Combined Underground Gas Storage and Enhanced Oil Recovery in a Fractured Reservoir

The Schönkirchen Tief reservoir is located in the Vienna Basin. The reservoir contained 19 mn m3 oil originally in place. The<br>current recovery factor after 45 years of production is 59 %. The field was produced by water injection. The wells, located at<br>the crest of the high relief structure are exhibiting a high water cut. In 2006-2007, a comprehensive study was performed to<br>optimise the future development of the field.