Abstract
Sufficient evidence exits to :;ugge nt that miL;inter-pretation of wcll- ::ite ga:; detection data i:; quite common. The question in often asked,. "How bir; a ga:; kick -hould I expect to get from a zone that will make a well?" Such mi:;understanding may often be traced to a lack of familiarity with the funda- mental principles of gas detection and interpretation.