Anisotropic soft porosity model for multiple facies types

Ellis, Michelle (RSI) | Kirstetter, Olivier (Repsol)


We present an anisotropic rock physics model which can be used to estimate velocities for different facies types (sands, shales and carbonates). The model uses a combination of the joint Self Consistent, Approximation and Differential Effective Medium model (SCA/DEM) and the Hudson model for fractures. The SCA/DEM model is used to build the frame of the rock and the Hudson model adds fractures in 3 orthogonal directions with varying concentrations inducing anisotropy. Allowing the model parameters to change gives enough flexibility to the model to model different facies including sands and carbonates. The model has been tested against sand, shale and carbonate data from well logs in the Barents Sea and the North Sea. Anisotropy for this well was estimated using the method of White (1983). Results show a good fit between the rock model and the data.

Presentation Date: Thursday, October 18, 2018

Start Time: 8:30:00 AM

Location: 202A (Anaheim Convention Center)

Presentation Type: Oral