Study on Dynamic and Static Interpretation Method of Oil and Water Layers in L Oilfield

The L oilfield has been put into production for a long time, with many structural types, and the main structural has been encrypted once. However, as the field continues to expand, the oil and water distribution is becoming more and more complex, and the phenomenon of dynamic and static inconsistencies is often encountered in the development process, and there are low resistivity layers in some well areas, resulting in the original single-parameter oil-water identification chart and single-well oil-water interpretation method can’t meet the needs of oilfield development. At the same time, for the needs of oilfield-level fine reservoir description and the expansion of the old area, it is necessary to carry out fine oil and water interpretation for the wells in the region, so as to provide more accurate geological basic data for later measure adjustment. In this paper, based on the logging response characteristics of typical wells in L oilfield, logging parameters are optimally selected and composite parameters are constructed to establish an oil-water layer identification chart. Then the chart is used, combined with dynamic and static data, to correct the oil-water properties to form a comprehensive dynamic and static oil-water analysis method. Applying this method to fine interpret the oil-water properties of all wells in L oilfield, the number of oil layers decreased by 363, the number of oil-water layers increased by 182, 181 effective layers were written off, and the effective thickness was written off by 136.6 m, which explained the production situation more reasonably.