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The global energy sector from a subsurface perspective

Geology & Geophysics

Carboniferous-Permian erosive contact, Kowala Quarry, Poland

Karol Jewuła, Bizon Geological Consulting
A spectacular erosive contact between Permian continental conglomerates and Lower Carboniferous marine strata can be observed at the Kowala Quarry in the Świętokrzyskie Mountains, Poland, situated in the southeastern part…

Deciphering Earth’s secrets

Molly Turko - Devon Energy
Faults on geolog­ical maps are far more than just lines; they are a critical form of communication, conveying essential infor­mation about the Earth’s subsurface structure and tectonic history. Central to…

Tectonically-influenced carbonate platform, Greece

Arve Lønøy, Lonoy Geoconsulting
A Pliocene carbonate platform (Rhodos Formation) is exposed in the NE part of the isle of Rhodes, Greece. Sedimentation was largely controlled by faulting relating to a late Pliocene or…

On the HUNT for Somalian core

Henk Kombrink
“Having worked on the first-ever offshore seismic survey in South Yemen in 1976, and seen the results of the first offshore well drilled in Yemeni waters, south of Socotra Island,…

Is it a true conjugate fracture set?

Molly Turko - Devon Energy
Conjugate faults or frac­tures are a set of shear frac­tures that formed simul­taneously under the same stress conditions. According to Ander­sonian Fault Theory, this could involve a series of left-lateral…

How we become geologists

Juan Cottier, MMbbls Subsurface Consulting
Q: How do you know if someone is from the Isle of Man? A: Because they insist on telling you every five minutes! Every geologist has a story as to…

Fault-valve behaviour of petroleum traps

Arjan Brem, Structural Geology Consultant
When evaluating fault-bound traps, it is common practice to map around-the-fault pathways through diligent seismic interpretation, juxtaposition diagrams, and 3D structural framework construc­tion. It is also common practice to ad­dress…

The geology of Bronze Age epics

Juan Cottier, MMbbls Subsurface Consulting
A New Year brings new challeng­es, and for me, that means writing for GEO EXPRO. I am writing after the Xmas break which is tradition­ally eating, drinking and watching old…

A legacy of hyperpycnal flows

Marcos Asensio
Illustration by: Marcos Asensio. The cretaceous U and T sandstones, key petroleum reservoirs in the Oriente Ba­sin of Ecuador, have been the focus of a groundbreaking reinterpre­tation. Recent studies of…