Graben Hydrocarbon Occurrences and Structural Style

Harding, T. P.

doi:10.1306/ad460a21-16f7-11d7-8645000102c1865d

Cited by 33 publications

(7 citation statements)

References 30 publications

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“…The Palaeocene interval is still doubtful in terms of the tectonic regime. Ahlbrandt (2001), Abadi (2002), El‐Hawat and Pawellek (2007), Abdunaser and McCaffrey (2014) and Ghanush (2018) interpreted the Palaeocene interval as a syn‐rift package, whereas Harding (1984), Baird et al (1996), van der Meer and Cloetingh (1993), El‐Hawat et al (1996), Gras and Thusu (1998), Ambrose (2000) and Hallett and Clark‐Lowes (2016) claim that the Mesozoic Sirte Basin rifting commenced in the Early Cretaceous, peaked in the Late Cretaceous and terminated in the Early Tertiary. In this study, the seismic data clearly shows that the post‐rift stage took place during the very late Cretaceous and continued into the Eocene.…”

Section: Geological Settingmentioning

confidence: 99%

Integrated geological data, 3D post‐stack seismic inversion, depositional modelling and geostatistical modelling towards a better prediction of reservoir property distribution for near‐field exploration: A case study from the eastern Sirt Basin, Libya

Khalifa,

Moncef,

Radwan

2023

Geological Journal

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De‐risking the hydrocarbon potential in near‐field exploration is one of the most important procedures in the exploration of hydrocarbons, and it requires the integration of various data to predict the reservoir characteristics of the prospect area more accurately. In this work, wells and 3D seismic data from the Libyan producing oil fields were utilized to demonstrate how well this technique worked to improve and describe the hydrocarbon potential of the carbonate geobody that corresponds to the Palaeocene Upper Sabil Formation, which was revealed by new seismic data. This study integrates different types of data, including 3D seismic, seismic acoustic impedance, depositional history and geostatistical analysis, to predict the facies, reservoir porosity and permeability distributions and then visualize them in a 3D reservoir model. The 3D seismic data analysis revealed the presence of a clear seismic anomaly geobody (GB) that has never been penetrated by any well. The sedimentological analysis for the well adjacent to the GB indicated a deep‐water depositional environment as turbidites surrounded by deep‐water mud dominated facies. The Upper Palaeocene interval in the study area was subdivided based on the depositional facies and seismic stratigraphy into eight zones that were used to build the reservoir model framework. According to the porosity permeability relationships, the carbonate facies has been classified into five E‐Facies, that is, soft highly argillaceous limestone, hard argillaceous limestone, porous limestone (<20% porosity, and >30% shale volume), medium quality limestone (10–20% porosity, and >30% shale volume) and tight limestone (<10% porosity, and >30% shale volume). The rock physics and inversion feasibility analysis indicated that the acoustic impedance (AI) can be used to predict the porosity but not the lithology or the fluid content. The Bayesian classification has shown excellent results in predicting and modelling the reservoir facies distribution within the study area, utilizing the integration of gross depositional maps (GDEs), wells and seismic data. The reservoir quality of the GB was predicted by using the post‐stack seismic inversion, which indicated a high porosity interval (25%–30%). Moreover, the statistical analysis integrated with the well and seismic data was used to predict the GB permeability. The predicted permeability was reasonably high (40–60 mD). The final E‐facies show an excellent match with the input well data and an excellent match with the blind wells that were used for result quality control (QC) with higher vertical resolution. The developed model can be used as a guide for de‐risking the studied GB hydrocarbon potential in the studied basin, and it can be applied in other similar geological conditions worldwide for exploring underexplored reservoirs and de‐risking their hydrocarbon potential.

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Section: Geological Settingmentioning

confidence: 99%

Integrated geological data, 3D post‐stack seismic inversion, depositional modelling and geostatistical modelling towards a better prediction of reservoir property distribution for near‐field exploration: A case study from the eastern Sirt Basin, Libya

Khalifa,

Moncef,

Radwan

2023

Geological Journal

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“…The cause of this basin is still controversial. It has been suggested that it may be related to a triple junction subjected to crustal thinning over a mantle hotspot (Harding, 1984; Van Houten, 1983) or to the development of the Central African Rift system (Guiraud & Maurin, 1992). Other researchers have proposed that it was formed by wrenching associated with the opening of the Tethys seaway following the break‐up of Pangea (Abdunaser & McCaffrey, 2015; Cavazza et al, 2004).…”

Section: Influence Of the Hercynian Orogeny On Post‐hercynian Basinsmentioning

confidence: 99%

Control of Hercynian Orogeny on basin evolution on the southern margin of the Tethyan region: A review and new insights

et al. 2023

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The Hercynian Orogeny was caused by the collision of Gondwana and Laurussia in the Mid‐/Late Carboniferous–Early Permian. This orogeny strongly influenced the pattern and evolution of basins and hydrocarbon accumulation on the southern margin of the Tethyan region (i.e., North Africa and the Middle East). Research on the Carboniferous–Early Permian Hercynian Orogeny is of great value in both plate tectonic reconstructions and hydrocarbon exploration. For its influence on basin evolution, some previous studies have considered the modification of the early Palaeozoic basins, but there has been less work on the evolution of the post‐Hercynian Mesozoic basins. We review the available data and re‐analyse the spatiotemporal impacts of this key tectonic event on the evolution of the basins in this region. The Carboniferous–Early Permian Hercynian Orogeny was an important turning point in basin evolution in North Africa and the Middle East. It interrupted the stability of the Gondwana platform and heralded a huge change in the pattern of basins from the uniform pre‐Hercynian Palaeozoic basins to the post‐Hercynian Mesozoic basins characterized by strong segmentation. The Carboniferous–Early Permian Hercynian Orogeny not only modified the pre‐Hercynian Palaeozoic basins but also controlled the distribution and evolution of the post‐Hercynian Mesozoic basins. Large‐scale uplifts were generated among the basins through modification of the inherited palaeohighs and five large NE‐trending arches were newly formed. These uplifts divided the early unified basin into multiple separate basins. Five large‐scale, almost equidistant, NE‐trending arches were generated on the northern margin of Gondwana (the Allala, Sirte, Levant, Al‐Batin and Oman arches), forming the present‐day Palaeozoic Basin pattern with an alternating distribution of uplifts and depressions. The northern part of the large, NE‐trending Hercynian arches collapsed as a result of the extensional stress caused by the opening of the Neotethys Ocean in the Late Permian–Triassic and formed Mesozoic basin depocenters (the Oued Mya–Pelagian basins, the Sirte Basin, the Eastern Mediterranean Basin and the Central Arabian Basin). These depocenters are important oil and gas enrichment zones. The NE‐trending Hercynian arches, the Mesozoic basin depocenters, the opening of the Neotethys Ocean and the segmentation of the basins by the Alpine Orogeny all show relatively consistent east–west‐directed segmentation on the northern margin of Gondwana. This shows that they may have a unified dynamic genetic background. The zone of structural weakness formed by the collision of multiple terranes during the Pan‐African Orogeny may have controlled this segmentation. The inheritance between reformation of the pre‐Hercynian Palaeozoic basins and influence on the post‐Hercynian Mesozoic basins by Carboniferous–Early Permian Hercynian Orogeny, is the result of the tectonics repetitively focused in pre‐existing weaker domains, under the lithospheric mantle modification in the polyphase assembly and break‐up of the supercontinent.

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“…Longitudinal folds are parallel to the associated normal fault, commonly forming as a result of the propagation of a fault tip into a monoclinal flexure. Such folds have been referred to as forced folds by Withjack et al (1990), fault-propagation folds by Mitra (1993), or drape folds by Stearns (1978) and Harding (1984). Transverse folds are also a result of displacement on normal faults, but they trend at right angles to the fault surface, although they may be elongated par allel to it.…”

Section: Extensional Folds and Their Kinematic Evolutionmentioning

confidence: 99%

“…The Caballo Mountain structures are particularly good examples of footwall anticlines, including transverse and longi tudinal types as well as a combination of both. Well known in the subsurface because of their importance as oil traps in the North Sea, Libya, and the Gulf of Suez (Harding, 1984;Withjack et al, 1990;Robson, 1971), the Caballo blocks offer fine examples of outcropping analogues. Details of the structures, such as the array of closely spaced antithetic faults on the western limb of Red House Mountain, whose subsurface analogs may not be imaged by seismic techniques or understood by drilling, may be observed in these outcrops.…”

Section: Extensional Folds and Their Kinematic Evolutionmentioning

confidence: 99%

Geology of the Caballo Mountains, New Mexico

Seager¹,

Mack²

2003

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The Caballo Mountains, just south of Truth or Consequences, rise to an elevation of 7,065 feet. Today they are flanked on the west side by Caballo Reservoir and on the east side by the Jornada del Muerto. An extraordinary geologic section is preserved here. Precambrian igneous and metamorphic rocks (granites and schists) provide a view of the Precambrian history of this part of the country, and an extraordinary thickness of sedimentary rocks (whose collective thickness is more than 3.5 miles) gives us an unparalleled picture of the evolution of southern New Mexico. Development of these mountains began with compression and uplift associated with the Laramide orogeny, at the end of the Mesozoic. Since then the complex geologic history of this part of New Mexico has included uplift, erosion, faulting, volcanic activity, continental deposition, and, finally, the development of the Rio Grande rift. That complex geologic history is well documented in this volume. This memoir is the result of many years of study and field work on the part of the authors, who have drawn together in one place this comprehensive description of the region. The volume is heavily illustrated with photographs, maps, stratigraphic sections, and other graphics. It contains both an index and a glossary.

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Graben Hydrocarbon Occurrences and Structural Style

Cited by 33 publications

References 30 publications

Integrated geological data, 3D post‐stack seismic inversion, depositional modelling and geostatistical modelling towards a better prediction of reservoir property distribution for near‐field exploration: A case study from the eastern Sirt Basin, Libya

Integrated geological data, 3D post‐stack seismic inversion, depositional modelling and geostatistical modelling towards a better prediction of reservoir property distribution for near‐field exploration: A case study from the eastern Sirt Basin, Libya

Control of Hercynian Orogeny on basin evolution on the southern margin of the Tethyan region: A review and new insights

Geology of the Caballo Mountains, New Mexico

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