FIELD: geophysics.
SUBSTANCE: method includes forming additional variable pressure on well walls, changing well diameter and analytical calculations used to detect unstable well ranges. In range of salt placement measurements of well diameter change are performed by profile measuring method in said range as a result of hydrodynamic effect on well walls by additional variable pressure, formed by drilling tool during hoisting operations, which are performed above salt placement range. First (background) measurement is performed before, and control one - after hydrodynamic effect, and ranges of salt displacement are detected on basis of value of shaft narrowing as difference of diameters of well shaft between first and control measurements.
EFFECT: higher precision and trustworthiness.
2 dwg
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