidic silica sol into water according to the proportion, uniformly stirring, finally slowly adding 0.6g of AM-AMPS copolymer under the stirring condition, and fully and uniformly stirring to obtain the glue solution. Placing the gel-forming liquid in an ampoule bottle, sintering and sealing with an alcohol burner, and aging in a constant-temperature water bath kettle at 90 deg.C to obtain jelly.
Comparative example 6
Adding 0.4g of melamine formaldehyde resin, 0.05g of ammonium chloride, 1.0g of acidic silica sol and 0.025g of hydroquinone into water according to the proportion, uniformly stirring, finally slowly adding 0.6g of AM-AMPS copolymer under the stirring condition, and fully and uniformly stirring to obtain the glue solution. And (3) placing the gel forming liquid in an ampoule bottle, sintering and sealing by using an alcohol burner, and aging in an oven at 110 ℃ to obtain the jelly.
Test example 1 gel formation performance investigation:
the jelly obtained in examples 1-2 and comparative examples 1-6 were used as research objects to examine the gelling properties of the jelly provided by the present invention, including gelling time, gelling strength and long-term stability, and the experimental results are shown in table 2.
TABLE 2 examination of gelling Properties
As shown in the experimental results in Table 2, the gel prepared by using the partially hydrolyzed polyacrylamide HPAM as the polymer in the comparative example 1 breaks within 45 days at 90 ℃, and the long-term stability is obviously worse than that of the gel prepared in the example 1; the preparation of the gelatin solution in comparative example 2 is not added with a catalyst, and the jelly does not become a gelatin; the gel of the comparative example 3 is not added with the acid silica sol, the gel forming time is too long, the gel forming strength is low, the strength is reduced in 45 days, and the strength is reduced to gel breaking in 90 days; comparative example 4 reduces the amount of the acidic silica sol, comparative example 5 does not add hydroquinone, the dehydration rate is obviously improved, and the dehydration rate is higher than 10% in 90 days. In example 1, the AM-AMPS copolymer is used as a polymer to prepare the jelly, and ammonium chloride, acidic silica sol and low-dose hydroquinone are added, so that the weak acidity of the jelly forming liquid is ensured, the jelly forming strength is also improved, the stability of the jelly is obviously good, and the jelly is not broken in 90 days. At the temperature of 110 ℃, the dehydration rate of the jelly is still higher than 10 percent after the low-dose hydroquinone is added in the comparative example 6 for 90 days. In example 2, the dosage of hydroquinone is slightly increased, the dehydration rate is lower than 10% in 90 days, and the stability is obviously improved.
Claims (9)
1. The slow crosslinking gel for profile control of the medium-high temperature oil reservoir is characterized by comprising a main agent, a crosslinking agent, a catalyst, a stabilizer, an accelerant and water in percentage by mass, wherein the medium-high temperature oil reservoir is at a temperature of 90-110 ℃:
0.4 to 1.0 percent of main agent, wherein the main agent is acrylamide/2-acrylamide-2-methylpropanesulfonic acid (AM-AMPS) copolymer;
0.2 to 1.0 percent of cross-linking agent, wherein the cross-linking agent is melamine formaldehyde resin;
0.05-0.2% of catalyst, wherein the catalyst is ammonium chloride or acetic acid;
0.3 to 1.0 percent of stabilizer, wherein the stabilizer is acidic silica sol;
0.025 to 0.1 percent of accelerator, wherein the accelerator is one of phenol, hydroquinone and resorcinol;
the balance of water;
the sum of the mass percentages of the components is 100 percent;
the slow crosslinking gel for profile control of the medium-high temperature oil reservoir has the gelling time of 72-168 hours.
2. The slow cross-linking gel for profile control of medium-high temperature oil reservoirs according to claim 1, wherein the relative molecular weight of the acrylamide/2-acrylamide-2-methylpropanesulfonic acid copolymer is 800-1800 ten thousand.
3. The slow cross-linking gel for profile control of medium-high temperature oil reservoirs according to claim 1, wherein the hydrolysis degree of the acrylamide/2-acrylamide-2-methylpropanesulfonic acid copolymer is 20-30%.
4. The slow cross-linking gel for profile control of medium-high temperature oil reservoirs according to claim 1, wherein the catalyst is ammonium chloride.
5. The slow cross-linked gel for profile control of medium-high temperature oil reservoirs according to claim 1, wherein the particle size of the acidic silica sol is 5-50 nm.
6. The slow cross-linking gel for profile control of medium-high temperature oil reservoirs according to claim 1, wherein the accelerator is hydroquinone.
7. The slow cross-linking gel for profile control of medium-high temperature oil reservoirs according to claim 1, wherein the water has a degree of mineralization of 1.0 x 10 5 ～4.0×10 5 mg/L formation water.
8. The slow cross-linked gel for profile control of medium-high temperature oil reservoirs according to claim 1, which comprises the following components in percentage by mass:
0.5 to 0.7 percent of acrylamide/2-acrylamide-2-methylpropanesulfonic acid (AM-AMPS) copolymer;
0.4 to 0.6 percent of melamine formaldehyde resin;
0.05 to 0.1 percent of ammonium chloride;
1.0% of acidic silica sol;
0.025 percent to 0.05 percent of hydroquinone;
the balance of water;
the sum of the mass percentages of the components is 100 percent.
9. The preparation method of the slow cross-linking gel for profile control of the medium-high temperature oil reservoir, which is disclosed by claim 1, comprises the following steps:
adding the cross-linking agent, the catalyst, the stabilizer and the accelerator into water according to the proportion, uniformly stirring, finally slowly adding the main agent under the stirring condition, and uniformly stirring to obtain the glue solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110381322.5A CN113249102B (en) | 2021-04-09 | 2021-04-09 | Slow cross-linking gel for profile control of medium-high temperature oil reservoir and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110381322.5A CN113249102B (en) | 2021-04-09 | 2021-04-09 | Slow cross-linking gel for profile control of medium-high temperature oil reservoir and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113249102A CN113249102A (en) | 2021-08-13 |
| CN113249102B true CN113249102B (en) | 2022-12-27 |
Family
ID=77220491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110381322.5A Active CN113249102B (en) | 2021-04-09 | 2021-04-09 | Slow cross-linking gel for profile control of medium-high temperature oil reservoir and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113249102B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115216282B (en) * | 2022-07-28 | 2023-11-17 | 中海油能源发展股份有限公司 | Black glue plugging agent for high-temperature high-mineralization oil reservoir and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106479463A (en) * | 2016-09-19 | 2017-03-08 | 中国石油大学(华东) | Retarded crosslinking high intensity frozen glue profile-controlling and plugging agent |
| CN106800921A (en) * | 2016-12-02 | 2017-06-06 | 长江大学 | Wide temperature high salinity adjusts stifled all-round frozen glue |
| CN111087990A (en) * | 2018-10-23 | 2020-05-01 | 中国石油化工股份有限公司 | High-temperature-resistant gel plugging agent composition and preparation method and application thereof |
| CN111499793A (en) * | 2020-05-28 | 2020-08-07 | 北京九恒质信能源技术有限公司 | Nano composite polymer and temperature-resistant and salt-resistant profile control agent containing same |
| CN111574978A (en) * | 2020-06-24 | 2020-08-25 | 中国石油大学(华东) | Jelly plugging agent, preparation method and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180119556A (en) * | 2015-12-02 | 2018-11-02 | 사우디 아라비안 오일 컴퍼니 | High temperature crosslinked fracture fluid |
-
2021
- 2021-04-09 CN CN202110381322.5A patent/CN113249102B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106479463A (en) * | 2016-09-19 | 2017-03-08 | 中国石油大学(华东) | Retarded crosslinking high intensity frozen glue profile-controlling and plugging agent |
| CN106800921A (en) * | 2016-12-02 | 2017-06-06 | 长江大学 | Wide temperature high salinity adjusts stifled all-round frozen glue |
| CN111087990A (en) * | 2018-10-23 | 2020-05-01 | 中国石油化工股份有限公司 | High-temperature-resistant gel plugging agent composition and preparation method and application thereof |
| CN111499793A (en) * | 2020-05-28 | 2020-08-07 | 北京九恒质信能源技术有限公司 | Nano composite polymer and temperature-resistant and salt-resistant profile control agent containing same |
| CN111574978A (en) * | 2020-06-24 | 2020-08-25 | 中国石油大学(华东) | Jelly plugging agent, preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113249102A (en) | 2021-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111574977B (en) | Medium-high temperature oil reservoir phenolic gel self-degradation temporary plugging agent and preparation method thereof | |
| CN110903816B (en) | Temperature-resistant salt-resistant high-expansion plugging agent for plugging large cracks and preparation method thereof | |
| CN111040750B (en) | Composite temperature-resistant gel plugging agent, preparation method thereof and application thereof in profile control and water plugging of ultra-deep reservoir | |
| CN106947450B (en) | Deep profile control and flooding agent with low initial viscosity and preparation method thereof | |
| CN109735315B (en) | Environment-friendly delayed crosslinking profile control agent for oil extraction and preparation method and application thereof | |
| CN104449618A (en) | Temperature-resisting salt-tolerant high-temperature self-cross-linking onsite polymerization water plugging gel | |
| CN111410943B (en) | Composite gel well killing rubber plug capable of being quickly gelatinized and weighted at high temperature and preparation method thereof | |
| CN113249102B (en) | Slow cross-linking gel for profile control of medium-high temperature oil reservoir and preparation method thereof | |
| CN110105938B (en) | High-strength slow-crosslinking chromium jelly and preparation method thereof | |
| CN112980412A (en) | Modifying and flooding agent suitable for high-temperature high-salinity heavy oil reservoir and preparation method thereof | |
| CN113897189B (en) | Jelly glue system suitable for high-temperature high-salinity fracture-cavity oil reservoir profile control and application | |
| CN113025292A (en) | High-strength gel temporary plugging agent for plugging horizontal shaft before workover of thermal recovery horizontal well and preparation method thereof | |
| CN105802598B (en) | Modified alkali lignin plural gel blocking agent of a kind of polyacrylonitrile sodium salt and preparation method thereof | |
| CN113234425B (en) | Composite aluminum gel plugging agent for deep profile control of medium-low permeability oil reservoir and preparation method and application thereof | |
| CN113337260A (en) | Cation gel deep profile control system and preparation method thereof | |
| CN114316932B (en) | High-temperature-resistance resident plugging agent | |
| CN107365573B (en) | Preparation method and application of medium-low temperature environment-friendly cross-linking agent | |
| CN113136185A (en) | Organic water plugging gel for low-temperature hypersalinity oil reservoir | |
| CN113088269A (en) | Organic-inorganic composite water shutoff agent | |
| CN114437688B (en) | Plugging agent raw material composition, polymer gel plugging agent, preparation method and application of polymer gel plugging agent and oil reservoir exploitation method | |
| CN113201318B (en) | High-temperature-resistant high-salt-resistant reinforced foam plugging agent and oil reservoir injection method thereof | |
| CN107793685B (en) | Crosslinked polymer weak gel and preparation method and application thereof | |
| CN115703959B (en) | Method for preparing composite gel | |
| CN116218497A (en) | Gel profile control composition, gel profile control agent and application thereof | |
| CN110317289B (en) | Polyacrylamide nano-microsphere profile control agent for oilfield chemical oil extraction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |