Sequence stratigraphic analysis was
conducted employing Gamma Ray and Resistivity logs from five wells in the
eastern part of central swamp depobelt, Niger Delta. Interpretation by Kingdom
Suite software shows that lithologies are defined by Sequences I, II and III
comprising two marine transgressive shale markers and correspond to MFS.
Sequences I and III are incomplete comprising one SB while Sequence II is
complete. Types 1 and 2 sequence boundaries are contained within the sequences.
Key stratigraphic surfaces subdivide strata into LST, TST and HST. LST
consisting of SF and PC. Sequence I comprises LST and HST while sequence III
comprises SMST bounded by type 2 unconformity. The TST of sequence II comprises
a retrogradational set of parasequences while the HST of sequences I and II
comprise a progradational set of parasequences. The LST shows high reservoir
potential and may act as a stratigraphic trap for hydrocarbon because the
shales overlying the LSF act as a seal and within the SF complex. To assign ages
and depositional cycles to the identified surfaces, an integrated sequence
stratigraphic analysis should be conducted to accurately model the
lithostratigraphic and chronostratigraphic settings of the depositional
sequence of the study area.
Keywords: Maximum Flooding
Surface (MFS), Lowstand System Tract (LST), Transgressive System Tract (TST),
Highstand System Tract (HST), Slope Fan (SF), Prograding Complex (PC), Shelf
Margin System Tract (SMST), Lowstand Fan (LSF).