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→Applications
==Applications==
==Applications==
[[file:rate-of-penetration_fig2.png|thumb|{{figure number|2}}Example of correlating ROP with gamma ray curves.]]
Rate of penetration logs serve as historical records of drilling performance and can aid in optimizing drilling operation and formation evaluation.
Rate of penetration logs serve as historical records of drilling performance and can aid in optimizing drilling operation and formation evaluation.
Hard, compacted formations drill slow and consistent. Soft formations drill fast and have erratic ROP.
Hard, compacted formations drill slow and consistent. Soft formations drill fast and have erratic ROP.
===Mud weight (Pore Pressure)===
===Mud weight (Pore Pressure)===