COX 12-9 UNIT 1

Oil · District 08 · Lease #49245

Operator: ENDEAVOR ENERGY RESOURCES L.P.

Cum Oil

2.1M BBL

Cum Gas

5.2M MCF

casinghead

Wells

13

Production

2017-08 — 2026-04

Peak Month

2025-01

Production History

Cum Oil: 2,084,034 BBL Cum Gas: 5,158,205 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

208,092 BBL/mo

Di (annual)

426.2%

b-factor

0.7

EUR

1,731,225 BBL

R-squared

0.992

type

hyperbolic

Operator History (from monthly production reports)

2025-01 — 2026-07 DIAMONDBACK E&P LLC 19 mo
2017-08 — 2024-12 ENDEAVOR ENERGY RESOURCES L.P. 89 mo

Wells (13)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
112DIAMONDBACK E&P LLC110,8022023-09-25
123DIAMONDBACK E&P LLC110,8022023-09-25
124DIAMONDBACK E&P LLC110,8022023-09-25
125DIAMONDBACK E&P LLC110,8022023-09-25
126DIAMONDBACK E&P LLC110,8022023-09-25
131DIAMONDBACK E&P LLC110,8022023-09-25
141DIAMONDBACK E&P LLC110,8022023-09-25
142DIAMONDBACK E&P LLC110,8022023-09-25
144DIAMONDBACK E&P LLC110,8022023-09-25
243DIAMONDBACK E&P LLC110,8022023-09-25
111DIAMONDBACK E&P LLC110,8022023-09-22
221DIAMONDBACK E&P LLC211,0002017-03-28
222DIAMONDBACK E&P LLC211,0002017-03-28