Mechanism And Experimental Study On Improving Foam Stability By Carbon Materials

Nanoparticles as a foam stabilizer can effectively improve the stability of the foam.There are few studies on improving the foam stability for sheet materials having a thickness of nanometer diameter and micron-sized particles.Therefore,this experiment studies the mechanism and application of the effects of different types of carbon materials on foam stability.In this paper,the layered graphene oxide material was prepared by Hummers method.The synergistic stability and mechanism of graphene oxide and surfactant on nitrogen foam were studied by static evaluation and analysis.Then,the graphene nanosheets were prepared by liquid phase stripping method.The synergistic stability and mechanism of graphene nanosheets and surfactants on nitrogen foam were studied by static evaluation and analysis.Finally,ultrafine graphite particles with a particle size of about 2 ?m,a stabilizer,a dispersant and a surfactant compound foam system were screened out.The effect of plugging and profile control in the formation was studied by manually filling the core to stabilize the foam of ultrafine graphite particles.The two-dimensional visualization device was used to study the profile control effect of ultra-fine graphite particle stabilized foam system on high permeability formation after multiple rounds of steam stimulation.The results show that graphene oxide can effectively improve the stability of cetyltrimethylammonium bromide(CTAB)foam.With the increase of CTAB addition,the dispersion state of graphene oxide and its adsorption state at the gas-liquid interface will change.There is an optimal ratio of CTAB to graphene oxide,and the synergistic stabilization effect is the strongest.Graphite has different stripping effects in different types of surfactants.Graphene nanosheets can also effectively improve the stability of cetyltrimethylammonium bromide(CTAB)foam,and its mechanism and law are similar to those of graphene oxide.Ultrafine graphite particles and stabilizers,dispersant compound system can greatly extend the half-life of GD-1 foam.The profile control plugging effect of the ultrafine graphite particle composite foam relative to the pure GD-1 foam is significantly improved.