油藏物理学油藏物理学 (19).ppt
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1、6 Graduation of formation in permeability grade permeabilityevaluation 11000Very good10.11000100good0.10.0110010middle0.010.001101fair 0.001 1Non-permeable7 FACTORS AFFECTING THE MAGNITUDE OF PERMEABILITY(a)Shape and size of sand grains(b)Grain packing and Cementation (c)Fracturing and solution(d)Po
2、re Size and Connectivity(e)Compaction8 Determination of permeability1)The experimental laboratory determinationsA.determinations on small samples of extracted media Apparatus for measuring of permeability with liquidApparatus for measuring of permeability with gasVertical pipe flowmeter method B.determinations on full-diameter core samples 2)calculating permeability by pore radius and porositytortuosity of the porous medium 3)Estimating permeability by log dateHere:a.b.c are constants,characteristics of the fluid and the porous medium
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