Evaluation of the trends of secondary and tertiary hydrocarbon migration processes based on oil density–reservoir depths relationship in Hungary

Kovács, Zsolt; Zilahi-Sebess, László

doi:10.1556/24.61.2018.02

Cited by 2 publications

(3 citation statements)

References 6 publications

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“…The figures also show the position of the most essential, large-scale structures that define block boundaries inside the basement. Previous studies proved that these structures are responsible for the fluid migration inside the reservoir [44,47]. The existence of these structures explains the accumulation of hydrocarbon in the fractured AG body.…”

Section: Geological Settingmentioning

confidence: 90%

“…Based on the evidence of previous studies [41,42,45,46], several sections of the basement act as a buried hill fractured fluid reservoir, which not only acts as a conduit, but also stores a significant amount of hydrocarbon. The studied area is Mezősas field, where numerous wells have penetrated the fractured crystalline basement and produced hydrocarbon [47,48].…”

Section: Geological Settingmentioning

confidence: 99%

“…Due to the ongoing subsidence, these highs became buried 1-5 km beneath the present surface. These buried hills have been the leading interest for decades since they are highly fractured and active for hydrocarbon exploration and production [46,47,50].…”

Section: Geological Settingmentioning

confidence: 99%

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Fracture Density Prediction of Basement Metamorphic Rocks Using Gene Expression Programming

Hasan,

Tóth

2024

Minerals

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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.

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Section: Geological Settingmentioning

confidence: 90%

Section: Geological Settingmentioning

confidence: 99%

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Fracture Density Prediction of Basement Metamorphic Rocks Using Gene Expression Programming

Hasan,

Tóth

2024

Minerals

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Source rocks and petroleum systems of the Hungarian Pannonian Basin

Badics,

Vető,

Sajgó

et al. 2024

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In this study our primary objectives were to describe and assess the potential source rocks in Hungary, focusing on parameters such as lateral extent, thickness, and organic richness. We investigated the burial and thermal evolution and timing of petroleum generation. Utilizing a substantial database of 1400 vitrinite reflectance and 6500 TOC/Rock-Eval data, we performed quantitative assessment of source rock potential per basin. A 93,000 km 2 3D basin model covering entire Hungary was created. In the Zala North Basin, the Upper Triassic Kössen Marl is the main source rock, charging the Nagylengyel oil fields. Lower-Middle Jurassic sediments in the Mecsek Unit were identified as fair quality gas-prone source rocks, potentially charging the nitrogen-rich gas fields in the Szolnok Flysch Zone. In the Paleogene Basin, the Lower Oligocene Tard Clay is the best source rock, with additional potential in the Upper Eocene Kosd Fm. and Buda Marl. The Badenian marine shales are the likely source rocks in the Zala South and the Dráva Basin and in the Somogy Trough. In the Kiskunság area, Karpatian lacustrine, Badenian marine and lower Pannonian Endrőd Marl source rocks charged the known fields, similarly to the Pusztaföldvár High, Békés Basin and in the Derecske Trough.

show abstract

Evaluation of the trends of secondary and tertiary hydrocarbon migration processes based on oil density–reservoir depths relationship in Hungary

Cited by 2 publications

References 6 publications

Fracture Density Prediction of Basement Metamorphic Rocks Using Gene Expression Programming

Fracture Density Prediction of Basement Metamorphic Rocks Using Gene Expression Programming

Source rocks and petroleum systems of the Hungarian Pannonian Basin

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