Gas production potential determined by Dye leachback

Dye leachback is a simple, inexpensive technique for locating formations with gas production potential using rotary or cable-tool cuttings obtained at the well site during drilling. The process itself is field adaptable and can produce a permeability profile while the drilling is proceedings. Dye leachback is not only quicker than standard logging techniques, but gives information that heretofore has been unavailable. Although logging tools exist that indirectly measure permeability, these tools are not always reliable. Direct permeability measurements made in a laboratory on whole or sidewall cores are much more expensive and very time consuming.