Fract_004 Homogenisation of Flow Properties in Jointed Model

Introduction

 

The aim of this tutorial example is to recover effective flow permeability based on a target solution of a discrete model using ParaGeoInv, as illustrated below. We demonstrate homogenisation of the permeability properties using two methods, i.e., ubiquitous upscaled fracture (UUF) approach via Material_data and spatially embedded fracture (SEF) approach via Fracture_data. The latter coincides with the spatial distribution of fractures in the discrete model. Overview of ParaGeoInv and the inverse analysis and data structures are provided in ParaGeoInv Reference Manual. Undertaking of GeoInv Tutorial Examples prior to the present example is also recommended.

 

The following table shows the fluid volume and flow rate on "west" and "north" geometry sets as target solution.  The reference solution used to generate the target measurements is also provided to allow for comparisons. The data and results are in Fract_004\Reference Solution.

 

Geometry Set

Fluid Volume (m3)

Fluid Volume Flow Rate (m3/Ma)

west

244.439

488.878

north

295.113

590.226

 

fract_004_fig1

Fig. 1 Pore pressure distribution on midplane of discrete model

 

 

 

Simulation Cases

 

Case01 Ubiquitous Upscaled Fracture (UUF)

 

Case02 Spatially Embedded Fracture (SEF)