摘要
复杂岩性储层孔隙结构以及微米孔喉的评价是目前测井解释深入到微观领域评价的新方向。基于核磁共振测井基本理论,提出将分段等面积法和相似对比法有机结合,构建利用T2谱计算伪毛细管压力曲线的模型。结合岩心实验数据,建立了孔径分布及最大孔喉半径等孔隙结构参数计算模型。与岩心实验结果对比表明,最大孔喉半径、排驱压力、饱和度中值压力等孔隙结构参数与岩心实验结果均具有较好一致性。利用伪毛细管压力与孔隙结构参数计算模型对PL地区低孔隙度低渗透率储层进行孔隙结构评价,展示了核磁共振测井在储层孔隙结构评价方面具有独特优势。
Complex lithology pore structure and micron pore throat evaluation is a new direction for the microscopic logging interpretation and evaluation. In previous studies of digestion and absorption basis, proposed is a method to combine the Equal Area method with the Similar Comparison method which converted the T2 spectrum distribution into the pseudo capillary pressure curve based on theory of NMR logging. Further combined with the core experimental analysis data, pore size distribution and maximum pore throat radius, etc. , the pore structure parameter calculation models have been established. It＇s shown that the maximum pore throat radius, threshold pressure, median saturation pressure and other pore structure parameters are in good agreement with the core experimental results. The NMR logging evaluation of reservoir pore structure has unique advantages based on the PL regional low porosity and permeability reservoir pore structure evaluation with the pseudo capillary pressure and pore structure parameter calculation models.
出处
《测井技术》
CAS
CSCD
2015年第1期62-67,共6页
Well Logging Technology
关键词
核磁共振测井
低孔渗储层
横向弛豫时间谱
伪毛细管压力曲线
孔隙结构评价
分段等面积法
相似对比法
nuclear magnetic resonance logging
low porosity
permeability reservoir
trans-verse relaxation time spectrum
pseudo capillary pressure curve~ equal area method
similar comparison method
