Electro-sequence analysis and natural resources potential of a transitional environment in central swamp depobelt, Niger delta, Nigeria

Abstract Sequence stratigraphy and Electrosequence of the Don-Field Central Swamp depobelt Niger Delta Basin, was carried out using well logs, biostratigraphic core data. The aim this study is to re-characterise revalidate reservoirs within area provide an optimum framework for predicting reservoir character, development quality distribution. Detailed petrophysical evaluation reveals proficient hydrocarbon units with variable parameters (i.e. porosity, permeability shale volume) that can accommodate productive reserve. Core data analyses revealed heavy minerals like pyrites glauconites be economic interest. gamma wireline signatures wells show are predominantly blocky in shape indicative fluvial channels. Fluvial channels typically associated coastal and/or marginal marine environments. More so, aforementioned observations were validated palaeoenvironmental interpretation strata penetrated by Well-1, Well-2, Well-3 via sidewall analyses. stratigraphic surfaces such as maximum flooding (MFS) sequence boundary (SB) observed good correlation palynological foraminiferal zones. stacking patterns progradation, retrogradation aggradation) encountered gave acumen into systems tracts lowstand system tract (LST), transgress?ve (TST) highstand (HST) interpretation. These constitute a depositional set middle—late Miocene age bounded chronologically MFS 9.5 Ma, 12.8 15.0 15.9 Ma SB 12.1 13.1 15.5 Ma. delineated based on Shell Petroleum Development Company (SPDC) biozonation scheme: F-zone P-zone P820-P680 F9500-F9600/F9700 contained biofacies interpreted index fossils (Globorotalia foshi S.I; Globorotalia praefohsi; peripheroacuta; Orbulina spp; Praeorbulina sicana; Paragloborotalia mayeri; Neogloboquadrina acostaensis) which corresponded alphanumeric code N8–N16 planktonic zones Blow.