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Tianjin University develops natural gas two-phase flowmeter to achieve gas-liquid non-separation measurement
Tianjin University has recently announced that its independently developed condensate natural gas two-phase flowmeter has generated over 90 million yuan in economic benefits within four years of deployment at the PetroChina Southwest Oil and Gas Field Branch. This innovative technology significantly lowers the initial infrastructure investment costs, offering a safer and radiation-free alternative to traditional methods. Recognized as reaching international advanced standards, it fills a critical domestic gap and is expected to be widely adopted across China’s natural gas industry.
In natural gas production, condensate gas—also known as moisture—is the raw gas extracted directly from the wellhead. Before entering processing plants, this moisture must be measured. It represents a complex gas-liquid two-phase flow with more liquid than gas, featuring various flow patterns such as stratified, wavy, annular, and mist. Traditional measurement methods relied on gas-liquid separation, requiring extensive high-pressure pipelines and large-scale gas collection stations, often costing tens of millions of yuan per project. These systems involved separating the gas and liquid phases before obtaining accurate flow measurements, which was both time-consuming and expensive.
The Tianjin University two-phase flowmeter eliminates the need for online separation, enabling real-time measurement of both gas and liquid flows directly at the wellhead. The device occupies only about one square meter and is significantly more cost-effective than similar foreign technologies, often priced at just a fraction or even one-tenth of imported alternatives. This breakthrough not only reduces dependency on imports but also slashes infrastructure and operational costs. Additionally, it provides real-time data on well performance, helping operators monitor production dynamics, detect changes in output and water intrusion, optimize gas production, and extend the lifespan of gas wells.
Since its introduction in 2010, the technology has been implemented in major projects under China Petroleum's standardization design initiative, specifically in the Chuanzhong and Weinan oil and gas fields. By the end of 2013, over 1,500 logging tasks had been completed. The application of this new technology allowed 50 well groups to operate without personnel, enabling single-gas gas-liquid mixed transportation. This led to the elimination of large gas-liquid separators, simplifying equipment and station management. As a result, significant economic and social benefits were achieved, marking a milestone in the modernization of China’s gas industry.