MARY HELEN UNIT

Oil · District 03 · Lease #14976

Operator: U. S. OPERATING, INC.

Cum Oil

141k BBL

Cum Gas

1.9M MCF

casinghead

Wells

5

Production

1993-01 — 2026-04

Peak Month

2004-11

Production History

Cum Oil: 141,402 BBL Cum Gas: 1,923,740 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,452 BBL/mo

Di (annual)

59.0%

b-factor

0.4

EUR

81,240 BBL

R-squared

0.889

type

hyperbolic

Operator History (from monthly production reports)

2025-08 — 2026-07 MAGNOLIA OIL & GAS OPERATING LLC 12 mo
1993-01 — 2025-07 U. S. OPERATING, INC. 391 mo

Wells (5)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4REMAGNOLIA OIL & GAS OPERATING LLC29,3002004-07-21
3MAGNOLIA OIL & GAS OPERATING LLC39,4002004-07-14
3REMAGNOLIA OIL & GAS OPERATING LLC39,4002004-07-14
2MAGNOLIA OIL & GAS OPERATING LLC39,3002001-03-14
2REMAGNOLIA OIL & GAS OPERATING LLC39,3002001-03-14