Illinois Oil and Gas Resources (ILOIL) 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.

ILOIL interface

The current ILOIL application was built using Esri ArcGIS for Server version 10.1, Esri’s ArcGIS API for Flex version 3.3, and the Adobe Flex SDK 4.6.0.

The application software and hardware are updated as necessary to provide greater stability more functionality for our users.  If you have any trouble with the site please contact Melony Barrett.


  • Your browser (Google Chrome, Mozilla Firefox, Internet Explorer, etc…) must have JavaScript enabled.
  • You must have the Adobe Flash Player installed on your computer.  You can install the Flash Player now by clicking on the “Get ADOBE FLASH PLAYER” button below.  Otherwise, you will be prompted to install it when you launch ILOIL.

 Adobe Flash Player download button

  • If you continue to be prompted to install the Flash Player even though you have already installed it, try deleting the Flash Player Temp files.  (Hint:  Go to Control Panel > Flash Player.  In the Flash Player Settings Manager dialog box, click the Advanced tab, and then click the Delete All… button.  In the Delete All Site Data in Flash Player dialog box, check the box next to Delete All Site Data and Settings, and then click the Delete Data button.  Finally close the Flash Player Settings Manager.  Try launching ILOIL again.).
  • To access well summary sheets, logs, scout check tickets, core analysis reports, and oil field statistics your computer must allow traffic on port 7778.