Wyniki unifikacji badań radiometrycznych wykonanych w otworach wiertniczych niecki mogileńskiej

Abstract

RESULTS OF UNIFICATION OF RADIOMETRIC RESEARCH MADE IN BORE HOLES WITHIN THE MOGILNO TROUGH

Summary

Determination of reservoir rock properties (clay content, porosity) using data of bore hole radiometry is now applied as orientation and indication method only, mainly due to a lack in the unification of radiometric devices. Numerous results of the radiometric investigations made in the recent years, may, owing to their significance, be used in quantitative interpretation but, on account of the standardization and, in consequence of this, of the parallelization of the results – they cannot be applied completely. In his works the present author has introduced some parameters allowing the previous radiometric investigations to be unified by means of the statistical elaboration of their results. It has been demonstrated that in the ease of the ascertained stability of radiometric features of the selected key beds, a linear transposition of the measurement scales of the individual bore holes into a selected standard scale seems to be possible.
Based on the stable horizons found in the Mogilno trough, proved already in the previous studies, the author has unified the measurement scale of gamma and neutron-gamma loggings fm this region by means of linear regression. Considerably high correlation coefficients were obtained, from 0,877 to 1.000, the anticipated probability being 0.95.