Estimation of Shale Reservoir Properties Based on Anisotropic Rock Physics Modelling

In our study, an improved anisotropic rock physics model has been built. The kerogen in shale is simulated using anisotropic SCA+DEM theory. The pore space of shale is divided into ductile pores and brittle pores in terms of clay volume. A new parameter, the standard deviation of the distribution function, is introduced to model the lamination of shale.

For data analysis, a new 3D template method is introduced to take the mineralogy effect into consideration, which makes the model more realistic than the usual methods. A real shale data set from Southwest China has been analysed using our model. Reservoir properties like pore aspect ratio which indicates the microstructure of reservoir, Thomsen anisotropic parameters and S wave velocity, have been predicted using the 3D template. The predicted results coincide well with the measured data.