Granular flow regulator as well as preparation method and application thereof

Abstract

The invention discloses a particle flow regulator and a preparation method and application thereof, and belongs to the technical field of oilfield chemistry. The invention discloses a particle flow regulator. Comprising the following components in parts by weight: 0.3-2 parts of aminated carbon quantum dot dispersion liquid, 20-35 parts of water-based organic silicon modified high-temperature-resistant resin emulsion, 2-5 parts of sodium dodecyl diphenyl ether disulfonate, 1-4 parts of caprolactam blocked isophorone diisocyanate, 1-4 parts of polyoxyethylene-polyoxypropylene ether segmented copolymer, 1-3 parts of alkaline silicon-aluminum sol, 0.5-2 parts of silane coupling agent and 0.5-2 parts of sodium tartrate. 0.5 to 2 parts of sulfonated polyether ether ketone, 0.1 to 0.5 part of isothiazolinone derivative and 0.1 to 0.5 part of defoaming agent. In addition, the invention further provides a preparation method of the particle flow regulating agent and application of the particle flow regulating agent in profile control and water plugging of an oil field. The particle flow regulator provided by the invention realizes delayed formation of high-strength and non-flowing plugging particles.

Description

Technical Field

[0001] This invention relates to the field of oilfield chemical technology, specifically to a particulate flow regulator, its preparation method, and its application. Background Technology

[0002] In the later stages of offshore oilfield development, wells generally enter a high water-cut phase, facing severe challenges in water control and oil production stabilization. This is especially true for wells with long horizontal sections, where the high heterogeneity of the reservoir can easily lead to severe uneven production within the horizontal sections, creating localized high-permeability water flow channels. This results in a large amount of injected water or bottom / edge water circulating ineffectively, while the oil-bearing areas with medium to low permeability remain unutilized. This phenomenon not only significantly reduces crude oil recovery efficiency but also drastically increases water treatment costs and platform production load.

[0003] For plugging high-permeability water channels, the industry typically employs injectable granular, gel-based, or polymer microsphere-based water shut-off and profile control agents. However, these traditional plugging agents exhibit significant limitations when applied to offshore reservoirs with high temperature, high salinity, and extreme heterogeneity. Conventional pre-formed rigid particles suffer from poor injectability, easily accumulating near the wellbore to form a filter cake, making it difficult to penetrate deeper into the formation; furthermore, their fixed particle size prevents them from adapting to changes in pore throats, resulting in limited plugging strength. While gel-based plugging agents can be pumped, their gelation time and strength are significantly affected by formation temperature and salinity, exhibiting poor stability under harsh conditions. Once gelled, they remain fixed near the wellbore, hindering deep migration and precise accumulation. Polymer microsphere systems rely on water absorption and expansion to plug pore throats, but the expansion time and ratio are difficult to predict precisely, often leading to premature expansion and near-wellbore accumulation, or insufficient expansion to effectively plug deep throats. The expanded gel particles are elastomers, which may creep under high production pressure differentials, making long-term effective plugging difficult.

[0004] Therefore, current technology urgently needs a novel water shut-off system that can overcome the aforementioned shortcomings. An ideal plugging agent should possess low initial viscosity and excellent injection performance, enabling it to preferentially enter and penetrate high-permeability water channels like a liquid. Simultaneously, its plugging behavior should exhibit intelligent delay and adaptive characteristics, meaning that under specific conditions at depth, a phase transition or reaction should occur, generating high-strength, non-flowing plugging particles in situ. This would achieve precise and long-term plugging of high-permeability zones, forcing subsequent injected fluids to redirect to medium- and low-permeability oil-bearing areas, ultimately increasing swept volume and oil recovery. Therefore, how to achieve the delayed formation of high-strength, non-flowing plugging particles is a technical problem that current technology needs to solve. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a particulate flow regulator, its preparation method and application, thereby solving the technical problem of how to achieve delayed formation of high-strength, non-flowing blocking particles in the prior art.

[0006] To achieve the above-mentioned technical objectives, the present invention provides a particulate flow conditioner, the raw materials of which, by weight, include 0.3-2 parts of aminated carbon quantum dot dispersion, 20-35 parts of waterborne organosilicon modified high-temperature resistant resin emulsion, 2-5 parts of sodium dodecyl diphenyl ether disulfonate, 1-4 parts of caprolactam-blocked isophorone diisocyanate, 1-4 parts of polyoxyethylene-polyoxypropylene ether block copolymer, 1-3 parts of alkaline silica-alumina sol, 0.5-2 parts of silane coupling agent, 0.5-2 parts of sodium tartrate, 0.5-2 parts of sulfonated polyether ether ketone, 0.1-0.5 parts of isothiazolinone derivative, 0.1-0.5 parts of defoamer, and 60-66 parts of water.

[0007] In any embodiment, the raw materials, calculated by weight, include 0.5-1.5 parts of aminated carbon quantum dot dispersion, 25-30 parts of waterborne organosilicon modified high-temperature resistant resin emulsion, 2.5-3.5 parts of sodium dodecyl diphenyl ether disulfonate, 1.5-2.5 parts of caprolactam-blocked isophorone diisocyanate, 1.5-2.5 parts of polyoxyethylene-polyoxypropylene ether block copolymer, 1-2 parts of alkaline silica-alumina sol, 0.8-1.2 parts of silane coupling agent, 0.8-1.2 parts of sodium tartrate, 0.8-1.2 parts of sulfonated polyether ether ketone, 0.2-0.4 parts of isothiazolinone derivative, 0.1-0.3 parts of defoamer, and 60-66 parts of water.

[0008] In any embodiment, the raw materials, calculated by weight, include 1.5 parts of aminated carbon quantum dot dispersion, 28 parts of waterborne organosilicon modified high-temperature resistant resin emulsion, 3 parts of sodium dodecyl diphenyl ether disulfonate, 2 parts of caprolactam-blocked isophorone diisocyanate, 2 parts of polyoxyethylene-polyoxypropylene ether block copolymer, 1.5 parts of alkaline silica-alumina sol, 1 part of silane coupling agent, 1 part of sodium tartrate, 1 part of sulfonated polyether ether ketone, 0.3 parts of isothiazolinone derivative, 0.2 parts of defoamer, and 62.17 parts of water.

[0009] In any embodiment, the silane coupling agent is silane coupling agent KH550.

[0010] In any embodiment, the defoamer is a polyether-modified silicone defoamer.

[0011] In any embodiment, the solid content of the aminated carbon quantum dot dispersion is 18-20%, and the particle size of the carbon quantum dots in the dispersion is 3-10 nm; and / or, the solid content of the aqueous organosilicon-modified high-temperature resistant resin emulsion is 35-40%.

[0012] Furthermore, the present invention also proposes a method for preparing the above-mentioned particulate flow regulator, comprising the following steps: S1. Heat water to 40-50℃, and add sodium dodecyl diphenyl ether disulfonate, polyoxyethylene-polyoxypropylene ether block copolymer, sodium tartrate, sulfonated polyether ether ketone and isothiazolinone derivative in sequence while stirring, and stir until completely dissolved; then add aminated carbon quantum dot dispersion and alkaline silica-alumina sol, and continue stirring at 900-1000 rpm to form an aqueous dispersion; S2. Transfer the aqueous dispersion obtained in step S1 to an emulsifier, add water-based organosilicon modified high-temperature resistant resin emulsion under stirring, and then shear emulsify at a speed of 2800-3000 rpm to form an emulsion base liquid. S3. Under stirring, caprolactam-blocked isophorone diisocyanate, silane coupling agent and defoamer are added sequentially to the emulsion base liquid, and then stirring is continued to obtain the particulate flow conditioner.

[0013] In any embodiment, in step S1, the aqueous dispersion is formed by continuously stirring at a speed of 900-1000 rpm for 15-20 min.

[0014] In any embodiment, the shear emulsification time in step S2 is 10-15 min.

[0015] Furthermore, this invention also proposes the application of the above-mentioned particulate flow regulator or the particulate flow regulator prepared by the above-mentioned preparation method in oilfield profile control and water shut-off.

[0016] Compared with existing technologies, the beneficial effects of this invention include: This invention innovatively employs a thermally triggered blocking crosslinking agent as a chemical timing switch, ensuring that the particle generation reaction is strictly controlled by the formation temperature. Through molecular design, the reaction can be precisely controlled to start approximately 51 hours after reaching the target temperature at deep formation depth, achieving a fundamental shift from "injection-instantaneous reaction" to "delayed, fixed-point reaction." This characteristic ensures that the system can fully penetrate deep, high-permeability channels in a low-viscosity fluid state, subsequently generating plugging particles at predetermined locations. This completely overcomes the drawback of traditional plugging agents prematurely reacting and accumulating near the wellbore, achieving truly precise deep profile control. Under the combined action of all components, especially the aminated carbon quantum dots acting as efficient nucleation centers, the resin crosslinking reaction proceeds in an orderly and rapid manner, ensuring uniform particle generation. Simultaneously, as a nano-framework, it significantly enhances the mechanical strength and compaction resistance of the generated composite particles. The combination of nano-carbon quantum dots and alkaline silica-alumina sol not only optimizes the reaction path but also enhances the structural stability of the final product, achieving delayed formation of high-strength, non-flowing plugging particles. The particle conversion time of the flow modifier at 150℃ and 30000mg / L is 16-121h, which is the time it takes for the solution to demulsify and generate particles under the influence of temperature and salinity. The resulting particles exhibit significantly higher plugging strength than conventional pre-formed particles, making them suitable for deep profile control and water shut-off operations in high-temperature, high-salinity offshore reservoirs, achieving fluid flow diversion and improving oil recovery.

[0017] The aminated carbon quantum dots introduced in this invention play a unique role in nanoscale nucleation and reinforcement. On the one hand, their extremely high specific surface area and abundant surface functional groups can serve as efficient nucleation centers, guiding the resin crosslinking reaction to proceed in an orderly and rapid manner, ensuring uniform particle formation. On the other hand, their superior mechanical properties and rigid structure, acting as a nanoframework, can significantly improve the mechanical strength and compaction resistance of the generated composite particles. This enables the in-situ generated particles to possess strength far exceeding that of traditional physically mixed particles, enabling the formation of stable, non-migrating, high-strength plugs.

[0018] The granular flow regulator of this invention exhibits excellent temperature and salt resistance stability, with each component showing synergistic performance under high-temperature and high-salt environments. The combination of nano-carbon quantum dots and alkaline silica-alumina sol not only optimizes the reaction pathway but also enhances the structural stability of the final product. While achieving precise deep-seated plugging and effective channeling prevention, the low-damage characteristics of this granular flow regulator preserve pathways for subsequent oil recovery measures such as seepage extraction, achieving spatial and temporal synergy between "deep plugging" and "seepage extraction," thus improving the overall effectiveness of high water-cut reservoir management. Attached Figure Description

[0019] Figure 1 This is the present invention. Figure 1These are comparison images of the flow regulator prepared in Example 1 of this invention before and after particle conversion at 150°C. The left image is a photo before particle conversion, and the right image is a photo after particle conversion. Detailed Implementation

[0020] The "range" disclosed in this application is defined by a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, which define the boundaries of a particular range. Ranges defined in this way can include or exclude endpoints and can be arbitrarily combined; that is, any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60~120 and 80~110 are listed for a specific parameter, it is also expected that ranges of 60~110 and 80~120 are also included. Furthermore, if minimum range values ​​of 1 and 2 are listed, and if maximum range values ​​of 3, 4, and 5 are listed, then the following ranges are all expected: 1~3, 1~4, 1~5, 2~3, 2~4, and 2~5. In this application, unless otherwise stated, the numerical range "a~b" represents a shortened representation of any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0~5" indicates that all real numbers between "0~5" have been listed in this article; "0~5" is simply a shortened representation of these numerical combinations. Furthermore, when a parameter is stated as an integer ≥2, it is equivalent to disclosing that the parameter is, for example, an integer such as 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0021] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0022] Unless otherwise specified, the term "or" is inclusive in this application. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, the condition "A or B" is satisfied by any of the following conditions: A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0023] This specific embodiment provides a particulate flow conditioner, the raw materials of which, by weight, include 0.3-2 parts of aminated carbon quantum dot dispersion, 20-35 parts of waterborne organosilicon modified high-temperature resistant resin emulsion, 2-5 parts of sodium dodecyl diphenyl ether disulfonate, 1-4 parts of caprolactam blocked isophorone diisocyanate, 1-4 parts of polyoxyethylene-polyoxypropylene ether block copolymer, 1-3 parts of alkaline silica-alumina sol, 0.5-2 parts of silane coupling agent, 0.5-2 parts of sodium tartrate, 0.5-2 parts of sulfonated polyether ether ketone, 0.1-0.5 parts of isothiazolinone derivative, 0.1-0.5 parts of defoamer, and 60-66 parts of water.

[0024] In some embodiments, a particulate flow conditioner is provided, the raw materials of which, by weight, include 0.5-1.5 parts of aminated carbon quantum dot dispersion, 25-30 parts of waterborne organosilicon-modified high-temperature resistant resin emulsion, 2.5-3.5 parts of sodium dodecyl diphenyl ether disulfonate, 1.5-2.5 parts of caprolactam-blocked isophorone diisocyanate, 1.5-2.5 parts of polyoxyethylene-polyoxypropylene ether block copolymer, 1-2 parts of alkaline silica-alumina sol, 0.8-1.2 parts of silane coupling agent, 0.8-1.2 parts of sodium tartrate, 0.8-1.2 parts of sulfonated polyether ether ketone, 0.2-0.4 parts of isothiazolinone derivative, 0.1-0.3 parts of defoamer, and 60-66 parts of water.

[0025] In some embodiments, a particulate flow regulator is provided, the raw materials of which, by weight, include 1.5 parts of aminated carbon quantum dot dispersion, 28 parts of waterborne organosilicon modified high-temperature resistant resin emulsion, 3 parts of sodium dodecyl diphenyl ether disulfonate, 2 parts of caprolactam-blocked isophorone diisocyanate, 2 parts of polyoxyethylene-polyoxypropylene ether block copolymer, 1.5 parts of alkaline silica-alumina sol, 1 part of silane coupling agent, 1 part of sodium tartrate, 1 part of sulfonated polyether ether ketone, 0.3 parts of isothiazolinone derivative, 0.2 parts of defoamer, and 62.17 parts of water.

[0026] In some embodiments, the silane coupling agent is silane coupling agent KH550, the defoamer is a polyether-modified organosilicon defoamer, the solid content of the aminated carbon quantum dot dispersion is 18-20%, the particle size of the carbon quantum dots in the dispersion is 3-10 nm, and the solid content of the waterborne organosilicon-modified high-temperature resistant resin emulsion is 35-40%.

[0027] Furthermore, this specific embodiment also proposes a method for preparing the above-mentioned particulate flow regulator, including the following steps: S1. Heat water to 40-50℃, and add sodium dodecyl diphenyl ether disulfonate, polyoxyethylene-polyoxypropylene ether block copolymer, sodium tartrate, sulfonated polyether ether ketone and isothiazolinone derivative in sequence while stirring, and stir until completely dissolved; then add aminated carbon quantum dot dispersion and alkaline silica-alumina sol, and stir continuously at 900-1000 rpm for 15-20 min to form an aqueous dispersion; S2. Transfer the aqueous dispersion obtained in step S1 to an emulsifier, add water-based organosilicon-modified high-temperature resistant resin emulsion under stirring, and then shear emulsify at a speed of 2800-3000 rpm for 10-15 min to form an emulsion base liquid. S3. Under stirring, caprolactam-blocked isophorone diisocyanate, silane coupling agent and defoamer are added sequentially to the emulsion base liquid, and then stirring is continued to obtain the particulate flow conditioner.

[0028] This specific embodiment also proposes the application of the above-mentioned particulate flow regulator or the particulate flow regulator prepared by the above-mentioned preparation method in oilfield profile control and water shut-off.

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] In this invention, the terms "some embodiments," "this embodiment," and examples are used to describe a subset of all possible embodiments. However, it is understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0031] If the application documents contain similar descriptions such as "first / second", the following explanation shall be added: In the following description, the terms "first / second / third" are used only to distinguish similar objects and do not represent a specific ordering of objects. It is understood that "first / second / third" may be interchanged in a specific order or sequence where permitted, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein.

[0032] In this embodiment, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, object A and / or object B can represent three situations: object A exists alone, object A and object B exist simultaneously, and object B exists alone.

[0033] The following describes embodiments of this application. The embodiments described below are exemplary and are only used to explain this application, and should not be construed as limiting this application. Where specific techniques or conditions are not specified in the embodiments, they are performed according to the techniques or conditions described in the literature in this field or according to the product instructions. Reagents or instruments used, unless otherwise specified, are all conventional products that can be obtained commercially.

[0034] In the following examples or comparative examples, the aminated carbon quantum dot dispersion has a solid content of 20%, and the particle size of the carbon quantum dots in the dispersion is 3-10 nm. The aqueous organosilicon-modified high-temperature resistant resin emulsion is S-8618, with a solid content of 40%. In the following examples or comparative examples, the aqueous organosilicon-modified high-temperature resistant resin emulsion is model S-8618, the alkaline silica-alumina sol is model GS19C, and other reagents are also sourced from commercially available sources.

[0035] Example 1 This embodiment proposes a particulate flow regulator comprising 1.5g of aminated carbon quantum dot dispersion, 26g of waterborne silicone-modified high-temperature resistant resin emulsion (S-8618), 3.0g of sodium dodecyl diphenyl ether disulfonate, 4.0g of caprolactam-blocked isophorone diisocyanate, 2.0g of polyoxyethylene-polyoxypropylene ether block copolymer, 2.5g of alkaline silica-alumina sol, 1.0g of silane coupling agent (KH550), 1.0g of sodium tartrate, 1.0g of sulfonated polyether ether ketone, 0.3g of isothiazolinone derivative, 0.2g of polyether-modified silicone defoamer, and 60.87g of water.

[0036] This embodiment also proposes a method for preparing the above-mentioned particulate flow conditioner, including the following steps: S1. Heat water to 45°C and place it in a water bath. Add sodium dodecyl diphenyl ether disulfonate, polyoxyethylene-polyoxypropylene ether block copolymer, sodium tartrate, sulfonated polyether ether ketone, and isothiazolinone derivative to the water in sequence and stir until completely dissolved. Then add aminated carbon quantum dot dispersion and alkaline silica-alumina sol and stir continuously at 1000 rpm for 18 minutes to form an aqueous dispersion. S2. Transfer the aqueous dispersion to an emulsifier and slowly add water-based organosilicon-modified high-temperature resistant resin emulsion S-8618 at 600 rpm. After the addition is complete, increase the speed to 3000 rpm and shear at high speed for 12 minutes to form an emulsion base liquid. S3. Under stirring at 650 rpm, caprolactam-blocked isophorone diisocyanate, silane coupling agent KH550, and polyether-modified silicone defoamer are slowly added sequentially to the base liquid. After all the ingredients are added, stirring continues for 40 minutes to obtain the flow regulator. Testing showed that the particle conversion time of this flow regulator at 150℃ and 30000 mg / L mineralization is 18 hours.

[0037] Combination Figure 1 It can be seen that the particles have undergone transformation.

[0038] Example 2 This embodiment proposes a particulate flow regulator comprising 1.0g of aminated carbon quantum dot dispersion, 28g of waterborne silicone-modified high-temperature resistant resin emulsion (S-8618), 3.0g of sodium dodecyl diphenyl ether disulfonate, 2.0g of caprolactam-blocked isophorone diisocyanate, 2.0g of polyoxyethylene-polyoxypropylene ether block copolymer, 1.5g of alkaline silica-alumina sol, 1.0g of silane coupling agent (KH550), 1.0g of sodium tartrate, 1.0g of sulfonated polyether ether ketone, 0.3g of isothiazolinone derivative, 0.2g of polyether-modified silicone defoamer, and 62.97g of water.

[0039] This embodiment also proposes a method for preparing the above-mentioned particulate flow conditioner, including the following steps: S1. Heat water to 45°C and place it in a water bath. Add sodium dodecyl diphenyl ether disulfonate, polyoxyethylene-polyoxypropylene ether block copolymer, sodium tartrate, sulfonated polyether ether ketone, and isothiazolinone derivative to the water in sequence and stir until completely dissolved. Then add aminated carbon quantum dot dispersion and alkaline silica-alumina sol and stir continuously at 1000 rpm for 18 minutes to form an aqueous dispersion. S2. Transfer the aqueous dispersion to an emulsifier and slowly add water-based organosilicon-modified high-temperature resistant resin emulsion S-8618 at 650 rpm. After the addition is complete, increase the speed to 3000 rpm and shear at high speed for 12 minutes to form an emulsion base liquid. S3. Under stirring at 650 rpm, caprolactam-blocked isophorone diisocyanate, silane coupling agent KH550, and polyether-modified silicone defoamer are slowly added sequentially to the base liquid. After all the ingredients are added, stirring continues for 40 minutes to obtain the flow regulator. Testing showed that the particle conversion time of this flow regulator at 150℃ and 30000 mg / L mineralization is 45 h.

[0040] Example 3 This embodiment proposes a particulate flow regulator comprising 1.2g of aminated carbon quantum dot dispersion, 28g of waterborne silicone-modified high-temperature resistant resin emulsion (S-8618), 3.0g of sodium dodecyl diphenyl ether disulfonate, 1.5g of caprolactam-blocked isophorone diisocyanate, 2.0g of polyoxyethylene-polyoxypropylene ether block copolymer, 2.0g of alkaline silica-alumina sol, 1.0g of silane coupling agent (KH550), 1.0g of sodium tartrate, 1.0g of sulfonated polyether ether ketone, 0.3g of isothiazolinone derivative, 0.2g of polyether-modified silicone defoamer, and 63.07g of water.

[0041] This embodiment also proposes a method for preparing the above-mentioned particulate flow conditioner, including the following steps: S1. Heat water to 45°C and place it in a water bath. Add sodium dodecyl diphenyl ether disulfonate, polyoxyethylene-polyoxypropylene ether block copolymer, sodium tartrate, sulfonated polyether ether ketone, and isothiazolinone derivative to the water in sequence and stir until completely dissolved. Then add aminated carbon quantum dot dispersion and alkaline silica-alumina sol and stir continuously at 1000 rpm for 18 minutes to form an aqueous dispersion. S2. Transfer the aqueous dispersion to an emulsifier and slowly add water-based organosilicon-modified high-temperature resistant resin emulsion S-8618 at 600 rpm. After the addition is complete, increase the speed to 3000 rpm and shear at high speed for 12 minutes to form an emulsion base liquid. S3. Under stirring at 650 rpm, caprolactam-blocked isophorone diisocyanate, silane coupling agent KH550, and polyether-modified silicone defoamer are slowly added sequentially to the base liquid. After all the ingredients are added, stirring continues for 40 minutes to obtain the flow regulator. Testing showed that the particle conversion time of this flow regulator at 150℃ and 30000 mg / L mineralization is 61 h.

[0042] Example 4 This embodiment proposes a particulate flow regulator comprising 1.5g of aminated carbon quantum dot dispersion, 28g of waterborne silicone-modified high-temperature resistant resin emulsion (S-8618), 3.0g of sodium dodecyl diphenyl ether disulfonate, 3.0g of caprolactam-blocked isophorone diisocyanate, 2.0g of polyoxyethylene-polyoxypropylene ether block copolymer, 2.0g of alkaline silica-alumina sol, 1.0g of silane coupling agent (KH550), 1.0g of sodium tartrate, 1.0g of sulfonated polyether ether ketone, 0.3g of isothiazolinone derivative, 0.2g of polyether-modified silicone defoamer, and 62.17g of water.

[0043] This embodiment also proposes a method for preparing the above-mentioned particulate flow conditioner, including the following steps: S1. Heat water to 45°C and place it in a water bath. Add sodium dodecyl diphenyl ether disulfonate, polyoxyethylene-polyoxypropylene ether block copolymer, sodium tartrate, sulfonated polyether ether ketone, and isothiazolinone derivative to the water in sequence and stir until completely dissolved. Then add aminated carbon quantum dot dispersion and alkaline silica-alumina sol and stir continuously at 1000 rpm for 18 minutes to form an aqueous dispersion. S2. Transfer the aqueous dispersion to an emulsifier and slowly add water-based organosilicon-modified high-temperature resistant resin emulsion S-8618 at 600 rpm. After the addition is complete, increase the speed to 3000 rpm and shear at high speed for 12 minutes to form an emulsion base liquid. S3. Under stirring at 650 rpm, caprolactam-blocked isophorone diisocyanate, silane coupling agent KH550, and polyether-modified silicone defoamer are slowly added sequentially to the base liquid. After all the ingredients are added, stirring continues for 40 minutes to obtain the flow regulator. Testing showed that the particle conversion time of this flow regulator at 150℃ and 30000 mg / L mineralization is 16 hours.

[0044] Example 5 This embodiment proposes a particulate flow regulator comprising 1.2g of aminated carbon quantum dot dispersion, 28g of waterborne silicone-modified high-temperature resistant resin emulsion (S-8618), 3.0g of sodium dodecyl diphenyl ether disulfonate, 1.0g of caprolactam-blocked isophorone diisocyanate, 2.0g of polyoxyethylene-polyoxypropylene ether block copolymer, 1.8g of alkaline silica-alumina sol, 1.0g of silane coupling agent (KH550), 1.0g of sodium tartrate, 1.0g of sulfonated polyether ether ketone, 0.3g of isothiazolinone derivative, 0.2g of polyether-modified silicone defoamer, and 63.47g of water.

[0045] This embodiment also proposes a method for preparing the above-mentioned particulate flow conditioner, including the following steps: S1. Heat water to 45°C and place it in a water bath. Add sodium dodecyl diphenyl ether disulfonate, polyoxyethylene-polyoxypropylene ether block copolymer, sodium tartrate, sulfonated polyether ether ketone, and isothiazolinone derivative to the water in sequence and stir until completely dissolved. Then add aminated carbon quantum dot dispersion and alkaline silica-alumina sol and stir continuously at 1000 rpm for 18 minutes to form an aqueous dispersion. S2. Transfer the aqueous dispersion to an emulsifier and slowly add water-based organosilicon-modified high-temperature resistant resin emulsion S-8618 at 600 rpm. After the addition is complete, increase the speed to 3000 rpm and shear at high speed for 12 minutes to form an emulsion base liquid. S3. Under stirring at 650 rpm, caprolactam-blocked isophorone diisocyanate, silane coupling agent KH550, and polyether-modified silicone defoamer are slowly added sequentially to the base liquid. After all the ingredients are added, stirring continues for 40 minutes to obtain the flow regulator. Testing showed that the particle conversion time of this flow regulator at 150℃ and 30000 mg / L mineralization is 91 h.

[0046] Example 6 This embodiment proposes a particulate flow regulator comprising 0.8g of aminated carbon quantum dot dispersion, 25g of waterborne silicone-modified high-temperature resistant resin emulsion (S-8618), 3.0g of sodium dodecyl diphenyl ether disulfonate, 1.0g of caprolactam-blocked isophorone diisocyanate, 2.0g of polyoxyethylene-polyoxypropylene ether block copolymer, 2.2g of alkaline silica-alumina sol, 1.0g of silane coupling agent (KH550), 1.0g of sodium tartrate, 1.0g of sulfonated polyether ether ketone, 0.3g of isothiazolinone derivative, 0.2g of polyether-modified silicone defoamer, and 64.67g of water.

[0047] This embodiment also proposes a method for preparing the above-mentioned particulate flow conditioner, including the following steps: S1. Heat water to 45°C and place it in a water bath. Add sodium dodecyl diphenyl ether disulfonate, polyoxyethylene-polyoxypropylene ether block copolymer, sodium tartrate, sulfonated polyether ether ketone, and isothiazolinone derivative to the water in sequence and stir until completely dissolved. Then add aminated carbon quantum dot dispersion and alkaline silica-alumina sol and stir continuously at 1000 rpm for 18 minutes to form an aqueous dispersion. S2. Transfer the aqueous dispersion to an emulsifier and slowly add water-based organosilicon-modified high-temperature resistant resin emulsion S-8618 at 600 rpm. After the addition is complete, increase the speed to 3000 rpm and shear at high speed for 12 minutes to form an emulsion base liquid. S3. Under stirring at 650 rpm, caprolactam-blocked isophorone diisocyanate, silane coupling agent KH550, and polyether-modified silicone defoamer are slowly added sequentially to the base liquid. After all the ingredients are added, stirring continues for 40 minutes to obtain the flow regulator. Testing showed that the particle conversion time of this flow regulator at 150℃ and 30000 mg / L mineralization is 112 h.

[0048] Example 7 This embodiment proposes a particulate flow regulator comprising 1.0g of aminated carbon quantum dot dispersion, 28g of waterborne silicone-modified high-temperature resistant resin emulsion (S-8618), 3.0g of sodium dodecyl diphenyl ether disulfonate, 2.5g of caprolactam-blocked isophorone diisocyanate, 2.0g of polyoxyethylene-polyoxypropylene ether block copolymer, 2.0g of alkaline silica-alumina sol, 1.0g of silane coupling agent (KH550), 1.0g of sodium tartrate, 1.0g of sulfonated polyether ether ketone, 0.3g of isothiazolinone derivative, 0.2g of polyether-modified silicone defoamer, and 62.67g of water.

[0049] This embodiment also proposes a method for preparing the above-mentioned particulate flow conditioner, including the following steps: S1. Heat water to 45°C and place it in a water bath. Add sodium dodecyl diphenyl ether disulfonate, polyoxyethylene-polyoxypropylene ether block copolymer, sodium tartrate, sulfonated polyether ether ketone, and isothiazolinone derivative to the water in sequence and stir until completely dissolved. Then add aminated carbon quantum dot dispersion and alkaline silica-alumina sol and stir continuously at 1000 rpm for 18 minutes to form an aqueous dispersion. S2. Transfer the aqueous dispersion to an emulsifier and slowly add water-based organosilicon-modified high-temperature resistant resin emulsion S-8618 at 600 rpm. After the addition is complete, increase the speed to 3000 rpm and shear at high speed for 12 minutes to form an emulsion base liquid. S3. Under stirring at 650 rpm, caprolactam-blocked isophorone diisocyanate, silane coupling agent KH550, and polyether-modified silicone defoamer are slowly added sequentially to the base liquid. After all the ingredients are added, stirring continues for 40 minutes to obtain the flow regulator. Testing showed that the particle conversion time of this flow regulator at 150℃ and 30000 mg / L mineralization is 28 hours.

[0050] Example 8 This embodiment proposes a particulate flow regulator comprising 0.5g of aminated carbon quantum dot dispersion, 28g of waterborne silicone-modified high-temperature resistant resin emulsion (S-8618), 3.0g of sodium dodecyl diphenyl ether disulfonate, 1.0g of caprolactam-blocked isophorone diisocyanate, 2.0g of polyoxyethylene-polyoxypropylene ether block copolymer, 1.0g of alkaline silica-alumina sol, 1.0g of silane coupling agent (KH550), 1.0g of sodium tartrate, 1.0g of sulfonated polyether ether ketone, 0.3g of isothiazolinone derivative, 0.2g of polyether-modified silicone defoamer, and 65.07g of water.

[0051] This embodiment also proposes a method for preparing the above-mentioned particulate flow conditioner, including the following steps: S1. Heat water to 45°C and place it in a water bath. Add sodium dodecyl diphenyl ether disulfonate, polyoxyethylene-polyoxypropylene ether block copolymer, sodium tartrate, sulfonated polyether ether ketone, and isothiazolinone derivative to the water in sequence and stir until completely dissolved. Then add aminated carbon quantum dot dispersion and alkaline silica-alumina sol and stir continuously at 1000 rpm for 18 minutes to form an aqueous dispersion. S2. Transfer the aqueous dispersion to an emulsifier and slowly add water-based organosilicon-modified high-temperature resistant resin emulsion S-8618 at 600 rpm. After the addition is complete, increase the speed to 3000 rpm and shear at high speed for 12 minutes to form an emulsion base liquid. S3. Under stirring at 650 rpm, caprolactam-blocked isophorone diisocyanate, silane coupling agent KH550, and polyether-modified silicone defoamer are slowly added sequentially to the base liquid. After all the ingredients are added, stirring continues for 40 minutes to obtain the flow regulator. Testing showed that the particle conversion time of this flow regulator at 150℃ and 30000 mg / L mineralization is 121 h.

[0052] Example 9 This embodiment proposes a particulate flow regulator comprising 0.8g of aminated carbon quantum dot dispersion, 26g of waterborne organosilicon modified high-temperature resistant resin emulsion (S-8618), 3.0g of sodium dodecyl diphenyl ether disulfonate, 1.5g of caprolactam-blocked isophorone diisocyanate, 2.0g of polyoxyethylene-polyoxypropylene ether block copolymer, 2.2g of alkaline silica-alumina sol, 1.0g of silane coupling agent (KH550), 1.0g of sodium tartrate, 1.0g of sulfonated polyether ether ketone, 0.3g of isothiazolinone derivative, 0.2g of polyether modified organosilicon defoamer, and 63.77g of water.

[0053] This embodiment also proposes a method for preparing the above-mentioned particulate flow conditioner, including the following steps: S1. Heat water to 45°C and place it in a water bath. Add sodium dodecyl diphenyl ether disulfonate, polyoxyethylene-polyoxypropylene ether block copolymer, sodium tartrate, sulfonated polyether ether ketone, and isothiazolinone derivative to the water in sequence and stir until completely dissolved. Then add aminated carbon quantum dot dispersion and alkaline silica-alumina sol and stir continuously at 1000 rpm for 18 minutes to form an aqueous dispersion. S2. Transfer the aqueous dispersion to an emulsifier and slowly add water-based organosilicon-modified high-temperature resistant resin emulsion S-8618 at 600 rpm. After the addition is complete, increase the speed to 3000 rpm and shear at high speed for 12 minutes to form an emulsion base liquid. S3. Under stirring at 650 rpm, caprolactam-blocked isophorone diisocyanate, silane coupling agent KH550, and polyether-modified silicone defoamer are slowly added sequentially to the base liquid. After all the ingredients are added, stirring continues for 40 minutes to obtain the flow regulator. Testing showed that the particle conversion time of this flow regulator at 150℃ and 30000 mg / L mineralization is 72 hours.

[0054] Comparative Example 1 This comparative example presents a particulate flow conditioner, which is prepared by the following steps: Take 64.67g of water, heat to 45℃ and place in a water bath; add 3.0g of sodium dodecyl diphenyl ether disulfonate, 2.0g of polyoxyethylene-polyoxypropylene ether block copolymer, 1.0g of sodium tartrate, 1.0g of sulfonated polyether ether ketone, and 0.3g of isothiazolinone derivative to the water in sequence, and stir until completely dissolved; then add 2.0g of amino carbon quantum dot dispersion, without adding alkaline silica-alumina sol, and stir continuously at 1000rpm for 18 minutes to form an aqueous dispersion; transfer the aqueous dispersion to an emulsifier, and slowly add 28.0g of waterborne organosilicon-modified high-temperature resistant resin emulsion at 600rpm, and after the addition is complete, increase the speed to 3000rpm and shear at high speed for 12 minutes to form an emulsion base liquid; adjust the base liquid speed to 650rpm, and slowly add 2.0g of caprolactam-blocked isophorone diisocyanate, 1.0g of... The control sample was prepared by adding silane coupling agent KH550 and 0.2g of polyether-modified silicone defoamer, and stirring for another 40 minutes. Tests showed that the particle conversion time of this control sample at 150℃ and 30000mg / L mineralization was 68h, but its plugging strength was significantly reduced.

[0055] Related experiments The plugging strength of the heat-triggered delayed self-generating particle flow modifiers prepared in Examples 1-9 and Comparative Example 1 of this invention was investigated. The specific experimental procedure is as follows: the plugging ability was evaluated using a steel crack model with a length of 300 mm, a crack width of 40 mm, and a crack height of 3 mm.

[0056] For each embodiment and comparative example, the following two sets of parallel experiments were performed: ① 0.4 PV (pore volume of the crack model) of commercially available rubber particles (median particle size 100 mesh) were injected separately, followed by water flooding, and the water flooding equilibrium pressure P was recorded; ② 0.4 PV of flow modifier (corresponding to the product of the embodiment) was injected separately, and then the model was aged at 150°C and 30000 mg / L mineralization until it was completely converted into particles, followed by water flooding, and the water flooding equilibrium pressure P was recorded.

[0057] Table 1. Blocking pressure of flow modifiers and commercially available rubber granules in Examples 1-9 and Comparative Example 1. As shown in Table 1 above, the plugging strength of all embodiments of the present invention is several to tens of times greater than that of commercially available rubber granules. The plugging strength of Comparative Example 1 is significantly lower than that of all other embodiments, demonstrating that the combination of alkaline silica-alumina sol and aminated carbon quantum dots is crucial for forming a high-strength composite particle structure. The lack of silica-alumina sol results in a loose particle structure and severely insufficient mechanical strength. The complete formulation system of the present invention is a necessary condition for achieving excellent plugging performance. This not only highlights the completeness and creativity of the technical solution but also provides solid data support for its application in deep regulation and displacement of high-temperature and high-salinity oil reservoirs.

[0058] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A particulate flow conditioner, characterized in that, The raw materials, calculated by weight, include 0.3-2 parts of aminated carbon quantum dot dispersion, 20-35 parts of waterborne organosilicon modified high-temperature resistant resin emulsion, 2-5 parts of sodium dodecyl diphenyl ether disulfonate, 1-4 parts of caprolactam-blocked isophorone diisocyanate, 1-4 parts of polyoxyethylene-polyoxypropylene ether block copolymer, 1-3 parts of alkaline silica-alumina sol, 0.5-2 parts of silane coupling agent, 0.5-2 parts of sodium tartrate, 0.5-2 parts of sulfonated polyether ether ketone, 0.1-0.5 parts of isothiazolinone derivative, 0.1-0.5 parts of defoamer, and 60-66 parts of water.

2. The particulate flow conditioner according to claim 1, characterized in that, The raw materials, calculated by weight, include 0.5-1.5 parts of aminated carbon quantum dot dispersion, 25-30 parts of waterborne organosilicon modified high-temperature resistant resin emulsion, 2.5-3.5 parts of sodium dodecyl diphenyl ether disulfonate, 1.5-2.5 parts of caprolactam-blocked isophorone diisocyanate, 1.5-2.5 parts of polyoxyethylene-polyoxypropylene ether block copolymer, 1-2 parts of alkaline silica-alumina sol, 0.8-1.2 parts of silane coupling agent, 0.8-1.2 parts of sodium tartrate, 0.8-1.2 parts of sulfonated polyether ether ketone, 0.2-0.4 parts of isothiazolinone derivative, 0.1-0.3 parts of defoamer, and 60-66 parts of water.

3. The particulate flow conditioner according to claim 1, characterized in that, The raw materials, calculated by weight, include 1.5 parts of aminated carbon quantum dot dispersion, 28 parts of waterborne organosilicon modified high-temperature resistant resin emulsion, 3 parts of sodium dodecyl diphenyl ether disulfonate, 3 parts of caprolactam-blocked isophorone diisocyanate, 2 parts of polyoxyethylene-polyoxypropylene ether block copolymer, 2 parts of alkaline silica-alumina sol, 1 part of silane coupling agent, 1 part of sodium tartrate, 1 part of sulfonated polyether ether ketone, 0.3 parts of isothiazolinone derivative, 0.2 parts of defoamer, and 62.17 parts of water.

4. The particulate flow conditioner according to any one of claims 1-3, characterized in that, The silane coupling agent is silane coupling agent KH550.

5. The particulate flow conditioner according to any one of claims 1-3, characterized in that, The defoamer is a polyether-modified silicone defoamer.

6. The particulate flow conditioner according to any one of claims 1-3, characterized in that, The aminated carbon quantum dot dispersion has a solid content of 18-20% and the particle size of the carbon quantum dots in the dispersion is 3-10 nm; and / or, the aqueous organosilicon-modified high-temperature resistant resin emulsion has a solid content of 35-40%.

7. A method for preparing the particulate flow conditioner according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Heat water to 40-50℃, and add sodium dodecyl diphenyl ether disulfonate, polyoxyethylene-polyoxypropylene ether block copolymer, sodium tartrate, sulfonated polyether ether ketone and isothiazolinone derivative in sequence while stirring, and stir until completely dissolved; then add aminated carbon quantum dot dispersion and alkaline silica-alumina sol, and continue stirring at 900-1000 rpm to form an aqueous dispersion; S2. Transfer the aqueous dispersion obtained in step S1 to an emulsifier, add water-based organosilicon modified high-temperature resistant resin emulsion under stirring, and then shear emulsify at a speed of 2800-3000 rpm to form an emulsion base liquid. S3. Under stirring, caprolactam-blocked isophorone diisocyanate, silane coupling agent and defoamer are added sequentially to the emulsion base liquid, and then stirring is continued to obtain the particulate flow conditioner.

8. The method for preparing the particulate flow conditioner according to claim 7, characterized in that, In step S1, the aqueous dispersion is formed by continuously stirring at a speed of 900-1000 rpm for 15-20 minutes.

9. The method for preparing the particulate flow conditioner according to claim 7, characterized in that, In step S2, the shearing emulsification time is 10-15 min.

10. The application of the particulate flow regulator according to any one of claims 1-6 or the particulate flow regulator prepared by the preparation method according to any one of claims 7-9 in oilfield profile control and water shut-off.

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