TY - JOUR AU - Hasan, Muhammad Luqman AU - M. Tóth, Tivadar TI - Fracture Density Prediction of Basement Metamorphic Rocks Using Gene Expression Programming JF - MINERALS J2 - MINERALS-BASEL VL - 14 PY - 2024 IS - 4 PG - 30 SN - 2075-163X DO - 10.3390/min14040366 UR - https://m2.mtmt.hu/api/publication/34763298 ID - 34763298 AB - Many methods have been developed to detect and predict the fracture properties of fractured rocks. The standard data sources for fracture evaluations are image logs and core samples. However, many wells do not have these data, especially for old wells. Furthermore, operating both methods can be costly, and, sometimes, the data gathered are of bad quality. Therefore, previous research attempted to evaluate fractures indirectly using the widely available conventional well-logs. Sedimentary rocks are widespread and have been studied in the literature. However, fractured reservoirs, like igneous and metamorphic rock bodies, may also be vital since they provide fluid migration pathways and can store some hydrocarbons. Hence, two fractured metamorphic rock bodies are studied in this study to evaluate any difference in fracture responses on well-log properties. Also, a quick and reliable prediction method is studied to predict fracture density (FD) in the case of the unavailability of image logs and core samples. Gene expression programming (GEP) was chosen for this study to predict FD, and ten conventional well-log data were used as input variables. The model produced by GEP was good, with R2 values at least above 0.84 for all studied wells, and the model was then applied to wells without image logs. Both selected metamorphic rocks showed similar results in which the significant parameters to predict FD were the spectral gamma ray, resistivity, and porosity logs. This study also proposed a validation method to ensure that the FD value predictions were consistent using discriminant function analysis. In conclusion, the GEP method is reliable and could be used for FD predictions for basement metamorphic rocks. LA - English DB - MTMT ER - TY - JOUR AU - Lange, Thomas Pieter AU - Palcsu, László AU - Szakács, Alexandru AU - Kővágó, Ákos AU - Gelencsér, Orsolya AU - Gál, Ágnes AU - Gyila, S. AU - M. Tóth, Tivadar AU - Mațenco, L. AU - Krézsek, C. AU - Lenkey, László AU - Szabó, Csaba AU - Kovács, István János TI - The link between lithospheric scale deformations and deep fluid emanations: Inferences from the Southeastern Carpathians, Romania JF - EVOLVING EARTH J2 - EVOLVING EARTH VL - 1 PY - 2023 PG - 15 SN - 2950-1172 DO - 10.1016/j.eve.2023.100013 UR - https://m2.mtmt.hu/api/publication/34222446 ID - 34222446 LA - English DB - MTMT ER - TY - CHAP AU - Hrabovszki, Ervin AU - Körmös, Sándor AU - Tóth, Emese AU - Steinbach, G AU - M. Tóth, Tivadar AU - Schubert, Félix ED - Raucsikné Varga, Andrea Beáta TI - Ásványos erek a Kantavári kőfejtőben T2 - 13. Kőzettani és Geokémiai Vándorgyűlés PB - Szegedi Tudományegyetem TTIK, Ásványtani, Geokémiai és Kőzettani Tanszék CY - Szekszárd SN - 9789633069615 PY - 2023 SP - 13 EP - 14 PG - 2 UR - https://m2.mtmt.hu/api/publication/34158367 ID - 34158367 LA - Hungarian DB - MTMT ER - TY - JOUR AU - M. Tóth, Tivadar TI - Elnöki megnyitó. elhangzott a MagyarhoniFöldtani Társulat (2023. 04. 26.) közgyűlésén TS - elhangzott a MagyarhoniFöldtani Társulat (2023. 04. 26.) közgyűlésén JF - FÖLDTANI KÖZLÖNY J2 - FÖLDTANI KÖZLÖNY VL - 153 PY - 2023 IS - 2 SP - 105 EP - 106 PG - 2 SN - 0015-542X UR - https://m2.mtmt.hu/api/publication/34112722 ID - 34112722 LA - Hungarian DB - MTMT ER - TY - CONF AU - Lange, Thomas Pieter AU - Palcsu, László AU - Szakács, Alexandru AU - Kővágó, Ákos AU - Gelencsér, Orsolya AU - Gál, Ágnes AU - Gyila, Sándor AU - M. Tóth, Tivadar AU - Matenco, Liviu AU - Krézsek, Csaba AU - Lenkey, László AU - Szabó, Csaba AU - Kovács, István János TI - The link between deep fluids and surface gas emanation in the Southeastern Carpathians T2 - 19th meeting of the Central European Tectonic Studies Group (CETeG) PY - 2023 SP - 53 PG - 1 UR - https://m2.mtmt.hu/api/publication/34014265 ID - 34014265 LA - English DB - MTMT ER - TY - CONF AU - Lange, Thomas Pieter AU - Paulik, Oszkár AU - Batizi, Zoltán AU - Felkerné Kóthay, Klára AU - Józsa, Sándor AU - M. Tóth, Tivadar TI - The geotouristical properties of Nagybörzsöny T2 - 53. Meeting of Young Geoscientists - Ifjú Szakemberek Ankétja PY - 2023 SP - 60 EP - 61 PG - 2 UR - https://m2.mtmt.hu/api/publication/34014211 ID - 34014211 LA - English DB - MTMT ER - TY - CONF AU - Lange, Thomas Pieter AU - Palcsu, László AU - Szakács, Alexandru AU - Kővágó, Ákos AU - Gelencsér, Orsolya AU - Gál, Ágnes AU - Gyila, Sándor AU - M. Tóth, Tivadar AU - Matenco, Liviu AU - Krézsek, Csaba AU - Lenkey, László AU - Szabó, Csaba AU - Kovács, István János TI - Deep CO2-rich gas emanation in the Southeastern Carpathians T2 - 53. Meeting of Young Geoscientists - Ifjú Szakemberek Ankétja PY - 2023 SP - 35 EP - 36 PG - 2 UR - https://m2.mtmt.hu/api/publication/34014190 ID - 34014190 LA - English DB - MTMT ER - TY - BOOK ED - Babinszki, Edit ED - Piros, Olga ED - Budai, Tamás ED - Gyalog, László ED - Halász, Amadé ED - Király, Edit ED - Koroknai, B ED - Haranginé Lukács, Réka ED - M. Tóth, Tivadar TI - Magyarország litosztratigráfiai egységeinek leírása I.. Prekainozoos képződmények TS - Prekainozoos képződmények PB - Szabályozott Tevékenységek Felügyeleti Hatósága CY - Budapest PY - 2023 SP - 275 SN - 9789636713263 UR - https://m2.mtmt.hu/api/publication/33825476 ID - 33825476 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Hasan, Muhammad Luqman AU - M. Tóth, Tivadar TI - Localization of potential migration pathways inside a fractured metamorphic hydrocarbon reservoir using well log evaluation (Mezősas field, Pannonian Basin) JF - GEOENERGY SCIENCE AND ENGINEERING J2 - GEOENERGY SCI ENG VL - 225 PY - 2023 PG - 22 SN - 2949-8929 DO - 10.1016/j.geoen.2023.211710 UR - https://m2.mtmt.hu/api/publication/33720723 ID - 33720723 N1 - Funding Agency and Grant Number: National Research, Development and Innovation Office, Hungary [K-138919] Funding text: Funding This study was supported by the National Research, Development and Innovation Office, Hungary (grant no. K-138919) . LA - English DB - MTMT ER - TY - JOUR AU - Tóth, Emese AU - Hrabovszki, Ervin AU - M. Tóth, Tivadar TI - Using geophysical log data to predict the fracture density in a claystone host rock for storing high-level nuclear waste JF - ACTA GEODAETICA ET GEOPHYSICA J2 - ACTA GEOD GEOPHYS VL - 58 PY - 2023 IS - 1 SP - 35 EP - 51 PG - 17 SN - 2213-5812 DO - 10.1007/s40328-023-00407-w UR - https://m2.mtmt.hu/api/publication/33698292 ID - 33698292 AB - Previously drilled boreholes of a host rock for a potential nuclear waste repository in Hungary revealed a highly fractured claystone rock body. A crucial step for characterizing the hydrodynamic behavior of such a fractured reservoir is fracture identification and accurate calculation of the fracture density. Although acoustic borehole televiewers provide a reliable base for determining the fracture density, older boreholes usually lack such data. However, conventional borehole geophysical measurements are often accessible in such cases. The aim of this study was to identify any correlations between well log data and fracture density. Multiple linear regression analysis was performed on data from two boreholes penetrating the Boda Claystone Formation in southwest Hungary. The upper section of the BAF-4 borehole was used for training, where the fracture density was estimated with a fit of R 2 = 0.767. The computed regression function predicted the fracture density with high accuracy in both boreholes for all intervals with typical lithological features. However, in some sections where anomalous well log data indicated changes in the lithology, the prediction accuracy decreased. For example, the function underestimated the fracture density in sandy intervals. LA - English DB - MTMT ER -