中国石油网消息：4月10日，记者从煤层气公司获悉，该公司首口超3000米长水平段煤岩气井，顺利完成压裂后“井筒扫塞”作业，实现超长水平段井筒清洁关键技术的突破，为同类井施工提供了可复制、可推广的经验。

China Oil News: On April 10th, a reporter from the Coalbed Methane Company learned that the company's first horizontal coal-rock gas well with a length of over 3,000 meters successfully completed the "wellbore cleaning" operation after fracturing, achieving a breakthrough in the key technology of cleaning the long horizontal wellbore, and providing replicable and promotable experience for similar well construction.

吉深8-3平01井水垂比达1.76，井眼轨迹呈上倾形态，相较亚洲现有最长扫塞纪录井——中石化焦页44-Z5HF井，水垂比更高、井眼轨迹更为复杂。压裂后井筒内残留桥塞、煤块及大量石英砂，理论模拟显示连续管难以抵达井底，作业面临管柱下入易自锁、冲砂扫塞易卡钻等多重技术难题。

The water-vertical ratio of Well 8-3 of the Jishen oilfield reached 1.76. The wellbore trajectory was inclined upwards. Compared with the longest sweep and perforation record well in Asia - the Jiaofei 44-Z5HF well of Sinopec, this well has a higher water-vertical ratio and a more complex wellbore trajectory. After fracturing, there were residual bridge plugs, coal blocks and a large amount of quartz sand in the wellbore. The theoretical simulation showed that the continuous pipe was difficult to reach the bottom of the well, and the operation faced multiple technical problems such as the pipe column being prone to self-locking during lowering and the sand flushing and perforation being prone to getting stuck.

为突破这一技术瓶颈，煤层气公司推动作业理念由传统扫塞向高效井筒清洁转型，集成应用减阻工艺与动态清砂工艺，配合高低黏度冲砂液交替使用，精准适配煤岩气井复杂工况的需求，大幅提高扫塞效能与井筒清洁质量，成功破解管柱自锁下入难题，顺利完成3036米水平段井筒作业，打通了气井产能释放的“任督二脉”。

To break through this technical bottleneck, the coalbed methane company has promoted the transformation of the operation concept from traditional sweeping and blocking to efficient wellbore cleaning. It has integrated the application of drag reduction technology and dynamic sand cleaning technology, combined with the alternating use of high and low viscosity sand flushing fluids, precisely adapting to the complex working conditions of coal and gas wells, significantly improving the sweeping efficiency and wellbore cleaning quality. It successfully solved the problem of self-locking of the pipe string during lowering, successfully completed the wellbore operation of the 3036-meter horizontal section, and opened up the "meridians" for the release of the gas well's production capacity.

此次突破填补了超长水平段煤岩气井压裂后井筒清洁技术的空白，为后续更长水平段煤岩气井规模高效开发提供了坚实支撑。

This breakthrough has filled the gap in the technology for cleaning the wellbore after fracturing in ultra-long horizontal coal and rock gas wells, providing a solid foundation for the large-scale and efficient development of subsequent longer horizontal coal and rock gas wells.