The resultant maps were overlaid and compared with the plotted RTE residual maps for relevant interpretations. The reduced-to-equator (RTE) residual aeromagnetic data used were enhanced using the total horizontal derivative (THD) and upward continuation (UC) filtering techniques on Oasis Montaj 6.4.2 (HJ) software.
High-resolution aeromagnetic data along the Lagos–Ore axis are processed for fault mapping in the study area. To provide a geophysical explanation to this phenomenon, the high-resolution aeromagnetic data of the sedimentary terrain and part of the Basement Complex of Southwestern Nigeria were processed and interpreted to provide fault architecture of the area, which could serve as conduit for the passage of seismic energy in the study area. The passage of this wave along the fault plane or within the lithosphere could result in ground shaking or vibration at the surface of the Earth. It was inferred that despite the three horizons are supported by sealing fault zone, leakage still occurs at shallow sand horizon which correspond to a moderately sealed plane from SGR.Ī seismic wave is released when there is sudden displacement on a fault plane. The hydrocarbon column height model reveals a column height of 120m supports the shallow sand horizon while column heights È 180m support the mid and deep sand horizons respectively. The estimated shale gouge ratio of the fault on the analyzed trap reveals that the shallow sand horizon is supported by moderate sealing plane while that of mid and deep sand horizons are supported by proper sealing fault plane. The fault-horizon’s intersection (throw) model reveals that the horizons were not too deviated from where the maximum fault’s displacement was noticed. The volume of shale model shows the presence of shale and sandstone formations in the fault plane. Three reservoirs were mapped on the field while the fault supporting the identified trap was analyzed via throw, shale volume, shale gouge ratio, and hydrocarbon column heights attributes. The aim of the study is achieved using three dimensional seismic and well log data. Analysis of trap is therefore carried out with the aim to reduce the uncertainties associated with hydrocarbon exploration and exploitation in Niger-Delta using “Covenant” field as a case study. These faults may be sealing or act as conduit to fluid flow. For volumetric analysis of a field to be meaningful, it is essential to analyze the faults contributing to the accumulation of hydrocarbons in a trap. Important role in creation of hydrocarbon traps. The tendency to identify leaking zones is essential tool in trap assessment. Of the oceanic ridges, the results of the present analysis indicate that the Mid-Atlantic Ridge is the most active tsunamigenic zone, while of all the oceanic trenches, the Japan Trench is the most active. The present analysis of the Gutenberg-Richter relation of the 'a' and 'b' parameters indicates that tsunamigenic earthquakes do not occur frequently along the Aleutian Trench, although the historic record supports that destructive tsunamis have occurred along this region in the past. The weighted sum of earthquake energy released and of the Gutenberg-Richter relation parameters were evaluated to identify tsunamigenic earthquake zones along these locations. The present analysis was undertaken in order to better identify tsunamigenic zones near oceanic ridges and trenches in the Mid-Atlantic, in the Pacific, in Chile, in Japan, near the Aleutians and along the Peru-Chile trench. Not all regions of oceanic ridges and trenches are tsunamigenic earthquake zones, but knowledge of the weighted sum of released earthquake energy and of the Gutenberg-Richter relation of the 'a' and 'b' parameters are needed to better identify them as to their potential for tsunami generation. Tsunamigenic earthquakes have been known for their near and far field catastrophic impacts on coastal areas near oceanic ridges and trenches, as well as near tectonic faults in closed and semi-enclosed seas.
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