Abstract: A logging device and method for locating a watered zone in a horizontal well with high watercut problem by isotope labeling is provided. The method successively includes the following operations: a. solidifying an isotope used in an isotope releasing device into a water-soluble carrier; b. connecting the isotope releasing device with a tubing and setting them to a horizontal segment of the well; c. dissolving the water-soluble carriers in the water at the bottom of the well to release the isotope, wherein the releasing rate is proportional to the flow rate of the water; d. starting a lift-up pump and beginning a production logging; and e. continuously performing ?-ray energy-spectrum analysis on produced water on the ground, so as to locate the watered zone of the horizontal well by the detected species and characteristic content of the isotope, thereby reduces operation risk, saves platform occupying time and logging cost.

Abstract: An air kerma conventional true value determining method is provided, which addresses the problem of on-site and in-situ verification or calibration of radiation protection with existing standard reference radiation, which is large in spatial volume and unable or difficult to be moved. The method includes establishing a minitype reference radiation, selecting a proper radiation source and source intensity for providing incident rays for a shielding box, selecting a plurality of gamma ray dosimeters as samples for training a prediction model to obtain the prediction model of the air kerma conventional true value of a point of test, putting a probe of a dosimeter being verified at the point of test, recording scattering gamma spectrum measured by a gamma spectrometer, with the spectrum applied as input to the prediction model to obtain the air kerma conventional true value. The results are accurate and the reference radiation is small in size.

Abstract: A measurement method for an air kerma conventional true value comprises: building a small-scale reference radiation field, then selecting a proper radiation source (4) and a source intensity for providing incident rays for a shielding box (1), subsequently selecting a plurality of gamma ray dose measurement instruments as experiment samples for building a prediction model to obtain a prediction model of the air kerma conventional true value of a check point, fmally placing a probe of an instrument to be detected on the check point (6), recording a scattering gamma spectrum detected by a gamma-ray spectrometer (9), and importing the prediction model to obtain the air kerma conventional true value. The method relates to the field of radiation protection detection or calibration, and has the beneficial effects that the result is accurate, the reference radiation field used is small in size, and the method is applied to measurement of the air kerma conventional true value.

Abstract: An logging method for locating a watered zone in a horizontal well with high watercut problem by isotope labeling is disclosed, which successively includes the following steps: a. solidifying an isotope used in an isotope releasing device into a water-soluble carrier; b. connecting the isotope releasing device with a tubing and setting them to a horizontal segment of the well; c. dissolving the water-soluble carriers in the water at the bottom of the well to release the isotope, wherein the releasing rate is proportional to the flow rate of the water; d. starting a lift-up pump and beginning a production logging; and e. continuously performing y-ray energy-spectrum analysis on produced water on the ground, so as to locate the watered zone of the horizontal well with high watercut problem by the detected species and characteristic content of the isotope.

Abstract: The present invention relates to the method and equipment for inspecting nuclear experimental locales, and particularly relates to the method and system for separating and measuring 37Ar quickly. The method of the invention comprises the steps of sampling, eliminating impurities, separating, purifying, measuring the sum of Ar, collecting Ar, measuring the activity of 37Ar, etc. The control unit in the system of the invention connects respectively to a sampling unit, a separating-purifying unit, and a radioactivity measuring unit which are connected in turn, and a computer and the software of the control unit are in charge of the automatic operation, measurement and data-collection of the whole system. The method and system for quickly separating and measuring 37Ar of the patent can meet the requirements of locales inspection for Comprehensive Test Ban Treaty (CTBT), the sensitivity of measuring 37Ar is high, so do the production and purity of Ar.