Subsurface science in oil and gas: geology, geophysics, petrophysics, reservoir engineering. Occasionally off-topic.
Agile*'s Latest Posts
Most kind of mining are low-yield games. For example, the world's annual gold production would fit in a 55 m2 room. But few mining operations I'm aware of are as low yield as the one that ran in Melle, France, from about 500 till 950 CE, producing silver for the Carolingian empire and Charlemagne's coins. I visited the site on Saturday. The tour made it clear just how hard humans had to work to bring about commerce and industry in the Middle Ages. For a start, of course they had no […]
We're organizing another hackathon! It's free, and it's for everyone — not just programmers. So mark your calendar for the weekend of 25 and 26 October, sign up with a frie, and come to Denver for the most creative 48 hours you'll spend this year. Then stay for the annual geophysics fest that is the SEG Annual Meeting! First things first: what is a hackathon? Don't worry, it's not illegal, and it has nothing to do with security. It has to do with ideas and collaborative tool […]
Well, OK, Leonardo da Vinci wasn't actually there, having been dead 495 years, but on Tuesday morning I visited the house at which he spent the last three years of his life. I say house, it's more of a mansion — the Château du Clos Lucé is a large 15th century manoir near the centre of the small market town of Amboise in the Loire valley of northern France. The town was once the royal seat of France, and the medieval grandeur still shows. Leonardo was invited to […]
As you may know, I like going to conferences outside the usual subsurface circuit. For this year's amusement, I spent part of last week at the annual Wikimania conference, which this year was in London, UK. I've been to Wikimania before, but this year the conference promised to be bigger and/or better than ever. And I was looking for an excuse to visit the motherland... What is Wikimania? Wikipedia, one of humanity's greatest achievements, has lots of moving parts: All the amazing content on […]
After reading Chris Liner's recent writings on attenuation and negative Q — both in The Leading Edge and on his blog — I've been reading up a bit on anisotropy. The idea was to stumble a little closer to writing the long-awaited Q is for Q post in our A to Z series. As usual, I got distracted... In his 1994 paper AVO in tranversely isotropic media—An overview, Blangy (now the chief geophysicist at Hess) answered a simple question: How does anisotropy affect AVO? Stigler's law […]
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