Study of explosive stimulation in Devonian-shale gas wells

A comparison of explosive treatments in eight Devonian shale wells in Union District, Putnam County, WV is presented. Intervals of about 600 ft were shot with (1) 5-inch-diameter gelatin dynamite (6000 lb in 6-1/4 inch hole), (2) EL836 aluminized water gel explosive (12,000 lb in 6-1/4 inch hole) and (3) EL836 in an underreamed hole (37,500 lb in a 12-inch hole). Final open-flow data after treatment indicate substantially larger gas flows from the heavier charge-per-foot treatments. 2 figures, 2 tables.