Heavy Oil Thermal Recovery Steam Injection Ground Pipeline And Wellbore Hydraulic Thermodynamic Coupling Model

During the course of steam-injected thermodynamic oil exploitation, energy loss in the ground pipeline and well bore(especially well bore)has a direct influence towards thermal recovery effect. Today there have been some the theoretical investigation productions about energy loss in the ground pipeline and well hole. Owing to the limit of subject development and computer application,there are some problems about energy loss'calculating methods,which make the result deviate practical situation greatly. At the same time, the illogical parameters of steam-injected thermodynamic oil exploitation also increase heat loss.Applying the basic theory of heat transfer. This paper have established the ground pipeline and well bore temperature field model of steam injection ,and study the influencing factor of the parameters of steam-injected thermodynamic oil exploitation and energy loss.By adopting techniques and methods such as reservoir engineering and numerical simulation and computer in research. It is a good method to alternate computation of these factors,including the heat loss and steam pressure and steam quality of the ground pipeline and well bore and the overall coefficient of heat transfer in well bore,and then make the program completely analyse some parameters in the ground pipeline such as diameter and thickness of adiabatic layer how to influence steam quality and steam pressure and heat loss,and then analyse some parameters such as mass flowrate and steaming pressure and steaming quality how to influence steam quality and steam pressure and heat loss in the well bore.Applying the basic theory of heat transfer and flow in continuous and porous media,it is founded by mathematical model of formation temperature field in of accord with real condition. Numerical solution is given to mathematical model of formation temperature field by full implicit finite difference method.At last, one simple steam drive model is simulated to apply numerical reservoir simulation software ECLIPSE,the suited inject condition in the bottom of a well is evaluated, and then cipher out stem parameters of boiler export.