During the first 8 months of 2005 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 2005 in Illinois is estimated at 1.2 million barrels.

Estimates were also made for the month of December, 2004. See 2004 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 111,179 bbls of oil. A correction of 23,000 bbls was estimated for the non-reporting gatherer giving a total of 134,179 bbls for Allendale field in 2005 as listed in the annual report.

The corrections below (in bbls) were added to 2005 reported field production values. If a field is not listed, no correction was deemed necessary.

Click here to acknowledge and proceed to 2005 annual report