TUNNELL "12"

Oil · District 08 · Lease #38159

Operator: ENDEAVOR ENERGY RESOURCES L.P.

Cum Oil

174k BBL

Cum Gas

137k MCF

casinghead

Wells

2

Production

2007-03 — 2026-04

Peak Month

2008-05

Production History

Cum Oil: 174,321 BBL Cum Gas: 137,118 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,625 BBL/mo

Di (annual)

17.8%

b-factor

0.5

EUR

178,562 BBL

R-squared

0.578

type

hyperbolic

Operator History (from monthly production reports)

2025-01 — 2026-07 DIAMONDBACK E&P LLC 19 mo
2007-03 — 2024-12 ENDEAVOR ENERGY RESOURCES L.P. 214 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1DIAMONDBACK E&P LLC212,0002018-02-28
2DIAMONDBACK E&P LLC312,0002017-11-10