Log ASCII standard
Log ASCII Standard (LAS) is a standard file format common in the oil and gas industry to store wellbore log information. Well logging is used to characterize subsurface stratigraphy in a wellbore.
A single LAS file can only contain data for one wellbore but it can contain any number of curves for that well. Common curves found in a LAS file might be gamma ray logging, sonic logging, or resistivity logging.
One of the restrictions of the LAS format is that all the data must be saved in the same sampling interval. This usually is not an issue with most log curves.
External links
- Canadian Well Logging Society: LAS files, accessed 24 January 2009.
- version 3 file format specification, accessed 21 March 2009.
- US Geological Survey: Log ASCII Standard (LAS) files for geophysical wireline well logs and their application to geologic cross sections through the central Appalachian basin, accessed 24 January 2009.