COSPER 37-48 UNIT 1A

Oil · District 08 · Lease #58055

Operator: ENDEAVOR ENERGY RESOURCES L.P.

Cum Oil

2.5M BBL

Cum Gas

7.4M MCF

casinghead

Wells

9

Production

2022-08 — 2026-04

Peak Month

2022-12

Production History

Cum Oil: 2,473,284 BBL Cum Gas: 7,437,771 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

271,507 BBL/mo

Di (annual)

361.1%

b-factor

0.8

EUR

3,219,062 BBL

R-squared

0.974

type

hyperbolic

Operator History (from monthly production reports)

2025-01 — 2026-07 DIAMONDBACK E&P LLC 19 mo
2022-08 — 2024-12 ENDEAVOR ENERGY RESOURCES L.P. 29 mo

Wells (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
241DIAMONDBACK E&P LLC29,0002021-11-29
112DIAMONDBACK E&P LLC29,0002021-11-23
122DIAMONDBACK E&P LLC29,0002021-11-23
124DIAMONDBACK E&P LLC39,0002021-11-23
132DIAMONDBACK E&P LLC29,0002021-11-23
142DIAMONDBACK E&P LLC29,0002021-11-23
144DIAMONDBACK E&P LLC29,0002021-11-23
211DIAMONDBACK E&P LLC29,0002021-11-23
223DIAMONDBACK E&P LLC39,0002021-11-23