Fields: SHAFTER LAKE (CLEAR FORK)
Cum Oil
5.6M BBL
Cum Gas
1.5M MCF
casinghead
Wells
79
Production
1995-02 — 2026-04
Peak Month
1997-07
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: 5,610,419 BBL Cum Gas: 1,497,718 MCF
RRC production reported through Apr 2026 · recent months incomplete
Decline Curve Analysis
qi
38,217 BBL/mo
Di (annual)
11.8%
b-factor
0.5
EUR
5,786,783 BBL
R-squared
0.852
type
hyperbolic
Operator History (from monthly production reports)
Wells (79)
| WELL# | API | OPERATOR | PERMITS | DEPTH | LAST_ISSUED |
|---|---|---|---|---|---|
| 5078 | 42-003-39235 | HIGHMARK ENERGY OPERATING, LLC | 3 | 7,200 | 2011-03-09 |
| 505R | 42-003-40909 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,000 | 2008-11-13 |
| 5245W | 42-003-39249 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 2004-05-17 |
| 4056 | 42-003-39241 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 2004-05-06 |
| 5267 | 42-003-39239 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 2004-05-06 |
| 5267W | 42-003-39239 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 2004-05-06 |
| 5278W | 42-003-39240 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 2004-05-06 |
| 4034 | 42-003-39232 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,000 | 2004-04-29 |
| 5045 | 42-003-39238 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 2004-04-07 |
| 4067 | 42-003-39237 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 2004-04-05 |
| 4256 | 42-003-39236 | HIGHMARK ENERGY OPERATING, LLC | 2 | 7,200 | 2004-04-05 |
| 5067 | 42-003-39234 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 2004-04-05 |
| 4045 | 42-003-39233 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,000 | 2004-04-01 |
| 6021 | 42-003-38890 | HIGHMARK ENERGY OPERATING, LLC | 1 | 6,999 | 2001-09-19 |
| 725W | 42-003-38569 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 2000-01-28 |
| 4071 | 42-003-38436 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1998-05-27 |
| 325W | 42-003-38285 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1997-09-19 |
| 424W | 42-003-38284 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1997-09-19 |
| 425W | 42-003-38283 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1997-09-19 |
| 125 | 42-003-37906 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1996-07-05 |
| 225 | 42-003-37907 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1996-07-05 |
| 422W | 42-003-37873 | HIGHMARK ENERGY OPERATING, LLC | 2 | 7,200 | 1996-06-03 |
| 423W | 42-003-37878 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1996-06-03 |
| 523 | 42-003-37877 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1996-06-03 |
| 523W | 42-003-37877 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1996-06-03 |
| 524 | 42-003-37876 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1996-06-03 |
| 6031 | 42-003-37872 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1996-06-03 |
| 623 | 42-003-37875 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1996-06-03 |
| 624 | 42-003-37874 | HIGHMARK ENERGY OPERATING, LLC | 2 | 7,200 | 1996-06-03 |
| 624W | 42-003-37874 | HIGHMARK ENERGY OPERATING, LLC | 2 | 7,200 | 1996-06-03 |
| 302 | 42-003-30249 | HIGHMARK ENERGY OPERATING, LLC | 2 | 7,100 | 1995-07-11 |
| 504 | 42-003-04663 | HIGHMARK ENERGY OPERATING, LLC | 1 | 9,880 | 1995-05-24 |
| 503 | 42-003-04568 | HIGHMARK ENERGY OPERATING, LLC | 1 | 9,896 | 1995-05-17 |
| 404 | 42-003-37602 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1995-02-17 |
| 105 | 42-003-37613 | HIGHMARK ENERGY OPERATING, LLC | 2 | 7,200 | 1995-02-15 |
| 307 | 42-003-37600 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1995-02-15 |
| 326 | 42-003-37601 | HIGHMARK ENERGY OPERATING, LLC | 2 | 7,200 | 1995-02-15 |
| 326W | 42-003-37601 | HIGHMARK ENERGY OPERATING, LLC | 2 | 7,200 | 1995-02-15 |
| 426 | 42-003-37603 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,000 | 1995-02-15 |
| 426W | 42-003-37603 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,000 | 1995-02-15 |
| 427 | 42-003-37604 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1995-02-15 |
| 525 | 42-003-37605 | HIGHMARK ENERGY OPERATING, LLC | 2 | 7,200 | 1995-02-15 |
| 526 | 42-003-37606 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1995-02-15 |
| 527 | 42-003-37607 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1995-02-15 |
| 527W | 42-003-37607 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1995-02-15 |
| 528 | 42-003-37608 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1995-02-15 |
| 625 | 42-003-37609 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1995-02-15 |
| 625W | 42-003-37609 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1995-02-15 |
| 626 | 42-003-37610 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1995-02-15 |
| 627 | 42-003-37611 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1995-02-15 |
| 628 | 42-003-37612 | HIGHMARK ENERGY OPERATING, LLC | 1 | 7,200 | 1995-02-15 |
| 226 | 42-003-37199 | HIGHMARK ENERGY OPERATING, LLC | 2 | 8,700 | 1993-03-01 |
| 226W | 42-003-37199 | HIGHMARK ENERGY OPERATING, LLC | 2 | 8,700 | 1993-03-01 |
| 402 | 42-003-07679 | HIGHMARK ENERGY OPERATING, LLC | 1 | 9,905 | 1990-04-06 |
| 301 | 42-003-07680 | HIGHMARK ENERGY OPERATING, LLC | 1 | 6,965 | 1987-10-27 |
| 106 | 42-003-05351 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 205 | 42-003-05348 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 206 | 42-003-05350 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 303 | 42-003-30097 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 305 | 42-003-05353 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 306 | 42-003-30244 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 403 | 42-003-30076 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 405 | 42-003-05352 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 406 | 42-003-30229 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 407 | 42-003-30272 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 408 | 42-003-30342 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 502 | 42-003-04621 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 505 | 42-003-05386 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 506 | 42-003-30176 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 507 | 42-003-30258 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 508 | 42-003-30368 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 602 | 42-003-11057 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 603 | 42-003-10739 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 604 | 42-003-04672 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 605 | 42-003-10117 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 606 | 42-003-30206 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 607 | 42-003-30271 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 608 | 42-003-30374 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |
| 705 | 42-003-30382 | HIGHMARK ENERGY OPERATING, LLC | -- | -- | -- |