Interpretation of Shuaiba Channels and Implications for Modelling and Field Development, Al Shaheen Field, Qatar

H. Cromie¹, M. Furstnow¹, L. Ramos¹, A. Uldall¹, L. Bruce¹, M. Docherty¹, and M. Emang²

Abstract

Seismic interpretation integrated with long horizontal well data reveals large and complex channel systems incised into the top of the Shuaiba reservoir across the Al Shaheen Field, Block5, offshore Qatar. The area is characterised by a major east-west and north-south channel system, with many minor subsidiaries. Recent reprocessing of the Al Shaheen 3D seismic data and advanced interpretation and visualisation workflows have improved the understanding of channel distribution and complexity. The workflows include spectral decomposition, timeslice movies and attribute analysis. The largest channel system is up to 8 km in width. Smaller channels, which are within the productive area of the Shuaiba reservoir, range from 150 to 1500m in width. The channel sinuosity varies greatly from almost linear to highly meandering. Vertical and horizontal well data show that the channel infill is a combination of clay and/or sandstone. A well-established series of tectonic lineaments, present across the field; are thought to have had a minor influence on channel distribution and geometry.

AAPG Search and Discovery Article #90188 ©GEO-2014, 11th Middle East Geosciences Conference and Exhibition, 10-12 March 2014, Manama, Bahrain