«Equipment and technologies for oil and gas complex»

The criterion used for a qualitative assessment of the imbalance magnitude when receiving and transmitting natural gas in the gas transmission system

UDC: 622.691.4:620.9
DOI: -

Authors:

¹ National University of Oil and Gas "Gubkin University", Moscow, Russia

Keywords: gas transportation system, gas consumption, gas imbalance, measurement, mathematical model

Annotation:

One of the main parameters describing the operation of the system is the gas balance in the pipeline. A component of the gas flow balance in gas transportation organizations consists of the so-called calculation-methodological gas losses (CMGL). Given the fact that the values of CMGL can be both positive and negative, the term "imbalance" (CMGI) is more appropriate. The analysis of factors and causes of gas imbalance allows them to be divided into two groups: CMGI and actual (unaccounted) gas losses. As a rule, the cause of the imbalance cannot be determined without inspecting the specific main pipeline facility. Thus, our task is to detect the source of the imbalance, specifically to establish that its magnitude cannot be explained solely by the errors of measurement instruments and calculation methods. When performing a qualitative assessment of the magnitude of the gas imbalance in the gas transportation system, a gas imbalance criterion is used, in the calculation of which the uncertainties of each gas flow measurement instrument and the uncertainties of the calculation results of the input and output gas volumes within the boundaries of the considered system are taken into account. The solutions described in this article allow for the formation of a methodological approach to assessing the balance of gas intake and distribution in the gas transportation system, taking into account the errors of gas flow measurement instruments, errors in calculating gas consumption for internal technological needs, including technological losses, and changes in gas reserves.

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