Seismic

/app/seismic

Upload SEG-Y volumes and horizon exports, run SpeQ-AVO on a partial-stack group, and view any converted volume as sections or as a 3D cube. The uploaded volumes and the horizons imported against them are what a SpeQ-AVO or Inversion-AVO run works over, and a finished SpeQ-AVO run appears here as a further volume to view alongside its input.

Upload

Pick the volumes and horizon files to upload and say how each volume is organised.

The Upload section of the app — Upload

Field	Purpose	Range	Default
Stack full partial	Whether the volume is a full stack or one member of a partial-stack group. A partial stack needs a group name and a label per file.	—	Partial stacks
Group name	Name of the partial-stack group the volumes belong to. Volumes uploaded under the same group can be inverted together.	1 to 80 characters	—
SEG-Y volumes	The SEG-Y files to upload. Each file is converted to a browsable volume once the upload completes.	—	—
Horizon files	Horizon exports to upload alongside the volumes. They can be imported onto a volume's grid after it has been converted.	—	—
Stack label	This file's label within its partial-stack group, such as near, mid or far, or an angle range. Labels must be unique within the group.	up to 40 characters lowercase letters and digits, with single hyphens between words	near
Vertical axis domain Time (ms) Depth (m) Unknown	Whether the vertical axis of this file is time or depth. Leave it unknown to let the converter read the domain from the file.	—	Unknown

Limits are the API's unless marked app. The app may offer a narrower range.

Partial-stack group run

Run SpeQ-AVO on the converted members of a partial-stack group, windowed around a horizon.

Field	Purpose	Range	Default
stack labels	Which stacks of the group take part in the run. Unticking a stack leaves it out of the merged result.	up to 40 characters, at least 1 value lowercase letters and digits, with single hyphens between words	—
horizon id	The horizon the run is windowed around. Only samples within the margin of this surface are inverted.	at least 1 character	—
margin ms	Half-window either side of the horizon that the run covers. A wider margin includes more of the trace above and below the surface.	1 to 2000 ms	—

Limits are the API's unless marked app. The app may offer a narrower range.

Viewer

Choose which volume the viewer reads.

Field	Purpose	Range	Default
slice-stack	Which stack of a group SpeQ-AVO result to display. Shown only when the store holds more than one stack.	up to 40 characters lowercase letters and digits, with single hyphens between words	—
array amplitude coeff_positive coeff_negative coeff_zero	Which sparse-spike coefficient volume of a SpeQ-AVO result to display: positive, negative or zero coefficients.	—	—

Limits are the API's unless marked app. The app may offer a narrower range.

Sections

Step through the volume one inline or crossline at a time.

The Sections section of the app — Sections

Field	Purpose	Range	Default
Slice dimension Inline Crossline horizontal horizon	Whether the section is cut along an inline or a crossline.	—	Inline
Inline 1720 (1/269)	Position of the section along the chosen axis. Release the slider to load that section.	0 to 268app digits only	0

Limits are the API's unless marked app. The app may offer a narrower range.

3D volume

Three planes through the volume, with an optional horizon surface, drawn as a cube.

The 3D volume section of the app — 3D volume

Field	Purpose	Range	Default
inline 1720 …	Position of the inline plane through the cube. Release the slider to load that plane.	0 to 268app digits only	0
crossline 898 …	Position of the crossline plane through the cube. Release the slider to load that plane.	0 to 560app digits only	0
time 1000	Position of the horizontal plane through the cube, by sample along the vertical axis. Release the slider to load that plane.	0 to 1000app digits only	500
Show inline crossline time	Shows or hides one of the three planes. Hiding a plane reveals what sits behind it.	—	inline, crossline, time
show-horizon	Shows or hides the selected horizon surface. Hiding it exposes the reflectors it is meant to be checked against.	—	—
show-inset	Shows or hides the inset plotting the amplitude distribution along the horizon.	—	—
Vertical exaggeration	Stretches or squashes the vertical axis of the cube relative to the bin spacing. Higher values make gentle structure easier to see.	-2 to 2app	-1

Limits are the API's unless marked app. The app may offer a narrower range.

Display

Gain, clipping and overlay controls for the section image.

The Display section of the app — Display

Field	Purpose	Range	Default
Gain None tpow (t^p) AGC Per-trace norm (pbal) Scale Bias	How trace amplitudes are balanced before display: none, a time-power gain, automatic gain control, per-trace normalisation, a fixed scale or a bias.	—	None
p	Exponent of the time-power gain. Higher values boost late arrivals more strongly.	0 to 5app	2
win	Length of the automatic gain control window in seconds. Shorter windows equalise amplitudes more aggressively.	0.01 to 2 sapp	0.5 s
Gain	Factor every amplitude is multiplied by before display.	—	2
Gain	Constant added to every amplitude before display, shifting the image towards positive or negative.	—	0
Max Amplitude	Amplitude at which the colour scale saturates. Lower values bring out weak reflectors; higher values preserve the strongest events.	—	—
Clip	Percentile of the amplitude distribution used to set the clip. Lower percentiles clip more of the strongest samples.	90 to 100 %app	99 %
coefficient-reveal	Drag the handle across the section to reveal the SpeQ-AVO coefficient overlay on top of the amplitude image.	—	—

Limits are the API's unless marked app. The app may offer a narrower range.

Horizon import

Turn an uploaded horizon export into a horizon on this volume's grid.

Field	Purpose	Range	Default
source path	The uploaded horizon export to import.	at least 1 character a horizon file uploaded on the Upload tab	—
name	Display name of the horizon. It is seeded from the file name and can be edited.	1 to 100 characters	—

Limits are the API's unless marked app. The app may offer a narrower range.