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LAS and Ascii File Import – Single Well

The “Import Single Well – From 1 file” function is designed to create a single MDB file from a single LAS or LIS file.

    Begin by opening the HDSlog Main Menu. There are two ways to access the load files feature. There is a sidebar button under the Import/Export section named “Import – LAS (Ascii)” and the Import/Export tab on the toolbar with a dropdown menu containing the same button.

    Look over the options in this window under single well upload. They are “New well ­- From one file”, “New well – From 2 or more files, and “Add to existing well”.

Helpful Hint: Underneath is the add multiple wells option, “Batch New Wells”. If you’re interested in loading batch wells, please refer to the “Loading multiple files” tutorial page below. Underneath more input options, you’ll see a project management tab. For projects, please refer to our “Project Creation and Management” section.

    HDSlog automatically defaults to a sandstone matrix, but if your wells are logged in limestone, click on the standard defaults box and switch the default to limestone. You can also change your default sonic equation and borehole temperature definitions in this window.

    Once you are satisfied with your options, save and exit the window.

    Choose your service company. This will tell HDSlog what your logging company calls the curves. If this is unknown, default to Schlumberger.  You can define unknown curve names later.

    Find your input file. You should have already loaded your LAS files into the LAS and Ascii folder in the HDSlog program folder in the main drive, and you will be able to easily click through the file path to where your LAS files are stored.

    After locating your LAS files, simply choose one, decide where to save it, and click the load button.

    After clicking load file, a well units and porosity range window will pop up. You can select English or metric units, or any mixture of the two by clicking back and forth in the option bubbles. Also select your porosity range in this window.

    Click continue.

    In this next window, there is one final check before loading the file into HDSlog. This is called the curve definition/selection window. If there is an issue with the curve names or unit assignments you created in the last window, HDSlog will detect it.

    HDSlog will mark curve names that it does not recognize in red or purple. Click on the name, and a window with curve identifiers will pop up. Find the one your curve name represents and click on it to connect it to the curve. This ensures HDSlog loads the curve data properly and can pull that curve out for the correct calculation uses.

    Detection of an incorrect curve unit is represented as a red text unit. To correct, click the red text unit, and it will convert the units.

Helpful Hint: If there is a mistake in conversions, or if the units are off (if you tell porosity to convert from percent to decimal and it was already in decimal, the curve generated will almost be a straight line because it has added another two places in front of the data) you can always fix it later in the Control Panel.

    The last thing you need is the row of green Y’s in the load column. Using the green Y’s, you can choose to not load certain curves. Just click the green Y and it’ll change to a red N. 

    After reviewing your file, save, wait for the program to load, and exit. You have now successfully loaded a LAS file to the HDSlog system. At this point, you can exit the program, load more files, or choose to begin processing the well log in Log Plots.

Quickstart Version

  • Open the HDSlog Main Menu from your desktop
  • Click the sidebar button labelled “Import – LAS (Ascii)” OR there is a button under the Import/Export tab dropdown menu with the same name
  • Select the “New Well – From one file” option in the Import window
  • Click on the Standard Defaults box.
  • Choose the correct calibration matrix. Default is sandstone
  • Change the default sonic equation
  • Change the default borehole temperature.
  • Once you are satisfied with your options, save and exit the window
  • Choose the service company. Default is Schlumberger.
  • Select your input file from the file explorer in the Import window   
  • Rename your file
  • Choose the save location of the created MDB
  • Click “Load File”

    After clicking load file, a well units and porosity range window will pop up.

  • Select English or metric units for each input
  • Select porosity range
  • Click continue

    In this next window, there is one final check before loading the file into HDSlog. This is called the curve definition/selection window. If there is an issue with any of the data, HDSlog will detect it. Incorrect curve names or units will show up as colored text in in their respective columns.

  • Click on colored text in the Input Name column to identify unrecognized curves
  • Click red text units in the Convert column to convert incorrect units
  • To choose not to load a curve, click the green Y’s in the Load column. They will turn to red N’s
  • Rename your curve set
  • Correct depth range if needed
  • Review your file
  • Save
  • Exit to Main Menu or choose to load another well