On 8 July 2023, the petrochemical companies OMV and Total announced that after a study of natural gas deposits in the Bulgarian exclusive economic zone in the Black Sea, it was estimated that up to 13 billion cubic meters of natural gas could potentially be extracted.
On July 8, 2023, OMV and Total revealed that an assessment of natural gas reserves within Bulgaria's Black Sea Exclusive Economic Zone had indicated a potential for extraction of up to 13 billion cubic meters.