Jinda condensate natural gas two-phase flowmeter to achieve online non-separation measurement

In the final of the 2nd Jiangsu Science and Technology Entrepreneurship Competition, the “Gas and Oil Well Online Gas-Liquid Two-Phase Metering Equipment” project brought by the Tianjin University team filled the gap with low-cost high-tech to meet the oilfield production needs. The third prize of the competition entrepreneur team was a good result.

In recent years, in order to protect the environment, the domestic demand for clean energy such as natural gas has increased year by year. During the 12th Five-Year Plan period, the proportion of natural gas in primary energy consumption will increase from 4% to 8%. However, the gas-liquid two-phase online measuring equipment that does not separate the wellhead in the oil and gas field is still in a blank state. In the final of the 2nd Jiangsu Science and Technology Entrepreneurship Competition, the “Gas and Oil Well Online Gas-Liquid Two-Phase Metering Equipment” project brought by the Tianjin University team filled the gap with low-cost high-tech to meet the oilfield production needs. The third prize of the competition entrepreneur team was a good result.

"Don't be a small meter with a footprint of only 1 square meter! It can replace a gas metering station commonly used in oil and gas fields." Project leader and angel investor Song Xianzhong said that natural gas has just been mined at the wellhead. gas. 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, build thousands of square meters of gas collection and measurement stations, and separate the moisture into gas and liquid to obtain the measurement results. On average, each metering station costs tens of millions of yuan.

The condensate natural gas two-phase flowmeter independently developed by Tianjin University has been applied for 4 years in the Southwest Oil and Gas Field Branch of PetroChina, with an economic benefit of more than 90 million yuan. It has recently won the first prize of the “2013 China Metrology and Testing Society Science and Technology Progress Award”. The technology is safe and radiation-free, has reached the international advanced level, and has filled the domestic gap. It is expected to be promoted in the field of natural gas exploitation in China, promote the effective development and utilization of clean energy in China, and achieve sustainable development.

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, the project leader and associate professor of the Department of Automation, School of Electrical and Automation Engineering, Tianjin University, since 2007, Tianjin University has been conducting research on the “Research and Application of Multi-parameter Dynamic Measurement Technology for Condensed Natural Gas”, which has been awarded 863 projects and countries by the Ministry of Science and Technology. Funding for the Natural Science Foundation and the Tianjin Science and Technology Project. The research results of the project have been granted 5 patents, and successfully industrialized, and the corresponding enterprise standards have been formulated. The third-party formal evaluation has been obtained, and the license for manufacturing measuring instruments has been obtained in the People's Republic of China, and more than 20 papers have been published. At the beginning of 2010, the technology was applied to the PetroChina oil and gas field standardization design demonstration project, and applied to 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 implemented unattended, realizing single-gas gas-liquid mixed transmission, saving large gas-liquid separators.

In the first half of this year, the “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 Award”. The award is organized by the China Society for Metrology and Testing, registered at the National Awards Office, and is a social strength award with the qualification of a recommended national award. The China Society for Metrology and Testing is a first-level society. In 2013, there were more than 120 national declaration projects. After scientific and rigorous online initial evaluation, conference re-evaluation and final review of the defense, 8 first-class awards were finally awarded, accounting for 6% of the declared projects.

Song Xianzhong said that since the beginning of the preliminary research and theoretical research in 2004, this project can be described as "a decade of grinding a sword." At present, with its unique design and core technology, the equipment has reached the international advanced standards in terms of precision; there is no radiation in safety; in the price, each set only needs 200,000-800,000 yuan, which is one-fifth of similar equipment abroad.

It is reported that from December 2012 to July 2014, the condensate natural gas two-phase flowmeter has been operating normally for more than 550 days in the Tarim Yingmaili gas field Yingying 7 gas metering station. In the past four years, the application of PetroChina Southwest Oil and Gas Field Branch has yielded more than 90 million yuan in economic benefits. However, Song Xianzhong admits that the project has not yet been operated and mass produced in the form of a company. “This time I participated in the 2nd Jiangsu Science and Technology Entrepreneurship Competition, one wanted to use the competition opportunity to promote the project, and the other was to hope to get valuable suggestions from the professional judges for future operation and development.” Song Xianzhong said that Jiangsu’s support for science and technology projects Large, entrepreneurial environment and conditions are also better. At present, the project has decided to settle in Suzhou and will be incorporated in September.

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