Optimization of the Distribution of Drilling Boreholes in Methane Production from Coal Seams

Abstract

The paper presents an evaluation of methane production from coal seams. The Warszowice-Pawłowice P ołnoc deposit was selected for numerical modelling of methane production. The numerical model was made for a fragment of this deposit of about 2 km. The numerical model was constructed for 6 seams. Three deposits were selected for simulation of methane production. Three horizontal boreholes were designed within the model area, referring to the existing Suszec19 borehole. A number of simulations related to methane production from the selected deposits were performed. They included different variants of the number of boreholes and also took into account the z-pinnate method. The analyses proved that the most advantageous is the production of 3 directional boreholes simultaneously with the z-pinnate method. For this variant the degree of methane production was 21.9% of the estimated resources.