The use of gamma-spectrometry and gamma-gamma-density logging for the study of reservoir rocks of complex structures
The results of the study of the poroperm properties of the complex structure reservoir rocks of the neogene
deposits at the Letnianskyi gas condensate field are considered. The petrophysical model for determining the bulk content of the main components of oil and gas reservoirs is given by data of gamma-gamma-density logging and spectrometric gamma-logging. The petrophysical model of the joint use of the results of gamma-spectrometry and gamma-gamma-density logging is shown.
As a result of data analysis, it has been established that there is a close relationship between uranium content and bulk density. It should also be noted that there is a close relationship between the solid organic matter and the thorium content.
It has been shown that under the conditions of complex structure reservoirs, the complex processing of data of gamma spectrometry and gamma-gamma-density logging allows quantitatively to determine the following parameters in complex structures: clayness, porosity, content of solid organic matter and rock density.