DONNER-BROWN UNIT A-621

Oil · District 06 · Lease #13891

Operator: SWIFT ENERGY OPERATING, LLC

Fields: BROOKELAND (AUSTIN CHALK, 8800)

Cum Oil

37k BBL

Cum Gas

296k MCF

casinghead

Wells

1

Production

1999-03 — 2026-03

Peak Month

2021-03

Production History

Cum Oil: 37,232 BBL Cum Gas: 295,575 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,122 BBL/mo

Di (annual)

613.0%

b-factor

1.6

EUR

33,778 BBL

R-squared

0.705

type

hyperbolic

Operator History (from monthly production reports)

2023-03 — 2026-07 DB RESOURCES, LLC 41 mo

2016-04 — 2023-02 COPESTONE OPERATING, LLC 83 mo

2013-04 — 2016-03 BEECH GROVE ENERGY PARTNERS, LLC 36 mo

2006-01 — 2013-03 SWIFT ENERGY OPERATING, LLC 87 mo

1999-03 — 2005-12 SWIFT ENERGY COMPANY 82 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
1	42-351-30602	DB RESOURCES, LLC	3	12,300	2020-12-22