SAGD مطالعه ي شبيه سازي و بررسي پارامترهاي موثر بر توليد نفت سنگين از مخزن ترك دار كوه موند به روش ريزش ثقلي به كمك تزريق بخار

Because of the decreasing rate of light oil production in the world, heavy oil production, using thermal recovery methods, has become very attractive. Steam assisted gravity drainage (SAGD) is one of the thermal recovery methods which utilizes horizontal wells for both injection of steam and production of oil. This work is the application of such a method in naturally fractured reservoirs and, specifically, the application of SAGD in the heavy oil field of KUH-E-Mond (Sarvak Formation) that is a heterogeneous and fractured reservoir. Based on the available field data a model is constructed and a simulation study using CMC-STARS 93.00 software, is accomplished first, in the parameter study, essential factors, such as steam injection rate, production and injection location and the vertical distance between wells, oil properties (density and viscosity) and steam quality were investigated. Secondly, matrix porosity and permeability and fracture density were studied. In this model, is a dual permeability method was used and the optimum steam rate was found. In this work, oil density in the range of 6.2-19.8 API was stdied and it was found that it does not have considerable effect on oil recovery and SOR. Also, it was found that steam quality of 70% is optimum and matrix porosity is not an important parameter. The distance between fracture or vertical fracture density and matrix permeability demonstrate a considerable effect on the SAGD process.