1887

Abstract

Summary

Production monitoring with time-lapse seismic has been a key practice in the oil and gas industry, aiding in extending field life, identifying bypassed reserves, and preventing water breakthrough. Advances in seismic acquisition and processing now enable more detailed monitoring, even in geologically complex reservoirs.

For a deep-water gas field in the Romanian Black Sea, currently under development, maintaining a high production plateau is key to economic viability. Seismic interpretation indicates reservoir compartmentalization, making it crucial to identify untapped zones. Time-lapse seismic enables timely detection of these compartments, guiding infill drilling to sustain production. A detailed assessment of the field-specific expected time-lapse signal signature and magnitude, the associated noise levels and the optimum seismic acquisition configuration to evaluate the signal acquisition over the noise is required.

Using a calibrated rock physics and simulation-to-seismic modelling, the feasibility of future 4D seismic monitoring was assessed and monitor surveys designed considering conventional image-domain reflectivity techniques and advanced data domain methods using time-lapse full waveform inversion (4D FWI). The study characterized pressure depletion and saturation change signals. It was determined the pressure depletion signal is likely below the noise floor for conventional imaging, but with 4D FWI offering an alternative time-lapse seismic data processing strategy.

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/content/papers/10.3997/2214-4609.2026648006
2026-01-27
2026-02-19

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/content/papers/10.3997/2214-4609.2026648006
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Value of Simulation-to-Seismic Modelling for Seismic Monitor Design and Derisking
Conference Proceedings 2026, 1 (2026); https://doi.org/10.3997/2214-4609.2026648006
/content/papers/10.3997/2214-4609.2026648006
/content/papers/10.3997/2214-4609.2026648006
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