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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 use at the PetroChina Southwest Oil and Gas Field Branch. This innovative technology has significantly lowered the cost of initial infrastructure investment, offering a safer and radiation-free alternative to traditional methods. With international advanced standards, it fills a domestic gap and is expected to be widely adopted across China's natural gas industry.
In natural gas extraction, the gas produced at the wellhead is often referred to as condensate natural gas, which contains moisture. Accurate measurement of this moisture is crucial before it enters the treatment plant. However, this gas-liquid two-phase flow presents a complex challenge due to varying flow patterns such as stratified, wavy, annular, and mist-like structures. Traditionally, the industry relied on gas-liquid separation techniques, requiring extensive high-pressure pipelines and large-scale gas collection stations, costing millions per project. These systems involved separating the gas and liquid phases, making the process both time-consuming and expensive.
The new condensate natural gas two-phase flowmeter from Tianjin University eliminates the need for online separation, allowing real-time measurement of both gas and liquid flows directly at the wellhead. The device occupies just about one square meter and costs a fraction—sometimes as low as one-tenth—of similar foreign products used in onshore gas fields. This makes it a viable replacement for imported equipment, significantly reducing both capital and operational costs.
Moreover, the technology enables real-time and accurate monitoring of production dynamics across individual wells, well areas, reservoirs, and entire gas fields. It helps assess changes in gas production and water intrusion, optimize the production process, and extend the life of gas wells. Its application has great practical value in improving gas recovery rates and protecting the geological environment.
Since its introduction in early 2010, the technology was deployed in major demonstration projects under China Petroleum’s standardization design initiative, including the Chuanzhong and Weinan oil and gas fields. By the end of 2013, over 1,500 logging tasks had been completed. In 2013, thanks to the new system, 50 well groups became unattended, enabling single-gas gas-liquid mixed transportation. This eliminated the need for large gas-liquid separators, simplified the process equipment, and reduced station management efforts, resulting in substantial economic and social benefits.
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