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本文根据石油二次运移原理,在计算本区亲水-弱亲水油藏含油最小喉道半径的基础上,提出了确定油藏含油程度的系数(N)。N值是一个无因次量系数,等于用实测的油藏油柱高度或计算的油藏油柱高度(H)和用排替压力计算的油柱高度(H_D)之比值。N值愈大油藏含油愈好;N值愈小油藏含油愈差;N值等于1时,不可能成为油藏。用最小含油喉道半径所对应的有关压力在毛管压力曲线上求出油藏的原始含油饱和度。计算出马岭中区各油藏的原始含油饱和度平均为67％,而油基泥浆取心实测的原始含油饱和度平均为60％。
In this paper, according to the principle of secondary migration of oil, on the basis of calculating the minimum throat radius of oil in the hydrophilic-weak hydrophilic reservoir in this area, the coefficient (N) for determining the degree of oil content in the reservoir is proposed. The N value is a dimensionless quantity factor that is equal to the ratio of the measured reservoir oil column height or the calculated reservoir oil column height (H) to the oil column height calculated by the displacement pressure (H_D). The larger the N value, the better the oil content in the reservoir. The smaller the value of N, the poorer the oil content in the reservoir. When N is equal to 1, it is impossible to become a reservoir. The original oil saturation of the reservoir is found on the capillary pressure curve using the relevant pressure corresponding to the radius of the smallest oil-filled throat. The original oil saturations of various reservoirs in the Maling middle area were calculated to be 67% on average, while the original oil saturation measured by oil core coring was 60% on average.