Digitize Electric Log Well (E-Log) Image Description

Work is partially supported by the U.S. Department of Energy (DOE) National Energy Technology Laboratory (NETL) under Grant Number DE-FE0002056.

The electric well log image digitizer tool was created to provide a simple method to digitize small sections of well log images into a digitize Log ASCII Standand (LAS) File. The user may only be interested in a short stratigraphic section for a specific study, i.e., to do a PfEFFER Analysis over a depth range and needs to digitize 100 to 200 feet from a Resistivity well log and a Neutron-Density well log. This program allows the user to digitize the well log curves over the depth range needed and to save that data in a LAS version 2.0 format. The program allows the user to import a PNG (Portable Network Graphics), JPEG (Joint Photographic Experts Group) or GIF (Graphics Interchange Format) image file.

NOTE: The program can not handle the complete well log image, only small image captures in the above image formats.

This web application was primarily created to digitize small sections of scanned well log images, but the web application will do the following,

• DIGITIZER - Digitize multiple image sections from multiple logs and be able to merge the data into one LAS 2.0 file.
  • Digitize Linear Curves
  • Digitize Logarithmic Curves, i.e. Resistivity, Permeability Log tracks
• MERGE - Merge multiple LAS files into one LAS 2.0 File.
  • User will be able to select the curves from each file they wish to merge into the new file.
  • The user will be able to select the depth range they wish to save, by just setting the START, STOP values.
  • The program will capture all the curves in the files even the curves that are not in the "KGS Standardize Mnemonics" List. Note: Only numeric data.
• SPLIT - The program will split the log data from a LAS 3.0 file and create one LAS 2.0 file.
• CORRECT - To read in a LAS file that has a bad data section, digitize the section and merge the data back into the LAS 2.0 file.

This web application will take advantage of over 11 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 Program saves the data as a Log ASCII Standard (LAS) version 2.0 file. The web application can also read any number of Log ASCII Standard (LAS) version 2.0 & 3.0 files at one time using the standard developed by the Canadian Well Logging Society¹ .

Reference:
(1) LAS 3.0 Log ASCII Standard Document #1 File Structures by Canadian Well Logging Society: http://www.cwls.org/las_info.php

Author: John R. Victorine jvictor@kgs.ku.edu

The URL for this page is http://www.kgs.ku.edu/software/DEWL/description.html