| dc.description.abstract | The Chevron et al. Hibernia P-15 well penetrated one of many bright spots
and encountered gas. Bright spots are one of four 'direct hydrocarbon indicators' and
result from the high acoustic impedance contrast from gas accumulations in Tertiary
sediments. Many of these bright spots occur at or near the same stratigraphic level in
the South Mara Unit, which is bounded by two main unconformity reflections: the
Base Tertiary Unconformity and another regionally extensive unnamed one overlying
the South Mara Unit. Paleo-environmental interpretation using seismic and well log
data suggests that the P -15 well penetrated a near shore sand body that was preserved
during a transgression. The transgression was marked by localized erosion so many
other sand units are not preserved. Other bright spots in the South Mara may be the
result of tuning effects and may or may not contain any dissolved gas.
Key Words: Bright spots, Direct Hydrocarbon Indicators, Shallow Gas, Jeanne
d'Arc Basin | en_US |
