Radial Flow — Lesson 4

This lesson covers the application of Darcy's law in Mass Continuity and the extraction of pressure-velocity information at different points. It delves into the concept of mass continuity in Cartesian and cylindrical coordinates and the derivation of the pressure equation. The lesson further explains the calculation of radial velocity at any point and the total flow from sand into the well. It also discusses the impact of permeability variation on the flow and pressure in porous media. For instance, the lesson illustrates how clay swelling or fine particle migration can affect permeability during water injection.

Video Highlights

01:58 - Calculation of radial velocity
03:16 - Understanding total flow from sand into the well
16:23 - Discussion on the impact of permeability variation
28:13 - Explanation of stimulation techniques for oil and gas reservoirs

Key Takeaways

- Darcy's law can be applied in Mass Continuity to extract pressure-velocity information at different points.
- The pressure equation can be derived from mass continuity in Cartesian and cylindrical coordinates.
- The radial velocity at any point can be calculated using the pressure equation.
- The total flow from sand into the well can be determined by considering the radial velocity and the area over which it operates.
- Permeability variation, due to factors like clay swelling or fine particle migration, can significantly impact the flow and pressure in porous media.