A Modified Model for Predicting Permeability Damage due to Oilfield Scale Deposition

Fadairo, Adesina; Omole, O.; Falode, Olugbenga

doi:10.1080/10916460802637635

Cited by 11 publications

(10 citation statements)

References 3 publications

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“…Assuming an idealized flow equation, Fadairo and Omole (2007) expressed the effect of scale build up on permeability variation, skin factor and additional pressure drop across the skin based on exponential shape for both porosity and permeability damage function as follows { (Oddo et al 1991 andAtkinson et al 1991):…”

Section: The Modelmentioning

confidence: 99%

“…The detail is expressed by Fadairo & Omole (2007). Considering the relationship between the initial permeability and instantaneous permeability as a function of altered porosity and initial porosity defined by (Civian et al 1989(Civian et al , 1991(Civian et al , 1996 …”

Section: Nomenclaturementioning

confidence: 99%

“…The process pronouncedly occurs around the well bore resulting in permeability damage after water breakthrough at reduced reservoir pressure (Fadairo & Omole 2007). The phenomenon may provoke loss in productivity, injectivity and efficiency of water flooding scheme that is generally dependent on mobility ratio.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Oilfield Scale Deposition on Mobility Ratio

2008

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Scaling phenomenon is a major problem that occurs when water is injected for oil displacement and pressure maintenance in oilfields. This phenomenon of precipitation and accumulation of oilfield scale due to incompatibility between formation and injected water is induced around the well bore after water breakthrough at reduced reservoir pressure. The effect results in formation damage which may negatively impact on reservoir performance well bore performance and the success of water flooding project that depends on mobility ratio. This paper presents an analytical model based on existing thermodynamic models for predicting brine mobility, hydrocarbon mobility and mobility ratio of water flooded reservoir with possible incidence of scale precipitation and accumulation. The key operational and reservoir/brine parameters which influence the mobility ratio such as salt concentration in the brine, produced water rate, pressure drawdown, reservoir temperature were identified using this model. Results of the study shows that the mobility ratio of a water flooded reservoir remains constant until water breakthrough and achieves an increasing local maximum at 10% pore volume injected water as the flow rate of produced water increases with a significant jump beyond the critical flow rate observed at mobility ratio of 1. Similar results corroborating above were obtained with variation in skin factor. This model therefore can be used to diagnose, evaluate and simulate mobility ratio and skin factor in a water flood scheme enabling production engineers plan an economically efficient water flood scheme.

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Section: The Modelmentioning

confidence: 99%

Section: Nomenclaturementioning

confidence: 99%

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Effect of Oilfield Scale Deposition on Mobility Ratio

2008

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“…The prediction and prevention requires description and classification of mixing, precipitation 1 , buildup, and formation damage scenarios [2][3][4][5][6][7] . The prediction and prevention requires description and classification of mixing, precipitation 1 , buildup, and formation damage scenarios [2][3][4][5][6][7] .…”

Section: Introductionmentioning

confidence: 99%

“…The prediction and prevention requires description and classification of mixing, precipitation 1 , buildup, and formation damage scenarios [2][3][4][5][6][7] . The accumulation of precipitates does not occur as a result of mixing zone movement and the precipitate deposited at a point in the reservoir during mixing zone movement does not cause significant permeability reduction [2][3][4][5][6] . The accumulation of precipitates does not occur as a result of mixing zone movement and the precipitate deposited at a point in the reservoir during mixing zone movement does not cause significant permeability reduction [2][3][4][5][6] .…”

Section: Introductionmentioning

confidence: 99%

Oilfield Scale-Induced Permeability Damage Management During Waterflooding

Fadairo

Falode

Aderemi³

2010

All Days

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The precipitation, accumulation and disposition process of oilfield sulphate scales is a major ongoing flow assurance problem in hydrocarbon production. This pose serious injectivity and productivity problems in a water flooded reservoirs. Several works and software packages such as multi-scale 6.0 and scalechem have been developed for predicting scaling tendency and average scales precipitation inside the reservoir but neglecting the fact that not all the occurring scale precipitation would cause formation damage near the well bore region. Some of the precipitated scales escape through the pore spaces to render havoc to flow in the production string since it is not all the scale precipitation inside the reservoir would plug the formation. For an adequate planning and monitoring of water injection, scale treatment schedule and disposition programme, there is the need to estimate the fraction of sulphate scales precipitation that occupies pore spaces and the corresponding degree of permeability damage at well bore vicinity. It is also imperative to evaluate the effects of oilfield scale induced permeability damage on the success of water flooding project. In this paper, an interactive software package has been developed for predicting the fraction of oilfield scales that occupies pore space and the corresponding permeability damage at different location away from the well bore. The software complement the existing oilfield scaling prediction software such as multi-scale 6.0, scalechem and scalbute recently reported by Fadairo et al. This is useful for adequate planning and controlling of water injection project, oilfield scale treatment schedule and disposition programme.

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Oilfield scale inhibitors: Synthetic and performance aspects

Mady

2022

Water-Formed Deposits

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A Modified Model for Predicting Permeability Damage due to Oilfield Scale Deposition

Cited by 11 publications

References 3 publications

Effect of Oilfield Scale Deposition on Mobility Ratio

Effect of Oilfield Scale Deposition on Mobility Ratio

Oilfield Scale-Induced Permeability Damage Management During Waterflooding

Oilfield scale inhibitors: Synthetic and performance aspects

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