Reliable seismic imaging of gas accumulations in the shallow subsurface underneath the platforms in the Forties field are mitigating drilling risks and reducing drilling cost. We chose to use Ocean Bottom Seismometers for the ability to operate safely and efficiently in a busy oilfield. The resulting seismic image allows us to pay extra care during drilling of wells where gas is likely to be encountered. Conversely, we can avoid rigging the gasdiverter line when no gas is expected. The resulting operations are therefore optimized in terms of safety and costs.


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