Canada’s EnCana Oil & Gas became the first company to cut back on a drilling program because of increasing service and supply costs, according to the Fort Worth Star-Telegram. The company released four of the 12 rigs it had working the Barnett Shale in north Texas. Rig costs have climbed to between $20,000 and $22,000 a day about tripe the rate 3 years ago. EnCana is the fourth largest producer in the Barnett Shale play with 35 Bcf of gas produced in 2005. The company also will shut cut back on tight-formation drilling in Colorado and Wyoming.