Horizontal sidetracking technology has been developed so as to make full use of these old wells with shorter drilling cycle and less drilling cost by window opening and sidetracking in these wells.

• 为了充分利用老井眼的价值，采用侧钻水平井技术开采新的气藏取得了较理想的效果：对老井重新选层开发，充分利用了老井上部井段的套管资源，缩短了钻井周期，大幅节省了钻井费用。