SHACKELFORD, DON C.

Oil · District 09 · Lease #17866

Operator: STAMPER OPERATING CO., INC.

Cum Oil

44k BBL

Cum Gas

21 MCF

casinghead

Wells

4

Production

1993-01 — 2026-04

Peak Month

1993-04

Production History

Cum Oil: 43,590 BBL Cum Gas: 21 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

149 BBL/mo

Di (annual)

3.7%

b-factor

0.0

EUR

40,730 BBL

R-squared

0.304

type

exponential

Operator History (from monthly production reports)

2024-01 — 2026-07 RIO BRAVO PRODUCTION, LLC 31 mo
1997-03 — 2023-12 STAMPER OPERATING CO., INC. 322 mo
1996-03 — 1997-02 MCMAHON-BULLINGTON LP 12 mo
1993-01 — 1996-02 MCMAHON-BULLINGTON DRILLING CO. 38 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1DRIO BRAVO PRODUCTION, LLC12,4501978-08-22
3RIO BRAVO PRODUCTION, LLC13,8001978-06-28
2RIO BRAVO PRODUCTION, LLC13,8051977-09-16
142-237-31062RIO BRAVO PRODUCTION, LLC------