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Geoscience Conference & Exhibition
Innovative Geoscience Solutions – Meeting Hydrocarbon Demand in Changing Times
March 7-10, 2010 – Manama, Bahrain
Challenges in Conditioning Seismic Data for AVO Offshore Saudi Arabia
(1) GDPD, Saudi Aramco, Dhahran, Saudi Arabia.
(2) GDPD, SAUDI ARAMCO, DHAHRAN, Saudi Arabia.
Unless sufficient S/N ratios can be achieved for both target and reference events, an AVO analysis is likely to prove fruitless, multiples and mode-conversion interference is most insidious when unrecognized and multiples with the same velocity as the primary and mode conversions (P-SV) interfere with our primary signals, drastically distort the amplitude behavior versus offset. As shown in the figure below the large distortions in the signal are caused by crossing multiples and conversions at specific offset ranges with the gathers. A major challenge in the seismic data processing industry is the attenuation of such multiples and noise that contaminate the signal which lead to inaccurate AVO analysis. The proper separation and removal of both multiple and other coherent noise energy from the seismic data can be a very challenging task in the AVO data conditioning. Adding to the challenges in picking the target on the pre stack migrated gathers, is the variable stratigraphic nature of the target and the associated sand stringers.
Here, we present a comprehensive workflow that can identify and remove unwanted multiples and various noise energies using fully in house built programs and leading intelligent filter technology (LIFT).
Currently I am the Team Leader for special project team in Geophysical data processing division, I joined Saudi ARAMCO in 2001, Before joining ARAMCO I was working for PGS for a period of 13 years, I occupied many positions within Petroleum Geo-services in USA starting from Onboard SR geophysicist to Processing Supervisor in Abu Dhabi, I also helped in establishing the processing center for Petroleum Geo-services in Abu Dhabi in 1999. I am active member in SEG, and a member ofEAGE. I also served as DGS Public Relation in 2007-2008, DGS, currently holding the professional development chairperson position in Dhahran Geoscience Society.