The Office of Geological Survey has converted 57,073 paper wire-line log files to a digital format.  These geophysical logs are one of the tools commonly used in the interpretation of subsurface information in the exploration for oil and gas and, more recently, carbon sequestration activities.  The resulting digital files are called RasterLogs (digital Raster files of the geophysical Logs).  The digital files are in an ‘industry standard' TIF format.

To see what is included, download the current  RasterLogs Index spreadsheet .  An explanation of the information found in the Microsoft Excel spreadsheet is available as well.

Updates will be available via FTP.  For more information about accessing the DEQ FTP site, or to add your name to the email update notification list, please contact  Steve Wilson .  For more about FTP go to the "FTP Made Easier " page at  http://www.michigan.gov/deq/0,1607,7-135-3311_4111_4231-184531--,00.html

Even though this is one of the most complete sets of these records forMichigan , we know it is not complete.  For a variety of reasons some records were not available for conversion.  If you have any records that will add to this collection and are willing to share them, the OGS will scan the files and return the source documents and the associated digital files.

In a collection of this size and complexity there are inadvertent errors and omissions.  Please report problems or discrepancies you encounter.  Your help is appreciated.  Your feedback will help improve the quality of the collection.

To get a set of RasterLogs send an external USB 2.0 hard disk with at least 80 GB of available space and the requisite cables.  When it is received a set of RasterLogs will be copied onto the hard drive and return it.  Please send an email so you can be included on the RasterLogs email update notification list.

Return shipping (UPS / FedEx / DHL etc) is the responsibility of the party sending the disk drive.  If return shipping is not provided, the unit is sent by US Mail.

The USB hard disk drive should be sent to:

     Steven E. Wilson 
     Office of Geological Survey
     525 West Allegan
     Lansing MI  48909

There's more  The Office of Geological Survey has Digital Permit Well Files for permits 1 to 42,999 (those that were on microfilm).  Please see the PWF page at http://www.michigan.gov/deq/0,1607,7-135-3311_4111_4231-188504--,00.html for details.

If you have questions, comments, or suggestions please email Steve Wilson .  

Out-of-print Michigan Geological Survey publications are available on-line at
  www.michigan.gov/deqgeologyinmichigan  
    (that is deq geology in michigan - all lowercase - no spaces).

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