Bjørn Nyberg

NetworkGT: A GIS tool for Geometric and Topological Analysis of two-dimensional Fracture Networks

Björn Nyberg, Casey Nixon

Dimensions, arrangements, and interactions of individual fractures form fracture networks that control the mechanical and fluid flow properties of rock masses. Here we present NetworkGT, a toolbox designed to efficiently sample, analyse and map the geometrical and topological attributes of two-dimensional fracture networks. The algorithms are available in a familiar ArcGIS framework providing structural geologists an ability to easily map and analyse large fracture network analogs including fracture length distributions, orientations, frequencies and ternary topology plots. We will explore the rationale, methods and applicability of the NetworkGT toolbox in providing new opportunities in analysing the geometry and topology of fracture networks at a range of spatial and temporal scales important for the assessment of water, geothermal, hydrocarbon and/or CO2 reservoir viability. If interest exists, there may be an opportunity for a larger in-house workshop on the NetworkGT package.