Wedge Model

This model simulates the pressure response in a vertical well within a wedge-shaped reservoir with homogeneous or dual porosity characteristics as shown below. This well may be at any location within the reservoir and the model supports two no-flow boundaries. The reservoir is infinite-acting in the radial extent.

At early times, the wedge boundaries are modeled using the method proposed by Chen and Raghavan (1997), while late time is modeled using the infinite-acting radial solution. The result is superposed in time based on the rate history provided. Note that the dual porosity model provided is based on pseudo-steady state interporosity flow.

References

1. "The Application of the Laplace Transformation to Flow Problems in Reservoirs", A.F. van Everdingen and W. Hurst, Trans. AIME (1949) vol. 186, 305 - 324.

2. "Computing Pressure Distribution in Wedges," C.-C. Chen and R. Raghavan, SPEJ (March 1997) 24 - 32.