根据重力异常和地震方法结果确定层密度

INTERVAL-DENSITY DETERMINATION BY GRAVITY AND SEISMIC OBSERVATION

地震剖面上的反射波组,既反映了波阻抗界面的存在,也常常反映了密度界面的存在。在既有地震资料又有重力调查资料的地区,能够利用波阻抗界面的分布形态和重力异常的变化,成功地确定波阻抗界面的上、下岩层间的密度差,从而也就能求得所研究剖面段的层密度。本文讨论了利用重力和地震资料确定层密度的方法和试验所取得的初步结果。

The seismic events, recorded from seismic survey, are the reflection of either the existance of the wave impedance interface, or in most cases, the existance of the density interface. In areas where the seismic survey and the gravity investigaton have been made, the density differences among the upper and the lower impedance interfaces could be successfully determined by the shape of such interfaces and the change of the gravity anomaly, and hence the density of the interested interval could be determined. In this paper the interval-density determination by gravity and seismic data was described and its preliminary results were presented.