--> Abstract: Deterministic Inversion Results in a Difficult Seismic Acquisition Environment: Example from a Carbonate Reservoir in United Arab Emirates, by Suaad Khoori, Yasser Kalifeh, Junaid Khan, Marc Vesseron, William Soroka, and Maria Ribeiro; #90077 (2008)
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Deterministic Previous HitInversionNext Hit Results in a Difficult Previous HitSeismicNext Hit Acquisition Environment: Example from a Carbonate Reservoir in United Arab Emirates

Suaad Khoori1*, Yasser Kalifeh2, Junaid Khan2, Marc Vesseron1, William Soroka1, and Maria Ribeiro1
1ADCO
2Fugro-Jason, UAE
*[email protected]

Transition zones between land and deep-marine environments are known to be difficult areas in which to acquire good quality Previous HitseismicNext Hit Previous HitdataNext Hit. The objective of this study was to apply Previous HitinversionNext Hit techniques to better image a carbonate reservoir located in a difficult transition zone. The use of various sources and receivers during Previous HitseismicNext Hit acquisition resulted in a challenging dataset for reservoir characterization studies. An integrated Previous HitseismicNext Hit Previous HitinversionNext Hit approach, combined with special processing, was successfully applied to improve the reliability of the reservoir characterization results in the problem transition zone. A prior Previous HitinversionNext Hit study revealed a Previous HitseismicNext Hit Previous HitdataNext Hit quality problem, which led the asset team to embark on an AVA (amplitude versus angle) study to improve the Previous HitseismicNext Hit image. A detailed evaluation of different angle-stack cubes showed that better quality subsurface images with higher signal-to-noise (S/N) ratio occurred over the near- to mid-angle range. The high S/N ratio angle-stack was found to be the key to obtaining more reliable Previous HitinversionNext Hit results for reservoir characterization. The integrated workflow used all available geological, petrophysical, producing and geophysical resources. The work emphasized obtaining detailed well ties to the Previous HitseismicNext Hit Previous HitdataNext Hit for stable wavelet estimates, an improved structural definition and realistic geologic constraints for a more reliable Previous HitinversionNext Hit. Industry-leading, constrained sparse-spike Previous HitinversionNext Hit was employed to invert the Previous HitseismicNext Hit for an acoustic impedance model. An acoustic impedance-to-porosity relationship from well control was used to produce a porosity model. Upon completion, a qualitative map was produced, which showed the mismatch between the Previous HitinversionNext Hit and the input Previous HitseismicTop. This map was used to identify low confidence problem areas, which had a high correlation to the bathymetry over the field.

 

AAPG Search and Discovery Article #90077©2008 GEO 2008 Middle East Conference and Exhibition, Manama, Bahrain