GRAHAM

Oil · District 09 · Lease #21879

Operator: STAMPER OPERATING CO., INC.

Cum Oil

18k BBL

Cum Gas

78k MCF

casinghead

Wells

1

Production

1993-01 — 2026-04

Peak Month

2006-07

Production History

Cum Oil: 17,821 BBL Cum Gas: 78,146 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

59 BBL/mo

Di (annual)

5.3%

b-factor

0.0

EUR

12,314 BBL

R-squared

0.511

type

exponential

Operator History (from monthly production reports)

2024-01 — 2026-07 RIO BRAVO PRODUCTION, LLC 31 mo
2002-04 — 2023-12 STAMPER OPERATING CO., INC. 261 mo
1993-01 — 2002-03 SIERRA EXPLORATION COMPANY 111 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5RIO BRAVO PRODUCTION, LLC14,9501981-12-31