Impact of Pressure and Gas/Oil Ratios (GORs) on the Optimal Parameters for Surfactant Formulations in Chemical EOR: Experimental Study - Murad Hajiyev; Ahmed Farid Ibrahim; Mohammed B. Alotaibi; Mohanad Fahmi; Shirish Patil; Noof Al-Aqeel; Khaled Abdelgawad (ACS Omega)