What is formation water?

Some articles on formation, formations, formation water:

Spontaneous Potential - Physics
... The origin of SP across formation can be attributed to two processes involving the movement of ions Streaming potential (Ek) Electrochemical potential (Ec) Streaming potential ... potential appears when mud filtrate is forced into the formation under the differential pressure between mud column and formation ... is produced when the flow takes place across mud-cake in front of permeable formations, across permeable formations being invaded, and across shale beds ...
Formation Evaluation Tools - Lithology Logs - SP and Gamma Ray
... A salinity difference between the drilling mud and the formation water acts as a natural battery and will cause several voltage effects ... This "battery" causes a movement of charged ions between the hole and the formation water where there is enough permeability in the rock ... The most important voltage is set up as a permeable formation permits ion movement, reducing the voltage between the formation water and the mud ...

Famous quotes containing the words water and/or formation:

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