METHOD FOR AZIMUTH NUCLEAR-MAGNETIC RESONANCE VISUALIZATION OF ROCK PROPERTIES FROM A WELL HOLE

摘要

FIELD: examination of well-adjacent space using nuclear-magnetic resonance method. ^ SUBSTANCE: in accordance to the invention, in examination zone a constant magnetic field is created and series of radio impulses is examined. The series of radio-impulses in examination zones creates a radio-frequency magnetic field with strength which alternates in space. Duration of radio-impulses matches zeroes of zero order Bessel function of first type. Signals of nuclear-magnetic resonance of fading of free induction of spin echo are inverted with production of spin density as a function of field strength. Then aforementioned inversion is reflected into position with usage of known character of radio-frequency field alternation. ^ EFFECT: possible production of spin density images based on azimuth angles. ^ 4 cl, 7 dwg