Poszukiwania niekonwencjonalnych złóż gazu ziemnego w rejonie Wysina

Artykuł zawiera podstawowe informacje dotyczące robót geologicznych prowadzonych na terenie Polski w poszukiwaniu niekonwencjonalnych złóż gazu ziemnego z formacji łupkowych (shale gas) oraz podsumowanie prac prowadzonych przez PGNiG S.A. w rejonie koncesji „Stara Kiszewa” w okresie do końca 2016 r.

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Intensive work aimed at defining the production potential of gas from unconventional shale gas resources started in 2010. One hundred and twenty-two concessions in total were granted to fuel concerns from Poland and from abroad. In the years 2011–2016 seventy-two wells were drilled in total , out of which 28 underwent hydraulic fracturing treatment and testing. The increased interest in shale gas noted in the years 2010– 2013 dropped and companies started withdrawing successively from the exploration. Polskie Górnictwo Naftowe i Gazownictwo S.A. (Polish Oil and Gas Company), within the posessed licences carried out work in order to gain information about the possibility to obtain natural gas from shale formations. After analysing data from the regions of Pomerania, the region of Wysin was recognised as one of the most interesting regions which fell within the scope of the “Stara Kiszewa” licence area. Drilling work started with designing and making Wysin 1 exploratory well in 2013. Based on the result of this well, two horizontal wells: Wysin-2H and Wysin-3H were designed and made together with fracturing operations and production testing. After analysing the results of the conducted tests, it was ascertained that the early Palezoic formations in the Baltic Basin are perspective as far as shale gas resources are concerned, however, currently (at considerable access costs and a low price of the raw material) it is not economically justified.