Abstract
Natural gas measurement is an important basic job in national, social and economic development, and accurate and reliable measurement is an important guarantee for promoting the rapid development of natural gas industry in China. In this paper, the importance and characteristics of natural gas measurement were analyzed. Then, domestic and foreign natural gas measurement technologies were analyzed and compared from the aspects of measurement technological standard system, measuring instrument application technology, custody transfer metering mode in natural gas trade, measurement value traceability system and measurement management. Finally, the development of domestic natural gas flow metering technologies was summarized and predicted. And the following research results were obtained. First, natural gas measurement is a kind of large-quantity dynamic gas measurement with compressible medium, and the measurement result is derived from the flow rate, composition, temperature, pressure and other data under working conditions. Therefore, the accuracy of the measurement results cannot be guaranteed unless each basic data is measured accurately. Second, a natural gas measurement technology system has been established in China, including measurement laws and regulations, measurement technological standards and specifications, measurement value traceability technology, measuring tool application technology and measurement management system. Third, with the high-quality rapid development of domestic natural gas industry, China's natural gas measurement technology system will get improved continuously and be in line with international standards further. The guarantee for the reliability of measuring instrument may be transformed from compulsory verification to traceability based on verification or calibration, and the nationalization process of measuring tools will be sped up. In addition, the metering mode in natural gas trade will be changed greatly from volume measurement to energy measurement. In conclusion, China's natural gas measurement technology system basically guarantees the rapid development of its natural gas industry, but it still needs further improvement and completion.
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