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.
Stylolites
Steven Ogilvie
Stylolites in Sandstones

This blog focuses upon stylolites which are structures that either form during burial or by later tectonic movements and have a serrated appearance on rock surfaces.

Stylolites in Sandstones

Seismic interpretation

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Impact of Relay Ramps

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Impact of Relay Ramps

Relay ramps can create communication between fault blocks during an oil field development. Here we look at some examples and other types of segmentation which occur in weaker rocks.

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Construct Fault under Rollover Anticline

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Construct Fault under Rollover Anticline

Rollover anticlines are common types of folds in extensional basins. The shape of the rollover is related to the shape of the underlying listric fault. This is useful to know as the fault may be poorly imaged.

Here we describe a simple (by hand) construction that can be performed on a seismic section - to reduce interpretation uncertainty