Opening DLIS Files

The DLIS file type is primarily associated with DlisBrowser.

DLIS	File extension: DLIS
	File type:	well log

What is a DLIS file?

DLIS files mostly belong to DlisBrowser by DlisBrowser. A DLIS file is a data log generated by sensors mounted in petroleum wells. Such a data log is saved in the database format defined by the Digital Log Interchange Standard. The contents of a DLIS log file are structured as a database of oil well metrics such as porosity, sonics, resistivity, and other information which are used to determine whether a formation contains hydrocarbons in commercial quantities. Programs such as DlisBrowser, PPDM Data Model, and EzTools may be used to view and analyze logs saved in DLIS files. This format is obsolete.

How can I open a DLIS file?

You need a suitable software like DlisBrowser to open a DLIS file. You need a suitable software like DlisBrowser from DlisBrowser to open a DLIS file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your DLIS file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a DLIS file directly in the browser:. Just drag the file onto this browser window and drop it.

Online DLIS Text Viewer

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Can't Open Your .DLIS File? Try These Steps

Because .DLIS files can originate from various specialized programs, they aren't universally openable.

1. Identify the Source: These files typically come from oil and gas professionals or well-logging workflows, suggesting specialized petrophysical software.
2. Check the Header: Open the file in a hex viewer to inspect its first bytes.
   • "V" or version numbers often imply a standard well log database.
   • "PK" indicates a zipped archive.
   • Readable XML/JSON suggests a text-based export.
3. Use the Original Software: The original program is usually required; try tools like DlisBrowser, Schlumberger Techlog, or Interactive Petrophysics, or ask the sender if uncertain.
4. Use this Webpage: Drag and drop your file into our viewer to detect its format, extract readable metadata, and preview the contents when possible.

DLIS format details:

To find out what program is needed to open DLIS files, you need to determine the file format. Each file format has a unique extension and almost always a unique signature. For example, Microsoft Word documents have the extension .docx and the signature (usually the first 3 characters in this file) PK. However, different programs can use the same file extension. Furthermore, a file extension can be renamed incorrectly and double-clicking on it will then display an error when it is opened. So a detailed analysis of a file is vital in order to determine the format and the associated program. Below you will find our evaluation of the DLIS files:

The DLIS file extension is primarily used by a single program. The two most common formats are as follows:

• 85% of all DLIS files belong to Digital Log Interchange Standard well format. These files contain neither text nor words, but only data. The files are 210 KB to 70 MB in size, with a median of 4 MB. The file type was created 10 years ago, but is still used today. The keywords SEQUENCE-NUMBER, FILE-HEADER4, 1V1.00RECORD 8192Default Storage Set and DLIS are typical for these files. Such DLIS files store data about proc, composite, sonic, image, edta, mcfl, petrophysical, repeat, brsa, pass and usit.
• 9% of all DLIS files start with the bytes 00 00 00 00 00 00 00 00 5C, which are crucial for this file format. These are binary files, so they do not contain words or text. The average file size is 1 MB with most files being between 230 KB and 70 MB in size. The files contain the following words: FILE-HEADER4, SEQUENCE-NUMBER, 0000000001, 0001V1, 00RECORD08192, INSITE and DLIS. Files like these are sometimes connected to xrmi, combo and mlwd.

All other DLIS files (6%) have different formats. Files like these are sometimes linked to processed, petrophysics, station, casing, result, yakaar, down, inch or prod. Drag & drop your file here to see the file format and a preview of your DLIS file!