Research Of The Microcosmic Oil Remaining Physical Simulation Of Sandstone

In this article, we create emulational pore model, sand pack and sandstone microscopic pore model for sandstone reservoir in different precipitation facies and then do the displacement experiments. We study the oil remaining regular patterns of distribution.According to pore throat network structure, emulational pore model was made in the means of photochemistry sculpture. The maximal merit of the model is good visibility, so we emphatically analyze displacing agent (water, active water, polymer)manhole mechanism, study the experiment phenomena, summarize microcosmic seepage mechanism, and recognize influencing factors of oil remaining distribution, at last, we get regularities of the oil remaining distribution.Synthetic sandstone model has true sandstone reservoir dielectric condition, and we append clay mineral in the model by new method, which make the model authenticity. Because the model is reusable and it has true sandstone dielectric condition, we make some experiments in water-sensitive and nonoccurrence water-sensitive conditions and study the experiment phenomena, at last, we get the regularities of the oil remaining distribution in the two conditions.Sandstone microscopic pore model reserves arenilitic original interstice structure and most of the agglutinate and interstitial material. The maximal merit of the model is authenticity, so we subtly study the distribution of the oil remaining after water blooding by experiment. Especially for hypotonicity reservoir, where belongs to non-darcy seepage, is influenced by crude oil boundary layer and exists oil wet surface in the hydrophile reservoir bed. In the article we discuss the influence to the distribution of oil remaining by these factors.The article firstly synthesizes each model merits to study the methods of oil remaining, and discusses routine water displacing oil microscopic mechanism, and then summarizes the regular patterns. At the same time, we summarize the regular patterns after both active water flooding and polymer flooding and get the method of studying microcosmic oil remaining and analyzing microcosmic oil remaining. The clue in this article can be preceded in the middle and anaphase exploitation in the east.