The Persian Gulf's gas-poor nations, such as Saudi Arabia, are resorting to costly unconventional projects to help find enough reserves to meet growing domestic demand from power-generation and industrial sectors, write Vahe Petrossian and Nassir Shirkhani.

Saudi Arabia’s efforts in the past decade to find gas in the Empty Quarter and the Red Sea have largely failed, forcing it to look at tackling its unconventional shale gas potential, officially estimated at 600 trillion cubic feet.