should flow gas, page-9

Hi picko99,

sorry about the carbonate ,

in sandstone new tichnics are being used such as
Alcoholic mud acid, a hydrofluoric-hydrochloric acid mixture containing alcohol, is proving highly successful in stimulating production from problem wells in sandstone formations. Primary advantage of this acid is the better and more rapid clean-up properties provided by the added alcohol. It is particularly useful in gas-producing formations, but has proved effective in oil-producing formations as well. Many acid treatments in sandstone which would otherwise be successful are spoiled by the very slow spent-acid clean-up. This clean-up problem has also often had the result of water block in the critical matrix surrounding the well bore. The addition of alcohol to the acid can often prevent this water blocking problem and also can impart other desirable properties to the acid. Alcohols in gas wells are more effective in many cases than surface-active agents. Surface-active agents adsorb on sand grains and clays to penetrate only a short distance as acid enters the formation. One very important feature of alcohol is that it penetrates deeply, then remains in the spent-acid solution returned to the well bore.

looking forward to next week .