An Integrated Approach to Field Surveillance Improves Efficiency in Gas Lift Optimization in Bokor Field, East Malaysia

Kartoatmodjo, Gayatri; Strasser, Ralf; Jadid, Maharon Bin; Caretta, Fausto; Bakar, Ghazaly; Liew, Joseph

doi:10.2523/12225-ms

Cited by 2 publications

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“…Some references in the literature (Tokar et al 1996;Faustinelli et al 1999;Lyngholm et al 2007;Kartoatmodjo et al 2008) describe field applications and the resulting benefits. In Brazil, approximately 200 wells, most offshore, are now equipped with these valves.…”

Section: Introductionmentioning

confidence: 99%

A Model To Calculate the Theoretical Critical Flow Rate Through Venturi Gas Lift Valves

Almeida

2010

SPE Journal

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A model to calculate the theoretical critical flow rate of nitrogen (N 2 ) or natural gas through a Venturi gas lift valve is described herein. This new model considers real-gas effects not only in density calculations but also in other thermodynamic properties that are relevant during gas isentropic evolution.For the properties of N 2 , the Bennedict, Webb, and Rubin (BWR) equation of state and an accurate correlation for the idealgas isobaric heat capacity were used. For natural gas, the Dranchuk and Abou-Kassem equation, which reproduces the well-known Standing and Katz chart, was used, and, for the ideal-gas isobaric heat capacity, it was assumed that the natural gas was a mixture of methane and ethane only, their individual ideal-gas heat capacity being calculated by updated correlations.To validate the use of the proposed equations of state, a comparison of calculated with experimental or reference data on properties of N 2 and natural gas (including pure methane and some relevant mixtures) was performed with very good results for N 2 and for natural-gas compositions usual in gas lift operations (dry gas with very small amounts of contaminants). For natural gas with moderate amounts of N 2 and carbon dioxide (CO 2 ), accurate results were obtained after correction of critical conditions and of ideal heat capacity. The model was also compared with other theoretical models found in the literature, which use compositional approaches for natural gas, with excellent results. Some experimental results obtained with commercial Venturi valves manufactured in Brazil are also presented.

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Section: Introductionmentioning

confidence: 99%

A Model To Calculate the Theoretical Critical Flow Rate Through Venturi Gas Lift Valves

Almeida

2010

SPE Journal

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Some Design Aspects for Venturi Gas Lift Valves

Almeida

2015

SPE Production &Amp; Operations

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Summary The Venturi valve represents a significant advancement in the technology of gas lift in petroleum wells. Its use is expanding, and an understanding of the theoretical and practical aspects is fundamental to maximize the benefits of its application. The application-related aspects are reasonably well-covered in the literature; however, to achieve good performance and promote the expected benefits, some valve-design aspects have to be taken into account. This paper describes key points, including a recommended Venturi geometry, the influence of several Venturi design parameters on performance, and an analysis of the role of the check valve. The design guidelines provided in this work are supported by experimental tests performed at Petrobras’ Gas Lift Valves Test Unit and by sizable experience with Venturi valves after more than 600 valves run in wells or tested.

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An Integrated Approach to Field Surveillance Improves Efficiency in Gas Lift Optimization in Bokor Field, East Malaysia

Cited by 2 publications

References 0 publications

A Model To Calculate the Theoretical Critical Flow Rate Through Venturi Gas Lift Valves

A Model To Calculate the Theoretical Critical Flow Rate Through Venturi Gas Lift Valves

Some Design Aspects for Venturi Gas Lift Valves

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