Slovenia Insider.com16 Mar 2019 19:19
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With the question of whether Arso acted correctly and whether the process in Petišovci was really just a stimulation of boreholes or a more "dangerous fracking", we turned to an independent univ.dipl.inž. geology of Marko Kocevar , from GeoTrias doo . Kocevar is a recognized geologist, it deals with engineering geology, and especially with the problems of liner structures (gas pipelines, motorways and railway lines), individual bridging facilities, tunnels and covered excavations. In the framework of the intervention measures CZ was engaged in avalanches and rocky stretches, and also participated in the preparation of project documentation for landslide avalanches.
The main important projects carried out: research of coal and gas outbursts in Velenje coal mine, rehabilitation of Karavanke tunnel, geological and geotechnical research for AC tunnels Dekani, Markovec, Kekec, Lešnica, Senarska, geological and geotechnical research for gas pipelines M2 / 1 Kidricevo - Vodice, M9 Lendava - Kidricevo, M9 Kidricevo - Vodice, M3 / 1 Kalce - Vodice, M8 Kalce - Jelšane.
He is the author and co-author of several professional articles published at home and abroad and a member of the Geotechnical Society of Slovenia , where he is chair of the section for mechanics of rocks and underground works and has a professional examination according to PGI (RG-0059).
The expert told Insajder.com:
"Your question needs to be answered first, at the basic level. Who will the minister entrust to, if not to the expert services? If the Minister does not take into account the opinions of his professional services, it is best to disband them.
The second question concerns the method of obtaining gas in Petišovci. As far as I know, they have been producing gas for at least 50 years. When they started getting gas, the "fracking" did not exist yet.
As far as I know, in the Pannonian lowlands, gas (as well as other hydrocarbons) is trapped in Miocene sandstone. These rocks are porous and are more or less permeable, so they need to be a little "broken" - or to increase the coefficient of permeability by hydraulic fracturing. If I use additional chemicals, I do not know. The technology is at least 100 years old.
In contrast, there are enormous amounts of oily slags containing kerogen in the United States. However, the production of gas and oil from these shales (kerogen) needs a little more effort. This is where chemistry and high temperatures and a ruined environment occur. The technology is fairly new, I think it's about 20 years old and it is still developing ... but it's very expensive, and it's rewarding for really large amounts of gas, oil. "