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RFWI Technology Applied in Perdido AreaNormal access

Authors: B. Wray and N. Chazalnoel
Event name: First EAGE Workshop on Deepwater Exploration in Mexico: Foster collaboration to unlock potential
Session: Overcoming Subsurface Challenges Part II
Publication date: 15 May 2018
DOI: 10.3997/2214-4609.201800620
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 2.19Mb )
Price: € 20

Full waveform inversion (FWI) has become the preferred method for updating shallow sediment velocities. However, due to limited diving-wave penetration depth of WAZ acquisition and the geologic complexity of the region, updating subsalt velocities in the Gulf of Mexico remains challenging. Through a scheme incorporating reflection data, we extend the reach of FWI beyond diving-wave penetration depth. We present examples from the Mexican waters of the Perdido fold belt where reflection FWI successfully updates velocities at depths out of reach of diving wave-based FWI and in geologically complex situations where tomography typically struggles, including intrasalt and subsalt velocity update examples.

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