The way of using geothermal resources for generating electric energy in wells at a late stage of operation

International Conference on Innovations and Prospects of Development of Mining Machinery and Electrical Engineering 2018

矿业工程;电工学

Gabdrakhmanova, K.F.^1 ; Izmaylova, G.R.^1 ; Larin, P.A.^1

Ufa State Petroleum Technological University, Branch of the University in the City of Oktyabrsky, 54a, Devonskaya St., Oktyabrsky

452607, Russia^1

关键词: Conductive heat transfer;    Electric energies;    Formation pressure;    Geothermal resources;    Low temperature geothermal energies;    Multi-faceted approach;    Pump-compressor pipes;    Surrounding rock;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/194/8/082012/pdf
DOI  :  10.1088/1755-1315/194/8/082012

来源: IOP

【 摘 要 】

The mathematical model of volcanic treatment by means of conductive heat transfer from the well surrounding rocks has been suggested. We have shown that one of the ways of producing geothermal energy is to heat liquid in the double-tube monobore well. Water is pumped to the annulus between pump-compressor pipe (PCP) and casing pipe. Flowing down to the bottom hole, the liquid is heated up from a casing wall through convective and conductive thermal conductivity which adjoins surrounding rocks. The caloric goes to surrounding rocks from the earth crust interior. The heat flow is at an average equal to 50 MW/sq.m, it can differ depending on the region. The heated to the bottomhole water is lifted back to a surface through the PCP. To minimize heat wastes when lifting, PSP should be made of heat-insulating material. We suggest a multifaceted approach, combining the disposal of low-temperature geothermal energy which contained in the extracted product by means of thermopiles with utilization of the hydrokinetic energy, flood water through the system of formation-pressure maintenance by means of the hydroelectric turbine.