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Drilling Productivity Report

Release Date:  April 14, 2014  |  Next Release: May 12, 2014  |  full report

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New-well oil production per rig
barrels/day
New-well gas production per rig
thousand cubic feet/day
Region April 2014 May 2014 change   April 2014 May 2014 change
Bakken 492 499 7   497 505 8
Eagle Ford 463 470 7   1,279 1,285 6
Haynesville 23 23 -   5,168 5,230 62
Marcellus 30 30 -   6,455 6,501 46
Niobrara 344 352 8   1,540 1,554 14
Permian 109 110 1    273 276 3
Rig-weighted average 259 262 3   1,369 1,343 (26)
Oil production
thousand barrels/day
Gas production
million cubic feet/day
Region April 2014 May 2014 change   April 2014 May 2014 change
Bakken 1,034 1,055 21   1,215 1,239 24
Eagle Ford 1,351 1,382 31   6,696 6,811 115
Haynesville 53 53 -   6,604 6,615 11
Marcellus 40 41 1   14,520 14,773 253
Niobrara 306 311 5   4,144 4,169 25
Permian 1,441 1,454 13    5,347 5,386 39
Total 4,225 4,296 71   38,526 38,993 467


The Drilling Productivity Report uses recent data on the total number of drilling rigs in operation along with estimates of drilling productivity and estimated changes in production from existing oil and natural gas wells to provide estimated changes in oil and natural gas production for six key fields. EIA's approach does not distinguish between oil-directed rigs and gas-directed rigs because once a well is completed it may produce both oil and gas; more than half of the wells produce both.

While shale resources and production are found in many U.S. regions, at this time EIA is focusing on the six most prolific areas, which are located in the Lower 48 states. These six regions accounted for nearly 90% of domestic oil production growth and virtually all domestic natural gas production growth during 2011-12.

key tight oil and shale gas regions