(Reuters) -Saudi Aramco has discovered natural gas fields in four regions of the kingdom, the Saudi Press Agency reported on Sunday, citing Energy Minister Prince Abdulaziz bin Salman. The fields were found in the central area of the kingdom, in the Empty Quarter desert, near its northern border and in the eastern region, he said, according to the state news agency. Saudi Arabia wants to increase gas production and boost the share of natural gas in its energy mix, replacing crude and fuel oil, to meet growing electricity consumption and to make more crude available for export. The minister sai…