Fields: HOWARD GLASSCOCK
Cum Oil
1.5M BBL
Cum Gas
70k MCF
casinghead
Wells
69
Production
1993-01 — 2011-11
Peak Month
1995-10
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: 1,543,650 BBL Cum Gas: 70,225 MCF
RRC production reported through Apr 2026 · recent months incomplete
Decline Curve Analysis
qi
10,773 BBL/mo
Di (annual)
15.6%
b-factor
1.0
EUR
1,802,750 BBL
R-squared
0.809
type
hyperbolic
Operator History (from monthly production reports)
Wells (69)
| WELL# | API | OPERATOR | PERMITS | DEPTH | LAST_ISSUED |
|---|---|---|---|---|---|
| 77WS | 42-227-34862 | GRAYROCK ENERGY II, LLC | 1 | 250 | 1994-09-13 |
| 76 | 42-227-34640 | GRAYROCK ENERGY II, LLC | 1 | 2,500 | 1991-04-17 |
| 69 | 42-227-31896 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 2,530 | 1979-05-21 |
| 55 | 42-227-31563 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 2,500 | 1978-01-30 |
| 68W | 42-227-31564 | ENDEAVOR ENERGY RESOURCES L.P. | 1 | 2,550 | 1978-01-30 |
| 11 | 42-227-01773 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 13 | 42-227-01775 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 14 | 42-227-01776 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 15 | 42-227-81712 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 16 | 42-227-01778 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 17 | 42-227-01779 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 19W | 42-227-01781 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 21 | 42-227-10144 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 22 | 42-227-30607 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 23 | 42-227-30678 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 24 | 42-227-30677 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 25 | 42-227-30676 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 26 | 42-227-30758 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 26W | 42-227-30758 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 27 | 42-227-30759 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 28 | 42-227-30760 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 29 | 42-227-30847 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 30 | 42-227-30882 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 31W | 42-227-30883 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 32 | 42-227-30899 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 33W | 42-227-30900 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 34 | 42-227-30939 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 34W | 42-227-30939 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 35 | 42-227-30905 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 36W | 42-227-30940 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 37 | 42-227-30941 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 38 | 42-227-30934 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 38W | 42-227-30934 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 39 | 42-227-30944 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 40W | 42-227-30933 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 41 | 42-227-30971 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 42 | 42-227-30972 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 42W | 42-227-30972 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 43 | 42-227-30975 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 44 | 42-227-30984 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 45 | 42-227-30996 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 46 | 42-227-30993 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 47W | 42-227-30995 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 48 | 42-227-30994 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 49W | 42-227-31003 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 50 | 42-227-31008 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 51 | 42-227-31068 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 52 | 42-227-31067 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 53 | 42-227-31069 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 54 | 42-227-31023 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 56 | 42-227-31024 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 57 | 42-227-31002 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 57W | 42-227-31002 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 58 | 42-227-31026 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 58W | 42-227-31026 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 59W | 42-227-31025 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 6 | 42-227-01768 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 60 | 42-227-31032 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 61 | 42-227-31028 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 62 | 42-227-31029 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 62W | 42-227-31029 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 63 | 42-227-31030 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 64 | 42-227-31044 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 65 | 42-227-31049 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 66W | 42-227-31048 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 67 | 42-227-31047 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 7 | 42-227-01769 | GRAYROCK ENERGY II, LLC | -- | -- | -- |
| 70W | 42-227-31045 | ENDEAVOR ENERGY RESOURCES L.P. | -- | -- | -- |
| 8 | 42-227-01770 | GRAYROCK ENERGY II, LLC | -- | -- | -- |