Acta Scientiarum Naturalium Universitatis Pekinensis

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The Regression Analysis Study on Velocity and Porisity, and Clay Content of Rocks

SHI Ge1,YANG Dongquan2   

  1. 1Department of Geology, Peking University, Beijing, 100871;2Department of Engineering Mechanics of Tsinghua University, Beijing, 100084
  • Received:2000-01-08 Online:2001-05-20 Published:2001-05-20


史 謌1,杨东全2   

  1. 1北京大学地质学系,北京,100871;2清华大学力学系,北京,100084

Abstract: The typical samples with different lithological characters are collected from two wells of representative reservoir consisting of sandstone and conglomerate of positive rhythm. Compressional and shear wave velocities, porosity, and clay content are measured in two states fully saturated with water(Sw=1) and gas(Sw=0), respectively. The regression analysis shows that the velocities are liner relationship related to porosity and clay content. Using such regression formula to sonic logging data indicates that the coefficients of the formula should be determined by statistical method about specific area, instead of fixed values.

Key words: velocity, porosity, clay content, regression analysis

摘要: 在复杂的正旋回砂砾岩储层中,从两口井系统地采集了不同岩性的典型样品,在不同的有效压力及两种状态(气饱和和水饱和)下测试了岩石的纵、横波速度。利用回归分析得出纵、横波速度与孔隙度、泥质含量线性相关。回归公式应用于声波测井资料的结果显示,对于特定的地区,岩石波速和孔隙度、泥质含量关系的具体表达式应从井资料经统计分析得到,没有一个统一的公式适用任何地区。

关键词: 纵, 横波速度, 孔隙度, 泥质含量, 回归分析

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