COX "12A"

Oil · District 08 · Lease #41447

Operator: ENDEAVOR ENERGY RESOURCES L.P.

Cum Oil

250k BBL

Cum Gas

474k MCF

casinghead

Wells

7

Production

2000-01 — 2026-04

Peak Month

2014-12

Production History

Cum Oil: 249,680 BBL Cum Gas: 474,007 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

3,328 BBL/mo

Di (annual)

25.0%

b-factor

0.0

EUR

159,495 BBL

R-squared

0.538

type

exponential

Operator History (from monthly production reports)

2025-01 — 2026-07 DIAMONDBACK E&P LLC 19 mo
2000-01 — 2024-12 ENDEAVOR ENERGY RESOURCES L.P. 300 mo

Wells (7)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1ADIAMONDBACK E&P LLC511,0752017-04-26
6DIAMONDBACK E&P LLC112,0002014-06-30
5DIAMONDBACK E&P LLC112,0002013-11-19
4DIAMONDBACK E&P LLC112,0002013-04-08
2DIAMONDBACK E&P LLC212,0002012-10-01
3DIAMONDBACK E&P LLC112,0002012-08-21
1DIAMONDBACK E&P LLC212,0002011-02-14