Monday, January 30, 2017

KFSM Earthquake Insurance Interview

Just finished an interview with Charlie Hanna of KFSM channel 5 in Ft. Smith, AR. Topic was earthquake insurance. It will air sometime in the next couple of days. Below is my whiteboard drawing made for the interview.

Explanation of the figure: In N and NE Oklahoma horizontal wells are drilled into unconventional reservoirs, typically the Mississippian Lime. These wells produce vast quantities of formation (salt) water mixed with a small percentage of oil. The oil is separated and the water needs to be disposed. For this purpose a deeper nearby vertical salt water disposal well pumps the water down into the 500 million year old Arbuckle formation that sits on granite basement rocks. The basement and Arbuckle often have ancient inactive faults from continental collisions that formed the North American continent. Salt water injection that is too rapid, at too high a pressure or from wells too close together can reactive the faults and be felt as earthquakes. The earthquake waves radiate out from the fault and, sometimes, can be felt 100 miles away in Fayetteville, AR where I live. The hilly terrain of NW Arkansas scatters and focusses the earthquake waves so that the felt effect varies widely from one neighborhood to the next.

Sketch of NE OK earthquake as felt in Fayetteville, AR

Sunday, January 29, 2017

Seismic interpretation bootcamp

Yesterday I taught a 1-day seismic interpretation bootcamp short course for the Tulsa Geological Society. Everyone worked on their own laptop running OpendTect software and the Netherland's offshore F3 Demo data from the dGB website.

Kudos to Shane Matson for organizing and the 25 who attended. Lots of familiar faces in the room, including Dick Banks, Jamie Woolsey, and Eric Gross. The OSU-Tulsa campus as an excellent venue. It was a great day!

Bootcampers using OpendTect in Tulsa.
Bootcamp advertisement

Thursday, January 26, 2017

Lyell and Darwin

As some Seismos readers know, a passion of mine is collecting rare books. I have been at it since the late 1970s and now have about 120 titles that one could term rare.

The photo above is a very nice part of the collection, completed only this week with he addition of Charles Darwin's The Origin of Species. The 1876 version of the 6th edition of Origin is the basis for all modern reprinting of his most famous book. It was the last edition edited by Darwin himself before his death in 1882. Only 1250 copies were printed, making 1876 the smallest print run except the 1859 first edition of Origin that also numbered 1250.

Charles Lyell was an older contemporary of Darwin and a close colleague. They are together again on my bookshelf.

From left-to-right in the photo, we have:

Lyell, 1834, Principles of Geology, 4 vol (3rd ed)
Lyell, 1885, Students Elements of Geology (4th ed)
Lyell, 1865, Elements of Geology (6th ed)
Lyell, 1871, Geological Evidences of the Antiquity of Man (1st ed)
Darwin, 1876, The Origin of Species (6th ed)
Darwin, 1871, The Descent of Man (1st ed, 2nd issue)

A rather shabby first edition of Origin sold at Sotheby's in December 2016 for $102K.