GEOMAGNETIC FIELD TRANSFORMS AND THEIR INTERPRETATION AT EXPLORATION FOR HYDROCARBON FIELD IN THE SOUTHERN PART OF THE USTYURT REGION
Abetov A.E. Yessirkepova Sh.B. Curto Ma.J.
2021National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2021#6Issue 4506 - 14 pp.
The results of interpretation of aeromagnetic survey data in the southern part of the Ustyurt region in order to identify zones and areas of rocks heterogeneous in terms of magnetic properties are discussed in this article. An attempt has been made to tie up the depth and nature of the propagation of the magnetoactive layer with areas potentially productive for the detection of hydrocarbons accumulations (HC). With these purposes there were calculated such reduced-to-the-pole transforms of the anomalous magnetic field: Vertical and horizontal derivatives, analytic signal, tilt derivative (TDR) of this field, high-and low- frequency components, tracing of axes of magnetic anomalies ΔTa, and position of 3d modeling of Euler’s points. The occurrence of a network of faults indicates the abrupt changes in the sign and direction of ΔTa anomalies, the presence of linear zones of high values of the magnetic field gradient, displacements of anomalies in plan and rectilinear ledges in the relief. Three tectonic elements, the Central Ustyurt dislocation system, the Shakhtakhtin step, and the Assakeaudan depression are distinguished by the character of the transforms of the geomagnetic field, and, consequently, by the depth of occurrence and the scale of propagation of magnetic rocks. The Shakhpakhty step is first of all recommended for setting up exploration in order to study the geological structure and oil and gas potential in more detail by the method of geological analogies and taking into account the available geological and geophysical data.
Airborne magnetic survey , Euler points , Magnetic field transforms , Vertical and horizontal derivatives
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Kazakh National Research Technical University named after K. I. Satpayev, Almaty, Kazakhstan
University of Brasilia, Brasilia, Brazil
Kazakh National Research Technical University named after K. I. Satpayev
University of Brasilia
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