Abstract: A method for reducing the time during which steam moves in a lateral direction between two parallel superimposed horizontal wells when utilizing a Steam Assisted Gravity Drainage (SAGD) process. Foam is added while injecting steam into an upper horizontal well once steam breakthrough occurs in an interwell region. Foam enters the interwell region thereby causing an increased pressure gradient. This increased pressure gradient adds to the gravity force thereby providing a greater interstitial oil velocity which increases oil drainage between wells during startup.

Abstract: A process for preparation of alkyl carboxylate mixtures enriched in alpha-methylalkyl carboxylate compounds, by reaction of an olefin and a carboxylic acid compound in the presence of a mordenite catalyst.