Science and technological developments: article

RESULTS OF GEODYNAMIC OBSERVATIONS AT ZHANAZHOL DEPOSIT, KAZAKHSTAN
KUZMIN YURII OLEGOVICH1
NIKONOV ALEKSANDR IVANOVICH2
1 Schmidt Institute of Physics of the Earth RAS, Russia, 123242, Moscow, Bolshaya Gruzinskaya str. 10, bld. 1 2 Oil and Gas Research Institute RAS, Russia, 119333, Moscow, Gubkin str. 3
Journal: Science and technological developments
Tome: 100
Number: 4
Year: 2021
Pages: 25-43
UDK: 550.83+622.27
DOI: 10.21455/std2021.4-3
Keywords: GEODYNAMIC MONITORING, LEVELING, SATELLITE MEASUREMENTS, VARIATIONS IN GRAVITY, FAULT ZONES, SUBSIDENCE OF THE EARTH'S SURFACE, VERTICAL AND HORIZONTAL DISPLACEMENTS OF THE EARTH'S SURFACE
Аnnotation: Repeated geodetic (ground and satellite) and gravimetric observations were carried out at the geodynamic test site at the Zhanazhol field (Kazakhstan) in the period 2010-2013. The analysis of the results of leveling observations was carried out and local anomalies of vertical displacements of the Earth's surface in the fault zones were revealed. Comparison of the results of ground-based and satellite geodetic observations showed that the distribution of vertical displacements of the Earth's surface obtained from GNSS measurements are in sharp contradiction with the re-leveling data. A paradoxical discrepancy between the ratio of vertical and horizontal displacements of the Earth's surface throughout the entire territory of the field has been established. It is shown that in the areas of maximum uplift or subsidence of the surface, intense horizontal displacements are observed, which contradicts the laws of geomechanics for deep objects with volumetric deformation. In these areas, horizontal displacements should have zero or minimum horizontal motion amplitude. The results of repeated leveling and gravimetric observations are compared. A regular relationship of local subsidence of the Earth's surface in fault zones with variations in the gravitational field has been revealed. A correspondence has been established between the sign of the displacements of the earth's surface (subsidence, uplift) and the features of the field development. It is proposed to use geodynamic monitoring as a method of additional control of field development processes.