Percolation Characteristics And Influencing Factors Of Low Permeability Reservoir In Xingnan Area

Through constant velocity mercury technology,casting techniques, simulated apricotsouthern water infiltration rate research building of low permeability sandstone reservoirmicro pore characteristics of gap structure, permeability characteristics,diagenesis of layerproperties,and achieved the following understanding:Apricot Southern permeability reservoir sand body characteristics: apricot Southern sheetreservoir is divided into five types, including: river edge reservoir, river reservoir, withreservations; worse type of local storage layer, good reservoir properties, mainly in the SIIand the PI and other layers; filling contiguous reservoirs; the physical properties of theprevious two categories, and smallcompared to the differences of permeability, sand sheetstorage stable, high shale content, poor physical properties, reservoir thickness thinner;scattered reservoirs, The deposition site near the edge of the edge phase, reservoir propertiesworse, was scattered. Sheet to muddy siltstone lithology mainly poor sorting, lowpermeability, oil saturation is low. Microscopic pore structure characteristics of apricotSouthern District permeability reservoir: the use of capillary pressure curve obtaineddistribution throat microscopic pore structure and related parameters and were analyzed andfound to increase with the mean coefficient, lower porosity and permeability; values withincreasing radius, the physical property is good.R50strong correlation with K; with theincrease of the maximum porethroat radius, things have changed for the better, a goodcorrelation with the maximum capillary permeability throat radius; with the increasingvolumeratio of pore throat, things have changed for the melhor.os main factors which affect the rockpores have fillings, and in diagenesiscontact with the relations of particlesIt can be seen from the analysis of the evolution of reservoir porosity of the block,reservoir rock properties at the beginning of the deposition had not bad, after a series ofdiagenesi, making properties decreased,low permeability reservoir, the reservoir properties,the evolution ismainly controlled by diagenesis. By Zhu Guohua (1985) classification, theblock reservoir compaction-metasomatic low permeability reservoir.Low permeabilityreservoir percolation characteristics: The rate constant of mercury experiments oflowpermeability of thefiltration characteristics of the deposit, the proportion of holes of thepermeability of small and medium-sized enterprises, more low, the distribution of the rate ofpenetration of the area controlled by the hole in the throat in the lower tank. Permeability ofnon Darcy fluid belongs tolow permeability, the pressure of mercury, in the process ofimplementation of high pressure.Apricot Southern permeability reservoir is mainly composed of small throats control:after sample data analysis, apricot Southern District permeability reservoir is mainlycontrolled by small throats.