Fine logging evaluation of Paleogene glutenite reservoir——Take the example of Niuxintuo sag, west of Liaohe depression

Oil layers in Niuxintuo sag of Liaohe depression has the characteristics of being in glutenite reservoirs, low porosity and low permeability, but logging evaluation is difficult to make. Therefore, a systematic petrophysical analysis has been carried out in this research area. Through 'four properties relations' research, the lower limits of oil-bearing characteristics, lithology and physical property have been respectively determined. Based on formation testing and formation testing data, the identification graph of oil layers has been established. By using core analysis and porosity calibration from logging data, the porosity interpretation model has been established. With litho-electric analytical data, the important parameters needed by oil saturation calculaltion have been determined. By archie equation and mercury injection data, the oil saturation of glutenite reservoir has been acquired. In the process of the research, a set of logging evaluation methods of glutenite reservoirs have been developed, which greatly improves the accuracy of well logging interpretation.