Horizon Tools - Take your pick!

Horizon Tools - Take your pick!

Insight’s horizon picking tools vary from manual straight line picking to the automatic waveform propagator. Choosing the right options depends on the data being interpreted and your preferences.

Picking Modes in Insight

Insight’s horizon picking tools offer varying levels of manual control. When picking a horizon, you may find that it’s beneficial to switch modes as the character of an event changes or the signal to noise level drops.

Straight line

This mode draws a straight line between picks. The level of horizon detail is based on the density of picks. This is a great choice when interpreting subtle, sparse events, or noisy data. Switch to the straight line picker when interpreting vintage 2d, volcanics or challenging areas around salt bodies.

Amplitude snapping

This mode snaps to the peak, trough, or zero-crossing of an event. The horizon automatically snaps to the nearest event type between picks.

Amplitude snapping is a fast way to consistently pick a strong event with only a few clicks. It’s not as advanced as the propagator guided methods, but sometimes simple is what you need.

Propagator guided

The propagator guided mode uses Insight’s propagator as an aid to manual picking. Using each manual click as a starting point, guided propagation analyses the local waveform and places picks based on trace-to-trace similarity. Fewer picks are required as your mouse “guides” the interpretation.

Simply click on an event, move the cursor along and watch as the new horizon picks follow the event.


The propagator automatically picks a horizon starting from a few seed picks. Place the seeds individually, or let Insight start from existing interpretation, such as 2D. Because the propagator evaluates the waveform, and not just local amplitudes, it easily tracks subtle events through noise.

By adjusting the settings, the propagator can be tuned to provide highly constrained, precise picks, or relaxed picking. The areal extent can also be controlled by limiting propagation to a specified area within a polygon, and by stopping propagation at faults.

For a detailed summary of Insight’s horizon propagator, see How It Works: Horizon Propagator.