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Disproportionate permeability reduction

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Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 9–11, 2017
Paper Number: SPE-187364-MS
... Abstract Disproportionate permeability reduction (DPR) is a phenomenon whereby many water-soluble polymer solution and polymer gels reduce the permeability to water flow more than to oil or gas flow. DPR is important for some gels that are applied to production wells in water-shutoff treatments...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 3–5, 2017
Paper Number: SPE-184563-MS
... Abstract A new experimental steady-state, two-phase chemical-system placement for Disproportionate Permeability Reduction (DPR) treatment has been recently established using water-soluble sodium silicate gelants. DPR treatment application in oil-wet formations has shown to be effective...
Journal Articles
SPE Prod & Oper 32 (03): 362–373.
Paper Number: SPE-179589-PA
Published: 26 January 2017
...Reza Askarinezhad; Dimitrios G. Hatzignatiou; Arne Stavland Summary Disproportionate permeability reduction (DPR) may provide field solutions to address high volumes of water production and efficiency of oil recovery in noncommunicating layered reservoirs. This work evaluates the laboratory-scale...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 11–13, 2016
Paper Number: SPE-179589-MS
... Abstract Disproportionate permeability reduction (DPR) may provide field solutions to address high volumes of water production and efficiency of oil recovery in non-communicating layered reservoirs. This work evaluates the lab-scale DPR effectiveness at different formation wettability...
Proceedings Papers

Paper presented at the SPE Asia Pacific Oil & Gas Conference and Exhibition, October 14–16, 2014
Paper Number: SPE-171531-MS
.... Experimental models were designed to study the effect of the particle gel size, particle gel strength, fracture width, and oil viscosity on the disproportionate permeability reduction (DPR). Five-foot tubes with two internal diameters were used to represent a fracture with two different widths. PPGs were...
Proceedings Papers

Paper presented at the Latin American and Caribbean Petroleum Engineering Conference, May 31–June 30, 2009
Paper Number: SPE-121499-MS
... in such well completions; instead sidetracks and new wells are drilled. Disproportionate Permeability Reduction The ability that exhibit polymeric systems, such as relative permeability modifiers and gels, to reduce permeability to water in a higher proportion than permeability to oil is known...
Journal Articles
Journal: SPE Journal
SPE J. 14 (01): 5–13.
Paper Number: SPE-99443-PA
Published: 01 March 2009
... many polymers and gels reduce permeability to water more than to oil or gas, several factors currently limit widespread field applications of this disproportionate permeability-reduction property. Chromium (III)-acetate-hydrolyzed polyacrylamide [Cr(III)-acetate-HPAM] pore-filling gels were...
Proceedings Papers

Paper presented at the Canadian International Petroleum Conference, June 12–14, 2007
Paper Number: PETSOC-2007-121
...1 PAPER 2007-121 Performance of Polyacrylamide-Chromium (III) Gel in Carbonate Porous Media: Effect of Source of Crosslinker on Disproportionate Permeability Reduction and Gel Strength L. KUZMICHONOK, K. ASGHARI, P. NAKUTNYY University of Regina This paper is to be presented at the Petroleum...
Journal Articles
Journal: SPE Journal
SPE J. 11 (02): 145–157.
Paper Number: SPE-89404-PA
Published: 19 June 2006
...T. Q. Nguyen; D. W. Green; G. P. Willhite; C. S. McCool Summary For some polymer gels applied in reservoirs to control water flow, a favorable disproportionate permeability reduction (DPR) occurs in which permeability to water is reduced to a much greater extent than it is to oil. Permeability...
Journal Articles
Journal: SPE Journal
SPE J. 11 (02): 159–170.
Paper Number: SPE-89393-PA
Published: 19 June 2006
... this disproportionate permeability reduction, but the property has not been as predictable as we would like. If the mechanism for this property were understood, gel treatments could be applied with greater reliability. To determine this mechanism for a Cr(III)-acetate-HPAM gel, we used XMT. As an important prelude...
Proceedings Papers

Paper presented at the SPE/DOE Symposium on Improved Oil Recovery, April 22–26, 2006
Paper Number: SPE-99443-MS
...Challenges for Applications of Disproportionate Permeability Reduction Variable Performance. Field applications of polymer and gel treatments have shown substantial variations in performance from one application to the next. In part, these variations arise from differences in reservoir...
Proceedings Papers

Paper presented at the SPE/DOE Symposium on Improved Oil Recovery, April 17–21, 2004
Paper Number: SPE-89390-MS
... droplets inside the capillary. This is thus an artifact, confirmed by the fact that this scattering disappears when water is injected. Disproportionate Permeability Reduction properties DPR properties can be quantified by comparing the relative permeability curves before and after adsorption...
Proceedings Papers

Paper presented at the SPE/DOE Symposium on Improved Oil Recovery, April 17–21, 2004
Paper Number: SPE-89404-MS
... Abstract For some polymer gels applied in reservoirs to control water flow, a favorable disproportionate permeability reduction (DPR) occurs in which permeability to water is reduced to a much greater extent than to oil. Also, when the gels are subjected to an applied pressure gradient partial...
Proceedings Papers

Paper presented at the SPE/DOE Symposium on Improved Oil Recovery, April 17–21, 2004
Paper Number: SPE-89393-MS
... before gel placement (0.3% versus 17.0%). Thus, oil trapping could not explain the large disproportionate permeability reduction ( F rrw / F rro =89). Gel dehydration and rehydration provide a viable explanation. In particular, paths may open during oil injection by partial dehydration of the gel...
Proceedings Papers

Paper presented at the International Symposium on Oilfield Chemistry, February 5–7, 2003
Paper Number: SPE-80205-MS
... was reduced. Note that permeability to oil increased 50-100% following the pressure cycle in Figure 1 . This is an indication of the elasticity of the gel structure. Abstract Disproportionate permeability reduction (DPR), in which water permeability is reduced to a much greater extent than oil...
Journal Articles
SPE Res Eval & Eng 5 (05): 355–364.
Paper Number: SPE-79717-PA
Published: 01 October 2002
... that to oil. However, the distributions of water and oil saturations (vs. pore size) were substantially different before, during, and after gel placement. This paper examines the mechanism for the disproportionate permeability reduction in the two porous media. Fig. 4 Scanning electron micrograph...
Journal Articles
Journal: SPE Journal
SPE J. 7 (01): 100–108.
Paper Number: SPE-77185-PA
Published: 01 March 2002
... of oil at the water saturation that is immobile after treatment. This phenomenon is called disproportionate permeability reduction (DPR) and is of interest because application of gel treatments in production wells has potential to reduce water production. The mechanisms that cause this phenomenon...
Journal Articles
J Pet Technol 53 (12): 39.
Paper Number: SPE-1201-0039-JPT
Published: 01 December 2001
...Dennis Denney This article is a synopsis of paper SPE 71510, "Segregated Flow is the Governing Mechanism of Disproportionate Permeability Reduction in Water and Gas Shutoff," by A. Stavland, SPE, and S. Nilsson, RF-Rogaland Research, originally presented at the 2001 SPE Annual Technical Conference...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 30–October 3, 2001
Paper Number: SPE-71510-MS
... Abstract This paper describes the mechanism for disproportionate permeability reduction (DPR). Recent papers have discussed possible DPR mechanisms. Most of the papers conclude that there is not yet a single factor that determines DPR. The intention of this paper is to clarify...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 30–October 3, 2001
Paper Number: SPE-71508-MS
... saturations (versus pore size) were substantially different before, during, and after gel placement. The disproportionate permeability reduction appeared to occur by different mechanisms in the two porous media. In Berea, gel caused disproportionate permeability reduction by trapping substantial volumes...

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