Study on application of wet gas metering technology in shale gas measurement
Introduction
In natural gas industry, the production of natural gas from a well is always accompanied by water and hydrocarbons. This unprocessed output from gas well is called wet gas, and it is a particular subset of gas-liquid two phase flow. Now, there is no unanimous definition of wet gas in industry, various methods have been used to define and even to classify the wet gas, and it is most commonly defined as the Lockhart-Martinelli parameter is less than or equal to 0.3 [1,2]. Because of the presence of liquid in the gas flow, single phase gas flow meters fail to work or even damaged when expose to wet gas flows. Nowadays, separation technology is commonly applied in the wet gas flow measurement in China.
Section snippets
Flow conditions of shale gas wellhead and the demand of wet gas flow metering
Compared with the conventional extraction of natural gas, there is no water or light hydrocarbon output produced from the shale gas reservoir. However, in the process of shale gas exploitation, unconventional hydraulic fracturing technology is used to stimulate the reservoir, quantities of fracturing fluid are injected into the reservoir. As a result, a large amount of fracturing fluid generated in the shale gas in the process of shale gas extraction. The exploitation of shale gas can generally
Basic principles and technical features of current wet gas flow meters
The wet gas flow meter technology is a new metering technology developed based on single phase flow meters with correlation in recent few decades. The core principle of the wet gas flow meter is using the wet gas correlation created based on large amount of experiment data to correct the meter bias caused by liquid phase in the gas flow [3,4]. Most of the available wet gas meters are based on some sort of differential pressure device with wet gas correlations and incorporate some other
Wet gas flow test facility and the test method
In order to study the performance of wet gas flow meter at the conditions of wet natural gas flow, a wet gas flow meter was tested at the wet gas test facility of Chengdu Verification Branch of National oil and gas large flow rate measurement station of China.
This facility is designed for gas-liquid two phase flow studies consisting of water and natural gas. The schematic diagram of the wet gas test facility of CVB is shown Fig. 1, Fig. 2. This facility is mainly composed of gas and liquid
Conclusions and suggestions
It can be seen from the performance test and re-test after calibration that the metering principles and methods of the current wet gas flow meters are feasible, however, the wet gas correlations of the wet gas flow meter must be re-calibrated with wet natural gas according to the working conditions. Uncertain deviation will occur when the wet gas flow meters that calibrated using air and water at low pressure are directly used at wet natural gas flow, which cannot meet the needs of field
CRediT authorship contribution statement
Qiang Zhang: Writing - original draft, Formal analysis, Writing - review & editing. Dingfa Liu: Data curation, Investigation.
Declaration of competing interest
We wish to draw the attention of the Editor to the following facts which may be considered as potential conflicts of interest and to significant financial contributions to this work.
We confirm that the manuscript has been read and approved by all named authors and that there are no other persons who satisfied the criteria for authorship but are not listed. We further confirm that the order of authors listed in the manuscript has been approved by all of us.
We confirm that we have given due
Acknowledgments
The authors gratefully acknowledge Petrochina for funding the research and CVB staffs who were involved in the wet gas flow facility construction and wet gas flow test.
References (11)
Horizontally installed cone differential pressure meter wet gas flow performance
J. Flow Meas. Instrum.
(2009)- et al.
Performance of a horizontally mounted Venturi in low-pressure wet gas flow
Chin. J. Chem. Eng.
(2008) Orifice plate meter wet gas flow performance
J. Flow Meas. Instrum.
(2009)- et al.
“A new model for volume fraction measurements of horizontal high-pressure wet gas flow using gamma-based techniques”
Exp. Therm. Fluid Sci.
(2018) - et al.
“A combination method for metering gas–liquid two-phase flows of low liquid loading applying ultrasonic and Coriolis flowmeters”
Flow Meas. Instrum.
(2014)
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