..figured i'd share a couple interesting articles i just got http://www.semp.us/publications/biot_reader.php?BiotID=182 this deals with hydrocarbons too but more off topic http://online.wsj.com/article/SB10001424052748704717004575268302434395796.html?mod=WSJ_hpp_sections_news -brian -- http://208.53.138.125:8068/ [blinders off&earplugs out]