WELCH "12"

Oil · District 7C · Lease #15517

Operator: ENDEAVOR ENERGY RESOURCES L.P.

Cum Oil

128k BBL

Cum Gas

220k MCF

casinghead

Wells

4

Production

2004-01 — 2026-04

Peak Month

2005-09

Production History

Cum Oil: 127,953 BBL Cum Gas: 220,481 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,360 BBL/mo

Di (annual)

15.2%

b-factor

0.0

EUR

107,442 BBL

R-squared

0.767

type

exponential

Operator History (from monthly production reports)

2025-01 — 2026-07 DIAMONDBACK E&P LLC 19 mo
2004-01 — 2024-12 ENDEAVOR ENERGY RESOURCES L.P. 252 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2DIAMONDBACK E&P LLC112,0002004-08-11
6DIAMONDBACK E&P LLC112,0002004-06-21
5DIAMONDBACK E&P LLC212,0002004-03-02
1DIAMONDBACK E&P LLC110,5002003-09-24