Oil & Gas

Multiples, often viewed as noise in seismic data, can enhance shallow subsurface imaging when used strategically. In Exploring the Benefits and Pitfalls of Using Multiples in Imaging, Gordon Poole and Milad Farshad discuss how free-surface multiples can improve shallow illumination in challenging acquisition setups like wide-tow streamer and OBN designs. By re-injecting recorded data as secondary sources, their method addresses issues like heavy striping and limited near-offset recordings, reducing reliance on extensive site-specific surveys.

Seismic data from the south of the Sultanate of Oman presents unique challenges due to complex short-period surface and internal multiples generated in the upper section. This technical article introduces an innovative demultiple workflow designed to tackle these issues in the pre-migration pre-stack domain. The method combines least-squares multiple imaging with a one-way wave-equation multiple prediction, producing accurate multiple models while preserving key primary events. This approach enabled high-definition imaging of reflectors like the Ghadir Manqil and enhanced geological interpretation of the Haushi interval, supporting more precise tomographic velocity updates.