Print this pageAbstract: 
Seismic
Inverstion
Using Sonic and Density Log Guided Spectrally Enhanced Seismic Data
MUKHOPADHYAY, H.N., RAO HEBBARE
Optimally processed
seismic data is close approximation of reflection coefficient series of
the sedimentary sequences of an area and after appropriate inversion leads
to synthetic sonic sections. However, a serious disadvantage in traditional
seismic data is its limited vertical resolution due to presence of unrecognizable
high frequencies.
Resolution enhancement of seismic
data in time and spatial domains is important. Existing seismic (2ms S.I.)
methods are restricted within effective band-width, 5-60 Hz only. As a
result seismic data has limited vertical resolution capability to delineate
thin beds or reservoirs.
A technique is proposed for
spectral enhancement of seismic data having a bandwidth of 5-60 HZ to 5-250
Hz using sonic and density logs in wells on or close to the seismic section
based on regression and analysis of variance and optimal Filters. Synthetic
sonic section is generated by seismic inversion. The technique was applied
on seismic data of Bombay offshore area and the results were validated.
This new approach in enhancing
vertical resolution of seismic data
would assist in reservoir characterization
down to log level and thus would help in effective reservoir performance
monitoring and modification of injection profiles where heterogeneity and
very thin bed alternations pose major problems.
AAPG Search and Discovery Article #90942©1997 AAPG International Conference and Exhibition, Vienna, Austria