Recovering hydrocarbons from tar sand or heavy oil reservoirs

Recovery composition and method

Recovery method for high viscosity petroleum

Recovery of heavy oil by steam flooding combined with a nitrogen

Recovery of petroleum from viscous petroleum-containing formatio

Scale inhibition during oil production

Secondary oil recovery method

Secondary recovery procedure

Sequential injection foam process for enhanced oil recovery

Solvent enhanced fracture-assisted steamflood process

Solvent flooding to recover viscous oils

Solvent push-pull process for improving vertical conformance of

Steam flood oil recovery process

Steam stimulation process for recovering heavy oil

Steam-foam drive

Steamflood recovery method for an oil-bearing reservoir in a dip

Steamflooding in multi layered reservoirs

Stimulation of gas wells with phosphate ester surfactants

Stimulation of oil and gas wells with phosphate ester surfactant

Surfactant composition and method for cleaning wellbore and oil