Numerical Studies of Advanced Methane Drainage Employing Underground Long-Reach Directional Drilling

Wiesław Szott (), Małgorzata Słota-Valim, Piotr Ruciński, Krzysztof Miłek and Piotr Łętkowski
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Wiesław Szott: Department of Hydrocarbon Reservoir and UGS Simulation, Oil and Gas Institute—National Research Institute, 31-503 Krakow, Poland
Małgorzata Słota-Valim: Department of Geology and Geochemistry, Oil and Gas Institute—National Research Institute, 31-503 Krakow, Poland
Piotr Ruciński: Department of Hydrocarbon Reservoir and UGS Simulation, Oil and Gas Institute—National Research Institute, 31-503 Krakow, Poland
Krzysztof Miłek: Department of Hydrocarbon Reservoir and UGS Simulation, Oil and Gas Institute—National Research Institute, 31-503 Krakow, Poland
Piotr Łętkowski: Department of Hydrocarbon Reservoir and UGS Simulation, Oil and Gas Institute—National Research Institute, 31-503 Krakow, Poland

Energies, 2025, vol. 18, issue 14, 1-39

Abstract: This paper presents the procedures and results of the numerical modelling and simulations performed to analyse an innovative method of advanced methane drainage employing underground long-reach directional drilling (LRDD) technology. The analysis involved the implementation of geomechanical and dynamic reservoir models to simulate processes in coal seams and the surrounding rocks during coal mining and concurrent methane drainage, in accordance with the proposed technology. The analysis aimed to quantitatively assess the effectiveness of the technology, evaluate its sensitivity to the geological and geomechanical properties of the rocks, and identify the potential for optimisation of its technological and operational parameters in the proposed strategy. The works presented in this paper include the following key tasks: the construction of a system of geological, geomechanical, and dynamic simulation models; the analysis of the geomechanical effects of various types and regions of occurrence; the implementation of the correlation between the geomechanical states of the rocks and their transport properties; and the performance of the effectively coupled geomechanical and reservoir fluid flow simulations. The proposed approach was applied to the specific conditions of the multi-seam Murcki–Staszic Coal Mine operated by Jastrzębska Spółka Węglowa, Poland.

Keywords: coal seam; methane drainage; directional drilling; geomechanical modelling; dynamic modelling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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