Application of optimum offset shallow seismic reflection technique In the area of west el fashn, egypt

Abstract

A shallow optimum offset reflection survey was performed in El Fashn area. The purpose of this survey was to determine the continuity of the subsurface boundary conditions The optimum offset shallow seismic reflection technique was used to collect approximately 350 m of data with a geophone spacing of 3 m. The data were recorded on 12 channel engineering seismongraph using signal 100 Hz geophone per channel and 300 Hz high pass filter on seismograph. Velocity analysis provided the information necessary to convert arrival time to depth estimates. The seismic section clearly delineate the contact between the different rock units identified from the borhole data. Some boundaries, which cannot be interprated from refraction work, are clearly recorded on the reflection section. Also, regional geologic information, seismic and borehole data are combined to indicate the continuity of the geologic contact present within the overburden beneath the