Frequently Asked Questions
Low-volume hydraulic stimulation of sandstone, as used in Petišovci, and high-volume hydraulic fracturing of shale are not just different in terms of the types of rock and the volumes of water used. There are other major differences including the depth of the gas reservoirs, the many layers of impermeable shale between the reservoirs and the water courses, and in the number of fracturing operations per well. Further details and a comparison table can be found on the Protection of Underground Waters page. See also the Safe Gas Extraction page.
The European Commission recognises that high-volume hydraulic fracturing 'raises specific challenges, in particular for health and environment' and it issued Recommendations to member states on 22 January 2014 on minimum principles for its use. It has not identified low-volume hydraulic stimulation as carrying the same level of risk.
In July 2014 the Slovenian government issued a new 'Decree on environmental encroachments that require environmental impact assessments' which made the Environmental Impact Assessment far more demanding. With these new regulations, Slovenia's criteria for hydraulic stimulation operations are more stringent than the European Commission's recommendations.
Our operations are continually inspected by inspectors from the relevant ministries to ensure they comply with these laws and regulations.
For further information please see the Regulation and Compliance page.
For further information please see the comparison table on the Protection of Underground Waters page.
Further information can be found on the Protection of Underground Waters page.
In the event of drilling a new well, approximately 15 trucks are needed to transport equipment to the site. Once the equipment is delivered the trucks leave the well site. When all the drilling and completion works are finished, the trucks return to remove the equipment from the site. During drilling or other operational works, approximately one truck a day is used to bring regular supplies to the site.
Natural gas and oil have been continuously produced in this area since 1943. During this time more than 160 wells have been drilled. Further gas production from new wells will constitute only a fraction of the production that has already taken place. The operations carried out in 2011/2012 and those planned for the future are a continuation of operations that have taken place here for over 70 years. To date, no adverse impacts on the environment have been observed or reported.
All our operations comply with existing mining and environmental regulations and are also subjected to continual, strict inspections carried out by mining and environmental inspectors. Complying with national and EU regulations and employing safe, industry-standard working practices minimises all risks associated with the environment.