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<< Click to Display Table of Contents >> Navigation: Interpretation > Import Well Data |
Note: This module is deprecated and is retained for backward compatibility only. For current workflows, use the Well data exchange or Well Data Show modules instead.
Import Well Data reads a plain-text file containing well marker picks (depth or time picks tied to surface X, Y coordinates) and displays them as overlay points on a seismic gather. Each well pick is matched to the nearest seismic trace in the input gather whose bin location falls within a user-specified search radius, allowing geophysicists to visually tie well control points to their corresponding seismic positions.
The input text file must follow a fixed column format: each row contains a well name, three ignored numeric values, a two-way time value (in milliseconds), and the X and Y surface coordinates of the well location. The module converts the time from milliseconds to seconds internally. Well picks that fall farther than the Maximum Distance threshold from any seismic trace bin center are excluded from the display.
Use this module when you need to overlay well-to-seismic tie picks on a gather view to validate velocity analysis or check structural correlation. The seismic gather must have binning information applied before this module can match well locations to trace positions.
The input seismic gather against which well picks will be positioned. This gather must have geometry and binning information assigned so that each trace has a known bin center coordinate (X, Y). The module searches through all traces in this gather to find which trace bin is closest to each well pick location. If the gather has not had binning applied, the matching process cannot function correctly.
The path to the plain-text (.txt) file containing the well pick data. The file must be formatted with one pick per row using whitespace-delimited columns in the following fixed order: well name, three ignored numeric columns, two-way time (in milliseconds), X coordinate, Y coordinate. Rows that do not conform to this layout will produce incorrect results. Ensure the coordinate system of the well X, Y values matches the coordinate system used in the seismic geometry.
Maximum Distance — the search radius (in metres) used to match each well pick to the nearest seismic trace bin center. Default value is 50 m. Only well picks whose closest trace bin lies within this distance are included in the overlay display; picks farther away are silently discarded. Set this value to roughly half the seismic bin spacing to ensure each well pick is matched to the correct trace. Increase it if well picks are known to lie slightly off-bin (for example, due to coordinate system differences), but be cautious about setting it too large, as this may cause picks to snap to incorrect traces.