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According to Tianjin University, the condensate natural gas two-phase flowmeter independently developed by the school has been used for more than 90 million yuan in the application of PetroChina Southwest Oil and Gas Field Branch for four years, greatly reducing the cost of one-time infrastructure investment. This technology is safe and radiation-free, has reached the international advanced level, fills the domestic gap, and is expected to be promoted in the field of natural gas exploitation in China.
China's demand for clean energy such as natural gas has increased year by year. Unlike pure dry natural gas that enters the homes of ordinary people, natural gas is called condensate natural gas when it is just mined at the wellhead. It is a kind of moisture. The moisture is first measured and then entered into the treatment plant. Moisture is a special gas-liquid two-phase flow with less gas and more liquid. The flow pattern includes various forms such as stratification, wave, ring, and mist, so the detection is very difficult.
At present, the moisture in the production process of the oil and gas industry is mainly measured by gas-liquid separation. In order to obtain natural gas flow data, the gas field well group needs to set up high-pressure pipelines of several kilometers or ten kilometers, and build thousands of square meters of gas collection and measurement stations, with an average cost of tens of millions. The metering station needs to separate the moisture into two parts, gas and liquid, in order to obtain the measurement results.
The condensed natural gas two-phase flowmeter of Tianjin University realizes the gas and liquid two-phase flow of natural gas produced at the wellhead without online separation and measurement, and the gas and liquid flow can be measured in real time. The flowmeter covers an area of ​​about 1 square meter, and the price is only a fraction or even one tenth of the price of similar foreign products suitable for onshore gas fields. It can replace imports and greatly reduce the cost and manpower of one-time infrastructure investment. Management costs.
The technology grasps the production dynamic information of single wells, well areas, gas reservoirs and gas fields in a timely, accurate and long-term manner, judges the production changes and water intrusion conditions of gas wells and gas reservoirs, optimizes the production gas production process, and prolongs the production life of gas wells. It is of great practical significance to improve the recovery of gas fields and protect the geological environment.
According to Xu Ying, associate professor of the Department of Automation, School of Electrical and Automation Engineering, Tianjin University, from 2007, Tianjin University has conducted research on the research and application of multi-parameter dynamic measurement technology for condensate gas. The research results of the project have been granted 5 patents. And successfully industrialized, developed the corresponding corporate standards, passed the third-party form evaluation, obtained the license of manufacturing measuring instruments in the People's Republic of China, and published more than 20 papers.
At the beginning of 2010, the technology was applied to the major demonstration project of China Petroleum Oil and Gas Field Standardization Design, and was applied in the Chuanzhong and Weinan oil and gas mines of the Southwest Oil and Gas Field Branch. By the end of 2013, more than 1,500 logging tasks had been completed. In 2013, due to the application of new technologies, 50 well groups have been unattended, realizing single-gas gas-liquid mixed transportation, saving large gas-liquid separators, greatly simplifying the process equipment and station management of gas field well groups. , achieved significant economic and social benefits.
In the first half of this year, the project “Research and Application of Multi-parameter Dynamic Measurement Technology for Condensed Natural Gas†won the first prize of “2013 China Metrology and Testing Society Science and Technology Progress Awardâ€.
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