The world energy consumption is going to rise by nearly 50% in 2050 when compared to 2010. With conventional and unconventional reserves depleting, demand for energy supply is rising. The feasibility and the current efficiency of renewable energy sources may not be capable of satisfying the world energy demand by themselves. Increase in production of non-renewable energy source, i.e., the fossil fuels may help to fulfill the energy requirement of future generations. Shale gas is one of the unconventional sources of energy. Shale gas deposits are scattered all over the planet in low-permeability and low porosity reservoirs. India has overall reserves of shale gas between 600 and 2000 TCF, of which 63 TCF is of recoverable shale gas (Pradhan and Prakash 2000). Shale production depends on many factors such as political matters, wars, social and economic aspects, and exploration techniques. Depending on the recoverable reserve (RR), production of shale gas entails different methods and with a different method, comes different problems described and discussed in this manuscript. Along with the problems, the technically recoverable reserves of different countries, different production mechanisms, and economic aspects of shale gas are also discussed.

与2010年相比，到2050年，世界能源消费量将增长近50％。随着常规和非常规储量的枯竭，能源供应的需求正在增加。可再生能源的可行性和当前效率可能无法独自满足世界能源需求。不可再生能源（即化石燃料）的产量增加可能有助于满足子孙后代的能源需求。页岩气是非常规能源之一。页岩气沉积物散布在低渗透率和低孔隙度储层中的整个地球上。印度的页岩气总储量在600至2000 TCF之间，其中63 TCF是可回收的页岩气（Pradhan和Prakash 2000）。页岩的生产取决于许多因素，例如政治问题，战争，社会和经济方面，以及勘探技术。根据可采储量（RR）的不同，页岩气的生产需要采用不同的方法，并且采用不同的方法时，会出现本文档中描述和讨论的不同问题。除了这些问题之外，还讨论了不同国家的技术可采储量，不同的生产机制以及页岩气的经济方面。