Rock Property Analysis for Visualization of Upper Gharif Fluvial System Using Spectral Decomposition, Sultanate of Oman

please note: MOG approval is still pending. The early Permian Gharif Formation is a major producing oil and gas reservoir in the Sultanate of Oman. The Upper Gharif subdivision is known for its continental fluvial depositional environment. Seismic tools were commonly used for imaging the reservoir distribution. However, seismic resolution can be an obstacle for resolving complex reservoir distribution. Rock property extraction using well data helped to better understand the behaviour of the reservoir using synthetic forward modelling. Spectral decomposition along with sculpting proved an efficient technique for imaging the Gharif reservoirs. The amplitudes change with frequency due to the tuning between the top and base of the geo-bodies (Castagna et al., 2003). The detected geo-bodies were then integrated with well results and outcrop data for verification. In this paper we will represent how the rock property analysis helped to guide the visualization endeavours to detect the sand reservoirs. Besides, how the generation of discrete frequency volumes using spectral decomposition helped to reveal the distribution of the sand fluvial channels. Two fields in North and Central Oman will be taken to illustrate this paper.