Ultra-low Permeability Reservoir Logging Assessment Of Chang 6 Oil Layers Of Wayaobao Oilfield

The Zhongshanchuan research area of Wayaobao Oilfield is located in the Shanbei slope of the Ordos Basin, Chang6 oil layers is the most important one of the oil-bearing strata. In recent years, with the breakthrough progress of exploration and development in Ordos Basin, the sophisticated analysis and evaluation about reservoir turn to be more important, and the logging data is an important method of reservoir evaluation.This paper launches the research starting from basic geological conditions,with the core observation, cast thin section, scanning electron microscopy, mercury injection analysis study of a variety of experiments and reservoir technology. According to the foundation of research about basic geological features etc for Chang6 oil layer in this area,the paper makes the systemic analysis of lithology, physical properties and oil characteristics of the log response for the key wells, do a detailed study to the oiliness, characters of lithology, physical properties and electricity of the reservoir,and put up the evaluation of the logging for the relationship of four properties of the reservoir. On this basis,with the application of the logging data combining with the basic geological data, the establishment of a low porosity and low permeability reservoir reservoir parameters log interpretation model and its application in low porosity and low permeability oil reservoir identification.Based on low-permeability oil layered evaluation criteria, We made the comprehensive evaluation of reservoir and delineated the distribution range of favorable reservoirs. The research results are guiding roles on the late development of Wayaobao Oilfield.