New permits, which indicate what drilling rigs will be doing 60-90 days in the future, showed steep declines for the first time this year across the top three U.S. onshore fields: the Permian Basin and Eagle Ford in Texas and North Dakota's Bakken shale.
The Permian Basin in West Texas and New Mexico showed a 38 percent decline in new oil and gas well permits last month, while the Eagle Ford and Bakken permit counts fell 28 percent and 29 percent, respectively, the data showed.
That slide came in the same month U.S. crude oil futures fell 17 percent to $66.17 on Nov. 28 from $80.54 on Oct. 31. Prices are down about 40 percent since June.
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U.S. prices fell below $70 a barrel last week after the Organization of Petroleum Exporting Countries agreed to maintain output of 30 million barrels per day. Analysts said the cartel is trying to squeeze U.S. shale oil producers out of the market.
Total U.S. production reached an average of 8.9 million barrels per day in October, and is expected to surpass 9 million bpd in December, the highest in decades, according to the U.S. Energy Information Administration.
Gilmer said last month's pullback in permits was more about holding off on drilling good locations in a low-price environment than breaking even on well economics.