Study On The Well-Logging Method Of Interpretation Of Water-Flooded Zones In Bohai Offshore Oil-Field

In this paper,the main content for research is water flooded zone interpretation of P oil field which is the larggest uncompartmentalized oil field of Bohai offshore oil field.After water injection development,along with the advance of injected water, lithology, electrical,physical properties and oiliness have changed of reservoir,well logging curves will have different response of water flooded reservoir.In this article,we studied the variation of water flooded reservior at first,also studied the geological features and the changes of electriical properties in water flooded reservior,laid the foundation of water flooded zone interpretation.Learn the flooded properties of P oil field by the research of mechanism of flood,summarized the geological features and response of logging curves under the different flooded situation,built a database of experts using these information,combined with the model of state-space interpretation,explained the basic unit precise,find out the trend of flood level between reservior by comparing the characteristics of flood between reservoir,successfully realized the distinguish of flood level.In this article,we build a set of water flooded zone parameter calculation models,after qualitative distinguish the flood level of reservoir,accurate calculate parameters of reservoir by the model of double formation water resistivity and method of recursive multiple iterations,realized "first qualitative,then quantitative"of water flooded zone well logging interpretation.This method has compiled into software of sigle well water flooded zone well logging interpretation,actual processing of three coring wells,compared with the core conclusions the coincidence rate was 70.4%,achieved the desired goals.