COULTER -B-

Oil · District 01 · Lease #1182

Operator: STINGRAY OIL COMPANY, INC.

Cum Oil

36k BBL

Cum Gas

21 MCF

casinghead

Wells

12

Production

1993-01 — 2026-04

Peak Month

2010-07

Production History

Cum Oil: 35,731 BBL Cum Gas: 21 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

525 BBL/mo

Di (annual)

23.0%

b-factor

0.2

EUR

33,863 BBL

R-squared

0.793

type

hyperbolic

Operator History (from monthly production reports)

2025-08 — 2026-07 SPECKLE TROUT OPERATING LLC 12 mo
2023-07 — 2025-07 ONE WORLD OPERATING, LLC 25 mo
2018-05 — 2023-06 RED OAK OIL COMPANY, LLC 62 mo
2007-03 — 2018-04 STINGRAY OIL COMPANY, INC. 134 mo
2000-02 — 2007-02 LITTLE RIVER OPERATING CORP. 85 mo
1998-12 — 2000-01 HERITAGE PETROLEUM CORPORATION 14 mo
1998-05 — 1998-11 ROCKDALE PARTNERS, L.L.C. 7 mo
1995-12 — 1998-04 CAP OPERATING INC. 29 mo
1994-11 — 1995-11 PENROD OIL COMPANY OF TEXAS, INC 13 mo
1994-10 — 1994-10 MOBILE PRODUCTION SYSTEMS, INC. 1 mo
1993-01 — 1994-09 PENROD OIL COMPANY OF TEXAS, INC 21 mo

Wells (12)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
10SPECKLE TROUT OPERATING LLC11,2252012-08-02
9SPECKLE TROUT OPERATING LLC11,2252012-07-31
1ASPECKLE TROUT OPERATING LLC11,1602012-05-03
5ASPECKLE TROUT OPERATING LLC11,1602012-05-01
7ASPECKLE TROUT OPERATING LLC11,1602012-05-01
C 1SPECKLE TROUT OPERATING LLC11,4001981-10-15
142-331-80006SPECKLE TROUT OPERATING LLC------
242-331-80007SPECKLE TROUT OPERATING LLC------
342-331-80008SPECKLE TROUT OPERATING LLC------
442-331-80009SPECKLE TROUT OPERATING LLC------
742-331-80012SPECKLE TROUT OPERATING LLC------
842-331-80519SPECKLE TROUT OPERATING LLC------