Effect of stress build-up around standalone screens on the screen performance in SAGD wells

Guo, Yujia; Roostaei, Morteza; Nouri, Alireza; Fattahpour, Vahidoddin; Mahmoudi, Mahdi; Jung, Heeseok

doi:10.1016/j.petrol.2018.07.040

Cited by 21 publications

(14 citation statements)

References 7 publications

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“…It took shorter for the multi-particle arch to reform after breakage for the cases with increasing stress load. The numerical results were in agreement with the experimental results presented in [23] and [24].…”

Section: Spherical Particle (Ar = 1) Uniformsupporting

confidence: 89%

“…In this section, the stress of the reservoir was added to the packed-bed in different ways to investigate its effect on the region close to the slot and on the multi-particle arch behavior. Guo et al [23] studied the effect of the stress in a large-scale unconsolidated sand pack over a multi-slot coupon of the slotted liner. The experimental results showed that the TABLE II: Monitored times (in seconds) for when multi-particle arching happened, broke and reformed at a WWS opening comparing uniform and PSD cases.…”

Section: Packed-bed Cases With Added Reservoir Loadmentioning

confidence: 99%

“…Plugging is an issue because it decreases the efficiency of filter. Particle buildup [12], another undesirable phenomenon, also happens due to the transport of very small particles in the system.…”

Section: Introductionmentioning

confidence: 99%

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CFD-DEM Simulation Of Multi-Particle Arching At Sand Filter Opening

Razavi¹,

Komrakova²,

Lange³

2021

Progress in Canadian Mechanical Engineering. Volume 4

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The primary motivation of this research is to offer an insight into the conditions and parameters that influence on the formation, stabilization, destruction and reformation of the multi-particle sand arching (bridging) as an efficient particle retention mechanism occurred at filter opening. The arching phenomenon is numerically explored by coupling two tools: CFD to model the fluid flow, and DEM to model the particle flow. The coupling is done in STAR-CCM+ (SIEMENS PLM). In this research, the arching at the filter opening at the micro-scale with heavy oil as the carrier phase of particles (in oil sand reservoirs) is investigated. The research outcome of this study is a computational fluid dynamic (CFD) -discrete element method (DEM) model cable of predicting multi-particle arch formation, stabilization, breakage and reformation. In particular, some of the parameters and conditions that could affect multi-particle arch performance are also studied such as size and shape of the particles and particle size distribution. Applying and advancing the knowledge gained in this research will help the research industry partner make better decisions about filter selection and filter opening design.

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Section: Spherical Particle (Ar = 1) Uniformsupporting

confidence: 89%

Section: Packed-bed Cases With Added Reservoir Loadmentioning

confidence: 99%

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CFD-DEM Simulation Of Multi-Particle Arching At Sand Filter Opening

Razavi¹,

Komrakova²,

Lange³

2021

Progress in Canadian Mechanical Engineering. Volume 4

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“…In this study, the effect of stress on sand production has been investigated together with slot width and density, and is incorporated in the design criteria for slotted liners in SAGD operations. In order to do so, a novel sand control testing facility (scaled completion test, SCT) is utilized to study the performance of sand control tools for different stress regimes (triaxial compression/extension) [16,29]. The stress levels correspond to stress 218 variations during the life cycle of a SAGD production well.…”

Section: Existing Criteria For Sand Control Devices In Sagd Wellsmentioning

confidence: 99%

“…The experimental apparatus used in this study (Scaled Completion Test, SCT) [16,29,30], accommodates the sand-pack sample on top of a sand screen coupon. Compared to conventional SRT set-ups, it has the versatility to use multi-slot liner samples which is an improved design to replicate the actual flow regime and streamlines near the sand control device/slotted liner of a production well.…”

Section: Scaled Completion Test (Sct) Set-upmentioning

confidence: 99%

Effect of Slot Width and Density on Slotted Liner Performance in SAGD Operations

2020

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Sand production from a poorly consolidated reservoir could give rise to some severe problems during production. Holding the load bearing solids in place is the main goal of any sand control technique. The only sand control techniques that have found applications in steam assisted gravity drainage (SAGD) are some of the mechanical methods, including wire wrapped screens, slotted liners and more recently, punched screens. Slotted liner is one of the most effective mechanical sand control methods in the unconsolidated reservoir exploitation, which has proven to be the preferred sand control method in the SAGD operations. The main advantage of the slotted liners that makes them suitable for SAGD operations is their superior mechanical integrity for the completion of long horizontal wells. This study is an attempt to increase the existing understanding of the fines migration, sand production, and plugging tendency for slotted liners by using a novel large-scale scaled completion test (SCT) facility. A triaxial cell assembly was used to load sand-packs with specified and controlled grain size distribution, shape and mineralogy, on multi-slot sand control coupons. Different stress levels were applied parallel and perpendicular to different combinations of slot width and density in multi-slot coupons, while brine was injected from the top of the sand-pack towards the coupon. At each stress level, the mass of produced sand was measured, and the pressure drops along the sand-pack and coupon were recorded. Fines migration was also investigated by measuring fines/clay concentration along the sand-pack. The current study employed multi-slot coupons to investigate flow interactions among slots and its effect on the flow performance of liner under typically encountered stresses in SAGD wells. According to the experimental observations, increasing slot width generally reduces the possibility of pore plugging caused by fines migration. However, there is a limit for slot aperture beyond which the plugging is not reduced any further, and only a higher level of sanding occurs. Test measurements also indicated that besides the slot width, the slot density also influences the level of plugging and sand production and must be included in the design criteria.

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