地震双波法预测孔隙度

Use of P-wave and S-wave in Porosity Prediction with Seismic Data

在综合分析用地震资料预测孔隙度现有方法的基础上,提出了一种新的预测孔隙度的公式。该式基于纵、横波速度与孔隙度、泥质含量间的线性关系,仅用纵、横波速度即可求出孔隙度,而不需用其他参数。利用文献中的数据和实际井孔资料对该式预测精度进行的检验结果表明,其预测精度高于现有各种经验公式,并具有良好的稳定性。

Based on an analysis of the linear relationships among P-wave or S-wave velocities, porosity and clay content, a new formula is proposed for predicting porosity. Using this.formula,the porosity may be derived from P-wave and S-wave velocities with no other parameters needed.The predicting accuracy of the formula is examined, using the data in literature and from actual field.The examination shows that this formula has the advantage in accuracy over the empirical formulae available. The stability in accuracy of the formula is also proved satisfactory.