PROSPECTS AND PROBLEMS OF DEVELOPMENT OF SOURCES OF UNCONVENTIONAL HYDROCARBON OF THE VOLYN-PODOLIA OIL AND GAS FIELD OF UKRAINE

• Дата: 2015
• Автор: Lazaruk, Ja.G.
• Формат: Стаття
• Мова: Українська
• Опубліковано: Institute of Geological Sciences, NAS of Ukraine 2015
• Теми: unconventional gas; shale gas resources; Silurian; organic substance; catagenesis
• Онлайн доступ: http://geojournal.igs-nas.org.ua/article/view/139150
• Назва журналу: Geological journal

Resources and the state of extraction of shale gas in the world have briefly been described . The results of exploration for shale gas in the Baltic Sea basin and Lublin Poland, which borders on the Volyn-Podolia oil and gas region of Ukraine have been given. Stratigraphic, lithological characteristics and features of the occurrence of Silurian sediments Volyn-Podolia, prospective for shale gas have been mentioned. The data on the physical properties of rocks, scattered amount of organic substance and the degree of catagenesis conversion have been given. The comparative analysis of mentioned parameters on the Polish and Ukrainian territories has been carried out. It was established that due to the degree of catagenesis conversion of low porous Silurian rocks in western Ukraine may generate gas from diffuse organic substance. Specified for direct signs of gas content of Silurian sediments. The methodological approach to assessing of the shale gas resource has been proved. To diagnose parent rocks and determination of performance used information on the distribution of concentrations of organic substance and its genetic type, quantity and composition bitumoyidiv and hydrocarbon geochemical facies types, along with the maximum immersion depth litofacies complexes, paleotemperature catagenesis maturity of organic substance. Schematic maps containing average geochemical parameters required to calculate the resources of shale gas have been constructed based on generalized data. Geochemical maps are combined with schemes thickness of gas-generating Silurian sediments and tectonic maps. Typical estimation areas characterized by similarity to lithofacies close by the degree of catagenesis transformation of organic substance and the total thickness of gas-generating rocks have been highlighted. Complex analysis of the specified parameters made   it possible to identify the specific density of hydrocarbon generation in the reference areas and as the results to estimate recoverable resources of shale gas of Oleska area in the amount of 120-150 billion m3.