Fields: SHAFTER LAKE (DEVONIAN)
Cum Oil
619k BBL
Cum Gas
487k MCF
casinghead
Wells
8
Production
1993-01 — 2026-04
Peak Month
1995-04
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: 619,357 BBL Cum Gas: 487,453 MCF
RRC production reported through Apr 2026 · recent months incomplete
Decline Curve Analysis
qi
5,111 BBL/mo
Di (annual)
12.7%
b-factor
0.1
EUR
530,266 BBL
R-squared
0.894
type
hyperbolic
Operator History (from monthly production reports)
Wells (8)
| WELL# | API | OPERATOR | PERMITS | DEPTH | LAST_ISSUED |
|---|---|---|---|---|---|
| 9 | 42-003-35918 | HIGHMARK ENERGY OPERATING, LLC | 1 | 9,950 | 1987-09-14 |
| F 9 | 42-003-35918 | HIGHMARK ENERGY OPERATING, LLC | 1 | 9,950 | 1987-09-14 |
| 2 | 42-003-05381 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 3 | 42-003-05380 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 4 | 42-003-05383 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| F 2 | 42-003-05381 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| F 3 | 42-003-05380 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| F 4 | 42-003-05383 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |