Modeling of Slug Dissipation and Generation in a Hilly-Terrain Pipeline

2001 ◽  
Author(s):  
Hong-Quan Zhang ◽  
Eissa M. Al-Safran ◽  
Subash S. Jayawardena ◽  
Clifford L. Redus ◽  
James P. Brill
Keyword(s):  
Flow Rate ◽  
Slug Flow ◽  
Liquid Flow Rate ◽  
Control Volume ◽  
Unit Length ◽  
Experimental Measurements ◽  
Hilly Terrain ◽  
Gas Liquid Flow ◽  
Flow Experiences ◽  
Good Agreement

Abstract Hilly-terrain pipelines consist of interconnected horizontal, uphill and downhill sections. Slug flow experiences a transition from one state to another as the pipe inclination angle changes. Normally, slugs dissipate if the upward inclination becomes smaller or the downward inclination becomes larger, and slug generation occurs vice versa. Appropriate prediction of the slug characteristics is crucial for the design of pipeline and downstream facilities. In this study, slug dissipation and generation in a valley pipeline configuration (horizontal-downhill-uphill-horizontal) were modeled by use of the method proposed by Zhang et al. [1]. The method was developed from the unsteady continuity and momentum equations for slug flow by considering the entire film zone as the control volume. Computed results are compared with experimental measurements at different gas-liquid flow rate combinations. Good agreement is observed for the change of slug body length to slug unit length ratio.

Modeling of Slug Dissipation and Generation in Gas-Liquid Hilly-Terrain Pipe Flow

2003 ◽  
Vol 125 (3) ◽  
pp. 161-168 ◽  
Author(s):  
Hong-Quan Zhang ◽  
Eissa M. Al-Safran ◽  
Subash S. Jayawardena ◽  
Clifford L. Redus ◽  
Cem Sarica ◽  
...  
Keyword(s):  
Pipe Flow ◽  
Slug Flow ◽  
Control Volume ◽  
Unit Length ◽  
Mineral Oil ◽  
Hilly Terrain ◽  
Two Phase ◽  
Oil Flow ◽  
Flow Experiences ◽  
Good Agreement

Hilly-terrain pipelines consist of interconnected horizontal, uphill and downhill sections. Slug flow experiences a transition from one state to another as the pipe inclination angle changes. Normally, slugs dissipate if the upward inclination becomes smaller or the downward inclination becomes larger, and slug generation occurs vice versa. Appropriate prediction of the slug characteristics is crucial for the design of pipeline and downstream facilities. In this study, slug dissipation and generation in a valley pipeline configuration (horizontal-downhill-uphill-horizontal) were modeled by use of the method proposed by Zhang et al. The method was developed from the unsteady continuity and momentum equations for two-phase slug flow by considering the entire film zone as the control volume. Computed results are compared with experimental measurements at different air-mineral oil flow rate combinations. Good agreement is observed for the change of slug body length to slug unit length ratio.

Determination of Entrained Fraction in Vertical Annular Gas/Liquid Flow

1999 ◽  
Vol 122 (1) ◽  
pp. 146-150 ◽  
Author(s):  
Barry J. Azzopardi ◽  
Sohail H. Zaidi
Keyword(s):  
Flow Rate ◽  
Liquid Flow ◽  
Annular Flow ◽  
Flow Model ◽  
Liquid Flow Rate ◽  
Measured Concentration ◽  
Diameter Pipe ◽  
A New Technique ◽  
Gas Liquid Flow

A new technique for the measurement of drop concentration in annular gas/liquid flow is presented. This is based on scattering of light by the drops. From the measured concentration, entrained liquid flow rate and thence the entrained fraction can be determined. The technique has been employed to obtain new data for vertical upward annular flow in a 0.038 m diameter pipe. The results have been compared with data from different pipe diameters and with the predictions of an annular flow model. [S0098-2202(00)02201-X]

Research on Gas-liquid Flow Rate Optimization in Foam Drilling

2010 ◽  
Author(s):  
B. K. Gao ◽  
D. G. Sun ◽  
Z. G. Jia ◽  
Z. Q. Huang ◽  
Liejin Guo ◽  
...  
Keyword(s):  
Flow Rate ◽  
Liquid Flow ◽  
Liquid Flow Rate ◽  
Gas Liquid Flow ◽  
Rate Optimization ◽  
Foam Drilling

scholarly journals S083014 Influence of gas-liquid flow rate on flow structure in a venturi scrubber

2013 ◽  
Vol 2013 (0) ◽  
pp. _S083014-1-_S083014-5
Author(s):  
Naoki HORIGUCHI ◽  
Hiroyuki YOSHIDA ◽  
Shin-ichiro UESAWA ◽  
Akiko KANEKO ◽  
Yutaka ABE
Keyword(s):  
Flow Structure ◽  
Flow Rate ◽  
Liquid Flow ◽  
Liquid Flow Rate ◽  
Venturi Scrubber ◽  
Gas Liquid Flow

A Slug Damper for Compact Separators

2002 ◽  
Author(s):  
Gene E. Kouba
Keyword(s):  
Flow Rate ◽  
Liquid Flow ◽  
Slug Flow ◽  
Dynamic Range ◽  
Liquid Flow Rate ◽  
Careful Consideration ◽  
The Body ◽  
Preliminary Results ◽  
Flow Fluctuations ◽  
Short Period

A common concern with the reduced capacity of compact gas/liquid separators, such as the GLCC©, is that flow fluctuations are passed through the separator with little dampening. Rate sensitive devices, e.g., meters, hydrocyclones, etc., located downstream of the compact separator often have a desired turn-down of less than 10 to 1. However, in slug flow, the instantaneous liquid flow rate in the body of a slug can easily exceed 10 times the average liquid flow rate, with a dynamic range closer to 100 to 1. Consequently, use of the GLCC requires careful consideration of the downstream systems and their susceptibility to flow fluctuations. The slug damper was developed to reduce the magnitude of short period flow fluctuations by providing an inexpensive way of increasing liquid retaining capacity of the inlet piping to the GLCC. These preliminary results show that the slug damper system does indeed dramatically reduce exiting flow rate fluctuations from incoming slug flow. Furthermore, the slug damper performed in a predictable manner with no observed instabilities or unusual operation modes.

scholarly journals Gas–Liquid Flow Rate Measurement Using a Twin-Plane Capacitive Sensor and a Venturi Meter

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 135933-135941 ◽  
Author(s):  
Aluisio Do N. Wrasse ◽  
Dalton Bertoldi ◽  
Eduardo N. Dos Santos ◽  
Rigoberto E. M. Morales ◽  
Marco J. Da Silva
Keyword(s):  
Flow Rate ◽  
Liquid Flow ◽  
Liquid Flow Rate ◽  
Capacitive Sensor ◽  
Twin Plane ◽  
Rate Measurement ◽  
Flow Rate Measurement ◽  
Gas Liquid Flow

Low-power micro-fabricated liquid flow-rate sensor

2015 ◽  
Vol 7 (9) ◽  
pp. 3981-3987 ◽  
Author(s):  
Wen-Chi Lin ◽  
Mark A. Burns
Keyword(s):  
Low Power ◽  
Water Flow ◽  
Flow Rate ◽  
Liquid Flow ◽  
Liquid Flow Rate ◽  
Experimental Results ◽  
Flow Sensors ◽  
Flow Rates ◽  
Rate Sensor ◽  
Good Agreement

We have constructed micro-fabricated flow sensors that can measure water flow rates of 0.1 to 2.0 gallons per minute (GPM), and the experimental results we obtained are in good agreement with those from COMSOL simulations.

Investigation of Gas-Liquid Flow Using Electrical Resistance Tomography and Wavelet Analysis Techniques for Early Kick Detection

2021 ◽  
Author(s):  
Abinash Barooah ◽  
Muhammad Saad Khan ◽  
Mohammad Azizur Rahman ◽  
Abu Rashid Hasan ◽  
Kaushik Manikonda ◽  
...  
Keyword(s):  
Flow Rate ◽  
Liquid Flow ◽  
Electrical Resistance ◽  
Liquid Flow Rate ◽  
Volume Fraction ◽  
Gas Kick ◽  
Input Pressure ◽  
Gas Volume Fraction ◽  
Gas Liquid Flow ◽  
Gas Volume

Abstract Gas kick is a well control problem and is defined as the sudden influx of formation gas into the wellbore. This sudden influx, if not controlled, may lead to a blowout problem. An accidental spark during a blowout can lead to a catastrophic oil or gas fire. This makes early gas kick detection crucial to minimize the possibility of a blowout. The conventional kick detection methods such as the pit gain and flow rate method have very low sensitivity and are time-consuming. Therefore, it is required to identify an alternative kick detection method that could provide real-time readings with higher sensitivity. In this study, Electrical Resistance Tomography (ERT) and dynamic pressure techniques have been used to investigate the impact of various operating parameters on gas volume fraction and pressure fluctuation for early kick detection. The experiments were conducted on a horizontal flow loop of 6.16 m with an annular diameter ratio of 1.8 for Newtonian fluid (Water) with varying pipe inclination angle (0–10°) and annulus eccentricity (0–30%), liquid flow rate (165–265 kg/min), and air input pressure (1–2 bar). The results showed that ERT is a promising tool for the measurement of in-situ gas volume fraction. It was observed that the liquid flow rate, air input pressure and inclination has a much bigger impact on gas volume fraction whereas eccentricity does not have a significant influence. An increase in the liquid flow rate and eccentricity by 60% and 30% decreased the gas volume fraction by an average of 32.8% and 5.9% respectively, whereas an increase in the inclination by 8° increased the gas volume fraction by an average 42%. Moreover, it was observed that the wavelet analysis of the pressure fluctuations has good efficacy for real-time kick detection. Therefore, this study will help provide a better understanding of the gas-liquid flow and potentially provide an alternative method for early kick detection.

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