Statement and analysis of requirements to the metrological support of the information and measuring system of gas metering system

Abstract

The use of information and measurement systems in the oil and gas industry helps to improve the commercial gas consumption metering supplied to consumers in order to ensure mutual settlements with consumers. Gas distribution stations (GDS) are one of the main objects of main gas pipelines. Gas distribution stations are designed to perform the following operations: receiving gas from the main gas pipeline; gas purification from mechanical impurities; decrease in pressure to a predetermined value; automatic maintenance of pressure at a given level; distribution of gas to consumers; measuring the amount of gas. In addition, secondary odorization of gas is carried out at the gas distribution station. Regardless of the throughput, the number of consumers, the inlet and outlet pressure, the nature of the load change (gas consumption), the process flow diagram of the gas distribution station consists of the following main units: the connection diagram of the gas distribution station to the gas pipelines, gas purification, pressure regulation, gas flow measurement and instrumentation devices (instrumentation), gas odorization. The unit for measuring the flow rate and amount of natural gas (hereinafter referred to as the gas metering unit) is designed to measure, record the measurement results and calculate the volume of gas reduced to standard conditions, as well as, if necessary, determine its quality indicators, including component composition, density, humidity, specific heat of combustion. Various types of flow meters were analyzed and an ultrasonic flow meter was selected.

Keywords

• information and measuring system
• gas distribution station
• gas metering unit
• flow meter
• gas flow measurement