Electrical and Thermal Properties of Oil Shale of Interest to in-situ Shale Oil Extraction.

摘要

Techniques to measure simultaneously the swept frequency electrical impedance and thermal conductivity and the Differential Thermal Analysis and Dielectric Analysis,have been developed. These techniques,in conjunction with a laser flash thermal diffusivity measurement,have been used to characterize the electrical and thermal properties of Green River oil shale. DTA curves exhibit endothermic decomposition effects in a nitrogen atmosphere. Significant changes are seen in the dielectric response curves during the decomposition of kerogen;dielectric constants increase with increasing temperature and decrease with increasing frequency. All of the experimental techniques utilize,and indeed require,digital data acquisition and processing. The data are being applied to ore bed diagnostics,dielectric heating and electrothermal fracture. A microcomputer controlled dynamic load matching technique to heat oil shale has been developed. In this technique the output power and load impedance of the source are automatically adjusted to provide constant power to the oil shale load.