LINN built its nonoperated acreage position to approximately 23,000 net acres in the Williston Basin through three acquisitions that closed mid-year 2011. In 2011, we participated in 65 gross Bakken wells with working interests averaging 6 percent. In the fourth-quarter 2011, daily production from the Bakken increased 40 percent over production at the time of the acquisitions. In 2012, we plan to participate in approximately 100 gross horizontal wells, with an average working interest of 7 percent.
This entry into the Williston Basin provides us with a foothold position in a premier oil basin with vast resource potential. We are partnering with high-quality operators that have extensive operating experience in the area. This is enabling us to accelerate our knowledge in the play, while reducing execution risk in the development of more than 800 horizontal drilling opportunities.