GRAHAM

Oil · District 09 · Lease #19436

Operator: STAMPER OPERATING CO., INC.

Cum Oil

70k BBL

Cum Gas

318k MCF

casinghead

Wells

3

Production

1993-01 — 2026-04

Peak Month

2002-07

Production History

Cum Oil: 70,015 BBL Cum Gas: 318,015 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

239 BBL/mo

Di (annual)

5.2%

b-factor

0.0

EUR

50,646 BBL

R-squared

0.522

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 (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1RIO BRAVO PRODUCTION, LLC25,0001981-11-06
4RIO BRAVO PRODUCTION, LLC14,9501979-08-07
2RIO BRAVO PRODUCTION, LLC14,8001979-04-18