Model-based optimal control of dual completion wells

Conejeros, Raúl; Lenoach, B.

doi:10.1016/j.petrol.2003.07.001

Cited by 5 publications

(4 citation statements)

References 11 publications

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“…Indeed in optimisation applications, the value of S at the production completion often plays the role of an operational constraint (Conejeros and Lenoach, 2004). Fig.…”

Section: Resultsmentioning

confidence: 99%

“…A full solution should describe the variation of pressure and saturation with space and time. Note that in practical problems the relative permeabilities are given in the form of look-up tables, a typical reservoir simulator interpolates from these tables (Conejeros and Lenoach, 2004). For simplicity the following quadratic approximations, known in the literature as Corey-type approximations (Zhang and Tchelepi, 1999), to the relative permeability functions are used…”

Section: The Two-phase Flow Equationsmentioning

confidence: 99%

“…One of the systems that we examined in an earlier paper (Conejeros and Lenoach, 2004), was a completion system with a single horizontal injector and three horizontal producing completions. In that case we studied the two-phase fluid flow control problem under the assumption that the reservoir block was homogeneous.…”

Section: Approximation For the Horizontal Producer Problemmentioning

confidence: 99%

See 2 more Smart Citations

Effect of uncertainty on 2-phase flow into a horizontal completion

Conejeros

Lenoach

2007

Journal of Petroleum Science and Engineering

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“…Indeed in optimisation applications, the value of S at the production completion often plays the role of an operational constraint (Conejeros and Lenoach, 2004). Fig.…”

Section: Resultsmentioning

confidence: 99%

Section: The Two-phase Flow Equationsmentioning

confidence: 99%

Section: Approximation For the Horizontal Producer Problemmentioning

confidence: 99%

See 1 more Smart Citation

Effect of uncertainty on 2-phase flow into a horizontal completion

Conejeros

Lenoach

2007

Journal of Petroleum Science and Engineering

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“…In field operations, the SS gas lift injection valve was always placed shallower than that of the LS. Conejeros [6] proposed to optimize the dual string production by producing water through LS and oil through SS; his work does not consider the gas lift. The design of gas lifting for the dual string completion has proven to be a challenge.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Model for Determining Dual String Gas Lift Split Factor in Oil Producers

et al. 2019

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Upstream oil production using dual string completion, i.e., two tubing inside a well casing, is common due to its cost advantage. High pressure gas is employed to lift the oil to the surface when there is insufficient reservoir energy to overcome the liquids static head in the tubing. However, gas lifting for this type of completion can be complicated. This is due to the operating condition where total gas is injected into the common annulus and then allowed to be distributed among the two strings without any surface control. High uncertainties often result from the methods used to determine the split factor—the ratio between the gas lift rate to one string over the total gas injected. A hybrid model which combined three platforms: the Visual Basics for Application programme, PROSPER (a nodal analysis tool) and Excel spreadsheet, is proposed for the estimation of the split factor. The model takes into consideration two important parameters, i.e., the lift gas pressure gradient along the annulus and the multiphase pressure drop inside the tubing to estimate the gas lift rate to the individual string and subsequently the split factor. The proposed model is able to predict the split factor to within 2% to 7% accuracy from the field measured data. Accurate knowledge of the amount of gas injected into each string leads to a more efficient use of lift gas, improving the energy efficiency of the oil productions facilities and contributing toward the sustainability of fossil fuel.

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