Well log images are scanned or digitised raster pictures of paper well logs. g-Space imports these rasters and attaches them to a well over a measured-depth interval so that the image can be displayed alongside digital curves. Supported image formats are .png, .jpg, .jpeg, .bmp and .xpm. This topic covers importing them; there is no export back to raster.

Purpose

Load a scanned well-log raster and pin it to a well between an MD begin and MD end value, so the image lines up with the well track. A single image can be loaded interactively, or many images can be loaded in bulk from XML manifest files that carry the well identifier, image file name and depth calibration.

Launching the import

Open the Data manager and use the well context menu. There are two entry points:

• Right-click a single well and choose Load raster to import one image with the Open raster wizard.
• Right-click the Wells root node and choose Add rasters to import many images at once from XML manifests with the Open rasters wizard.

[image: placeholder_Data_manager_well_context_menu_with_Load.png]

Step-by-step: single image

1. In the Open raster wizard, press Browse and select an image file (filter Images (*.png *.xpm *.jpg *.jpeg *.bmp)).
2. In the Preview panel, correct the orientation if needed with the rotate buttons (↺ 90°, 180°, ↻ 90°) or Reset to return to the original orientation.
3. Zoom with the mouse wheel and pan with the middle mouse button. Drag the edges or corners of the crop rectangle to trim the image to the useful log strip.
4. In the Position group, set MD begin and MD end (in the project distance units, m or ft) to the measured-depth range the image spans.
5. Press OK to add the raster to the well. If no valid image is loaded the wizard warns Raster is not valid!.

[image: placeholder_Open_raster_wizard_showing_the_loaded_im.png]

Step-by-step: bulk import from XML

1. In the Open rasters wizard, press Browse XML files and select one or more .xml manifest files (filter XML files (*.xml)).
2. Each valid manifest is added to the table, showing the XML file, API, Min MD and Max MD read from the file. Remove a row with its minus button.
3. Each manifest names the image file to load (resolved next to the XML), the well identifier (API / UWI) used to match the well, and depth calibration points. Depths given in feet are converted to metres automatically.
4. Press OK to import all listed rasters. Wells whose identifier is not found in the project are skipped and reported; if no files were added the wizard warns No files were selected.

Notes

• Supported image formats are PNG, JPG, JPEG, BMP and XPM. The cropped raster is stored inside the project as PNG.
• In the single-image wizard the depth interval is entered manually; in the XML bulk wizard it is taken from the manifest calibration and the raster is cropped to that calibrated range.
• Import is one-way: rasters cannot be exported back to image files.

See Also

Import wells | Well Data Formats