Steven Ogilvie
Natural Fracture Types in Fractured Reservoirs

There are 2 basic types of natural fractures that need to be studied when characterising naturally fractured reservoirs - whether it be a geothermal or hydrocarbon reservoir. These are extension and shear fractures.

Natural Fracture Types in Fractured Reservoirs
Faults, Folds
Steven Ogilvie
Thrust systems at different scales

This blog examines some key features of thrust systems with an example from seismic data offshore Namibia and from a hand specimen onshore UK.

Thrust systems at different scales
Fractures, joints
Steven Ogilvie
Deformation band contained Joints

This blog looks at joints contained within zones of deformation bands - how they form and if they are important or not.

Deformation band contained Joints
Fractures
Steven Ogilvie
Geomechanics approach to fracture prediction

This blog describes the value of a geomechanical approach to fracture prediction; for example thin beds often have more fractures than thick beds.

Geomechanics approach to fracture prediction
Deformation Bands, Faults
Steven Ogilvie
Deformation Bands in Permian Sandstones, ...

This blog looks at some key features of zones of deformation bands. Featured are 2 outcrops of Permian age sandstone from Scotland, UK.

Deformation Bands in Permian Sandstones, Scotland, UK.

matrix blocks

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Classification of Naturally Fractured Reservoirs

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Classification of Naturally Fractured Reservoirs

Fractured reservoirs are often dual porosity systems where the fractures provide an additional porosity to the matrix. Nelson provides a valuable classification of fractured reservoirs based upon relative contribution of matrix and fractures to porosity and permeability.