I would think your language skills in the oil/gas industry would be a huge asset. Are you British? If so, I\'d say go for it! As Spain desperately needs business-English teachers.
To be honest, I have heard that there is ageism is Spain---although I\'ve never seen anyone turned down because of age. Yet, there aren\'t many 45+ people in the field, but I have always associated this with the fact that 45+ are settled, whereas most people teaching English in SPain (coming from US or Britain) are unsettled and just planning on staying a year.
If I were you and had a very positive attitude, I\'d vacation there for a month in say, September, and try to get some interviews. See what happens. AND LET US KNOW!!!!!!
Good luck! And remember to push the "business" lingo! [IMG SRC=\"modules/phpBB_14/images/smiles/icon_wink.gif\"] [addsig]