Fields: HOWARD GLASSCOCK
Cum Oil
408k BBL
Cum Gas
1k MCF
casinghead
Wells
95
Production
1993-01 — 2011-11
Peak Month
1993-10
Production History Production data is a work in progress — still being validated against RRC filings. Spot something off or have questions? [email protected]
Cum Oil: 407,665 BBL Cum Gas: 1,388 MCF
RRC production reported through Apr 2026 · recent months incomplete
Decline Curve Analysis
qi
3,141 BBL/mo
Di (annual)
7.8%
b-factor
0.0
EUR
473,260 BBL
R-squared
0.758
type
exponential
Operator History (from monthly production reports)
Wells (95)
| WELL# | API | OPERATOR | PERMITS | DEPTH | LAST_ISSUED |
|---|---|---|---|---|---|
| 145 | 42-227-34019 | ENDEAVOR ENERGY RESOURCES L.P. | 2 | 1,750 | 1986-03-13 |
| 142 | 42-227-33528 | ENDEAVOR ENERGY RESOURCES L.P. | 2 | 4,000 | 1985-08-08 |
| 215 | 42-227-33029 | GRAYROCK ENERGY II, LLC | 1 | 1,650 | 1983-02-16 |
| 141 | 42-227-32728 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,500 | 1982-04-28 |
| 212 | 42-227-32725 | GRAYROCK ENERGY II, LLC | 1 | 1,500 | 1982-04-28 |
| 213 | 42-227-32724 | GRAYROCK ENERGY II, LLC | 1 | 1,550 | 1982-04-28 |
| 214 | 42-227-32723 | GRAYROCK ENERGY II, LLC | 1 | 1,500 | 1982-04-28 |
| 140 | 42-227-32442 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,550 | 1981-06-17 |
| 210 | 42-227-32460 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,550 | 1981-06-05 |
| 211 | 42-227-32459 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,550 | 1981-06-05 |
| 208 | 42-227-32233 | GRAYROCK ENERGY II, LLC | 2 | 1,550 | 1980-09-26 |
| 527 | 42-227-32230 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,550 | 1980-09-03 |
| 209 | 42-227-32234 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,550 | 1980-08-14 |
| 312 | 42-227-31994 | GRAYROCK ENERGY II, LLC | 1 | 1,535 | 1979-10-30 |
| 311 | 42-227-31993 | GRAYROCK ENERGY II, LLC | 1 | 1,560 | 1979-10-29 |
| 139W | 42-227-32004 | GRAYROCK ENERGY II, LLC | 1 | 1,500 | 1979-10-15 |
| 309 | 42-227-32003 | GRAYROCK ENERGY II, LLC | 1 | 1,610 | 1979-10-15 |
| 310 | 42-227-32005 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,605 | 1979-10-15 |
| 710 | 42-227-32006 | GRAYROCK ENERGY II, LLC | 1 | 1,520 | 1979-10-15 |
| 207 | 42-227-31990 | GRAYROCK ENERGY II, LLC | 1 | 1,550 | 1979-10-11 |
| 526 | 42-227-31989 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,600 | 1979-10-11 |
| 138 | 42-227-31873 | GRAYROCK ENERGY II, LLC | 1 | 1,500 | 1979-05-01 |
| 307 | 42-227-31872 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,500 | 1979-05-01 |
| 308W | 42-227-31874 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,575 | 1979-04-10 |
| 524 | 42-227-31875 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,525 | 1979-04-10 |
| 525 | 42-227-31876 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,650 | 1979-04-10 |
| 136W | 42-227-31865 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,550 | 1979-03-20 |
| 137W | 42-227-31864 | GRAYROCK ENERGY II, LLC | 1 | 1,550 | 1979-03-20 |
| 523 | 42-227-31862 | GRAYROCK ENERGY II, LLC | 1 | 1,550 | 1979-03-20 |
| 709 | 42-227-31863 | GRAYROCK ENERGY II, LLC | 1 | 1,525 | 1979-03-20 |
| 134W | 42-227-31812 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,550 | 1979-02-08 |
| 135 | 42-227-31809 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,550 | 1979-02-08 |
| 521 | 42-227-31810 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,550 | 1979-02-08 |
| 522 | 42-227-31811 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,650 | 1979-02-08 |
| 133 | 42-227-31721 | GRAYROCK ENERGY II, LLC | 2 | 1,480 | 1979-02-02 |
| 130 | 42-227-31730 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,495 | 1979-01-03 |
| 131 | 42-227-31729 | GRAYROCK ENERGY II, LLC | 1 | 1,525 | 1979-01-03 |
| 132 | 42-227-31728 | GRAYROCK ENERGY II, LLC | 1 | 1,505 | 1979-01-03 |
| 206 | 42-227-31727 | GRAYROCK ENERGY II, LLC | 1 | 1,520 | 1979-01-03 |
| 708 | 42-227-31726 | GRAYROCK ENERGY II, LLC | 1 | 1,475 | 1979-01-03 |
| 520 | 42-227-31722 | GRAYROCK ENERGY II, LLC | 1 | 1,480 | 1978-12-29 |
| 127W | 42-227-31678 | GRAYROCK ENERGY II, LLC | 1 | 1,550 | 1978-09-26 |
| 129 | 42-227-31681 | GRAYROCK ENERGY II, LLC | 1 | 1,500 | 1978-09-26 |
| 518 | 42-227-31679 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,550 | 1978-09-26 |
| 519 | 42-227-31680 | GRAYROCK ENERGY II, LLC | 1 | 1,550 | 1978-09-26 |
| 707W | 42-227-31677 | GRAYROCK ENERGY II, LLC | 1 | 1,550 | 1978-09-26 |
| 128 | 42-227-31682 | GRAYROCK ENERGY II, LLC | 1 | 1,550 | 1978-09-22 |
| 123 | 42-227-31602 | GRAYROCK ENERGY II, LLC | 1 | 1,500 | 1978-04-11 |
| 124 | 42-227-31603 | GRAYROCK ENERGY II, LLC | 1 | 1,460 | 1978-04-11 |
| 125 | 42-227-31604 | GRAYROCK ENERGY II, LLC | 1 | 1,520 | 1978-04-11 |
| 126 | 42-227-31605 | GRAYROCK ENERGY II, LLC | 1 | 1,550 | 1978-04-11 |
| 516 | 42-227-31606 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,520 | 1978-04-11 |
| 517 | 42-227-31607 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,570 | 1978-04-11 |
| 121 | 42-227-31540 | GRAYROCK ENERGY II, LLC | 1 | 1,510 | 1977-12-20 |
| 122 | 42-227-31541 | GRAYROCK ENERGY II, LLC | 1 | 1,450 | 1977-12-20 |
| 514 | 42-227-31542 | GRAYROCK ENERGY II, LLC | 1 | 1,590 | 1977-12-20 |
| 515W | 42-227-31543 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 1,560 | 1977-12-20 |
| 101 | 42-227-01686 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 103 | 42-227-01701 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 104 | 42-227-01708 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 105 | 42-227-01714 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 107 | 42-227-01720 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 108 | 42-227-01722 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 109 | 42-227-01724 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 112 | 42-227-01729 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 113 | 42-227-01730 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 114 | 42-227-01731 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 115 | 42-227-01732 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 117 | 42-227-30606 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 119W | 42-227-31078 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 120W | 42-227-31199 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 201 | 42-227-01688 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 202 | 42-227-01696 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 204W | 42-227-01710 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 301 | 42-227-01569 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 302 | 42-227-01697 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 303 | 42-227-01704 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 304W | 42-227-04382 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 306W | 42-227-01572 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 402 | 42-227-01698 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 501W | 42-227-01690 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 502 | 42-227-01699 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 504 | 42-227-01711 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 506 | 42-227-01719 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 508 | 42-227-01723 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 509W | 42-227-01725 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 510W | 42-227-01727 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 511W | 42-227-10143 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 512W | 42-227-30318 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 513W | 42-227-31198 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 602 | 42-431-00268 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 702W | 42-227-01700 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 704W | 42-227-01712 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 705 | 42-227-30526 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 706W | 42-227-30604 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |