RESERVOIR ROCKS FRACTURING MODEL DEVELOPMENT

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Автор: Kurovets S., Dr. Sci. (Geol.), Prof. Chair of the Department of Geology and Survey of Oil and Gas Deposits Ivano-Frankivsk National Technical University of Oil and Gas 15 Karpatska Str., Ivano-Frankivsk, 76019, Ukraine I. Artym, Assistant Chair of the Department of Geology and Survey of Oil and Gas Deposits Ivano-Frankivsk National Technical University of Oil and Gas 15 Karpatska Str., Ivano-Frankivsk, 76019, Ukraine
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Анотация: Summary. The developed model will allow evaluating the fracturing of the sandy seams, taking into account geodynamic processes. The model is based on the fact that the main factor in the formation of the original fractur- ing is stress-deformation state of the rocks during the period of active geodynamic processes. The intensity of the fracture formation depends on the level of internal stresses caused by deformation processes in some layers of the sandy seams. It is roughly assumed that high fracturing will be in places where internal stress exceeds the ultimate tensile strength (UTS) of the rocks. Information about mechanical properties of these rocks is necessary factor for the stress-deformation state estimation. In the first place, this is the value of Young's (elastic) modulus, the UTS and elasticity. Therefore, the first stage in the development of a workable model for fracture formation in reservoir rocks is the evaluation of the elastic modulus, the UTS and elasticity in these rocks. The mechanical properties of the Pre-Carpathian rocks are processed for such estimation. Samples of rocks were selected according to stratig- raphy, lithology and depth. Sediments of Cretaceous system, Paleogene and Neogene take part in a geological structure of the territory. Age of rocks, lithology and depth are taken into account when sampling for further research, because these parameters can change the mechanical properties of rocks. The 2D finite element model is developed, that model will demonstrate the dependence of fracture strength on the geometric characteristics of a sandstone seam within the anticline. The results of these studies will make it possible to better predict the high permeability zones for the epigenetic reservoirs formation. This will allow conducting the secondary explorations of the oil and gas accumulation within the oil-and-gas-bearing province of Carpathians.
Ключевые слова: Keywords: fracturing, stress-deformation state, finite element model, province of Carpathians, anticline.  
Данные для цитирования: Kurovets S., Dr. Sci. (Geol.), Prof. Chair of the Department of Geology and Survey of Oil and Gas Deposits Ivano-Frankivsk National Technical University of Oil and Gas 15 Karpatska Str., Ivano-Frankivsk, 76019, Ukraine I. Artym, Assistant Chair of the Department of Geology and Survey of Oil and Gas Deposits Ivano-Frankivsk National Technical University of Oil and Gas 15 Karpatska Str., Ivano-Frankivsk, 76019, Ukraine, . RESERVOIR ROCKS FRACTURING MODEL DEVELOPMENT. Восточно Европейский Научный Журнал. Геологические науки. ; ():-.



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