Abstract
The fluid mechanics, solid mechanics, and heat transfer theories are used to establish a thermal-hydro-mechanical (THM) coupling model of thermal recovery. The numerical solution of the model is obtained according to the finite element method using COMSOL, where the seepage and stress field near the well are simulated and the effectiveness of the numerical model is examined by comparing the simulation results with the field test data. In addition, the influence of injection-production parameters on the pressure on a casing pipe is simulated with the model. The results indicate that both the decline of well bottom-hole pressure and the increase of steam injection rate may cause casing damage. Proposed measures for preventing casing damage include controlling the change scope of well bottom-hole pressure and restricting the steam or water injection rate.
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