The Ability Of Different Algebraic Dendrimers To Establish Residual Drag Coefficients

With the fast development of polymer flooding technology,the polymer flooding in our country oilfields has moved towards to high tempreture,hypersalinity,heavy oil reservoir.As viscosity loss of common polymer in this enviromental extremes is very serious.Therefore rely on solution viscosity to establish the mobility control ability still has a big issue.Author's research group from the view of raise ability of establish residual resistance factor in the long-term study of enhanced ability of mobility control.Proposed an important way that use dendritic structure to raise polymers' ability of mobilty control.The molecular configuration and synthesis mechanism of dendritic structure has become gradual perfection under research group's unremitting study.Based on the research group's study of the dendritic polymer in early stage.This artical adopted 1,3-propanediamine as the core of dendrimers,used the reaction of Micheal addition and amidation,make it reacted with methyl acrylate,synthesized the denrimers products MA1.0/MA2.0/MA3.0.Then used the maleic anhydride to modified its terminal amido.Added double bond structure in different dendrimers to raise its molecular activity.Then mixed acrylic acid,acrymide,salt-resistant monomer AMPS in pure water to initiation water solution copolymerrization.And obtained G1.0/G2.0/G3.0 products.Its structure was confirmed compliance with the design principles after characterized its structure by FTIR and 1HNMR.This article study the change of ability of establish residual resistance factor in different solution concentration,permeability,injection vilocity and some other different external conditions.The study found that ability of establish residual resistance factor are positive correlated with the generations of dendritic polymers.In addition,this artical also research the adsorption capacity of different generations dendritic polymers in porus medium.The results showed that the adsorption capacity and the adsorption capacity are directly related.The reason has been given to preliminary explain why different generations dendritic polymers residual resistance factor appears significant difference.To throw further light on the main reason why different generations dendritic polymers has distinct adsorption capacity.This artical researched the main way that how the different generations dendritic polymers establish adsorption capacity.The results showed that along with the dendritic polymers generations increase,the main way of establish adsorption capacity gradually from surface absorption to mechenical trapping.And bigger the proportion of mechenical trapping,the higher capacity of establish adsorption.At last,this artical study the micromechanism change between the stoste and the produced fluid of different generations dendritic polymers.Thoroughly explained why different generations dendritic polymers would take different way to establish adsorption and why the proportion of mechenical trapping are positive correlated with the capacity of establish adsorption from the microcosmic perspective.This artical also proposed should be increase the hydrodynamic size and the intensity of molecular structure under the condition of injectivity.Therefore improve the probability of mechenical trapping in high-permeability porus medium,and enhance the adsorption capacity and the ability of establish residual resistance factor.