The majority of the news on unconventional plays has come from North America, but that trend is beginning to change.In mid-August, Halliburton performed the first shale hydraulic fracturing operation in Poland for state-owned PGNiG, which contracted Halliburton to fracture the Markowola-1 exploratory well near Kozienice in eastern Poland to determine if the site contained commercial gas deposits.Australia reportedly is evaluating shale gas potential in Queensland, where identified resources are estimated at 7.5 Tcf of gas in place, with 2.3 to 3.6 Tcf deemed commercial with existing technology.Meanwhile, China (which according ...