Illinois Oil and Gas Resources Interactive Map


The Illinois Oil and Gas Resources mapping project enables on-line access to a large database of over 200,000 Illinois oil and gas well records. This database has been in development for many years by the Illinois State Geological Survey. Traditionally, these well records have only been available during regular business hours at the Geological Records Unit in Champaign, Illinois.

In addition to oil and gas records from the ISGS wells database, users can view other data layers like producing horizons, samples, core analysis data, structure contours, waterflood areas, and oil fields. Through these layers the application also provides access to other resources including well summary sheets, logs, scout check tickets, core analysis reports, and oil field statistics.

Desktop and Mobile Application in one!

The latest version of ILOIL runs plugin-free in any modern browser such as Google Chrome, Mozilla Firefox, Microsoft Edge, or Safari. This new version of ILOIL will also run responsively on a smartphone or browser.

Click this button to launch the new ILOIL!

Legacy Flash Application Still Available!

To ease the transition to the new application, the legacy Flash-based application will be available for a short time. Please visit Accessing Legacy Flash-based ISGS Interactive Maps to learn how to access the application.

Viewing Logs

BlueView is an application to display TIFF (Tagged Image File Format) log image raster files on a Windows system. It is specifically designed to handle the very long narrow images that logs generate.

BlueView Log Image Manipulation Software is offered for download from Schlumberger.

If you have any problems with any of the application functionality, desktop or mobile, please contact Melony E. Barrett by email ( or phone 217-333-7917