Structural to stratigraphic framework of “Banghan” field, onshore Niger Delta, southern Nigeria

Abstract

Banghan field shows growth fault structures with dips ranging from 32° to 71° at the top and it decreases towards the base of the fault. The syn-depositional growth fault throw is 10 m to 91 m. The synthetic growth faults trend NW-SE while antithetic and other subsidiary faults trend NE-SW. Fault assisted closures correspond to the crest of rollover structures that are possible trapping mechanism for hydrocarbon. The lithologic units are Burdigalian to Tortonian in age. The lithofacies include bioturbated heteroliths, shale’s, and laminated sandstones. The field had undergone at least six cycles of deposition. The sequence of deposition and various chrono surfaces identified using well logs, biofacies, seismic and core data shows that the sediments deposited obey Walther’s law.

Keywords

• structural map
• biofacies
• horizon
• fault
• sequence
• heteroliths
• stratigraphy
• well logs
• lithofacies
• system tract