The US active rig count rose by 7 last week to 580, according to Baker Hughes' weekly survey. Canada's count moved the other way, falling by 7 to 190.

Permian and Cana Woodford drive the US gain

Two of the major basins Baker Hughes tracks individually added rigs this week. The Permian climbed by 3 to 261 rigs, the largest total in the report by a wide margin. The Cana Woodford added 1 rig to reach 20. The Williston was the only tracked basin to lose rigs, falling by 1 to 27. Every other basin held steady, including Haynesville at 55, Eagle Ford at 44, Marcellus at 24, and Utica at 12.

Major basin rig counts

Basin Rigs Change
Permian 261 +3
Cana Woodford 20 +1
Haynesville 55 0
Eagle Ford 44 0
Marcellus 24 0
Williston 27 -1
Granite Wash 19 0
Utica 12 0
DJ-Niobrara 9 0
Ardmore Woodford 2 0
Arkoma Woodford 1 0
Barnett 0 0
Mississippian 0 0

All basins outside this table also held steady, Baker Hughes said.

Canada's count falls

Canada's rig count fell by 7 to 190 this week.

The named basins above add up to a net gain of 3 rigs: the Permian and Cana Woodford's combined gain of 4, minus the Williston's loss of 1. The national total rose by 7.