A&S Mineral Development Company, LLC Oil & Gas Wells in Montana

Operator Summary
Operator Name: A&S Mineral Development Company, LLC
Address: PO Box 1027
Poplar, MT 59255
Production Dates on File: March 2021 to February 2026

1 Counties With Production

16 Currently Producing Leases

29 Total Leases

21 Currently Producing Wells

48 Total Wells

4.2 k Barrels of Oil Produced in Jan 2026

594 MCF of Gas Produced in Jan 2026

Map of Wells Associated with A&S Mineral Development Company, LLC
A&S Mineral Development Company, LLC Production By County
Production Based on January 2026 Data
Location Total Wells Oil Production Gas Production Total BOE
Valley County 48 4,198 BBLs 594 MCF 4,231 BBLs
Leases Associated With A&S Mineral Development Company, LLC
Production Based on January 2026 Data
Lease # Lease Name Location Oil Production Gas Production
# 1766 OLFERT Valley County
# 19 KLIEWER (#1) Valley County
# 2352 TIESZEN-TOEWS Valley County
# 2490 TIESZEN (#1) Valley County
# 2756 OLFERT "B" Valley County
# 3018 IRON BEAR HEIRS (1 & 2) Valley County
# 3019 MARIE STANDING HEIRS (1) Valley County
# 3197 BELLONGER-CLARK Valley County
# 3200 CRAWFORD (A-1) Valley County
# 3289 REDDIG, J. (1) Valley County
# 3380 M. V. CAMPBELL (#1) Valley County
# 3462 WILLIAM CLARK (A-3) Valley County
# 359 REDDIG, C. Valley County
# 3624 OLFERT "C" Valley County
# 3625 REDDIG, A. (#1) Valley County
# 3640 SUN TRIBAL (14-32) Valley County
# 3737 KATHRYN HAWKINS Valley County
# 3755 WILDER-CLARK (#1) Valley County
# 4486 DAHL Valley County
# 4606 WILDER Valley County
# 4633 HENRY BEIER Valley County
# 4634 KATHERINE UNRAU Valley County
# 6508 Black Magic 1-29 Valley County
# 6509 Robert Hurley 1-30 Valley County
# 7103 Henry Beier B-2 Valley County
# 7323 Sun Tribal #2 Valley County
# 8036 Midfork Unit Valley County
# 8726 Dahl 3-16A Valley County
# 9029 Ft. Peck 6-32 Valley County
Wells Associated With A&S Mineral Development Company, LLC
Production Based on January 2026 Data
API # Well Name Location Status Oil Production Gas Production
# 25-105-21218 Tieszen-Toews 1 Valley County Producing
# 25-105-21223 C. Reddig 1 Valley County Active Injection
# 25-105-21227 Kliewer 1 Valley County Shut In
# 25-105-21229 K. Unrau Trust 1 Valley County Producing
# 25-105-21235 C. Reddig 2 Valley County Shut In
# 25-105-21239 Tieszen 1 Valley County Producing
# 25-105-21257 Tieszen-Toews 2 Valley County Producing
# 25-105-21258 Olfert "B" 1 Valley County Shut In
# 25-105-21260 Henry Beier B 2 Valley County Active Injection
# 25-105-21266 J. Reddig 1 Valley County Shut In
# 25-105-21272 Tieszen-Toews 3 Valley County Producing
# 25-105-21273 Henry Beier 3 Valley County Shut In
# 25-105-21277 Marie Standing Heirs 1 Valley County P&A - Approved
# 25-105-21280 Sun Tribal 2 Valley County Shut In
# 25-105-21282 Crawford A-1 Valley County Producing
# 25-105-21283 Olfert "B" 2 Valley County Shut In
# 25-105-21289 G. E. Wilder 2 Valley County Producing
# 25-105-21298 Cranston etal 1 Valley County Active Injection
# 25-105-21304 D. Olfert "C" 3 Valley County Shut In
# 25-105-21307 Iron Bear Heirs 2 Valley County Producing
# 25-105-21310 Bellonger-Clark 2 Valley County Producing
# 25-105-21311 D. Olfert 2 Valley County Shut In
# 25-105-21315 M. V. Campbell 1 Valley County Producing
# 25-105-21323 William Clark A-3 Valley County Producing
# 25-105-21338 Olfert "C" 1 Valley County Shut In
# 25-105-21351 C. Reddig 3 Valley County Shut In
# 25-105-21366 Harvey Grey Bear Heirs 1 Valley County Active Injection
# 25-105-21373 Olfert "C" 2 Valley County Shut In
# 25-105-21375 A. Reddig 1 Valley County Producing
# 25-105-21378 Kathryn Hawkins 1 Valley County Shut In
# 25-105-21380 Sun Tribal 14-32 Valley County Shut In
# 25-105-21383 Wilder Clark 1 Valley County Producing
# 25-105-21393 Kenneth Dahl 1-8 SWD Valley County Active Injection
# 25-105-21410 Bellonger Clark 3 Valley County Producing
# 25-105-21411 Olfert "C" 4 Valley County Shut In
# 25-105-21413 Dahl 1-16 Valley County Shut In
# 25-105-21416 Gary 1-16 Valley County Shut In
# 25-105-21417 Darlene 1-15 Valley County Shut In
# 25-105-21420 Ruggles 1-15 Valley County Shut In
# 25-105-21423 J R 1-15 Valley County Active Injection
# 25-105-21426 Suzanne 1-15 Valley County Shut In
# 25-105-21432 K. Hawkins 1-16HZ Valley County Shut In
# 25-105-21444 Robert Hurly 1-30 Valley County Shut In
# 25-105-21446 Black Magic 1-29 Valley County Producing
# 25-105-21490 Dahl 9-16 Valley County Active Injection
# 25-105-21574 Dahl 2-16 Valley County Producing
# 25-105-21576 Dahl 3-16A Valley County Producing
# 25-105-21579 Ft. Peck 6-32 Valley County Producing