TITLE:
Numerical Simulation for Hot Dry Rock Geothermal Well Temperature Field
AUTHORS:
Hao Yang, Yuan Shao
KEYWORDS:
Hot Dry Rock, Geothermal Well, Temperature Field, Numerical Simulation
JOURNAL NAME:
Advances in Chemical Engineering and Science,
Vol.7 No.1,
December
21,
2016
ABSTRACT: Study
on temperature distribution simulation during cementing of hot dry rock (HDR)
geothermal well is rare. It has important guiding significance to simulate the
construction process of temperature distribution of hot dry rock on site
construction. Based on numerical simulation of HDR considering heat-fluid-solid
coupling, the influence of temperature distribution on well cementing is
analyzed when the drilling fluid cycles and reaches stable state, respectively,
and when the cement slurry is injected during the cementing process. It is
found that the seepage at the well bottom accelerates the flow velocity of
wellbore; the stable temperature change is less than the cyclic temperature
change; and the upper and lower temperature variation of the stratum is greater
when the cement slurry is injected. Therefore, as to cement retarder involved,
the influence of temperature variation on concretion should be considered
during cementing of the hot dry rock geothermal well.