Influence of the Multi-Layered Reservoir on the Production Dynamics of the Gas Condensate Well During Multi Rate Testing (Russian)

Shandrygin, Alexander; Rudenko, D.; Kuzmichev, D.

doi:10.2118/138087-ru

Pressure Data Analysis and Multilayer Modeling of a Gas-Condansate Reservoir

Happy¹,

Hossain²,

Rahman³

2014

Asia Pacific Journal of Energy and Environment

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Kailastila gas field located at Golapgonj, Sylhet is one of the largest gas fields in Bangladesh. It produces a high amount of condensate along with natural gas. For the high values of GOR, it may be treated as a wet gas at reservoir condition. Three main sand reservoirs are confirmed in this field (upper, middle & lower).In this study, it has been shown that reservoir parameters of this gas field can be obtained for multilayered rectangular reservoir with formation cross-flow using pressure and their semi log derivative on a set of dimensionless type curve.The effects of the reservoir parameters such as permeability, skin, storage coefficient, and others such as reservoir areal extent and layering on the wellbore response, pressure are investigated.Shut in pressures are used in calculating permeability, skin factor, average reservoir pressure, wellbore storage effect and other reservoir properties. The direction of the formation cross flow is determined, first by the layer permeability and later by the skin factor.Finally, it is recommended to perform diagnostic analysis along with multilayer modeling to extract better results.Reservoir can also be considered as a multilayer cylindrical and can also use these models for other fields.

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Pressure Data Analysis and Multilayer Modeling of a Gas-Condansate Reservoir

Happy¹,

Hossain²,

Rahman³

2015

Asia Pac. j. energy environ.

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Kailastila gas field located at Golapgonj, Sylhet is one of the largest gas fields in Bangladesh. It produces a high amount of condensate along with natural gas. For the high values of GOR, it may be treated as a wet gas at reservoir condition. Three main sand reservoirs are confirmed in this field (upper, middle & lower).In this study, it has been shown that reservoir parameters of this gas field can be obtained for multilayered rectangular reservoir with formation cross-flow using pressure and their semi log derivative on a set of dimensionless type curve.The effects of the reservoir parameters such as permeability, skin, storage coefficient, and others such as reservoir areal extent and layering on the wellbore response, pressure are investigated.Shut in pressures are used in calculating permeability, skin factor, average reservoir pressure, wellbore storage effect and other reservoir properties. The direction of the formation cross flow is determined, first by the layer permeability and later by the skin factor.Finally, it is recommended to perform diagnostic analysis along with multilayer modeling to extract better results.Reservoir can also be considered as a multilayer cylindrical and can also use these models for other fields.

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Experience of Multiphase Flow Measurement Systems Aapplication in Arctic Conditions

Lomukhin¹,

Romashkin²,

Rymarenko

³

et al. 2011

All Days

2

0

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Summary Problems of well production monitoring, flow assurance and control over excavation of resources stand especially serious in harsh Arctic conditions. In case of such difficulties as gas-condensate-oil saturation, high areal and vertical heterogeneity of the reservoir and essential reservoir overpressure strong needs in individual well productivity monitoring appears. This is the only approach to optimize reservoir development properly. Continuous online monitoring of fluid flow from the reservoir to refinery facility allows avoiding hydrate formation and wax-asphalten deposition, so prevent production losses. Now days several gas-condensate fields are under development in Russia. But the only technology recommended by licensing authority for the CGR metering is a large well testing separator. This recommendation has been brought out in 70s years of previous century. Large separators are quite dangerous by nature, cannot be fully automated, and must be equipped with additional heating devices and need expensive maintenance in Arctic conditions. On the license blocks belonging to Rospan International- a TNK-bp company- compact and highly-mobile non-separating multiphase flow metering technologies are being tested and improved. This paper is about more than four years experience of usage of Schlumberger Vx PhaseTester. Also Vx technology enhancements for gas- condensate wells done on Rospan International fields are described. Metrological studies of multiphase flow meters were also done before. Such studies are being carried out by Rospan International in collaboration with service companies- some of the results are published in this paper.

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Influence of the Multi-Layered Reservoir on the Production Dynamics of the Gas Condensate Well During Multi Rate Testing (Russian)

Cited by 3 publications

References 11 publications

Pressure Data Analysis and Multilayer Modeling of a Gas-Condansate Reservoir

Pressure Data Analysis and Multilayer Modeling of a Gas-Condansate Reservoir

Pressure Data Analysis and Multilayer Modeling of a Gas-Condansate Reservoir

Experience of Multiphase Flow Measurement Systems Aapplication in Arctic Conditions

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