Changes

[[file:enhanced-oil-recovery_fig3.png|thumb|{{figure number|3}}Schematic diagram of steam flooding. In this method, heat reduces the viscosity of oil and increases its mobility. © U.S. Department of Energy, Bartlesville, Oklahoma.]]

[[file:enhanced-oil-recovery_fig3.png|thumb|{{figure number|3}}Schematic diagram of steam flooding. In this method, heat reduces the viscosity of oil and increases its mobility. © U.S. Department of Energy, Bartlesville, Oklahoma.]]

[[file:enhanced-oil-recovery_fig4.png|thumb|{{figure number|4}}Schematic diagram of ''in situ'' combustion. The mobility of oil is increased by reduced viscosity caused by heat and solution of combustion gases. Copyright: U.S. Department of Energy, Bartlesville, Oklahoma.]]

[[file:enhanced-oil-recovery_fig4.png|thumb|{{figure number|4}}Schematic diagram of ''in situ'' combustion. The mobility of oil is increased by reduced viscosity caused by heat and solution of combustion gases. © U.S. Department of Energy, Bartlesville, Oklahoma.]]

In a thermal flood, much effort is devoted to treating the boiler water and the stack gases resulting from the burning of produced oil or gas to generate heat. Because of environmental considerations, this usually limits the technique to unpopulated areas.

In a thermal flood, much effort is devoted to treating the boiler water and the stack gases resulting from the burning of produced oil or gas to generate heat. Because of environmental considerations, this usually limits the technique to unpopulated areas.