LAS File Viewer Description

The LAS File Viewer Web Site was created so that users may view digital LAS Files (Log ASCII Standard) versions 2 & 3 on their PCs. This new version adds a number of new features. The older version restricted the number of plot tracks that could be displayed at any one time. This version automatically reads and parses the digital LAS file and groups the log curves into standard KGS log curve types, i.e. Neutron Porosity, Bulk Density, etc. The program then determines the type of log, i.e. Neutron/Density Log and automatically displays a number of standard plot tracks. Although the program displays a set number of standard plot tracks, the program also has a control dialog that allows the user to turn plot tracks on or off and even change the order of the plot tracks. The user can save that image as a Portable Network Graphics (PNG) image file.

A LAS File Viewer basic function: To assist the geologist in collecting, organizing, and plotting the geological data by depth. Digital LAS File Data Horizons (Formation Tops) Data Core/Rock Data, Measured & Observational To create Automatic rule based tools that will predict rock lithology and rock texture from Digital LAS Files - Gamma Ray & Litho-density Log Curves (NPHI,RHOB,PE) Measured Core Data - Whole Core & Plug Data Rock Observational Data (Geologist core/cutting descriptions) To save the collected data as digital Log ASCII Standard (LAS) version 3.0 File. To save the generated plot image as a Portable Network Graphics (PNG) Images & Portable Document Format (PDF) Documents.

The web applications will take advantage of over 16 years of Java development experience at the Kansas Geological Survey (KGS) in developing web applications that plot oil & gas data and allows the geologist to perform analysis with that data, i.e. GEMINI Project & Tools on the KGS Web Site.

GEMINI (Geo-Engineering Modeling through INternet Informatics) Project was developed to allow the geologist to seamlessly integrate databases and geological analytical tools across the web. Analytical tools were designed for the independent oil and gas operators, consultants, and widely separated team members within and outside companies.

The web application is being designed to save the data to the PC using the Log ASCII Standard (LAS) version 3.0 developed by the Canadian Well Logging Society . This version provides a means to collect all the well geological data in one file. Although the LAS 3.0 Format has default data types, the user can add their own data types to the file provided they use the primary section types, i.e., Parameter, Definition and Data whenever possible, which are briefly paraphrased below, ¹

• ~NewSection_Parameter contains a one dimensional data item consisting of (usually but not restricted to) one or two elements. Each line also contains a full description of that data.
• ~NewSection_Definition although structurally identical to a Parameter Data lines (see above), each Column Definition line is used to describe each matching (by order) channel contained in the matching Column Data section. The name, unit, log code, description and format (if used) contained in each Column Definition line fully describe the channel it refers to.
• ~NewSection_Data | NewSection_Definition
Each line contains a series of delimited data values. The delimiting character is defined by the value of the DLM parameter in the ~Version section. Descriptions of each data are contained in the matching Column Definition section.

Reference:
(1) LAS (Log ASCII Standard) Canadian Well Logging Society: http://www.cwls.org/las/

Author: John R. Victorine jvictor@kgs.ku.edu The URL for this page is http://www.kgs.ku.edu/stratigraphic/JAVA_SRC/VIEWER/index.html