COSPER 37-48 UNIT 1B

Oil · District 08 · Lease #58098

Operator: ENDEAVOR ENERGY RESOURCES L.P.

Cum Oil

486k BBL

Cum Gas

1.5M MCF

casinghead

Wells

3

Production

2022-10 — 2026-04

Peak Month

2023-03

Production History

Cum Oil: 486,285 BBL Cum Gas: 1,500,841 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

31,511 BBL/mo

Di (annual)

116.9%

b-factor

0.6

EUR

734,645 BBL

R-squared

0.831

type

hyperbolic

Operator History (from monthly production reports)

2025-01 — 2026-07 DIAMONDBACK E&P LLC 19 mo
2022-10 — 2024-12 ENDEAVOR ENERGY RESOURCES L.P. 27 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
221DIAMONDBACK E&P LLC211,0002021-12-02
243DIAMONDBACK E&P LLC211,0002021-12-02
231DIAMONDBACK E&P LLC211,0002021-12-01