Changes

==Applications==

==Applications==

Measurement while drilling technology has become an important tool for reservoir evaluation in the past 10 years. Gamma ray, resistivity, and porosity logs obtained during drilling are commonly being used to supplement or replace wireline logs for formation evaluation and geological correlation in high risk or high cost operations.

Measurement while drilling technology has become an important tool for reservoir evaluation in the past 10 years. [[Basic open hole tools#Gammy ray|Gamma ray]], resistivity, and porosity logs obtained during drilling are commonly being used to supplement or replace wireline logs for formation evaluation and geological correlation in high risk or high cost operations.

===Formation evaluation===

===Formation evaluation===