Injecting water in one well causing oil not recovered by primary production to migrate to an adjacent well. Wells Development Well -- A well drilled to a known producing formation in a previously discovered field. Exploratory Well - Any well drilled for the purpose of securing geological or geophysical information to be used in the exploration or development of oil, gas, geothermal, or other mineral resources, except coal and uranium, and includes what is commonly referred to in the industry as "slim hole tests," "core hole test," or "seismic holes".

A method of increasing oil recoveries from an existing reservoir. Water is injected through a special “water injection well” into an oil producing formation to force additional oil out of the reservoir rock and into nearby oil wells.

A flood of water; an inundation.