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Effect of Flow Rate on Disproportionate Permeability Reduction
International Symposium on Oilfield Chemistry, 2003Abstract Disproportionate permeability reduction (DPR), in which water permeability is reduced to a much greater extent than oil permeability, has been observed in a number of polymer gel systems. Although several different mechanisms have been proposed, no one mechanism has been generally accepted.
S. Ganguly +3 more
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Stress-Induced Permeability Reduction in Fissured Reservoirs
SPE Annual Technical Conference and Exhibition, 1993Abstract Stresses near any wellbore are different and likely to be higher than the far-field stresses. In addition, fluid production and the corresponding pressure drawdown lead to an increase of the effective stress. This increase results in a substantial reduction in the corresponding permeability, especially if the latter is primarily
Hubert Buchsteiner +2 more
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Disproportionate Permeability Reduction by Soft Preformed Microgels
SPE/DOE Symposium on Improved Oil Recovery, 2004AbstractInjecting soft, stable and size-controlled microgels to reduce water production is a new concept, introduced some years ago, we refer to as STARPOL process. Microgels specifically designed for water shutoff (WSO) treatments do not contain toxic products and can be produced to be fully self-repulsive.
Guy Chauveteau +5 more
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Experimental Investigation of Asphaltene Induced Permeability Reduction
SPE EOR Conference at Oil & Gas West Asia, 2010Abstract CO2 injection is one of efficient enhanced oil recovery (EOR) methods among gas flooding, however, asphaltene precipitation during CO2 injection might lead to production loss and reduced efficiency. To understand the mechanism of asphaltene deposition is necessary to develop effective engineering practice for minimizing the ...
Yoshihisa Hayashi, Hiroshi Okabe
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Diagenetic Mechanisms of Porosity and Permeability Reduction and Enhancement
1994Abstract This segment of the notes presents an overview of diagenetic processes of porosity and permeability destruction and enhancement. In the limited space available here, it is impossible to cover in any detail the vast literature on this subject. Thus, only the volumetrically important mechanisms of reservoir quality modification
Michael D. Wilson, Peter T. Stanton
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Influence of Syneresis on Permeability Reduction by Polymer Gels
SPE Production & Facilities, 1996Summary Syneresis is commonly believed to be incompatible with the application of polymer gels to reduce the permeability of porous media. In this paper, it is shown that, although the permeability of a geltreated porous medium does increase as syneresis proceeds, the degree of permeability reduction in cores remains technologically ...
S. L. Bryant +2 more
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Reduction of Oil and Water Permeabilities Using Gels
SPE/DOE Enhanced Oil Recovery Symposium, 1992Abstract Several previous researchers reported that polymers- or gels can reduce permeability to water more than to oil. However, a plausible explanation for the phenomenon is not yet available. This property is critical to the success of gel treatments in production wells if zones cannot be isolated during gel placement. We examined how
J. Liang, H. Sun, R.S. Seright
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The Effect Of Maximum Suspension Size On Permeability Reduction
Annual Technical Meeting, 1988Abstract The productivity of many hydrocarbon-bearing formations appears to be reduced during water flooding operations. The reason for this reduction is mainly attributed to the permeability damage of the formation surrounding the bore hole. A possible cause of this damage is the precipitation of suspensions on the
Zaiad Aswad, N. Rahim, A. Taha
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Modeling Permeability Reduction Caused by Asphaltene Deposition
SPE Annual Technical Conference and Exhibition, 2005Abstract This study formulates a model for estimating permeability impairment caused by asphaltene deposition. The model is based on a mass balance and is capable of predicting permeability reduction in either vertical or horizontal wells. The model accounts for both the effects of position in the reservoir and time.
Ali Garrouch, Feras Al-Ruhaimani
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