BHP SU Map-View Trace Structure

Map-view data in BHP_SU is cross-section data that has been transposed and sorted. The transpose operation swaps the least-significant header key with the vertical dimension, and the sort operation promotes the vertical key to the primary sort key. For example, if seismic data has been written in ep,cdp order, and bhptranspose is run, the resultant dataset is in tracl,ep,cdp order.

The header key tracl is used to refer to the vertical key in a BHPIO dataset.

Seismic Data

Seismic data is stored as time or depth slices, with tracl as the primary key.

Trace Headers:

Sampling Interval (dt) is the previous least-significant key interval.

Number of Samples (ns) is the previous number of least-significant key values.

Horizon Data

Horizon data is stored as horizon or event slices.

Trace Headers:

Sampling Interval (dt) is the previous least-significant key interval.

Number of Samples (ns) is the previous number of least-significant key values.

Model Data

Model data is stored as property slices for each defined depth or time in the model.

Trace Headers:

Sampling Interval (dt) is always 1.

Number of Samples (ns) is the previous number of least-significant key values.

Start Time (delrt) is the starting values of the previous least-significant key.