"Today’s announcement regarding the offer of 27 blocks gives those successful companies assurance about the blocks that they will be formally offered later in the year," OGA Chief Executive Andy Samuel was quoted as saying in the regulator's statement.
At present additional 132 blocks are being assessed, according to the statement.
The move will give legitimacy to the country’s nascent fracking industry, create additional employment and contribute to the economic growth of the country's energy industries, according to UK Energy Minister Lord Bourne.
The exploration sites, covering over 100 square miles, encompass areas of the Midlands and the North East.
The decision was made during the 14th onshore licensing round, the first in seven years. It was launched on July 28, 2014 and lasted up to late October 2014. The OGA received a total of 95 applications from 47 companies.