【摘要】 本文提出采用快速模拟退火方法进行重力及其梯度数据与地震数据的联合反演,可以改善以往该类方法对界面的突变区域无法识别的缺陷。首先推导出密度界面起伏与重力导数之间的对应关系,为更好描述实际地层的水平密度变化,将地层之间的密度差设为随位置变化的函数;然后通过理论模型试验证明该方法能很好地进行界面反演,且对于界面突变区也有很好的效果;最后应用该方法对M区实测数据进行处理。结果表明,利用改进的快速模拟退火法进行重力及其梯度数据与地震数据的联合反演,能很好地揭示物性界面的分布特征,且计算稳定、精度高。更多还原

【Abstract】 Conventional inversion methods cannot recognize sudden change surfaces.To solve this problem,we present in this paper a joint inversion method of gravity,gravity gradient and seismic data using the very fast simulated annealing(VFSA).First,we derive the corresponding relation between density interface and gravity derivative.The density contrasts are set to be functions variable with locations to delineate the horizontal variation of density.Then,we use the VFSA method on model data,and accomplish successfully the inversion of sudden change surfaces.At last,this VFSA method is applied to real data acquired in M area.Application results show that our VFSA method can accomplish successfully the inversion,and effectively display the surface distribution with the advantages of computation stable and high precision.更多还原