At Azeri-Chirag-Gunashli (ACG), seismic activities have focused on static and dynamic imaging of the reservoir to reduce risk for appraisal and development drilling. Imaging and reservoir characterization constrain the “static” reservoir model, and 4D reservoir monitoring constrains the “dynamic” reservoir model. Over the last several years we have successfully tested and implemented prestack depth migration, 4-C OBS acquisition and processing, and towed-streamer 4D in various parts of ACG. Results from these technologies are being used to shape the longer-term (20+ years) seismic strategy of the development—in particular, how 4D seismic surveillance should be implemented across ACG.

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