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7th Middle East Geosciences Conference and Exhibition
Manama, Bahrain
March 27-29, 2006
Seismic
for the 21st Century: A Case Study in the Use of Very
High Channel Recording Systems
1 Joint Operations Exploration
Department, Joint Operations, Wafra, Wafra, Kuwait, phone: +965-3983639, [email protected]
2 Reservoir Services, WesternGeco, P.O.Box 9261, Dubai, United Arab Emirates
3
Land
Acquisition
, WesternGeco, P.O. Box 1106 (Salmiya), Kuwait
4 Joint Operations, Wafra, Wafra, Kuwait
Very high channel count
seismic
recording systems open new avenues in the search and exploitation of hydrocarbons in
the Middle East. Vast leaps in hardware and software development since the 1980's allow manufacture of electronics
capable of recording over 20 000 channels in an cost efficient manner. In addition, these advances in technology have
allowed the use of higher fidelity processing algorithms and techniques such as pre-stack time migration in routine
processing which previously were only possible in theory or in research using the largest computers available at that time.
However, the general philosophy used to record
seismic
data
is still based on the 2D paradigms of the 1980's where
recording systems were able to record 96 to 480 channels for each shot. Even the highly successful 3D
seismic
technique,
is still based on the paradigms developed for 2D recording and limited channel counts.
As the demands for the information provided by
seismic
data
have increased from providing a structural picture to detailed
reservoir information in the inter-well space, fold of the 3D
seismic
surveys has increased to very high levels to try and
deliver the hi-fidelity
seismic
data
sets required for such analysis. Especially in the Middle East, where strong coherent
surface generated noise is prevalent, a plateau has been reached to how much information the
seismic
data
can provide.
This case study shows how changing the paradigms used for 3D
seismic
acquisition
and processing, made possible by very
high channel count systems, can extend the usefulness of 3D surface
seismic
acquisition
further than with conventional
acquisition
and processing techniques.