National Petroleum Reserve (NPR) Alaska Seismic Reflection Data; USGS

The National Petroleum Reserve in Alaska (NPRA) is located in the primitive
wilderness of Alaska's North Slope. The U.S. Geological Survey (USGS) began
some geological surveying in this area in the early 1900's, and the U.S. Navy
began geological and geophysical surveys and drilling in 1945 to appraise the
petroleum potential of the Reserve. Information on surveys prior to 1955 may
be obtained from the Branch of Alaskan Geology at:
Alaska Technical Data Unit
Mail Stop 48
U.S. Geological Survey
345 Middlefield Road
Menlo Park, CA 94025.

SEISMIC DATA:
Common Depth Point (CDP) seismic reflection data and documentation covering
about 13,000 miles for 1972-81 are available from USGS. Full-scale (5 in./sec)
sections are available for most of the lines, which were shot at either 6-,
12-, or 24-fold multiplicity. Data sets include index maps, shot-point location
maps, seismic sections and velocity analyses.

MAJOR DATA SETS:
CDP seismic reflection data
Reprocessed seismic sections
Seismic reflection field tapes
Processed field tapes
Miscellaneous Geophysical data tapes
Barrow data
Stacking velocities

Anciliary Data for the Seismic Data:

TIME, VELOCITY, DEPTH DATA
This file contains time, velocity and depth (TVD) information for up to 25
identified seismic horizons. Position information includes line number, shot-
point number, latitude and longitude for most of 1972-1981. These data were
generated by Petroleum Information for 1981. The data are preliminary and are
from Terra Tech (contractor).

SHOT-POINT LOCATION DATA
This file contains position information for shot locations during 1972-1981.
The file was created by National Geophysical Data Center (NGDC) from TVD data
and other shot-point tapes.

ELEVATION DATA
Elevation data for the National Petroleum Reserve in Alaska includes elevation,
northing and easting information for 1972-1979. This file was created by Tetra
Tech (contractor for USGS) and contains position information, including line
number, shot point, latitude and longitude.