一种精确的纵波速度计算方法

长久以来纵波速度的拟合公式,研究多是基于实验室测量,缺少现场数据的支持。立足于现场测井数据,对冀东油田南堡4号构造带下第三系三角洲前缘亚相地层的纵波速度计算方法进行了研究。首先,选取了对纵波速度影响最大的因素,并确定了由这些因素组成的方程的形式;然后,用该方程计算了工区内单井的纵波速度,并将相关系数同使用Gardner公式和De-hua Han公式所计算的相关系数进行了对比。对比结果表明,拟合纵波速度效果要好于Gardner公式和De-hua Han公式的拟合效果。

An Accurate Calculation Method of Compressional Wave Velocity

In past most of the studies for compressional velocities are based on experimental measurements, which lack the support of field data. The purpose of this study is to estimate the compressional velocities based on well log data of delta front subfacies of Lower Tertiary ages of Ji-Dong oil field, China. At initial stage we have chosen the well log parameters (effect factors) which strongly influence on compressional velocities and established a new modified equation for compressional velocities, which is based on these effect factors. Then Gardner, De-hua Han and this newly established equations were utilized to calculate the compressional velocities in each well. Finally, Least-square regression was carried out to check the fitting of each equation. Regression results clearly indicate that our purposed equation shows better fitting as compared to Gardner and De-hua Han equations.