STEPHENS -C-

Oil · District 08 · Lease #23148

Operator: SUNDOWN ENERGY LP

Fields: SULPHUR DRAW (DEAN 8790)

Cum Oil

34k BBL

Cum Gas

90k MCF

casinghead

Wells

3

Production

1993-01 — 2026-04

Peak Month

2013-07

Production History

Cum Oil: 34,352 BBL Cum Gas: 90,259 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

147 BBL/mo

Di (annual)

5.2%

b-factor

0.0

EUR

31,355 BBL

R-squared

0.322

type

exponential

Operator History (from monthly production reports)

2023-06 — 2026-07 OVINTIV USA INC. 38 mo

2019-05 — 2023-05 BLACK SWAN OPERATING, LLC 49 mo

2017-11 — 2019-04 PETROLEGACY ENERGY II, LLC 18 mo

2015-05 — 2017-10 DIAMONDBACK E&P LLC 30 mo

2005-02 — 2015-04 SUNDOWN ENERGY LP 123 mo

2002-07 — 2005-01 JETTA OPERATING COMPANY, INC. 31 mo

2001-07 — 2002-06 DEVON ENERGY PRODUCTION CO, L.P. 12 mo

1998-01 — 2001-06 CONCHO RESOURCES INC. 42 mo

1997-02 — 1997-12 COSTILLA ENERGY, INC. 11 mo

1995-06 — 1997-01 COSTILLA PETROLEUM CORPORATION 20 mo

1995-03 — 1995-05 PARKER & PARSLEY DEVELOPMENT L.P 3 mo

1993-01 — 1995-02 PARKER & PARSLEY DEVELOPMENT CO. 26 mo

Wells (3)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
3	42-317-34223	OVINTIV USA INC.	2	9,400	1999-06-15
1	42-317-31138	OVINTIV USA INC.	--	--	--
2	42-317-31228	OVINTIV USA INC.	--	--	--