A New Approach for Accurate Prediction of Liquid Loading of Directional Gas Wells in Transition Flow or Turbulent Flow

Ming, Ruiqing; He, Haiyan

doi:10.1155/2017/4969765

Cited by 5 publications

(5 citation statements)

References 17 publications

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“…Wenming Yang et al 46 established a calculation model of gas critical liquid‐carrying flow rate with high gas‐liquid ratio in directional gas wells based on the relationship between well deviation angle, drag coefficient and Reynolds number. Ruiqing Ming et al 47 considered the influence of directional well inclination angle and Reynolds number on gas liquid carrying, and established a calculation model of gas critical liquid‐carrying flow rate for continuous liquid carrying in transitional and turbulent flow.…”

Section: Analysis Of the Current Situation Of Gas Critical Liquid Car...mentioning

confidence: 99%

“…After adjusting coefficients, this model is widely used in liquid accumulation prediction at existing oil and gas well sites 5–7 . However, for gas wells with low pressure and low production, such as the Sulige Gas Field, the on‐site gas phase is mostly in a turbulent state, and the calculation using the Turner model has a large deviation 8,9 . In the low‐permeability water‐producing gas reservoir in the Daniudi gas field, widely used models such as the Turner model and the Min Li model have an average accuracy rate of predicting liquid accumulation in gas wells below 70% 10 .…”

Section: Introductionmentioning

confidence: 99%

“…[5][6][7] However, for gas wells with low pressure and low production, such as the Sulige Gas Field, the on-site gas phase is mostly in a turbulent state, and the calculation using the Turner model has a large deviation. 8,9 In the low-permeability waterproducing gas reservoir in the Daniudi gas field, widely used models such as the Turner model and the Min Li model have an average accuracy rate of predicting liquid accumulation in gas wells below 70%. 10 In the gas wells of the Zhongjiang gas field, condensate water is the main source and the water vapor is low, so it is difficult to use the Turner model.…”

Section: Introductionmentioning

confidence: 99%

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Research progress on the calculation model of critical liquid carrying flow of gas well

Zheng,

Li,

Dou

et al. 2023

Energy Science & Engineering

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The accumulation of liquid in gas wells has become a prevalent problem in the middle and later stages of gas well development with different wellbore structures, which seriously affects the production efficiency of gas wells. To precisely forecast the generation time of liquid accumulation in gas wells and timely adopt drainage gas production technology, the literatures on gas critical liquid‐carrying flow calculation models for vertical wells, inclined wells and horizontal wells were analyzed and summarized. The results show that the research on the calculation models for gas critical liquid‐carrying flow rate in vertical and inclined wells is relatively mature. However, because of the unique wellbore structure of horizontal wells, the gas‐liquid two‐phase flow pattern and distribution of droplets and liquid‐film are complex, leading to a lack of understanding of gas liquid carrying mechanism throughout the whole wellbore of existing horizontal wells, and we established a calculation model of gas critical liquid‐carrying flow rate in horizontal wells considers single factors. Based on the above summary and analysis, the research direction of the calculation model for gas critical liquid‐carrying flow rate in the entire wellbore of horizontal wells is pointed out. Combining the gas liquid‐carrying test of entire wellbore of the horizontal well, considering the distribution form of droplets and liquid‐film, the aggregation and fission between droplets, and the energy exchange between gas and liquid, the gas liquid‐carrying mechanism of the entire wellbore of horizontal well is revealed, clarifying the most easy to liquid‐accumulating well sections in the whole horizontal well, and a calculation model of gas critical liquid‐carrying flow rate of horizontal well considering multiple factors is established, providing crucial theoretical foundation and technical support for the drainage and gas recovery of a horizontal well.

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Section: Analysis Of the Current Situation Of Gas Critical Liquid Car...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Research progress on the calculation model of critical liquid carrying flow of gas well

Zheng,

Li,

Dou

et al. 2023

Energy Science & Engineering

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“…Their model was reported to outperform both Turner and Belfroid models. Ming & He (2017) performed an experiment in deviated and horizontal wells. They reported that film will be formed in such wells and that the film will drop down in the tubing to initiate loading.…”

Section: Introductionmentioning

confidence: 99%

An Improved Model for the Prediction of Liquid Loading in gas Wells using Firefly and Particle Swarm Optimization Algorithms

Ehinmowo¹,

Adeboye²,

Aliyu³

2022

Nig. J. Technol. Dev.

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Liquid loading is an undesired phenomenon in gas wells that occurs when producing wells attain a flow rate below which liquid will not be able to flow to the surface. The inability of the energy from the gas to transport the liquid to the surface causes back flow and eventual accumulation of liquid at the wellbore. This is characterised by intermittent flow, which, if left unchecked, can eventually kill the well. An effective and reliable predictive method must therefore, be employed. In this study, improved models based on data set from condensate/water in a gas well were developed by applying firefly (FA) and particle swarm optimisation (PSO) algorithms. The results showed that the model developed out perform many of the existing models. The models predicted liquid loading in gas well at 86% level of accuracy compared to the 81% highest possible from published models. Although, the FA and PSO models predicted liquid loading at higher accuracy compared with Turner and Coleman models for higher wellhead pressure systems, the Coleman model appeared to perform better in the prediction of critical gas rate for low-pressure systems. However, the developed model can significantly improve the prediction of liquid loading in gas wells at a higher reliability and accuracy levels. Thus, the proposed models can be a veritable tool for accurately predicting liquid loading in gas wells.

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“…However, as the gas reservoir depletes, the gas velocity decreases [1], the formation pressure attenuates, and the temperature decreases, so that the gas cannot carry the formation liquid out of the wellbore. This phenomenon is called liquid loading of gas wells [2][3][4]. Geng et al also pointed out that the discontinuity of gas is the fundamental cause of gas-well effusion [5], so it is easy to form effusion in the middle and late stage of gas-well production.…”

Section: Introductionmentioning

confidence: 99%

Research on Critical Liquid-Carrying Model in Wellbore and Laboratory Experimental Verification

Hou

Wang

et al. 2021

Processes

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Liquid loading in gas wells may slash production rates, shorten production life, or even stop production. In order to reveal the mechanism of liquid loading in gas wells and predict its critical flowrates, theoretical research and laboratory experiments were conducted in this work. A new model of liquid-film reversal was established based on Newton’s law of internal friction and gas–liquid two-phase force balance, with the critical reverse point obtained using the minimum gas–liquid interface shear force method. In this model, the influences of the pipe angle on the liquid film thickness were considered, and the friction coefficient of the gas–liquid interface was refined based on the experimental data. The results showed that the interfacial shear force increases by increasing the liquid superficial velocity, which leads first to an increase of the critical liquid-carrying gas velocity and then to a decrease, and the critical production also decreases. With 0° as the vertical position of the pipeline and an increase of the inclination angle, the critical liquid-carrying velocity first increases and then decreases, and the maximum liquid-carrying velocity appears in the range of 30–40°. In addition, the critical liquid-carrying gas velocity is positively correlated with the pipe diameter. Compared with the previous model, the model in this work performed better considering its prediction discrepancy with experiment data was less than 10%, which shows that the model can be used to calculate the critical liquid-carrying flow rate of gas wells. The outcome of this work provides better understanding of the liquid-loading mechanism. Furthermore, the prediction model proposed can provide guidance in field design to prevent liquid loading.

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A New Approach for Accurate Prediction of Liquid Loading of Directional Gas Wells in Transition Flow or Turbulent Flow

Cited by 5 publications

References 17 publications

Research progress on the calculation model of critical liquid carrying flow of gas well

Research progress on the calculation model of critical liquid carrying flow of gas well

An Improved Model for the Prediction of Liquid Loading in gas Wells using Firefly and Particle Swarm Optimization Algorithms

Research on Critical Liquid-Carrying Model in Wellbore and Laboratory Experimental Verification

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