Petroleum System Modeling of the Western Canada Sedimentary Basin - Isopach Grid Files

A 3-D geologic/petroleum system model of the Western Canada Sedimentary Basin
(WCSB) was created by using elevations on the top of the Lower Cretaceous
Mannville Group as a reference horizon for stacking 18 isopach intervals from
the base of the Devonian Woodbend Group and age equivalent formations,
stratigraphically upward to the ground surface; this includes an estimated
thickness of eroded sediments based on 1-D burial history reconstructions for
33 wells across the study area. Each interval for the construction of the 3-D
model was chosen on the petroleum system basis of whether it is primarily
composed of reservoir, hydrocarbon source, seal, overburden, or underburden
strata, as well as the quality and areal distribution of well and other data.
Data from numerous databases and data sets were accessed to create the isopach
intervals. Interval boundaries are primarily formation tops that were derived
from data retrieved from the databases. Because formation names commonly
change across province and national boundaries, formations that comprise the
intervals were chosen based on age-equivalent strata. These isopach files were
gridded at approximately 1-kilometer spacing and saved for publication as
zmap-format grid files.

[Summary provided by the U.S. Geological Survey.]