Changqing Oilfield Changbei Company's Operation Area 1 TPO Well Station sees a daily production increase of 80,000 cubic meters.

"Previously, every time we conducted a TPO pigging operation, we had to coordinate with the Yulin Processing Plant to find a suitable time window. Sometimes, this coincided with overlapping tasks, forcing us to sacrifice our own production time. But after the process was adjusted, the gas produced from the TPO wells now flows directly into our own processing plant—meaning we not only avoid losing any gas volume but actually achieve increased production and efficiency. Now, we can also schedule our operations more efficiently, boosting overall on-site productivity," explained Lu Yabin, the technician in charge of the pigging作业, to the reporter. (Correspondents Jiang Yan and Duan Lingliang) "This is the first pigging operation conducted after the TPO trunk line underwent process optimization and was integrated into the North Trunk Line," said Li Yang, Manager of Operation Area 1 at Changqing Oilfield’s Changbei Company, as he briefed the author upon receiving the pig at the Yulin Terminal on April 14. "By minimizing external interference, this pigging job saved 200 hours compared to previous operations, giving us a strong advantage in seizing the prime spring production window."

　　The author has learned that for many years, natural gas produced from the aging TPO wells and several well clusters in the Changbei Gas Field has been collected via the TPO branch pipeline and routed to the Yulin Main Station, where it is supplied to Beijing through the Shaanxi-Beijing No. 1 Pipeline. However, in recent years, as exploration and development of the Yulin Gas Field have deepened, the production capacity of the older TPO wells has steadily declined. Consequently, bottlenecks related to pipeline capacity, pigging operations, and condensate processing have become increasingly apparent year by year.

　　To comprehensively enhance the gas supply capacity of the aging TPO wells and firmly maintain control over production, at the end of 2018, technical personnel from Changbei Company conducted in-depth discussions on pipeline network optimization strategies, focusing on addressing specific challenges. Starting with the on-site processes, they carefully analyzed the feasibility, significance, and effectiveness of integrating the TPO branch lines into the North trunk line—specifically, evaluating how this production process change could boost natural gas output while ensuring safe and stable operations. Additionally, they performed thorough risk assessments and implemented robust control measures to guarantee that, once the process adjustments were made, the company could not only meet its natural gas production targets but also successfully achieve the condensate oil production goals.

　　"Previously, every time we conducted a TPO pigging operation, we had to coordinate with the Yulin Processing Plant to find a suitable time window. Sometimes, this coincided with overlapping tasks, forcing us to sacrifice our own production time. But after the process was adjusted, the gas produced from the TPO wells now flows directly into our own processing plant—meaning we not only avoid losing any gas volume but actually achieve increased production and efficiency. Now, we can also schedule our operations more efficiently, boosting overall on-site productivity," explained Lu Yabin, the technician in charge of the pigging作业, to the reporter.

　　After calculations, this pipeline process optimization has resulted in an additional daily natural gas production of over 80,000 cubic meters at the TPO well station, while condensate output has also seen a significant boost, creating a favorable situation where both gas efficiency and oil recovery are thriving.