Single Well Group Sub-layers Driven Design Optimization Study

At present, the Sa Er Tu oil field has already entered into the later exploitation phase of the high containing water, in the high composite water cut, the high degree of reserve recovery and the high oil production rate of remaining recoverable reserves, the stable production is difficult for the oil-field development. Along with the crude oil production cost unceasing rise,the overall economic efficiency of the oil-field development gradually will become bad. In 2004 had widely popularized and applied in the polymers industrialization of the second kind oil layers, obtained obviously effect, became the important technical method for the oil field to make up the scaling down of production. This article's goal is foundation of the polymer flooding's dynamic target change rule in the second kind oil layers sub-areas ,researchs on the optimization design method of single well driving oil in the second kind oil layers, which provides the powerful guarantee for the oil field to further cost cutting and beneficiate and continuing development.This article summarizes the target change characteristics which are the produced fluid, the oil producing and containing water of the filling polymers sub-area in the middle area of Sa Er Tu's the second kind oil layers in Daqing Oil Field, analyzes the change rule of the filling polymers dynamic characteristic. On the base of the establishment massive sub-areas data, contrasts and analysises the deposition characteristic, the flooding characteristic, the degree of reserve recovery, the employ condition, the connectivity condition and so on many factors of the second kind oil layers'industrialization sub-area, on base of the effect regular of filling polymers in the second kind oil layers , through the study of each factor which has an effect on single well-group flooding summarizes the difference between different well-group of two kind of oil layers. Using the experience and the fruit optimizes designing the injected scheme of single well-group of Gaoâ…¡oil layer in the eastern and western of North the 1st Area and establishes an optimizing standard of single well-group polymer injection parameter ,under the high recovery degree before polymer injection, which makes the effect of this area better than the two polymer injection area before and plays an important role in increasing final polymer injection recovery degree in Gaoâ…¡oil layer. These research results consummat the polymer injection development theory which provides a practical valid method for optimizing polymer injection scheme and improving polymer injection development effect.