COSPER "37"

Oil · District 08 · Lease #39198

Operator: ENDEAVOR ENERGY RESOURCES L.P.

Cum Oil

393k BBL

Cum Gas

922k MCF

casinghead

Wells

7

Production

2008-09 — 2026-04

Peak Month

2012-09

Production History

Cum Oil: 392,885 BBL Cum Gas: 921,970 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

3,897 BBL/mo

Di (annual)

16.7%

b-factor

0.0

EUR

280,542 BBL

R-squared

0.763

type

exponential

Operator History (from monthly production reports)

2025-01 — 2026-07 DIAMONDBACK E&P LLC 19 mo
2008-09 — 2024-12 ENDEAVOR ENERGY RESOURCES L.P. 196 mo

Wells (7)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1DIAMONDBACK E&P LLC312,0002018-10-04
2DIAMONDBACK E&P LLC212,0002018-06-11
3DIAMONDBACK E&P LLC312,0002018-06-06
4DIAMONDBACK E&P LLC212,0002018-06-06
7DIAMONDBACK E&P LLC112,0002014-11-21
6DIAMONDBACK E&P LLC112,0002012-06-22
5DIAMONDBACK E&P LLC112,0002012-01-13