Field evaluation of surfactant flooding. Technical and economical consideration

摘要

Surfactant flooding has for several years been recognised as an Improved Oil Recovery (IOR) method with a significant potential with respect to increased oil recovery. Full field simulations have been conducted on two North Sea sandstone reservoirs, which both are candidates for large scale surfactant flooding. This paper discusses the economical and technical conditions necessary for successful surfactant flooding in these reservoirs. The economical evaluations take into consideration cost of chemicals, oil price, operational costs and interest rate. The cumulative discounted net cash flow is used to quantify the economy. The parameters related to the surfactant system efficiency are interfacial tension, surfactant adsorption and critical capillary number. Simulations are carried out by means of the ECLIPSE black oil simulation model with the surfactant option. 12 refs., 10 figs., 8 tabs.