Conventional and Unconventional

The terms ‘conventional gas’ and ‘unconventional gas’ refer to natural gas differentiated primarily by the types of rocks in which they are found. Unconventional rocks include coal seams and shales.

Natural gas from coal seams is already well advanced in Australia, while shale has become an increasingly important source of natural gas in the United States in recent years. Extracting natural gas from less permeable rocks has been made possible through well stimulaton technology such as hydraulic fracturing.