Part of Petroleum Industry related to maintaining

production of hydrocarbons from subsurface deposits up to the wellheads
injection fluids (water, gas, chemicals) from wellheads down to subsurface reservoirs
subsurface metering

The major challenge is to mitigate the numerous Subsurface Production Complications, which is facilitated by three major operational areas:

Well & Reservoir Management	Reservoir Study & Modelling	Well & Reservoir Surveillance

See Also