Seismic

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You can import both 3D and 2D seismic data, including very large multi-gigabyte datasets, which are supported by the application. You can then interpret the seismic data or use it to check an existing interpretation.

SEG-Y 2D/3D (*.segy, *.sgy)

The binary SEG-Y file format is the E&P industry-standard for seismic data. However, SEG-Y files can have many minor variations. For this reason, templates that you can customize and reuse to define the specific SEG-Y variation(s) that you work with are used.

The following default SEG-Y header format is applied when importing SEG-Y file, based on the SEG-Y rev 1 (May 2002) specification:

SEG-Y header

Field name (byte positions) Purpose
NumSamplesPerTrace (3221-3222) The number of samples per trace.
DataSampleFormat (3225-3226) The data format of the samples.

Trace headers

Field name (byte positions) Purpose
SequenceNumber (5-8) The primary line index.
FieldRecordNumber (9-12) The secondary line index.
(The primary indexing is used if present, otherwise it will switch to using the secondary)
CdpEnsembleNumber (21-24) The crossline index.
SourceCoordinateX (73-76) The easting of seismic traces.
SourceCoordinateY (77-80) The northing of seismic traces.
RecordingTimeDelay (109-110) The time (or depth) of the shallowest valid sample in the seismic data.
SampleInterval (117-118) The sample interval of the seismic data in microseconds (or millimeters).
The byte positions listed in the table reference the byte positions of fields within the headers.

The default format only supports source coordinates specified in length (see trace header field coordinate units 89-90). Both the crossline counter and inline counter must increase with fixed increments, and every trace must have the same number of samples, the same sample interval, and the same recording time delay.

JOA seismic files (.joaSeismic - internal XML / binary)

A proprietary XML/binary format comprised of two files per seismic volume: an XML file with the extension .joaseismic and a binary file with the extension .joaseismic.property. As with other JOA/JewelSuite file formats, no validation is required when importing data using the *.joaseismic format.

VoxelGrid (ASCII) (*.voxelgrid.ascii)

See VoxelGrid ASCII file format for details.