Thermal capacity calculation from P-wave velocity and thermal conductivity assessment for Baharyia sandstone reservoir rocks

Abstract

Geothermal recovery is a traditional method for exploiting heavy oil resources. The thermal method of heavy oil recovery persists as the most effective method for the development of huge petroleum resources. Empirical relationships among thermal heat capacity (Cp); conductivity (Tc) and other petrophysical properties such as acoustic wave velocity and thermal conductivity vary on environmental conditions such as rock diagenesis and primary structures. We investigated sandstone samples taken from the Baharyia Formation, northwestern desert, Egypt. The relations between thermal heat capacity and sample porosity have been evaluated for sandstone sequences of the Baharyia Formation. We used the regression models approved by El Sayed, 2011, El Sayed and El Sayed, (2019 and 2023) joined to the Baharyia Formation, allowing us to build advanced relationships. They predict rock thermal capacity (Th. Cap.) and heat capacity (Cp) from laboratory measurements of thermal conductivity (TC) and longitudinal wave velocity (Vp). The present charts are not verified by laboratory-measured specific thermal heat capacity because of a deficiency of laboratory-published data of Cp on similar lithology. The necessity for models of rock thermal property determination based on petrophysical measurements or even well-logging data is significant. The present conclusions are very important to be used in the future to outline specific heat capacity from both thermal and acoustic logging confirmation.