During the month of December, 2004, one oil gatherer did not report the majority of their oil purchases to commercial information gathering services. To account for the unreported volumes, production estimates were made by ISGS Oil and Gas Section staff member Bryan Huff on a lease by lease basis based on production histories before and after the non-reported period. The total unreported volume for 2004 in Illinois is estimated at 157,350 barrels.

Estimates were also made for 2005. See 2005 annual report for details.

The values were totaled on a field basis and added to reported values for a field.

Example:

for 2005 in Allendale field old gatherers reported buying 156,600 bbls of oil. A correction of 2,800 bbls was estimated for the non-reporting gatherer for December giving a total of 159,400 bbls for Allendale field in 2004 as listed in the annual report.

The corrections below (in bbls) were added to 2004 reported field production values. If a field is not listed, no correction was deemed necessary.

Click here to acknowledge and proceed to 2004 annual report