Simple Approach to the Cleanup of Horizontal Wells With Prepacked Screen Completions

Browne, Sid; Ryan, D.F.; Chambers, B.D.; Bamforth, Steve

doi:10.2118/30116-pa

Cited by 34 publications

(19 citation statements)

References 3 publications

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“…In the modelling, the numerical WI is calculated by Eq. (9) in the presence of the external cake, and it is recalculated by Eq. (6) when the cake is broken down.…”

Section: Modelling Of Natural Cleanup During Back Flowmentioning

confidence: 99%

“…This induces an additional damaging effect (water blocking) due to drastic reduction of oil relative permeability 8 . Generally, for rating the performance of various drill-in fluid formulations, the permeability damage is quantified through oil return permeability measurements and flow-initiation pressures (FIP), performed at relevant flow rates on core samples damaged during dynamic mud filtrations tests [9][10][11][12][13][14] . But only few attempts were made to transfer these laboratory data into a near-wellbore model to evaluate the impact of the permeability damage on the well performance.…”

Section: Introductionmentioning

confidence: 99%

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Modelling of Both Near-Wellbore Damage and Natural Cleanup of Horizontal Wells Drilled With a Water-Based Mud

Ding

Longeron

Renard

et al. 2002

International Symposium and Exhibition on Formation Damage Control

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractPrediction of formation damage that occurs in horizontal wells, often open hole completed, is a critical point for optimising an oil field development. The economic impact of near wellbore induced drilling-damage and cleanup efficiency has led to make significant progress in both experimental and numerical studies in order to assess the wellbore flow properties during oil production.There is a fundamental difference between water-based and oil-based mud invasions. In an oil-bearing formation, the displacement of the oil in place with an oil-based mud (OBM) filtrate is a miscible displacement process, while the displacement with a water-based mud (WBM) filtrate is a twophase flow process (imbibition), generating high wetting phase saturations in the invaded zone. Then, during oil back flow, a portion of the wetting phase is trapped, leading to residual wetting phase saturations greater than the initial ones. Even in the absence of chemical interactions between filtrate and fluids in place, this induces an adverse water/oil relative permeability effect, which is an additional permeability impairment. In a previous paper, a methodology combining both experimental and numerical approach was presented to evaluate the natural cleanup of horizontal wells drilled with an oil-based mud (OBM). This paper presents an extension of the methodology for simulating both i) near wellbore invasion and permeability damage generated with a water-based mud (WBM), and ii) natural cleanup during oil back flow when the well is put under production. This paper describes a numerical approach to model the formation damage with WBM and predict well performance for natural clean up when the well is subject to a pressure drawdown. The kinetics of mud filtrate invasion, the filter cake properties and the filtrate/oil relative permeability curves in imbibition and drainage, together with damaged and return permeabilities are obtained from specific mud damage laboratory tests. Using these data, the mud filtrate invasion during the drilling phase is simulated, leading to a cone-type invasion depth along the horizontal well. This approach has allowed us to study the impact of various parameters related to fluids or cake properties, drilling conditions and natural cleanup process on the well performance.

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“…In the modelling, the numerical WI is calculated by Eq. (9) in the presence of the external cake, and it is recalculated by Eq. (6) when the cake is broken down.…”

Section: Modelling Of Natural Cleanup During Back Flowmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modelling of Both Near-Wellbore Damage and Natural Cleanup of Horizontal Wells Drilled With a Water-Based Mud

Ding

Longeron

Renard

et al. 2002

International Symposium and Exhibition on Formation Damage Control

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show abstract

“…In the past a great number of experimental studies have been conducted to assess mud filtration properties, drilling-induced damage and to evaluate cake lift off pressures and cleanup techniques [2][3][4][5][6][7] . But generally these studies were conducted on small pieces of core samples (2 to 5 cm), on metallic porous disks or sometimes on filter papers initially saturated with brine only and under operating conditions quite far from those prevailing in wells (pressure, temperature, shear rate, etc.).…”

Section: Development Of Enhanced Laboratory Testing Proceduresmentioning

confidence: 99%

Experimental and Numerical Approach for the Productivity Study of Open Hole Completed Horizontal Wells

Ding

Longeron

Renard

et al. 2001

Canadian International Petroleum Conference

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Formation damage in horizontal wells, often open hole completed, is a critical point for oil fields developed in deep offshore where acceptable development costs are based upon a limited number of highly productive wells. This paper describes a simplified numerical approach to model filter cakes removal by natural cleanup when the well is put under a drawdown pressure difference. A flow simulator taking into account the near well permeability variation has been developed using cylindrical grid with very small gridblocks around the well. Laboratory data obtained on sandstones damaged with an oil-based mud have been used as input data to model filter cakes removal by natural cleanup. The purpose of this modelling is to optimize the applied drawdown pressure to study the variation of well productivities as a function of the pressure drawdown to get the best possible well performance preventing sand production problems in poorly consolidated formations.

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“…The generally poor level of clean-up led to serious plugging problems in many wells. [11][12][13][14] Although there were variations between operators, failure rates of 50% and higher occurred in a number of early projects using standalone screens for sand control in horizontal wells. 1 As better drill-in fluids were developed and better clean-up techniques implemented, horizontal well failure rates declined to an industry average of around 15 to 20%.…”

Section: Standalone Screens or Open Hole Gravel Packing?mentioning

confidence: 99%

Design Methodology for Selection of Horizontal Open-Hole Sand Control Completions Supported by Field Case Histories

Bennett¹,

Gilchrist²,

Pitoni³

et al. 2000

Proceedings of SPE European Petroleum Conference

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractReservoirs requiring sand control pose a major challenge for selection of a suitable completion method. Horizontal openhole completions have been successfully utilised in such reservoirs to eliminate sand production, while maximising productivity/injectivity and well deliverability throughout the expected life of the completion and minimising risk and complexity.

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Simple Approach to the Cleanup of Horizontal Wells With Prepacked Screen Completions

Cited by 34 publications

References 3 publications

Modelling of Both Near-Wellbore Damage and Natural Cleanup of Horizontal Wells Drilled With a Water-Based Mud

Modelling of Both Near-Wellbore Damage and Natural Cleanup of Horizontal Wells Drilled With a Water-Based Mud

Experimental and Numerical Approach for the Productivity Study of Open Hole Completed Horizontal Wells

Design Methodology for Selection of Horizontal Open-Hole Sand Control Completions Supported by Field Case Histories

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