Temperature-dependent models for wave velocity of oil sand

Abstract

AbstractKnowledge of how temperature affects the oil–sand acoustic response is useful to exploit these reservoir rocks with seismic methods. We propose three models: double-porosity coherent potential approximation (CPA), lower-bound Hashin–Shtrikmann (HS-), and contact cement (CC), based on different spatial distributions of heavy oil and temperature and frequency-dependent empirical equations. The shear modulus and S-wave velocity are affected by temperature in all the cases. Moreover, the properties of oil sands with heavy oil as a continuous matrix and higher viscosity are more sensitive to temperature. The models can provide theoretical support for the establishment of rock physical models in heavy oil reservoirs so as to quantitatively characterize the seismic response changes caused by thermal mining.Keywords: Heavy oiloil sandrock-physics modelsspatial distributiontemperaturewave response Disclosure statementThe authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this article.Additional informationFundingThis work is supported by the National Natural Science Foundation of China (grant no. 41974123 and 42174161), the Jiangsu Province Science Fund for Distinguished Young Scholars (grant no. BK20200021) and research fund of North China University of Water Resources and Electric Power (No. 202209020).