Hydrodynamic erosion; A potential mechanism of sand production in weak sandstones

Skj˦rstein, A.; Stavropoulou, Maria; Tronvoll, Johan

doi:10.1016/s1365-1609(97)00190-1

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…Although, for the lowest rate of #ow rate change there is a period with almost no sand production, it appears that the sand production rate, which is the slope of the curves, is rather una!ected by the rate of #uid #ow change. This is in contrast to experiments in loose sand where changes in the #uid #ow rate give rise to a transient behaviour before a new equilibrium stage is reached [5]. …”

Section: Ewect Of Yuid Yow Rate and Rate Of Yow Rate Changecontrasting

confidence: 61%

Volumetric sand production model and experiment

Papamichos¹,

Tronvoll²,

Skjaerstein³

2001

Num Anal Meth Geomechanics

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181

109

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SUMMARYA sand production model was developed for volumetric sand production predictions that take into account the e!ects of the external stresses and #uid #ow rate. The model couples the poro-mechanical behaviour of the solid}#uid system with the erosion behaviour of the solids due to #uid #ow. It predicts reasonably experimental volumetric sand production data from a hollow cylinder test on a weak sandstone. The test results show that in weak and compactive sandstones, sand production is associated with decohesioning and plastici"cation of a zone around the inner hole which can then be mobilized by the hydrodynamic forces of the #uid #ow. The sand production rate increases both with external applied stress and #uid #ow rate but it is constant with time under constant external stress and #uid #ow rate. In both cases a critical lower limit has to be exceeded for sand production initiation.

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Section: Ewect Of Yuid Yow Rate and Rate Of Yow Rate Changecontrasting

confidence: 61%

Volumetric sand production model and experiment

Papamichos¹,

Tronvoll²,

Skjaerstein³

2001

Num Anal Meth Geomechanics

Self Cite

181

109

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“…This can also aid in validating analytical models for predicting the volume and behavior of sand production. К тому же, в предыдущих исследованиях, действие гравитации на вертикальную транспортировку песка в добыче не учитывается, так как используется экспериментальная установка с донной песколовкой для улавливания полученного песок из образца [3][4][5][6]. Поэтому в нашем исследовании рассматривается вертикальное направление потока.…”

Section: Study Of Sand Production Stages In Shallow Oil Fieldsunclassified

Study of Sand Production Stages in Shallow Oil Fields

KOZHAGULOVA,

SHABDIROVА,

SAMENOV

2023

NiG

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This article presents the High Pressure Consolidation System (HPСS) and a new experimental method for studying sand behavior in weak sandstone reservoirs. Under laboratory conditions, geostress conditions during the process of rock sedimentation, perforation, and sand production were replicated using a large artificial sample. A comprehensive investigation of sand production phenomena was conducted, where rock and pore pressures were fully controlled throughout the experiment using a computer. The HPCS also allows the study of single-phase and multiphase flow behavior in porous media at realistic reservoir pressures to model various well exploitation scenarios, such as implementing different depletion factors and water-oil ratios.

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“…In fluidized sand-column experiments performed recently at the IKU on uniform sands, fluid flow and density-wave propagation were monitored by using X-ray computer tomography (CT). In another paper by the authors (Skjaerstein et al . 1997) a three-phase-mixture model was proposed, which mainly addressed the issue of grain mobility.…”

Section: Introductionmentioning

confidence: 97%

Porosity waves in a fluidized sand–column test

Stavropoulou

Skjaerstein

1998

Philosophical Transactions of the Royal Society of London. Seri

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Fluidized sand-column experiments performed at the IKU provided insight into the mechanism of density adjustment to the conditions of flow against the direction of gravity, and for hydraulic gradients around and past the critical value corresponding to the 'quick' condition. X-ray computer-tomography scan images obtained during these tests show a process which could be described as a kinematic density or porosity-wave motion. Forchheimer's flow law, holding in the post-critical regime, is calibrated by using the storage equation and the data concerning the propagation velocity of the observed porosity waves. Finally, the observed rarefaction waves are simulated mathematically and experimental results are back-analysed.

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Hydrodynamic erosion; A potential mechanism of sand production in weak sandstones

Cited by 7 publications

References 2 publications

Volumetric sand production model and experiment

Volumetric sand production model and experiment

Study of Sand Production Stages in Shallow Oil Fields

Porosity waves in a fluidized sand–column test

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