Abstract
The dispersed particle gel (DPG) three-phase foam is a novel profile control and flooding system. The stability mechanism of the DPG three-phase foam was studied using an interfacial dilational rheology method. The results show that the elastic modulus of the DPG three-phase foam is up to 14 mN/m, which is much higher than the traditional foam. The increase in interface elasticity produces significantly positive effects on foam stability. Emphasis is given to the influences of frequency, temperature, pressure, and concentration on the viscoelasticity and interfacial adsorption of DPG particles, which change the modules of the foam interface and have a significant effect on foam stability. In addition, the microstructure of the DPG three-phase foam was observed. A viscoelastic shell is formed by the aggregation of the DPG particles on the interface. The irreversible adsorption gives the interface high elasticity and mechanical strength. The electrostatic repulsion between particles increases the spacing between bubbles. The combined effects of these factors give the interface higher mechanical strength, slow down the film drainage, effectively prevent gas permeation, and significantly improve the foam stability.
Highlights
Nowadays, the foam system has attracted a lot of attention, and it has found an increasingly wide utilization in various fields, such as petroleum engineering, food engineering, and for the synthesis of new materials [1,2,3,4,5,6,7,8,9]
Foam stability is mainly determined by the properties of the liquid film, so most early research infancy, and the stability mechanism is still controversial
The results show that the dispersed particle gel (DPG) three-phase foam has better mechanical strength, and the interface has results show that the DPG three-phase foam has better mechanical strength, and the interface has better resistance to deformation
Summary
The foam system has attracted a lot of attention, and it has found an increasingly wide utilization in various fields, such as petroleum engineering, food engineering, and for the synthesis of new materials [1,2,3,4,5,6,7,8,9]. Polymer gels, and nanoparticles are added into foams to enhance foam stability They do this by increasing foam viscosity or particle adsorption in order to inhibit gas diffusion and retard the rate of liquid drainage [3,4,5,6]. Foam stability is mainly determined by the properties of the liquid film, so most early research surfactant types and the expansion of its application fields, the study of the dynamic properties of was based on the measurement of the equilibrium interfacial tension [10,11]. It is found that there is a numerical relationship between the interfacial viscoelasticity and the thickness to study the interface properties of surfactant solutions, nanoparticle-foam, the surfactant-polymer of the liquid film [14,15]. DPG on interfacial behavior was discussed, which provided the theoretical basis for the mechanism of viscoelastic solid particles
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