Fields: SHAFTER LAKE (DEVONIAN)
Cum Oil
541k BBL
Cum Gas
315k MCF
casinghead
Wells
15
Production
1993-01 — 2026-04
Peak Month
1994-10
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: 541,441 BBL Cum Gas: 315,250 MCF
RRC production reported through Apr 2026 · recent months incomplete
Decline Curve Analysis
qi
4,889 BBL/mo
Di (annual)
17.8%
b-factor
0.5
EUR
537,763 BBL
R-squared
0.876
type
hyperbolic
Operator History (from monthly production reports)
Wells (15)
| WELL# | API | OPERATOR | PERMITS | DEPTH | LAST_ISSUED |
|---|---|---|---|---|---|
| 18 | 42-003-35628 | HIGHMARK ENERGY OPERATING, LLC | 2 | 11,850 | 1993-11-16 |
| 8 | 42-003-05463 | HIGHMARK ENERGY OPERATING, LLC | 2 | 11,900 | 1989-09-12 |
| J 8 | 42-003-05463 | HIGHMARK ENERGY OPERATING, LLC | 2 | 11,900 | 1989-09-12 |
| A 3W | 42-003-05346 | HIGHMARK ENERGY OPERATING, LLC | 1 | 10,650 | 1988-08-18 |
| F 9 | 42-003-35918 | HIGHMARK ENERGY OPERATING, LLC | 1 | 9,950 | 1987-09-14 |
| 1 L | 42-003-05332 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 3 L | 42-003-05458 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 5 L | 42-003-81467 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| F 2 L | 42-003-05381 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| F 3 L | 42-003-05380 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| F 4 L | 42-003-05383 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| J 1 L | 42-003-05332 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| J 3 L | 42-003-05458 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| J 5 L | 42-003-81467 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| J 7 | 42-003-05462 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |