COMPARISON OF THE DEFORMATION ACTIVITY MODELS OF TENSILE FAULTS WITH THE RESULTS OF GEODYNAMIC MONITORING OF OIL AND GAS FACILITIES

Abstract

The purpose of this paper is to review the current models of deformation activity of tensile cracks and to compare them with each other. The paper describes a number of examples of fault zones activation in different regions at oil and gas facilities. All
of them are revealed by means of multiple repeated high-precision geodetic observations and manifested in the form of local quasi-symmetric subsidences with the same amplitude and width ratios. As a result of comparative analysis of the models, it has been concluded that a parametrically-induced model can be used as a mechanism for the formation of the observed spatial and temporal spectrum of modern displacements. Its practical application is reduced to solving the inverse problems of geodynamics. When using this model, formulas have been calculated for the distribution of horizontal displacements in the volumetric problem, as well as for the inclinations and relative deformations (formalized parameters) within the framework of the flat problem for the geodynamic test site of PJSC TATNEFT. The maximum values of vertical displacement gradients (inclinations) of the earth's surface have been calculated and it turned out that these zones have been confined to the hole deviations. It is concluded that the model used contributes to the solution of the extremely urgent problem of ensuring
industrial safety of oil and gas facilities on a geodynamic basis.