Pore-scale Observation Of Surfactant Flooding
For Weekly Water-wet Porous Media: The Effect
Of Gas Injection To Improve Oil Recovery
Author(s)
T. Suekane & R. Tezuka
Abstract
Surfactant flooding is one of the effective methods to produce trapped oil after
water flooding. Surfactant is injected into reservoirs to reduce the interfacial
tension between the trapped oil and water. However, at the pore scale, the
mechanism of how the injected surfactant reaches the interface through the
stagnant water adjacent to the interface has not been completely explained yet.
This research provides new insights into the transport phenomena of multiphase
flow in porous media using two-dimensional micro-model curved on a quartz
glass plate. When the surfactant is injected after water flooding, stagnant water
which extends a few pores from the interface, hampers the arrival of the
surfactant. It is found that gas injection before the surfactant flooding increases
the oil recovery with reducing amount of injected surfactant. Injected gas flows
through the water and there is no direct effect on oil production. However,
during the successive surfactant flooding, the gas bubbles are trapped in porous
media which changes the flow of surfactant to reach the interface of the trapped
oil.
Keywords: surfactant flooding, enhanced oil recovery, porous plate, gas
injection, oil trapping
Keywords
Keywords: surfactant flooding, enhanced oil recovery, porous plate, gas
injection, oil trapping
Related Book
Other papers in this volume
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