TEXTUTAL INTERPRETATION OF THE OGWASHI-ASABA FORMATION IN IBUSA NIGER DELTA, ASABA
Abstract
The study focuses on the textural interpretation of the Ogwashi-Asaba Formation in Ibusa, Niger Delta, with the aim of understanding its textural properties, depositional environments, and tectonic setting. Using a combination of sieve and petrographic analyses, the research examined key parameters such as grain size, sorting, skewness, kurtosis, and mineral composition. The results reveal that the formation predominantly consists of medium to fine sands with moderate sorting, suggesting a fluvial-deltaic depositional environment. The presence of high quartz content (92–93%) and accessory minerals like feldspar and tourmaline indicates sediment maturity and derivation from igneous and metamorphic terrains. Variability in energy conditions, evidenced by poorly sorted samples in certain outcrops, reflects episodic high-energy depositional events likely driven by fluvial influx or storms. The findings underscore the significance of the Ogwashi-Asaba Formation as a hydrocarbon reservoir and provide critical insights into the Niger Delta Basin's sedimentological and tectonic evolution. This study contributes to the broader understanding of the formation’s geological history, its potential for hydrocarbon exploration, and its role in basin analysis.
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