The present paper reviews work done on the adsorption of ethoxylated sulfonates during the Norwegian state-supported program on IOR, termed SPOR.The objective of the project is to obtain fundamental understanding of the mechanisms involved concerning the loss of surfactants by chemical flooding of sandstone reservoirs in The North Sea. Special emphasis is made concerning the effects of clay minerals in reservoir cores.The first part deals shortly with ethoxylated surfactants in general, chemical analysis, chemical stability, and temperature and salt tolerance. Both static adsorption onto model core material and nonequilibrium dynamic adsorption in reservoir cores, chromatographic effects, and possible sacrificial agents are handled in greater detail.

You can access this article if you purchase or spend a download.