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Exploring basins with shallow mobilized salt is challenging due to poor seismic imaging around and beneath salt bodies. Complex salt structures reduce the seismic signal-to-noise ratio, making it difficult to model subsurface velocities and generate accurate images. Shallow salt also presents operational risks for offshore drilling, such as well control issues, drill string entrapment, mechanical obstructions, and salt karst formation caused by salt dissolution from drilling fluids.
The Controlled Electromagnetic Source Method (CSEM) is valuable for identifying areas with hydrocarbon potential and mapping geological risks. It is especially effective in detecting features like gas chimneys, salt bodies, and free gas or hydrate zones.
This study had two main objectives: to identify shallow geohazards that could pose risks to offshore operations and to improve imaging of deeper geological reservoirs. By combining CSEM and seismic data through joint interpretation, the research aimed to enhance subsurface understanding and support safer, more efficient exploration.