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.
出处
《测井技术》
CAS
CSCD
北大核心
2012年第1期33-36,共4页
Well Logging Technology
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
log curve, mercury injection, capillary pressure, threshold pressure, pore geometrical factor, porosity, permeability
