Isometrix works on a revolutionary streamer design that combines measurements of the seismic pressure wavefield and particle acceleration – in three X,Y and Z components. It’s the only streamer system that can measure the vertical streamer shape between the streamer fin positions thanks to the unique ability of micro-electromechanical system (MEMS) accelerometers to record to 0Hz -- the earth’s gravity field.

Deghosting with the multicomponent data allows for a deeper tow, enriching low frequencies and increasing the weather window to work in. Once deghosted by combining the pressure and acceleration signal the data can be redatumed to any streamer depth to match your baseline or last repeat for the best 4D matching. On top of this, the unique single sensor design allows for any legacy analogue array response to be imprinted on the data, further increasing the match while providing for a new, uncompromised baseline.

WHY IT WORKS SO WELL

The Isometrix is a multi-component system made up of pressure and motion sensors. The hydrophones are spaced in pairs every 3.125m (recorded individually), which allows the swell-induced noise to be recorded accurately and unaliased.

The motion noise in the dynamic environment of a towed streamer requires much finer spacing, so we site sensors every 0.625m. In a typical 12 x 8km streamer spread, with P, X, Y and Z more than 500,000 measurements are recorded – an incredible feat of engineering.​

But, even more than that, while recording, each measurement is analyzed and QC’d in real-time before moving on to the next step of swell or streamer motion signal-safe noise removal. We know how each and every one of those 500,000 sensors are performing -unlike the traditional analogue arrays where sensors can be weak or malfunction or be noisy but is hidden by the array-averaged response.