中国石油网消息：7月12日，在长庆油田苏里格气田苏东41-53井区现场，该油田第二口CCUS-EGR（碳捕集、利用与封存-提高采收率）先导试验井试压完井合格，标志着区域致密砂岩低碳开发试验项目第一阶段钻井任务顺利完成，为致密气藏低碳高效开发、规模化碳封存利用筑牢坚实的技术根基。

China Oil News: On July 12th, at the Su Dong 41-53 well area in the Su Li Gu gas field of the Changqing Oilfield, the second CCUS-EGR (Carbon Capture, Utilization and Storage - Enhanced Oil Recovery) pilot test well in this oilfield successfully completed pressure testing and well completion. This marks the successful completion of the first phase of drilling tasks for the regional tight sandstone low-carbon development pilot project, laying a solid technical foundation for the low-carbon and efficient development of tight gas reservoirs and the large-scale utilization of carbon.

自2025年起，长庆油田在苏东区块开展CCUS-EGR先导试验，创下多项高精度技术纪录：2口新钻注采井精准完成185.1米超长目的层全井段连续取芯，取芯完整度、精准度位居国内同类致密气藏试验前列。同时，为最大程度验证技术的可靠性，夯实科研数据支撑，该油田同步联动国家实验室、中国地质大学、成都理工大学三方权威科研平台，同步开展多维度岩芯分析实验，成功验证了“以碳产气、存碳护绿”低碳开发技术的落地可行性。

Starting from 2025, the Changqing Oilfield will conduct a CCUS-EGR pilot test in the Su Dong block, achieving several high-precision technical records: Two newly drilled injection-production wells precisely completed 185.1 meters of ultra-long target layer with continuous core sampling throughout the well section. The completeness and accuracy of the core samples ranked at the forefront of similar tight gas reservoir tests in China. At the same time, in order to fully verify the reliability of the technology and strengthen the scientific research data support, the oilfield simultaneously coordinated with three authoritative scientific research platforms from the national laboratory, China University of Geosciences, and Chengdu University of Technology. They simultaneously carried out multi-dimensional core analysis experiments, successfully verifying the feasibility of the "carbon production for gas, carbon storage for greenery" low-carbon development technology.

长庆油田苏里格气田苏东区块，储层致密、地质结构复杂，开发难度居气田前列。数据显示，该区块气藏整体采收率不到30%，超过七成的天然气资源滞留在地下，难以有效开采。如何在稳产增效的同时兼顾生态环保，成为老气田可持续发展的关键命题。CCUS-EGR技术的落地应用，正是破解这一困局的关键突破口。

In the Su Dong area of the Su Ridge gas field of the Changqing Oilfield, the reservoirs are dense and the geological structure is complex, making the development extremely challenging among all gas fields. Data shows that the overall recovery rate of the gas reservoirs in this area is less than 30%, with over 70% of the natural gas resources remaining underground and difficult to be effectively extracted. How to achieve stable production and efficiency improvement while also taking into account ecological and environmental protection has become a key issue for the sustainable development of old gas fields. The implementation and application of the CCUS-EGR technology is precisely the key breakthrough to solve this predicament.

长庆油田钻井现场技术负责人刘俊解释说：“CCUS-EGR技术将二氧化碳加压转化为超临界流体，兼具气体的渗透性与液体的驱替性，如同精准注入海绵的活水，能够快速渗入岩层微小孔隙，抬升地层压力，高效驱替滞留的天然气，并实现永久地质封存。”

Liu Jun, the technical director of the drilling site in Changqing Oilfield, explained: "The CCUS-EGR technology compresses carbon dioxide and converts it into a supercritical fluid. It combines the permeability of a gas with the displacement property of a liquid, just like injecting fresh water precisely into a sponge, which can quickly penetrate the tiny pores of the rock layer, raise the formation pressure, efficiently displace the trapped natural gas, and achieve permanent geological storage."

高精准、高标准的钻井施工，离不开全方位的攻坚保障。针对该试验井工艺标准和安全性要求远高于常规气井，必须同时满足后期注气安全、长期碳封存和高效采气等多重需求，长庆油田集结地质、钻井、油气开发等多领域骨干力量，从地质选址、数值模拟、工艺优化到设施调试，实现全流程闭环管控。

Highly precise and high-standard drilling operations cannot be achieved without comprehensive support for the challenges. Given that the technical standards and safety requirements for this test well are much higher than those of conventional gas wells, it must simultaneously meet multiple demands such as safe gas injection in the future, long-term carbon sequestration, and efficient gas extraction. The Longqing Oilfield has assembled key personnel from multiple fields including geology, drilling, and oil and gas development. They have implemented a full-process closed-loop management from geological site selection, numerical simulation, process optimization to facility commissioning.

通过跨专业协同攻坚，先后攻克了致密地层取芯难、井筒工艺适配性差、碳封存安全性管控难度大等一系列行业技术难题，有效验证了CCUS-EGR技术在致密砂岩“三低”气藏的可行性。

Through cross-disciplinary collaborative efforts, a series of industry technical challenges such as the difficulty in core extraction in dense formations, poor adaptability of wellbore processes, and high difficulty in safety control of carbon sequestration were successfully overcome. This effectively verified the feasibility of the CCUS-EGR technology in "low-permeability, low-pressure, and low-reservoir" gas reservoirs.