基于改进型阿奇公式法定量评价水淹层

Quantitative evaluation of water flooded layer based on modified Archie model

 丁圣¹ 周志峰²

中国石化石油物探技术研究院，江苏 南京 211103 中国石化中原油田分公司采油五厂，河南 濮阳 457001）

Geophysical Research Institute, SINOPEC, Nanjing 211103, China No.5 Oil Production Plant, Zhongyuan Oilfield Company, SINOPEC, Puyang 457001, China)

 阿奇公式是计算含油饱和度的基础，但利用此公式计算水淹层含油饱和度、定量评价水淹层时存在局限性，主要是未考虑主要参数的动态变化。文中针对水淹层受注入水影响不断变化的特点，通过岩电实验数据，分析了注入水矿化度对阿奇公式中岩电参数和地层水电阻率的影响，建立了油田开发中后期储层岩电参数和地层水电阻率与地层水矿化度的函数关系，实现了岩电参数和地层水电阻率的反演，进而提出了适用于开发中后期水淹层含油饱和度计算的阿奇公式优化模型。实际资料解释表明，改进模型能很好地考虑生产资料的动态变化，能精确计算出水淹层的含油饱和度，结合含水率，为定量分级评价水淹层提供了科学依据。

 The Archie model is the basis for calculating oil saturation, but it is limited in the calculation of oil saturation in water flooded zone by using this formula because the dynamic changes of the main parameters are not considered. Considering the characteristics of the water flooded layer are influenced by water flooding, through the experimental data of rock, the effect of the salinity of injected water on the electrical parameters and the formation water resistivity is analyzed, and the function relationship between reservoir rock electrical parameters, formation water resistivity and salinity in middle and later stages of oil field development is established. The inversion of the electrical parameters and the formation water resistivity is realized, and the optimization model for Archie formula of water flooded layer to calculate oil saturation in middle and later stages of oil field development is put forward. The actual data interpretation shows that the improved model takes the dynamic changes of production data into account and accurately calculates the oil saturation of the water flooded layer, which provides a scientific basis for quantitative grading evaluation of water flooded layer with water content.

10.6056/dkyqt201605012