North Dakota, the second-largest oil-producing state in the U.S., expects output to surge through the summer as more benign weather gives roughnecks extra time to work in the field.
Output rose about 3.6 percent to 1.04 million barrels a day in May, the state’s Department of Mineral Resources reported yesterday. It was the largest increase since August.
The growth came even as rain and high winds kept well- completion crews out of the fields for several days during the month. Better summer weather will lead to production growth in the region of 5 to 6 percent a month in June, July and August, said Lynn Helms, director of the state’s Department of Mineral Resources.
“We still expect the big surge to come in June, July and August in terms of completions and some really rapid production increases,” Helms said on a conference call with reporters yesterday.
North Dakota is home to the majority of the Bakken shale formation, an underground layer of oil-and-gas-rich rock. High oil prices and improvements in horizontal drilling and hydraulic fracturing technologies have helped output from the state’s portion of the Bakken rise fivefold over the past five years.
Texas, which extracts more than 3 million barrels a day, is the only state producing more crude. North Dakota pumped more oil than three OPEC member nations in May.
Shale wells like those in the Bakken tend to have faster declines in output than traditional wells so it’s necessary for crews to bring more and more wells online each month to make up for the drop and keep production growing.
Creating wells in the Bakken is a two-step process. Drillers make horizontal bores along the shale, and then completion teams inject a high-pressure mixture of water, chemicals and sand to create micro-fissures in the rock through which gas and oil can seep. Bad weather can slow the completion process, curbing production growth.
“During most years you’re going to see a certain amount of seasonality, whether it be weather delays due to cold temperatures in the winter, or when spring rolls around and you see high winds,” Jonathan Garrett, an upstream analyst for Wood Mackenzie Ltd., said by phone from Houston. “When you get to June, July and August you’ll see this acceleration that makes up for the dips earlier in the year.”