Study of the dynamics, optimization and selection of intermittent gas-lift methods—a comprehensive model

Santos, Odair G; Bordalo, Sergio N.; Alhanati, Francisco J.S.

doi:10.1016/s0920-4105(01)00164-4

Cited by 28 publications

(15 citation statements)

References 4 publications

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“…Liao [11], Santos [9], and Filho [4] were developed mathematical model of intermittent gas lift. Tasmi, et.…”

Section: Mathematical Modelmentioning

confidence: 99%

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Mathematical analysis of intermittent gas injection model in oil production

Tasmi¹,

Silvya²,

Pudjo³

et al. 2016

AIP Conference Proceedings

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Abstract. Intermittent gas injection is a method to help oil production process. Gas is injected through choke in surface and then gas into tubing. Gas forms three areas in tubing: gas column area, film area and slug area. Gas column is used to propel slug area until surface. A mathematical model of intermittent gas injection is developed in gas column area, film area and slug area. Model is expanding based on mass and momentum conservation. Using assume film thickness constant in tubing, model has been developed by Tasmi et. al. [14]. Model consists of 10 ordinary differential equations. In this paper, assumption of pressure in gas column is uniform. Model consist of 9 ordinary differential equations. Connection of several variables can be obtained from this model. Therefore, dynamics of all variables that affect to intermittent gas lift process can be seen from four equations. To study the behavior of variables can be analyzed numerically and mathematically. In this paper, simple mathematically analysis approach is used to study behavior of the variables. Variables that affect to intermittent gas injection are pressure in upstream valve and in gas column. Pressure in upstream valve will decrease when gas mass in valve greater than gas mass in choke. Dynamic of the pressure in the gas column will decrease and increase depending on pressure in upstream valve.

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“…Liao [11], Santos [9], and Filho [4] were developed mathematical model of intermittent gas lift. Tasmi, et.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…[2] in the intermittent gas lift with plunger. Liao model has been expanded to other variants of intermittent gas lift by Santos et al [9]. Filho and Bordalo [4] developed the new intermittent gas lift model and simulating with coupled [10].…”

Section: Introductionmentioning

confidence: 99%

Mathematical analysis of intermittent gas injection model in oil production

Tasmi¹,

Silvya²,

Pudjo³

et al. 2016

AIP Conference Proceedings

View full text Add to dashboard Cite

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“…2 and 3). These domains represent practical applications of the gas-lift oil production method [1,16,27,28].…”

Section: Mechanical Model Of Moving Gas and Gas-liquid Mixture (Glm)mentioning

confidence: 99%

Problems of modeling and optimal stabilization of the gas-lift process

2010

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The problems of motion of fluids, gases and gas-liquid mixtures in pipes related to gas-lift oil recovery are mathematically formulated as systems of nonlinear hyperbolic partial differential equations. Optimal-control problems are posed based on the proposed models and some real assumptions. These problems can be used to design programmed paths and controls, which underlie the controllers that stabilize the pressure or volume of injected gas. That the mathematical models agree with available field and laboratory data is demonstrated by examples

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“…Santos et al 7 improved Liao's modeling approach, and extended it to other variants of the IGL: the IGL with chamber, the IGL with plunger (ideal case) and the IGL with pig (pig-lift); including the gas injection stage on the simulation.…”

Section: Literature Reviewmentioning

confidence: 99%

Assessment of Intermittent Gas Lift Performance Through Simultaneous and Coupled Dynamic Simulation

Filho

Bordalo

2005

All Days

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractThe assessment of Intermittent Gas Lift (IGL) by computer calculations using the mechanistic models found in the literature usually approaches the IGL's operating cycle as a sequence of independent non-interacting stages, occurring back-to-back, without overlapping in time; that approach restricts the system analysis to the limited range of operational conditions when such particular behavior indeed exists. In fact, out of such range, some stages of the IGL cycle may be rather simultaneous than sequential, as previously assumed. This paper presents a new IGL mechanistic model and simulation scheme to consider the possible occurrence of both sequential and simultaneous stages throughout the IGL cycles. The dynamics of the IGL cycles is assessed through a simultaneous and coupled variable set of non-linear algebraic and time-differential equations, interactively defined on the run and solved according to the ongoing stages of the IGL cycle. A case study for a typical IGL well, producing from a low productivity reservoir partially depleted, at different operational conditions, shows how the IGL computer simulator can help the operator to set up the IGL parameters to maximize the well production or its economic gain.

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Study of the dynamics, optimization and selection of intermittent gas-lift methods—a comprehensive model

Cited by 28 publications

References 4 publications

Mathematical analysis of intermittent gas injection model in oil production

Mathematical analysis of intermittent gas injection model in oil production

Problems of modeling and optimal stabilization of the gas-lift process

Assessment of Intermittent Gas Lift Performance Through Simultaneous and Coupled Dynamic Simulation

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