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Line 202: + + − − [[file:quick-look-lithology-from-logs_fig2.png|thumb|{{figure number|2}}Characteristic log signatures for a carbonate and evaporite sequence. Hole conditions are good.]]
Quick-look lithology from logs (view source)
Revision as of 17:23, 16 January 2014
, 17:23, 16 January 2014→Formation density logs (Alone)
==Formation density logs (Alone)==
==Formation density logs (Alone)==
[[file:quick-look-lithology-from-logs_fig2.png|thumb|{{figure number|2}}Characteristic log signatures for a carbonate and evaporite sequence. Hole conditions are good.]]
===Property measured===
===Property measured===
Measured density is the sum of the rock system density and the pore fluid system density. Density values can therefore be used directly to identify lithology only when the porosity is insignificant. In porous rocks, density must be interpreted in combination with neutron or other porosity logs.
Measured density is the sum of the rock system density and the pore fluid system density. Density values can therefore be used directly to identify lithology only when the porosity is insignificant. In porous rocks, density must be interpreted in combination with neutron or other porosity logs.