Modelling of underground geomechanical characteristics for electrophysical conversion of oil shale

12th International Conference on Gas Discharge Plasmas and Their Applications

Bukharkin, A.A.^1 ; Koryashov, I.A.^1 ; Martemyanov, S.M.^1 ; Ivanov, A.A.^1

High Voltage Department, Institute of High Technology Physics, Tomsk Polytechnic University, Tomsk

634050, Russia^1

关键词: Efficient technology;    Electrical discharges;    Elliptic cross-sections;    Energy extraction;    Heat propagation;    Laboratory experiments;    Laminar structure;    Shale gas and oil;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/652/1/012056/pdf
DOI  :  10.1088/1742-6596/652/1/012056

来源: IOP

【 摘 要 】

Oil shale energy extraction is an urgent issue for modern science and technique. With the help of electrical discharge phenomena it is possible to create a new efficient technology for underground conversion of oil shale to shale gas and oil. This method is based on Joule heat in the rock volume. During the laboratory experiments the problem has arisen, when the significant part of a shale fragment is being heated, but the further heating is impossible due to specimen cracking. It leads to disruption in current flow and heat exchange. Evidently, in the underground conditions these failure processes will not proceed. Cement, clay and glass fiber/epoxy resin armature have been used for modelling of geomechanical underground conditions. Experiments have shown that the use of a reinforcing jacket makes it possible to convert a full rock fragment. Also, a thermal field extends radially from the centre of a tree-type structure, and it has an elliptic cross section shape. It is explained by the oil shale anisotropy connected with a rock laminar structure. Therefore, heat propagation is faster along the layers than across ones.