Seismic imaging of vertical array data acquired using smart DAS uphole acquisition system

Bakulin, Andrey (Geophysics Technology, EXPEC Advanced Research Center, Saudi Aramco) | Golikov, Pavel (Geophysics Technology, EXPEC Advanced Research Center, Saudi Aramco) | Erickson, Kevin (Geophysics Technology, EXPEC Advanced Research Center, Saudi Aramco) | Silvestrov, Ilya (Geophysics Technology, EXPEC Advanced Research Center, Saudi Aramco) | Kim, Young Seo (Geophysics Technology, EXPEC Advanced Research Center, Saudi Aramco) | Smith, Robert (Geophysics Technology, EXPEC Advanced Research Center, Saudi Aramco) | Al-Ali, Mustafa (Geophysics Technology, EXPEC Advanced Research Center, Saudi Aramco)

OnePetro 

A novel acquisition scheme using distributed acoustic sensing (DAS) technology, which enables simultaneous near-surface characterization and deep reflection imaging, is proposed. At the heart of the system are the smart DAS upholes, a series of shallow wells instrumented by a continuous fiber-optic cable. Accurate long-wavelength statics captured from direct uphole measurements reduce interpretation uncertainty, while much of the surface wave noise that contaminates conventional surface acquisition is avoided when recording using buried vertical arrays. Here the first field tests conducted in Saudi Arabia are presented, focusing on the imaging results produced from data acquired from the vertical portions of the fiber. Both time and depth seismic images show excellent results despite large well spacing. Comparison of DAS data with legacy seismic revealed good agreement between them. The smart DAS uphole system is a paradigm shift in seismic acquisition that can overcome some of the major challenges caused by complex near surface conditions, resulting in improved data quality and reduction in exploration risk.

Presentation Date: Wednesday, October 17, 2018

Start Time: 8:30:00 AM

Location: 204C (Anaheim Convention Center)

Presentation Type: Oral