METHOD TO DEFINE THREE COMPONENTS OF EARTH SURFACE DISPLACEMENT VECTOR AT OIL AND GAS FIELD EXPLORATION

摘要

FIELD: instrumentation.;SUBSTANCE: invention relates to surveying and geodetic monitoring and can be used to ensure safety of oil and gas field exploration. As per the proposed method the geodetic measurements are carried out in the examined area and displacements N_geod of geodetic becnhmarks to the north $U_i^n,\mathop{\mathrm{image}}$ east $U_i^e\mathop{\mathrm{image}}$ and vertically $U_i^v\mathop{\mathrm{image}}$ (i=1, 2,…, N_geod) are determined. For the same time interval the displacements N_sat of steadily reflecting grounds in direction of a satellite $U_j^{LOS}\mathop{\mathrm{image}}$ (j=1, 2,…, N_sat) are determined with the help of radar satellite interferometry. Afterwards the explored field is divided into K elementary volumes. The following is calculated: the displacements in the point of the j steadily reflecting ground in the direction of a satellite $V_{j,k}^{LOS}\mathop{\mathrm{image}}$ which are resulting from the increase of pressure on a unit in the k elementary volume, and displacements in the point of i geodetic benchmark respectively to the north, east and vertically $V_{i,k}^n,\mathop{\mathrm{image}}$$V_{i,k}^e,\mathop{\mathrm{image}}$$V_{i,k}^v,\mathop{\mathrm{image}}$ which are resulting from the increase of pressure on a unit in the k elementary volume. Pressure difference ΔP_k is defined in each volume. Afterwards three components of earth surface displacement vector are determined.;EFFECT: higher accuracy of determination of earth surface displacement.;4 dwg