HOLUBEC

Oil · District 08 · Lease #38404

Operator: ENDEAVOR ENERGY RESOURCES L.P.

Cum Oil

117k BBL

Cum Gas

207k MCF

casinghead

Wells

2

Production

2007-05 — 2026-04

Peak Month

2007-09

Production History

Cum Oil: 116,603 BBL Cum Gas: 207,396 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

813 BBL/mo

Di (annual)

8.8%

b-factor

0.0

EUR

109,869 BBL

R-squared

0.379

type

exponential

Operator History (from monthly production reports)

2025-01 — 2026-07 DIAMONDBACK E&P LLC 19 mo
2007-05 — 2024-12 ENDEAVOR ENERGY RESOURCES L.P. 212 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1DIAMONDBACK E&P LLC212,0002017-08-11
2DIAMONDBACK E&P LLC212,0002017-08-11