166 Before the workover After the workover Figure 1. Gilowice-2H well workover The average thickness of the target 510 coal seam is 5.28 m, the gas capacity of the seam is 13.7 m3/Mg, the methane content is 97,7%, and the seam permeability is 0.2-0.8 mD. The Gilowice-2H well, with a total depth of 2300 m, is located in a significant part (1505 m) in the 510 seam. The location of the seam and the location of the boreholes are shown schematically in Figure 2. Figure 2. Wells location Multi-stage hydraulic fracturing was carried out in the Gilowice-2H well. These processes used cluster perforation of casing pipes and plug and perf technique. In each of the fracturing operations, approx. 800 m3 of fracturing fluid and approx. 80 Mg of proppants were used, and the flow rate was 8 m3/min. As a result of the work, an influx of methane was obtained. In the initial period, the capacity was about 10 000 m3/day, after which it stabilized at the level of 5200-5400 m3/day. Similar work was also carried out in other wells in Gilowice and Międzyrzecze. The methane obtained allowed for the installation of a gas generator with a capacity of 1MW, and the electricity received was sold to the power grid. At this stage, the implementation of projects related to pre-mining methane drainage of coal seams (CBM) in Poland has been completed. As mentioned earlier, this was also associated with changes in the composition of ICE-CMM Poland. A company related to the oil and gas area resigned from operating within the Centre, while entities closely related to coal mining joined. Cooperation within the center focused on the joint implementation of projects to increase the efficiency of methane drainage and reduce methane emissions into the atmosphere. Companies associated in ICE-CMM Poland have jointly prepared and applied for funding for various research and development projects. The most interesting projects were carried out after obtaining funding from the Research Found for Coal and Steel (RFCS) of the European Union. The objectives of the implemented projects and the results achieved are presented below. In the years 2019–2023, an international consortium consisting of three members of the Center and the Universidad De Oviedo and the Imperial College of Science, Technology and Medicine, implemented the project under the acronym DD-MET. The aim of the project was to use an
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