【摘要】 用三参数双曲线方程采用最小二乘法求解 ,获得毛管压力曲线解析表达式 ,可拟合各类毛管压力曲线整个数据范围 ,便于曲线微分、积分、光滑实验数据、进行曲线外推求阈压 ;便于离心驱替数据计算岩心的入口饱和度。毛管压力曲线可用于估计流体饱和度和自由水面以上的高度以及油水过度带厚度 ;评价岩石的封闭能力 ;划分储集岩和非储集岩、生产层和非生产层 ;确定岩石的孔隙大小分布函数 ;分析岩石的单相流体流动性质 ;在室内快速评价油井工作液对储层的损害 ;确定润湿性和驱替能量 ;计算绝对渗透率和相对渗透率 ;估计采收率。更多还原

【Abstract】 Utility of the three-constant form of the hyperbola has fited to capillary pressure curves by least-squares solution,obtained a general expression for capillary pressure curves.It was found to fit the capillary pressure curves throughout the range of data,allowed differentiation,integration,smooths laboratory data,can be extrapolated to 100% single-phase saturation to obtain the correct threshold pressure,can be differentiated to obtain accurate calculation of the inlet saturation for centrifuge-derived data.The capillary pressure curves can be used in expecting.Fluid saturation and height above the free water level and thickness of transitional zone,evaluating rock sealing property, dividing reservoir and nonreservoir,pay and nonpay,determinating pore-size distribution,analysing the single-phare fluid flow characteristics of rocks,evaluation damage of oil well working fluid to formation, determinating wettability and the energy for fluid displacements,and calculating absolute permeability and relative permeability.更多还原