FIELD: metrology.
SUBSTANCE: invention relates to the field of metrological support of downhole geophysical equipment and can be used to calibrate downhole equipment, intended for the study of anisotropic near-wellbore space, the identification and geometrization of geological boundaries that do not intersect the borehole. Device for calibrating a downhole probing device includes a housing in which a tube of radio transparent material is placed, simulating a wellbore, made with the possibility of moving in it the body of the receiving and transmitting unit of the downhole sensing device. In the first embodiment, the hull is filled with materials simulating geological rocks, which are buried in the hull in several layers, which can be located at different angles to the well, including without intersecting it. According to the second variant, the device contains reflecting boundaries made of a material having a reflection coefficient of ultrashort electromagnetic pulses characteristic of real geological boundaries. Reflective boundaries are smooth and/or rough and fixed movably. Device according to the third embodiment contains cell sheets with cells installed in the housing. Fluid filling the cells allows simulating the electromagnetic properties typical of real geological media, as well as their heterogeneity and anisotropy.
EFFECT: technical result – providing the possibility of calibration of downhole tools designed to highlight geological boundaries that do not intersect the wellbore, including modeling the propagation of ultrashort electromagnetic pulses in a variety of possible geological situations.
4 cl, 3 dwg
