利用常规测井物性曲线重构毛细管压力曲线  

The Capillary Pressure Curve Reconstruction Based on Conventional Log Physical Properties

作　　者：王培春 李兴丽 张琳琳 邢仁东[2] 

机构地区：[1]中海石油有限公司天津分公司,天津300452 [2]中海油田服务股份有限公司,天津300452

出　　处：《测井技术》2012年第1期33-36,共4页Well Logging Technology

摘　　要：为更好地研究盖层封闭能力和储层的岩石孔隙结构,提出一种利用常规测井曲线获得毛细管压力曲线的方法。介绍了压汞毛细管压力曲线的双曲线特征,指出毛细管压力曲线的形态由完全连通的孔隙体积、门槛压力和孔喉几何因子确定。分析了现有计算方法的不足,结合现有常规测井物性资料,对重构毛细管压力曲线的关键参数进行了大量统计分析。门槛压力与孔渗比值存在很好的拟合关系,通过建立二者之间的回归关系式可直接求取门槛压力。利用渤海地区压汞资料和常规测井曲线拟合出了压汞毛细管压力曲线。实际资料验证表明该方法能够满足油田勘探开发以及科研需要。In order to study the seal ability of cap rock and the rock pore structure oI reservoir m depth, a new method is provided to get capillary pressure curve with conventional well logging data. Introduced is hyperbolic curve feature of the capillary pressure curve, and it is indicated that the curve shape is determined by completely interconnected pore bulk, threshold pressure and pore throat geometrical factor. Analyzed are the disadvantages of existing computing meth- ods. Combining with conventional logging data, a large number of statistic analyses are used for key parameters of restructuring capillary pressure curves. It is believed that the threshold pres- sure has good fitting relationship with porosity-permeability ratio, and it is possible to get the threshold pressure directly by structuring regression equation between them. Mercury injection capillary pressure curve of Bohai area is fitted with mercury-injection and conventional well logging data in this area. Practical application indicates that this method can meet oilfield exploration and research demand.

关 键 词：测井曲线 压汞 毛细管压力 门槛压力 孔喉几何因子 孔隙度 渗透率 

分 类 号：P631.84[天文地球—地质矿产勘探]