METHOD AND DEVICE FOR PROFILING PROPERTIES OF ROCK SAMPLES OF OIL SHALE THICKNESS Russian patent published in 2021 - IPC E21B49/00 G01N21/00 G01N25/00 G01N27/00 

FIELD: oil industry.

SUBSTANCE: invention relates to the field of research on the properties of rocks of oil source shale strata, namely, the concentration of uranium, thorium, potassium, thermal conductivity, thermal diffusivity, volumetric heat capacity, total organic carbon of rocks in oil source shale strata by continuous profiling of these properties on the core. The method for profiling the properties of rock samples of oil-source shale strata includes profiling the concentration of uranium on rock samples of oil-source shale strata located in one row on a conveyor platform moving at a constant speed in the direction of its movement. At the same time, in order to obtain additional information about the properties of rocks of oil source shale strata, the number of profiled properties of rocks is expanded, for which, in addition to profiling the concentration of uranium during the same process of movement of the conveyor platform, profiling of the thermal conductivity of rocks along the same set of rock samples is carried out, then according to the results of profiling of thermal conductivity rocks define the profile of the total organic carbon content along a set of rock samples, after that, using the obtained profiles of uranium concentrations and total organic carbon content, the profile of the ratio of uranium concentration to the total content of organic carbon along the set of rock samples is determined, then using the obtained profile of the ratio of uranium concentration to the total content of organic carbon along the set of rock samples, the redox is reconstructed. sedimentation conditions. Using the obtained profiles of uranium concentration and thermal conductivity of rocks of oil source shale strata, the relationship between the concentration of uranium and thermal conductivity of rocks is established, and the established relationship and thermal conductivity profile are used to detail the profile of uranium concentration with a spatial resolution equal to the spatial resolution of thermal conductivity profiling. Using the results of profiling the uranium concentration and the total organic carbon content, the generation potential of the rocks of the oil source shale strata is determined. The identification of intervals corresponding to natural reservoirs and sections of the section, promising for development using reservoir stimulation technologies, using the results of profiling of uranium concentration and thermal conductivity and reconstruction of redox conditions of sedimentation of rocks of oil source shale strata. Using the joint analysis of the results of profiling of uranium concentrations and thermal conductivity and the results of additional profiling of thorium and potassium, the section is dissected according to the recorded properties of the rocks of the oil source shale strata. Based on the joint analysis of the results of profiling the concentration of uranium, thermal conductivity, total organic carbon and the results of additional profiling of thermal diffusivity and volumetric heat capacity, samples of rocks and sections of selected rock samples in depth intervals corresponding to different redox conditions of sedimentation are selected to make additional rock samples of a predetermined size for subsequent laboratory petrophysical and geochemical studies of rock properties.

EFFECT: invention expands the possibility of profiling various physical properties of rocks of shale strata.

15 cl, 5 dwg