ENVIRONMENTAL CONTROL OF UNDERGROUND CHAMBERS downhole tools "SCANER-2000"
From quick and accurate determination of the size, shape and spatial position of the underground chambers of dissolution depends on effective management of salt production and rational use of mineral resources. The planned geophysical studies of wells cavities formed in the rock salt deposits, avoid accidents associated with the collapse and subsidence. Downhole ultrasound device LAC "SCANER-2000" refers to the equipment of the acoustic monitoring wells and for the study of the well - the size and shape of the chamber formed in the well of salt mining. The principle of operation of the device - ultrasound location.
Technical data: the maximum measured distance (the radius of the conditional) to 120m with an accuracy of ± 0.33m; azimuthal orientation error of ± 3 °; permissible external hydrostatic pressure up to 28 MPa, working medium - the brine having a temperature of from 0 ° C to + 85 ° C; dimensions - diameter of 76mm, length 970 mm; Downhole tool head standard - GOST 14213-89 GZB3-60 is operated together with the logging lift. Register, processing and visualization (volume) measurements performed using a personal computer.
Registration results echolocation performed in real time at the time of study wells using standard PC interface (USB- or COM-port). Pretreatment of research results include hole intelligent algorithms filter out signal interference and multiply reflected waves additions missed measurements, smoothing and trimming circuit section based on a priori information expert - surveyor. Program data obtained in the study of the well section calculates the basic parameters: area, maximum and minimum radii, offset cross sections, the coefficient of variation from the ideal shape of the section, which allows to assess the degree of anisotropy of the process of erosion. The program provides tools 2-D and 3-dimensional visualization, comparison of cross sections of different levels and different stages of erosion.
"NPO POISK" conducting a study of wells by acoustic logging. Major work on the definition of caliper, size, shape and spatial position of underground chambers using a downhole acoustic locator SCANER-2000 on solezavodah and rassolopromyslah, as well as the operation, repair and construction of underground gas storage (UGS)