基于重力及重力梯度数据的位场偏移成像

摘要

为了验证位场偏移快速成像方法的有效性以及对比基于重力和重力梯度数据的偏移成像的效果,笔者利用MATLAB编写了重力及重力梯度数据位场偏移成像的算法,并进行了模型正演计算,发现基于梯度数据的偏移成像的横向分辨率、抗噪性和抗背景场能力好于重力数据的偏移成像,并且能够较好的确定模型的中心埋深.将此方法应用于葫芦岛市黑鱼沟的某铅锌矿洞的深度计算中,验证了该方法的有效性.%In order to verify the effectiveness of potential field migration for rapid imaging method and to com-pare the migration imaging results based on gravity and gravity gradient data,the authors used MATLAB to program the arithmetic of the potential field migration imaging for gravity and gravity gradient data,and proceed the model-ing calculation.It was found that the horizontal resolution,noise immunity and the capacity of separating ambient field of migration imaging of gradient data was better than that of gravity data.Moreover,migration imaging of gra-dient data could determine the depth of the centers of models more precisely.The method was applied to the calcu-lation of the depth of a lead-zinc deposit mine tunnel in Heiyugou of Huludao City,and it was proved to be effec-tive.