Studies On Residual Oil Distributions Of SⅡ10-SⅢ10 Layers In Eastern Fault, B1 Region

With its continuous development, Daqing Oil Field has entered into high water cut production period. Under such a circumstance, it is a great challenge to keep oil and gas production rate stable. The key to realize stable production at high water cut period depends on the studies on residual oil distribution. The research target layers are located in SII10-SIII10 of Eastern fault in B1 region, SZ Oil Field. The paper applies some sedimentary theories and contrasting methods to complete sedimentary phase diagram of individual layer, and the paper has also conducted ration studies on reservoir heterogeneities by conventional methods and difference function of geological statistics, which provides geological base for studying residual oil distribution. On the basis of comprehensive analysis on well logging, core data and production performance data, the watered-out characteristics of different kinds of reservoirs have been obtained. The calculation method of geologic reserve as well as production distribution method for single well has been newly developed, which can calculate oil recovery efficiency of a certain area and make its residual oil quantified. The paper offers a set of integration method than can study residual oil distribution based on various means, measures and data analysis and that can finely identify the types of residual oil. For different areas with different potential of residual oil, the measures such as restrict, modification, perforation and stimulations have been performed and after infill drilling well patterns are put into production, the development results are satisfying, which will provide technical support for optimizing all kinds of stimulation measures.