MASSIE 7-8 E

Oil · District 7C · Lease #21909

Operator: ENDEAVOR ENERGY RESOURCES L.P.

Cum Oil

107k BBL

Cum Gas

618k MCF

casinghead

Wells

1

Production

2022-10 — 2026-04

Peak Month

2023-03

Production History

Cum Oil: 106,955 BBL Cum Gas: 618,192 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

3,749 BBL/mo

Di (annual)

37.9%

b-factor

0.0

EUR

118,547 BBL

R-squared

0.400

type

exponential

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 (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
251DIAMONDBACK E&P LLC111,0002022-03-03