Oil recovery after water flood, by surfactant-polymer flooding at different percentages of clay content, has been studied for
July oil field. Formation water (72000 ppm) and crude oil of the July field have been used; the study was performed on
Mesh to represent the porous field. Bentonite, colloidal sand packs media of clay from Wyoming Company, dispersion into
USA, has been used as sand-packs. Dowell EZEFLO and polyacrylamide were used. This study concentrates on clay surfactant,
F-75, this study effect of sur-in the various percentages of clay content (0%, 3.5%, 5%, tertiary oil 10%, 15% and 20%) on
recovery. The effect of secondary and of surfactant concentration on tertiary oil recovery at the mentioned clay content values
has been also studied to determine the maximum ultimate oil recovery for each case. The experimental results show that,
the major factor affecting tertiary oil recovery by surfactant-polymer method is the surfactant concentration; the recovery
is improved as the concentration increased; for any clay content, as the surfactant concentration increases the oil production
starts sooner (earlier breakthrough) and sustains at higher level; for clay content less than 10 % it is more efficient to use a large
pore volume of surfactant slug with low concentration; for oil value of clay content more than 15%, the recovery increases with
increasing surfactant concentration up to the value of 4% and after that, the recovery decreases. Thus this value (4%) is taken
as the optimum value of surfactant concentration in this case and for any slug concentration, as the clay content increases, the
oil breakthrough is delayed.
Atef Abdullah Abdelhady is an Academic Staff in Petroleum department in British University in Egypt. He was an Operations Manager in BP/Gupco Company. He holds a Bachelor’s and Master’s degree in Enhanced Oil Recovery by Chemical Water Flooding. He holds a PhD degree in the specialty of Petroleum Production Engineering. He has 24 years of field operation experience for all activities associated with processing of oil and gas onshore and offshore locations. He is an SPE active member for more than 27 years. During his career, he has authored several technical papers in Egypt and USA. He has been selected as a qualified candidate for inclusion in the 1998 edition of International Who’s Who Membership. He has training skills and experience inside and outside Egypt.