BP's Gulf oil well cap test could be extended past 3 p.m. today to better understand pressure readings, Times-Picayune, July 18, 2010:
[S]eismic mapping of the subsurface by ships steaming around the well... is actually delaying the completion of alternate plans to locate vessels above the well to capture additional oil if the cap doesn't work, Suttles said. The vessels
must be moved out of the way each time a test is done. Suttles said the delays were not a significant problem...
The seismic tests are looking for indications that oil and gas are flowing away from the well into a subsurface formation.