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Line 55: − + − − [[file:rate-of-penetration_fig2.png|thumb|{{figure number|2}}Example of correlating ROP with gamma ray curves.]]
→Applications
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.
[[file:rate-of-penetration_fig2.png|thumb|{{figure number|2}}Example of correlating ROP with gamma ray curves.]]
===Mud weight (Pore Pressure)===
===Mud weight (Pore Pressure)===
===Correlation===
===Correlation===
The ROP log is the first source of data that can be used to correlate to nearby wells. This is done by comparing ROP to gamma ray or SP curves (Figure 2). This correlation can help determine structural and stratigraphic position and is used to predict when the well will reach a zone of interest.
The ROP log is the first source of data that can be used to correlate to nearby wells. This is done by comparing ROP to gamma ray or SP curves ([[:file:rate-of-penetration_fig2.png|Figure 2]]). This correlation can help determine structural and stratigraphic position and is used to predict when the well will reach a zone of interest.
===Lithology===
===Lithology===