By use of oriented perforator,a certain variance of angle and azimuth between actual perforated hole and former design is made which mainly caused by hole trace,perforated hole angle.

• 采用定向射孔,使得实际射孔孔眼与原来设计的具有一定角度和方位的偏差,主要有孔眼轨道产生的偏差、孔眼角度产生的偏差等。