Calculating models for heating radius of cyclic steam stimulation and formation parameters in horizontal well after soaking

Abstract

The calculations of heating radius and the pressure and temperature of formation in horizontal well during cycilc steam stimulation after soaking are the bases for the evaluation of productivity and forecast of dynamic performance of horizontal well.The distribution of steam pressure,temperature and quality along the horizontal sections of wellbore are uneven,because of friction loss of steam.The new calculation models for heating radius and distribution of pressure and temperature in horizontal well after soaking were established on the basis of the variable-mass flow theory and the principle of heat conduction by the use of mass conservation theorem,momentum theorem and energy conservation theorem.The calculation result of the new model is in good agreement with that of the numerical simulation for the same parameters from the same reservoir.