Fuyang reservoir in outer area of Changyuan in Daqing is extra-low permeability reservoir. Due to the close low permeability of different blocks, the low and extra-low permeability classification method is not suitable for distinguishing the difference of the movable fluid percentage and development potency. According to the core permeability, they were divided into four classes: 1~2×10-3,2~5×10-3,5~10×10-3,>10×10-3μm2 .And the change law of movable fluid of each class core was studied as well as effect of centrifugal force on movable fluid. The results show that, the relevance of movable fluid and porosity is inconspicuous while the relevance of movable fluid and permeability is obscure;Compared with cores of the same permeability class from other oilfields, the movable fluid of Changyuan outer area is lower;The lower the permeability class is, the further the centrifugal force would influence.%大庆长垣外围扶杨油层属特低渗储层。研究该地区可动流体百分数规律时发现，由于扶杨油层各区块渗透率普遍较低，利用低渗透-特低渗透的分类方法不利于体现各类区块可动流体百分数及开发潜力的差异性。因此将钻取的天然岩心按渗透率大小分为1~2×10-3、2~5×10-3、5~10×10-3、>10×10-3μm2四个渗透率级别，研究各级别岩心的可动流体百分数变化规律及离心力对可动流体百分数的影响。结果表明：长垣外围地区可动流体百分数与孔隙度并无明显相关关系，与渗透率有一定相关性但相关关系并不十分明显；在相同渗透率级别下，长垣外围油田可动流体百分数低于其他油田；渗透率级别越低，可动流体百分数受离心力的影响越大。
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