Good Morning and Happy Mother's Day to all!
I was doing some browsing at the Louisiana DNR website and found this interesting
from CB&I dated May 1.
First, a new graphic showing general locations of seismic activity.
Yes, some of the microquake activity is well east of the sinkhole, in/around/above/under? Oxy#2, and getting darn close to Crosstex #2 (isn't that the
one that held Butane? Is it now empty?).
This next image shows preliminary locations of individual EQ's, but it is still hard to read--it's easier to open the .pdf above and zoom in quite a
The red dots are Pre-sinkhole quakes.
The orange dots are pre- 19 January 2013.
The purple dots are post- 19 January 2013.
The blue X's say "Oxy 1 microseismic" on the legend (I guess that means very small earthquakes picked up by the Oxy 1 Array?--It's not clear to me
(and that is probably very purposeful by CB&I)).
(click for larger)
Here are a few other tidbits from the update linked above.
From page 7 of the report:
– Cavern bottom tag at 3919 feet TVD, 119 feet of cavern remaining as of April 6
– Multiple seismic events in April
– Cavern pressures have stabilized at around 500 psi and so far brine removal has been unable to reduce them
From page 11:
Current sinkhole area—15.1 acres (defined by -10 foot depth contour)
Total settlement area—37.5 acres
Area increased 2.7 acres in past month and volume increased 300,000 yd3
Western 60 feet of Oxy 3 pad collapsed in late March and early April
There is more info in the report concerning the methane and nat gas.
ETA: The fact that microquakes have been located farther toward the center of the salt dome really doesn't give us any useful information, because we
don't know at what depths they are occurring. It could be in the cap rock above the salt, in the salt, or well below it.
I guess we can be fairly certain they aren't
happening 50 miles down, and that's about it.
edit on 5/12/2013 by Olivine because: hypertext issues
edit on 5/12/2013 by Olivine because: (no reason given)