A composite log suite that comprised of
gamma ray, resistivity, density and neutron logs of six
wells (Agate, Diamond, Apatite, Calcite, Copper and
Jasper) were employed to evaluate the petrophysical
properties of the reservoirs of interest in XY field Golf of
Mexico. This was done to evaluate the trend and values
of the petrophysical properties of the reservoirs in the
field, while the objective was to delineate and predict the
reservoir system quality and performance.
Correlation was carried out across the 6 wells using
gamma ray, resistivity, neutron and density logs. The
distribution and occurrence of these lithostratigraphic
units appeared to reflect the influence of basin
morphology and sea level variation. Tops and bases of 6
reservoirs of interest were mapped. Shale Volumes (Vsh)
were computed using gamma ray log; the reservoir
versus non-reservoir was delineated by applying cut-off
of 80% computed volume of shale with the guide of
spontaneous potential (SP) and deep resistivity logs for
wells Agate and Diamond.
Computed Vsh was used for effective porosity to
discount for the effects of clay bound water. The average
Keywords : Basin Morphology, Gulf of Mexico, Permeability, Porosity, Reservoir Sand, Shale Volume, Water Saturation, Well Logs.