HERRING ESTATE

Oil · District 06 · Lease #12339

Operator: SOUTHWEST OPERATING, INC.-TYLER

Cum Oil

33k BBL

Cum Gas

317k MCF

casinghead

Wells

1

Production

1993-01 — 2026-04

Peak Month

1997-08

Production History

Cum Oil: 32,832 BBL Cum Gas: 316,833 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

233 BBL/mo

Di (annual)

9.8%

b-factor

0.0

EUR

28,338 BBL

R-squared

0.558

type

exponential

Operator History (from monthly production reports)

2019-09 — 2026-07 SOUTHWEST OPERATING, INC.-TYLER 83 mo
1999-01 — 2019-08 LEHNERTZ-FAULKNER, INC. 248 mo
1993-01 — 1998-12 LEHNERTZ, G. M. 72 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4SOUTHWEST OPERATING, INC.-TYLER29,2011987-12-22