COWDEN "28"

Oil · District 08 · Lease #36589

Operator: ENDEAVOR ENERGY RESOURCES L.P.

Cum Oil

520k BBL

Cum Gas

2.5M MCF

casinghead

Wells

8

Production

2001-04 — 2026-04

Peak Month

2005-03

Production History

Cum Oil: 519,501 BBL Cum Gas: 2,458,787 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

11,951 BBL/mo

Di (annual)

170.2%

b-factor

1.1

EUR

431,692 BBL

R-squared

0.830

type

hyperbolic

Operator History (from monthly production reports)

2025-01 — 2026-07 DIAMONDBACK E&P LLC 19 mo
2001-04 — 2024-12 ENDEAVOR ENERGY RESOURCES L.P. 285 mo

Wells (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3DIAMONDBACK E&P LLC311,5002017-07-14
4DIAMONDBACK E&P LLC212,0002017-07-14
5DIAMONDBACK E&P LLC312,0002017-07-14
6DIAMONDBACK E&P LLC212,0002017-07-14
7DIAMONDBACK E&P LLC212,0002017-07-14
8DIAMONDBACK E&P LLC212,0002017-07-14
2DIAMONDBACK E&P LLC111,5002001-10-09
1DIAMONDBACK E&P LLC111,5002000-09-25