Gas firm PGNiG and chief refiner PKN Orlen will jointly research eight exploration licenses near the Bieszczady Mountains in southeastern Poland, PKN said, Reuters reported.
The Polish Geological Institute said 10% of tight gas from about 70 trillion cubic feet is recoverable. Exploring about 768 billion cubic meters of recoverable shale didn't increase production, Reuters said.
Chevron joins at least four other international energy producers who abandoned Poland because of disappointing results.
Reserve estimates were calculated by the company's independent reservoir engineering firm.
The U.S. Energy Information Administration cut Poland's technologically recoverable wet shale gas reserves by 21% from a 2011 forecast.
The company also reported that site preparation is nearly complete and the rig will begin moving on to the Angowice-1 well location next week.