Research On Production Technology Of Thin Bed And Heavy Oil Reservoir On Wangzhuang Oilfield

The distinguishing feature of Wangzhuang oil reservoir is that the oil bed is very thin, the oil viscosity is very high, and the reservoir bed sensitivity and non-uniformity is very serious. All of these lead to the difficulty of exploitation. Because of the thin thickness of the bed, the high velocity radiation of the heat, the heat is lost greatly and the temperature is very low in the well head, which cause that high pressure of steam-injection, the low dryness fraction of the steam, the low quality of the steam-injection and the short cycle time of product. At the same time, the thinness of the reservoir bed also bring much trouble to some technologic measures, for example, formation solid control and oil reservoir protection, which affect effect of the oil reservoir exploitation. So, the research and use of new technology is of significant sense in the exploitation of this oil field. Based on the analysis of the oil field geology and exploitation feature, this thesis analyses the thermal technology of heavy oil reservoir, and put stress on the exploitation plan and the optimization of production parameters of the steam huff and puff thermal technology. This thesis research the radiation heat regular pattern of oil reservoir, the optimization of production parameters of the steam huff and puff, the feasibility of active water exploitation and so on, using numerical simulation. This thesis also includes the choice of energy supplement, the optimization of formation solid control, the optimization design of well-bore lift and so on. According this, we can get conclusions: there is still a great deal of oil in oil reservoir; based on the theoretical analysis, According to the actual situation, we choose beam pump and screw pump as the lift method. As to beam pump, the fluidity of the production oil mingled with thin oil and chemical viscosity reducing agent can be greatly improved, which has good effect and benefit.