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 - 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 - Zeng, Zhouqiang AU - Shan, Xuanlong AU - Hao, Guoli AU - He, Wentong AU - Zheng, Changqing AU - Yi, Jian AU - Guo, Jiannan TI - Semiquantitative microscopic pore characterizations of the metamorphic rock reservoir in the central paleo-uplift belt, Songliao Basin JF - SCIENTIFIC REPORTS J2 - SCI REP VL - 12 PY - 2022 IS - 1 PG - 17 SN - 2045-2322 DO - 10.1038/s41598-022-05960-y UR - https://m2.mtmt.hu/api/publication/32983183 ID - 32983183 AB - Currently, metamorphic rock is a common target for natural gas exploration, and reservoirs are the key factors restricting natural gas exploration and development in metamorphic rocks. The deep metamorphic rock gas reservoir in the central paleo-uplift of the northern Songliao Basin has good exploration and development potential. In this study, we use a combination of qualitative descriptions and quantitative analysis to comprehensively analyze the pore characteristics of the reservoir and explore the factors controlling the pore characteristics of the metamorphic rock reservoir in the central paleo-uplift belt of the Songliao Basin. The metamorphic rock reservoir in the central paleo-uplift belt contains three types of lithologies: chlorite schist, mica schist and mylonite, each with different protoliths and metamorphic histories. The results of high-pressure mercury intrusion and nitrogen adsorption indicate that the pore size distributions of the schist and mylonite differ. Compared with the mylonite, the schist has larger reservoir space, more heterogeneity, smaller pore size, larger specific surface area and larger adsorbed gas storage capacity. This paper also studies the formation process of the reservoir and divides it into four stages. Finally, this article discusses in detail the factors controlling the microscopic pore characteristics of metamorphic rock reservoirs in the central paleo-uplift belt; the metamorphic rock protolith is the most important controlling factor. LA - English DB - MTMT ER - TY - GEN AU - Zhouqiang, Zeng AU - Xuanlong, Shan AU - Guoli, Hao AU - Wentong, He AU - Changqing, Zheng AU - Jian, Yi AU - Jiannan, Guo TI - Semiquantitative Characterizations And Controlling Factors of Microscopic Pore Characteristics of The Metamorphic Rock Reservoir In The Central Paleo-Uplift Belt, Songliao Basin PY - 2021 UR - https://m2.mtmt.hu/api/publication/32389153 ID - 32389153 LA - English DB - MTMT ER - TY - JOUR AU - Han, Changcheng AU - Tian, Jijun AU - Hu, Chenlin AU - Liu, Hailei AU - Wang, Wenfeng AU - Huan, Zhipeng AU - Feng, Shuo TI - Lithofacies characteristics and their controlling effects on reservoirs in buried hills of metamorphic rocks: A case study of late Paleozoic units in the Aryskum depression, South Turgay Basin, Kazakhstan JF - JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING J2 - J PETROL SCI ENG VL - 191 PY - 2020 PG - 18 SN - 0920-4105 DO - 10.1016/j.petrol.2020.107137 UR - https://m2.mtmt.hu/api/publication/31453490 ID - 31453490 N1 - College of Geology and Mining Engineering, Xinjiang University, Urumqi, 830046, China Shandong Key Laboratory of Depositional Mineralization & Sedimentary Mineral, Shandong University of Science and Technology, Qingdao, Shandong 266590, China College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China Research Institute of Exploration and Development, Xinjiang Oilfield Company, Karamay, 834000, China Exploration Division of PetroChina Tarim Oilfield Company, Xinjiang, Korla, 841000, China Cited By :2 Export Date: 18 April 2021 Correspondence Address: Tian, J.; College of Geology and Mining Engineering, China; email: tianxju@yahoo.com Funding details: 41972176, U1903207 Funding details: XJEDU 2019Y011 Funding details: DMSM20190021 Funding details: PetroChina Company Limited, PetroChina Funding text 1: The authors gratefully acknowledge the financial support received from the China National Science Fund (Grant Nos. 41972176 and U1903207 ), the Scientific Research Projects in Universities in Xinjiang Autonomous Region (Grant No. XJEDU 2019Y011 ), and the Shandong Key Laboratory of Depositional Mineralization & Sedimentary Mineral Open Fund (Grant No. DMSM20190021 ). We are grateful to the anonymous reviewers for their insightful and constructive comments for improving the manuscript. We also thank the Xinjiang Oil Field, PetroChina, for providing data. Funding text 2: The authors gratefully acknowledge the financial support received from the China National Science Fund (Grant Nos. 41972176 and U1903207), the Scientific Research Projects in Universities in Xinjiang Autonomous Region (Grant No. XJEDU 2019Y011), and the Shandong Key Laboratory of Depositional Mineralization & Sedimentary Mineral Open Fund (Grant No. DMSM20190021). We are grateful to the anonymous reviewers for their insightful and constructive comments for improving the manuscript. We also thank the Xinjiang Oil Field, PetroChina, for providing data. AB - Metamorphic rock reservoirs are special reservoirs that are quite different from traditional sedimentary rock reservoirs and contain rich hydrocarbon reserves. However, their lithofacies characteristics and reservoir properties are relatively underexplored, and the key factor in reservoirs is lithofacies. Based on core samples, thin sections, whole-rock analysis and well-log and seismic data, we evaluated the lithologies, petrological characteristics and reservoir properties of metamorphic rocks and then explored the main factors controlling reservoir formation and metamorphic rock quality in the Aryskum depression, South Turgay Basin, Kazakhstan. In this area, four types of lithofacies are identified: granitic gneiss (high DEN and CN, low GR), leptite (high GR and CN), gabbro (low GR and CN) and granite (high GR and low CN); among these rocks, granitic gneiss is widely distributed. The reservoir spaces of metamorphic rocks are divided into fractures and pores produced via metamorphism and structural movements. Fractures can be subdivided into structural fractures (SFs), dissolution fractures (DFs), cleavage microfissures (CMfs) and microfissures (Mfs), and pores include dissolved intergranular pores (DInterPs), dissolved intragranular pores (DIntrPs) and vugs (Vgs). Numerous SFs and DFs provide the main reservoir spaces for hydrocarbons. The reservoir quality of metamorphic rocks is primarily controlled by faults, fractures, lithofacies, minerals, dissolution and paleogeomorphology. Lithofacies and minerals are the internal factors that control dissolution and fragmentation, while paleogeomorphology and faults are the external factors that control fracture development. Leptite and granitic gneiss are high-quality reservoir lithofacies, and high paleogeomorphology areas and fault zones are the optimal locations for fractures and pores. Reservoir spaces undergo a series of repeated changes from formation to development, filling and reformation, and a comprehensive reservoir evolution model is proposed to illustrate the distribution of high-quality reservoirs. This study has scientific significance for investigating the reservoir-forming mechanisms of metamorphic rocks and practical applications for exploring and developing oil and gas fields in areas with metamorphic rocks. LA - English DB - MTMT ER - TY - JOUR AU - Jerzy, Cieślik TI - Dilatancy as a measure of fracturing development in the process of rock damage JF - OPEN GEOSCIENCES J2 - OPEN GEOSCI VL - 10 PY - 2018 IS - 1 SP - 484 EP - 490 PG - 7 SN - 2391-5447 DO - 10.1515/geo-2018-0038 UR - https://m2.mtmt.hu/api/publication/27669308 ID - 27669308 LA - English DB - MTMT ER - TY - JOUR AU - Dahooei, Ahmad Heidari AU - Afzal, Peyman AU - Lotfi, Mohammad AU - Jafarirad, Alireza TI - Identification of mineralized zones in the Zardu area, Kushk SEDEX deposit (Central Iran), based on geological and multifractal modeling JF - OPEN GEOSCIENCES J2 - OPEN GEOSCI VL - 8 PY - 2016 IS - 1 SP - 143 EP - 153 PG - 11 SN - 2391-5447 DO - 10.1515/geo-2016-0014 UR - https://m2.mtmt.hu/api/publication/25486536 ID - 25486536 LA - English DB - MTMT ER - TY - JOUR AU - Skultéti, Ágnes AU - M. Tóth, Tivadar TI - Localisation of ductile and brittle shear zones along the Szentlőrinc-1 well in the Mecsekalja Zone using quartz microstructural and well-log data JF - ACTA GEODAETICA ET GEOPHYSICA J2 - ACTA GEOD GEOPHYS VL - 51 PY - 2016 IS - 2 SP - 295 EP - 314 PG - 20 SN - 2213-5812 DO - 10.1007/s40328-015-0127-3 UR - https://m2.mtmt.hu/api/publication/2949640 ID - 2949640 N1 - Cited By :2 Export Date: 12 February 2021 Correspondence Address: Skultéti, Á.; Department of Mineralogy Geochemistry and Petrology, Hungary; email: skulteti.agi@gmail.com Cited By :2 Export Date: 18 April 2021 Correspondence Address: Skultéti, Á.; Department of Mineralogy Geochemistry and Petrology, Hungary; email: skulteti.agi@gmail.com LA - English DB - MTMT ER -