PHILLIPS -14-

Oil · District 08 · Lease #36043

Operator: STEPHENS, AUTRY C.

Cum Oil

165k BBL

Cum Gas

191k MCF

casinghead

Wells

1

Production

1999-06 — 2025-05

Peak Month

2005-06

Production History

Cum Oil: 164,878 BBL Cum Gas: 190,559 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,134 BBL/mo

Di (annual)

8.2%

b-factor

0.0

EUR

163,755 BBL

R-squared

0.634

type

exponential

Operator History (from monthly production reports)

2025-01 — 2026-07 DIAMONDBACK E&P LLC 19 mo
2000-09 — 2024-12 ENDEAVOR ENERGY RESOURCES L.P. 292 mo
1999-06 — 2000-08 STEPHENS, AUTRY C. 15 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1DIAMONDBACK E&P LLC211,0002018-03-19