Course Details
As nice as it is looking at outcrops and interpreting their environments of deposition and relating those to sub-surface reservoirs, the best way to develop a thorough understanding of the processes that influence reservoir presence, distribution and quality is to look at modern systems. Having looked at seismic, well-logs and core data from OGDCL, POL, OMV, OPL MPCL and UEPL we conclude that the primary reservoir targets within the Lower Goru comprise of tidal channels, tidal inlets, creeks, shorefaces and barrier island sandstones.
The upper portion of the Lower Goru represents a transition from deltaic to estuarine conditions (sigmoid, top-truncated clinoforms in the lower part, sub-parallel, continuous, variable amplitude reflection configuration in the upper part). The reservoirs are only a snap-shot in this evolution from regressive to transgressive conditions.
The modern coastline of Karachi makes an excellent analog for a variety of reasons. Damming of the Indus in the 1950s has resulted in a decrease in discharge of 80% (Milliman et al., 1984). Away from the active channel effluent, the delta is undergoing transgression due to a decrease in sediment supply, subsidence, and a eustatic sea-level rise.
The three-day field trip will not only introduce participants to processes but will leave a lasting impression of the heterogeneity associated with such reservoirs.
Who Should Attend
• Geologists
• Geophysicists
• Petrophysicists
• Engineers
This course is meant for all who are working on the Sembar and Lower Goru or similar shallow marine clastic reservoirs.