HYDROCARBON POTENTIAL STUDY OF THE ABAM WELL, Y- FIELD, OFFSHORE COTE D’ IVOIRE, WEST AFRICA.

EARTHSCIENCES

Petroleum studies of the study area using Construction of synthetic seismogram to tie seismic to well helped to locate the top reservoir horizon. Velocity analysis and use of ‘V0-k’ depth conversion approach with probabilistic consideration helped to convert time to depth with base case structural crest at -6700fl TVDss. The approach generated three possible cases of GRV’s that were incorporated with Petrophysical parameters to generate the volume of hydrocarbon in place. The GIP probabilistic ranges from the result are: low case (14.4 bcf), base case (22.6 bcf) and high case of 36.3 bcf. STOIIP base case calculation estimated a total volume of 3.40 mmstb. Petrophysical analysis estimated an average porosity of 21% in the discovery well with OWC at -6821 and GOC at -6813ff TVDss. Oil stain in core is from 6785-6801.6ft TVDss. The pressure-depth plot over the well show anomalous data points that probably related to supercharged’ formation. Reliability of the pressure data to infer fluid contact presented high level of uncertainty. Core information from the well identified the reservoir lithology to be medium to coarse grained arkosic sandstone interbedded with shale and siltstone. Core permeability is estimated at a geometric mean value of 3.1mD with carbonate cement affecting the reservoir quality in the water leg.

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