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pyVDS

Convenience wrapper around Bluware's OpenVDS+ Python bindings which enables reading of VDS files with a syntax familiar to users of segyio.

Installation

Requires openvds package from Bluware.

N.B. This is licensed under CC-BY-ND 4.0

• Wheels from PyPI: pip install pyvds
• Source from Github: git clone https://github.com/equinor/pyvds.git

Usage

Use segyio-like interface to read VDS files

import pyvds
with pyvds.open("in.vds")) as vdsfile:
    il_slice = vdsfile.iline[vdsfile.ilines[LINE_IDX]]
    xl_slice = vdsfile.xline[LINE_NUMBER]
    zslice = vdsfile.depth_slice[SLICE_IDX]
    trace = vdsfile.trace[TRACE_IDX]
    trace_header = vdsfile.header[TRACE_IDX]
    text_file_header = vdsfile.text[0]

Read a VDS file with underlying functions

from pyvds.accessors import VdsReader
with VdsReader("in.vds") as reader:
    inline_slice = reader.read_inline_number(LINE_NUMBER)
    crossline_slice = reader.read_crossline(LINE_IDX)
    z_slice = reader.read_zslice_coord(SLICE_COORD)
    sub_vol = reader.read_subvolume(min_il=min_il, max_il=max_il,
                                    min_xl=min_xl, max_xl=max_xl,
                                    min_z=min_z, max_z=max_z)

Creating VDS files

Example of creating wavelet compressed VDS file from SEG-Y:

.\SEGYImport.exe --vdsfile <output_file> --compression-method wavelet --tolerance 1 <input_file>

SEGYImport may be obtained from Bluware's OpenVDSPlus distribution