Logging while drilling

Simple vertical profile of a horizontal well, illustrating basic terms.

Sensors integrated into the drilling assembly that transmit data while drilling other than guidance data (measurement while drilling (MWD)) is considered LWD. Data can include standard measurements of the formation (electric logs such as gamma ray, resistivity, or porosity), drilling parameters (e.g., downhole torque, weight on bit, temperature, or pressure), or geophysical information (look-ahead seismic profiles). Data can be transmitted to the surface or stored for later retrieval.

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See also

• Bend
• Build rate
• Extended-reach wells
• Geosteering
• Heel
• Kickoff point
• Lateral
• Horizontal well
• Measurement while drilling
• Multilevel well
• Multilateral well
• Sidetrack
• Toe
• Total measured length

External links

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