Dept. of the Interior
U.S. Geological Survey
Energy Resources Team

Selected Data from Eleven Wildcat Wells in 
the National Petroleum Reserve in Alaska

USGS Open File Report 99-015


Depths to Selected Stratigraphic Horizons

WELL NAME        ROCK UNIT                                                     DEPTH, FEET
NORTH INIGOK 1   Surficial Deposits and/or Gubik Formation                     30.00                 
NORTH INIGOK 1   Sandstone of the Colville Group and Sagavanirktok Formation   100.00                
NORTH INIGOK 1   Shale of the Colville Group                                   885.00                
NORTH INIGOK 1   Nanushuk Group                                                1920.00               
NORTH INIGOK 1   Torok Formation                                               3265.00               
NORTH INIGOK 1   Pebble Shale Unit                                             7385.00               
NORTH INIGOK 1   Kingak Shale                                                  7650.00               
NORTH INIGOK 1   Sag River Sandstone                                           10050.00              
NORTH INIGOK 1   Shublik Formation                                             10090.00              

Data Source
Table 15.3. - Total depth and depths to selected stratigraphic horizons
for Government-drilled wells on the North Slope of Alaska., 
in:

Gryc, George, Ed., 1988, Geology and exploration of the National Petroleum
     Reserve in Alaska, 1974 to 1982, U.S. Geological Survey Professional 
     Paper 1399, Pgs. 322 - 324.