SURFACE, J. W.

Oil · District 03 · Lease #5621

Operator: TRI-UNION DEVELOPMENT CORP.

Cum Oil

10k BBL

Cum Gas

329 MCF

casinghead

Wells

4

Production

1993-01 — 2012-04

Peak Month

2008-06

Production History

Cum Oil: 9,811 BBL Cum Gas: 329 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

282 BBL/mo

Di (annual)

43.0%

b-factor

0.0

EUR

7,836 BBL

R-squared

0.596

type

exponential

Operator History (from monthly production reports)

2009-02 — 2026-07 DENBURY ONSHORE, LLC 210 mo
2004-11 — 2009-01 TEXCAL ENERGY (GP) LLC 51 mo
1998-04 — 2004-10 TRI-UNION DEVELOPMENT CORP. 79 mo
1993-01 — 1998-03 MW PETROLEUM CORPORATION 63 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1DENBURY ONSHORE LLC15,3501978-08-28
1242-039-30208DENBURY ONSHORE LLC------
242-039-00682DENBURY ONSHORE LLC------
342-039-00683DENBURY ONSHORE LLC------