基于变岩电Pickett图版低孔隙度低渗透率储层流体评价

Saturation Evaluation of Low Porosity and Low Permeability Reservoir Based on Variable Electrical Pickett Plate

从低孔隙度低渗透率储层的岩电、压汞实验出发,提出以孔隙结构控制储层导电性为基础,利用储层品质因子计算变岩电参数的高精度模型,结合储层品质特征,改进并建立变岩电参数的Pickett图版,在数值模拟的基础上,给出了变岩电Pickett图版建立的物理意义,并对比分析了固定岩电参数与变岩电参数Pickett图版、不同储层类型的Pickett图版异同点,明确了低孔隙度低渗透率储层饱和度计算误差主控成因及渤海湾盆地中深层出现的高电阻率水层的导电机理,在实际测井资料定性及半定量解释中显示了较好的效果,为油田的低孔隙度低渗透率储层勘探开发提供可靠的参数及流体性质评价方法。

Based on the rock experimentation of low porosity and permeability reservoirs,mercury experiment is obtained by analyzing the experimental data.The pore structure is used to control reservoir conductivity.The reservoir quality factor RQI is used to compute rock electrical parameters,with integration of reservoir quality characteristics,the Pickett plate is established and improved for variant rock electrical parameters,on the basis of numerical simulation,given is the physical meaning of the electrical Pickett plate.And compared are the fixed rock electrical parameters and variable rock electrical parameters Pickett plates. Analyzed are different reservoir's Pickett plate similarities and differences. We know clearly why there is low permeability reservoir saturation error and analyze conductive mechanism of deep layers with high water blocking in the Bohai Bay basin.The actual log data qualitative and semi-quantitative interpretation shows good results,so providing reliable parameters for the low porosity and low permeability oilfield exploration and development evaluation.