Abstract
A seismic study was conducted to re-interpret the Qasab and Jawan oil field in northern Iraq, south of the city of Mosul, by reprocessing and interpreting many seismic sections of a number of field surveys that included the field area. Two reflectors are detected, represented by Hartha Formations which were deposited during the Cretaceous age and Euphrates Formation which was deposited during the Tertiary age in order to stabilize the structural image of this field. The study was achieved by reinterpreting seismic sections using the Petrel program, where time, velocity and depth maps were prepared for the two formations.
 The study showed that the Qasab and Jawan fields generally consist of a structural closure located at the wells of the northern dome. This closure extends to the south east and deviates towards the east in the form of a structural rift. The study concluded the existence of a transverse fault that cuts Qasab and Jawan structures, forming a structural trap that represents the southern part of Qasab structure.
Highlights
The study of geophysical history of accumulations of hydrocarbons returns to the beginning of the last century and seismic analyses of the reflexes were used to detect these accumulations [1]
Many seismic studies were conducted to investigate the subsurface geology of many oilfields in Iraq. Those studied concluded that the seismic reflection method provides a good image of the stratigraphy and structure of the subsurface, which leads to understanding the subsurface geology and provide a good evidence of oil accumulation [4,5,6,7,8,9]
Time, velocity and depth maps were created for the study area to be iterpreteted
Summary
The study of geophysical history of accumulations of hydrocarbons returns to the beginning of the last century and seismic analyses of the reflexes were used to detect these accumulations [1]. The task of seismic analysis in oil studies is to provide a most accurate picture of the surface of the earth and its geological structures in order to determine the seismic portion, velocity and time outline, as well as seismic stratigraphy and seismic facies in terms of intra-stratigraphic interpretations [3]. Many seismic studies were conducted to investigate the subsurface geology of many oilfields in Iraq. Those studied concluded that the seismic reflection method provides a good image of the stratigraphy and structure of the subsurface, which leads to understanding the subsurface geology and provide a good evidence of oil accumulation [4,5,6,7,8,9].
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