Niobrara is a mixed shale & chalk play located in several basins. Elevation contours are measured in feet (ft) and defined as true vertical depth to producing formation top and calcuated by subtracting true vertical drilling depth from the elevation reference measured at the drilling site. Source: U.S. Energy Information Administration based on data from various published studies. Updated January 8, 2015.
The U.S. Energy Information Administration shall not be held liable for improper or incorrect use of the data described and/or contained herein. These data and related graphics, if available, are not legal documents and are not intended to be used as such. The information contained in these data is dynamic and may change over time. The U.S. Energy Information Administration gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data.
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