如何充分利用报废资源降低油气田开发投资和成本 ,运用先进的套管开窗侧钻定向井技术 ,能有效地解决川西地区失去开采价值的近百口生产井进一步挖潜的技术难题。侧钻井开窗方式已由原来的斜向器套管开窗 ,逐步发展到锻铣和地面套管预开窗方式。文中分析在川西地区老井开窗侧钻定向井 ,浅井可节约投资 40 %左右 ,中深井可节约投资 44 %左右 How to make full use of scrap resources to reduce the investment and cost of oil and gas field development and to use the advanced casing drilling sidetracking directional well technology can effectively solve the technical problems of tapping the potential of nearly 100 production wells that have lost their mining value in western Sichuan. Side-hole drilling method has been from the original diagonal tube casing window, and gradually developed to forging milling and ground casing pre-opening mode. In this paper, drilling directional wells are drilled in old wells in the west of Sichuan Province, which can save about 40% of the investment, while the deep wells can save about 44% of the investment