< leases

ARMSTRONG-MUNSON UNIT

Oil · District 03 · Lease #21511

Operator: XTO ENERGY INC.

Fields: GIDDINGS (AUSTIN CHALK-3)

Cum Oil

492k BBL

Cum Gas

3.7M MCF

casinghead

Wells

1

Production

1993-01 — 2023-10

Peak Month

1993-03

Production History

Cum Oil: 492,254 BBL Cum Gas: 3,686,772 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

13,734 BBL/mo

Di (annual)

52.0%

b-factor

0.3

EUR

450,263 BBL

R-squared

0.966

type

hyperbolic

Operator History (from monthly production reports)

2020-07 — 2026-07 MAGNOLIA OIL & GAS OPERATING LLC 73 mo
2008-12 — 2020-06 XTO ENERGY INC. 139 mo
2002-04 — 2008-11 HUNT PETROLEUM CORPORATION 80 mo
2001-07 — 2002-03 EL PASO PRODUCTION OIL & GAS CO. 9 mo
1993-01 — 2001-06 COASTAL OIL & GAS CORPORATION 102 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
142-149-32595MAGNOLIA OIL & GAS OPERATING LLC214,9001992-07-28