Experimental investigation of the effects of oil asphaltene content on CO_(2) foam stability in the presence of nanoparticles and sodium dodecyl sulfate  

作　　者：SADEGHI Hossein KHAZ'ALI Ali Reza MOHAMMADI Mohsen 

机构地区：[1]Department of Chemical Engineering,Isfahan University of Technology,Isfahan 84156-83111,Iran [2]Danish Offshore Technology Centre(DTU Offshore),Elektrovej 375,2800 Kgs.Lyngby,Denmark

出　　处：《Petroleum Exploration and Development》2024年第1期239-250,共12页石油勘探与开发（英文版）

摘　　要：Foam stability tests were performed using sodium dodecyl sulfate(SDS)surfactant and SiO2 nanoparticles as foaming system at different asphaltene concentrations,and the half-life of CO_(2) foam was measured.The mechanism of foam stability reduction in the presence of asphaltene was analyzed by scanning electron microscope(SEM),UV adsorption spectrophotometric concentration measurement and Zeta potential measurement.When the mass ratio of synthetic oil to foam-formation suspension was 1:9 and the asphaltene mass fraction increased from 0 to 15%,the half-life of SDS-stabilized foams decreased from 751 s to 239 s,and the half-life of SDS/silica-stabilized foams decreased from 912 s to 298 s.When the mass ratio of synthetic oil to foam-formation suspension was 2:8 and the asphaltene mass fraction increased from 0 to 15%,the half-life of SDS-stabilized foams decreased from 526 s to 171 s,and the half-life of SDS/silica-stabilized foams decreased from 660 s to 205 s.In addition,due to asphaltene-SDS/silica interaction in the aqueous phase,the absolute value of Zeta potential decreases,and the surface charges of particles reduce,leading to the reduction of repulsive forces between two interfaces of thin liquid film,which in turn,damages the foam stability.

关 键 词：CO_(2)foam foam stability ASPHALTENE silica nanoparticle sodium dodecyl sulfate(SDS) repulsive forces surface charges Zeta potential 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]