Poland's gas monopoly PGNiG will apply for five licenses to explore potential unconventional shale oil resources in Poland, PGNiG's deputy head said.
The licenses will add to shale gas licenses PGNiG already owns, Marek Karabula said.
"We are preparing five motions to the Environment Ministry to expand our licenses to include exploration for shale oil," Karabula told reporters.
PGNiG, along along with major oil and gas companies including Chevron and Exxon Mobil, is involved in shale gas in Poland.
The monopoly, which produces some 4 billion cubic metres of conventional gas annually, has 15 licenses for its unconventional gas and expects some more precise estimates of its resources in the second half of 2011.