An intelligent approach for calculating natural gas compressibility factor and its application in ultrasonic flow meters

2020 ◽  
Vol 76 ◽  
pp. 101833
Author(s):  
Mahmood Farzaneh-Gord ◽  
Hamid Reza Rahbari
Keyword(s):  
Natural Gas ◽  
Compressibility Factor ◽  
Flow Meters ◽  
Intelligent Approach ◽  
Gas Compressibility

Calculation Method of Natural Gas Compressibility Factor and its Application in Pipeline Trade

2014 ◽  
Author(s):  
Xiaocui Tian ◽  
Xiaokai Xing ◽  
Rui Chen ◽  
Shubao Pang ◽  
Liu Yang
Keyword(s):  
Natural Gas ◽  
Compressibility Factor ◽  
Economic Benefits ◽  
Ideal Gas ◽  
Operating Conditions ◽  
Pipeline System ◽  
Natural Gas Pipeline ◽  
Gas Volume ◽  
Gas Compressibility ◽  
Simplified Formula

In the custody transfer metering of natural gas, it’s necessary to transform gas volume from metering state into standard state. Natural gas is non-ideal gas, and its compressibility factor varies with different components, temperature and pressure. So the accuracy of its calculation has direct impact on that of natural gas metering, and then affects the economic benefits of the enterprise [1]. According to related standard of China, in the custody transfer metering of natural gas, the formula stipulated by AGA NO.8 should be adopted to calculate compressibility factor. But the components of natural gas must be monitored at all times when this method is used, and the calculation process is complicated. In practical operation of natural gas trade, compressibility factor changes because of frequent adjustment of pipeline operating conditions. In order to simplify the calculation, simplified formula is applied to calculate compressibility factor generally, but it’s difficult to guarantee the accuracy at the same time. In this paper, the simplified formula, which is used for calculating natural gas compressibility factor of a joint-stock natural gas pipeline of CNPC, is modified with the standard formula stipulated by AGA NO.8. After the modification, an empirical formula of compressibility factor calculation applicable to this pipeline system is proposed, whereby the accuracy of compressibility factor calculation is improved. When the modified one is applied to natural gas trade, the accuracy of metering is improved likewise.

scholarly journals THE INFLUENCE OF PRESSURE AND TEMPERATURE ON THE COMPRESSIBILITY FACTOR

2021 ◽  
Vol 2(73) (2) ◽  
pp. 13-21
Author(s):  
George Iulian Oprea ◽  
◽  
Artemis Aidoni ◽  
Ioana Cornelia Mitrea ◽  
Florinel Dinu ◽  
...  
Keyword(s):  
Natural Gas ◽  
Entire Range ◽  
Compressibility Factor ◽  
Ideal Gas ◽  
Calculation Methods ◽  
Natural Gases ◽  
Canadian Association ◽  
Compression And Expansion ◽  
Gas Compressibility ◽  
Reduced Pressures

The natural gas compressibility factor indicates the compression and expansion characteristics of natural gas under different conditions. It is a thermodynamic property used to take into account the deviation of the behaviour of real natural gases from that of an ideal gas. Compressibility factor, Z, values of natural gases are necessary for most petroleum gas engineering calculations. In this study, a comparison between five different calculation methods is presented to determine this critical parameter for the same natural gas at different conditions (pressure and temperature), using Canadian Association of Petroleum Producers, Azizi, Behbahani and Isazadeh, Dranchuk- Purvis- Robinson, Dranchuk-Abu-Kassem and Standing- Katz methods. The correlations are based on the equation of state are often implicit because they require iteration. Many correlations have been derived to enhance simplicity; however, no correlation has been developed for the entire range of pseudo-reduced pressures and temperatures. Azizi, Behbahani and Isazadeh’s method was found to have the biggest error as a result obtained for T=20° C, and p=20 bar is no longer in the field of applicability.

Measurement and calculation of gas compressibility factor for condensate gas and natural gas under pressure up to 116MPa

2013 ◽  
Vol 63 ◽  
pp. 38-43 ◽  
Author(s):  
Ke-Le Yan ◽  
Huang Liu ◽  
Chang-Yu Sun ◽  
Qing-Lan Ma ◽  
Guang-Jin Chen ◽  
...  
Keyword(s):  
Natural Gas ◽  
Compressibility Factor ◽  
Gas Compressibility

scholarly journals Modeling Natural Gas Compressibility Factor Using a Hybrid Group Method of Data Handling

2019 ◽  
Author(s):  
Abdolhossein Hemmati-Sarapardeh ◽  
Sassan Hajirezaie ◽  
Mohamad Reza Soltanian ◽  
Amir Mosavi ◽  
Shahab Shamshirband
Keyword(s):  
Natural Gas ◽  
Equations Of State ◽  
Compressibility Factor ◽  
Absolute Error ◽  
Group Method ◽  
Data Handling ◽  
Hydrocarbon Reservoir ◽  
Compression And Expansion ◽  
Natural Gas Transport ◽  
Gas Compressibility

A Natural gas is increasingly being sought after as a vital source of energy, given that its production is very cheap and does not cause the same environmental harms that other resources, such as coal combustion, do. Understanding and characterizing the behavior of natural gas is essential in hydrocarbon reservoir engineering, natural gas transport, and process. Natural gas compressibility factor, as a critical parameter, defines the compression and expansion characteristics of natural gas under different conditions. In this study, a simple second-order polynomial model based on the group method of data handling (GMDH) is presented to determine the compressibility factor of different natural gases at different conditions, using corresponding state principles. The accuracy of the model evaluated through graphical and statistical analyses. The results show that the model is capable of predicting natural gas compressibility with an average absolute error of only 2.88%, a root means square of 0.03, and a regression coefficient of 0.92. The performance of the developed model compared to widely known, previously published equations of state (EOSs) and correlations, and the precision of the results demonstrates its superiority over all other correlations and EOSs.

Rapidly Estimating Natural Gas Compressibility Factor

2007 ◽  
Vol 16 (4) ◽  
pp. 349-353 ◽  
Author(s):  
Alireza Bahadori ◽  
Saeid Mokhatab ◽  
Brian F. Towler
Keyword(s):  
Natural Gas ◽  
Compressibility Factor ◽  
Gas Compressibility

A novel correlation approach for prediction of natural gas compressibility factor

2010 ◽  
Vol 19 (2) ◽  
pp. 189-192 ◽  
Author(s):  
Ehsan Heidaryan ◽  
Amir Salarabadi ◽  
Jamshid Moghadasi
Keyword(s):  
Natural Gas ◽  
Compressibility Factor ◽  
Gas Compressibility
Sign in / Sign up

Export Citation Format

Share Document