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CN-121991670-A - Internal catalytic type rapid reaction water-based sand fixing agent and preparation method and application thereof

CN121991670ACN 121991670 ACN121991670 ACN 121991670ACN-121991670-A

Abstract

The invention discloses an internal catalytic type quick-reaction water-based sand-fixing agent, which comprises, by weight, 10% -15% of glycidyl ether, 0.5% -1% of a phase mixing agent, 0.4% -1% of a quick-curing agent and the balance of water. The invention discloses a preparation method of an internal catalytic type rapid reaction water-based sand-fixing agent, which comprises the following specific steps of (1) preparing a rapid curing agent, (2) uniformly mixing glycidyl ether with a formula amount, a phase mixing agent with a formula amount, the rapid curing agent with a formula amount and water with a formula amount at room temperature to obtain the internal catalytic type rapid reaction water-based sand-fixing agent. The invention also discloses application of the internal catalytic type rapid reaction water-based sand-fixing agent in rapid sand-fixing of sand-preventing wells of loose sandstone reservoirs. The invention has the advantages that 1, the problem of uneven injection of a multistage slug system is effectively avoided, 2, the system is high in safety, environmental protection and stability, 3, the waiting time is greatly shortened, and the operation cost is greatly reduced.

Inventors

  • LI JIANDA
  • ZUO JIAQIANG
  • WEI QINGCAI
  • REN JIAMIN
  • GAO XUEFENG
  • LI PENG
  • JIA PEIFENG
  • HAN HONG

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胜利油田分公司

Dates

Publication Date
20260508
Application Date
20241107

Claims (12)

  1. 1. The internal catalytic type quick-reaction water-based sand fixing agent is characterized by comprising the following components in percentage by mass: 10-15% of glycidyl ether, 0.5-1% of a phase mixing agent, 0.4-1% of a rapid curing agent and the balance of water.
  2. 2. The internal catalytic rapid reaction water-based sand consolidation agent of claim 1 wherein the glycidyl ether is one or more of diglycidyl ether, ethylene glycol diglycidyl ether, 1, 4-butanediol diglycidyl ether, resorcinol diglycidyl ether.
  3. 3. The internal catalytic rapid reaction water-based sand consolidation agent according to claim 1, wherein the phase mixing agent is one or more of ethylene glycol monomethyl ether, diethylene glycol methyl ether, triethylene glycol dimethyl ether and tetraethylene glycol dimethyl ether.
  4. 4. The internal catalyzed fast reacting water based sand curing agent of claim 1, wherein the fast curing agent is a long chain alkyl imidazoline.
  5. 5. The internal catalytic rapid reaction water-based sand consolidation agent as claimed in claim 4, wherein the long-chain alkyl imidazoline is one or more of lauric acid imidazoline, oleic acid imidazoline and erucic acid imidazoline, and/or The structural formula of the long-chain alkyl imidazoline is as follows: Wherein: r is one or more of laurylalkyl, olealkyl and erucic acid alkyl.
  6. 6. A method for preparing the internal catalytic rapid reaction water-based sand consolidation agent as claimed in any one of claims 1 to 5, which is characterized by comprising the following specific steps: (1) Preparing a rapid curing agent; (2) Uniformly mixing the glycidyl ether with the formula amount, the phase mixing agent with the formula amount, the rapid curing agent with the formula amount and the water with the formula amount at room temperature to obtain the internal catalytic rapid reaction water-based sand fixing agent.
  7. 7. The method for preparing an internal catalytic type rapid reaction water-based sand consolidation agent as claimed in claim 6, wherein the step (1) comprises the following steps in molar mass: (11) Placing 1 part of long-chain fatty acid, 1-1.1 parts of polyethylene polyamine and 10-15 parts of organic solvent into a reaction container, and uniformly mixing to obtain a mixed solution; (12) And regulating the temperature of the mixed solution to 180-200 ℃, carrying out reflux reaction for at least 4 hours to obtain a reaction solution, and carrying out post-treatment to obtain the quick curing agent.
  8. 8. The method of preparing an internal catalytic type rapid reaction water-based sand consolidation agent according to claim 7, wherein the polyethylene polyamine in the step (11) is one or more of diethylenetriamine, triethylenetetramine and tetraethylenepentamine, and/or The organic solvent in the step (11) is one or more of toluene and xylene, and/or The long-chain fatty acid in the step (11) is one or more of lauric acid, oleic acid and erucic acid.
  9. 9. The method of claim 7, wherein the post-treatment in step (12) is rotary evaporation or reduced pressure evaporation, filtration, and drying.
  10. 10. An internally catalyzed fast reacting water-based sand fixing agent, characterized in that it is prepared by the preparation method of any one of claims 6-9.
  11. 11. Use of the internal catalytic rapid reaction water-based sand consolidation agent according to any one of claims 1-5, claim 10 for rapid sand consolidation of sand control wells of loose sandstone reservoirs.
  12. 12. The use of claim 11, wherein the internal catalytic rapid reaction water-based sand-fixing agent is suitable for chemical sand control of vertical wells, side drilling wells and slim-hole wells of loose sandstone reservoirs, wherein the formation temperature is 50-80 ℃ and the sand-fixing time is 10-12 h.

Description

Internal catalytic type rapid reaction water-based sand fixing agent and preparation method and application thereof Technical Field The invention relates to the field of oil and gas field development, belongs to the technical field of chemical sand prevention, and in particular relates to an internal catalytic type rapid reaction water-based sand fixing agent, and a preparation method and application thereof. Background The chemical sand control has strong adaptability to complex well conditions, has obvious application advantages in small-bore wells, casing damage and casing change wells and sidetracking wells, but also has the defects of low success rate and short validity period. The uniformity of sand control agent injection significantly affects the useful life of chemical sand control measures. Reservoir heterogeneity and heterogeneous contact of multi-stage injection systems tend to form weak points of cementing, resulting in "one-point sand production, complete well failure". The conventional resin sand-fixing agent has the following defects that the sand-fixing agent, the displacement fluid or the catalyst are contacted and solidified unevenly due to the difference of viscosity and density among well entering liquids, the effective period of measures is greatly shortened, the second curing agent is generally volatile ethylenediamine, corrosive strong acid or easily-decomposed ammonium chloride and the like, the safety and environmental friendliness are poor, the curing time of the third conventional chemical sand-fixing system is 36-72h, the waiting time is long, and the operation cost is generally high. The water-based sand-fixing agent has low viscosity, easy pumping and high construction safety, and has become the main direction of the research and development of sand-fixing systems for chemical sand prevention in recent years. The Chinese patent No. 101538460B discloses a water-based resin sand-fixing agent, which comprises, by weight, 5-10 parts of a base material, 5-10 parts of a modified urea-formaldehyde resin, 1 part of an emulsifying agent per hundred parts of the base material, mixing and stirring the modified urea-formaldehyde resin, the organic pore-forming agent and the emulsifying agent according to parts by weight to prepare a mixture for standby, adding a reinforcing agent into the mixture according to a proportion before construction, and fully mixing the curing agent and the mixture to form a finished product. Chinese patent No. 110117347B discloses a water-based furan resin sand-fixing main agent, a preparation method thereof and a sand-fixing agent, wherein water-soluble furan resin is prepared through multi-step reaction of urea, formaldehyde, furfuryl alcohol and polyethylene oxide, and the water-based furan resin sand-fixing agent is prepared after the water-soluble furan resin is compounded with one or more compound acids of p-toluenesulfonic acid, benzenesulfonic acid, phosphoric acid and sulfuric acid. The technical scheme has the following defects that 1, the water-based sand-fixing agent needs to be compounded with the curing agent before use, the independent storage and operation cost of the curing agent are increased, 2, the curing agent component is used as an external catalyst for tail-end injection, uneven mixing of the main agent of the sand-fixing agent and the curing agent is easy to cause, the treatment efficiency is reduced, and 3, the safety risk of the strong acid curing agent in the storage and use process is high. The Chinese patent CN 109021951B discloses a sand-fixing agent which does not generate consolidation reaction, and is prepared from the following raw materials, by weight, 100 parts of epoxy resin, 10-15 parts of an emulsifying agent, 0.5-2.0 parts of nano particles, 200-400 parts of an acrylic monomer aqueous solution with the mass concentration of 3% -5%, and 5-10 parts of a curing agent. The curing agent is one or two selected from ethylenediamine and cyclohexanediamine. The resin for sand fixation is emulsified in the aqueous solution of the curing agent without adding the curing agent again. And mixing and heating the sand fixing agent and quartz sand for 72 hours to finish consolidation. The invention patent CN 108659805B discloses an emulsion type low-temperature sand-fixing agent, which comprises, by weight, 63-76% of a cementing agent, 22-35% of an oil phase, 0.9-1.5% of an emulsion stabilizer, 0.05-0.5% of a curing agent, and 0.1-0.3% of a coupling agent, wherein the cementing agent is a melamine formaldehyde resin solution with a mass concentration of 35-55%, the solvent is water, the oil phase is kerosene, the emulsion stabilizer is hydrophilic nano silicon dioxide particles, the hydrophilic nano silicon dioxide particles are nano silicon dioxide particles subjected to surface treatment by the coupling agent or nano silicon dioxide particles added with a particle dispersing agent, and the curing agent is ammonium chloride. In this inv