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CN-122012048-A - Composite resin plugging composition, and preparation method and application thereof

CN122012048ACN 122012048 ACN122012048 ACN 122012048ACN-122012048-A

Abstract

The invention provides a composite resin plugging composition, a preparation method and application thereof. The composite resin plugging composition is compounded with three resins, namely water-based epoxy resin, polyimide resin and melamine phenolic resin, and is matched with a latent curing agent, a flow type regulator, a first crosslinking agent, a retarder and a filler which are added in a specific formula, has good rheological property before being cured, good temperature resistance, higher compressive strength after being cured at 240 ℃, higher pressure-bearing plugging property on cracks, realizes good plugging effect, and is suitable for plugging construction of ultra-deep fracture-cavity oil reservoirs.

Inventors

  • WANG LONG
  • QI BIAO
  • CHEN XIUPING
  • PU JUN
  • LI WENXIA
  • HE QINGQING

Assignees

  • 中国石油化工股份有限公司
  • 中国石油化工股份有限公司西北油田分公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (18)

  1. 1. A composite resin plugging composition comprises a composite plugging agent, a latent curing agent, a flow pattern regulator, a first cross-linking agent, a retarder, a filler and water; The composite plugging agent comprises the following raw materials of aqueous epoxy resin, amino-terminated polyether, polyimide resin, melamine formaldehyde resin, a second crosslinking agent and a polymer, wherein the amount of the epoxy resin in the aqueous epoxy resin is 10-30 parts, the amount of the amino-terminated polyether is 0.3-0.8 part, the amount of the polyimide resin is 10-20 parts, the amount of the melamine formaldehyde resin is 5-15 parts, the amount of the second crosslinking agent is 0.8-0.2 part and the amount of the polymer is 0.3-0.8 part by weight; The polymer is a copolymer of acrylamide, acrylic acid, N-vinyl pyrrolidone and methacryloxyethyl dimethyl benzyl ammonium halide or a copolymer of acrylamide, acrylic acid, N-vinyl pyrrolidone and methacryloxyethyl dimethyl alkyl ammonium halide.
  2. 2. A composite resin lost circulation composition according to claim 1, wherein the total mass of the raw materials of the composite resin lost circulation composition is 100%, the raw materials of the composite resin lost circulation composition comprising 20-50% by weight of the composite lost circulation agent, 0.5-5.0% by weight of the latent hardener, 0.05-3.0% by weight of the flow pattern regulator, 0.05-2.0% by weight of the first cross-linking agent, 0.5-1.5% by weight of the retarder, 3-10% by weight of the filler and the balance water.
  3. 3. The composite resin lost circulation composition of claim 2, wherein the second crosslinking agent is a mixture of diethylenetriamine and hydroxypropyl methacrylate.
  4. 4. A composite resin plugging composition according to claim 3, wherein the mass ratio of said diethylenetriamine to hydroxypropyl methacrylate in said second crosslinking agent is (2-4): 1-3;% The molar ratio of the acrylamide to the acrylic acid to the N-vinyl pyrrolidone to the methacryloxyethyl dimethyl benzyl ammonium halide or the molar ratio of the acrylamide to the acrylic acid to the N-vinyl pyrrolidone to the methacryloxyethyl dimethyl alkyl ammonium halide in the polymer is (4-2): 3-2): 2-1; Preferably, the molecular weight of the polymer is 15000.
  5. 5. The composite resin plugging composition of claim 4, wherein said composite plugging agent is prepared by: carrying out a first reaction on the aqueous epoxy resin and amine-terminated polyether in water to obtain amine-terminated polyether modified epoxy resin; Mixing the amino-terminated polyether modified epoxy resin, polyimide resin and melamine formaldehyde resin to obtain a resin mixture; and mixing the second cross-linking agent, the polymer and the resin mixture, drying and crushing to obtain the composite resin plugging agent.
  6. 6. The composite resin lost circulation composition of claim 5, wherein the temperature of the first reaction is 70-90 ℃ and/or the duration is 0.5-5 hours.
  7. 7. A composite resin plugging composition according to any one of claims 1 to 6 wherein the latent curative is a diphenyl biguanide compound and/or dicyandiamide.
  8. 8. The composite resin plugging composition according to claim 7, wherein the raw materials of the diphenyl biguanide compound comprise, by weight, 20-30 parts of sodium dicyandiamide, 10-20 parts of diaminodiphenyl sulfone and 5-15 parts of 4,4' -diaminodiphenyl methane.
  9. 9. The composite resin plugging composition of claim 8 wherein the diphenyl biguanide is prepared by the steps of: the dicyandiamide sodium, diamino diphenyl sulfone and 4,4' -diamino diphenyl methane are subjected to a second reaction in an alcohol solvent, and the pH is regulated to be acidic, so that a reaction product solution is obtained; and removing the alcohol solvent in the reaction product solution, washing and drying to obtain the diphenyl biguanide compound.
  10. 10. The composite resin plugging composition of claim 9, wherein the second reaction is carried out in an inert gas atmosphere, and/or The second reaction temperature is 70-90 ℃, and/or the duration is 1-2h, and/or The acidity means that the pH is 4-5.
  11. 11. A composite resin lost circulation composition according to any one of claims 1 to 6 wherein the flow modifier is a weak gel flow modifier and/or nanocellulose; the raw materials of the weak gel flow pattern regulator comprise, by weight, 10-20 parts of xanthan gum, 20-30 parts of acrylic acid, 20-30 parts of 2-acrylamide-2-methylpropanesulfonic acid, 5-15 parts of N-vinyl pyrrolidone, 2-4 parts of an organoboron crosslinking agent and 1-2 parts of an initiator; preferably, the initiator is a mixture of potassium persulfate and dimethyl azodiisobutyrate; preferably, the mass ratio of the potassium persulfate to the dimethyl azodiisobutyrate is (1-3): 2-4.
  12. 12. The composite resin plugging composition of claim 11 wherein said weak gel flow modifier is prepared by the steps of: mixing the xanthan gum, acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid, N-vinyl pyrrolidone and an organoboron crosslinking agent in water, adjusting pH to be neutral, performing a third reaction under the action of an initiator, washing, drying and crushing to obtain the weak gel flow pattern regulator.
  13. 13. The composite resin plugging composition of claim 12, wherein the third reaction is carried out in an inert gas atmosphere, and/or The temperature of the third reaction is 60-80 ℃ and/or the duration is 10-20min.
  14. 14. The composite resin plugging composition of any one of claims 1 to 6, wherein the first crosslinking agent is a mixture of trimethylolethane and propylenediamine, and/or The retarder is at least one of hydroxyethylidene diphosphonic acid, sodium lignin sulfonate and aminotrimethylene phosphonic acid; and/or the filler is a mixture of quartz sand and hydrophilic nano-silica.
  15. 15. The composite resin plugging composition of claim 14 wherein said first crosslinking agent has a mass ratio of trimethylolethane to propylenediamine of 1 (1-3), and/or The retarder is a mixture of the hydroxyethylidene diphosphonic acid and sodium lignin sulfonate in a mass ratio of 1:1, and/or In the filler, the mass ratio of the quartz sand to the hydrophilic nano silicon dioxide is (3-5) (1-2).
  16. 16. The composite resin plugging composition of claim 15, wherein said composite plugging agent has a particle size of 1-3mm, and/or The flow pattern regulator has particle diameter of 1-1.5mm, and/or The particle size of the hydrophilic nano silicon dioxide is 20-100nm.
  17. 17. A method of preparing a composite resin lost circulation composition according to any one of claims 1 to 16 comprising the steps of: And dispersing the composite plugging agent in water, mixing with the cross-linking agent, and adding the latent curing agent, the retarder, the flow pattern regulator and the filler to obtain the composite resin plugging composition.
  18. 18. Use of the composite resin plugging composition according to any one of claims 1 to 16 or the composite resin plugging composition prepared by the method of claim 17 in reservoir plugging; Preferably, the temperature of the application is 160-240 ℃.

Description

Composite resin plugging composition, and preparation method and application thereof Technical Field The invention belongs to the technical field of oil reservoir plugging, and particularly relates to a composite resin plugging composition, a preparation method and application thereof. Background Fracture-cavity oil reservoirs are special type oil reservoirs which take giant, large karst cavities and large cracks as main reservoir spaces, and have strong non-uniformity, anisotropy and multi-scale characteristics compared with sandstone oil reservoirs. Expert scholars at home and abroad have studied more about the leakage of a pore type reservoir and have not performed systematic study on the leakage of a fracture-cavity type reservoir. The Chinese patent application CN116536035A discloses a preparation method of a controllable curing resin plugging system suitable for a malignant lost circulation stratum, resin matrixes are formed by urea resin, phenolic resin and unsaturated polyester resin, and the controllable curing resin plugging system is formed by matching with a curing agent, a solubilizer, a catalyst and the like, is controllable at high temperature and high pressure, can stably plug for a long time, has wide application range for crack size, is difficult to control curing of the resin under the ultra-high temperature condition, and cannot guarantee safe construction conditions. The Chinese patent application CN117567997A discloses a high-temperature-resistant oil-based drilling fluid consolidation plugging material for petroleum drilling, which is prepared by taking water-insoluble and oil-insoluble resin, acid-soluble materials, wetting agents, density regulators and fiber materials as raw materials, can enter a leakage gap to form a filter plug under the carrying of the oil-based drilling fluid, and is bonded and consolidated into a high-strength integral structure under the action of leakage pressure difference, so that the high-temperature-resistant oil-based drilling fluid consolidation plugging material has high stability and good plugging effect, but can only meet the plugging requirement of 150 ℃ under the high-temperature condition. The document 'application of a thermosetting resin plugging slurry system in a Changqing oilfield' reports a thermosetting resin plugging slurry system which is established by taking nonionic epoxy resin, an organic amine thermal consolidation agent, a bridge plug plugging material and a suspension adhesion promoting material as raw materials, and the system has good suspension property, strong retention of a plugging layer, high curing strength of plugging slurry and low construction risk. However, the resin plugging slurry has poor stability under high temperature conditions, and long-term effective plugging cannot be realized. The document 'development and evaluation of high-strength curable resin plugging agent PMMM' reports that the resin plugging slurry developed by taking hexamethoxymethyl melamine resin and a latent curing agent as raw materials has the advantages of simple formula, controllable curing, high strength, certain application prospect in malignant well leakage of a fractured stratum, but poor temperature resistance and limited application in a high-temperature stratum. The current oil and gas exploration and development gradually expands to a deep layer, the conventional plugging agent can not meet the plugging requirement of a complex oil layer, and the development of plugging materials which can resist ultrahigh temperature, have high strength and can maintain long-term stability is urgently required. And the single curable resin is difficult to simultaneously have excellent performances such as high strength, ultrahigh temperature resistance and the like, and is difficult to meet the plugging requirement of an ultra-deep fracture-cavity type oil reservoir. In addition, in order to ensure the construction safety of the plugging site, the curable resin plugging material must also have controllable curing time. Therefore, it is necessary to develop a composite resin plugging system which is applicable to fracture-cavity oil reservoirs and has ultrahigh temperature resistance, high pressure bearing and controllable solidification. Disclosure of Invention The invention aims to solve the problems that the existing curable resin plugging material is difficult to realize high strength, ultrahigh temperature resistance and controllable curing time at the same time, and provides a composite resin plugging composition, a preparation method and application thereof. The composite resin plugging composition has higher strength, can resist high temperature of 240 ℃, has controllable curing time, overcomes the defects of the conventional curable resin plugging material, and can meet the plugging technical requirements of a fracture-cavity type reservoir. In order to achieve the above object, one of the present invention provides a composite resin pluggi