MARY ELLEN

Oil · District 7C · Lease #16989

Operator: ZARVONA ENERGY LLC

Cum Oil

33k BBL

Cum Gas

104k MCF

casinghead

Wells

2

Production

2009-08 — 2015-07

Peak Month

2010-08

Production History

Cum Oil: 33,012 BBL Cum Gas: 103,769 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,518 BBL/mo

Di (annual)

108.5%

b-factor

0.4

EUR

27,637 BBL

R-squared

0.715

type

hyperbolic

Operator History (from monthly production reports)

2025-10 — 2026-07 SAXUM OPCO, LLC 10 mo
2021-06 — 2025-09 ZARVONA ENERGY LLC 52 mo
2012-07 — 2021-05 DIAMONDBACK E&P LLC 107 mo
2010-03 — 2012-06 WINDSOR PERMIAN LLC 28 mo
2009-08 — 2010-02 WINDSOR ENERGY GROUP, L.L.C. 7 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
7SAXUM OPCO LLC211,3002009-11-05
1WINDSOR ENERGY GROUP L.L.C.210,4932009-03-10