Shell has been involved in developing oil shale technology for more than 50 years. A combination of laboratory and field testing covering a wide range of technologies from mining to steam processes to electric heaters has brought clearly into focus both the challenges and opportunities for a commercial oil shale project. To date, Shell has conducted eight Colorado field pilots in the oil shale resource with increasing scope, cost, and complexity. The majority of effort since 1981 has been devoted to actively studying important elements of the In-situ Conversion Process (ICP). The current focus is to complete the freeze wall test and to continue laboratory testing and modeling efforts to develop robust test programs to convert the three Research, Development, and Demonstration (RDD) leases under the terms of the Energy Policy Act of 2005.