The Influence Of Ion Diffusion On Dispersion Of Phenolic Resin In Porous Media

There are certain salt compounds existing in the reservoir rock,while the reservoir rock is classified as porous medium which has the characteristics of permeability.When injected into the reservoir,the phenolic resin in the profile begin to assemble due to the concentration of the salt ions.In this case,the salt ions in the rock cause the aggregation of phenolic resin.In this process,the temperature and porosity of the rock,the mineralization of the environment and the concentration of phenolic resin will all affect the phenolic resin aggregation and plugging effect.In this thesis,the influence of these factors on ion diffusion and phenolic resin aggregation is firstly explored,and then provides a theoretical basis for the formulation of the phenolic resin in the profile by comparing the data under static and dynamic conditions.In this experiment,a mold with a cellulose microporous membrane as the medium was designed to simulate the formation environment,and a water-soluble thermoplastic sulfonated methylation phenolic resin was added to the solution to measure the variation of the conductivity of the solution and the particle size of the particles.This experiment sets two sets of comparative tests: First,exploring the aggregation characteristics of the phenolic resin dispersion system in the stable salt solution system,and measuring the influence of these factors on the aggregation behavior of the phenolic resin by measuring the hydrodynamic diameter of the dispersion system under different factors.Second,to explore the diffusion law of ions when the cellulose microporous membrane is used as a medium,and to examine the influence of different factors on the ion diffusion behavior by measuring the conductivity of the salt solution.To explore the influence of different factors on the dispersion of phenolic resin in ion diffusion environment,change the temperature,concentration of salt solution,pore size of microporous membrane and concentration of phenolic resin and monitor the particle size of phenolic resin to explore these factors on phenolic resin aggregation behavior Impact.The main research results are as follows:(1)The diffusion characteristics of the salt solution in the microporous membrane are affected by salt concentration,temperature,and pore size of the microporous membrane.The diffusion rate of ions(dψ/dt)is positively correlated with salt concentration,temperature,and pore size of the microporous membrane.The diffusion parameter K of the ion is positively correlated with the temperature and the pore size of the pore filter membrane but not affected by the salt concentration.(2)The aggregated particle size and aggregation rate of the phenolic resin are closely related to temperature,salt concentration,and resin concentration.Among them,there is a positive correlation between the hydrodynamic diameter of the phenolic resin aggregate particles,temperature and salt concentration.The hydrodynamic diameter of the phenolic resin aggregate particles is proportional to the phenolic resin concentration.The phenolic resin aggregation rate is positively correlated with temperature,salt concentration and phenolic resin concentration.(3)In experiments where phenolic resins aggregate in a diffusion system,the relationship between the diffusion rate(dψ/dt)and the diffusion parameter K to the environmental variables is the same as the blank test,but the value is lower than that in blank test.It shows that the phenolic resin particles can seal the microporous membrane;The relationship between particle size and aggregation rate of phenolic resin aggregates and environmental variables is the same as that of the stabilization system but the value is lower than that in the stability system.