Reservoir Management &amp; Simulation of Al Rayyan-An Offshore Carbonate Oil Field Under Strong Aquifer Drive

Nutakki, R.; Heaviside, J.; Noman, Rashed; Al-Othman, Ibrahim

doi:10.2118/78574-ms

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…In order to develop such reservoirs efficiently and economically, the issue around how to control water coning should be addressed. In recent years, the wide use of horizontal well technology has led to better water coning management and enhanced oil production [1][2][3][4], Contributed by the Petroleum Division of ASME for publication in the Journal of Energy R esources T echnology. Manuscript In comparison to vertical wells, horizontal wells have many advantages, such as possess a larger oil producing capacity, enlarge oil-well contact area, change water coning model by turn ing coning into cresting, decrease water cresting velocity, and enhance oil production in high water-cut stage [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Reasonable Drawdown Pressure of Horizontal Wells in Oil Reservoir With Bottom Water

Liu

Zheng

et al. 2014

Journal of Energy Resources Technology

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For the development o f oil reservoir with bottom water, it is sig nificant to analyze the impact o f drawdown pressures on post water breakthrough performance of horizontal wells. Based on a small-scale and discretized physical simulation system, the impact of different drawdown pressures and the influence o f changing drawdown pressures in different water cut stage have been dis cussed. The results show that for thin oil with relatively high vis cosity (87.8 mPa.s), keeping a relatively large drawdown pressure in medium and low water cut stage is reasonable. But enlarging drawdown pressure in high water cut stage is harmful to increase ultimate oil recovery. For oil with further lower viscosity (21.4 mPa.s), adopting a small drawdown pressure and increasing it in medium and high water cut stage is reasonable. For the heavy oil (124.1 mPa.s), it is acceptable to enlarge drawdown pressure under the condition o f low water cut period.

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Section: Introductionmentioning

confidence: 99%

Experimental Study of Reasonable Drawdown Pressure of Horizontal Wells in Oil Reservoir With Bottom Water

Liu

Zheng

et al. 2014

Journal of Energy Resources Technology

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Field Applications of a Semianalytical Model of Multilateral Wells in Multilayer Reservoirs

Pan

Kamal

Kikani

2009

SPE Western Regional Meeting

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Advanced drilling technology has been widely and successfully applied to construct multilateral wells in reservoirs. This paper presents several field applications of the modeling of complex well architectures. A generalized semi-analytical segmented model, accounting for multilateral well systems in commingled layered reservoirs was used in several field applications. Cases include evaluating the flow efficiency of different configurations of wells with multiple laterals, analyzing an interference test between three horizontal wells in Al Rayyan oil field offshore Qatar, and analyzing a well test in a commingled multilateral well in a multilayer reservoir in the Dos Cuadras field offshore California. The model can predict the production performance under either constant-rate or constant-pressure conditions of a well system with any number of arbitrarily oriented laterals of any length and nonuniform formation damage. The reservoir layers, with different porosities, anisotropic permeabilities and drainage areas, are non-communicating except through the wellbore. The solution is valid for large reservoirs and when no-flow or constant-pressure boundaries affect the pressure behavior. Results of applying this method in the field cases showed that the model enabled us to predict multilateral well performance, to obtain information about reservoir connectivity, and to estimate well and reservoir properties in a multilayer system. Uncertainty, due to the large number of unknown parameters in such a complex system, represents the main challenge in using this method. It is recommended to use other means (e.g. production logging and PNC log) together with pressure transient data to reduce the uncertainty. Whenever possible, each lateral should be tested individually to provide more reliable estimates of reservoir and well properties. The presented model and the lessons learned from the field applications provide engineers a tool to use transient data collected from multilateral wells in multilayer systems for reservoir characterization and performance forecast. Background Information Methods are becoming commonplace for drilling horizontal wells, slanted wells and one or more curved wells from a common central hole in producing formations. These wells will have productivities exceeding that of a single vertical well or a single horizontal well. The performance of these wells depends greatly on appropriate reservoir selection, substantial predrilling formation evaluation and optimized completion and stimulation practices. Several studies addressed pressure transient behavior of slanted, horizontal and multilateral wells. Examples include work on spatial transformation for deviated well in anisotropic reservoir (Besson 1990), multiple horizontal wells (Economides et al. 1996, Retnanto and Economides 1996, and Yildiz 2000), and segmentation technique (Gommanard and Horne 1996). There are also studies of transient solution in layered reservoirs (Kuchuk and Wilkinson 1988, Spath, et al. 1990, and Kuchuk 1991, etc.), and field applications of multilateral well in multilayer formation (Vo and Madden 1995 and Youcef, et al. 2008, etc.) A comprehensive single- and multilateral wellbore pressure response prediction model allows arbitrary positioning of the well laterals in layered anisotropic formations. Such a flexible and generalized model can be used to study several plausible scenarios, especially the economic advantages of drilling multiple laterals from the same wellbore in a layered reservoir.

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Field Applications of a Semianalytical Model of Multilateral Wells in Multilayer Reservoirs

Pan

Kamal

Kikani

2010

SPE Reservoir Evaluation &Amp; Engineering

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Advanced drilling technology has been widely and successfully applied to construct multilateral wells in reservoirs. This paper presents several field applications of a generalized semianalytical segmented model accounting for multilateral-well systems in commingled layered reservoirs. Cases include a heavy-oil field, Al Rayyan oil field offshore Qatar, and Dos Cuadras field offshore California.The model can predict the production performance under either constant-rate or constant-pressure conditions of a well system with any number of arbitrarily oriented laterals of any length and nonuniform formation damage. The reservoir layers, with different porosities, anisotropic permeabilities, and drainage areas, are noncommunicating except through the wellbore. The solution is valid for large reservoirs and when no-flow or constant-pressure boundaries affect the pressure behavior.Results of applying this method in the field cases showed that the model enabled us to predict multilateral-well performance, to obtain information about reservoir connectivity, and to estimate well and reservoir properties in a multilayer system. Uncertainty caused by the large number of unknown parameters in such a complex system represents the main challenge in using this method. It is recommended to use other means together with pressure transient data to reduce the uncertainty.The presented model and the lessons learned from the field applications provide engineers with a tool enabling the use of transient data collected from multilateral wells in multilayer systems for reservoir characterization and performance forecast.

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Reservoir Management & Simulation of Al Rayyan-An Offshore Carbonate Oil Field Under Strong Aquifer Drive

Cited by 3 publications

References 3 publications

Experimental Study of Reasonable Drawdown Pressure of Horizontal Wells in Oil Reservoir With Bottom Water

Experimental Study of Reasonable Drawdown Pressure of Horizontal Wells in Oil Reservoir With Bottom Water

Field Applications of a Semianalytical Model of Multilateral Wells in Multilayer Reservoirs

Field Applications of a Semianalytical Model of Multilateral Wells in Multilayer Reservoirs

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