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Menshov O.,Taras Shevchenko National University | Kuderavets R.,Carpathian Branch of Subbotin Institute of Geophysics of the NAS of Ukraine | Chobotok I.,Carpathian Branch of Subbotin Institute of Geophysics of the NAS of Ukraine
EAGE Geoinformatics 2014 - 13th International Conference on Geoinformatics - Theoretical and Applied Aspects 2014 | Year: 2014

Existence of local magnetic anomalies with a few nT amplitudes upon oil and gas deposits proportionate with structure contours was approved in practice by magnetic measurements in different hydrocarbon structures and can be one of the searching criteria for hydrocarbon traps. Hydrocarbon migration and microseepage effect change composition of magnetic minerals including nearsurface areas and soils. The results of magnetic studies on Vizhomlya and Sudova-Vyshnya gas fields in the Ukrainian part of Carpathian Foredeep are shown. Specific features of structure of the local magnetic field and the magnetic susceptibility of soil are analyzed. The local magnetic anomalies with amplitude of 4-7 nT and a width of about 3 km were detected upon the investigated geological structures. Magnetic susceptibility investigations of soils on the Sudova-Vyshnya gas field showed close correlation with landscape changes. Soils are not very magnetic. The interpretation of the local magnetic and soil magnetic susceptibility anomalies upon hydrocarbon fields is a complex problem and needs further researching, including the integration of other geophysical methods in solving problems of petroleum geology. Copyright © (2014) by the European Association of Geoscientists & Engineers. All rights reserved. Source


Menshov O.,Taras Shevchenko National University | Kuderavets R.,Carpathian Branch of Subbotin Institute of Geophysics of the NAS of Ukraine | Vyzhva S.,Taras Shevchenko National University | Chobotok I.,Carpathian Branch of Subbotin Institute of Geophysics of the NAS of Ukraine | Pastushenko T.,Taras Shevchenko National University
Studia Geophysica et Geodaetica | Year: 2015

Magnetic measurements in a number of hydrocarbon structures suggest the existence of local magnetic anomalies with certain nT amplitude reflecting the structure contours of the oil and gas deposits, which could therefore be used as a criterion for identifying hydrocarbon traps. Hydrocarbon migration and the microseepage effect changing the composition of magnetic minerals and reaching as high as the near-surface areas and soils cause local magnetic anomalies and changes in the magnetic properties of soils. Magnetic studies on the Orchovychi oil and gas field, Carpathian Foredeep, Western Ukraine, revealed specific features of the local magnetic field and the magnetic properties of soil. A local magnetic anomaly with amplitude of 6-8 nT and a width of about 4 km was detected in the structure of the magnetic field within the Outer zone of the Carpathian Foredeep. The anomaly relates to hydrocarbon deposit areas with complex morphology. Magnetic susceptibility (MS) of soils in the Orhovychi oil and gas field showed a close correlation with landscape changes. Soils were found to show magnetic susceptibility anomalies in close proximity to productive hydrocarbon areas. © 2015, Institute of Geophysics of the ASCR, v.v.i. Source

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