Gravel packing in horizontal holes is quite different from that in straight holes because of the direction of the gravel packing being vertical to the gravitydirection.
在水平井中,由于砾石充填方向与重力方向相垂直,因而其充填规律与直井存在着根本的区别。
2
So-called gravity anomaly linear structure signal is derivative of gravity anomaly level total gradient on gravitydirection, and the derivatives must be greater than zero.