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Shear induced structure additives and nonlinear pressure drop effects in permeable flow.
David Spain1, Sebastiaan Troost, Michael Golombok
1Shell International Exploration and Production, Kessler Park 1, 2288 GS Rijswijk, The Netherlands.
Journal of Colloid and Interface Science
|July 14, 2009
Summary
Adding shear-induced structure materials to rock retards flow. Measuring pressure distribution revealed how additive concentration affects flow and how flushing with water restores it, dependent on shear forces.
Area of Science:
- Geology
- Materials Science
- Fluid Dynamics
Background:
- Classical flow through permeable rock exhibits linear pressure distribution.
- Controlling fluid flow in porous media is crucial for various industrial applications.
- Shear-induced structure materials offer a method to modify rock permeability.
Purpose of the Study:
- To investigate the impact of shear-induced structure materials on fluid flow in permeable rock.
- To analyze the spatial pressure distribution along the core under varying additive concentrations.
- To determine the reversibility of flow retardation and the role of shear in material breakdown.
Main Methods:
- Utilized a novel core holder for precise measurement of axial pressure distribution.
- Introduced shear-induced structure materials (surfactant/co-solute pairs) into higher permeability rock samples.
- Conducted flushing experiments with water to assess flow recovery.
Main Results:
- Observed spatial variations in pressure drop correlated with additive concentration.
- Demonstrated that flushing with water restores original flow levels.
- Established that the rate of flow recovery is shear-dependent, indicating shear-induced breakdown of deposited materials.
Conclusions:
- Shear-induced structure materials effectively retard flow in permeable rocks.
- The pressure distribution and flow retardation are controllable via additive concentration.
- Flow can be restored by flushing, with the efficiency dependent on applied shear forces, highlighting the material's shear-sensitive nature.
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