BARRELS

FORMATION OIL PRODUCED PERCENT WELLS*

Bakken 659736 2.0248 205

Bakken/Three Forks 60 0.0002 1

Birdbear 993772 3.0501 40

Cambro/Ordovician 21905 0.0672 2

Dawson Bay 73496 0.2256 3

Devonian 1187675 3.6452 53

Duperow 1309209 4.0182 114

Gunton 13571 0.0417 1

Heath 471575 1.4473 58

Lodgepole 7039957 21.6069 29

Madison 11543842 35.4301 2052

Midale/Nesson 295015 0.9055 15

Ordovician 503797 1.5462 42

Ratcliffe 27171 0.0834 3

Red River 1746937 5.3617 188

Red River "B" 3857249 11.8386 201

Red River "C" 2444 0.0075 1

Sanish 74290 0.2280 13

Silurian 830629 2.5493 69

Souris River 3071 0.0094 1

Spearfish 14398 0.0442 8

Spearfish/Charles 555421 1.7047 115

Spearfish/Madison 54732 0.1680 38

Stonewall 448337 1.3760 39

Tyler 748025 2.2958 43

Winnipeg 1813 0.0056 1

Winnipeg/Deadwood 2240 0.0069 3

Winnipegosis 101665 0.3120 15

1999 TOTAL 32582032 3353

*Well count for December 1999.

1999 NORTH DAKOTA OIL PRODUCTION BY FORMATION
BARRELS

FORMATION OIL PRODUCED PERCENT WELLS*

Bakken 618852 1.9091 199

Birdbear 1748888 5.3952 49

Birdbear-Duperow 10442 0.0322 1

Cambro/Ordovician 15656 0.0483 2

Dawson Bay 45019 0.1389 3

Devonian 1357086 4.1865 56

Duperow 1256856 3.8773 114

Heath 411722 1.2701 54

Lodgepole 6155186 18.9883 29

Madison 11829851 36.4942 2085

Midale/Nesson 206586 0.6373 18

Ordovician 448049 1.3822 43

Ratcliffe 25293 0.0780 3

Red River 1962262 6.0534 188

Red River "B" 3030501 9.3489 186

Red River "C" 1502 0.0046 1

Sanish 74624 0.2302 13

Silurian 803521 2.4788 69

Souris River 28721 0.0886 1

Spearfish 14057 0.0434 9

Spearfish/Charles 576377 1.7781 119

Spearfish/Madison 61796 0.1906 40

Stonewall 583486 1.8000 46

Tyler 727804 2.2452 44

West Red River 237191 0.7317 25

Winnipeg 142 0.0004 1

Winnipeg/Deadwood 1879 0.0058 3

Winnipegosis 182350 0.5625 19

2000 TOTAL 32415699 3420

2000 NORTH DAKOTA OIL PRODUCTION BY FORMATION
BARRELS

FORMATION OIL PRODUCED PERCENT WELLS*

Bakken 584176 1.8627 201

Birdbear 1467437 4.6790 56

Birdbear-Duperow 10182 0.0325 1

Cambro/Ordovician 17756 0.0566 2

Dawson Bay 41825 0.1334 3

Devonian 1339888 4.2723 58

Duperow 1163196 3.7089 119

Heath 368397 1.1746 51

Lodgepole 5104797 16.2768 29

Madison 12170971 38.8075 2106

Midale/Nesson 137209 0.4375 18

Ordovician 423979 1.3519 43

Ratcliffe 23538 0.0751 4

Red River 2016983 6.4312 197

Red River "B" 3008420 9.5924 204

Red River "C" 343 0.0011 1

Sanish 77412 0.2468 14

Silurian 817243 2.6058 62

Souris River 8674 0.0277 1

Spearfish 13668 0.0436 9

Spearfish/Charles 586291 1.8694 117

Spearfish/Madison 54757 0.1746 34

Stonewall 650300 2.0735 49

Tyler 659186 2.1018 47

West Red River 171168 0.5458 21

Winnipeg/Deadwood 1559 0.0050 3

Winnipegosis 443071 1.4127 21

2001 TOTAL 31362426 3471

2001 NORTH DAKOTA OIL PRODUCTION BY FORMATION
BARRELS

FORMATION OIL PRODUCED PERCENT WELLS*

BAKKEN 560323 1.8394 195

BAKKEN/THREE FORKS 321 0.0011 2

BIRDBEAR 894038 2.9349 57

CAMBRO/ORDOVICIAN 14284 0.0469 3

DAWSON BAY 44597 0.1464 4

DEVONIAN 1316345 4.3212 58

DUPEROW 1041147 3.4178 118

GUNTON 4745 0.0156 2

HEATH 301519 0.9898 48

LODGEPOLE 4532007 14.8774 30

MADISON 12259235 40.2438 2094

MIDALE/NESSON 101978 0.3348 20

MISSION CANYON 1245 0.0041 2

ORDOVICIAN 684768 2.2479 48

RATCLIFFE 20362 0.0668 5

RED RIVER 1991776 6.5385 188

RED RIVER B 3516273 11.5430 249

SANISH 70137 0.2302 14

SILURIAN 775085 2.5444 66

SOURIS RIVER 1112 0.0037 2

SPEARFISH 12959 0.0425 11

SPEARFISH/CHARLES 557930 1.8315 115

SPEARFISH/MADISON 55714 0.1829 38

STONEWALL 546419 1.7937 44

TYLER 577833 1.8969 48

TYLER A 34090 0.1119 6

WEST RED RIVER 162982 0.5350 22

WINNIPEG/DEADWOOD 1685 0.0055 4

WINNIPEGOSIS 381495 1.2523 21

2002 TOTAL 30462404 3514

2002 NORTH DAKOTA OIL PRODUCTION BY FORMATION

XVIII

*Well count for December 2002.
FORMATION

BARRELS OIL 

PRODUCED PERCENT WELLS

BAKKEN 523682 1.8008 195

BIRDBEAR 800444 2.7525 59

CAMBRO/ORDOVICIAN 15525 0.0534 2

DAWSON BAY 45326 0.1559 3

DEVONIAN 1313156 4.5156 58

DUPEROW 925913 3.1839 116

HEATH 286907 0.9866 47

LODGEPOLE 3843486 13.2166 30

MADISON 11766767 40.4625 2062

MIDALE/NESSON 82708 0.2844 19

MISSION CANYON 3476 0.0120 1

ORDOVICIAN 813476 2.7973 58

RATCLIFFE 17263 0.0594 4

RED RIVER 1814212 6.2385 184

RED RIVER B 3959158 13.6144 260

SANISH 67798 0.2331 13

SILURIAN 686796 2.3617 59

SPEARFISH 12195 0.0419 10

SPEARFISH/CHARLES 514496 1.7692 113

SPEARFISH/MADISON 56972 0.1959 38

STONEWALL 508367 1.7481 46

TYLER 502011 1.7263 44

TYLER A 19916 0.0685 4

WEST RED RIVER 153452 0.5277 19

WINNIPEG 14 0.0000 1

WINNIPEG/DEADWOOD 1975 0.0068 3

WINNIPEGOSIS 345190 1.1870 19

2003 TOTALS 29080681 100.0000 3467

2003 NORTH DAKOTA OIL PRODUCTION BY FORMATION
FORMATION

BARRELS OIL 

PRODUCED PERCENT WELLS

BAKKEN 522235 1.6959 202

BIRDBEAR 1020546 3.3141 77

CAMBRO/ORDOVICIAN 11141 0.0362 2

DAWSON BAY 32728 0.1063 3

DEVONIAN 1175719 3.8180 57

DUPEROW 937473 3.0443 118

HEATH 240486 0.7809 47

LODGEPOLE 2953590 9.5914 29

MADISON 11948961 38.8028 2045

MIDALE/NESSON 75341 0.2447 19

MISSION CANYON 3188 0.0104 1

ORDOVICIAN 599883 1.9480 65

RATCLIFFE 14911 0.0484 4

RED RIVER 1828592 5.9381 181

RED RIVER B 6627921 21.5234 231

SANISH 64745 0.2103 13

SILURIAN 650372 2.1120 58

SPEARFISH 12619 0.0410 11

SPEARFISH/CHARLES 470161 1.5268 109

SPEARFISH/MADISON 53354 0.1733 40

STONEWALL 591471 1.9207 52

TYLER 465055 1.5102 43

TYLER A 27566 0.0895 4

WEST RED RIVER 177029 0.5749 16

WINNIPEG/DEADWOOD 1521 0.0049 3

WINNIPEGOSIS 287445 0.9334 16

2004 TOTALS 30794053 100.0000 3446

2004 NORTH DAKOTA OIL PRODUCTION BY FORMATION

1
2005 North Dakota Oil Production by Formation 

Formation 

Barrels of 

Oil Produced Percent Wells 

BAKKEN 985496 2.7902 226 

BIRDBEAR 1305418 3.6960 96 

CAMBRO/ORDOVICIAN 15214 0.0431 2 

DAWSON BAY 35759 0.1012 3 

DEVONIAN 1098339 3.1097 58 

DUPEROW 904296 2.5603 119 

HEATH 194320 0.5502 43 

LODGEPOLE 2076906 5.8803 29 

MADISON 11732155 33.2172 2069 

MIDALE/NESSON 76068 0.2154 22 

MISSION CANYON 2879 0.0082 1 

ORDOVICIAN 593650 1.6808 57 

RATCLIFFE 13555 0.0384 4 

RED RIVER 1911464 5.4119 200 

RED RIVER B 11922208 33.7553 239 

SANISH 65811 0.1863 13 

SILURIAN 584537 1.6550 56 

SPEARFISH 15766 0.0446 11 

SPEARFISH/CHARLES 439246 1.2436 105 

SPEARFISH/MADISON 48149 0.1363 36 

STONEWALL 512509 1.4511 49 

TYLER 482040 1.3648 43 

TYLER A 32881 0.0931 3 

WINNIPEG 40 0.0001 1 

WINNIPEG/DEADWOOD 1101 0.0031 2 

WINNIPEGOSIS 269703 0.7636 16 

2005 Totals 35319510 100.0000 3503 
 2006 North Dakota Oil Production by Formation

Formation

Barrels of Oil 

Produced Percent Wells

BAKKEN 2245411 5.6740 300

BIRDBEAR 1242060 3.1386 109

CAMBRO/ORDOVICIAN 15754 0.0398 2

DAWSON BAY 34061 0.0861 3

DEVONIAN 962058 2.4311 59

DUPEROW 901638 2.2784 121

GUNTON 18822 0.0476 1

HEATH 220369 0.5569 40

LODGEPOLE 1596325 4.0338 29

MADISON 11680192 29.5151 2107

MIDALE/NESSON 155200 0.3922 30

MISSION CANYON 2213 0.0056 1

ORDOVICIAN 533782 1.3488 55

RATCLIFFE 11876 0.0300 4

RED RIVER 1871889 4.7301 203

RED RIVER B 15706913 39.6903 269

SANISH 67118 0.1696 13

SILURIAN 593657 1.5001 55

SPEARFISH 15465 0.0391 9

SPEARFISH/CHARLES 416980 1.0537 106

SPEARFISH/MADISON 63128 0.1595 36

STONEWALL 463033 1.1701 51

TYLER 433896 1.0964 45

TYLER A 31035 0.0784 4

WINNIPEG/DEADWOOD 1267 0.0032 2

WINNIPEGOSIS 289508 0.7316 16

2006 Total 39573650 100.0000 3670
 2007 North Dakota Oil Production by Formation

Formation

Barrels of Oil 

Produced Percent Wells

BAKKEN 7382025 16.5139 457

BIRDBEAR 1153949 2.5814 111

CAMBRO/ORDOVICIAN 12489 0.0279 2

DAWSON BAY 31178 0.0697 3

DEVONIAN 992888 2.2211 62

DUPEROW 806651 1.8045 121

GUNTON 16729 0.0374 1

HEATH 180224 0.4032 40

LODGEPOLE 1331618 2.9789 29

MADISON 11352593 25.3962 2123

MIDALE/NESSON 178634 0.3996 28

MISSION CANYON 1967 0.0044 1

ORDOVICIAN 471503 1.0548 54

RATCLIFFE 10512 0.0235 4

RED RIVER 1891163 4.2306 209

RED RIVER B 16722579 37.4091 278

RIVAL 17291 0.0387 4

SANISH 61987 0.1387 13

SILURIAN 576815 1.2904 56

SPEARFISH 21612 0.0483 13

SPEARFISH/CHARLES 374252 0.8372 109

SPEARFISH/MADISON 53579 0.1199 36

STONEWALL 417206 0.9333 50

TYLER 374096 0.8369 42

TYLER A 29680 0.0664 4

WINNIPEG/DEADWOOD 1371 0.0031 3

WINNIPEGOSIS 237343 0.5309 19

2007 Total 44701934 100.0000 3872
 2008 North Dakota Oil Production by Formation

Formation

Barrels of Oil 

Produced Percent Wells

BAKKEN 27233329 43.6698 881

BIRDBEAR 908059 1.4561 117

CAMBRO/ORDOVICIAN 12549 0.0201 2

DAWSON BAY 26233 0.0421 3

DEVONIAN 952526 1.5274 62

DUPEROW 746653 1.1973 114

GUNTON 5029 0.0081 1

HEATH 206673 0.3314 38

LODGEPOLE 1160293 1.8606 28

MADISON 11022447 17.6750 2133

MIDALE/NESSON 342726 0.5496 36

MISSION CANYON 1576 0.0025 1

ORDOVICIAN 441636 0.7082 51

RATCLIFFE 11052 0.0177 4

RED RIVER 1772346 2.8420 208

RED RIVER B 15467112 24.8022 304

RIVAL 14483 0.0232 3

SANISH 99408 0.1594 16

SILURIAN 576630 0.9247 55

SPEARFISH 26233 0.0421 13

SPEARFISH/CHARLES 325762 0.5224 106

SPEARFISH/MADISON 51303 0.0823 38

STONEWALL 375882 0.6027 50

TYLER 291897 0.4681 41

TYLER A 28729 0.0461 4

WINNIPEG/DEADWOOD 1382 0.0022 2

WINNIPEGOSIS 259941 0.4168 20

2008 Total 62361889 100.0000 4331
 2009 North Dakota Oil Production by Formation

Formation

Barrels of Oil 

Produced Percent Wells

BAKKEN 49293744 62.1969 1341

BAKKEN/THREE FORKS 187876 0.2371 3

BIRDBEAR 697331 0.8799 108

CAMBRO/ORDOVICIAN 10498 0.0132 2

DAWSON BAY 20409 0.0258 3

DEVONIAN 772731 0.9750 60

DUPEROW 620348 0.7827 110

GUNTON 2812 0.0035 1

HEATH 199475 0.2517 39

LODGEPOLE 1005559 1.2688 29

MADISON 9705426 12.2459 2097

MIDALE/NESSON 241165 0.3043 36

MISSION CANYON 1009 0.0013 1

ORDOVICIAN 394113 0.4973 51

RATCLIFFE 9828 0.0124 4

RED RIVER 1539682 1.9427 187

RED RIVER B 12514922 15.7908 287

RIVAL 12445 0.0157 3

SANISH 325661 0.4109 18

SILURIAN 509184 0.6425 54

SPEARFISH 22251 0.0281 13

SPEARFISH/CHARLES 318110 0.4014 99

SPEARFISH/MADISON 48831 0.0616 35

STONEWALL 345614 0.4361 46

THREE FORKS 34 0.0000 1

TYLER 221279 0.2792 40

TYLER A 25939 0.0327 3

WINNIPEG/DEADWOOD 1210 0.0015 2

WINNIPEGOSIS 206815 0.2610 20

2009 Total 79254301 100.0000 4693
 2010 North Dakota Oil Production by Formation

Formation

Barrels of Oil 

Produced Percent Wells

BAKKEN 85075338 75.6016 2116

BAKKEN/THREE FORKS 464976 0.4132 7

BIRDBEAR 578506 0.5141 104

CAMBRO/ORDOVICIAN 11121 0.0099 2

DAWSON BAY 24733 0.0220 3

DEVONIAN 695137 0.6177 56

DUPEROW 609390 0.5415 112

GUNTON 1545 0.0014 1

HEATH 210490 0.1871 38

LODGEPOLE 1043054 0.9269 31

MADISON 9425079 8.3755 2091

MIDALE/NESSON 192347 0.1709 39

MISSION CANYON 1446 0.0013 1

ORDOVICIAN 319055 0.2835 52

RATCLIFFE 9101 0.0081 4

RED RIVER 1373100 1.2202 184

RED RIVER B 10503996 9.3343 274

RIVAL 10835 0.0096 3

SANISH 420594 0.3738 22

SILURIAN 453993 0.4034 47

SPEARFISH 44819 0.0398 20

SPEARFISH/CHARLES 286728 0.2548 97

SPEARFISH/MADISON 75943 0.0675 39

STONEWALL 305323 0.2713 47

TYLER 196859 0.1749 40

TYLER A 26504 0.0236 4

WINNIPEG/DEADWOOD 1270 0.0011 2

WINNIPEGOSIS 169782 0.1509 19

2010 Total 112531064 100.0000 5455
 2011 North Dakota Oil Production by Formation

Formation

Barrels of Oil 

Produced Percent Wells

BAKKEN 126178063 82.8206 3345

BAKKEN/THREE FORKS 563459 0.3698 9

BIRDBEAR 477549 0.3135 102

CAMBRO/ORDOVICIAN 9583 0.0063 2

DAWSON BAY 11684 0.0077 3

DEVONIAN 594210 0.3900 55

DUPEROW 518808 0.3405 112

GUNTON 486 0.0003 2

HEATH 182822 0.1200 38

LODGEPOLE 937928 0.6156 34

MADISON 8329249 5.4671 2051

MIDALE/NESSON 165525 0.1086 42

MISSION CANYON 1091 0.0007 1

ORDOVICIAN 349328 0.2293 50

RATCLIFFE 8181 0.0054 4

RED RIVER 1381984 0.9071 183

RED RIVER B 9244774 6.0681 272

SANISH 1983500 1.3019 44

SILURIAN 394416 0.2589 48

SPEARFISH 82218 0.0540 26

SPEARFISH/CHARLES 248844 0.1633 97

SPEARFISH/MADISON 58399 0.0383 38

STONEWALL 257372 0.1689 44

STONY MOUNTAIN 92 0.0001 1

THREE FORKS 22610 0.0148 1

TYLER 186099 0.1222 37

TYLER A 21873 0.0144 2

WINNIPEG/DEADWOOD 1360 0.0009 2

WINNIPEGOSIS 139589 0.0916 17

2011 Total 152351096 100.0000 6662
FORMATION

BARRELS OIL 

PRODUCED PERCENT WELLS

BAKKEN 215,490,552 88.94 5,128

BAKKEN/THREE FORKS 735,568 0.30 14

BIRDBEAR 439,135 0.18 99

CAMBRO/ORDOVICIAN 8,644 0.00 2

DAWSON BAY 22,730 0.01 3

DEADWOOD 55 0.00 1

DEVONIAN 552,696 0.23 53

DUPEROW 490,928 0.20 109

GUNTON 1,136 0.00 1

HEATH 192,629 0.08 36

LODGEPOLE 871,969 0.36 32

MADISON 8,269,009 3.41 2,052

MIDALE/NESSON 148,594 0.06 42

MISSION CANYON 1,034 0.00 1

ORDOVICIAN 356,494 0.15 50

RATCLIFFE 8,177 0.00 4

RED RIVER 1,607,807 0.66 186

RED RIVER B 8,361,050 3.45 270

SANISH 3,054,991 1.26 52

SILURIAN 341,493 0.14 44

SPEARFISH 349,867 0.14 45

SPEARFISH/CHARLES 263,646 0.11 97

SPEARFISH/MADISON 64,967 0.03 43

STONEWALL 238,893 0.10 44

STONY MOUNTAIN 94 0.00 1

THREE FORKS 78,483 0.03 2

TYLER 178,973 0.07 37

TYLER A 24,752 0.01 3

WINNIPEG/DEADWOOD 1,396 0.00 2

WINNIPEGOSIS 120,292 0.05 17

2012 TOTALS 242,276,054 100.00 8,470

2012 NORTH DAKOTA OIL PRODUCTION BY FORMATION

XV
FORMATION

BARRELS OIL 

PRODUCED PERCENT WELLS

BAKKEN 284,554,268 91.20 7070

BAKKEN/THREE FORKS 1,631,693 0.52 26

BIRDBEAR 403,967 0.13 96

CAMBRO/ORDOVICIAN 7,316 0.00 2

DAWSON BAY 14,097 0.00 3

DEADWOOD 10,009 0.00 1

DEVONIAN 516,040 0.17 53

DUPEROW 490,766 0.16 107

GUNTON 9,258 0.00 2

HEATH 176,143 0.06 35

LODGEPOLE 778,883 0.25 30

MADISON 7,631,719 2.45 1980

MIDALE/NESSON 128,290 0.04 42

MISSION CANYON 818 0.00 1

ORDOVICIAN 328,822 0.11 48

RATCLIFFE 7,725 0.00 4

RED RIVER 1,810,355 0.58 193

RED RIVER B 7,712,116 2.47 271

SANISH 3,860,717 1.24 76

SILURIAN 238,327 0.08 43

SPEARFISH 844,916 0.27 81

SPEARFISH/CHARLES 257,430 0.08 97

SPEARFISH/MADISON 141,866 0.05 43

STONEWALL 212,389 0.07 40

THREE FORKS 42,462 0.01 2

TYLER 176,295 0.06 34

TYLER A 22,788 0.01 3

WINNIPEG 4,180 0.00 1

WINNIPEG/DEADWOOD 1,724 0.00 2

WINNIPEGOSIS 122,573 0.04 15

2013 TOTALS 312,015,379 100.00 10,401

2013 NORTH DAKOTA OIL PRODUCTION BY FORMATION

XV
FORMATION

BARRELS OIL 

PRODUCED PERCENT WELLS

BAKKEN 361,654,835 91.71 9173

BAKKEN/THREE FORKS 3,477,315 0.88 37

BIRDBEAR 387,409 0.10 98

CAMBRO/ORDOVICIAN 6,009 0.00 2

DAWSON BAY 8,102 0.00 2

DEVONIAN 427,229 0.11 55

DUPEROW 395,970 0.10 105

GUNTON 12,387 0.00 2

HEATH 161,026 0.04 34

LODGEPOLE 697,278 0.18 33

MADISON 7,294,221 1.85 1953

MIDALE/NESSON 107,377 0.03 42

MISSION CANYON 73 0.00 1

ORDOVICIAN 300,773 0.08 46

RATCLIFFE 8,471 0.00 4

RED RIVER 1,683,219 0.43 198

RED RIVER B 7,303,872 1.85 273

SANISH 8,155,254 2.07 124

SILURIAN 233,918 0.06 39

SPEARFISH 1,045,546 0.27 114

SPEARFISH/CHARLES 310,016 0.08 119

SPEARFISH/MADISON 173,326 0.04 49

STONEWALL 163,492 0.04 39

THREE FORKS 29,432 0.01 2

TYLER 163,939 0.04 37

TYLER A 27,447 0.01 3

WINNIPEG 5,422 0.00 1

WINNIPEG/DEADWOOD 2,579 0.00 3

WINNIPEGOSIS 97,426 0.02 14

2014 TOTALS 394,333,363 100.00 12,602

2014 NORTH DAKOTA OIL PRODUCTION BY FORMATION

XV