Wettability alteration is one of the most important methods for oil recovery from sandstone and carbonate reservoirs. The effects of salinity, pH, temperature, and chemicals such as surfactants and fatty acids on the alteration of the wettability were described in previous studies. In recent years, attention has been directed to nanoparticles as a wettability alteration agent. The effect of som...

resulting in decreased energy consumption and increased Experiments were performed to study bitumen film rupture and bitumen recovery, is the impetus for undertaking a systemdisplacement on model surfaces. Bitumen film on a glass plate atic study of the mechanisms involved in oil–water displacewas found to thin down and rupture in the presence of water ment on a solid surface. Such mechanistic ...

This paper explores the use of acoustics for the recovery of oil in oil-water emulsions. A series of experimental studies were conducted using acoustic standing waves in resonant cavities as means of trapping oil droplets and enhancing oil separation. Several cavity configurations were explored and the frequency range used was between 1 MHz-2 MHz. Oil-water emulsions studied were made using min...

STUDY OBJECTIVE To investigate whether residents in the vicinity of the Sea Empress tanker spill suffered an increase in self reported physical and psychological symptoms, which might be attributable to exposure to crude oil. DESIGN Retrospective cohort study; postal questionnaire including demographic details, a symptom checklist, beliefs about health effects of oil and the Hospital Anxiety ...

This paper (SPE 134140) was accepted for presentation at the SPE Annual Technical Conference and Exhibition, Florence, Italy, 19–22 September 2010, and revised for publication. Original manuscript received 1 June 2010. Revised manuscript received 20 October 2010. Paper peer approved 8 November 2010. Summary The second-largest oil spillage in Norwegian petroleum history occurred on 12 December 2...

This study used an exogenous lipopeptide-producing Bacillus subtilis to strengthen the indigenous microbial enhanced oil recovery (IMEOR) process in a water-flooded reservoir in the laboratory. The microbial processes and driving mechanisms were investigated in terms of the changes in oil properties and the interplay between the exogenous B. subtilis and indigenous microbial populations. The ex...