Potential Evaluation On Oil-water Layers And Enlarging Boundary Of Transition Zone In Lamadian Oilfield

By making full use of the continuously enriched drilling data,static and dynamic data,this paper recognized the structure of transitional zone,the oil-water interface,reservoir's developing characteristics of oil-water layers and outstep.According to the information described by the core data,we analysed the bottom depth of the oil layer and the top depth of the water layer to find out the changing regularity of them.Besides,we re-established oil-water interface,and based on it,we re-checked the boundary line of each belt.From the current development status of the reservoir,we analysed the using situation of oil-water layers.We studied the relationship between water content and depth in different blocks,and fixed the developable boundaries.We estimated the reserve volume of oil-water layers and gave a comprehensive evaluation on potential of oil-water layers in different blocks.By doing these works,we further confirmed the potential of oil-water layers in Lamadian oilfield.To cost-effectively develop the blocks on which no wells located or less wells located,it is necessary to make certain of the oil-water distribution in the enlarging boundary of transitional zone,find out the potential of outstep and the boundary we can enlarge.By analysing the status of well testing and productions,we predicted the oil-water distribution,the structure of outstep,the development status of the reservoir and the potential distribution of the outstep from about there aspects,including sand/effective thickness and initial productivity.On the base of these predictions,we confirmed the enlarging boundary in different oil price.Otherwise,we optimized the dominant blocks and belts to design out stepping wells.By doing these works,we implement the potential of outstep on the one hand,and further confirm the outer boundary of transitional zone on the other.The research on oil-water layers and enlarging boundary of transitional zone in Lamadian oilfield can provide a theory basis for the future improvment of effective development to the oilfield.