A METHODOLOGY TO DETERMINE BOTH THE TECHNICALLY RECOVERABLE RESOURCE AND THE ECONOMICALLY RECOVERABLE RESOURCE IN AN UNCONVENTIONAL GAS PLAY

During the past decade, the worldwide demand for energy has continued to<br>increase at a rapid rate. Natural gas has emerged as a primary source of US energy. The<br>technically recoverable natural gas resources in the United States have increased from<br>approximately 1,400 trillion cubic feet (Tcf) to approximately 2,100 trillion cubic feet<br>(Tcf) in 2010. The recent declines in gas prices have created short-term uncertainties and<br>increased the risk of developing natural gas fields, rendering a substantial portion of this<br>resource uneconomical at current gas prices.