HOUSTON, July 30 /PRNewswire-FirstCall/ -- Apache Corporation (NYSE, Nasdaq: APA) said today that recent drilling results at the Horn River shale play of Northeast British Columbia have strengthened earlier estimates that individual horizontal wells in the play potentially can recover 10 billion cubic feet of natural gas. Three recent wells at Two Island Lake, operated by joint venture partner EnCana, have been brought on line at gross initial production rates of more than 16 million cubic feet (MMcf) per day and continue to produce 8-10 MMcf per day after two to three weeks.