An approach to several problems of steam flooding

Method By using numerical simulation, this paper studies main reservoir parameters and operation parameters which affecting steam flooding,and expounds the relationships between steam soaking and steam flooding,as well as steam flooding and water drive,polymer flooding. Purpose in order to chose rational development scheme,to run steam flooding effectively,and to enhance oil recovery factor. Result Those parameters which affecting development result of steam flooding are net thickness of payzone, oil viscosity, oil saturation, reservoir heterogeneity,ratlo of net gross thickness and leservoir depth;for those reservoirs suitable for steam flooding,good development result can be achieved only when steam injection rate, production-injection ratio and steam quality are higher than their critical values; formation oil viscoslty decides the development scheme of reservoir to a great extent, and steam flooding is more efficient than water drive only when formation oil viscosity is higher than 30 mPa. s. Conclusion Before steam injection,sufficient evaluation for reservoir conditions should be done. Operation parameters of steam flooding should also be met. The optimum development scheme should be chosen through evaluating different developmentsches.