The article “Tuning is not necessarily bad—Channel sand delineation from seismic data of the Upper Gharif in Oman” is written by Fuping Zhu et al., with all authors from Petroleum Development of Oman (PDO). Until recently, the channels of the Upper Gharif were considered too thin (only a tenth of a wavelength) for seismic detection, and instead were explored using costly grid drilling. In this article, the authors report on the successful use of seismic data for reservoir characterization and well placement, following careful interpretation of seismic amplitudes in terms of tuning and prior constraints on the sand thicknesses (absence of thick sands, small NTG ratio). The proposed methodology has been developed on Field Z and has successfully predicted the sand thickness encountered in a new well. It is expected that this methodology will be applicable to several Upper Gharif reservoirs which hold a significant portion of PDO's reserve and resource volumes.
Following Zhu's article is a workshop report. In the article “The big rush to the Middle East unconventional reservoirs,” Mohammed Badri of Schlumberger and Saleh Al-Saleh of Saudi Aramco share news of the successful SEG workshop highlighting seismic applications in exploiting unconventional reservoirs.