... in a waterflood. In a pattern flood, theapplication of heat to parts of the pattern that normally are bypassed byinjected fluids usually will improve the mobility ratio at the displacementfront, since the viscosities of most crude oils are more temperature-sensitivethan the viscosity of water. The improvement...

..., but merely that the reservoir fluids are compressed to the point where a significant oil bank is formed. This isolated pilot pattern flood, where all offset wells are producing, gives some indication of what might be expected under both pattern and line-drive flooding. The pilot has progressed to a point...