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Abstract: Previous HitSeismicNext Hit Inverstion Using Sonic and Density Log Guided Spectrally Enhanced Previous HitSeismicNext Hit Data

MUKHOPADHYAY, H.N., RAO HEBBARE

Optimally processed Previous HitseismicNext Hit 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 Previous HitseismicNext Hit data is its limited Previous HitverticalNext Hit resolution due to presence of unrecognizable high frequencies.

Resolution enhancement of Previous HitseismicNext Hit data in time and spatial domains is important. Existing Previous HitseismicNext Hit (2ms S.I.) methods are restricted within effective band-width, 5-60 Hz only. As a result Previous HitseismicNext Hit data has limited Previous HitverticalNext Hit resolution capability to delineate thin beds or reservoirs.

A technique is proposed for spectral enhancement of Previous HitseismicNext Hit data having a bandwidth of 5-60 HZ to 5-250 Hz using sonic and density logs in wells on or close to the Previous HitseismicNext Hit section based on regression and analysis of variance and optimal Filters. Synthetic sonic section is generated by Previous HitseismicNext Hit inversion. The technique was applied on Previous HitseismicNext Hit data of Bombay offshore area and the results were validated.

This new approach in enhancing Previous HitverticalNext Hit resolution of Previous HitseismicTop 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