2.5D重力双重加权聚焦反演及其应用

2. 5D dual-weight focusing inversion of gravity and its application

针对聚焦反演方法在实测数据应用中存在的趋肤效应和反演结果发散问题,设计应用深度加权和数据加权的双重加权系数灵敏度矩阵,进行核函数处理。通过反演拟合理论正演模型实验,证明了该方法的可靠性。将双重加权系数运用到山东某矿区的实测数据,反演结果清晰地反映出地下异常体的边界和深度,与剖面电阻率结果比较,两者异常位置接近,该方法可反应实际异常情况。

Aiming at the problems such as skin effect of imaging and divergence of anomalous source for focu sing inversion in the practical application,the authors designed sensitivity matrix with double weighted coefficients including depth-and data weights in order to deal kernel function.By fitting inversion theoretical forward model experiments,it is proved that the method is of reliability.The double weighting factors were applied to the practical data of a mine in Shandong,in which the inversion results clearly reflect the boundaries and depth of underground anomalies.Compared with the results of the cross-section resistivity,the both are close in abnormal positions.The method can reflect the actual anomalies.