Study On The Microscopic Pore Change Of Water-flooding Old Oilfield And The Influence Factors Of The Distribution Of Remaining Oil

This study mainly JL oilfield inspection n1- inspection n5 five based on the analysis of well test data, at the same time the scene of the indoor experiment and analysis, combining the micro and macro analysis, based on multiple core parallel simulation test technology, the final results for secondary development plan preparation and provide a scientific basis for improving development effect. Studies the main content is distribution of fluid flow in porous media:In the process of water flooding microscopic pore structure characteristics; Residual oil distribution regularity in microscopic pore characteristics; The influencing factors of remaining oil in microscopic pore analysis and so on.Have met some understanding: The implementation of the distribution characteristics of the JL oilfield crude oil properties. According to the saturation pressure coring well analysis to determine the oil saturation distribution characteristics of the respective area. Determined by mercury intrusion pore structure analysis in unified the mainstream throat radius of 3.5 mu m and the average median radius of districts. The mainstream throat control about 35.87% of the JL oilfield oil saturation; Median radius controls the proportion of district oil saturation.oil displacement efficiency mainly depends on the throat with the control of oil saturation, at the same time, also affected by well spacing, viscosity, wettability.