Abstract: A crude oil displacement method includes partially filling a vessel with treatment fluid and positioning an oil-saturated sample within the treatment fluid. The method also includes adding a solvent system to the vessel above the treatment fluid. In addition, the method includes moving oil from the oil-saturated sample into the solvent system. The method also includes measuring one or more of R, G, B, L, a, b, L, C, H, H, S, B, reflectance, transmittance and wavelength of the displaced oil using a color device. In addition, the method includes determining the amount of displaced oil using the one or more of R, G, B, L, a, b, L, C, H, H, S, B, reflectance, transmittance and wavelength of the displaced oil.

Abstract: A modified treatment fluid includes a first surfactant, wherein the first surfactant is nonionic, cationic, anionic, zwitterionic, or a combination thereof and a hydrocarbon altering additive (HA), that includes an organic salt, an inorganic salt, urea, a urea derivative, a carbamate, ammonia, an amine, a glycol, a glycol ether, an amide, an aldehyde, or a combination thereof. The modified treatment fluid further includes a treatment fluid.

Abstract: A modified treatment fluid includes a first surfactant, wherein the first surfactant is nonionic, cationic, anionic, zwitterionic, or a combination thereof and a wettability altering additive (WEA) that includes an organic salt, an inorganic salt, urea, a urea derivative, a carbamate, ammonia, an amine, a glycol, a glycol ether, an amide, an aldehyde, or a combination thereof. The modified treatment fluid further includes a treatment fluid.