中国石油网消息：3月25日记者获悉，煤层气公司将常规“三开”井身结构优化为“二开”，自去年11月至目前，已在4口井成功试验。该项优化使平均单井钻井周期缩短53％，单井成本同比下降24％。

China Oil News: On March 25th, a reporter learned that the coalbed methane company has optimized the conventional "three-stage" well structure to a "two-stage" structure. Since last November until now, this optimization has been successfully tested in 4 wells. This optimization has shortened the average single-well drilling cycle by 53% and reduced the single-well cost by 24% compared to before.

作为煤岩气开发的核心环节，钻井工程的效率与成本直接决定资源开发的效益。煤层气公司聚焦钻井提速、降本、增效核心目标，以井身结构优化作为重要突破口，系统推进理论创新、技术攻关、现场实践“三位一体”协同攻坚，为煤岩气规模效益开发注入强劲动能。

As the core part of coal seam gas development, the efficiency and cost of drilling engineering directly determine the benefits of resource exploitation. The coalbed methane company focuses on the core goals of accelerating drilling speed, reducing costs, and increasing efficiency. It takes optimizing the wellbore structure as an important breakthrough point, and systematically promotes the "trinity" collaborative efforts of theoretical innovation, technical research, and on-site practice to inject strong momentum into the large-scale and efficient development of coal seam gas.

公司组建专业技术团队，聚焦区域地质特点，开展多轮地层评估与压力系统精准论证，精细研判地质条件，构建起地层适应性评价、安全密度窗口精准核算、长裸眼段风险预判三大理论支撑体系。在此基础上，编制形成分区域、分层系的井身结构优化指南，为技术规模化推广提供了坚实的理论基础，提升了井身设计的科学性。

The company established a professional technical team, focusing on the regional geological characteristics, conducting multiple rounds of stratum assessment and precise pressure system analysis, meticulously analyzing the geological conditions, and constructing three theoretical support systems: stratum adaptability eva luation, precise calculation of safe density window, and risk prediction for long open-hole sections. On this basis, they compiled and formed wellbore structure optimization guidelines for different regions and layer systems, providing a solid theoretical foundation for the large-scale promotion of technology and enhancing the scientificity of wellbore design.

针对长水平段井“三开改二开”这一技术方向，技术人员靶向破解长裸眼段井壁稳定、轨迹控制、高效破岩等方面的共性难题，形成强封堵钻井液、高效破岩与轨迹控制等成套技术体系，实现中间技术套管取消、钻进井段合并的技术突破。

Regarding the technical direction of "replacing three-stage drilling with two-stage drilling" for long horizontal wells, the technicians targeted and solved common problems such as wellbore stability, trajectory control, and efficient rock breaking in the long open-hole sections. They formed a complete technical system including strong sealing drilling fluid, efficient rock breaking, and trajectory control, achieving a technological breakthrough of eliminating intermediate technical casing and merging drilling sections.

公司秉持“试点先行、样板引路、全面推广”的工作思路，在4口水平井试验取得成功的基础上，今年将有序推广应用井身结构优化技术，实现技术规模化应用、效益最大化释放。同时，强化钻井全流程投资管控，推动钻井周期大幅缩短、投资成本显著下降，全面实现“提速、降本、增效”目标，为煤岩气效益开发提供坚实技术支撑。

The company adheres to the working approach of "pilot first, set an example, and then promote on a large scale". Based on the successful trial results of 4 horizontal wells, this year it will orderly promote the application of well structure optimization technology, achieving large-scale application of the technology and maximum release of benefits. At the same time, it strengthens the investment control throughout the drilling process, promoting a significant reduction in drilling cycle and a notable decrease in investment costs, and fully achieving the goals of "speeding up, reducing costs, and increasing efficiency", providing solid technical support for the efficient development of coal and shale gas.