Biography Zis G. Katelis
A Senior Geophysicist with a career spanning 19 years working on seismic processing,
interpretation projects and workflows, log data integration as well as contributing to and
leading integrated technical studies. Since July 2007 with Gaffney, Cline & Associates
in Singapore, responsible for geophysical technical input on Exploration and
Development projects and reserves assessments in the Asia Pacific, Central Asia and
the Middle East regions.
Naturally fractured basement reservoirs have been created by a series of complex
processes and their evaluation is inherently complicated. As with all static and dynamic
modeling, it requires careful integration of multiple data types. This is further highlighted
with these complicated reservoirs. Major considerations include the different tectonic
phases that created the reservoirs and control their present day performance,
geological process such as exfoliation, as well as the overall petroleum system.
STOIIP determination still remains difficult even when much well data and performance
history is available. It is often difficult to determine if a field has a high recovery from a
small STOIIP, or a low recovery from a high STOIIP.
This presentation covers the data analysis required in the modeling process to evaluate
the reserves reported for fractured basement reservoirs..