• Water shut-off technology in gas wells with a post-treatment production stimulation
  The article presents the control of water production in gas wells using Multizol-35 working fluid. It is a micellar fluid that forms a gel in situ with reservoir water containing up to 17% (m/m) NaCl. It was developed at the Oil and Gas Institute – National Research Institute in Krakow and consists of an environmentally friendly aliphatic solvent modified with ester oil and amphiphilic surfactants. Oscillation tests were performed on Multizol-35 gels, which showed that, depending on the ratio of this liquid to brine, gels with varying viscosities are formed, which is of fundamental practical importance. Next, core flow tests were conducted to quantitatively assess the effectiveness of the working liquid based on changes in the permeability of rock samples after the working fluid was injected into them under simulated conditions of the near wellbore zone. They showed that for cores simulating water saturated layers, an RWP coefficient since 0% up to 1,5% was obtained, which means that the permeability of these samples to brine was completely eliminated. In contrast, samples simulating the gas layer yielded an average value of 86.0%... dalej
• GPU-Accelerated Integrated Modelling of UGS Wierzchowice
  The article presents the process of building an integrated model of the Wierzchowice Underground Gas Storage (UGS), comprising static, dynamic, and production models. The methodology included data acquisition, analysis of cores, well logs and 3D seismic, and the construction of stratigraphic, sedimentological, and facies models, which together formed
  a static model later transformed into a dynamic model using Petrel/Intersect software. The model was calibrated to 50 years of field and storage history, achieving high consistency with measurement data. A key element was the use of a computing environment based on Graphics Processing Units (GPU), which reduced simulation runtime from several days to minutes. An integrated model was also built using Intersect–Pipesim coupling, allowing full representation of the interactions between the reservoir and the surface network. The results confirmed the possibility of increasing the working gas capacity and maintaining stable cyclic operation, while also indicating the need to optimize injection and withdrawal processes to minimize gas quality deterioration caused by mixing... dalej
• The application of the acoustic emission method for testing of the cryogenic pressure equipment
  The article describes the works which were connected with developing the methodology enabling the application of the acoustic emission for assessment of the technical condition of the pressure equipment working in the cryogenic conditions. The exploitation need from which the works originated was described. The main challenges connected with the application of the acoustic emission for the equipment working in the cryogenic conditions were indicated. The results of the conducted project were summarized, together with indicating the possible application and the requirements necessary to be taken into account... dalej

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