Integrated Wellbore/Reservoir Model Predicts Flow Transients in Liquid-Loaded Gas Wells

Chupin, Gael; Hu, Bin; Haugset, Tor; Sagen, Jan; Claudel, Magali

doi:10.2118/110461-ms

Cited by 32 publications

(21 citation statements)

References 3 publications

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“…It is suggested in some studies that only the water property should be used in the Turner et al (1969) equation (Coleman et al 1991a). Both results are reported in Table 1 from using only the water property or either water or condensate as appropriate.…”

Section: Equation Underestimates the Critical Gas Velocitymentioning

confidence: 99%

“…Field Data of Coleman et al (1991a). Coleman et al (1991a) focused on wells experiencing liquid loading with lower reservoir pressure, which normally are more likely to have a liquid-loading problem.…”

Section: Equation In Terms Of Conservatismmentioning

confidence: 99%

“…Later, Coleman et al (1991aColeman et al ( , 1991b) examined the Turner et al (1969) method with low wellhead pressure data. They concluded that the original Turner et al derivation (without the 20% upward adjustment) matches better with their own data.…”

Section: Introductionmentioning

confidence: 99%

“…They also reported that only 0.4% of the droplets have an axial velocity close to zero when transition of churn-annular flow occurs, which suggests that the droplet reversal is not responsible for liquid loading (van't Westende 2008). In addition, the droplet model is not a function of inclination angle or the pipe diameter, which is known to influence the onset of liquid loading (Coleman et al 1991a). …”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A New Comprehensive Model for Predicting Liquid Loading in Gas Wells

Luo

Kelkar

Pereyra

et al. 2014

SPE Production &Amp; Operations

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Liquid loading, which can lead to rapid gas-rate decline and can even cease gas production, is a common phenomenon found in most mature gas wells. An accurate prediction of the inception of liquid loading is of great interest to operators, for the reason that remedial measures can be applied in a timely manner to prevent such conditions from being realized, thereby extending the production life of the gas well. However, the mechanism that is responsible for liquid loading still remains controversial. In the literature, at least three different definitions of liquid loading exist. The first definition is based on the intersection of inflow and outflow curves, the second definition is based on the reversal of entrained liquid droplets, and the third definition is based on the reversal of liquid film. These definitions yield different results when predicting the inception of liquid loading. In this paper, a new definition of liquid loading is introduced. This new definition is based on the relative contributions of gravity and residual pressure drop, and it is validated by its agreement with air/water experimental data.A new comprehensive model is developed that is based on the Barnea (1986Barnea ( , 1987 model. For vertical wells, the new model can better predict the inception of liquid loading than the widely used Turner et al. (1969) equation. For deviated wells, it is observed in the field and in laboratories that liquid loading starts much earlier than in vertical wells, and most liquid-loading equations are not appropriate for deviated wells. The new model takes into account the nonuniform film thickness around the circumferential position of the pipe, and, thus, it improves the prediction of liquid loading in deviated wells. The new model is validated through the use of field data in the literature and experimental data obtained at the University of Tulsa. In addition to the literature data, a new set of field data is reported and used to validate the new model, which shows a significant improvement over the droplet model as well as other film models.

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Section: Equation Underestimates the Critical Gas Velocitymentioning

confidence: 99%

Section: Equation In Terms Of Conservatismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A New Comprehensive Model for Predicting Liquid Loading in Gas Wells

Luo

Kelkar

Pereyra

et al. 2014

SPE Production &Amp; Operations

View full text Add to dashboard Cite

show abstract

“…Among their case studies, they included a sinusoidal ICV setting variation and obtained an ellipsis on a bottomhole pressure vs. mass rate plot. Chupin et al (2007) investigated liquid loading in gas wells by implicit coupling of a commercial transient wellbore simulator and a near-wellbore model based on the mass conservation equations and Darcy's law written for the liquid and gas phases. However, they did not provide details of the model and solution procedure.…”

Section: Introductionmentioning

confidence: 99%