The Evaluation And Potential Development Of Bottom Water Reservoir Of Different Viscosity In Diffent Mothod

The existence of bottom water has increased the energy supply in reservoir Formation energy that has reduced can be restored in time.However,well bottom hole pressure is decreased obviously during production,thus the bottom water is coning easily and degree of reserve recovery is dropped.Especially when oil viscosity is high,comparing with cold production methods,well bottom hole pressure is much lower and water coning phenomenon is more obvious with cyclic steam injection and other thermal oil recovery methods.Reservoir simulation models of different oil viscosity of Sudan typical district are established to study.Production evaluation and history match are bone done to analyze the remaining oil distribution pattern and the main controlling factors.The corresponding development strategies are put forward for certain kinds of remaining oil distribution pattern;cyclic steam injection mechanism numerical model with bottom water is built to compare the production effect of cold production method and thermal recovery method.Different bottom water volume,different ratio of vertical permeability to horizontal permeably,diffident interlayers' pattern and other parameters are taken into account to guide the development of bottom water reservoir.Oil development plans are made for reservoirs with different oil viscosity.Production prediction data are gathered to support high-efficient development and later period adjusting.Combined with the remaining oil distribution evaluation and feasibility assessment,corresponding development strategies are proposed for different oil viscosities reservoirs in Sudan.The results in this paper provide a reference method and procedure for developing similar bottom water reservoir...