International visitor dining experiences: A conceptual framework

Abstract

In the course of chemical flooding of crude oil reservoirs with surfactants,
\nretention of surfactant particles in the pores of the reservoir rock can cause a major reduction
\nof the reservoir permeability. This can cause serious problems thus unfavourably influencing
\nthe economics of oil recovery. An appropriate assessment of the reduction in permeability is
\nessential for the recovery of hydrocarbons. During tertiary recovery of crude oil, a critical
\nevaluation of formation damage is necessary to evade operating costs, as the reservoir rock is
\nextremely sensitive to chemicals injected. The extent to which permeability is reduced cannot
\nbe comprehensive for core field scales; it is consequently paramount to study the reduction in
\nthe permeability of a core at laboratory scale before field scale estimation. In this paper, an
\nexperimental investigation on the reduction in permeability after surfactant injection cores is
\npresented. Surfactants were used to flood the core samples. The permeability of the cores was
\ncalculated at the beginning and end of every flood by measuring the differential pressure
\nduring surfactant flooding of the cores. From the results, it is evident that there is a strong
\ninfluence of surfactants on the process of adsorption on reservoir rocks and consequently
\nleading to reduction in permeability.