The report validates methodology of volumetric estimation of unconventional gas resources in the structure of the Petišovci-Lovaszi oil-gas field. Oil and gas was peak-exploited in this area in the 1950-s but then the production declined to negligable quantities but resisted up to nowadays. However, already in the 1960, in deeper strata than the pre-existing oil-gas deposits, gas was found to be tightly bound in low-permeable strata, likely what is now known worldwide as tight gas, or shale gas or unconventional gas. This gas was recently explored by a British company Ascent which cooperatet wit one Hungarian company for geophisical measurement. On the initiative of Ascent we joined to validation of reserves of gas in place and by this way became a partner in the field of interpretation in the field of regional geology, interpretation of geophysical data, pattern of maturity, facies analysis etc.
F.02 Acquisition of new scientific knowledge
COBISS.SI-ID: 2051157This was invited lecture at the SMi ("Information for Business2) conference entitled Unconventional gas - 14-15 March in London. Occurences of energy resources of Slovenia were presented first. The lecture continued with presentation of geological factors whic are decisive for occurrence of deep unconventional gas in the Petišovci field. In this region, maturation of organic matter achived the stage ("gas window") in which gas could be formed. Other parts composed of Tertiary rocks in the Pannonian basin within the territory of Slovenia are not so much perspective (oil window was not reached). However, source rocks could be Pre-Tertiary rocks, but they have not yet been explored by deep drilling.
F.18 Transfer of new know-how to direct users (seminars, fora, conferences)
COBISS.SI-ID: 2032725Monitoring of coal gases is targeted to answer the question how gas composition changes naturaly and due to advancement of mine workings. In Velenje, CO2 and CH4 change naturaly in very wide ratios. CO2 is less mobile and predictive than CH4. CO2 is more tightly bound in pores - and it is a leading reason why sorption of this gas (and not so much CH4) is studied in this project. Interesting is also source of gases. In lignites occur normally biogenic gases, but in Velenje, carbon isotopic (13C) compositions of CH4 also indicated thermogenic origin. Gases with thermogenic carbon composition are considered to be endogenic or a result of bacterial activity via reduction of CO2.
E.03 Other
COBISS.SI-ID: 24696615