TY JOUR TI Determination of the lithological composition of sedimentary rocks for the construction of a volumetric model according to GIS data KW petrophysical studies KW lithological composition KW sedimentary rocks KW X-ray spectral analysis KW granulometric analysis JO Oil and gas technologies and environmental safety AU Kalyagin, S.. AU Kalinin, I.. AU Kalinina, E.. PY 2024 IS 2024 PB Astrakhan State Technical University