north-east khorasan is one of the most active regions in the world because of is setting on the alpine-himalayan belt. historical and geological backgrounds suggest that this region has experienced many destructive earthquakes throughout history. compared with the historical background, the seismicity of the region, in the present century, is better known both from the macroseismic and instrume...

Seismic data are considered crucial sources of that help identify the litho-fluid facies distributions in reservoir rocks. However, different mostly have similar responses to seismic attributes. In addition, anisotropy negatively affects predictors extracted from data. Accordingly, this study aims at estimating zero-offset acoustic and shear impedances based on partial-stack inversion by two me...

The mapping of faults provides essential information on many aspects seismic exploration, characterisation reservoirs for compartmentalisation and cap-rock integrity. However, manual interpretation from data is time-consuming challenging due to limited resolution noise. In this study, we apply a convolutional neural network trained synthetic with planar fault shapes improve in the Lower Upper C...

Channel sand acts as stratigraphic trap for hydrocarbon accumulation in many parts of the world. Delineation of this type of reservoir is crucial as channel sand may be scarce and inaccurate location of the drilling wells could lose a huge currency. To differentiate channel sand from the host rocks, attributes such as P and S wave velocity ratio plays a vital role in the study area. The velocit...

[1] We determine the geometry and geographic distribution of a very low velocity province (VLVP) at the base of the Earth’s mantle beneath the South Atlantic and Indian Oceans, based on waveform modeling and travel time analysis of seismic data recorded in Africa. Our data sets consist of SH, ScS, SHdiff, SKS, and SKKS phases recorded at two temporary broadband PASSCAL seismic arrays in Africa,...

The earthquake nucleation process has been vigorously investigated based on geophysical observations, laboratory experiments, and theoretical studies; however, a general consensus has yet to be achieved. Here, we studied nucleation process for the 2014 Iquique, Chile Mw 8.2 megathrust earthquake located within the current North Chile seismic gap, by analyzing a long-term earthquake catalog cons...

growing environmental and social concerns, both on the part of decision makers and public opinion, have brought a new perspective to the perception of hazard assessments a valid alternative in the long-term, and an effective complement in short and medium terms, to traditional design procedure for a resistant and safe environment. results of the gradual development of research on the probabilis...

Abstract The well-known, traditional way to extend P-wave acoustic impedance data between and beyond the well log locations is post-stack inversion of seismic usually available in surroundings boreholes. A relatively new trend exploration based on pre-stack CDP gathers providing both P- S-wave sections (and volumes), as estimated density data. This methodology often called simultaneous model-ba...

one of the common problems in reflective seismic records is the existence of coherent linear and random noises which cause covering of the most important parts of reflective signals; therefore, it is necessary to attenuate them by processing methods. several processing techniques have been devised for attenuation of coherent linear noises and linear radon or ?-? transform is a powerful techniqu...