The evaluation of the world potential of shale gas reserves

At present there are no accurate estimates of the shale gas reserves in the world as we have no so far reliable techniques to determine the size of shales entrapping shale gas. In the recent decades, some additional geological surveys were conducted which provided new data about shale gas reserves in different world regions. However, all available forecasts may be treated as tentative as they give only potential volumes of shale gas that could be extracted by applying available technologies. © Springer International Publishing Switzerland 2016.