FIELD: physics.
SUBSTANCE: high-voltage X-ray generator is used to determine density and other characteristics of a formation surrounding a well. One version of the invention has a stable compact X-ray generator which can generate radiation with energy of 250 keV or higher, while working at temperatures equal to or higher than 125°C. In another version, radiation passes from the X-ray generator into the formation and reflected radiation is detected using a near detector and a far detector. Output signals of said detectors are then used to determine formation density. In another version, a reference radiation detector monitors a filtered radiation signal. The output signal of this detector is used to control at least one of the next parameters: acceleration voltage and beam current of the X-ray generator.
EFFECT: possibility of replacing radiochemical radiation sources, reduced size of the generator and possibility of generating radiation with sufficient energy for use when determining formation density.
21 cl, 16 dwg
