Dropping nodes from a supply vessel
“While the node market has evolved in the sense that individual nodes have become smaller and therefore lighter to handle”, a completely new way of operating these devices has not…
Worldwide
Your ChatGPT-powered personal subsurface document assistant
During meetings, we often encounter detailed and specific questions, such as whether a particular well had shows in the Jurassic, why a licence was relinquished, or if there are any…
Machine learning validation – An often understated requirement in geophysics
Deep learning is a subset of machine learning, which entails a neural network with three or more layers. It is thanks to deep learning that applications from fault picking to…
Is it possible to differentiate between meandering and braided river deposits using gamma-ray logs?
For most people working in subsurface teams, discussions related to the interpretation of depositional facies on the basis of well logs are part of the daily routine. The more geologists…
Pumped geothermal power projects – a global overview
Pumped-well geothermal projects utilise the moderate temperature range of geothermal fluids between 100-190 C. Below this temperature, geothermal fluids are generally used for direct heating and above this the fluids…
Seismic acquisitions focus on mature hydrocarbon provinces
As always, conferences are great places to gauge the state of play of the industry. Yesterday, I talked to several people with good insight into the seismic acquisition business at…
Swimming in subsurface data – on YouTube
A new way of providing subsurface intelligence is the use of videos compiled by geoscientists. Sharing content in this way can be rewarding but daunting at the same time. That…
Well logs and facies interpretation – Who gets it right?
For most people working in subsurface teams, discussions related to the interpretation of depositional facies on the basis of well logs are part of the daily routine. The more geologists…
Sequences, sea-level curves and predictive power: Assuming simplicity does not correctly predict complexity
Pre-drill predictions of basin-fill strata, in the absence of substantial supporting data, have been a key objective of seismic and sequence stratigraphic methods including global sea-level curves since the original…
Swimming in subsurface data
In the UK, it is not that long ago that people had to go to the Department of Energy and Climate Change – which is now the North Sea Transition…
More wells should be drilled with water-based mud
“All cuttings brought to surface need to be shipped ashore when they are contaminated with oil-based mud (OBM)”, says Anita Hansen in a recent conversation. Anita has decades’ worth of…
A new global sea-level curve
Traditional long-term eustatic sea-level reconstructions suffer from uncertainty in stratigraphic interpretations of the rock record, which leads to ambiguity. Sea-level reconstructions from plate tectonic modelling are limited in use due…