The Zagros uplift
“We climbed for most of that day, conquering step by step the Morvarid Pass, only to drop down again, having reached the top; and as evening fell we came down…
Technology
Advances in Deepwater Reservoir Monitoring
With the market for Permanent Reservoir Monitoring (PRM) continuing to grow along with deepwater field expenditure (Douglas-Westwood forecasts global deepwater CAPEX of US$225 billion between 2011 and 2015), TGS company,…
Marine Seismic Sources Part XI: Effect of Seismic on Crabs
In previous editions of GEO ExPro we have discussed the effect of seismic shooting on mammals and fish. What about animals without ears, like the crab? In this article, we…
Solving Hydraulic Fracturing ‘Controversies’
Hydraulic fracturing has unlocked a vast, new oil and gas resource from very tight rocks. Innovative developments in nanotechnology are poised to make hydraulic fracturing more efficient, accountable, and much…
Marine Seismic Sources Part X: Seismic Surveys and Fish
The possible effects of seismic surveys on fish and fisheries have been given a great deal of media attention in Norway. Here, we summarise results from the Fish Rock experiment…
Gas Hydrates – Part I: Burning Ice
Scientists have known and studied natural gas hydrates for decades. Vast deposits of hydrates have been found, both in the permafrost and the continental shelves of the oceans of the…
Marine Seismic Sources – Part XII: Sound in the Sea
“If you cause your ship to stop and place the head of a long tube in the water, you will hear ships at a great distance from you.” – Leonardo…
Longer Runs at Higher Speeds
Maximising fixed cutter bit performance in shales and carbonates. Fixed cutter bits – generally termed PDC bits for their poly-crystalline diamond cutters – have been achieving high rates of penetration…
Bringing the Lab to the Field
Bringing advanced laboratory analysis to the field: Weatherford International’s new formation evaluation service brings advanced, laboratory-based testing techniques to the field, enabling faster, more informed reservoir management decisions for unconventional…
Working Under Pressure
Working under pressure may not be everyone’s ideal job, but Richard Swarbrick and his team at Ikon GeoPressure at Durham in the north-east of England are doing it all the…
The Ups and Downs of Eustatic Sea Level Change: Review and Applications
Eustatic sea level change is a subject much debated in the literature. But what is eustasy, can it be recognised, what controls it – and why does it matter to…
Gas Hydrates – Part II: Rock Physics, an Introduction
Most oceanic gas hydrates are mapped using seismic data. How much do key seismic parameters vary from a hydrate rock to a water-saturated rock? Should the hydrate be considered as…